From 26b0fe1b2274a72f05ae6fca3a3edb7c600041df Mon Sep 17 00:00:00 2001 From: Caleb Connolly Date: Tue, 21 Nov 2023 04:16:13 +0000 Subject: [PATCH] nanosvg: move to C file no need to keep this in a header. Signed-off-by: Caleb Connolly --- include/nanosvg.h | 3197 +-------------------------- include/nanosvgrast.h | 1659 -------------- src/nanosvg.c | 4908 ++++++++++++++++++++++++++++++++++++++++- src/pbsplash.c | 2 - 4 files changed, 4938 insertions(+), 4828 deletions(-) delete mode 100644 include/nanosvgrast.h diff --git a/include/nanosvg.h b/include/nanosvg.h index d8d5b10..2fca86a 100644 --- a/include/nanosvg.h +++ b/include/nanosvg.h @@ -27,53 +27,7 @@ * */ -#ifndef NANOSVG_H -#define NANOSVG_H - -#ifndef NANOSVG_CPLUSPLUS -#ifdef __cplusplus -extern "C" { -#endif -#endif - -// NanoSVG is a simple stupid single-header-file SVG parse. The output of the parser is a list of -// cubic bezier shapes. -// -// The library suits well for anything from rendering scalable icons in your editor application to -// prototyping a game. -// -// NanoSVG supports a wide range of SVG features, but something may be missing, feel free to create -// a pull request! -// -// The shapes in the SVG images are transformed by the viewBox and converted to specified units. -// That is, you should get the same looking data as your designed in your favorite app. -// -// NanoSVG can return the paths in few different units. For example if you want to render an image, -// you may choose to get the paths in pixels, or if you are feeding the data into a CNC-cutter, you -// may want to use millimeters. -// -// The units passed to NanoSVG should be one of: 'px', 'pt', 'pc' 'mm', 'cm', or 'in'. -// DPI (dots-per-inch) controls how the unit conversion is done. -// -// If you don't know or care about the units stuff, "px" and 96 should get you going. - -/* Example Usage: - // Load SVG - NSVGimage* image; - image = nsvgParseFromFile("test.svg", "px", 96); - printf("size: %f x %f\n", image->width, image->height); - // Use... - for (NSVGshape *shape = image->shapes; shape != NULL; shape = shape->next) { - for (NSVGpath *path = shape->paths; path != NULL; path = path->next) { - for (int i = 0; i < path->npts-1; i += 3) { - float* p = &path->pts[i*2]; - drawCubicBez(p[0],p[1], p[2],p[3], p[4],p[5], p[6],p[7]); - } - } - } - // Delete - nsvgDelete(image); -*/ +#pragma once #define NSVG_MAX_UNICODE_LEN 32 @@ -168,3118 +122,39 @@ void nsvgDelete(NSVGimage *image); NSVGshape **nsvgGetTextShapes(const NSVGimage *image, const char *text, int textLen); -#ifndef NANOSVG_CPLUSPLUS -#ifdef __cplusplus -} -#endif -#endif +typedef struct NSVGrasterizer NSVGrasterizer; + +/* Example Usage: + // Load SVG + NSVGimage* image; + image = nsvgParseFromFile("test.svg", "px", 96); + + // Create rasterizer (can be used to render multiple images). + struct NSVGrasterizer* rast = nsvgCreateRasterizer(); + // Allocate memory for image + unsigned char* img = malloc(w*h*4); + // Rasterize + nsvgRasterize(rast, image, 0,0,1, img, w, h, w*4); +*/ + +// Allocated rasterizer context. +NSVGrasterizer *nsvgCreateRasterizer(); + +// Rasterizes SVG image, returns RGBA image (non-premultiplied alpha) +// r - pointer to rasterizer context +// image - pointer to image to rasterize +// tx,ty - image offset (applied after scaling) +// scale - image scale +// dst - pointer to destination image data, 4 bytes per pixel (RGBA) +// w - width of the image to render +// h - height of the image to render +// stride - number of bytes per scaleline in the destination buffer +void nsvgRasterize(NSVGrasterizer *r, NSVGimage *image, float tx, float ty, float scale, + unsigned char *dst, int w, int h, int stride); + +// Deletes rasterizer context. +void nsvgDeleteRasterizer(NSVGrasterizer *); + +void nsvgRasterizeText(NSVGrasterizer *r, const NSVGimage *font, float tx, float ty, float scale, + unsigned char *dst, int w, int h, int stride, const char *text); -#endif // NANOSVG_H - -#ifdef NANOSVG_IMPLEMENTATION - -#include -#include -#include - -#define NSVG_PI (3.14159265358979323846264338327f) -#define NSVG_KAPPA90 \ - (0.5522847493f) // Length proportional to radius of a cubic bezier handle for 90deg arcs. - -#define NSVG_ALIGN_MIN 0 -#define NSVG_ALIGN_MID 1 -#define NSVG_ALIGN_MAX 2 -#define NSVG_ALIGN_NONE 0 -#define NSVG_ALIGN_MEET 1 -#define NSVG_ALIGN_SLICE 2 - -#define NSVG_NOTUSED(v) \ - do { \ - (void)(1 ? (void)0 : ((void)(v))); \ - } while (0) -#define NSVG_RGB(r, g, b) (((unsigned int)r) | ((unsigned int)g << 8) | ((unsigned int)b << 16)) - -#ifdef _MSC_VER -#pragma warning(disable : 4996) // Switch off security warnings -#pragma warning(disable : 4100) // Switch off unreferenced formal parameter warnings -#ifdef __cplusplus -#define NSVG_INLINE inline -#else -#define NSVG_INLINE -#endif -#else -#define NSVG_INLINE inline -#endif - -static int nsvg__isspace(char c) -{ - return strchr(" \t\n\v\f\r", c) != 0; -} - -static int nsvg__isdigit(char c) -{ - return c >= '0' && c <= '9'; -} - -static NSVG_INLINE float nsvg__minf(float a, float b) -{ - return a < b ? a : b; -} -static NSVG_INLINE float nsvg__maxf(float a, float b) -{ - return a > b ? a : b; -} - -// Simple XML parser - -#define NSVG_XML_TAG 1 -#define NSVG_XML_CONTENT 2 -#define NSVG_XML_MAX_ATTRIBS 256 - -static void nsvg__parseContent(char *s, void (*contentCb)(void *ud, const char *s), void *ud) -{ - // Trim start white spaces - while (*s && nsvg__isspace(*s)) - s++; - if (!*s) - return; - - if (contentCb) - (*contentCb)(ud, s); -} - -static void nsvg__parseElement(char *s, - void (*startelCb)(void *ud, const char *el, const char **attr), - void (*endelCb)(void *ud, const char *el), void *ud) -{ - const char *attr[NSVG_XML_MAX_ATTRIBS]; - int nattr = 0; - char *name; - int start = 0; - int end = 0; - char quote; - - // Skip white space after the '<' - while (*s && nsvg__isspace(*s)) - s++; - - // Check if the tag is end tag - if (*s == '/') { - s++; - end = 1; - } else { - start = 1; - } - - // Skip comments, data and preprocessor stuff. - if (!*s || *s == '?' || *s == '!') - return; - - // Get tag name - name = s; - while (*s && !nsvg__isspace(*s)) - s++; - if (*s) { - *s++ = '\0'; - } - - // Get attribs - while (!end && *s && nattr < NSVG_XML_MAX_ATTRIBS - 3) { - char *name = NULL; - char *value = NULL; - - // Skip white space before the attrib name - while (*s && nsvg__isspace(*s)) - s++; - if (!*s) - break; - if (*s == '/') { - end = 1; - break; - } - name = s; - // Find end of the attrib name. - while (*s && !nsvg__isspace(*s) && *s != '=') - s++; - if (*s) { - *s++ = '\0'; - } - // Skip until the beginning of the value. - while (*s && *s != '\"' && *s != '\'') - s++; - if (!*s) - break; - quote = *s; - s++; - // Store value and find the end of it. - value = s; - while (*s && *s != quote) - s++; - if (*s) { - *s++ = '\0'; - } - - // Store only well formed attributes - if (name && value) { - attr[nattr++] = name; - attr[nattr++] = value; - } - } - - // List terminator - attr[nattr++] = 0; - attr[nattr++] = 0; - - // Call callbacks. - if (start && startelCb) - (*startelCb)(ud, name, attr); - if (end && endelCb) - (*endelCb)(ud, name); -} - -int nsvg__parseXML(char *input, void (*startelCb)(void *ud, const char *el, const char **attr), - void (*endelCb)(void *ud, const char *el), - void (*contentCb)(void *ud, const char *s), void *ud) -{ - char *s = input; - char *mark = s; - int state = NSVG_XML_CONTENT; - while (*s) { - if (*s == '<' && state == NSVG_XML_CONTENT) { - // Start of a tag - *s++ = '\0'; - nsvg__parseContent(mark, contentCb, ud); - mark = s; - state = NSVG_XML_TAG; - } else if (*s == '>' && state == NSVG_XML_TAG) { - // Start of a content or new tag. - *s++ = '\0'; - nsvg__parseElement(mark, startelCb, endelCb, ud); - mark = s; - state = NSVG_XML_CONTENT; - } else { - s++; - } - } - - return 1; -} - -/* Simple SVG parser. */ - -#define NSVG_MAX_ATTR 128 - -enum NSVGgradientUnits { NSVG_USER_SPACE = 0, NSVG_OBJECT_SPACE = 1 }; - -#define NSVG_MAX_DASHES 8 - -enum NSVGunits { - NSVG_UNITS_USER, - NSVG_UNITS_PX, - NSVG_UNITS_PT, - NSVG_UNITS_PC, - NSVG_UNITS_MM, - NSVG_UNITS_CM, - NSVG_UNITS_IN, - NSVG_UNITS_PERCENT, - NSVG_UNITS_EM, - NSVG_UNITS_EX -}; - -typedef struct NSVGcoordinate { - float value; - int units; -} NSVGcoordinate; - -typedef struct NSVGlinearData { - NSVGcoordinate x1, y1, x2, y2; -} NSVGlinearData; - -typedef struct NSVGradialData { - NSVGcoordinate cx, cy, r, fx, fy; -} NSVGradialData; - -typedef struct NSVGgradientData { - char id[64]; - char ref[64]; - char type; - union { - NSVGlinearData linear; - NSVGradialData radial; - }; - char spread; - char units; - float xform[6]; - int nstops; - NSVGgradientStop *stops; - struct NSVGgradientData *next; -} NSVGgradientData; - -typedef struct NSVGattrib { - char id[64]; - float xform[6]; - unsigned int fillColor; - unsigned int strokeColor; - float opacity; - float fillOpacity; - float strokeOpacity; - char fillGradient[64]; - char strokeGradient[64]; - float strokeWidth; - float strokeDashOffset; - float strokeDashArray[NSVG_MAX_DASHES]; - int strokeDashCount; - char strokeLineJoin; - char strokeLineCap; - float miterLimit; - char fillRule; - float fontSize; - unsigned int stopColor; - float stopOpacity; - float stopOffset; - char hasFill; - char hasStroke; - char visible; -} NSVGattrib; - -typedef struct NSVGparser { - NSVGattrib attr[NSVG_MAX_ATTR]; - int attrHead; - float *pts; - int npts; - int cpts; - NSVGpath *plist; - NSVGimage *image; - NSVGgradientData *gradients; - NSVGshape *shapesTail; - float viewMinx, viewMiny, viewWidth, viewHeight; - int alignX, alignY, alignType; - float dpi; - char pathFlag; - char defsFlag; - char unicodeFlag[NSVG_MAX_UNICODE_LEN]; - const char *horizAdvFlag; -} NSVGparser; - -static void nsvg__xformIdentity(float *t) -{ - t[0] = 1.0f; - t[1] = 0.0f; - t[2] = 0.0f; - t[3] = 1.0f; - t[4] = 0.0f; - t[5] = 0.0f; -} - -static void nsvg__xformSetTranslation(float *t, float tx, float ty) -{ - t[0] = 1.0f; - t[1] = 0.0f; - t[2] = 0.0f; - t[3] = 1.0f; - t[4] = tx; - t[5] = ty; -} - -static void nsvg__xformSetScale(float *t, float sx, float sy) -{ - t[0] = sx; - t[1] = 0.0f; - t[2] = 0.0f; - t[3] = sy; - t[4] = 0.0f; - t[5] = 0.0f; -} - -static void nsvg__xformSetSkewX(float *t, float a) -{ - t[0] = 1.0f; - t[1] = 0.0f; - t[2] = tanf(a); - t[3] = 1.0f; - t[4] = 0.0f; - t[5] = 0.0f; -} - -static void nsvg__xformSetSkewY(float *t, float a) -{ - t[0] = 1.0f; - t[1] = tanf(a); - t[2] = 0.0f; - t[3] = 1.0f; - t[4] = 0.0f; - t[5] = 0.0f; -} - -static void nsvg__xformSetRotation(float *t, float a) -{ - float cs = cosf(a), sn = sinf(a); - t[0] = cs; - t[1] = sn; - t[2] = -sn; - t[3] = cs; - t[4] = 0.0f; - t[5] = 0.0f; -} - -static void nsvg__xformMultiply(float *t, float *s) -{ - float t0 = t[0] * s[0] + t[1] * s[2]; - float t2 = t[2] * s[0] + t[3] * s[2]; - float t4 = t[4] * s[0] + t[5] * s[2] + s[4]; - t[1] = t[0] * s[1] + t[1] * s[3]; - t[3] = t[2] * s[1] + t[3] * s[3]; - t[5] = t[4] * s[1] + t[5] * s[3] + s[5]; - t[0] = t0; - t[2] = t2; - t[4] = t4; -} - -static void nsvg__xformInverse(float *inv, float *t) -{ - double invdet, det = (double)t[0] * t[3] - (double)t[2] * t[1]; - if (det > -1e-6 && det < 1e-6) { - nsvg__xformIdentity(t); - return; - } - invdet = 1.0 / det; - inv[0] = (float)(t[3] * invdet); - inv[2] = (float)(-t[2] * invdet); - inv[4] = (float)(((double)t[2] * t[5] - (double)t[3] * t[4]) * invdet); - inv[1] = (float)(-t[1] * invdet); - inv[3] = (float)(t[0] * invdet); - inv[5] = (float)(((double)t[1] * t[4] - (double)t[0] * t[5]) * invdet); -} - -static void nsvg__xformPremultiply(float *t, float *s) -{ - float s2[6]; - memcpy(s2, s, sizeof(float) * 6); - nsvg__xformMultiply(s2, t); - memcpy(t, s2, sizeof(float) * 6); -} - -static void nsvg__xformPoint(float *dx, float *dy, float x, float y, float *t) -{ - *dx = x * t[0] + y * t[2] + t[4]; - *dy = x * t[1] + y * t[3] + t[5]; -} - -static void nsvg__xformVec(float *dx, float *dy, float x, float y, float *t) -{ - *dx = x * t[0] + y * t[2]; - *dy = x * t[1] + y * t[3]; -} - -#define NSVG_EPSILON (1e-12) - -static int nsvg__ptInBounds(float *pt, float *bounds) -{ - return pt[0] >= bounds[0] && pt[0] <= bounds[2] && pt[1] >= bounds[1] && pt[1] <= bounds[3]; -} - -static double nsvg__evalBezier(double t, double p0, double p1, double p2, double p3) -{ - double it = 1.0 - t; - return it * it * it * p0 + 3.0 * it * it * t * p1 + 3.0 * it * t * t * p2 + t * t * t * p3; -} - -static void nsvg__curveBounds(float *bounds, float *curve) -{ - int i, j, count; - double roots[2], a, b, c, b2ac, t, v; - float *v0 = &curve[0]; - float *v1 = &curve[2]; - float *v2 = &curve[4]; - float *v3 = &curve[6]; - - // Start the bounding box by end points - bounds[0] = nsvg__minf(v0[0], v3[0]); - bounds[1] = nsvg__minf(v0[1], v3[1]); - bounds[2] = nsvg__maxf(v0[0], v3[0]); - bounds[3] = nsvg__maxf(v0[1], v3[1]); - - // Bezier curve fits inside the convex hull of it's control points. - // If control points are inside the bounds, we're done. - if (nsvg__ptInBounds(v1, bounds) && nsvg__ptInBounds(v2, bounds)) - return; - - // Add bezier curve inflection points in X and Y. - for (i = 0; i < 2; i++) { - a = -3.0 * v0[i] + 9.0 * v1[i] - 9.0 * v2[i] + 3.0 * v3[i]; - b = 6.0 * v0[i] - 12.0 * v1[i] + 6.0 * v2[i]; - c = 3.0 * v1[i] - 3.0 * v0[i]; - count = 0; - if (fabs(a) < NSVG_EPSILON) { - if (fabs(b) > NSVG_EPSILON) { - t = -c / b; - if (t > NSVG_EPSILON && t < 1.0 - NSVG_EPSILON) - roots[count++] = t; - } - } else { - b2ac = b * b - 4.0 * c * a; - if (b2ac > NSVG_EPSILON) { - t = (-b + sqrt(b2ac)) / (2.0 * a); - if (t > NSVG_EPSILON && t < 1.0 - NSVG_EPSILON) - roots[count++] = t; - t = (-b - sqrt(b2ac)) / (2.0 * a); - if (t > NSVG_EPSILON && t < 1.0 - NSVG_EPSILON) - roots[count++] = t; - } - } - for (j = 0; j < count; j++) { - v = nsvg__evalBezier(roots[j], v0[i], v1[i], v2[i], v3[i]); - bounds[0 + i] = nsvg__minf(bounds[0 + i], (float)v); - bounds[2 + i] = nsvg__maxf(bounds[2 + i], (float)v); - } - } -} - -static NSVGparser *nsvg__createParser() -{ - NSVGparser *p; - p = (NSVGparser *)malloc(sizeof(NSVGparser)); - if (p == NULL) - goto error; - memset(p, 0, sizeof(NSVGparser)); - - p->image = (NSVGimage *)malloc(sizeof(NSVGimage)); - if (p->image == NULL) - goto error; - memset(p->image, 0, sizeof(NSVGimage)); - - // Init style - nsvg__xformIdentity(p->attr[0].xform); - memset(p->attr[0].id, 0, sizeof p->attr[0].id); - p->attr[0].fillColor = NSVG_RGB(0, 0, 0); - p->attr[0].strokeColor = NSVG_RGB(0, 0, 0); - p->attr[0].opacity = 1; - p->attr[0].fillOpacity = 1; - p->attr[0].strokeOpacity = 1; - p->attr[0].stopOpacity = 1; - p->attr[0].strokeWidth = 1; - p->attr[0].strokeLineJoin = NSVG_JOIN_MITER; - p->attr[0].strokeLineCap = NSVG_CAP_BUTT; - p->attr[0].miterLimit = 4; - p->attr[0].fillRule = NSVG_FILLRULE_NONZERO; - p->attr[0].hasFill = 1; - p->attr[0].visible = 1; - - return p; - -error: - if (p) { - if (p->image) - free(p->image); - free(p); - } - return NULL; -} - -static void nsvg__deletePaths(NSVGpath *path) -{ - while (path) { - NSVGpath *next = path->next; - if (path->pts != NULL) - free(path->pts); - free(path); - path = next; - } -} - -static void nsvg__deletePaint(NSVGpaint *paint) -{ - if (paint->type == NSVG_PAINT_LINEAR_GRADIENT || paint->type == NSVG_PAINT_RADIAL_GRADIENT) - free(paint->gradient); -} - -static void nsvg__deleteGradientData(NSVGgradientData *grad) -{ - NSVGgradientData *next; - while (grad != NULL) { - next = grad->next; - free(grad->stops); - free(grad); - grad = next; - } -} - -static void nsvg__deleteParser(NSVGparser *p) -{ - if (p != NULL) { - nsvg__deletePaths(p->plist); - nsvg__deleteGradientData(p->gradients); - nsvgDelete(p->image); - free(p->pts); - free(p); - } -} - -static void nsvg__resetPath(NSVGparser *p) -{ - p->npts = 0; -} - -static void nsvg__addPoint(NSVGparser *p, float x, float y) -{ - if (p->npts + 1 > p->cpts) { - p->cpts = p->cpts ? p->cpts * 2 : 8; - p->pts = (float *)realloc(p->pts, p->cpts * 2 * sizeof(float)); - if (!p->pts) - return; - } - p->pts[p->npts * 2 + 0] = x; - p->pts[p->npts * 2 + 1] = y; - p->npts++; -} - -static void nsvg__moveTo(NSVGparser *p, float x, float y) -{ - if (p->npts > 0) { - p->pts[(p->npts - 1) * 2 + 0] = x; - p->pts[(p->npts - 1) * 2 + 1] = y; - } else { - nsvg__addPoint(p, x, y); - } -} - -static void nsvg__lineTo(NSVGparser *p, float x, float y) -{ - float px, py, dx, dy; - if (p->npts > 0) { - px = p->pts[(p->npts - 1) * 2 + 0]; - py = p->pts[(p->npts - 1) * 2 + 1]; - dx = x - px; - dy = y - py; - nsvg__addPoint(p, px + dx / 3.0f, py + dy / 3.0f); - nsvg__addPoint(p, x - dx / 3.0f, y - dy / 3.0f); - nsvg__addPoint(p, x, y); - } -} - -static void nsvg__cubicBezTo(NSVGparser *p, float cpx1, float cpy1, float cpx2, float cpy2, float x, - float y) -{ - if (p->npts > 0) { - nsvg__addPoint(p, cpx1, cpy1); - nsvg__addPoint(p, cpx2, cpy2); - nsvg__addPoint(p, x, y); - } -} - -static NSVGattrib *nsvg__getAttr(NSVGparser *p) -{ - return &p->attr[p->attrHead]; -} - -static void nsvg__pushAttr(NSVGparser *p) -{ - if (p->attrHead < NSVG_MAX_ATTR - 1) { - p->attrHead++; - memcpy(&p->attr[p->attrHead], &p->attr[p->attrHead - 1], sizeof(NSVGattrib)); - } -} - -static void nsvg__popAttr(NSVGparser *p) -{ - if (p->attrHead > 0) - p->attrHead--; -} - -static float nsvg__actualOrigX(NSVGparser *p) -{ - return p->viewMinx; -} - -static float nsvg__actualOrigY(NSVGparser *p) -{ - return p->viewMiny; -} - -static float nsvg__actualWidth(NSVGparser *p) -{ - return p->viewWidth; -} - -static float nsvg__actualHeight(NSVGparser *p) -{ - return p->viewHeight; -} - -static float nsvg__actualLength(NSVGparser *p) -{ - float w = nsvg__actualWidth(p), h = nsvg__actualHeight(p); - return sqrtf(w * w + h * h) / sqrtf(2.0f); -} - -static float nsvg__convertToPixels(NSVGparser *p, NSVGcoordinate c, float orig, float length) -{ - NSVGattrib *attr = nsvg__getAttr(p); - switch (c.units) { - case NSVG_UNITS_USER: - return c.value; - case NSVG_UNITS_PX: - return c.value; - case NSVG_UNITS_PT: - return c.value / 72.0f * p->dpi; - case NSVG_UNITS_PC: - return c.value / 6.0f * p->dpi; - case NSVG_UNITS_MM: - return c.value / 25.4f * p->dpi; - case NSVG_UNITS_CM: - return c.value / 2.54f * p->dpi; - case NSVG_UNITS_IN: - return c.value * p->dpi; - case NSVG_UNITS_EM: - return c.value * attr->fontSize; - case NSVG_UNITS_EX: - return c.value * attr->fontSize * 0.52f; // x-height of Helvetica. - case NSVG_UNITS_PERCENT: - return orig + c.value / 100.0f * length; - default: - return c.value; - } - return c.value; -} - -static NSVGgradientData *nsvg__findGradientData(NSVGparser *p, const char *id) -{ - NSVGgradientData *grad = p->gradients; - if (id == NULL || *id == '\0') - return NULL; - while (grad != NULL) { - if (strcmp(grad->id, id) == 0) - return grad; - grad = grad->next; - } - return NULL; -} - -static NSVGgradient *nsvg__createGradient(NSVGparser *p, const char *id, const float *localBounds, - char *paintType) -{ - NSVGattrib *attr = nsvg__getAttr(p); - NSVGgradientData *data = NULL; - NSVGgradientData *ref = NULL; - NSVGgradientStop *stops = NULL; - NSVGgradient *grad; - float ox, oy, sw, sh, sl; - int nstops = 0; - int refIter; - - data = nsvg__findGradientData(p, id); - if (data == NULL) - return NULL; - - // TODO: use ref to fill in all unset values too. - ref = data; - refIter = 0; - while (ref != NULL) { - NSVGgradientData *nextRef = NULL; - if (stops == NULL && ref->stops != NULL) { - stops = ref->stops; - nstops = ref->nstops; - break; - } - nextRef = nsvg__findGradientData(p, ref->ref); - if (nextRef == ref) - break; // prevent infite loops on malformed data - ref = nextRef; - refIter++; - if (refIter > 32) - break; // prevent infite loops on malformed data - } - if (stops == NULL) - return NULL; - - grad = (NSVGgradient *)malloc(sizeof(NSVGgradient) + - sizeof(NSVGgradientStop) * (nstops - 1)); - if (grad == NULL) - return NULL; - - // The shape width and height. - if (data->units == NSVG_OBJECT_SPACE) { - ox = localBounds[0]; - oy = localBounds[1]; - sw = localBounds[2] - localBounds[0]; - sh = localBounds[3] - localBounds[1]; - } else { - ox = nsvg__actualOrigX(p); - oy = nsvg__actualOrigY(p); - sw = nsvg__actualWidth(p); - sh = nsvg__actualHeight(p); - } - sl = sqrtf(sw * sw + sh * sh) / sqrtf(2.0f); - - if (data->type == NSVG_PAINT_LINEAR_GRADIENT) { - float x1, y1, x2, y2, dx, dy; - x1 = nsvg__convertToPixels(p, data->linear.x1, ox, sw); - y1 = nsvg__convertToPixels(p, data->linear.y1, oy, sh); - x2 = nsvg__convertToPixels(p, data->linear.x2, ox, sw); - y2 = nsvg__convertToPixels(p, data->linear.y2, oy, sh); - // Calculate transform aligned to the line - dx = x2 - x1; - dy = y2 - y1; - grad->xform[0] = dy; - grad->xform[1] = -dx; - grad->xform[2] = dx; - grad->xform[3] = dy; - grad->xform[4] = x1; - grad->xform[5] = y1; - } else { - float cx, cy, fx, fy, r; - cx = nsvg__convertToPixels(p, data->radial.cx, ox, sw); - cy = nsvg__convertToPixels(p, data->radial.cy, oy, sh); - fx = nsvg__convertToPixels(p, data->radial.fx, ox, sw); - fy = nsvg__convertToPixels(p, data->radial.fy, oy, sh); - r = nsvg__convertToPixels(p, data->radial.r, 0, sl); - // Calculate transform aligned to the circle - grad->xform[0] = r; - grad->xform[1] = 0; - grad->xform[2] = 0; - grad->xform[3] = r; - grad->xform[4] = cx; - grad->xform[5] = cy; - grad->fx = fx / r; - grad->fy = fy / r; - } - - nsvg__xformMultiply(grad->xform, data->xform); - nsvg__xformMultiply(grad->xform, attr->xform); - - grad->spread = data->spread; - memcpy(grad->stops, stops, nstops * sizeof(NSVGgradientStop)); - grad->nstops = nstops; - - *paintType = data->type; - - return grad; -} - -static float nsvg__getAverageScale(float *t) -{ - float sx = sqrtf(t[0] * t[0] + t[2] * t[2]); - float sy = sqrtf(t[1] * t[1] + t[3] * t[3]); - return (sx + sy) * 0.5f; -} - -static void nsvg__getLocalBounds(float *bounds, NSVGshape *shape, float *xform) -{ - NSVGpath *path; - float curve[4 * 2], curveBounds[4]; - int i, first = 1; - for (path = shape->paths; path != NULL; path = path->next) { - nsvg__xformPoint(&curve[0], &curve[1], path->pts[0], path->pts[1], xform); - for (i = 0; i < path->npts - 1; i += 3) { - nsvg__xformPoint(&curve[2], &curve[3], path->pts[(i + 1) * 2], - path->pts[(i + 1) * 2 + 1], xform); - nsvg__xformPoint(&curve[4], &curve[5], path->pts[(i + 2) * 2], - path->pts[(i + 2) * 2 + 1], xform); - nsvg__xformPoint(&curve[6], &curve[7], path->pts[(i + 3) * 2], - path->pts[(i + 3) * 2 + 1], xform); - nsvg__curveBounds(curveBounds, curve); - if (first) { - bounds[0] = curveBounds[0]; - bounds[1] = curveBounds[1]; - bounds[2] = curveBounds[2]; - bounds[3] = curveBounds[3]; - first = 0; - } else { - bounds[0] = nsvg__minf(bounds[0], curveBounds[0]); - bounds[1] = nsvg__minf(bounds[1], curveBounds[1]); - bounds[2] = nsvg__maxf(bounds[2], curveBounds[2]); - bounds[3] = nsvg__maxf(bounds[3], curveBounds[3]); - } - curve[0] = curve[6]; - curve[1] = curve[7]; - } - } -} - -static void nsvg__addShape(NSVGparser *p) -{ - NSVGattrib *attr = nsvg__getAttr(p); - float scale = 1.0f; - NSVGshape *shape; - char *end; - NSVGpath *path; - int i; - - if (p->plist == NULL) - return; - - shape = (NSVGshape *)malloc(sizeof(NSVGshape)); - if (shape == NULL) - goto error; - memset(shape, 0, sizeof(NSVGshape)); - - memcpy(shape->id, attr->id, sizeof shape->id); - scale = nsvg__getAverageScale(attr->xform); - shape->strokeWidth = attr->strokeWidth * scale; - shape->strokeDashOffset = attr->strokeDashOffset * scale; - shape->strokeDashCount = (char)attr->strokeDashCount; - for (i = 0; i < attr->strokeDashCount; i++) - shape->strokeDashArray[i] = attr->strokeDashArray[i] * scale; - shape->strokeLineJoin = attr->strokeLineJoin; - shape->strokeLineCap = attr->strokeLineCap; - shape->miterLimit = attr->miterLimit; - shape->fillRule = attr->fillRule; - shape->opacity = attr->opacity; - - if (p->unicodeFlag[0]) { - strcat(shape->unicode, p->unicodeFlag); - if (p->horizAdvFlag) { - shape->horizAdvX = strtol(p->horizAdvFlag, &end, 10); - if (end == p->horizAdvFlag) - shape->horizAdvX = 0; - } - if (shape->horizAdvX == 0) { - shape->horizAdvX = p->image->defaultHorizAdv; - } - p->unicodeFlag[0] = '\0'; - p->horizAdvFlag = NULL; - } - - shape->paths = p->plist; - p->plist = NULL; - - // Calculate shape bounds - shape->bounds[0] = shape->paths->bounds[0]; - shape->bounds[1] = shape->paths->bounds[1]; - shape->bounds[2] = shape->paths->bounds[2]; - shape->bounds[3] = shape->paths->bounds[3]; - for (path = shape->paths->next; path != NULL; path = path->next) { - shape->bounds[0] = nsvg__minf(shape->bounds[0], path->bounds[0]); - shape->bounds[1] = nsvg__minf(shape->bounds[1], path->bounds[1]); - shape->bounds[2] = nsvg__maxf(shape->bounds[2], path->bounds[2]); - shape->bounds[3] = nsvg__maxf(shape->bounds[3], path->bounds[3]); - } - - // Set fill - if (attr->hasFill == 0) { - shape->fill.type = NSVG_PAINT_NONE; - } else if (attr->hasFill == 1) { - shape->fill.type = NSVG_PAINT_COLOR; - shape->fill.color = attr->fillColor; - shape->fill.color |= (unsigned int)(attr->fillOpacity * 255) << 24; - } else if (attr->hasFill == 2) { - float inv[6], localBounds[4]; - nsvg__xformInverse(inv, attr->xform); - nsvg__getLocalBounds(localBounds, shape, inv); - shape->fill.gradient = - nsvg__createGradient(p, attr->fillGradient, localBounds, &shape->fill.type); - if (shape->fill.gradient == NULL) { - shape->fill.type = NSVG_PAINT_NONE; - } - } - - // Set stroke - if (attr->hasStroke == 0) { - shape->stroke.type = NSVG_PAINT_NONE; - } else if (attr->hasStroke == 1) { - shape->stroke.type = NSVG_PAINT_COLOR; - shape->stroke.color = attr->strokeColor; - shape->stroke.color |= (unsigned int)(attr->strokeOpacity * 255) << 24; - } else if (attr->hasStroke == 2) { - float inv[6], localBounds[4]; - nsvg__xformInverse(inv, attr->xform); - nsvg__getLocalBounds(localBounds, shape, inv); - shape->stroke.gradient = nsvg__createGradient(p, attr->strokeGradient, localBounds, - &shape->stroke.type); - if (shape->stroke.gradient == NULL) - shape->stroke.type = NSVG_PAINT_NONE; - } - - // Set flags - shape->flags = (attr->visible ? NSVG_FLAGS_VISIBLE : 0x00); - - // Add to tail - if (p->image->shapes == NULL) - p->image->shapes = shape; - else - p->shapesTail->next = shape; - p->shapesTail = shape; - - return; - -error: - if (shape) - free(shape); -} - -static void nsvg__addPath(NSVGparser *p, char closed) -{ - NSVGattrib *attr = nsvg__getAttr(p); - NSVGpath *path = NULL; - float bounds[4]; - float *curve; - int i; - - if (p->npts < 4) - return; - - if (closed) - nsvg__lineTo(p, p->pts[0], p->pts[1]); - - // Expect 1 + N*3 points (N = number of cubic bezier segments). - if ((p->npts % 3) != 1) - return; - - path = (NSVGpath *)malloc(sizeof(NSVGpath)); - if (path == NULL) - goto error; - memset(path, 0, sizeof(NSVGpath)); - - path->pts = (float *)malloc(p->npts * 2 * sizeof(float)); - if (path->pts == NULL) - goto error; - path->closed = closed; - path->npts = p->npts; - - // Transform path. - for (i = 0; i < p->npts; ++i) - nsvg__xformPoint(&path->pts[i * 2], &path->pts[i * 2 + 1], p->pts[i * 2], - p->pts[i * 2 + 1], attr->xform); - - // Find bounds - for (i = 0; i < path->npts - 1; i += 3) { - curve = &path->pts[i * 2]; - nsvg__curveBounds(bounds, curve); - if (i == 0) { - path->bounds[0] = bounds[0]; - path->bounds[1] = bounds[1]; - path->bounds[2] = bounds[2]; - path->bounds[3] = bounds[3]; - } else { - path->bounds[0] = nsvg__minf(path->bounds[0], bounds[0]); - path->bounds[1] = nsvg__minf(path->bounds[1], bounds[1]); - path->bounds[2] = nsvg__maxf(path->bounds[2], bounds[2]); - path->bounds[3] = nsvg__maxf(path->bounds[3], bounds[3]); - } - } - - path->next = p->plist; - p->plist = path; - - return; - -error: - if (path != NULL) { - if (path->pts != NULL) - free(path->pts); - free(path); - } -} - -// We roll our own string to float because the std library one uses locale and messes things up. -static double nsvg__atof(const char *s) -{ - char *cur = (char *)s; - char *end = NULL; - double res = 0.0, sign = 1.0; - long long intPart = 0, fracPart = 0; - char hasIntPart = 0, hasFracPart = 0; - - // Parse optional sign - if (*cur == '+') { - cur++; - } else if (*cur == '-') { - sign = -1; - cur++; - } - - // Parse integer part - if (nsvg__isdigit(*cur)) { - // Parse digit sequence - intPart = strtoll(cur, &end, 10); - if (cur != end) { - res = (double)intPart; - hasIntPart = 1; - cur = end; - } - } - - // Parse fractional part. - if (*cur == '.') { - cur++; // Skip '.' - if (nsvg__isdigit(*cur)) { - // Parse digit sequence - fracPart = strtoll(cur, &end, 10); - if (cur != end) { - res += (double)fracPart / pow(10.0, (double)(end - cur)); - hasFracPart = 1; - cur = end; - } - } - } - - // A valid number should have integer or fractional part. - if (!hasIntPart && !hasFracPart) - return 0.0; - - // Parse optional exponent - if (*cur == 'e' || *cur == 'E') { - long expPart = 0; - cur++; // skip 'E' - expPart = strtol(cur, &end, 10); // Parse digit sequence with sign - if (cur != end) { - res *= pow(10.0, (double)expPart); - } - } - - return res * sign; -} - -static const char *nsvg__parseNumber(const char *s, char *it, const int size) -{ - const int last = size - 1; - int i = 0; - - // sign - if (*s == '-' || *s == '+') { - if (i < last) - it[i++] = *s; - s++; - } - // integer part - while (*s && nsvg__isdigit(*s)) { - if (i < last) - it[i++] = *s; - s++; - } - if (*s == '.') { - // decimal point - if (i < last) - it[i++] = *s; - s++; - // fraction part - while (*s && nsvg__isdigit(*s)) { - if (i < last) - it[i++] = *s; - s++; - } - } - // exponent - if ((*s == 'e' || *s == 'E') && (s[1] != 'm' && s[1] != 'x')) { - if (i < last) - it[i++] = *s; - s++; - if (*s == '-' || *s == '+') { - if (i < last) - it[i++] = *s; - s++; - } - while (*s && nsvg__isdigit(*s)) { - if (i < last) - it[i++] = *s; - s++; - } - } - it[i] = '\0'; - - return s; -} - -static const char *nsvg__getNextPathItem(const char *s, char *it) -{ - it[0] = '\0'; - // Skip white spaces and commas - while (*s && (nsvg__isspace(*s) || *s == ',')) - s++; - if (!*s) - return s; - if (*s == '-' || *s == '+' || *s == '.' || nsvg__isdigit(*s)) { - s = nsvg__parseNumber(s, it, 64); - } else { - // Parse command - it[0] = *s++; - it[1] = '\0'; - return s; - } - - return s; -} - -static unsigned int nsvg__parseColorHex(const char *str) -{ - unsigned int r = 0, g = 0, b = 0; - if (sscanf(str, "#%2x%2x%2x", &r, &g, &b) == 3) // 2 digit hex - return NSVG_RGB(r, g, b); - if (sscanf(str, "#%1x%1x%1x", &r, &g, &b) == 3) // 1 digit hex, e.g. #abc -> 0xccbbaa - return NSVG_RGB(r * 17, g * 17, b * 17); // same effect as (r<<4|r), (g<<4|g), .. - return NSVG_RGB(128, 128, 128); -} - -static unsigned int nsvg__parseColorRGB(const char *str) -{ - unsigned int r = 0, g = 0, b = 0; - if (sscanf(str, "rgb(%u, %u, %u)", &r, &g, &b) == 3) // decimal integers - return NSVG_RGB(r, g, b); - if (sscanf(str, "rgb(%u%%, %u%%, %u%%)", &r, &g, &b) == 3) // decimal integer percentage - return NSVG_RGB(r * 255 / 100, g * 255 / 100, b * 255 / 100); - return NSVG_RGB(128, 128, 128); -} - -typedef struct NSVGNamedColor { - const char *name; - unsigned int color; -} NSVGNamedColor; - -NSVGNamedColor nsvg__colors[] = { - - { "red", NSVG_RGB(255, 0, 0) }, - { "green", NSVG_RGB(0, 128, 0) }, - { "blue", NSVG_RGB(0, 0, 255) }, - { "yellow", NSVG_RGB(255, 255, 0) }, - { "cyan", NSVG_RGB(0, 255, 255) }, - { "magenta", NSVG_RGB(255, 0, 255) }, - { "black", NSVG_RGB(0, 0, 0) }, - { "grey", NSVG_RGB(128, 128, 128) }, - { "gray", NSVG_RGB(128, 128, 128) }, - { "white", NSVG_RGB(255, 255, 255) }, - -#ifdef NANOSVG_ALL_COLOR_KEYWORDS - { "aliceblue", NSVG_RGB(240, 248, 255) }, - { "antiquewhite", NSVG_RGB(250, 235, 215) }, - { "aqua", NSVG_RGB(0, 255, 255) }, - { "aquamarine", NSVG_RGB(127, 255, 212) }, - { "azure", NSVG_RGB(240, 255, 255) }, - { "beige", NSVG_RGB(245, 245, 220) }, - { "bisque", NSVG_RGB(255, 228, 196) }, - { "blanchedalmond", NSVG_RGB(255, 235, 205) }, - { "blueviolet", NSVG_RGB(138, 43, 226) }, - { "brown", NSVG_RGB(165, 42, 42) }, - { "burlywood", NSVG_RGB(222, 184, 135) }, - { "cadetblue", NSVG_RGB(95, 158, 160) }, - { "chartreuse", NSVG_RGB(127, 255, 0) }, - { "chocolate", NSVG_RGB(210, 105, 30) }, - { "coral", NSVG_RGB(255, 127, 80) }, - { "cornflowerblue", NSVG_RGB(100, 149, 237) }, - { "cornsilk", NSVG_RGB(255, 248, 220) }, - { "crimson", NSVG_RGB(220, 20, 60) }, - { "darkblue", NSVG_RGB(0, 0, 139) }, - { "darkcyan", NSVG_RGB(0, 139, 139) }, - { "darkgoldenrod", NSVG_RGB(184, 134, 11) }, - { "darkgray", NSVG_RGB(169, 169, 169) }, - { "darkgreen", NSVG_RGB(0, 100, 0) }, - { "darkgrey", NSVG_RGB(169, 169, 169) }, - { "darkkhaki", NSVG_RGB(189, 183, 107) }, - { "darkmagenta", NSVG_RGB(139, 0, 139) }, - { "darkolivegreen", NSVG_RGB(85, 107, 47) }, - { "darkorange", NSVG_RGB(255, 140, 0) }, - { "darkorchid", NSVG_RGB(153, 50, 204) }, - { "darkred", NSVG_RGB(139, 0, 0) }, - { "darksalmon", NSVG_RGB(233, 150, 122) }, - { "darkseagreen", NSVG_RGB(143, 188, 143) }, - { "darkslateblue", NSVG_RGB(72, 61, 139) }, - { "darkslategray", NSVG_RGB(47, 79, 79) }, - { "darkslategrey", NSVG_RGB(47, 79, 79) }, - { "darkturquoise", NSVG_RGB(0, 206, 209) }, - { "darkviolet", NSVG_RGB(148, 0, 211) }, - { "deeppink", NSVG_RGB(255, 20, 147) }, - { "deepskyblue", NSVG_RGB(0, 191, 255) }, - { "dimgray", NSVG_RGB(105, 105, 105) }, - { "dimgrey", NSVG_RGB(105, 105, 105) }, - { "dodgerblue", NSVG_RGB(30, 144, 255) }, - { "firebrick", NSVG_RGB(178, 34, 34) }, - { "floralwhite", NSVG_RGB(255, 250, 240) }, - { "forestgreen", NSVG_RGB(34, 139, 34) }, - { "fuchsia", NSVG_RGB(255, 0, 255) }, - { "gainsboro", NSVG_RGB(220, 220, 220) }, - { "ghostwhite", NSVG_RGB(248, 248, 255) }, - { "gold", NSVG_RGB(255, 215, 0) }, - { "goldenrod", NSVG_RGB(218, 165, 32) }, - { "greenyellow", NSVG_RGB(173, 255, 47) }, - { "honeydew", NSVG_RGB(240, 255, 240) }, - { "hotpink", NSVG_RGB(255, 105, 180) }, - { "indianred", NSVG_RGB(205, 92, 92) }, - { "indigo", NSVG_RGB(75, 0, 130) }, - { "ivory", NSVG_RGB(255, 255, 240) }, - { "khaki", NSVG_RGB(240, 230, 140) }, - { "lavender", NSVG_RGB(230, 230, 250) }, - { "lavenderblush", NSVG_RGB(255, 240, 245) }, - { "lawngreen", NSVG_RGB(124, 252, 0) }, - { "lemonchiffon", NSVG_RGB(255, 250, 205) }, - { "lightblue", NSVG_RGB(173, 216, 230) }, - { "lightcoral", NSVG_RGB(240, 128, 128) }, - { "lightcyan", NSVG_RGB(224, 255, 255) }, - { "lightgoldenrodyellow", NSVG_RGB(250, 250, 210) }, - { "lightgray", NSVG_RGB(211, 211, 211) }, - { "lightgreen", NSVG_RGB(144, 238, 144) }, - { "lightgrey", NSVG_RGB(211, 211, 211) }, - { "lightpink", NSVG_RGB(255, 182, 193) }, - { "lightsalmon", NSVG_RGB(255, 160, 122) }, - { "lightseagreen", NSVG_RGB(32, 178, 170) }, - { "lightskyblue", NSVG_RGB(135, 206, 250) }, - { "lightslategray", NSVG_RGB(119, 136, 153) }, - { "lightslategrey", NSVG_RGB(119, 136, 153) }, - { "lightsteelblue", NSVG_RGB(176, 196, 222) }, - { "lightyellow", NSVG_RGB(255, 255, 224) }, - { "lime", NSVG_RGB(0, 255, 0) }, - { "limegreen", NSVG_RGB(50, 205, 50) }, - { "linen", NSVG_RGB(250, 240, 230) }, - { "maroon", NSVG_RGB(128, 0, 0) }, - { "mediumaquamarine", NSVG_RGB(102, 205, 170) }, - { "mediumblue", NSVG_RGB(0, 0, 205) }, - { "mediumorchid", NSVG_RGB(186, 85, 211) }, - { "mediumpurple", NSVG_RGB(147, 112, 219) }, - { "mediumseagreen", NSVG_RGB(60, 179, 113) }, - { "mediumslateblue", NSVG_RGB(123, 104, 238) }, - { "mediumspringgreen", NSVG_RGB(0, 250, 154) }, - { "mediumturquoise", NSVG_RGB(72, 209, 204) }, - { "mediumvioletred", NSVG_RGB(199, 21, 133) }, - { "midnightblue", NSVG_RGB(25, 25, 112) }, - { "mintcream", NSVG_RGB(245, 255, 250) }, - { "mistyrose", NSVG_RGB(255, 228, 225) }, - { "moccasin", NSVG_RGB(255, 228, 181) }, - { "navajowhite", NSVG_RGB(255, 222, 173) }, - { "navy", NSVG_RGB(0, 0, 128) }, - { "oldlace", NSVG_RGB(253, 245, 230) }, - { "olive", NSVG_RGB(128, 128, 0) }, - { "olivedrab", NSVG_RGB(107, 142, 35) }, - { "orange", NSVG_RGB(255, 165, 0) }, - { "orangered", NSVG_RGB(255, 69, 0) }, - { "orchid", NSVG_RGB(218, 112, 214) }, - { "palegoldenrod", NSVG_RGB(238, 232, 170) }, - { "palegreen", NSVG_RGB(152, 251, 152) }, - { "paleturquoise", NSVG_RGB(175, 238, 238) }, - { "palevioletred", NSVG_RGB(219, 112, 147) }, - { "papayawhip", NSVG_RGB(255, 239, 213) }, - { "peachpuff", NSVG_RGB(255, 218, 185) }, - { "peru", NSVG_RGB(205, 133, 63) }, - { "pink", NSVG_RGB(255, 192, 203) }, - { "plum", NSVG_RGB(221, 160, 221) }, - { "powderblue", NSVG_RGB(176, 224, 230) }, - { "purple", NSVG_RGB(128, 0, 128) }, - { "rosybrown", NSVG_RGB(188, 143, 143) }, - { "royalblue", NSVG_RGB(65, 105, 225) }, - { "saddlebrown", NSVG_RGB(139, 69, 19) }, - { "salmon", NSVG_RGB(250, 128, 114) }, - { "sandybrown", NSVG_RGB(244, 164, 96) }, - { "seagreen", NSVG_RGB(46, 139, 87) }, - { "seashell", NSVG_RGB(255, 245, 238) }, - { "sienna", NSVG_RGB(160, 82, 45) }, - { "silver", NSVG_RGB(192, 192, 192) }, - { "skyblue", NSVG_RGB(135, 206, 235) }, - { "slateblue", NSVG_RGB(106, 90, 205) }, - { "slategray", NSVG_RGB(112, 128, 144) }, - { "slategrey", NSVG_RGB(112, 128, 144) }, - { "snow", NSVG_RGB(255, 250, 250) }, - { "springgreen", NSVG_RGB(0, 255, 127) }, - { "steelblue", NSVG_RGB(70, 130, 180) }, - { "tan", NSVG_RGB(210, 180, 140) }, - { "teal", NSVG_RGB(0, 128, 128) }, - { "thistle", NSVG_RGB(216, 191, 216) }, - { "tomato", NSVG_RGB(255, 99, 71) }, - { "turquoise", NSVG_RGB(64, 224, 208) }, - { "violet", NSVG_RGB(238, 130, 238) }, - { "wheat", NSVG_RGB(245, 222, 179) }, - { "whitesmoke", NSVG_RGB(245, 245, 245) }, - { "yellowgreen", NSVG_RGB(154, 205, 50) }, -#endif -}; - -static unsigned int nsvg__parseColorName(const char *str) -{ - int i, ncolors = sizeof(nsvg__colors) / sizeof(NSVGNamedColor); - - for (i = 0; i < ncolors; i++) { - if (strcmp(nsvg__colors[i].name, str) == 0) { - return nsvg__colors[i].color; - } - } - - return NSVG_RGB(128, 128, 128); -} - -static unsigned int nsvg__parseColor(const char *str) -{ - size_t len = 0; - while (*str == ' ') - ++str; - len = strlen(str); - if (len >= 1 && *str == '#') - return nsvg__parseColorHex(str); - else if (len >= 4 && str[0] == 'r' && str[1] == 'g' && str[2] == 'b' && str[3] == '(') - return nsvg__parseColorRGB(str); - return nsvg__parseColorName(str); -} - -static float nsvg__parseOpacity(const char *str) -{ - float val = nsvg__atof(str); - if (val < 0.0f) - val = 0.0f; - if (val > 1.0f) - val = 1.0f; - return val; -} - -static float nsvg__parseMiterLimit(const char *str) -{ - float val = nsvg__atof(str); - if (val < 0.0f) - val = 0.0f; - return val; -} - -static int nsvg__parseUnits(const char *units) -{ - if (units[0] == 'p' && units[1] == 'x') - return NSVG_UNITS_PX; - else if (units[0] == 'p' && units[1] == 't') - return NSVG_UNITS_PT; - else if (units[0] == 'p' && units[1] == 'c') - return NSVG_UNITS_PC; - else if (units[0] == 'm' && units[1] == 'm') - return NSVG_UNITS_MM; - else if (units[0] == 'c' && units[1] == 'm') - return NSVG_UNITS_CM; - else if (units[0] == 'i' && units[1] == 'n') - return NSVG_UNITS_IN; - else if (units[0] == '%') - return NSVG_UNITS_PERCENT; - else if (units[0] == 'e' && units[1] == 'm') - return NSVG_UNITS_EM; - else if (units[0] == 'e' && units[1] == 'x') - return NSVG_UNITS_EX; - return NSVG_UNITS_USER; -} - -static int nsvg__isCoordinate(const char *s) -{ - // optional sign - if (*s == '-' || *s == '+') - s++; - // must have at least one digit, or start by a dot - return (nsvg__isdigit(*s) || *s == '.'); -} - -static NSVGcoordinate nsvg__parseCoordinateRaw(const char *str) -{ - NSVGcoordinate coord = { 0, NSVG_UNITS_USER }; - char buf[64]; - coord.units = nsvg__parseUnits(nsvg__parseNumber(str, buf, 64)); - coord.value = nsvg__atof(buf); - return coord; -} - -static NSVGcoordinate nsvg__coord(float v, int units) -{ - NSVGcoordinate coord = { v, units }; - return coord; -} - -static float nsvg__parseCoordinate(NSVGparser *p, const char *str, float orig, float length) -{ - NSVGcoordinate coord = nsvg__parseCoordinateRaw(str); - return nsvg__convertToPixels(p, coord, orig, length); -} - -static int nsvg__parseTransformArgs(const char *str, float *args, int maxNa, int *na) -{ - const char *end; - const char *ptr; - char it[64]; - - *na = 0; - ptr = str; - while (*ptr && *ptr != '(') - ++ptr; - if (*ptr == 0) - return 1; - end = ptr; - while (*end && *end != ')') - ++end; - if (*end == 0) - return 1; - - while (ptr < end) { - if (*ptr == '-' || *ptr == '+' || *ptr == '.' || nsvg__isdigit(*ptr)) { - if (*na >= maxNa) - return 0; - ptr = nsvg__parseNumber(ptr, it, 64); - args[(*na)++] = (float)nsvg__atof(it); - } else { - ++ptr; - } - } - return (int)(end - str); -} - -static int nsvg__parseMatrix(float *xform, const char *str) -{ - float t[6]; - int na = 0; - int len = nsvg__parseTransformArgs(str, t, 6, &na); - if (na != 6) - return len; - memcpy(xform, t, sizeof(float) * 6); - return len; -} - -static int nsvg__parseTranslate(float *xform, const char *str) -{ - float args[2]; - float t[6]; - int na = 0; - int len = nsvg__parseTransformArgs(str, args, 2, &na); - if (na == 1) - args[1] = 0.0; - - nsvg__xformSetTranslation(t, args[0], args[1]); - memcpy(xform, t, sizeof(float) * 6); - return len; -} - -static int nsvg__parseScale(float *xform, const char *str) -{ - float args[2]; - int na = 0; - float t[6]; - int len = nsvg__parseTransformArgs(str, args, 2, &na); - if (na == 1) - args[1] = args[0]; - nsvg__xformSetScale(t, args[0], args[1]); - memcpy(xform, t, sizeof(float) * 6); - return len; -} - -static int nsvg__parseSkewX(float *xform, const char *str) -{ - float args[1]; - int na = 0; - float t[6]; - int len = nsvg__parseTransformArgs(str, args, 1, &na); - nsvg__xformSetSkewX(t, args[0] / 180.0f * NSVG_PI); - memcpy(xform, t, sizeof(float) * 6); - return len; -} - -static int nsvg__parseSkewY(float *xform, const char *str) -{ - float args[1]; - int na = 0; - float t[6]; - int len = nsvg__parseTransformArgs(str, args, 1, &na); - nsvg__xformSetSkewY(t, args[0] / 180.0f * NSVG_PI); - memcpy(xform, t, sizeof(float) * 6); - return len; -} - -static int nsvg__parseRotate(float *xform, const char *str) -{ - float args[3]; - int na = 0; - float m[6]; - float t[6]; - int len = nsvg__parseTransformArgs(str, args, 3, &na); - if (na == 1) - args[1] = args[2] = 0.0f; - nsvg__xformIdentity(m); - - if (na > 1) { - nsvg__xformSetTranslation(t, -args[1], -args[2]); - nsvg__xformMultiply(m, t); - } - - nsvg__xformSetRotation(t, args[0] / 180.0f * NSVG_PI); - nsvg__xformMultiply(m, t); - - if (na > 1) { - nsvg__xformSetTranslation(t, args[1], args[2]); - nsvg__xformMultiply(m, t); - } - - memcpy(xform, m, sizeof(float) * 6); - - return len; -} - -static void nsvg__parseTransform(float *xform, const char *str) -{ - float t[6]; - int len; - nsvg__xformIdentity(xform); - while (*str) { - if (strncmp(str, "matrix", 6) == 0) - len = nsvg__parseMatrix(t, str); - else if (strncmp(str, "translate", 9) == 0) - len = nsvg__parseTranslate(t, str); - else if (strncmp(str, "scale", 5) == 0) - len = nsvg__parseScale(t, str); - else if (strncmp(str, "rotate", 6) == 0) - len = nsvg__parseRotate(t, str); - else if (strncmp(str, "skewX", 5) == 0) - len = nsvg__parseSkewX(t, str); - else if (strncmp(str, "skewY", 5) == 0) - len = nsvg__parseSkewY(t, str); - else { - ++str; - continue; - } - if (len != 0) { - str += len; - } else { - ++str; - continue; - } - - nsvg__xformPremultiply(xform, t); - } -} - -static void nsvg__parseUrl(char *id, const char *str) -{ - int i = 0; - str += 4; // "url("; - if (*str == '#') - str++; - while (i < 63 && *str != ')') { - id[i] = *str++; - i++; - } - id[i] = '\0'; -} - -static char nsvg__parseLineCap(const char *str) -{ - if (strcmp(str, "butt") == 0) - return NSVG_CAP_BUTT; - else if (strcmp(str, "round") == 0) - return NSVG_CAP_ROUND; - else if (strcmp(str, "square") == 0) - return NSVG_CAP_SQUARE; - // TODO: handle inherit. - return NSVG_CAP_BUTT; -} - -static char nsvg__parseLineJoin(const char *str) -{ - if (strcmp(str, "miter") == 0) - return NSVG_JOIN_MITER; - else if (strcmp(str, "round") == 0) - return NSVG_JOIN_ROUND; - else if (strcmp(str, "bevel") == 0) - return NSVG_JOIN_BEVEL; - // TODO: handle inherit. - return NSVG_JOIN_MITER; -} - -static char nsvg__parseFillRule(const char *str) -{ - if (strcmp(str, "nonzero") == 0) - return NSVG_FILLRULE_NONZERO; - else if (strcmp(str, "evenodd") == 0) - return NSVG_FILLRULE_EVENODD; - // TODO: handle inherit. - return NSVG_FILLRULE_NONZERO; -} - -static const char *nsvg__getNextDashItem(const char *s, char *it) -{ - int n = 0; - it[0] = '\0'; - // Skip white spaces and commas - while (*s && (nsvg__isspace(*s) || *s == ',')) - s++; - // Advance until whitespace, comma or end. - while (*s && (!nsvg__isspace(*s) && *s != ',')) { - if (n < 63) - it[n++] = *s; - s++; - } - it[n++] = '\0'; - return s; -} - -static int nsvg__parseStrokeDashArray(NSVGparser *p, const char *str, float *strokeDashArray) -{ - char item[64]; - int count = 0, i; - float sum = 0.0f; - - // Handle "none" - if (str[0] == 'n') - return 0; - - // Parse dashes - while (*str) { - str = nsvg__getNextDashItem(str, item); - if (!*item) - break; - if (count < NSVG_MAX_DASHES) - strokeDashArray[count++] = - fabsf(nsvg__parseCoordinate(p, item, 0.0f, nsvg__actualLength(p))); - } - - for (i = 0; i < count; i++) - sum += strokeDashArray[i]; - if (sum <= 1e-6f) - count = 0; - - return count; -} - -static void nsvg__parseStyle(NSVGparser *p, const char *str); - -static int nsvg__parseAttr(NSVGparser *p, const char *name, const char *value) -{ - float xform[6]; - NSVGattrib *attr = nsvg__getAttr(p); - if (!attr) - return 0; - - if (strcmp(name, "style") == 0) { - nsvg__parseStyle(p, value); - } else if (strcmp(name, "display") == 0) { - if (strcmp(value, "none") == 0) - attr->visible = 0; - // Don't reset ->visible on display:inline, one display:none hides the whole subtree - - } else if (strcmp(name, "fill") == 0) { - if (strcmp(value, "none") == 0) { - attr->hasFill = 0; - } else if (strncmp(value, "url(", 4) == 0) { - attr->hasFill = 2; - nsvg__parseUrl(attr->fillGradient, value); - } else { - attr->hasFill = 1; - attr->fillColor = nsvg__parseColor(value); - } - } else if (strcmp(name, "opacity") == 0) { - attr->opacity = nsvg__parseOpacity(value); - } else if (strcmp(name, "fill-opacity") == 0) { - attr->fillOpacity = nsvg__parseOpacity(value); - } else if (strcmp(name, "stroke") == 0) { - if (strcmp(value, "none") == 0) { - attr->hasStroke = 0; - } else if (strncmp(value, "url(", 4) == 0) { - attr->hasStroke = 2; - nsvg__parseUrl(attr->strokeGradient, value); - } else { - attr->hasStroke = 1; - attr->strokeColor = nsvg__parseColor(value); - } - } else if (strcmp(name, "stroke-width") == 0) { - attr->strokeWidth = nsvg__parseCoordinate(p, value, 0.0f, nsvg__actualLength(p)); - } else if (strcmp(name, "stroke-dasharray") == 0) { - attr->strokeDashCount = nsvg__parseStrokeDashArray(p, value, attr->strokeDashArray); - } else if (strcmp(name, "stroke-dashoffset") == 0) { - attr->strokeDashOffset = - nsvg__parseCoordinate(p, value, 0.0f, nsvg__actualLength(p)); - } else if (strcmp(name, "stroke-opacity") == 0) { - attr->strokeOpacity = nsvg__parseOpacity(value); - } else if (strcmp(name, "stroke-linecap") == 0) { - attr->strokeLineCap = nsvg__parseLineCap(value); - } else if (strcmp(name, "stroke-linejoin") == 0) { - attr->strokeLineJoin = nsvg__parseLineJoin(value); - } else if (strcmp(name, "stroke-miterlimit") == 0) { - attr->miterLimit = nsvg__parseMiterLimit(value); - } else if (strcmp(name, "fill-rule") == 0) { - attr->fillRule = nsvg__parseFillRule(value); - } else if (strcmp(name, "font-size") == 0) { - attr->fontSize = nsvg__parseCoordinate(p, value, 0.0f, nsvg__actualLength(p)); - } else if (strcmp(name, "transform") == 0) { - nsvg__parseTransform(xform, value); - nsvg__xformPremultiply(attr->xform, xform); - } else if (strcmp(name, "stop-color") == 0) { - attr->stopColor = nsvg__parseColor(value); - } else if (strcmp(name, "stop-opacity") == 0) { - attr->stopOpacity = nsvg__parseOpacity(value); - } else if (strcmp(name, "offset") == 0) { - attr->stopOffset = nsvg__parseCoordinate(p, value, 0.0f, 1.0f); - } else if (strcmp(name, "id") == 0) { - strncpy(attr->id, value, 63); - attr->id[63] = '\0'; - } else { - return 0; - } - return 1; -} - -static int nsvg__parseNameValue(NSVGparser *p, const char *start, const char *end) -{ - const char *str; - const char *val; - char name[512]; - char value[512]; - int n; - - str = start; - while (str < end && *str != ':') - ++str; - - val = str; - - // Right Trim - while (str > start && (*str == ':' || nsvg__isspace(*str))) - --str; - ++str; - - n = (int)(str - start); - if (n > 511) - n = 511; - if (n) - memcpy(name, start, n); - name[n] = 0; - - while (val < end && (*val == ':' || nsvg__isspace(*val))) - ++val; - - n = (int)(end - val); - if (n > 511) - n = 511; - if (n) - memcpy(value, val, n); - value[n] = 0; - - return nsvg__parseAttr(p, name, value); -} - -static void nsvg__parseStyle(NSVGparser *p, const char *str) -{ - const char *start; - const char *end; - - while (*str) { - // Left Trim - while (*str && nsvg__isspace(*str)) - ++str; - start = str; - while (*str && *str != ';') - ++str; - end = str; - - // Right Trim - while (end > start && (*end == ';' || nsvg__isspace(*end))) - --end; - ++end; - - nsvg__parseNameValue(p, start, end); - if (*str) - ++str; - } -} - -static void nsvg__parseAttribs(NSVGparser *p, const char **attr) -{ - int i; - char *end; - for (i = 0; attr[i]; i += 2) { - if (strcmp(attr[i], "style") == 0) { - nsvg__parseStyle(p, attr[i + 1]); - } else if (strcmp(attr[i], "horiz-adv-x") == 0) { - p->image->defaultHorizAdv = strtol(attr[i + 1], &end, 10); - if (end == attr[i + 1]) - p->image->defaultHorizAdv = 0; - } else if (strcmp(attr[i], "ascent") == 0) { - p->image->fontAscent = strtol(attr[i + 1], &end, 10); - if (end == attr[i + 1]) - p->image->fontAscent = 0; - } else if (strcmp(attr[i], "descent") == 0) { - p->image->fontDescent = strtol(attr[i + 1], &end, 10); - if (end == attr[i + 1]) - p->image->fontDescent = 0; - } else { - nsvg__parseAttr(p, attr[i], attr[i + 1]); - } - } -} - -static int nsvg__getArgsPerElement(char cmd) -{ - switch (cmd) { - case 'v': - case 'V': - case 'h': - case 'H': - return 1; - case 'm': - case 'M': - case 'l': - case 'L': - case 't': - case 'T': - return 2; - case 'q': - case 'Q': - case 's': - case 'S': - return 4; - case 'c': - case 'C': - return 6; - case 'a': - case 'A': - return 7; - case 'z': - case 'Z': - return 0; - } - return -1; -} - -static void nsvg__pathMoveTo(NSVGparser *p, float *cpx, float *cpy, float *args, int rel) -{ - if (rel) { - *cpx += args[0]; - *cpy += args[1]; - } else { - *cpx = args[0]; - *cpy = args[1]; - } - nsvg__moveTo(p, *cpx, *cpy); -} - -static void nsvg__pathLineTo(NSVGparser *p, float *cpx, float *cpy, float *args, int rel) -{ - if (rel) { - *cpx += args[0]; - *cpy += args[1]; - } else { - *cpx = args[0]; - *cpy = args[1]; - } - nsvg__lineTo(p, *cpx, *cpy); -} - -static void nsvg__pathHLineTo(NSVGparser *p, float *cpx, float *cpy, float *args, int rel) -{ - if (rel) - *cpx += args[0]; - else - *cpx = args[0]; - nsvg__lineTo(p, *cpx, *cpy); -} - -static void nsvg__pathVLineTo(NSVGparser *p, float *cpx, float *cpy, float *args, int rel) -{ - if (rel) - *cpy += args[0]; - else - *cpy = args[0]; - nsvg__lineTo(p, *cpx, *cpy); -} - -static void nsvg__pathCubicBezTo(NSVGparser *p, float *cpx, float *cpy, float *cpx2, float *cpy2, - float *args, int rel) -{ - float x2, y2, cx1, cy1, cx2, cy2; - - if (rel) { - cx1 = *cpx + args[0]; - cy1 = *cpy + args[1]; - cx2 = *cpx + args[2]; - cy2 = *cpy + args[3]; - x2 = *cpx + args[4]; - y2 = *cpy + args[5]; - } else { - cx1 = args[0]; - cy1 = args[1]; - cx2 = args[2]; - cy2 = args[3]; - x2 = args[4]; - y2 = args[5]; - } - - nsvg__cubicBezTo(p, cx1, cy1, cx2, cy2, x2, y2); - - *cpx2 = cx2; - *cpy2 = cy2; - *cpx = x2; - *cpy = y2; -} - -static void nsvg__pathCubicBezShortTo(NSVGparser *p, float *cpx, float *cpy, float *cpx2, - float *cpy2, float *args, int rel) -{ - float x1, y1, x2, y2, cx1, cy1, cx2, cy2; - - x1 = *cpx; - y1 = *cpy; - if (rel) { - cx2 = *cpx + args[0]; - cy2 = *cpy + args[1]; - x2 = *cpx + args[2]; - y2 = *cpy + args[3]; - } else { - cx2 = args[0]; - cy2 = args[1]; - x2 = args[2]; - y2 = args[3]; - } - - cx1 = 2 * x1 - *cpx2; - cy1 = 2 * y1 - *cpy2; - - nsvg__cubicBezTo(p, cx1, cy1, cx2, cy2, x2, y2); - - *cpx2 = cx2; - *cpy2 = cy2; - *cpx = x2; - *cpy = y2; -} - -static void nsvg__pathQuadBezTo(NSVGparser *p, float *cpx, float *cpy, float *cpx2, float *cpy2, - float *args, int rel) -{ - float x1, y1, x2, y2, cx, cy; - float cx1, cy1, cx2, cy2; - - x1 = *cpx; - y1 = *cpy; - if (rel) { - cx = *cpx + args[0]; - cy = *cpy + args[1]; - x2 = *cpx + args[2]; - y2 = *cpy + args[3]; - } else { - cx = args[0]; - cy = args[1]; - x2 = args[2]; - y2 = args[3]; - } - - // Convert to cubic bezier - cx1 = x1 + 2.0f / 3.0f * (cx - x1); - cy1 = y1 + 2.0f / 3.0f * (cy - y1); - cx2 = x2 + 2.0f / 3.0f * (cx - x2); - cy2 = y2 + 2.0f / 3.0f * (cy - y2); - - nsvg__cubicBezTo(p, cx1, cy1, cx2, cy2, x2, y2); - - *cpx2 = cx; - *cpy2 = cy; - *cpx = x2; - *cpy = y2; -} - -static void nsvg__pathQuadBezShortTo(NSVGparser *p, float *cpx, float *cpy, float *cpx2, - float *cpy2, float *args, int rel) -{ - float x1, y1, x2, y2, cx, cy; - float cx1, cy1, cx2, cy2; - - x1 = *cpx; - y1 = *cpy; - if (rel) { - x2 = *cpx + args[0]; - y2 = *cpy + args[1]; - } else { - x2 = args[0]; - y2 = args[1]; - } - - cx = 2 * x1 - *cpx2; - cy = 2 * y1 - *cpy2; - - // Convert to cubix bezier - cx1 = x1 + 2.0f / 3.0f * (cx - x1); - cy1 = y1 + 2.0f / 3.0f * (cy - y1); - cx2 = x2 + 2.0f / 3.0f * (cx - x2); - cy2 = y2 + 2.0f / 3.0f * (cy - y2); - - nsvg__cubicBezTo(p, cx1, cy1, cx2, cy2, x2, y2); - - *cpx2 = cx; - *cpy2 = cy; - *cpx = x2; - *cpy = y2; -} - -static float nsvg__sqr(float x) -{ - return x * x; -} -static float nsvg__vmag(float x, float y) -{ - return sqrtf(x * x + y * y); -} - -static float nsvg__vecrat(float ux, float uy, float vx, float vy) -{ - return (ux * vx + uy * vy) / (nsvg__vmag(ux, uy) * nsvg__vmag(vx, vy)); -} - -static float nsvg__vecang(float ux, float uy, float vx, float vy) -{ - float r = nsvg__vecrat(ux, uy, vx, vy); - if (r < -1.0f) - r = -1.0f; - if (r > 1.0f) - r = 1.0f; - return ((ux * vy < uy * vx) ? -1.0f : 1.0f) * acosf(r); -} - -static void nsvg__pathArcTo(NSVGparser *p, float *cpx, float *cpy, float *args, int rel) -{ - // Ported from canvg (https://code.google.com/p/canvg/) - float rx, ry, rotx; - float x1, y1, x2, y2, cx, cy, dx, dy, d; - float x1p, y1p, cxp, cyp, s, sa, sb; - float ux, uy, vx, vy, a1, da; - float x, y, tanx, tany, a, px = 0, py = 0, ptanx = 0, ptany = 0, t[6]; - float sinrx, cosrx; - int fa, fs; - int i, ndivs; - float hda, kappa; - - rx = fabsf(args[0]); // y radius - ry = fabsf(args[1]); // x radius - rotx = args[2] / 180.0f * NSVG_PI; // x rotation angle - fa = fabsf(args[3]) > 1e-6 ? 1 : 0; // Large arc - fs = fabsf(args[4]) > 1e-6 ? 1 : 0; // Sweep direction - x1 = *cpx; // start point - y1 = *cpy; - if (rel) { // end point - x2 = *cpx + args[5]; - y2 = *cpy + args[6]; - } else { - x2 = args[5]; - y2 = args[6]; - } - - dx = x1 - x2; - dy = y1 - y2; - d = sqrtf(dx * dx + dy * dy); - if (d < 1e-6f || rx < 1e-6f || ry < 1e-6f) { - // The arc degenerates to a line - nsvg__lineTo(p, x2, y2); - *cpx = x2; - *cpy = y2; - return; - } - - sinrx = sinf(rotx); - cosrx = cosf(rotx); - - // Convert to center point parameterization. - // http://www.w3.org/TR/SVG11/implnote.html#ArcImplementationNotes - // 1) Compute x1', y1' - x1p = cosrx * dx / 2.0f + sinrx * dy / 2.0f; - y1p = -sinrx * dx / 2.0f + cosrx * dy / 2.0f; - d = nsvg__sqr(x1p) / nsvg__sqr(rx) + nsvg__sqr(y1p) / nsvg__sqr(ry); - if (d > 1) { - d = sqrtf(d); - rx *= d; - ry *= d; - } - // 2) Compute cx', cy' - s = 0.0f; - sa = nsvg__sqr(rx) * nsvg__sqr(ry) - nsvg__sqr(rx) * nsvg__sqr(y1p) - - nsvg__sqr(ry) * nsvg__sqr(x1p); - sb = nsvg__sqr(rx) * nsvg__sqr(y1p) + nsvg__sqr(ry) * nsvg__sqr(x1p); - if (sa < 0.0f) - sa = 0.0f; - if (sb > 0.0f) - s = sqrtf(sa / sb); - if (fa == fs) - s = -s; - cxp = s * rx * y1p / ry; - cyp = s * -ry * x1p / rx; - - // 3) Compute cx,cy from cx',cy' - cx = (x1 + x2) / 2.0f + cosrx * cxp - sinrx * cyp; - cy = (y1 + y2) / 2.0f + sinrx * cxp + cosrx * cyp; - - // 4) Calculate theta1, and delta theta. - ux = (x1p - cxp) / rx; - uy = (y1p - cyp) / ry; - vx = (-x1p - cxp) / rx; - vy = (-y1p - cyp) / ry; - a1 = nsvg__vecang(1.0f, 0.0f, ux, uy); // Initial angle - da = nsvg__vecang(ux, uy, vx, vy); // Delta angle - - // if (vecrat(ux,uy,vx,vy) <= -1.0f) da = NSVG_PI; - // if (vecrat(ux,uy,vx,vy) >= 1.0f) da = 0; - - if (fs == 0 && da > 0) - da -= 2 * NSVG_PI; - else if (fs == 1 && da < 0) - da += 2 * NSVG_PI; - - // Approximate the arc using cubic spline segments. - t[0] = cosrx; - t[1] = sinrx; - t[2] = -sinrx; - t[3] = cosrx; - t[4] = cx; - t[5] = cy; - - // Split arc into max 90 degree segments. - // The loop assumes an iteration per end point (including start and end), this +1. - ndivs = (int)(fabsf(da) / (NSVG_PI * 0.5f) + 1.0f); - hda = (da / (float)ndivs) / 2.0f; - // Fix for ticket #179: division by 0: avoid cotangens around 0 (infinite) - if ((hda < 1e-3f) && (hda > -1e-3f)) - hda *= 0.5f; - else - hda = (1.0f - cosf(hda)) / sinf(hda); - kappa = fabsf(4.0f / 3.0f * hda); - if (da < 0.0f) - kappa = -kappa; - - for (i = 0; i <= ndivs; i++) { - a = a1 + da * ((float)i / (float)ndivs); - dx = cosf(a); - dy = sinf(a); - nsvg__xformPoint(&x, &y, dx * rx, dy * ry, t); // position - nsvg__xformVec(&tanx, &tany, -dy * rx * kappa, dx * ry * kappa, t); // tangent - if (i > 0) - nsvg__cubicBezTo(p, px + ptanx, py + ptany, x - tanx, y - tany, x, y); - px = x; - py = y; - ptanx = tanx; - ptany = tany; - } - - *cpx = x2; - *cpy = y2; -} - -static void nsvg__parsePath(NSVGparser *p, const char **attr) -{ - const char *s = NULL; - char cmd = '\0'; - float args[10]; - int nargs; - int rargs = 0; - char initPoint; - float cpx, cpy, cpx2, cpy2; - const char *tmp[4]; - char closedFlag; - int i; - char item[64]; - - for (i = 0; attr[i]; i += 2) { - if (strcmp(attr[i], "d") == 0) { - s = attr[i + 1]; - } else if (strcmp(attr[i], "unicode") == 0 && - strlen(attr[i + 1]) < NSVG_MAX_UNICODE_LEN) { - strcpy(p->unicodeFlag, attr[i + 1]); - } else if (strcmp(attr[i], "horiz-adv-x") == 0) { - p->horizAdvFlag = attr[i + 1]; - } else { - tmp[0] = attr[i]; - tmp[1] = attr[i + 1]; - tmp[2] = 0; - tmp[3] = 0; - nsvg__parseAttribs(p, tmp); - } - } - - if (s) { - nsvg__resetPath(p); - cpx = 0; - cpy = 0; - cpx2 = 0; - cpy2 = 0; - initPoint = 0; - closedFlag = 0; - nargs = 0; - - while (*s) { - s = nsvg__getNextPathItem(s, item); - if (!*item) - break; - if (cmd != '\0' && nsvg__isCoordinate(item)) { - if (nargs < 10) - args[nargs++] = (float)nsvg__atof(item); - if (nargs >= rargs) { - switch (cmd) { - case 'm': - case 'M': - nsvg__pathMoveTo(p, &cpx, &cpy, args, - cmd == 'm' ? 1 : 0); - // Moveto can be followed by multiple coordinate - // pairs, which should be treated as linetos. - cmd = (cmd == 'm') ? 'l' : 'L'; - rargs = nsvg__getArgsPerElement(cmd); - cpx2 = cpx; - cpy2 = cpy; - initPoint = 1; - break; - case 'l': - case 'L': - nsvg__pathLineTo(p, &cpx, &cpy, args, - cmd == 'l' ? 1 : 0); - cpx2 = cpx; - cpy2 = cpy; - break; - case 'H': - case 'h': - nsvg__pathHLineTo(p, &cpx, &cpy, args, - cmd == 'h' ? 1 : 0); - cpx2 = cpx; - cpy2 = cpy; - break; - case 'V': - case 'v': - nsvg__pathVLineTo(p, &cpx, &cpy, args, - cmd == 'v' ? 1 : 0); - cpx2 = cpx; - cpy2 = cpy; - break; - case 'C': - case 'c': - nsvg__pathCubicBezTo(p, &cpx, &cpy, &cpx2, &cpy2, - args, cmd == 'c' ? 1 : 0); - break; - case 'S': - case 's': - nsvg__pathCubicBezShortTo(p, &cpx, &cpy, &cpx2, - &cpy2, args, - cmd == 's' ? 1 : 0); - break; - case 'Q': - case 'q': - nsvg__pathQuadBezTo(p, &cpx, &cpy, &cpx2, &cpy2, - args, cmd == 'q' ? 1 : 0); - break; - case 'T': - case 't': - nsvg__pathQuadBezShortTo(p, &cpx, &cpy, &cpx2, - &cpy2, args, - cmd == 't' ? 1 : 0); - break; - case 'A': - case 'a': - nsvg__pathArcTo(p, &cpx, &cpy, args, - cmd == 'a' ? 1 : 0); - cpx2 = cpx; - cpy2 = cpy; - break; - default: - if (nargs >= 2) { - cpx = args[nargs - 2]; - cpy = args[nargs - 1]; - cpx2 = cpx; - cpy2 = cpy; - } - break; - } - nargs = 0; - } - } else { - cmd = item[0]; - if (cmd == 'M' || cmd == 'm') { - // Commit path. - if (p->npts > 0) - nsvg__addPath(p, closedFlag); - // Start new subpath. - nsvg__resetPath(p); - closedFlag = 0; - nargs = 0; - } else if (initPoint == 0) { - // Do not allow other commands until initial point has been - // set (moveTo called once). - cmd = '\0'; - } - if (cmd == 'Z' || cmd == 'z') { - closedFlag = 1; - // Commit path. - if (p->npts > 0) { - // Move current point to first point - cpx = p->pts[0]; - cpy = p->pts[1]; - cpx2 = cpx; - cpy2 = cpy; - nsvg__addPath(p, closedFlag); - } - // Start new subpath. - nsvg__resetPath(p); - nsvg__moveTo(p, cpx, cpy); - closedFlag = 0; - nargs = 0; - } - rargs = nsvg__getArgsPerElement(cmd); - if (rargs == -1) { - // Command not recognized - cmd = '\0'; - rargs = 0; - } - } - } - // Commit path. - if (p->npts) - nsvg__addPath(p, closedFlag); - } - - nsvg__addShape(p); -} - -static void nsvg__parseRect(NSVGparser *p, const char **attr) -{ - float x = 0.0f; - float y = 0.0f; - float w = 0.0f; - float h = 0.0f; - float rx = -1.0f; // marks not set - float ry = -1.0f; - int i; - - for (i = 0; attr[i]; i += 2) { - if (!nsvg__parseAttr(p, attr[i], attr[i + 1])) { - if (strcmp(attr[i], "x") == 0) - x = nsvg__parseCoordinate(p, attr[i + 1], nsvg__actualOrigX(p), - nsvg__actualWidth(p)); - if (strcmp(attr[i], "y") == 0) - y = nsvg__parseCoordinate(p, attr[i + 1], nsvg__actualOrigY(p), - nsvg__actualHeight(p)); - if (strcmp(attr[i], "width") == 0) - w = nsvg__parseCoordinate(p, attr[i + 1], 0.0f, - nsvg__actualWidth(p)); - if (strcmp(attr[i], "height") == 0) - h = nsvg__parseCoordinate(p, attr[i + 1], 0.0f, - nsvg__actualHeight(p)); - if (strcmp(attr[i], "rx") == 0) - rx = fabsf(nsvg__parseCoordinate(p, attr[i + 1], 0.0f, - nsvg__actualWidth(p))); - if (strcmp(attr[i], "ry") == 0) - ry = fabsf(nsvg__parseCoordinate(p, attr[i + 1], 0.0f, - nsvg__actualHeight(p))); - } - } - - if (rx < 0.0f && ry > 0.0f) - rx = ry; - if (ry < 0.0f && rx > 0.0f) - ry = rx; - if (rx < 0.0f) - rx = 0.0f; - if (ry < 0.0f) - ry = 0.0f; - if (rx > w / 2.0f) - rx = w / 2.0f; - if (ry > h / 2.0f) - ry = h / 2.0f; - - if (w != 0.0f && h != 0.0f) { - nsvg__resetPath(p); - - if (rx < 0.00001f || ry < 0.0001f) { - nsvg__moveTo(p, x, y); - nsvg__lineTo(p, x + w, y); - nsvg__lineTo(p, x + w, y + h); - nsvg__lineTo(p, x, y + h); - } else { - // Rounded rectangle - nsvg__moveTo(p, x + rx, y); - nsvg__lineTo(p, x + w - rx, y); - nsvg__cubicBezTo(p, x + w - rx * (1 - NSVG_KAPPA90), y, x + w, - y + ry * (1 - NSVG_KAPPA90), x + w, y + ry); - nsvg__lineTo(p, x + w, y + h - ry); - nsvg__cubicBezTo(p, x + w, y + h - ry * (1 - NSVG_KAPPA90), - x + w - rx * (1 - NSVG_KAPPA90), y + h, x + w - rx, y + h); - nsvg__lineTo(p, x + rx, y + h); - nsvg__cubicBezTo(p, x + rx * (1 - NSVG_KAPPA90), y + h, x, - y + h - ry * (1 - NSVG_KAPPA90), x, y + h - ry); - nsvg__lineTo(p, x, y + ry); - nsvg__cubicBezTo(p, x, y + ry * (1 - NSVG_KAPPA90), - x + rx * (1 - NSVG_KAPPA90), y, x + rx, y); - } - - nsvg__addPath(p, 1); - - nsvg__addShape(p); - } -} - -static void nsvg__parseCircle(NSVGparser *p, const char **attr) -{ - float cx = 0.0f; - float cy = 0.0f; - float r = 0.0f; - int i; - - for (i = 0; attr[i]; i += 2) { - if (!nsvg__parseAttr(p, attr[i], attr[i + 1])) { - if (strcmp(attr[i], "cx") == 0) - cx = nsvg__parseCoordinate(p, attr[i + 1], nsvg__actualOrigX(p), - nsvg__actualWidth(p)); - if (strcmp(attr[i], "cy") == 0) - cy = nsvg__parseCoordinate(p, attr[i + 1], nsvg__actualOrigY(p), - nsvg__actualHeight(p)); - if (strcmp(attr[i], "r") == 0) - r = fabsf(nsvg__parseCoordinate(p, attr[i + 1], 0.0f, - nsvg__actualLength(p))); - } - } - - if (r > 0.0f) { - nsvg__resetPath(p); - - nsvg__moveTo(p, cx + r, cy); - nsvg__cubicBezTo(p, cx + r, cy + r * NSVG_KAPPA90, cx + r * NSVG_KAPPA90, cy + r, - cx, cy + r); - nsvg__cubicBezTo(p, cx - r * NSVG_KAPPA90, cy + r, cx - r, cy + r * NSVG_KAPPA90, - cx - r, cy); - nsvg__cubicBezTo(p, cx - r, cy - r * NSVG_KAPPA90, cx - r * NSVG_KAPPA90, cy - r, - cx, cy - r); - nsvg__cubicBezTo(p, cx + r * NSVG_KAPPA90, cy - r, cx + r, cy - r * NSVG_KAPPA90, - cx + r, cy); - - nsvg__addPath(p, 1); - - nsvg__addShape(p); - } -} - -static void nsvg__parseEllipse(NSVGparser *p, const char **attr) -{ - float cx = 0.0f; - float cy = 0.0f; - float rx = 0.0f; - float ry = 0.0f; - int i; - - for (i = 0; attr[i]; i += 2) { - if (!nsvg__parseAttr(p, attr[i], attr[i + 1])) { - if (strcmp(attr[i], "cx") == 0) - cx = nsvg__parseCoordinate(p, attr[i + 1], nsvg__actualOrigX(p), - nsvg__actualWidth(p)); - if (strcmp(attr[i], "cy") == 0) - cy = nsvg__parseCoordinate(p, attr[i + 1], nsvg__actualOrigY(p), - nsvg__actualHeight(p)); - if (strcmp(attr[i], "rx") == 0) - rx = fabsf(nsvg__parseCoordinate(p, attr[i + 1], 0.0f, - nsvg__actualWidth(p))); - if (strcmp(attr[i], "ry") == 0) - ry = fabsf(nsvg__parseCoordinate(p, attr[i + 1], 0.0f, - nsvg__actualHeight(p))); - } - } - - if (rx > 0.0f && ry > 0.0f) { - - nsvg__resetPath(p); - - nsvg__moveTo(p, cx + rx, cy); - nsvg__cubicBezTo(p, cx + rx, cy + ry * NSVG_KAPPA90, cx + rx * NSVG_KAPPA90, - cy + ry, cx, cy + ry); - nsvg__cubicBezTo(p, cx - rx * NSVG_KAPPA90, cy + ry, cx - rx, - cy + ry * NSVG_KAPPA90, cx - rx, cy); - nsvg__cubicBezTo(p, cx - rx, cy - ry * NSVG_KAPPA90, cx - rx * NSVG_KAPPA90, - cy - ry, cx, cy - ry); - nsvg__cubicBezTo(p, cx + rx * NSVG_KAPPA90, cy - ry, cx + rx, - cy - ry * NSVG_KAPPA90, cx + rx, cy); - - nsvg__addPath(p, 1); - - nsvg__addShape(p); - } -} - -static void nsvg__parseLine(NSVGparser *p, const char **attr) -{ - float x1 = 0.0; - float y1 = 0.0; - float x2 = 0.0; - float y2 = 0.0; - int i; - - for (i = 0; attr[i]; i += 2) { - if (!nsvg__parseAttr(p, attr[i], attr[i + 1])) { - if (strcmp(attr[i], "x1") == 0) - x1 = nsvg__parseCoordinate(p, attr[i + 1], nsvg__actualOrigX(p), - nsvg__actualWidth(p)); - if (strcmp(attr[i], "y1") == 0) - y1 = nsvg__parseCoordinate(p, attr[i + 1], nsvg__actualOrigY(p), - nsvg__actualHeight(p)); - if (strcmp(attr[i], "x2") == 0) - x2 = nsvg__parseCoordinate(p, attr[i + 1], nsvg__actualOrigX(p), - nsvg__actualWidth(p)); - if (strcmp(attr[i], "y2") == 0) - y2 = nsvg__parseCoordinate(p, attr[i + 1], nsvg__actualOrigY(p), - nsvg__actualHeight(p)); - } - } - - nsvg__resetPath(p); - - nsvg__moveTo(p, x1, y1); - nsvg__lineTo(p, x2, y2); - - nsvg__addPath(p, 0); - - nsvg__addShape(p); -} - -static void nsvg__parsePoly(NSVGparser *p, const char **attr, int closeFlag) -{ - int i; - const char *s; - float args[2]; - int nargs, npts = 0; - char item[64]; - - nsvg__resetPath(p); - - for (i = 0; attr[i]; i += 2) { - if (!nsvg__parseAttr(p, attr[i], attr[i + 1])) { - if (strcmp(attr[i], "points") == 0) { - s = attr[i + 1]; - nargs = 0; - while (*s) { - s = nsvg__getNextPathItem(s, item); - args[nargs++] = (float)nsvg__atof(item); - if (nargs >= 2) { - if (npts == 0) - nsvg__moveTo(p, args[0], args[1]); - else - nsvg__lineTo(p, args[0], args[1]); - nargs = 0; - npts++; - } - } - } - } - } - - nsvg__addPath(p, (char)closeFlag); - - nsvg__addShape(p); -} - -static void nsvg__parseSVG(NSVGparser *p, const char **attr) -{ - int i; - for (i = 0; attr[i]; i += 2) { - if (!nsvg__parseAttr(p, attr[i], attr[i + 1])) { - if (strcmp(attr[i], "width") == 0) { - p->image->width = nsvg__parseCoordinate(p, attr[i + 1], 0.0f, 0.0f); - } else if (strcmp(attr[i], "height") == 0) { - p->image->height = - nsvg__parseCoordinate(p, attr[i + 1], 0.0f, 0.0f); - } else if (strcmp(attr[i], "viewBox") == 0) { - const char *s = attr[i + 1]; - char buf[64]; - s = nsvg__parseNumber(s, buf, 64); - p->viewMinx = nsvg__atof(buf); - while (*s && (nsvg__isspace(*s) || *s == '%' || *s == ',')) - s++; - if (!*s) - return; - s = nsvg__parseNumber(s, buf, 64); - p->viewMiny = nsvg__atof(buf); - while (*s && (nsvg__isspace(*s) || *s == '%' || *s == ',')) - s++; - if (!*s) - return; - s = nsvg__parseNumber(s, buf, 64); - p->viewWidth = nsvg__atof(buf); - while (*s && (nsvg__isspace(*s) || *s == '%' || *s == ',')) - s++; - if (!*s) - return; - s = nsvg__parseNumber(s, buf, 64); - p->viewHeight = nsvg__atof(buf); - } else if (strcmp(attr[i], "preserveAspectRatio") == 0) { - if (strstr(attr[i + 1], "none") != 0) { - // No uniform scaling - p->alignType = NSVG_ALIGN_NONE; - } else { - // Parse X align - if (strstr(attr[i + 1], "xMin") != 0) - p->alignX = NSVG_ALIGN_MIN; - else if (strstr(attr[i + 1], "xMid") != 0) - p->alignX = NSVG_ALIGN_MID; - else if (strstr(attr[i + 1], "xMax") != 0) - p->alignX = NSVG_ALIGN_MAX; - // Parse X align - if (strstr(attr[i + 1], "yMin") != 0) - p->alignY = NSVG_ALIGN_MIN; - else if (strstr(attr[i + 1], "yMid") != 0) - p->alignY = NSVG_ALIGN_MID; - else if (strstr(attr[i + 1], "yMax") != 0) - p->alignY = NSVG_ALIGN_MAX; - // Parse meet/slice - p->alignType = NSVG_ALIGN_MEET; - if (strstr(attr[i + 1], "slice") != 0) - p->alignType = NSVG_ALIGN_SLICE; - } - } - } - } -} - -static void nsvg__parseGradient(NSVGparser *p, const char **attr, char type) -{ - int i; - NSVGgradientData *grad = (NSVGgradientData *)malloc(sizeof(NSVGgradientData)); - if (grad == NULL) - return; - memset(grad, 0, sizeof(NSVGgradientData)); - grad->units = NSVG_OBJECT_SPACE; - grad->type = type; - if (grad->type == NSVG_PAINT_LINEAR_GRADIENT) { - grad->linear.x1 = nsvg__coord(0.0f, NSVG_UNITS_PERCENT); - grad->linear.y1 = nsvg__coord(0.0f, NSVG_UNITS_PERCENT); - grad->linear.x2 = nsvg__coord(100.0f, NSVG_UNITS_PERCENT); - grad->linear.y2 = nsvg__coord(0.0f, NSVG_UNITS_PERCENT); - } else if (grad->type == NSVG_PAINT_RADIAL_GRADIENT) { - grad->radial.cx = nsvg__coord(50.0f, NSVG_UNITS_PERCENT); - grad->radial.cy = nsvg__coord(50.0f, NSVG_UNITS_PERCENT); - grad->radial.r = nsvg__coord(50.0f, NSVG_UNITS_PERCENT); - } - - nsvg__xformIdentity(grad->xform); - - for (i = 0; attr[i]; i += 2) { - if (strcmp(attr[i], "id") == 0) { - strncpy(grad->id, attr[i + 1], 63); - grad->id[63] = '\0'; - } else if (!nsvg__parseAttr(p, attr[i], attr[i + 1])) { - if (strcmp(attr[i], "gradientUnits") == 0) { - if (strcmp(attr[i + 1], "objectBoundingBox") == 0) - grad->units = NSVG_OBJECT_SPACE; - else - grad->units = NSVG_USER_SPACE; - } else if (strcmp(attr[i], "gradientTransform") == 0) { - nsvg__parseTransform(grad->xform, attr[i + 1]); - } else if (strcmp(attr[i], "cx") == 0) { - grad->radial.cx = nsvg__parseCoordinateRaw(attr[i + 1]); - } else if (strcmp(attr[i], "cy") == 0) { - grad->radial.cy = nsvg__parseCoordinateRaw(attr[i + 1]); - } else if (strcmp(attr[i], "r") == 0) { - grad->radial.r = nsvg__parseCoordinateRaw(attr[i + 1]); - } else if (strcmp(attr[i], "fx") == 0) { - grad->radial.fx = nsvg__parseCoordinateRaw(attr[i + 1]); - } else if (strcmp(attr[i], "fy") == 0) { - grad->radial.fy = nsvg__parseCoordinateRaw(attr[i + 1]); - } else if (strcmp(attr[i], "x1") == 0) { - grad->linear.x1 = nsvg__parseCoordinateRaw(attr[i + 1]); - } else if (strcmp(attr[i], "y1") == 0) { - grad->linear.y1 = nsvg__parseCoordinateRaw(attr[i + 1]); - } else if (strcmp(attr[i], "x2") == 0) { - grad->linear.x2 = nsvg__parseCoordinateRaw(attr[i + 1]); - } else if (strcmp(attr[i], "y2") == 0) { - grad->linear.y2 = nsvg__parseCoordinateRaw(attr[i + 1]); - } else if (strcmp(attr[i], "spreadMethod") == 0) { - if (strcmp(attr[i + 1], "pad") == 0) - grad->spread = NSVG_SPREAD_PAD; - else if (strcmp(attr[i + 1], "reflect") == 0) - grad->spread = NSVG_SPREAD_REFLECT; - else if (strcmp(attr[i + 1], "repeat") == 0) - grad->spread = NSVG_SPREAD_REPEAT; - } else if (strcmp(attr[i], "xlink:href") == 0) { - const char *href = attr[i + 1]; - strncpy(grad->ref, href + 1, 62); - grad->ref[62] = '\0'; - } - } - } - - grad->next = p->gradients; - p->gradients = grad; -} - -static void nsvg__parseGradientStop(NSVGparser *p, const char **attr) -{ - NSVGattrib *curAttr = nsvg__getAttr(p); - NSVGgradientData *grad; - NSVGgradientStop *stop; - int i, idx; - - curAttr->stopOffset = 0; - curAttr->stopColor = 0; - curAttr->stopOpacity = 1.0f; - - for (i = 0; attr[i]; i += 2) { - nsvg__parseAttr(p, attr[i], attr[i + 1]); - } - - // Add stop to the last gradient. - grad = p->gradients; - if (grad == NULL) - return; - - grad->nstops++; - grad->stops = - (NSVGgradientStop *)realloc(grad->stops, sizeof(NSVGgradientStop) * grad->nstops); - if (grad->stops == NULL) - return; - - // Insert - idx = grad->nstops - 1; - for (i = 0; i < grad->nstops - 1; i++) { - if (curAttr->stopOffset < grad->stops[i].offset) { - idx = i; - break; - } - } - if (idx != grad->nstops - 1) { - for (i = grad->nstops - 1; i > idx; i--) - grad->stops[i] = grad->stops[i - 1]; - } - - stop = &grad->stops[idx]; - stop->color = curAttr->stopColor; - stop->color |= (unsigned int)(curAttr->stopOpacity * 255) << 24; - stop->offset = curAttr->stopOffset; -} - -static void nsvg__startElement(void *ud, const char *el, const char **attr) -{ - NSVGparser *p = (NSVGparser *)ud; - - if (p->defsFlag) { - // Skip everything but gradients and fonts in defs - if (strcmp(el, "linearGradient") == 0) { - nsvg__parseGradient(p, attr, NSVG_PAINT_LINEAR_GRADIENT); - } else if (strcmp(el, "radialGradient") == 0) { - nsvg__parseGradient(p, attr, NSVG_PAINT_RADIAL_GRADIENT); - } else if (strcmp(el, "stop") == 0) { - nsvg__parseGradientStop(p, attr); - } else if (strcmp(el, "glyph") == 0) { // glyphs are just special paths - if (p->pathFlag) // Do not allow nested paths. - return; - nsvg__pushAttr(p); - nsvg__parsePath(p, attr); - nsvg__popAttr(p); - } else if (strcmp(el, "font") == 0) { // fonts are special "g" tags - nsvg__pushAttr(p); - nsvg__parseAttribs(p, attr); - } else if (strcmp(el, "font-face") == 0) { // for the default character width - nsvg__pushAttr(p); - nsvg__parseAttribs(p, attr); - } - return; - } - - if (strcmp(el, "g") == 0) { - nsvg__pushAttr(p); - nsvg__parseAttribs(p, attr); - } else if (strcmp(el, "path") == 0) { - if (p->pathFlag) // Do not allow nested paths. - return; - nsvg__pushAttr(p); - nsvg__parsePath(p, attr); - nsvg__popAttr(p); - } else if (strcmp(el, "rect") == 0) { - nsvg__pushAttr(p); - nsvg__parseRect(p, attr); - nsvg__popAttr(p); - } else if (strcmp(el, "circle") == 0) { - nsvg__pushAttr(p); - nsvg__parseCircle(p, attr); - nsvg__popAttr(p); - } else if (strcmp(el, "ellipse") == 0) { - nsvg__pushAttr(p); - nsvg__parseEllipse(p, attr); - nsvg__popAttr(p); - } else if (strcmp(el, "line") == 0) { - nsvg__pushAttr(p); - nsvg__parseLine(p, attr); - nsvg__popAttr(p); - } else if (strcmp(el, "polyline") == 0) { - nsvg__pushAttr(p); - nsvg__parsePoly(p, attr, 0); - nsvg__popAttr(p); - } else if (strcmp(el, "polygon") == 0) { - nsvg__pushAttr(p); - nsvg__parsePoly(p, attr, 1); - nsvg__popAttr(p); - } else if (strcmp(el, "linearGradient") == 0) { - nsvg__parseGradient(p, attr, NSVG_PAINT_LINEAR_GRADIENT); - } else if (strcmp(el, "radialGradient") == 0) { - nsvg__parseGradient(p, attr, NSVG_PAINT_RADIAL_GRADIENT); - } else if (strcmp(el, "stop") == 0) { - nsvg__parseGradientStop(p, attr); - } else if (strcmp(el, "defs") == 0) { - p->defsFlag = 1; - } else if (strcmp(el, "svg") == 0) { - nsvg__parseSVG(p, attr); - } -} - -static void nsvg__endElement(void *ud, const char *el) -{ - NSVGparser *p = (NSVGparser *)ud; - - if (strcmp(el, "g") == 0) { - nsvg__popAttr(p); - } else if (strcmp(el, "path") == 0) { - p->pathFlag = 0; - } else if (strcmp(el, "defs") == 0) { - p->defsFlag = 0; - } -} - -static void nsvg__content(void *ud, const char *s) -{ - NSVG_NOTUSED(ud); - NSVG_NOTUSED(s); - // empty -} - -static void nsvg__imageBounds(NSVGparser *p, float *bounds) -{ - NSVGshape *shape; - shape = p->image->shapes; - if (shape == NULL) { - bounds[0] = bounds[1] = bounds[2] = bounds[3] = 0.0; - return; - } - bounds[0] = shape->bounds[0]; - bounds[1] = shape->bounds[1]; - bounds[2] = shape->bounds[2]; - bounds[3] = shape->bounds[3]; - for (shape = shape->next; shape != NULL; shape = shape->next) { - bounds[0] = nsvg__minf(bounds[0], shape->bounds[0]); - bounds[1] = nsvg__minf(bounds[1], shape->bounds[1]); - bounds[2] = nsvg__maxf(bounds[2], shape->bounds[2]); - bounds[3] = nsvg__maxf(bounds[3], shape->bounds[3]); - } -} - -static float nsvg__viewAlign(float content, float container, int type) -{ - if (type == NSVG_ALIGN_MIN) - return 0; - else if (type == NSVG_ALIGN_MAX) - return container - content; - // mid - return (container - content) * 0.5f; -} - -static void nsvg__scaleGradient(NSVGgradient *grad, float tx, float ty, float sx, float sy) -{ - float t[6]; - nsvg__xformSetTranslation(t, tx, ty); - nsvg__xformMultiply(grad->xform, t); - - nsvg__xformSetScale(t, sx, sy); - nsvg__xformMultiply(grad->xform, t); -} - -static void nsvg__scaleToViewbox(NSVGparser *p, const char *units) -{ - NSVGshape *shape; - NSVGpath *path; - float tx, ty, sx, sy, us, bounds[4], t[6], avgs; - int i; - float *pt; - - // Guess image size if not set completely. - nsvg__imageBounds(p, bounds); - - if (p->viewWidth == 0) { - if (p->image->width > 0) { - p->viewWidth = p->image->width; - } else { - p->viewMinx = bounds[0]; - p->viewWidth = bounds[2] - bounds[0]; - } - } - if (p->viewHeight == 0) { - if (p->image->height > 0) { - p->viewHeight = p->image->height; - } else { - p->viewMiny = bounds[1]; - p->viewHeight = bounds[3] - bounds[1]; - } - } - if (p->image->width == 0) - p->image->width = p->viewWidth; - if (p->image->height == 0) - p->image->height = p->viewHeight; - - tx = -p->viewMinx; - ty = -p->viewMiny; - sx = p->viewWidth > 0 ? p->image->width / p->viewWidth : 0; - sy = p->viewHeight > 0 ? p->image->height / p->viewHeight : 0; - // Unit scaling - us = 1.0f / - nsvg__convertToPixels(p, nsvg__coord(1.0f, nsvg__parseUnits(units)), 0.0f, 1.0f); - - // Fix aspect ratio - if (p->alignType == NSVG_ALIGN_MEET) { - // fit whole image into viewbox - sx = sy = nsvg__minf(sx, sy); - tx += nsvg__viewAlign(p->viewWidth * sx, p->image->width, p->alignX) / sx; - ty += nsvg__viewAlign(p->viewHeight * sy, p->image->height, p->alignY) / sy; - } else if (p->alignType == NSVG_ALIGN_SLICE) { - // fill whole viewbox with image - sx = sy = nsvg__maxf(sx, sy); - tx += nsvg__viewAlign(p->viewWidth * sx, p->image->width, p->alignX) / sx; - ty += nsvg__viewAlign(p->viewHeight * sy, p->image->height, p->alignY) / sy; - } - - // Transform - sx *= us; - sy *= us; - avgs = (sx + sy) / 2.0f; - for (shape = p->image->shapes; shape != NULL; shape = shape->next) { - shape->bounds[0] = (shape->bounds[0] + tx) * sx; - shape->bounds[1] = (shape->bounds[1] + ty) * sy; - shape->bounds[2] = (shape->bounds[2] + tx) * sx; - shape->bounds[3] = (shape->bounds[3] + ty) * sy; - for (path = shape->paths; path != NULL; path = path->next) { - path->bounds[0] = (path->bounds[0] + tx) * sx; - path->bounds[1] = (path->bounds[1] + ty) * sy; - path->bounds[2] = (path->bounds[2] + tx) * sx; - path->bounds[3] = (path->bounds[3] + ty) * sy; - for (i = 0; i < path->npts; i++) { - pt = &path->pts[i * 2]; - pt[0] = (pt[0] + tx) * sx; - pt[1] = (pt[1] + ty) * sy; - } - } - - if (shape->fill.type == NSVG_PAINT_LINEAR_GRADIENT || - shape->fill.type == NSVG_PAINT_RADIAL_GRADIENT) { - nsvg__scaleGradient(shape->fill.gradient, tx, ty, sx, sy); - memcpy(t, shape->fill.gradient->xform, sizeof(float) * 6); - nsvg__xformInverse(shape->fill.gradient->xform, t); - } - if (shape->stroke.type == NSVG_PAINT_LINEAR_GRADIENT || - shape->stroke.type == NSVG_PAINT_RADIAL_GRADIENT) { - nsvg__scaleGradient(shape->stroke.gradient, tx, ty, sx, sy); - memcpy(t, shape->stroke.gradient->xform, sizeof(float) * 6); - nsvg__xformInverse(shape->stroke.gradient->xform, t); - } - - shape->strokeWidth *= avgs; - shape->strokeDashOffset *= avgs; - for (i = 0; i < shape->strokeDashCount; i++) - shape->strokeDashArray[i] *= avgs; - } -} - -NSVGshape **nsvgGetTextShapes(const NSVGimage *image, const char *text, int textLen) -{ - NSVGshape *shape = NULL; - NSVGshape **ret = calloc(textLen, sizeof(shape)); // array of paths, text to render - int i; - - // make list of paths representing glyphs to render - for (i = 0; i < textLen; i++) { - if (text[i] == ' ' || text[i] == '\n') { - ret[i] = NULL; - continue; - } - for (shape = image->shapes; shape != NULL; shape = shape->next) { - if (!(shape->flags & NSVG_FLAGS_VISIBLE)) - continue; - if (shape->unicode[0] == text[i]) { - ret[i] = shape; - goto found; - } - } - found: - continue; - } - - return ret; -} - -NSVGimage *nsvgParse(char *input, const char *units, float dpi) -{ - NSVGparser *p; - NSVGimage *ret = 0; - - p = nsvg__createParser(); - if (p == NULL) { - return NULL; - } - p->dpi = dpi; - - nsvg__parseXML(input, nsvg__startElement, nsvg__endElement, nsvg__content, p); - - // Scale to viewBox - nsvg__scaleToViewbox(p, units); - - ret = p->image; - p->image = NULL; - - nsvg__deleteParser(p); - - return ret; -} - -NSVGimage *nsvgParseFromFile(const char *filename, const char *units, float dpi) -{ - FILE *fp = NULL; - size_t size; - char *data = NULL; - NSVGimage *image = NULL; - - fp = fopen(filename, "rb"); - if (!fp) - goto error; - fseek(fp, 0, SEEK_END); - size = ftell(fp); - fseek(fp, 0, SEEK_SET); - data = (char *)malloc(size + 1); - if (data == NULL) - goto error; - if (fread(data, 1, size, fp) != size) - goto error; - data[size] = '\0'; // Must be null terminated. - fclose(fp); - image = nsvgParse(data, units, dpi); - free(data); - - return image; - -error: - if (fp) - fclose(fp); - if (data) - free(data); - nsvgDelete(image); - return NULL; -} - -NSVGpath *nsvgDuplicatePath(NSVGpath *p) -{ - NSVGpath *res = NULL; - - if (p == NULL) - return NULL; - - res = (NSVGpath *)malloc(sizeof(NSVGpath)); - if (res == NULL) - goto error; - memset(res, 0, sizeof(NSVGpath)); - - res->pts = (float *)malloc(p->npts * 2 * sizeof(float)); - if (res->pts == NULL) - goto error; - memcpy(res->pts, p->pts, p->npts * sizeof(float) * 2); - res->npts = p->npts; - - memcpy(res->bounds, p->bounds, sizeof(p->bounds)); - - res->closed = p->closed; - - return res; - -error: - if (res != NULL) { - free(res->pts); - free(res); - } - return NULL; -} - -void nsvgDelete(NSVGimage *image) -{ - NSVGshape *snext, *shape; - if (image == NULL) - return; - shape = image->shapes; - while (shape != NULL) { - snext = shape->next; - nsvg__deletePaths(shape->paths); - nsvg__deletePaint(&shape->fill); - nsvg__deletePaint(&shape->stroke); - free(shape); - shape = snext; - } - free(image); -} - -#endif diff --git a/include/nanosvgrast.h b/include/nanosvgrast.h deleted file mode 100644 index 3b7b311..0000000 --- a/include/nanosvgrast.h +++ /dev/null @@ -1,1659 +0,0 @@ -/* - * Copyright (c) 2013-14 Mikko Mononen memon@inside.org - * - * This software is provided 'as-is', without any express or implied - * warranty. In no event will the authors be held liable for any damages - * arising from the use of this software. - * - * Permission is granted to anyone to use this software for any purpose, - * including commercial applications, and to alter it and redistribute it - * freely, subject to the following restrictions: - * - * 1. The origin of this software must not be misrepresented; you must not - * claim that you wrote the original software. If you use this software - * in a product, an acknowledgment in the product documentation would be - * appreciated but is not required. - * 2. Altered source versions must be plainly marked as such, and must not be - * misrepresented as being the original software. - * 3. This notice may not be removed or altered from any source distribution. - * - * The polygon rasterization is heavily based on stb_truetype rasterizer - * by Sean Barrett - http://nothings.org/ - * - */ - -#ifndef NANOSVGRAST_H -#define NANOSVGRAST_H - -#ifndef NANOSVGRAST_CPLUSPLUS -#ifdef __cplusplus -extern "C" { -#endif -#endif - -typedef struct NSVGrasterizer NSVGrasterizer; - -/* Example Usage: - // Load SVG - NSVGimage* image; - image = nsvgParseFromFile("test.svg", "px", 96); - - // Create rasterizer (can be used to render multiple images). - struct NSVGrasterizer* rast = nsvgCreateRasterizer(); - // Allocate memory for image - unsigned char* img = malloc(w*h*4); - // Rasterize - nsvgRasterize(rast, image, 0,0,1, img, w, h, w*4); -*/ - -// Allocated rasterizer context. -NSVGrasterizer *nsvgCreateRasterizer(); - -// Rasterizes SVG image, returns RGBA image (non-premultiplied alpha) -// r - pointer to rasterizer context -// image - pointer to image to rasterize -// tx,ty - image offset (applied after scaling) -// scale - image scale -// dst - pointer to destination image data, 4 bytes per pixel (RGBA) -// w - width of the image to render -// h - height of the image to render -// stride - number of bytes per scaleline in the destination buffer -void nsvgRasterize(NSVGrasterizer *r, NSVGimage *image, float tx, float ty, float scale, - unsigned char *dst, int w, int h, int stride); - -// Deletes rasterizer context. -void nsvgDeleteRasterizer(NSVGrasterizer *); - -void nsvgRasterizeText(NSVGrasterizer *r, const NSVGimage *font, float tx, float ty, float scale, - unsigned char *dst, int w, int h, int stride, const char *text); - -#ifndef NANOSVGRAST_CPLUSPLUS -#ifdef __cplusplus -} -#endif -#endif - -#endif // NANOSVGRAST_H - -#ifdef NANOSVGRAST_IMPLEMENTATION - -#include - -#define NSVG__SUBSAMPLES 5 -#define NSVG__FIXSHIFT 10 -#define NSVG__FIX (1 << NSVG__FIXSHIFT) -#define NSVG__FIXMASK (NSVG__FIX - 1) -#define NSVG__MEMPAGE_SIZE 1024 - -typedef struct NSVGedge { - float x0, y0, x1, y1; - int dir; - struct NSVGedge *next; -} NSVGedge; - -typedef struct NSVGpoint { - float x, y; - float dx, dy; - float len; - float dmx, dmy; - unsigned char flags; -} NSVGpoint; - -typedef struct NSVGactiveEdge { - int x, dx; - float ey; - int dir; - struct NSVGactiveEdge *next; -} NSVGactiveEdge; - -typedef struct NSVGmemPage { - unsigned char mem[NSVG__MEMPAGE_SIZE]; - int size; - struct NSVGmemPage *next; -} NSVGmemPage; - -typedef struct NSVGcachedPaint { - char type; - char spread; - float xform[6]; - unsigned int colors[256]; -} NSVGcachedPaint; - -struct NSVGrasterizer { - float px, py; - - float tessTol; - float distTol; - - NSVGedge *edges; - int nedges; - int cedges; - - NSVGpoint *points; - int npoints; - int cpoints; - - NSVGpoint *points2; - int npoints2; - int cpoints2; - - NSVGactiveEdge *freelist; - NSVGmemPage *pages; - NSVGmemPage *curpage; - - unsigned char *scanline; - int cscanline; - - unsigned char *bitmap; - int width, height, stride; -}; - -NSVGrasterizer *nsvgCreateRasterizer() -{ - NSVGrasterizer *r = (NSVGrasterizer *)malloc(sizeof(NSVGrasterizer)); - if (r == NULL) - goto error; - memset(r, 0, sizeof(NSVGrasterizer)); - - r->tessTol = 0.25f; - r->distTol = 0.01f; - - return r; - -error: - nsvgDeleteRasterizer(r); - return NULL; -} - -void nsvgDeleteRasterizer(NSVGrasterizer *r) -{ - NSVGmemPage *p; - - if (r == NULL) - return; - - p = r->pages; - while (p != NULL) { - NSVGmemPage *next = p->next; - free(p); - p = next; - } - - if (r->edges) - free(r->edges); - if (r->points) - free(r->points); - if (r->points2) - free(r->points2); - if (r->scanline) - free(r->scanline); - - free(r); -} - -static NSVGmemPage *nsvg__nextPage(NSVGrasterizer *r, NSVGmemPage *cur) -{ - NSVGmemPage *newp; - - // If using existing chain, return the next page in chain - if (cur != NULL && cur->next != NULL) { - return cur->next; - } - - // Alloc new page - newp = (NSVGmemPage *)malloc(sizeof(NSVGmemPage)); - if (newp == NULL) - return NULL; - memset(newp, 0, sizeof(NSVGmemPage)); - - // Add to linked list - if (cur != NULL) - cur->next = newp; - else - r->pages = newp; - - return newp; -} - -static void nsvg__resetPool(NSVGrasterizer *r) -{ - NSVGmemPage *p = r->pages; - while (p != NULL) { - p->size = 0; - p = p->next; - } - r->curpage = r->pages; -} - -static unsigned char *nsvg__alloc(NSVGrasterizer *r, int size) -{ - unsigned char *buf; - if (size > NSVG__MEMPAGE_SIZE) - return NULL; - if (r->curpage == NULL || r->curpage->size + size > NSVG__MEMPAGE_SIZE) { - r->curpage = nsvg__nextPage(r, r->curpage); - } - buf = &r->curpage->mem[r->curpage->size]; - r->curpage->size += size; - return buf; -} - -static int nsvg__ptEquals(float x1, float y1, float x2, float y2, float tol) -{ - float dx = x2 - x1; - float dy = y2 - y1; - return dx * dx + dy * dy < tol * tol; -} - -static void nsvg__addPathPoint(NSVGrasterizer *r, float x, float y, int flags) -{ - NSVGpoint *pt; - - if (r->npoints > 0) { - pt = &r->points[r->npoints - 1]; - if (nsvg__ptEquals(pt->x, pt->y, x, y, r->distTol)) { - pt->flags = (unsigned char)(pt->flags | flags); - return; - } - } - - if (r->npoints + 1 > r->cpoints) { - r->cpoints = r->cpoints > 0 ? r->cpoints * 2 : 64; - r->points = (NSVGpoint *)realloc(r->points, sizeof(NSVGpoint) * r->cpoints); - if (r->points == NULL) - return; - } - - pt = &r->points[r->npoints]; - pt->x = x; - pt->y = y; - pt->flags = (unsigned char)flags; - r->npoints++; -} - -static void nsvg__appendPathPoint(NSVGrasterizer *r, NSVGpoint pt) -{ - if (r->npoints + 1 > r->cpoints) { - r->cpoints = r->cpoints > 0 ? r->cpoints * 2 : 64; - r->points = (NSVGpoint *)realloc(r->points, sizeof(NSVGpoint) * r->cpoints); - if (r->points == NULL) - return; - } - r->points[r->npoints] = pt; - r->npoints++; -} - -static void nsvg__duplicatePoints(NSVGrasterizer *r) -{ - if (r->npoints > r->cpoints2) { - r->cpoints2 = r->npoints; - r->points2 = (NSVGpoint *)realloc(r->points2, sizeof(NSVGpoint) * r->cpoints2); - if (r->points2 == NULL) - return; - } - - memcpy(r->points2, r->points, sizeof(NSVGpoint) * r->npoints); - r->npoints2 = r->npoints; -} - -static void nsvg__addEdge(NSVGrasterizer *r, float x0, float y0, float x1, float y1) -{ - NSVGedge *e; - - // Skip horizontal edges - if (y0 == y1) - return; - - if (r->nedges + 1 > r->cedges) { - r->cedges = r->cedges > 0 ? r->cedges * 2 : 64; - r->edges = (NSVGedge *)realloc(r->edges, sizeof(NSVGedge) * r->cedges); - if (r->edges == NULL) - return; - } - - e = &r->edges[r->nedges]; - r->nedges++; - - if (y0 < y1) { - e->x0 = x0; - e->y0 = y0; - e->x1 = x1; - e->y1 = y1; - e->dir = 1; - } else { - e->x0 = x1; - e->y0 = y1; - e->x1 = x0; - e->y1 = y0; - e->dir = -1; - } -} - -static float nsvg__normalize(float *x, float *y) -{ - float d = sqrtf((*x) * (*x) + (*y) * (*y)); - if (d > 1e-6f) { - float id = 1.0f / d; - *x *= id; - *y *= id; - } - return d; -} - -static float nsvg__absf(float x) -{ - return x < 0 ? -x : x; -} - -static void nsvg__flattenCubicBez(NSVGrasterizer *r, float x1, float y1, float x2, float y2, - float x3, float y3, float x4, float y4, int level, int type) -{ - float x12, y12, x23, y23, x34, y34, x123, y123, x234, y234, x1234, y1234; - float dx, dy, d2, d3; - - if (level > 10) - return; - - x12 = (x1 + x2) * 0.5f; - y12 = (y1 + y2) * 0.5f; - x23 = (x2 + x3) * 0.5f; - y23 = (y2 + y3) * 0.5f; - x34 = (x3 + x4) * 0.5f; - y34 = (y3 + y4) * 0.5f; - x123 = (x12 + x23) * 0.5f; - y123 = (y12 + y23) * 0.5f; - - dx = x4 - x1; - dy = y4 - y1; - d2 = nsvg__absf(((x2 - x4) * dy - (y2 - y4) * dx)); - d3 = nsvg__absf(((x3 - x4) * dy - (y3 - y4) * dx)); - - if ((d2 + d3) * (d2 + d3) < r->tessTol * (dx * dx + dy * dy)) { - nsvg__addPathPoint(r, x4, y4, type); - return; - } - - x234 = (x23 + x34) * 0.5f; - y234 = (y23 + y34) * 0.5f; - x1234 = (x123 + x234) * 0.5f; - y1234 = (y123 + y234) * 0.5f; - - nsvg__flattenCubicBez(r, x1, y1, x12, y12, x123, y123, x1234, y1234, level + 1, 0); - nsvg__flattenCubicBez(r, x1234, y1234, x234, y234, x34, y34, x4, y4, level + 1, type); -} - -static void nsvg__flattenShape(NSVGrasterizer *r, NSVGshape *shape, float scale) -{ - int i, j; - NSVGpath *path; - - for (path = shape->paths; path != NULL; path = path->next) { - r->npoints = 0; - // Flatten path - nsvg__addPathPoint(r, path->pts[0] * scale, path->pts[1] * scale, 0); - for (i = 0; i < path->npts - 1; i += 3) { - float *p = &path->pts[i * 2]; - nsvg__flattenCubicBez(r, p[0] * scale, p[1] * scale, p[2] * scale, - p[3] * scale, p[4] * scale, p[5] * scale, - p[6] * scale, p[7] * scale, 0, 0); - } - // Close path - nsvg__addPathPoint(r, path->pts[0] * scale, path->pts[1] * scale, 0); - // Build edges - for (i = 0, j = r->npoints - 1; i < r->npoints; j = i++) - nsvg__addEdge(r, r->points[j].x, r->points[j].y, r->points[i].x, - r->points[i].y); - } -} - -enum NSVGpointFlags { NSVG_PT_CORNER = 0x01, NSVG_PT_BEVEL = 0x02, NSVG_PT_LEFT = 0x04 }; - -static void nsvg__initClosed(NSVGpoint *left, NSVGpoint *right, NSVGpoint *p0, NSVGpoint *p1, - float lineWidth) -{ - float w = lineWidth * 0.5f; - float dx = p1->x - p0->x; - float dy = p1->y - p0->y; - float len = nsvg__normalize(&dx, &dy); - float px = p0->x + dx * len * 0.5f, py = p0->y + dy * len * 0.5f; - float dlx = dy, dly = -dx; - float lx = px - dlx * w, ly = py - dly * w; - float rx = px + dlx * w, ry = py + dly * w; - left->x = lx; - left->y = ly; - right->x = rx; - right->y = ry; -} - -static void nsvg__buttCap(NSVGrasterizer *r, NSVGpoint *left, NSVGpoint *right, NSVGpoint *p, - float dx, float dy, float lineWidth, int connect) -{ - float w = lineWidth * 0.5f; - float px = p->x, py = p->y; - float dlx = dy, dly = -dx; - float lx = px - dlx * w, ly = py - dly * w; - float rx = px + dlx * w, ry = py + dly * w; - - nsvg__addEdge(r, lx, ly, rx, ry); - - if (connect) { - nsvg__addEdge(r, left->x, left->y, lx, ly); - nsvg__addEdge(r, rx, ry, right->x, right->y); - } - left->x = lx; - left->y = ly; - right->x = rx; - right->y = ry; -} - -static void nsvg__squareCap(NSVGrasterizer *r, NSVGpoint *left, NSVGpoint *right, NSVGpoint *p, - float dx, float dy, float lineWidth, int connect) -{ - float w = lineWidth * 0.5f; - float px = p->x - dx * w, py = p->y - dy * w; - float dlx = dy, dly = -dx; - float lx = px - dlx * w, ly = py - dly * w; - float rx = px + dlx * w, ry = py + dly * w; - - nsvg__addEdge(r, lx, ly, rx, ry); - - if (connect) { - nsvg__addEdge(r, left->x, left->y, lx, ly); - nsvg__addEdge(r, rx, ry, right->x, right->y); - } - left->x = lx; - left->y = ly; - right->x = rx; - right->y = ry; -} - -#ifndef NSVG_PI -#define NSVG_PI (3.14159265358979323846264338327f) -#endif - -static void nsvg__roundCap(NSVGrasterizer *r, NSVGpoint *left, NSVGpoint *right, NSVGpoint *p, - float dx, float dy, float lineWidth, int ncap, int connect) -{ - int i; - float w = lineWidth * 0.5f; - float px = p->x, py = p->y; - float dlx = dy, dly = -dx; - float lx = 0, ly = 0, rx = 0, ry = 0, prevx = 0, prevy = 0; - - for (i = 0; i < ncap; i++) { - float a = (float)i / (float)(ncap - 1) * NSVG_PI; - float ax = cosf(a) * w, ay = sinf(a) * w; - float x = px - dlx * ax - dx * ay; - float y = py - dly * ax - dy * ay; - - if (i > 0) - nsvg__addEdge(r, prevx, prevy, x, y); - - prevx = x; - prevy = y; - - if (i == 0) { - lx = x; - ly = y; - } else if (i == ncap - 1) { - rx = x; - ry = y; - } - } - - if (connect) { - nsvg__addEdge(r, left->x, left->y, lx, ly); - nsvg__addEdge(r, rx, ry, right->x, right->y); - } - - left->x = lx; - left->y = ly; - right->x = rx; - right->y = ry; -} - -static void nsvg__bevelJoin(NSVGrasterizer *r, NSVGpoint *left, NSVGpoint *right, NSVGpoint *p0, - NSVGpoint *p1, float lineWidth) -{ - float w = lineWidth * 0.5f; - float dlx0 = p0->dy, dly0 = -p0->dx; - float dlx1 = p1->dy, dly1 = -p1->dx; - float lx0 = p1->x - (dlx0 * w), ly0 = p1->y - (dly0 * w); - float rx0 = p1->x + (dlx0 * w), ry0 = p1->y + (dly0 * w); - float lx1 = p1->x - (dlx1 * w), ly1 = p1->y - (dly1 * w); - float rx1 = p1->x + (dlx1 * w), ry1 = p1->y + (dly1 * w); - - nsvg__addEdge(r, lx0, ly0, left->x, left->y); - nsvg__addEdge(r, lx1, ly1, lx0, ly0); - - nsvg__addEdge(r, right->x, right->y, rx0, ry0); - nsvg__addEdge(r, rx0, ry0, rx1, ry1); - - left->x = lx1; - left->y = ly1; - right->x = rx1; - right->y = ry1; -} - -static void nsvg__miterJoin(NSVGrasterizer *r, NSVGpoint *left, NSVGpoint *right, NSVGpoint *p0, - NSVGpoint *p1, float lineWidth) -{ - float w = lineWidth * 0.5f; - float dlx0 = p0->dy, dly0 = -p0->dx; - float dlx1 = p1->dy, dly1 = -p1->dx; - float lx0, rx0, lx1, rx1; - float ly0, ry0, ly1, ry1; - - if (p1->flags & NSVG_PT_LEFT) { - lx0 = lx1 = p1->x - p1->dmx * w; - ly0 = ly1 = p1->y - p1->dmy * w; - nsvg__addEdge(r, lx1, ly1, left->x, left->y); - - rx0 = p1->x + (dlx0 * w); - ry0 = p1->y + (dly0 * w); - rx1 = p1->x + (dlx1 * w); - ry1 = p1->y + (dly1 * w); - nsvg__addEdge(r, right->x, right->y, rx0, ry0); - nsvg__addEdge(r, rx0, ry0, rx1, ry1); - } else { - lx0 = p1->x - (dlx0 * w); - ly0 = p1->y - (dly0 * w); - lx1 = p1->x - (dlx1 * w); - ly1 = p1->y - (dly1 * w); - nsvg__addEdge(r, lx0, ly0, left->x, left->y); - nsvg__addEdge(r, lx1, ly1, lx0, ly0); - - rx0 = rx1 = p1->x + p1->dmx * w; - ry0 = ry1 = p1->y + p1->dmy * w; - nsvg__addEdge(r, right->x, right->y, rx1, ry1); - } - - left->x = lx1; - left->y = ly1; - right->x = rx1; - right->y = ry1; -} - -static void nsvg__roundJoin(NSVGrasterizer *r, NSVGpoint *left, NSVGpoint *right, NSVGpoint *p0, - NSVGpoint *p1, float lineWidth, int ncap) -{ - int i, n; - float w = lineWidth * 0.5f; - float dlx0 = p0->dy, dly0 = -p0->dx; - float dlx1 = p1->dy, dly1 = -p1->dx; - float a0 = atan2f(dly0, dlx0); - float a1 = atan2f(dly1, dlx1); - float da = a1 - a0; - float lx, ly, rx, ry; - - if (da < NSVG_PI) - da += NSVG_PI * 2; - if (da > NSVG_PI) - da -= NSVG_PI * 2; - - n = (int)ceilf((nsvg__absf(da) / NSVG_PI) * (float)ncap); - if (n < 2) - n = 2; - if (n > ncap) - n = ncap; - - lx = left->x; - ly = left->y; - rx = right->x; - ry = right->y; - - for (i = 0; i < n; i++) { - float u = (float)i / (float)(n - 1); - float a = a0 + u * da; - float ax = cosf(a) * w, ay = sinf(a) * w; - float lx1 = p1->x - ax, ly1 = p1->y - ay; - float rx1 = p1->x + ax, ry1 = p1->y + ay; - - nsvg__addEdge(r, lx1, ly1, lx, ly); - nsvg__addEdge(r, rx, ry, rx1, ry1); - - lx = lx1; - ly = ly1; - rx = rx1; - ry = ry1; - } - - left->x = lx; - left->y = ly; - right->x = rx; - right->y = ry; -} - -static void nsvg__straightJoin(NSVGrasterizer *r, NSVGpoint *left, NSVGpoint *right, NSVGpoint *p1, - float lineWidth) -{ - float w = lineWidth * 0.5f; - float lx = p1->x - (p1->dmx * w), ly = p1->y - (p1->dmy * w); - float rx = p1->x + (p1->dmx * w), ry = p1->y + (p1->dmy * w); - - nsvg__addEdge(r, lx, ly, left->x, left->y); - nsvg__addEdge(r, right->x, right->y, rx, ry); - - left->x = lx; - left->y = ly; - right->x = rx; - right->y = ry; -} - -static int nsvg__curveDivs(float r, float arc, float tol) -{ - float da = acosf(r / (r + tol)) * 2.0f; - int divs = (int)ceilf(arc / da); - if (divs < 2) - divs = 2; - return divs; -} - -static void nsvg__expandStroke(NSVGrasterizer *r, NSVGpoint *points, int npoints, int closed, - int lineJoin, int lineCap, float lineWidth) -{ - int ncap = nsvg__curveDivs(lineWidth * 0.5f, NSVG_PI, - r->tessTol); // Calculate divisions per half circle. - NSVGpoint left = { 0, 0, 0, 0, 0, 0, 0, 0 }, right = { 0, 0, 0, 0, 0, 0, 0, 0 }, - firstLeft = { 0, 0, 0, 0, 0, 0, 0, 0 }, firstRight = { 0, 0, 0, 0, 0, 0, 0, 0 }; - NSVGpoint *p0, *p1; - int j, s, e; - - // Build stroke edges - if (closed) { - // Looping - p0 = &points[npoints - 1]; - p1 = &points[0]; - s = 0; - e = npoints; - } else { - // Add cap - p0 = &points[0]; - p1 = &points[1]; - s = 1; - e = npoints - 1; - } - - if (closed) { - nsvg__initClosed(&left, &right, p0, p1, lineWidth); - firstLeft = left; - firstRight = right; - } else { - // Add cap - float dx = p1->x - p0->x; - float dy = p1->y - p0->y; - nsvg__normalize(&dx, &dy); - if (lineCap == NSVG_CAP_BUTT) - nsvg__buttCap(r, &left, &right, p0, dx, dy, lineWidth, 0); - else if (lineCap == NSVG_CAP_SQUARE) - nsvg__squareCap(r, &left, &right, p0, dx, dy, lineWidth, 0); - else if (lineCap == NSVG_CAP_ROUND) - nsvg__roundCap(r, &left, &right, p0, dx, dy, lineWidth, ncap, 0); - } - - for (j = s; j < e; ++j) { - if (p1->flags & NSVG_PT_CORNER) { - if (lineJoin == NSVG_JOIN_ROUND) - nsvg__roundJoin(r, &left, &right, p0, p1, lineWidth, ncap); - else if (lineJoin == NSVG_JOIN_BEVEL || (p1->flags & NSVG_PT_BEVEL)) - nsvg__bevelJoin(r, &left, &right, p0, p1, lineWidth); - else - nsvg__miterJoin(r, &left, &right, p0, p1, lineWidth); - } else { - nsvg__straightJoin(r, &left, &right, p1, lineWidth); - } - p0 = p1++; - } - - if (closed) { - // Loop it - nsvg__addEdge(r, firstLeft.x, firstLeft.y, left.x, left.y); - nsvg__addEdge(r, right.x, right.y, firstRight.x, firstRight.y); - } else { - // Add cap - float dx = p1->x - p0->x; - float dy = p1->y - p0->y; - nsvg__normalize(&dx, &dy); - if (lineCap == NSVG_CAP_BUTT) - nsvg__buttCap(r, &right, &left, p1, -dx, -dy, lineWidth, 1); - else if (lineCap == NSVG_CAP_SQUARE) - nsvg__squareCap(r, &right, &left, p1, -dx, -dy, lineWidth, 1); - else if (lineCap == NSVG_CAP_ROUND) - nsvg__roundCap(r, &right, &left, p1, -dx, -dy, lineWidth, ncap, 1); - } -} - -static void nsvg__prepareStroke(NSVGrasterizer *r, float miterLimit, int lineJoin) -{ - int i, j; - NSVGpoint *p0, *p1; - - p0 = &r->points[r->npoints - 1]; - p1 = &r->points[0]; - for (i = 0; i < r->npoints; i++) { - // Calculate segment direction and length - p0->dx = p1->x - p0->x; - p0->dy = p1->y - p0->y; - p0->len = nsvg__normalize(&p0->dx, &p0->dy); - // Advance - p0 = p1++; - } - - // calculate joins - p0 = &r->points[r->npoints - 1]; - p1 = &r->points[0]; - for (j = 0; j < r->npoints; j++) { - float dlx0, dly0, dlx1, dly1, dmr2, cross; - dlx0 = p0->dy; - dly0 = -p0->dx; - dlx1 = p1->dy; - dly1 = -p1->dx; - // Calculate extrusions - p1->dmx = (dlx0 + dlx1) * 0.5f; - p1->dmy = (dly0 + dly1) * 0.5f; - dmr2 = p1->dmx * p1->dmx + p1->dmy * p1->dmy; - if (dmr2 > 0.000001f) { - float s2 = 1.0f / dmr2; - if (s2 > 600.0f) { - s2 = 600.0f; - } - p1->dmx *= s2; - p1->dmy *= s2; - } - - // Clear flags, but keep the corner. - p1->flags = (p1->flags & NSVG_PT_CORNER) ? NSVG_PT_CORNER : 0; - - // Keep track of left turns. - cross = p1->dx * p0->dy - p0->dx * p1->dy; - if (cross > 0.0f) - p1->flags |= NSVG_PT_LEFT; - - // Check to see if the corner needs to be beveled. - if (p1->flags & NSVG_PT_CORNER) { - if ((dmr2 * miterLimit * miterLimit) < 1.0f || - lineJoin == NSVG_JOIN_BEVEL || lineJoin == NSVG_JOIN_ROUND) { - p1->flags |= NSVG_PT_BEVEL; - } - } - - p0 = p1++; - } -} - -static void nsvg__flattenShapeStroke(NSVGrasterizer *r, NSVGshape *shape, float scale) -{ - int i, j, closed; - NSVGpath *path; - NSVGpoint *p0, *p1; - float miterLimit = shape->miterLimit; - int lineJoin = shape->strokeLineJoin; - int lineCap = shape->strokeLineCap; - float lineWidth = shape->strokeWidth * scale; - - for (path = shape->paths; path != NULL; path = path->next) { - // Flatten path - r->npoints = 0; - nsvg__addPathPoint(r, path->pts[0] * scale, path->pts[1] * scale, NSVG_PT_CORNER); - for (i = 0; i < path->npts - 1; i += 3) { - float *p = &path->pts[i * 2]; - nsvg__flattenCubicBez(r, p[0] * scale, p[1] * scale, p[2] * scale, - p[3] * scale, p[4] * scale, p[5] * scale, - p[6] * scale, p[7] * scale, 0, NSVG_PT_CORNER); - } - if (r->npoints < 2) - continue; - - closed = path->closed; - - // If the first and last points are the same, remove the last, mark as closed path. - p0 = &r->points[r->npoints - 1]; - p1 = &r->points[0]; - if (nsvg__ptEquals(p0->x, p0->y, p1->x, p1->y, r->distTol)) { - r->npoints--; - p0 = &r->points[r->npoints - 1]; - closed = 1; - } - - if (shape->strokeDashCount > 0) { - int idash = 0, dashState = 1; - float totalDist = 0, dashLen, allDashLen, dashOffset; - NSVGpoint cur; - - if (closed) - nsvg__appendPathPoint(r, r->points[0]); - - // Duplicate points -> points2. - nsvg__duplicatePoints(r); - - r->npoints = 0; - cur = r->points2[0]; - nsvg__appendPathPoint(r, cur); - - // Figure out dash offset. - allDashLen = 0; - for (j = 0; j < shape->strokeDashCount; j++) - allDashLen += shape->strokeDashArray[j]; - if (shape->strokeDashCount & 1) - allDashLen *= 2.0f; - // Find location inside pattern - dashOffset = fmodf(shape->strokeDashOffset, allDashLen); - if (dashOffset < 0.0f) - dashOffset += allDashLen; - - while (dashOffset > shape->strokeDashArray[idash]) { - dashOffset -= shape->strokeDashArray[idash]; - idash = (idash + 1) % shape->strokeDashCount; - } - dashLen = (shape->strokeDashArray[idash] - dashOffset) * scale; - - for (j = 1; j < r->npoints2;) { - float dx = r->points2[j].x - cur.x; - float dy = r->points2[j].y - cur.y; - float dist = sqrtf(dx * dx + dy * dy); - - if ((totalDist + dist) > dashLen) { - // Calculate intermediate point - float d = (dashLen - totalDist) / dist; - float x = cur.x + dx * d; - float y = cur.y + dy * d; - nsvg__addPathPoint(r, x, y, NSVG_PT_CORNER); - - // Stroke - if (r->npoints > 1 && dashState) { - nsvg__prepareStroke(r, miterLimit, lineJoin); - nsvg__expandStroke(r, r->points, r->npoints, 0, - lineJoin, lineCap, lineWidth); - } - // Advance dash pattern - dashState = !dashState; - idash = (idash + 1) % shape->strokeDashCount; - dashLen = shape->strokeDashArray[idash] * scale; - // Restart - cur.x = x; - cur.y = y; - cur.flags = NSVG_PT_CORNER; - totalDist = 0.0f; - r->npoints = 0; - nsvg__appendPathPoint(r, cur); - } else { - totalDist += dist; - cur = r->points2[j]; - nsvg__appendPathPoint(r, cur); - j++; - } - } - // Stroke any leftover path - if (r->npoints > 1 && dashState) - nsvg__expandStroke(r, r->points, r->npoints, 0, lineJoin, lineCap, - lineWidth); - } else { - nsvg__prepareStroke(r, miterLimit, lineJoin); - nsvg__expandStroke(r, r->points, r->npoints, closed, lineJoin, lineCap, - lineWidth); - } - } -} - -static int nsvg__cmpEdge(const void *p, const void *q) -{ - const NSVGedge *a = (const NSVGedge *)p; - const NSVGedge *b = (const NSVGedge *)q; - - if (a->y0 < b->y0) - return -1; - if (a->y0 > b->y0) - return 1; - return 0; -} - -static NSVGactiveEdge *nsvg__addActive(NSVGrasterizer *r, NSVGedge *e, float startPoint) -{ - NSVGactiveEdge *z; - - if (r->freelist != NULL) { - // Restore from freelist. - z = r->freelist; - r->freelist = z->next; - } else { - // Alloc new edge. - z = (NSVGactiveEdge *)nsvg__alloc(r, sizeof(NSVGactiveEdge)); - if (z == NULL) - return NULL; - } - - float dxdy = (e->x1 - e->x0) / (e->y1 - e->y0); - // STBTT_assert(e->y0 <= start_point); - // round dx down to avoid going too far - if (dxdy < 0) - z->dx = (int)(-floorf(NSVG__FIX * -dxdy)); - else - z->dx = (int)floorf(NSVG__FIX * dxdy); - z->x = (int)floorf(NSVG__FIX * (e->x0 + dxdy * (startPoint - e->y0))); - // z->x -= off_x * FIX; - z->ey = e->y1; - z->next = 0; - z->dir = e->dir; - - return z; -} - -static void nsvg__freeActive(NSVGrasterizer *r, NSVGactiveEdge *z) -{ - z->next = r->freelist; - r->freelist = z; -} - -static void nsvg__fillScanline(unsigned char *scanline, int len, int x0, int x1, int maxWeight, - int *xmin, int *xmax) -{ - int i = x0 >> NSVG__FIXSHIFT; - int j = x1 >> NSVG__FIXSHIFT; - if (i < *xmin) - *xmin = i; - if (j > *xmax) - *xmax = j; - if (i < len && j >= 0) { - if (i == j) { - // x0,x1 are the same pixel, so compute combined coverage - scanline[i] = (unsigned char)(scanline[i] + - ((x1 - x0) * maxWeight >> NSVG__FIXSHIFT)); - } else { - if (i >= 0) // add antialiasing for x0 - scanline[i] = (unsigned char)(scanline[i] + - (((NSVG__FIX - (x0 & NSVG__FIXMASK)) * - maxWeight) >> - NSVG__FIXSHIFT)); - else - i = -1; // clip - - if (j < len) // add antialiasing for x1 - scanline[j] = (unsigned char)(scanline[j] + - (((x1 & NSVG__FIXMASK) * maxWeight) >> - NSVG__FIXSHIFT)); - else - j = len; // clip - - for (++i; i < j; ++i) // fill pixels between x0 and x1 - scanline[i] = (unsigned char)(scanline[i] + maxWeight); - } - } -} - -// note: this routine clips fills that extend off the edges... ideally this -// wouldn't happen, but it could happen if the truetype glyph bounding boxes -// are wrong, or if the user supplies a too-small bitmap -static void nsvg__fillActiveEdges(unsigned char *scanline, int len, NSVGactiveEdge *e, - int maxWeight, int *xmin, int *xmax, char fillRule) -{ - // non-zero winding fill - int x0 = 0, w = 0; - - if (fillRule == NSVG_FILLRULE_NONZERO) { - // Non-zero - while (e != NULL) { - if (w == 0) { - // if we're currently at zero, we need to record the edge start - // point - x0 = e->x; - w += e->dir; - } else { - int x1 = e->x; - w += e->dir; - // if we went to zero, we need to draw - if (w == 0) - nsvg__fillScanline(scanline, len, x0, x1, maxWeight, xmin, - xmax); - } - e = e->next; - } - } else if (fillRule == NSVG_FILLRULE_EVENODD) { - // Even-odd - while (e != NULL) { - if (w == 0) { - // if we're currently at zero, we need to record the edge start - // point - x0 = e->x; - w = 1; - } else { - int x1 = e->x; - w = 0; - nsvg__fillScanline(scanline, len, x0, x1, maxWeight, xmin, xmax); - } - e = e->next; - } - } -} - -static float nsvg__clampf(float a, float mn, float mx) -{ - return a < mn ? mn : (a > mx ? mx : a); -} - -static unsigned int nsvg__RGBA(unsigned char r, unsigned char g, unsigned char b, unsigned char a) -{ - return (r) | (g << 8) | (b << 16) | (a << 24); -} - -static unsigned int nsvg__lerpRGBA(unsigned int c0, unsigned int c1, float u) -{ - int iu = (int)(nsvg__clampf(u, 0.0f, 1.0f) * 256.0f); - int r = (((c0)&0xff) * (256 - iu) + (((c1)&0xff) * iu)) >> 8; - int g = (((c0 >> 8) & 0xff) * (256 - iu) + (((c1 >> 8) & 0xff) * iu)) >> 8; - int b = (((c0 >> 16) & 0xff) * (256 - iu) + (((c1 >> 16) & 0xff) * iu)) >> 8; - int a = (((c0 >> 24) & 0xff) * (256 - iu) + (((c1 >> 24) & 0xff) * iu)) >> 8; - return nsvg__RGBA((unsigned char)r, (unsigned char)g, (unsigned char)b, (unsigned char)a); -} - -static unsigned int nsvg__applyOpacity(unsigned int c, float u) -{ - int iu = (int)(nsvg__clampf(u, 0.0f, 1.0f) * 256.0f); - int r = (c)&0xff; - int g = (c >> 8) & 0xff; - int b = (c >> 16) & 0xff; - int a = (((c >> 24) & 0xff) * iu) >> 8; - return nsvg__RGBA((unsigned char)r, (unsigned char)g, (unsigned char)b, (unsigned char)a); -} - -static inline int nsvg__div255(int x) -{ - return ((x + 1) * 257) >> 16; -} - -static void nsvg__scanlineSolid(unsigned char *dst, int count, unsigned char *cover, int x, int y, - float tx, float ty, float scale, NSVGcachedPaint *cache) -{ - - if (cache->type == NSVG_PAINT_COLOR) { - int i, cr, cg, cb, ca; - cr = cache->colors[0] & 0xff; - cg = (cache->colors[0] >> 8) & 0xff; - cb = (cache->colors[0] >> 16) & 0xff; - ca = (cache->colors[0] >> 24) & 0xff; - - for (i = 0; i < count; i++) { - int r, g, b; - int a = nsvg__div255((int)cover[0] * ca); - int ia = 255 - a; - // Premultiply - r = nsvg__div255(cr * a); - g = nsvg__div255(cg * a); - b = nsvg__div255(cb * a); - - // Blend over - r += nsvg__div255(ia * (int)dst[0]); - g += nsvg__div255(ia * (int)dst[1]); - b += nsvg__div255(ia * (int)dst[2]); - a += nsvg__div255(ia * (int)dst[3]); - - dst[0] = (unsigned char)r; - dst[1] = (unsigned char)g; - dst[2] = (unsigned char)b; - dst[3] = (unsigned char)a; - - cover++; - dst += 4; - } - } else if (cache->type == NSVG_PAINT_LINEAR_GRADIENT) { - // TODO: spread modes. - // TODO: plenty of opportunities to optimize. - float fx, fy, dx, gy; - float *t = cache->xform; - int i, cr, cg, cb, ca; - unsigned int c; - - fx = ((float)x - tx) / scale; - fy = ((float)y - ty) / scale; - dx = 1.0f / scale; - - for (i = 0; i < count; i++) { - int r, g, b, a, ia; - gy = fx * t[1] + fy * t[3] + t[5]; - c = cache->colors[(int)nsvg__clampf(gy * 255.0f, 0, 255.0f)]; - cr = (c)&0xff; - cg = (c >> 8) & 0xff; - cb = (c >> 16) & 0xff; - ca = (c >> 24) & 0xff; - - a = nsvg__div255((int)cover[0] * ca); - ia = 255 - a; - - // Premultiply - r = nsvg__div255(cr * a); - g = nsvg__div255(cg * a); - b = nsvg__div255(cb * a); - - // Blend over - r += nsvg__div255(ia * (int)dst[0]); - g += nsvg__div255(ia * (int)dst[1]); - b += nsvg__div255(ia * (int)dst[2]); - a += nsvg__div255(ia * (int)dst[3]); - - dst[0] = (unsigned char)r; - dst[1] = (unsigned char)g; - dst[2] = (unsigned char)b; - dst[3] = (unsigned char)a; - - cover++; - dst += 4; - fx += dx; - } - } else if (cache->type == NSVG_PAINT_RADIAL_GRADIENT) { - // TODO: spread modes. - // TODO: plenty of opportunities to optimize. - // TODO: focus (fx,fy) - float fx, fy, dx, gx, gy, gd; - float *t = cache->xform; - int i, cr, cg, cb, ca; - unsigned int c; - - fx = ((float)x - tx) / scale; - fy = ((float)y - ty) / scale; - dx = 1.0f / scale; - - for (i = 0; i < count; i++) { - int r, g, b, a, ia; - gx = fx * t[0] + fy * t[2] + t[4]; - gy = fx * t[1] + fy * t[3] + t[5]; - gd = sqrtf(gx * gx + gy * gy); - c = cache->colors[(int)nsvg__clampf(gd * 255.0f, 0, 255.0f)]; - cr = (c)&0xff; - cg = (c >> 8) & 0xff; - cb = (c >> 16) & 0xff; - ca = (c >> 24) & 0xff; - - a = nsvg__div255((int)cover[0] * ca); - ia = 255 - a; - - // Premultiply - r = nsvg__div255(cr * a); - g = nsvg__div255(cg * a); - b = nsvg__div255(cb * a); - - // Blend over - r += nsvg__div255(ia * (int)dst[0]); - g += nsvg__div255(ia * (int)dst[1]); - b += nsvg__div255(ia * (int)dst[2]); - a += nsvg__div255(ia * (int)dst[3]); - - dst[0] = (unsigned char)r; - dst[1] = (unsigned char)g; - dst[2] = (unsigned char)b; - dst[3] = (unsigned char)a; - - cover++; - dst += 4; - fx += dx; - } - } -} - -static void nsvg__rasterizeSortedEdges(NSVGrasterizer *r, float tx, float ty, float scale, - NSVGcachedPaint *cache, char fillRule) -{ - NSVGactiveEdge *active = NULL; - int y, s; - int e = 0; - int maxWeight = (255 / NSVG__SUBSAMPLES); // weight per vertical scanline - int xmin, xmax; - - for (y = 0; y < r->height; y++) { - memset(r->scanline, 0, r->width); - xmin = r->width; - xmax = 0; - for (s = 0; s < NSVG__SUBSAMPLES; ++s) { - // find center of pixel for this scanline - float scany = (float)(y * NSVG__SUBSAMPLES + s) + 0.5f; - NSVGactiveEdge **step = &active; - - // update all active edges; - // remove all active edges that terminate before the center of this scanline - while (*step) { - NSVGactiveEdge *z = *step; - if (z->ey <= scany) { - *step = z->next; // delete from list - // NSVG__assert(z->valid); - nsvg__freeActive(r, z); - } else { - z->x += z->dx; // advance to position for current scanline - step = &((*step)->next); // advance through list - } - } - - // resort the list if needed - for (;;) { - int changed = 0; - step = &active; - while (*step && (*step)->next) { - if ((*step)->x > (*step)->next->x) { - NSVGactiveEdge *t = *step; - NSVGactiveEdge *q = t->next; - t->next = q->next; - q->next = t; - *step = q; - changed = 1; - } - step = &(*step)->next; - } - if (!changed) - break; - } - - // insert all edges that start before the center of this scanline -- omit - // ones that also end on this scanline - while (e < r->nedges && r->edges[e].y0 <= scany) { - if (r->edges[e].y1 > scany) { - NSVGactiveEdge *z = nsvg__addActive(r, &r->edges[e], scany); - if (z == NULL) - break; - // find insertion point - if (active == NULL) { - active = z; - } else if (z->x < active->x) { - // insert at front - z->next = active; - active = z; - } else { - // find thing to insert AFTER - NSVGactiveEdge *p = active; - while (p->next && p->next->x < z->x) - p = p->next; - // at this point, p->next->x is NOT < z->x - z->next = p->next; - p->next = z; - } - } - e++; - } - - // now process all active edges in non-zero fashion - if (active != NULL) - nsvg__fillActiveEdges(r->scanline, r->width, active, maxWeight, - &xmin, &xmax, fillRule); - } - // Blit - if (xmin < 0) - xmin = 0; - if (xmax > r->width - 1) - xmax = r->width - 1; - if (xmin <= xmax) { - nsvg__scanlineSolid(&r->bitmap[y * r->stride] + xmin * 4, xmax - xmin + 1, - &r->scanline[xmin], xmin, y, tx, ty, scale, cache); - } - } -} - -static void nsvg__unpremultiplyAlpha(unsigned char *image, int w, int h, int stride) -{ - int x, y; - - // Unpremultiply - for (y = 0; y < h; y++) { - unsigned char *row = &image[y * stride]; - for (x = 0; x < w; x++) { - int r = row[0], g = row[1], b = row[2], a = row[3]; - if (a != 0) { - row[0] = (unsigned char)(r * 255 / a); - row[1] = (unsigned char)(g * 255 / a); - row[2] = (unsigned char)(b * 255 / a); - } - row += 4; - } - } - - // Defringe - for (y = 0; y < h; y++) { - unsigned char *row = &image[y * stride]; - for (x = 0; x < w; x++) { - int r = 0, g = 0, b = 0, a = row[3], n = 0; - if (a == 0) { - if (x - 1 > 0 && row[-1] != 0) { - r += row[-4]; - g += row[-3]; - b += row[-2]; - n++; - } - if (x + 1 < w && row[7] != 0) { - r += row[4]; - g += row[5]; - b += row[6]; - n++; - } - if (y - 1 > 0 && row[-stride + 3] != 0) { - r += row[-stride]; - g += row[-stride + 1]; - b += row[-stride + 2]; - n++; - } - if (y + 1 < h && row[stride + 3] != 0) { - r += row[stride]; - g += row[stride + 1]; - b += row[stride + 2]; - n++; - } - if (n > 0) { - row[0] = (unsigned char)(r / n); - row[1] = (unsigned char)(g / n); - row[2] = (unsigned char)(b / n); - } - } - row += 4; - } - } -} - -static void nsvg__initPaint(NSVGcachedPaint *cache, NSVGpaint *paint, float opacity) -{ - int i, j; - NSVGgradient *grad; - - cache->type = paint->type; - - if (paint->type == NSVG_PAINT_COLOR) { - cache->colors[0] = nsvg__applyOpacity(paint->color, opacity); - return; - } - - grad = paint->gradient; - - cache->spread = grad->spread; - memcpy(cache->xform, grad->xform, sizeof(float) * 6); - - if (grad->nstops == 0) { - for (i = 0; i < 256; i++) - cache->colors[i] = 0; - } - if (grad->nstops == 1) { - for (i = 0; i < 256; i++) - cache->colors[i] = nsvg__applyOpacity(grad->stops[i].color, opacity); - } else { - unsigned int ca, cb = 0; - float ua, ub, du, u; - int ia, ib, count; - - ca = nsvg__applyOpacity(grad->stops[0].color, opacity); - ua = nsvg__clampf(grad->stops[0].offset, 0, 1); - ub = nsvg__clampf(grad->stops[grad->nstops - 1].offset, ua, 1); - ia = (int)(ua * 255.0f); - ib = (int)(ub * 255.0f); - for (i = 0; i < ia; i++) { - cache->colors[i] = ca; - } - - for (i = 0; i < grad->nstops - 1; i++) { - ca = nsvg__applyOpacity(grad->stops[i].color, opacity); - cb = nsvg__applyOpacity(grad->stops[i + 1].color, opacity); - ua = nsvg__clampf(grad->stops[i].offset, 0, 1); - ub = nsvg__clampf(grad->stops[i + 1].offset, 0, 1); - ia = (int)(ua * 255.0f); - ib = (int)(ub * 255.0f); - count = ib - ia; - if (count <= 0) - continue; - u = 0; - du = 1.0f / (float)count; - for (j = 0; j < count; j++) { - cache->colors[ia + j] = nsvg__lerpRGBA(ca, cb, u); - u += du; - } - } - - for (i = ib; i < 256; i++) - cache->colors[i] = cb; - } -} - -/* -static void dumpEdges(NSVGrasterizer* r, const char* name) -{ - float xmin = 0, xmax = 0, ymin = 0, ymax = 0; - NSVGedge *e = NULL; - int i; - if (r->nedges == 0) return; - FILE* fp = fopen(name, "w"); - if (fp == NULL) return; - - xmin = xmax = r->edges[0].x0; - ymin = ymax = r->edges[0].y0; - for (i = 0; i < r->nedges; i++) { - e = &r->edges[i]; - xmin = nsvg__minf(xmin, e->x0); - xmin = nsvg__minf(xmin, e->x1); - xmax = nsvg__maxf(xmax, e->x0); - xmax = nsvg__maxf(xmax, e->x1); - ymin = nsvg__minf(ymin, e->y0); - ymin = nsvg__minf(ymin, e->y1); - ymax = nsvg__maxf(ymax, e->y0); - ymax = nsvg__maxf(ymax, e->y1); - } - - fprintf(fp, "", xmin, -ymin, (xmax - xmin), (ymax - ymin)); - - for (i = 0; i < r->nedges; i++) { - e = &r->edges[i]; - fprintf(fp ,"", e->x0,e->y0, e->x1,e->y1); - } - - for (i = 0; i < r->npoints; i++) { - if (i+1 < r->npoints) - fprintf(fp ,"", r->points[i].x, r->points[i].y, r->points[i+1].x, r->points[i+1].y); - fprintf(fp ,"", -r->points[i].x, r->points[i].y, r->points[i].flags == 0 ? "#f00" : "#0f0"); - } - - fprintf(fp, ""); - fclose(fp); -} -*/ - -void nsvgRasterizeText(NSVGrasterizer *r, const NSVGimage *font, float tx, float ty, float scale, - unsigned char *dst, int w, int h, int stride, const char *text) -{ - NSVGshape *shape = NULL; - NSVGedge *e = NULL; - NSVGcachedPaint cache; - NSVGshape **shapes = nsvgGetTextShapes(font, text, strlen(text)); - int i = 0, j = 0, textLen = strlen(text); - int fontHeight = (font->fontAscent - font->fontDescent) * scale; - int xStart = tx; - int charWidth = font->defaultHorizAdv * scale; - - // Hack because for some reason this has Y increase UP and we - // need to go DOWN every line - ty = ty + h - fontHeight; - - r->bitmap = dst; - r->width = w; - r->height = h; - r->stride = stride; - - if (w > r->cscanline) { - r->cscanline = w; - r->scanline = (unsigned char *)realloc(r->scanline, w); - if (r->scanline == NULL) { - return; - } - } - - for (i = 0; i < h; i++) { - memset(&dst[i * stride], 0, w * 4); - } - - for (i = 0; i < textLen; i++) { - if (text[i] == '\n') { - ty -= fontHeight; - // No clue why this is needed - tx = xStart - charWidth; - continue; - } - shape = shapes[i]; - if (!shape) { - if (text[i] == ' ') - tx += charWidth / 2.f; - continue; - } - if (!(shape->flags & NSVG_FLAGS_VISIBLE)) - continue; - - if (i == 0 && strcmp(shape->id, "OpenSansRegular") == 0) - tx = xStart - charWidth; - - if (shape->fill.type != NSVG_PAINT_NONE) { - nsvg__resetPool(r); - shape->fill.color = 0xffffffff; - r->freelist = NULL; - r->nedges = 0; - - nsvg__flattenShape(r, shape, scale); - - // Scale and translate edges - for (j = 0; j < r->nedges; j++) { - e = &r->edges[j]; - e->x0 = tx + e->x0; - e->y0 = (ty + e->y0) * NSVG__SUBSAMPLES; - e->x1 = tx + e->x1; - e->y1 = (ty + e->y1) * NSVG__SUBSAMPLES; - } - - // Rasterize edges - qsort(r->edges, r->nedges, sizeof(NSVGedge), nsvg__cmpEdge); - - // now, traverse the scanlines and find the intersections on each scanline, - // use non-zero rule - nsvg__initPaint(&cache, &shape->fill, shape->opacity); - - nsvg__rasterizeSortedEdges(r, tx, ty, scale, &cache, shape->fillRule); - } - if (shape->stroke.type != NSVG_PAINT_NONE && (shape->strokeWidth * scale) > 0.01f) { - nsvg__resetPool(r); - r->freelist = NULL; - r->nedges = 0; - - nsvg__flattenShapeStroke(r, shape, scale); - - // dumpEdges(r, "edge.svg"); - - // Scale and translate edges - for (j = 0; j < r->nedges; j++) { - e = &r->edges[j]; - e->x0 = tx + e->x0; - e->y0 = (ty + e->y0) * NSVG__SUBSAMPLES; - e->x1 = tx + e->x1; - e->y1 = (ty + e->y1) * NSVG__SUBSAMPLES; - } - - // Rasterize edges - qsort(r->edges, r->nedges, sizeof(NSVGedge), nsvg__cmpEdge); - - // now, traverse the scanlines and find the intersections on each scanline, - // use non-zero rule - nsvg__initPaint(&cache, &shape->stroke, shape->opacity); - - nsvg__rasterizeSortedEdges(r, tx, ty, scale, &cache, NSVG_FILLRULE_NONZERO); - } - tx += shape->horizAdvX * scale; - } - - nsvg__unpremultiplyAlpha(dst, w, h, stride); - - free(shapes); - - r->bitmap = NULL; - r->width = 0; - r->height = 0; - r->stride = 0; -} - -void nsvgRasterize(NSVGrasterizer *r, NSVGimage *image, float tx, float ty, float scale, - unsigned char *dst, int w, int h, int stride) -{ - NSVGshape *shape = NULL; - NSVGedge *e = NULL; - NSVGcachedPaint cache; - int i; - - r->bitmap = dst; - r->width = w; - r->height = h; - r->stride = stride; - - if (w > r->cscanline) { - r->cscanline = w; - r->scanline = (unsigned char *)realloc(r->scanline, w); - if (r->scanline == NULL) - return; - } - - for (i = 0; i < h; i++) - memset(&dst[i * stride], 0, w * 4); - - for (shape = image->shapes; shape != NULL; shape = shape->next) { - if (!(shape->flags & NSVG_FLAGS_VISIBLE)) - continue; - - if (shape->fill.type != NSVG_PAINT_NONE) { - nsvg__resetPool(r); - r->freelist = NULL; - r->nedges = 0; - - nsvg__flattenShape(r, shape, scale); - - // Scale and translate edges - for (i = 0; i < r->nedges; i++) { - e = &r->edges[i]; - e->x0 = tx + e->x0; - e->y0 = (ty + e->y0) * NSVG__SUBSAMPLES; - e->x1 = tx + e->x1; - e->y1 = (ty + e->y1) * NSVG__SUBSAMPLES; - } - - // Rasterize edges - qsort(r->edges, r->nedges, sizeof(NSVGedge), nsvg__cmpEdge); - - // now, traverse the scanlines and find the intersections on each scanline, - // use non-zero rule - nsvg__initPaint(&cache, &shape->fill, shape->opacity); - - nsvg__rasterizeSortedEdges(r, tx, ty, scale, &cache, shape->fillRule); - } - if (shape->stroke.type != NSVG_PAINT_NONE && (shape->strokeWidth * scale) > 0.01f) { - nsvg__resetPool(r); - r->freelist = NULL; - r->nedges = 0; - - nsvg__flattenShapeStroke(r, shape, scale); - - // dumpEdges(r, "edge.svg"); - - // Scale and translate edges - for (i = 0; i < r->nedges; i++) { - e = &r->edges[i]; - e->x0 = tx + e->x0; - e->y0 = (ty + e->y0) * NSVG__SUBSAMPLES; - e->x1 = tx + e->x1; - e->y1 = (ty + e->y1) * NSVG__SUBSAMPLES; - } - - // Rasterize edges - qsort(r->edges, r->nedges, sizeof(NSVGedge), nsvg__cmpEdge); - - // now, traverse the scanlines and find the intersections on each scanline, - // use non-zero rule - nsvg__initPaint(&cache, &shape->stroke, shape->opacity); - - nsvg__rasterizeSortedEdges(r, tx, ty, scale, &cache, NSVG_FILLRULE_NONZERO); - } - } - - nsvg__unpremultiplyAlpha(dst, w, h, stride); - - r->bitmap = NULL; - r->width = 0; - r->height = 0; - r->stride = 0; -} - -#endif diff --git a/src/nanosvg.c b/src/nanosvg.c index ecf037a..a519412 100644 --- a/src/nanosvg.c +++ b/src/nanosvg.c @@ -1,9 +1,4905 @@ -/* Build the nanosvg implementation here, to build it only once and have other - * C files build fast during development. */ +/* + * Copyright (c) 2013-14 Mikko Mononen memon@inside.org + * + * This software is provided 'as-is', without any express or implied + * warranty. In no event will the authors be held liable for any damages + * arising from the use of this software. + * + * Permission is granted to anyone to use this software for any purpose, + * including commercial applications, and to alter it and redistribute it + * freely, subject to the following restrictions: + * + * 1. The origin of this software must not be misrepresented; you must not + * claim that you wrote the original software. If you use this software + * in a product, an acknowledgment in the product documentation would be + * appreciated but is not required. + * 2. Altered source versions must be plainly marked as such, and must not be + * misrepresented as being the original software. + * 3. This notice may not be removed or altered from any source distribution. + * + * The SVG parser is based on Anti-Grain Geometry 2.4 SVG example + * Copyright (C) 2002-2004 Maxim Shemanarev (McSeem) (http://www.antigrain.com/) + * + * Arc calculation code based on canvg (https://code.google.com/p/canvg/) + * + * Bounding box calculation based on + * http://blog.hackers-cafe.net/2009/06/how-to-calculate-bezier-curves-bounding.html + * + */ + #include -#define NANOSVG_IMPLEMENTATION -#include "nanosvg.h" +// NanoSVG is a simple stupid single-header-file SVG parse. The output of the parser is a list of +// cubic bezier shapes. +// +// The library suits well for anything from rendering scalable icons in your editor application to +// prototyping a game. +// +// NanoSVG supports a wide range of SVG features, but something may be missing, feel free to create +// a pull request! +// +// The shapes in the SVG images are transformed by the viewBox and converted to specified units. +// That is, you should get the same looking data as your designed in your favorite app. +// +// NanoSVG can return the paths in few different units. For example if you want to render an image, +// you may choose to get the paths in pixels, or if you are feeding the data into a CNC-cutter, you +// may want to use millimeters. +// +// The units passed to NanoSVG should be one of: 'px', 'pt', 'pc' 'mm', 'cm', or 'in'. +// DPI (dots-per-inch) controls how the unit conversion is done. +// +// If you don't know or care about the units stuff, "px" and 96 should get you going. -#define NANOSVGRAST_IMPLEMENTATION -#include "nanosvgrast.h" +/* Example Usage: + // Load SVG + NSVGimage* image; + image = nsvgParseFromFile("test.svg", "px", 96); + printf("size: %f x %f\n", image->width, image->height); + // Use... + for (NSVGshape *shape = image->shapes; shape != NULL; shape = shape->next) { + for (NSVGpath *path = shape->paths; path != NULL; path = path->next) { + for (int i = 0; i < path->npts-1; i += 3) { + float* p = &path->pts[i*2]; + drawCubicBez(p[0],p[1], p[2],p[3], p[4],p[5], p[6],p[7]); + } + } + } + // Delete + nsvgDelete(image); +*/ + +#define NSVG_MAX_UNICODE_LEN 32 + +enum NSVGpaintType { + NSVG_PAINT_NONE = 0, + NSVG_PAINT_COLOR = 1, + NSVG_PAINT_LINEAR_GRADIENT = 2, + NSVG_PAINT_RADIAL_GRADIENT = 3 +}; + +enum NSVGspreadType { NSVG_SPREAD_PAD = 0, NSVG_SPREAD_REFLECT = 1, NSVG_SPREAD_REPEAT = 2 }; + +enum NSVGlineJoin { NSVG_JOIN_MITER = 0, NSVG_JOIN_ROUND = 1, NSVG_JOIN_BEVEL = 2 }; + +enum NSVGlineCap { NSVG_CAP_BUTT = 0, NSVG_CAP_ROUND = 1, NSVG_CAP_SQUARE = 2 }; + +enum NSVGfillRule { NSVG_FILLRULE_NONZERO = 0, NSVG_FILLRULE_EVENODD = 1 }; + +enum NSVGflags { NSVG_FLAGS_VISIBLE = 0x01 }; + +typedef struct NSVGgradientStop { + unsigned int color; + float offset; +} NSVGgradientStop; + +typedef struct NSVGgradient { + float xform[6]; + char spread; + float fx, fy; + int nstops; + NSVGgradientStop stops[1]; +} NSVGgradient; + +typedef struct NSVGpaint { + char type; + union { + unsigned int color; + NSVGgradient *gradient; + }; +} NSVGpaint; + +typedef struct NSVGpath { + float *pts; // Cubic bezier points: x0,y0, [cpx1,cpx1,cpx2,cpy2,x1,y1], ... + int npts; // Total number of bezier points. + char closed; // Flag indicating if shapes should be treated as closed. + float bounds[4]; // Tight bounding box of the shape [minx,miny,maxx,maxy]. + struct NSVGpath *next; // Pointer to next path, or NULL if last element. +} NSVGpath; + +typedef struct NSVGshape { + char id[64]; // Optional 'id' attr of the shape or its group + NSVGpaint fill; // Fill paint + NSVGpaint stroke; // Stroke paint + float opacity; // Opacity of the shape. + float strokeWidth; // Stroke width (scaled). + float strokeDashOffset; // Stroke dash offset (scaled). + float strokeDashArray[8]; // Stroke dash array (scaled). + char strokeDashCount; // Number of dash values in dash array. + char strokeLineJoin; // Stroke join type. + char strokeLineCap; // Stroke cap type. + float miterLimit; // Miter limit + char fillRule; // Fill rule, see NSVGfillRule. + unsigned char flags; // Logical or of NSVG_FLAGS_* flags + float bounds[4]; // Tight bounding box of the shape [minx,miny,maxx,maxy]. + char unicode[NSVG_MAX_UNICODE_LEN]; // Unicode character code. + int horizAdvX; // Horizontal distance to advance after rendering glyph. + NSVGpath *paths; // Linked list of paths in the image. + struct NSVGshape *next; // Pointer to next shape, or NULL if last element. +} NSVGshape; + +typedef struct NSVGimage { + float width; // Width of the image. + float height; // Height of the image. + int fontAscent; + int fontDescent; + int defaultHorizAdv; + NSVGshape *shapes; // Linked list of shapes in the image. +} NSVGimage; + +// Parses SVG file from a file, returns SVG image as paths. +NSVGimage *nsvgParseFromFile(const char *filename, const char *units, float dpi); + +// Parses SVG file from a null terminated string, returns SVG image as paths. +// Important note: changes the string. +NSVGimage *nsvgParse(char *input, const char *units, float dpi); + +// Duplicates a path. +NSVGpath *nsvgDuplicatePath(NSVGpath *p); + +// Deletes an image. +void nsvgDelete(NSVGimage *image); + +NSVGshape **nsvgGetTextShapes(const NSVGimage *image, const char *text, int textLen); + +#include +#include +#include + +#define NSVG_PI (3.14159265358979323846264338327f) +#define NSVG_KAPPA90 \ + (0.5522847493f) // Length proportional to radius of a cubic bezier handle for 90deg arcs. + +#define NSVG_ALIGN_MIN 0 +#define NSVG_ALIGN_MID 1 +#define NSVG_ALIGN_MAX 2 +#define NSVG_ALIGN_NONE 0 +#define NSVG_ALIGN_MEET 1 +#define NSVG_ALIGN_SLICE 2 + +#define NSVG_NOTUSED(v) \ + do { \ + (void)(1 ? (void)0 : ((void)(v))); \ + } while (0) +#define NSVG_RGB(r, g, b) (((unsigned int)r) | ((unsigned int)g << 8) | ((unsigned int)b << 16)) + +#ifdef _MSC_VER +#pragma warning(disable : 4996) // Switch off security warnings +#pragma warning(disable : 4100) // Switch off unreferenced formal parameter warnings +#ifdef __cplusplus +#define NSVG_INLINE inline +#else +#define NSVG_INLINE +#endif +#else +#define NSVG_INLINE inline +#endif + +static int nsvg__isspace(char c) +{ + return strchr(" \t\n\v\f\r", c) != 0; +} + +static int nsvg__isdigit(char c) +{ + return c >= '0' && c <= '9'; +} + +static NSVG_INLINE float nsvg__minf(float a, float b) +{ + return a < b ? a : b; +} +static NSVG_INLINE float nsvg__maxf(float a, float b) +{ + return a > b ? a : b; +} + +// Simple XML parser + +#define NSVG_XML_TAG 1 +#define NSVG_XML_CONTENT 2 +#define NSVG_XML_MAX_ATTRIBS 256 + +static void nsvg__parseContent(char *s, void (*contentCb)(void *ud, const char *s), void *ud) +{ + // Trim start white spaces + while (*s && nsvg__isspace(*s)) + s++; + if (!*s) + return; + + if (contentCb) + (*contentCb)(ud, s); +} + +static void nsvg__parseElement(char *s, + void (*startelCb)(void *ud, const char *el, const char **attr), + void (*endelCb)(void *ud, const char *el), void *ud) +{ + const char *attr[NSVG_XML_MAX_ATTRIBS]; + int nattr = 0; + char *name; + int start = 0; + int end = 0; + char quote; + + // Skip white space after the '<' + while (*s && nsvg__isspace(*s)) + s++; + + // Check if the tag is end tag + if (*s == '/') { + s++; + end = 1; + } else { + start = 1; + } + + // Skip comments, data and preprocessor stuff. + if (!*s || *s == '?' || *s == '!') + return; + + // Get tag name + name = s; + while (*s && !nsvg__isspace(*s)) + s++; + if (*s) { + *s++ = '\0'; + } + + // Get attribs + while (!end && *s && nattr < NSVG_XML_MAX_ATTRIBS - 3) { + char *name = NULL; + char *value = NULL; + + // Skip white space before the attrib name + while (*s && nsvg__isspace(*s)) + s++; + if (!*s) + break; + if (*s == '/') { + end = 1; + break; + } + name = s; + // Find end of the attrib name. + while (*s && !nsvg__isspace(*s) && *s != '=') + s++; + if (*s) { + *s++ = '\0'; + } + // Skip until the beginning of the value. + while (*s && *s != '\"' && *s != '\'') + s++; + if (!*s) + break; + quote = *s; + s++; + // Store value and find the end of it. + value = s; + while (*s && *s != quote) + s++; + if (*s) { + *s++ = '\0'; + } + + // Store only well formed attributes + if (name && value) { + attr[nattr++] = name; + attr[nattr++] = value; + } + } + + // List terminator + attr[nattr++] = 0; + attr[nattr++] = 0; + + // Call callbacks. + if (start && startelCb) + (*startelCb)(ud, name, attr); + if (end && endelCb) + (*endelCb)(ud, name); +} + +int nsvg__parseXML(char *input, void (*startelCb)(void *ud, const char *el, const char **attr), + void (*endelCb)(void *ud, const char *el), + void (*contentCb)(void *ud, const char *s), void *ud) +{ + char *s = input; + char *mark = s; + int state = NSVG_XML_CONTENT; + while (*s) { + if (*s == '<' && state == NSVG_XML_CONTENT) { + // Start of a tag + *s++ = '\0'; + nsvg__parseContent(mark, contentCb, ud); + mark = s; + state = NSVG_XML_TAG; + } else if (*s == '>' && state == NSVG_XML_TAG) { + // Start of a content or new tag. + *s++ = '\0'; + nsvg__parseElement(mark, startelCb, endelCb, ud); + mark = s; + state = NSVG_XML_CONTENT; + } else { + s++; + } + } + + return 1; +} + +/* Simple SVG parser. */ + +#define NSVG_MAX_ATTR 128 + +enum NSVGgradientUnits { NSVG_USER_SPACE = 0, NSVG_OBJECT_SPACE = 1 }; + +#define NSVG_MAX_DASHES 8 + +enum NSVGunits { + NSVG_UNITS_USER, + NSVG_UNITS_PX, + NSVG_UNITS_PT, + NSVG_UNITS_PC, + NSVG_UNITS_MM, + NSVG_UNITS_CM, + NSVG_UNITS_IN, + NSVG_UNITS_PERCENT, + NSVG_UNITS_EM, + NSVG_UNITS_EX +}; + +typedef struct NSVGcoordinate { + float value; + int units; +} NSVGcoordinate; + +typedef struct NSVGlinearData { + NSVGcoordinate x1, y1, x2, y2; +} NSVGlinearData; + +typedef struct NSVGradialData { + NSVGcoordinate cx, cy, r, fx, fy; +} NSVGradialData; + +typedef struct NSVGgradientData { + char id[64]; + char ref[64]; + char type; + union { + NSVGlinearData linear; + NSVGradialData radial; + }; + char spread; + char units; + float xform[6]; + int nstops; + NSVGgradientStop *stops; + struct NSVGgradientData *next; +} NSVGgradientData; + +typedef struct NSVGattrib { + char id[64]; + float xform[6]; + unsigned int fillColor; + unsigned int strokeColor; + float opacity; + float fillOpacity; + float strokeOpacity; + char fillGradient[64]; + char strokeGradient[64]; + float strokeWidth; + float strokeDashOffset; + float strokeDashArray[NSVG_MAX_DASHES]; + int strokeDashCount; + char strokeLineJoin; + char strokeLineCap; + float miterLimit; + char fillRule; + float fontSize; + unsigned int stopColor; + float stopOpacity; + float stopOffset; + char hasFill; + char hasStroke; + char visible; +} NSVGattrib; + +typedef struct NSVGparser { + NSVGattrib attr[NSVG_MAX_ATTR]; + int attrHead; + float *pts; + int npts; + int cpts; + NSVGpath *plist; + NSVGimage *image; + NSVGgradientData *gradients; + NSVGshape *shapesTail; + float viewMinx, viewMiny, viewWidth, viewHeight; + int alignX, alignY, alignType; + float dpi; + char pathFlag; + char defsFlag; + char unicodeFlag[NSVG_MAX_UNICODE_LEN]; + const char *horizAdvFlag; +} NSVGparser; + +static void nsvg__xformIdentity(float *t) +{ + t[0] = 1.0f; + t[1] = 0.0f; + t[2] = 0.0f; + t[3] = 1.0f; + t[4] = 0.0f; + t[5] = 0.0f; +} + +static void nsvg__xformSetTranslation(float *t, float tx, float ty) +{ + t[0] = 1.0f; + t[1] = 0.0f; + t[2] = 0.0f; + t[3] = 1.0f; + t[4] = tx; + t[5] = ty; +} + +static void nsvg__xformSetScale(float *t, float sx, float sy) +{ + t[0] = sx; + t[1] = 0.0f; + t[2] = 0.0f; + t[3] = sy; + t[4] = 0.0f; + t[5] = 0.0f; +} + +static void nsvg__xformSetSkewX(float *t, float a) +{ + t[0] = 1.0f; + t[1] = 0.0f; + t[2] = tanf(a); + t[3] = 1.0f; + t[4] = 0.0f; + t[5] = 0.0f; +} + +static void nsvg__xformSetSkewY(float *t, float a) +{ + t[0] = 1.0f; + t[1] = tanf(a); + t[2] = 0.0f; + t[3] = 1.0f; + t[4] = 0.0f; + t[5] = 0.0f; +} + +static void nsvg__xformSetRotation(float *t, float a) +{ + float cs = cosf(a), sn = sinf(a); + t[0] = cs; + t[1] = sn; + t[2] = -sn; + t[3] = cs; + t[4] = 0.0f; + t[5] = 0.0f; +} + +static void nsvg__xformMultiply(float *t, float *s) +{ + float t0 = t[0] * s[0] + t[1] * s[2]; + float t2 = t[2] * s[0] + t[3] * s[2]; + float t4 = t[4] * s[0] + t[5] * s[2] + s[4]; + t[1] = t[0] * s[1] + t[1] * s[3]; + t[3] = t[2] * s[1] + t[3] * s[3]; + t[5] = t[4] * s[1] + t[5] * s[3] + s[5]; + t[0] = t0; + t[2] = t2; + t[4] = t4; +} + +static void nsvg__xformInverse(float *inv, float *t) +{ + double invdet, det = (double)t[0] * t[3] - (double)t[2] * t[1]; + if (det > -1e-6 && det < 1e-6) { + nsvg__xformIdentity(t); + return; + } + invdet = 1.0 / det; + inv[0] = (float)(t[3] * invdet); + inv[2] = (float)(-t[2] * invdet); + inv[4] = (float)(((double)t[2] * t[5] - (double)t[3] * t[4]) * invdet); + inv[1] = (float)(-t[1] * invdet); + inv[3] = (float)(t[0] * invdet); + inv[5] = (float)(((double)t[1] * t[4] - (double)t[0] * t[5]) * invdet); +} + +static void nsvg__xformPremultiply(float *t, float *s) +{ + float s2[6]; + memcpy(s2, s, sizeof(float) * 6); + nsvg__xformMultiply(s2, t); + memcpy(t, s2, sizeof(float) * 6); +} + +static void nsvg__xformPoint(float *dx, float *dy, float x, float y, float *t) +{ + *dx = x * t[0] + y * t[2] + t[4]; + *dy = x * t[1] + y * t[3] + t[5]; +} + +static void nsvg__xformVec(float *dx, float *dy, float x, float y, float *t) +{ + *dx = x * t[0] + y * t[2]; + *dy = x * t[1] + y * t[3]; +} + +#define NSVG_EPSILON (1e-12) + +static int nsvg__ptInBounds(float *pt, float *bounds) +{ + return pt[0] >= bounds[0] && pt[0] <= bounds[2] && pt[1] >= bounds[1] && pt[1] <= bounds[3]; +} + +static double nsvg__evalBezier(double t, double p0, double p1, double p2, double p3) +{ + double it = 1.0 - t; + return it * it * it * p0 + 3.0 * it * it * t * p1 + 3.0 * it * t * t * p2 + t * t * t * p3; +} + +static void nsvg__curveBounds(float *bounds, float *curve) +{ + int i, j, count; + double roots[2], a, b, c, b2ac, t, v; + float *v0 = &curve[0]; + float *v1 = &curve[2]; + float *v2 = &curve[4]; + float *v3 = &curve[6]; + + // Start the bounding box by end points + bounds[0] = nsvg__minf(v0[0], v3[0]); + bounds[1] = nsvg__minf(v0[1], v3[1]); + bounds[2] = nsvg__maxf(v0[0], v3[0]); + bounds[3] = nsvg__maxf(v0[1], v3[1]); + + // Bezier curve fits inside the convex hull of it's control points. + // If control points are inside the bounds, we're done. + if (nsvg__ptInBounds(v1, bounds) && nsvg__ptInBounds(v2, bounds)) + return; + + // Add bezier curve inflection points in X and Y. + for (i = 0; i < 2; i++) { + a = -3.0 * v0[i] + 9.0 * v1[i] - 9.0 * v2[i] + 3.0 * v3[i]; + b = 6.0 * v0[i] - 12.0 * v1[i] + 6.0 * v2[i]; + c = 3.0 * v1[i] - 3.0 * v0[i]; + count = 0; + if (fabs(a) < NSVG_EPSILON) { + if (fabs(b) > NSVG_EPSILON) { + t = -c / b; + if (t > NSVG_EPSILON && t < 1.0 - NSVG_EPSILON) + roots[count++] = t; + } + } else { + b2ac = b * b - 4.0 * c * a; + if (b2ac > NSVG_EPSILON) { + t = (-b + sqrt(b2ac)) / (2.0 * a); + if (t > NSVG_EPSILON && t < 1.0 - NSVG_EPSILON) + roots[count++] = t; + t = (-b - sqrt(b2ac)) / (2.0 * a); + if (t > NSVG_EPSILON && t < 1.0 - NSVG_EPSILON) + roots[count++] = t; + } + } + for (j = 0; j < count; j++) { + v = nsvg__evalBezier(roots[j], v0[i], v1[i], v2[i], v3[i]); + bounds[0 + i] = nsvg__minf(bounds[0 + i], (float)v); + bounds[2 + i] = nsvg__maxf(bounds[2 + i], (float)v); + } + } +} + +static NSVGparser *nsvg__createParser() +{ + NSVGparser *p; + p = (NSVGparser *)malloc(sizeof(NSVGparser)); + if (p == NULL) + goto error; + memset(p, 0, sizeof(NSVGparser)); + + p->image = (NSVGimage *)malloc(sizeof(NSVGimage)); + if (p->image == NULL) + goto error; + memset(p->image, 0, sizeof(NSVGimage)); + + // Init style + nsvg__xformIdentity(p->attr[0].xform); + memset(p->attr[0].id, 0, sizeof p->attr[0].id); + p->attr[0].fillColor = NSVG_RGB(0, 0, 0); + p->attr[0].strokeColor = NSVG_RGB(0, 0, 0); + p->attr[0].opacity = 1; + p->attr[0].fillOpacity = 1; + p->attr[0].strokeOpacity = 1; + p->attr[0].stopOpacity = 1; + p->attr[0].strokeWidth = 1; + p->attr[0].strokeLineJoin = NSVG_JOIN_MITER; + p->attr[0].strokeLineCap = NSVG_CAP_BUTT; + p->attr[0].miterLimit = 4; + p->attr[0].fillRule = NSVG_FILLRULE_NONZERO; + p->attr[0].hasFill = 1; + p->attr[0].visible = 1; + + return p; + +error: + if (p) { + if (p->image) + free(p->image); + free(p); + } + return NULL; +} + +static void nsvg__deletePaths(NSVGpath *path) +{ + while (path) { + NSVGpath *next = path->next; + if (path->pts != NULL) + free(path->pts); + free(path); + path = next; + } +} + +static void nsvg__deletePaint(NSVGpaint *paint) +{ + if (paint->type == NSVG_PAINT_LINEAR_GRADIENT || paint->type == NSVG_PAINT_RADIAL_GRADIENT) + free(paint->gradient); +} + +static void nsvg__deleteGradientData(NSVGgradientData *grad) +{ + NSVGgradientData *next; + while (grad != NULL) { + next = grad->next; + free(grad->stops); + free(grad); + grad = next; + } +} + +static void nsvg__deleteParser(NSVGparser *p) +{ + if (p != NULL) { + nsvg__deletePaths(p->plist); + nsvg__deleteGradientData(p->gradients); + nsvgDelete(p->image); + free(p->pts); + free(p); + } +} + +static void nsvg__resetPath(NSVGparser *p) +{ + p->npts = 0; +} + +static void nsvg__addPoint(NSVGparser *p, float x, float y) +{ + if (p->npts + 1 > p->cpts) { + p->cpts = p->cpts ? p->cpts * 2 : 8; + p->pts = (float *)realloc(p->pts, p->cpts * 2 * sizeof(float)); + if (!p->pts) + return; + } + p->pts[p->npts * 2 + 0] = x; + p->pts[p->npts * 2 + 1] = y; + p->npts++; +} + +static void nsvg__moveTo(NSVGparser *p, float x, float y) +{ + if (p->npts > 0) { + p->pts[(p->npts - 1) * 2 + 0] = x; + p->pts[(p->npts - 1) * 2 + 1] = y; + } else { + nsvg__addPoint(p, x, y); + } +} + +static void nsvg__lineTo(NSVGparser *p, float x, float y) +{ + float px, py, dx, dy; + if (p->npts > 0) { + px = p->pts[(p->npts - 1) * 2 + 0]; + py = p->pts[(p->npts - 1) * 2 + 1]; + dx = x - px; + dy = y - py; + nsvg__addPoint(p, px + dx / 3.0f, py + dy / 3.0f); + nsvg__addPoint(p, x - dx / 3.0f, y - dy / 3.0f); + nsvg__addPoint(p, x, y); + } +} + +static void nsvg__cubicBezTo(NSVGparser *p, float cpx1, float cpy1, float cpx2, float cpy2, float x, + float y) +{ + if (p->npts > 0) { + nsvg__addPoint(p, cpx1, cpy1); + nsvg__addPoint(p, cpx2, cpy2); + nsvg__addPoint(p, x, y); + } +} + +static NSVGattrib *nsvg__getAttr(NSVGparser *p) +{ + return &p->attr[p->attrHead]; +} + +static void nsvg__pushAttr(NSVGparser *p) +{ + if (p->attrHead < NSVG_MAX_ATTR - 1) { + p->attrHead++; + memcpy(&p->attr[p->attrHead], &p->attr[p->attrHead - 1], sizeof(NSVGattrib)); + } +} + +static void nsvg__popAttr(NSVGparser *p) +{ + if (p->attrHead > 0) + p->attrHead--; +} + +static float nsvg__actualOrigX(NSVGparser *p) +{ + return p->viewMinx; +} + +static float nsvg__actualOrigY(NSVGparser *p) +{ + return p->viewMiny; +} + +static float nsvg__actualWidth(NSVGparser *p) +{ + return p->viewWidth; +} + +static float nsvg__actualHeight(NSVGparser *p) +{ + return p->viewHeight; +} + +static float nsvg__actualLength(NSVGparser *p) +{ + float w = nsvg__actualWidth(p), h = nsvg__actualHeight(p); + return sqrtf(w * w + h * h) / sqrtf(2.0f); +} + +static float nsvg__convertToPixels(NSVGparser *p, NSVGcoordinate c, float orig, float length) +{ + NSVGattrib *attr = nsvg__getAttr(p); + switch (c.units) { + case NSVG_UNITS_USER: + return c.value; + case NSVG_UNITS_PX: + return c.value; + case NSVG_UNITS_PT: + return c.value / 72.0f * p->dpi; + case NSVG_UNITS_PC: + return c.value / 6.0f * p->dpi; + case NSVG_UNITS_MM: + return c.value / 25.4f * p->dpi; + case NSVG_UNITS_CM: + return c.value / 2.54f * p->dpi; + case NSVG_UNITS_IN: + return c.value * p->dpi; + case NSVG_UNITS_EM: + return c.value * attr->fontSize; + case NSVG_UNITS_EX: + return c.value * attr->fontSize * 0.52f; // x-height of Helvetica. + case NSVG_UNITS_PERCENT: + return orig + c.value / 100.0f * length; + default: + return c.value; + } + return c.value; +} + +static NSVGgradientData *nsvg__findGradientData(NSVGparser *p, const char *id) +{ + NSVGgradientData *grad = p->gradients; + if (id == NULL || *id == '\0') + return NULL; + while (grad != NULL) { + if (strcmp(grad->id, id) == 0) + return grad; + grad = grad->next; + } + return NULL; +} + +static NSVGgradient *nsvg__createGradient(NSVGparser *p, const char *id, const float *localBounds, + char *paintType) +{ + NSVGattrib *attr = nsvg__getAttr(p); + NSVGgradientData *data = NULL; + NSVGgradientData *ref = NULL; + NSVGgradientStop *stops = NULL; + NSVGgradient *grad; + float ox, oy, sw, sh, sl; + int nstops = 0; + int refIter; + + data = nsvg__findGradientData(p, id); + if (data == NULL) + return NULL; + + // TODO: use ref to fill in all unset values too. + ref = data; + refIter = 0; + while (ref != NULL) { + NSVGgradientData *nextRef = NULL; + if (stops == NULL && ref->stops != NULL) { + stops = ref->stops; + nstops = ref->nstops; + break; + } + nextRef = nsvg__findGradientData(p, ref->ref); + if (nextRef == ref) + break; // prevent infite loops on malformed data + ref = nextRef; + refIter++; + if (refIter > 32) + break; // prevent infite loops on malformed data + } + if (stops == NULL) + return NULL; + + grad = (NSVGgradient *)malloc(sizeof(NSVGgradient) + + sizeof(NSVGgradientStop) * (nstops - 1)); + if (grad == NULL) + return NULL; + + // The shape width and height. + if (data->units == NSVG_OBJECT_SPACE) { + ox = localBounds[0]; + oy = localBounds[1]; + sw = localBounds[2] - localBounds[0]; + sh = localBounds[3] - localBounds[1]; + } else { + ox = nsvg__actualOrigX(p); + oy = nsvg__actualOrigY(p); + sw = nsvg__actualWidth(p); + sh = nsvg__actualHeight(p); + } + sl = sqrtf(sw * sw + sh * sh) / sqrtf(2.0f); + + if (data->type == NSVG_PAINT_LINEAR_GRADIENT) { + float x1, y1, x2, y2, dx, dy; + x1 = nsvg__convertToPixels(p, data->linear.x1, ox, sw); + y1 = nsvg__convertToPixels(p, data->linear.y1, oy, sh); + x2 = nsvg__convertToPixels(p, data->linear.x2, ox, sw); + y2 = nsvg__convertToPixels(p, data->linear.y2, oy, sh); + // Calculate transform aligned to the line + dx = x2 - x1; + dy = y2 - y1; + grad->xform[0] = dy; + grad->xform[1] = -dx; + grad->xform[2] = dx; + grad->xform[3] = dy; + grad->xform[4] = x1; + grad->xform[5] = y1; + } else { + float cx, cy, fx, fy, r; + cx = nsvg__convertToPixels(p, data->radial.cx, ox, sw); + cy = nsvg__convertToPixels(p, data->radial.cy, oy, sh); + fx = nsvg__convertToPixels(p, data->radial.fx, ox, sw); + fy = nsvg__convertToPixels(p, data->radial.fy, oy, sh); + r = nsvg__convertToPixels(p, data->radial.r, 0, sl); + // Calculate transform aligned to the circle + grad->xform[0] = r; + grad->xform[1] = 0; + grad->xform[2] = 0; + grad->xform[3] = r; + grad->xform[4] = cx; + grad->xform[5] = cy; + grad->fx = fx / r; + grad->fy = fy / r; + } + + nsvg__xformMultiply(grad->xform, data->xform); + nsvg__xformMultiply(grad->xform, attr->xform); + + grad->spread = data->spread; + memcpy(grad->stops, stops, nstops * sizeof(NSVGgradientStop)); + grad->nstops = nstops; + + *paintType = data->type; + + return grad; +} + +static float nsvg__getAverageScale(float *t) +{ + float sx = sqrtf(t[0] * t[0] + t[2] * t[2]); + float sy = sqrtf(t[1] * t[1] + t[3] * t[3]); + return (sx + sy) * 0.5f; +} + +static void nsvg__getLocalBounds(float *bounds, NSVGshape *shape, float *xform) +{ + NSVGpath *path; + float curve[4 * 2], curveBounds[4]; + int i, first = 1; + for (path = shape->paths; path != NULL; path = path->next) { + nsvg__xformPoint(&curve[0], &curve[1], path->pts[0], path->pts[1], xform); + for (i = 0; i < path->npts - 1; i += 3) { + nsvg__xformPoint(&curve[2], &curve[3], path->pts[(i + 1) * 2], + path->pts[(i + 1) * 2 + 1], xform); + nsvg__xformPoint(&curve[4], &curve[5], path->pts[(i + 2) * 2], + path->pts[(i + 2) * 2 + 1], xform); + nsvg__xformPoint(&curve[6], &curve[7], path->pts[(i + 3) * 2], + path->pts[(i + 3) * 2 + 1], xform); + nsvg__curveBounds(curveBounds, curve); + if (first) { + bounds[0] = curveBounds[0]; + bounds[1] = curveBounds[1]; + bounds[2] = curveBounds[2]; + bounds[3] = curveBounds[3]; + first = 0; + } else { + bounds[0] = nsvg__minf(bounds[0], curveBounds[0]); + bounds[1] = nsvg__minf(bounds[1], curveBounds[1]); + bounds[2] = nsvg__maxf(bounds[2], curveBounds[2]); + bounds[3] = nsvg__maxf(bounds[3], curveBounds[3]); + } + curve[0] = curve[6]; + curve[1] = curve[7]; + } + } +} + +static void nsvg__addShape(NSVGparser *p) +{ + NSVGattrib *attr = nsvg__getAttr(p); + float scale = 1.0f; + NSVGshape *shape; + char *end; + NSVGpath *path; + int i; + + if (p->plist == NULL) + return; + + shape = (NSVGshape *)malloc(sizeof(NSVGshape)); + if (shape == NULL) + goto error; + memset(shape, 0, sizeof(NSVGshape)); + + memcpy(shape->id, attr->id, sizeof shape->id); + scale = nsvg__getAverageScale(attr->xform); + shape->strokeWidth = attr->strokeWidth * scale; + shape->strokeDashOffset = attr->strokeDashOffset * scale; + shape->strokeDashCount = (char)attr->strokeDashCount; + for (i = 0; i < attr->strokeDashCount; i++) + shape->strokeDashArray[i] = attr->strokeDashArray[i] * scale; + shape->strokeLineJoin = attr->strokeLineJoin; + shape->strokeLineCap = attr->strokeLineCap; + shape->miterLimit = attr->miterLimit; + shape->fillRule = attr->fillRule; + shape->opacity = attr->opacity; + + if (p->unicodeFlag[0]) { + strcat(shape->unicode, p->unicodeFlag); + if (p->horizAdvFlag) { + shape->horizAdvX = strtol(p->horizAdvFlag, &end, 10); + if (end == p->horizAdvFlag) + shape->horizAdvX = 0; + } + if (shape->horizAdvX == 0) { + shape->horizAdvX = p->image->defaultHorizAdv; + } + p->unicodeFlag[0] = '\0'; + p->horizAdvFlag = NULL; + } + + shape->paths = p->plist; + p->plist = NULL; + + // Calculate shape bounds + shape->bounds[0] = shape->paths->bounds[0]; + shape->bounds[1] = shape->paths->bounds[1]; + shape->bounds[2] = shape->paths->bounds[2]; + shape->bounds[3] = shape->paths->bounds[3]; + for (path = shape->paths->next; path != NULL; path = path->next) { + shape->bounds[0] = nsvg__minf(shape->bounds[0], path->bounds[0]); + shape->bounds[1] = nsvg__minf(shape->bounds[1], path->bounds[1]); + shape->bounds[2] = nsvg__maxf(shape->bounds[2], path->bounds[2]); + shape->bounds[3] = nsvg__maxf(shape->bounds[3], path->bounds[3]); + } + + // Set fill + if (attr->hasFill == 0) { + shape->fill.type = NSVG_PAINT_NONE; + } else if (attr->hasFill == 1) { + shape->fill.type = NSVG_PAINT_COLOR; + shape->fill.color = attr->fillColor; + shape->fill.color |= (unsigned int)(attr->fillOpacity * 255) << 24; + } else if (attr->hasFill == 2) { + float inv[6], localBounds[4]; + nsvg__xformInverse(inv, attr->xform); + nsvg__getLocalBounds(localBounds, shape, inv); + shape->fill.gradient = + nsvg__createGradient(p, attr->fillGradient, localBounds, &shape->fill.type); + if (shape->fill.gradient == NULL) { + shape->fill.type = NSVG_PAINT_NONE; + } + } + + // Set stroke + if (attr->hasStroke == 0) { + shape->stroke.type = NSVG_PAINT_NONE; + } else if (attr->hasStroke == 1) { + shape->stroke.type = NSVG_PAINT_COLOR; + shape->stroke.color = attr->strokeColor; + shape->stroke.color |= (unsigned int)(attr->strokeOpacity * 255) << 24; + } else if (attr->hasStroke == 2) { + float inv[6], localBounds[4]; + nsvg__xformInverse(inv, attr->xform); + nsvg__getLocalBounds(localBounds, shape, inv); + shape->stroke.gradient = nsvg__createGradient(p, attr->strokeGradient, localBounds, + &shape->stroke.type); + if (shape->stroke.gradient == NULL) + shape->stroke.type = NSVG_PAINT_NONE; + } + + // Set flags + shape->flags = (attr->visible ? NSVG_FLAGS_VISIBLE : 0x00); + + // Add to tail + if (p->image->shapes == NULL) + p->image->shapes = shape; + else + p->shapesTail->next = shape; + p->shapesTail = shape; + + return; + +error: + if (shape) + free(shape); +} + +static void nsvg__addPath(NSVGparser *p, char closed) +{ + NSVGattrib *attr = nsvg__getAttr(p); + NSVGpath *path = NULL; + float bounds[4]; + float *curve; + int i; + + if (p->npts < 4) + return; + + if (closed) + nsvg__lineTo(p, p->pts[0], p->pts[1]); + + // Expect 1 + N*3 points (N = number of cubic bezier segments). + if ((p->npts % 3) != 1) + return; + + path = (NSVGpath *)malloc(sizeof(NSVGpath)); + if (path == NULL) + goto error; + memset(path, 0, sizeof(NSVGpath)); + + path->pts = (float *)malloc(p->npts * 2 * sizeof(float)); + if (path->pts == NULL) + goto error; + path->closed = closed; + path->npts = p->npts; + + // Transform path. + for (i = 0; i < p->npts; ++i) + nsvg__xformPoint(&path->pts[i * 2], &path->pts[i * 2 + 1], p->pts[i * 2], + p->pts[i * 2 + 1], attr->xform); + + // Find bounds + for (i = 0; i < path->npts - 1; i += 3) { + curve = &path->pts[i * 2]; + nsvg__curveBounds(bounds, curve); + if (i == 0) { + path->bounds[0] = bounds[0]; + path->bounds[1] = bounds[1]; + path->bounds[2] = bounds[2]; + path->bounds[3] = bounds[3]; + } else { + path->bounds[0] = nsvg__minf(path->bounds[0], bounds[0]); + path->bounds[1] = nsvg__minf(path->bounds[1], bounds[1]); + path->bounds[2] = nsvg__maxf(path->bounds[2], bounds[2]); + path->bounds[3] = nsvg__maxf(path->bounds[3], bounds[3]); + } + } + + path->next = p->plist; + p->plist = path; + + return; + +error: + if (path != NULL) { + if (path->pts != NULL) + free(path->pts); + free(path); + } +} + +// We roll our own string to float because the std library one uses locale and messes things up. +static double nsvg__atof(const char *s) +{ + char *cur = (char *)s; + char *end = NULL; + double res = 0.0, sign = 1.0; + long long intPart = 0, fracPart = 0; + char hasIntPart = 0, hasFracPart = 0; + + // Parse optional sign + if (*cur == '+') { + cur++; + } else if (*cur == '-') { + sign = -1; + cur++; + } + + // Parse integer part + if (nsvg__isdigit(*cur)) { + // Parse digit sequence + intPart = strtoll(cur, &end, 10); + if (cur != end) { + res = (double)intPart; + hasIntPart = 1; + cur = end; + } + } + + // Parse fractional part. + if (*cur == '.') { + cur++; // Skip '.' + if (nsvg__isdigit(*cur)) { + // Parse digit sequence + fracPart = strtoll(cur, &end, 10); + if (cur != end) { + res += (double)fracPart / pow(10.0, (double)(end - cur)); + hasFracPart = 1; + cur = end; + } + } + } + + // A valid number should have integer or fractional part. + if (!hasIntPart && !hasFracPart) + return 0.0; + + // Parse optional exponent + if (*cur == 'e' || *cur == 'E') { + long expPart = 0; + cur++; // skip 'E' + expPart = strtol(cur, &end, 10); // Parse digit sequence with sign + if (cur != end) { + res *= pow(10.0, (double)expPart); + } + } + + return res * sign; +} + +static const char *nsvg__parseNumber(const char *s, char *it, const int size) +{ + const int last = size - 1; + int i = 0; + + // sign + if (*s == '-' || *s == '+') { + if (i < last) + it[i++] = *s; + s++; + } + // integer part + while (*s && nsvg__isdigit(*s)) { + if (i < last) + it[i++] = *s; + s++; + } + if (*s == '.') { + // decimal point + if (i < last) + it[i++] = *s; + s++; + // fraction part + while (*s && nsvg__isdigit(*s)) { + if (i < last) + it[i++] = *s; + s++; + } + } + // exponent + if ((*s == 'e' || *s == 'E') && (s[1] != 'm' && s[1] != 'x')) { + if (i < last) + it[i++] = *s; + s++; + if (*s == '-' || *s == '+') { + if (i < last) + it[i++] = *s; + s++; + } + while (*s && nsvg__isdigit(*s)) { + if (i < last) + it[i++] = *s; + s++; + } + } + it[i] = '\0'; + + return s; +} + +static const char *nsvg__getNextPathItem(const char *s, char *it) +{ + it[0] = '\0'; + // Skip white spaces and commas + while (*s && (nsvg__isspace(*s) || *s == ',')) + s++; + if (!*s) + return s; + if (*s == '-' || *s == '+' || *s == '.' || nsvg__isdigit(*s)) { + s = nsvg__parseNumber(s, it, 64); + } else { + // Parse command + it[0] = *s++; + it[1] = '\0'; + return s; + } + + return s; +} + +static unsigned int nsvg__parseColorHex(const char *str) +{ + unsigned int r = 0, g = 0, b = 0; + if (sscanf(str, "#%2x%2x%2x", &r, &g, &b) == 3) // 2 digit hex + return NSVG_RGB(r, g, b); + if (sscanf(str, "#%1x%1x%1x", &r, &g, &b) == 3) // 1 digit hex, e.g. #abc -> 0xccbbaa + return NSVG_RGB(r * 17, g * 17, b * 17); // same effect as (r<<4|r), (g<<4|g), .. + return NSVG_RGB(128, 128, 128); +} + +static unsigned int nsvg__parseColorRGB(const char *str) +{ + unsigned int r = 0, g = 0, b = 0; + if (sscanf(str, "rgb(%u, %u, %u)", &r, &g, &b) == 3) // decimal integers + return NSVG_RGB(r, g, b); + if (sscanf(str, "rgb(%u%%, %u%%, %u%%)", &r, &g, &b) == 3) // decimal integer percentage + return NSVG_RGB(r * 255 / 100, g * 255 / 100, b * 255 / 100); + return NSVG_RGB(128, 128, 128); +} + +typedef struct NSVGNamedColor { + const char *name; + unsigned int color; +} NSVGNamedColor; + +NSVGNamedColor nsvg__colors[] = { + + { "red", NSVG_RGB(255, 0, 0) }, + { "green", NSVG_RGB(0, 128, 0) }, + { "blue", NSVG_RGB(0, 0, 255) }, + { "yellow", NSVG_RGB(255, 255, 0) }, + { "cyan", NSVG_RGB(0, 255, 255) }, + { "magenta", NSVG_RGB(255, 0, 255) }, + { "black", NSVG_RGB(0, 0, 0) }, + { "grey", NSVG_RGB(128, 128, 128) }, + { "gray", NSVG_RGB(128, 128, 128) }, + { "white", NSVG_RGB(255, 255, 255) }, + +#ifdef NANOSVG_ALL_COLOR_KEYWORDS + { "aliceblue", NSVG_RGB(240, 248, 255) }, + { "antiquewhite", NSVG_RGB(250, 235, 215) }, + { "aqua", NSVG_RGB(0, 255, 255) }, + { "aquamarine", NSVG_RGB(127, 255, 212) }, + { "azure", NSVG_RGB(240, 255, 255) }, + { "beige", NSVG_RGB(245, 245, 220) }, + { "bisque", NSVG_RGB(255, 228, 196) }, + { "blanchedalmond", NSVG_RGB(255, 235, 205) }, + { "blueviolet", NSVG_RGB(138, 43, 226) }, + { "brown", NSVG_RGB(165, 42, 42) }, + { "burlywood", NSVG_RGB(222, 184, 135) }, + { "cadetblue", NSVG_RGB(95, 158, 160) }, + { "chartreuse", NSVG_RGB(127, 255, 0) }, + { "chocolate", NSVG_RGB(210, 105, 30) }, + { "coral", NSVG_RGB(255, 127, 80) }, + { "cornflowerblue", NSVG_RGB(100, 149, 237) }, + { "cornsilk", NSVG_RGB(255, 248, 220) }, + { "crimson", NSVG_RGB(220, 20, 60) }, + { "darkblue", NSVG_RGB(0, 0, 139) }, + { "darkcyan", NSVG_RGB(0, 139, 139) }, + { "darkgoldenrod", NSVG_RGB(184, 134, 11) }, + { "darkgray", NSVG_RGB(169, 169, 169) }, + { "darkgreen", NSVG_RGB(0, 100, 0) }, + { "darkgrey", NSVG_RGB(169, 169, 169) }, + { "darkkhaki", NSVG_RGB(189, 183, 107) }, + { "darkmagenta", NSVG_RGB(139, 0, 139) }, + { "darkolivegreen", NSVG_RGB(85, 107, 47) }, + { "darkorange", NSVG_RGB(255, 140, 0) }, + { "darkorchid", NSVG_RGB(153, 50, 204) }, + { "darkred", NSVG_RGB(139, 0, 0) }, + { "darksalmon", NSVG_RGB(233, 150, 122) }, + { "darkseagreen", NSVG_RGB(143, 188, 143) }, + { "darkslateblue", NSVG_RGB(72, 61, 139) }, + { "darkslategray", NSVG_RGB(47, 79, 79) }, + { "darkslategrey", NSVG_RGB(47, 79, 79) }, + { "darkturquoise", NSVG_RGB(0, 206, 209) }, + { "darkviolet", NSVG_RGB(148, 0, 211) }, + { "deeppink", NSVG_RGB(255, 20, 147) }, + { "deepskyblue", NSVG_RGB(0, 191, 255) }, + { "dimgray", NSVG_RGB(105, 105, 105) }, + { "dimgrey", NSVG_RGB(105, 105, 105) }, + { "dodgerblue", NSVG_RGB(30, 144, 255) }, + { "firebrick", NSVG_RGB(178, 34, 34) }, + { "floralwhite", NSVG_RGB(255, 250, 240) }, + { "forestgreen", NSVG_RGB(34, 139, 34) }, + { "fuchsia", NSVG_RGB(255, 0, 255) }, + { "gainsboro", NSVG_RGB(220, 220, 220) }, + { "ghostwhite", NSVG_RGB(248, 248, 255) }, + { "gold", NSVG_RGB(255, 215, 0) }, + { "goldenrod", NSVG_RGB(218, 165, 32) }, + { "greenyellow", NSVG_RGB(173, 255, 47) }, + { "honeydew", NSVG_RGB(240, 255, 240) }, + { "hotpink", NSVG_RGB(255, 105, 180) }, + { "indianred", NSVG_RGB(205, 92, 92) }, + { "indigo", NSVG_RGB(75, 0, 130) }, + { "ivory", NSVG_RGB(255, 255, 240) }, + { "khaki", NSVG_RGB(240, 230, 140) }, + { "lavender", NSVG_RGB(230, 230, 250) }, + { "lavenderblush", NSVG_RGB(255, 240, 245) }, + { "lawngreen", NSVG_RGB(124, 252, 0) }, + { "lemonchiffon", NSVG_RGB(255, 250, 205) }, + { "lightblue", NSVG_RGB(173, 216, 230) }, + { "lightcoral", NSVG_RGB(240, 128, 128) }, + { "lightcyan", NSVG_RGB(224, 255, 255) }, + { "lightgoldenrodyellow", NSVG_RGB(250, 250, 210) }, + { "lightgray", NSVG_RGB(211, 211, 211) }, + { "lightgreen", NSVG_RGB(144, 238, 144) }, + { "lightgrey", NSVG_RGB(211, 211, 211) }, + { "lightpink", NSVG_RGB(255, 182, 193) }, + { "lightsalmon", NSVG_RGB(255, 160, 122) }, + { "lightseagreen", NSVG_RGB(32, 178, 170) }, + { "lightskyblue", NSVG_RGB(135, 206, 250) }, + { "lightslategray", NSVG_RGB(119, 136, 153) }, + { "lightslategrey", NSVG_RGB(119, 136, 153) }, + { "lightsteelblue", NSVG_RGB(176, 196, 222) }, + { "lightyellow", NSVG_RGB(255, 255, 224) }, + { "lime", NSVG_RGB(0, 255, 0) }, + { "limegreen", NSVG_RGB(50, 205, 50) }, + { "linen", NSVG_RGB(250, 240, 230) }, + { "maroon", NSVG_RGB(128, 0, 0) }, + { "mediumaquamarine", NSVG_RGB(102, 205, 170) }, + { "mediumblue", NSVG_RGB(0, 0, 205) }, + { "mediumorchid", NSVG_RGB(186, 85, 211) }, + { "mediumpurple", NSVG_RGB(147, 112, 219) }, + { "mediumseagreen", NSVG_RGB(60, 179, 113) }, + { "mediumslateblue", NSVG_RGB(123, 104, 238) }, + { "mediumspringgreen", NSVG_RGB(0, 250, 154) }, + { "mediumturquoise", NSVG_RGB(72, 209, 204) }, + { "mediumvioletred", NSVG_RGB(199, 21, 133) }, + { "midnightblue", NSVG_RGB(25, 25, 112) }, + { "mintcream", NSVG_RGB(245, 255, 250) }, + { "mistyrose", NSVG_RGB(255, 228, 225) }, + { "moccasin", NSVG_RGB(255, 228, 181) }, + { "navajowhite", NSVG_RGB(255, 222, 173) }, + { "navy", NSVG_RGB(0, 0, 128) }, + { "oldlace", NSVG_RGB(253, 245, 230) }, + { "olive", NSVG_RGB(128, 128, 0) }, + { "olivedrab", NSVG_RGB(107, 142, 35) }, + { "orange", NSVG_RGB(255, 165, 0) }, + { "orangered", NSVG_RGB(255, 69, 0) }, + { "orchid", NSVG_RGB(218, 112, 214) }, + { "palegoldenrod", NSVG_RGB(238, 232, 170) }, + { "palegreen", NSVG_RGB(152, 251, 152) }, + { "paleturquoise", NSVG_RGB(175, 238, 238) }, + { "palevioletred", NSVG_RGB(219, 112, 147) }, + { "papayawhip", NSVG_RGB(255, 239, 213) }, + { "peachpuff", NSVG_RGB(255, 218, 185) }, + { "peru", NSVG_RGB(205, 133, 63) }, + { "pink", NSVG_RGB(255, 192, 203) }, + { "plum", NSVG_RGB(221, 160, 221) }, + { "powderblue", NSVG_RGB(176, 224, 230) }, + { "purple", NSVG_RGB(128, 0, 128) }, + { "rosybrown", NSVG_RGB(188, 143, 143) }, + { "royalblue", NSVG_RGB(65, 105, 225) }, + { "saddlebrown", NSVG_RGB(139, 69, 19) }, + { "salmon", NSVG_RGB(250, 128, 114) }, + { "sandybrown", NSVG_RGB(244, 164, 96) }, + { "seagreen", NSVG_RGB(46, 139, 87) }, + { "seashell", NSVG_RGB(255, 245, 238) }, + { "sienna", NSVG_RGB(160, 82, 45) }, + { "silver", NSVG_RGB(192, 192, 192) }, + { "skyblue", NSVG_RGB(135, 206, 235) }, + { "slateblue", NSVG_RGB(106, 90, 205) }, + { "slategray", NSVG_RGB(112, 128, 144) }, + { "slategrey", NSVG_RGB(112, 128, 144) }, + { "snow", NSVG_RGB(255, 250, 250) }, + { "springgreen", NSVG_RGB(0, 255, 127) }, + { "steelblue", NSVG_RGB(70, 130, 180) }, + { "tan", NSVG_RGB(210, 180, 140) }, + { "teal", NSVG_RGB(0, 128, 128) }, + { "thistle", NSVG_RGB(216, 191, 216) }, + { "tomato", NSVG_RGB(255, 99, 71) }, + { "turquoise", NSVG_RGB(64, 224, 208) }, + { "violet", NSVG_RGB(238, 130, 238) }, + { "wheat", NSVG_RGB(245, 222, 179) }, + { "whitesmoke", NSVG_RGB(245, 245, 245) }, + { "yellowgreen", NSVG_RGB(154, 205, 50) }, +#endif +}; + +static unsigned int nsvg__parseColorName(const char *str) +{ + int i, ncolors = sizeof(nsvg__colors) / sizeof(NSVGNamedColor); + + for (i = 0; i < ncolors; i++) { + if (strcmp(nsvg__colors[i].name, str) == 0) { + return nsvg__colors[i].color; + } + } + + return NSVG_RGB(128, 128, 128); +} + +static unsigned int nsvg__parseColor(const char *str) +{ + size_t len = 0; + while (*str == ' ') + ++str; + len = strlen(str); + if (len >= 1 && *str == '#') + return nsvg__parseColorHex(str); + else if (len >= 4 && str[0] == 'r' && str[1] == 'g' && str[2] == 'b' && str[3] == '(') + return nsvg__parseColorRGB(str); + return nsvg__parseColorName(str); +} + +static float nsvg__parseOpacity(const char *str) +{ + float val = nsvg__atof(str); + if (val < 0.0f) + val = 0.0f; + if (val > 1.0f) + val = 1.0f; + return val; +} + +static float nsvg__parseMiterLimit(const char *str) +{ + float val = nsvg__atof(str); + if (val < 0.0f) + val = 0.0f; + return val; +} + +static int nsvg__parseUnits(const char *units) +{ + if (units[0] == 'p' && units[1] == 'x') + return NSVG_UNITS_PX; + else if (units[0] == 'p' && units[1] == 't') + return NSVG_UNITS_PT; + else if (units[0] == 'p' && units[1] == 'c') + return NSVG_UNITS_PC; + else if (units[0] == 'm' && units[1] == 'm') + return NSVG_UNITS_MM; + else if (units[0] == 'c' && units[1] == 'm') + return NSVG_UNITS_CM; + else if (units[0] == 'i' && units[1] == 'n') + return NSVG_UNITS_IN; + else if (units[0] == '%') + return NSVG_UNITS_PERCENT; + else if (units[0] == 'e' && units[1] == 'm') + return NSVG_UNITS_EM; + else if (units[0] == 'e' && units[1] == 'x') + return NSVG_UNITS_EX; + return NSVG_UNITS_USER; +} + +static int nsvg__isCoordinate(const char *s) +{ + // optional sign + if (*s == '-' || *s == '+') + s++; + // must have at least one digit, or start by a dot + return (nsvg__isdigit(*s) || *s == '.'); +} + +static NSVGcoordinate nsvg__parseCoordinateRaw(const char *str) +{ + NSVGcoordinate coord = { 0, NSVG_UNITS_USER }; + char buf[64]; + coord.units = nsvg__parseUnits(nsvg__parseNumber(str, buf, 64)); + coord.value = nsvg__atof(buf); + return coord; +} + +static NSVGcoordinate nsvg__coord(float v, int units) +{ + NSVGcoordinate coord = { v, units }; + return coord; +} + +static float nsvg__parseCoordinate(NSVGparser *p, const char *str, float orig, float length) +{ + NSVGcoordinate coord = nsvg__parseCoordinateRaw(str); + return nsvg__convertToPixels(p, coord, orig, length); +} + +static int nsvg__parseTransformArgs(const char *str, float *args, int maxNa, int *na) +{ + const char *end; + const char *ptr; + char it[64]; + + *na = 0; + ptr = str; + while (*ptr && *ptr != '(') + ++ptr; + if (*ptr == 0) + return 1; + end = ptr; + while (*end && *end != ')') + ++end; + if (*end == 0) + return 1; + + while (ptr < end) { + if (*ptr == '-' || *ptr == '+' || *ptr == '.' || nsvg__isdigit(*ptr)) { + if (*na >= maxNa) + return 0; + ptr = nsvg__parseNumber(ptr, it, 64); + args[(*na)++] = (float)nsvg__atof(it); + } else { + ++ptr; + } + } + return (int)(end - str); +} + +static int nsvg__parseMatrix(float *xform, const char *str) +{ + float t[6]; + int na = 0; + int len = nsvg__parseTransformArgs(str, t, 6, &na); + if (na != 6) + return len; + memcpy(xform, t, sizeof(float) * 6); + return len; +} + +static int nsvg__parseTranslate(float *xform, const char *str) +{ + float args[2]; + float t[6]; + int na = 0; + int len = nsvg__parseTransformArgs(str, args, 2, &na); + if (na == 1) + args[1] = 0.0; + + nsvg__xformSetTranslation(t, args[0], args[1]); + memcpy(xform, t, sizeof(float) * 6); + return len; +} + +static int nsvg__parseScale(float *xform, const char *str) +{ + float args[2]; + int na = 0; + float t[6]; + int len = nsvg__parseTransformArgs(str, args, 2, &na); + if (na == 1) + args[1] = args[0]; + nsvg__xformSetScale(t, args[0], args[1]); + memcpy(xform, t, sizeof(float) * 6); + return len; +} + +static int nsvg__parseSkewX(float *xform, const char *str) +{ + float args[1]; + int na = 0; + float t[6]; + int len = nsvg__parseTransformArgs(str, args, 1, &na); + nsvg__xformSetSkewX(t, args[0] / 180.0f * NSVG_PI); + memcpy(xform, t, sizeof(float) * 6); + return len; +} + +static int nsvg__parseSkewY(float *xform, const char *str) +{ + float args[1]; + int na = 0; + float t[6]; + int len = nsvg__parseTransformArgs(str, args, 1, &na); + nsvg__xformSetSkewY(t, args[0] / 180.0f * NSVG_PI); + memcpy(xform, t, sizeof(float) * 6); + return len; +} + +static int nsvg__parseRotate(float *xform, const char *str) +{ + float args[3]; + int na = 0; + float m[6]; + float t[6]; + int len = nsvg__parseTransformArgs(str, args, 3, &na); + if (na == 1) + args[1] = args[2] = 0.0f; + nsvg__xformIdentity(m); + + if (na > 1) { + nsvg__xformSetTranslation(t, -args[1], -args[2]); + nsvg__xformMultiply(m, t); + } + + nsvg__xformSetRotation(t, args[0] / 180.0f * NSVG_PI); + nsvg__xformMultiply(m, t); + + if (na > 1) { + nsvg__xformSetTranslation(t, args[1], args[2]); + nsvg__xformMultiply(m, t); + } + + memcpy(xform, m, sizeof(float) * 6); + + return len; +} + +static void nsvg__parseTransform(float *xform, const char *str) +{ + float t[6]; + int len; + nsvg__xformIdentity(xform); + while (*str) { + if (strncmp(str, "matrix", 6) == 0) + len = nsvg__parseMatrix(t, str); + else if (strncmp(str, "translate", 9) == 0) + len = nsvg__parseTranslate(t, str); + else if (strncmp(str, "scale", 5) == 0) + len = nsvg__parseScale(t, str); + else if (strncmp(str, "rotate", 6) == 0) + len = nsvg__parseRotate(t, str); + else if (strncmp(str, "skewX", 5) == 0) + len = nsvg__parseSkewX(t, str); + else if (strncmp(str, "skewY", 5) == 0) + len = nsvg__parseSkewY(t, str); + else { + ++str; + continue; + } + if (len != 0) { + str += len; + } else { + ++str; + continue; + } + + nsvg__xformPremultiply(xform, t); + } +} + +static void nsvg__parseUrl(char *id, const char *str) +{ + int i = 0; + str += 4; // "url("; + if (*str == '#') + str++; + while (i < 63 && *str != ')') { + id[i] = *str++; + i++; + } + id[i] = '\0'; +} + +static char nsvg__parseLineCap(const char *str) +{ + if (strcmp(str, "butt") == 0) + return NSVG_CAP_BUTT; + else if (strcmp(str, "round") == 0) + return NSVG_CAP_ROUND; + else if (strcmp(str, "square") == 0) + return NSVG_CAP_SQUARE; + // TODO: handle inherit. + return NSVG_CAP_BUTT; +} + +static char nsvg__parseLineJoin(const char *str) +{ + if (strcmp(str, "miter") == 0) + return NSVG_JOIN_MITER; + else if (strcmp(str, "round") == 0) + return NSVG_JOIN_ROUND; + else if (strcmp(str, "bevel") == 0) + return NSVG_JOIN_BEVEL; + // TODO: handle inherit. + return NSVG_JOIN_MITER; +} + +static char nsvg__parseFillRule(const char *str) +{ + if (strcmp(str, "nonzero") == 0) + return NSVG_FILLRULE_NONZERO; + else if (strcmp(str, "evenodd") == 0) + return NSVG_FILLRULE_EVENODD; + // TODO: handle inherit. + return NSVG_FILLRULE_NONZERO; +} + +static const char *nsvg__getNextDashItem(const char *s, char *it) +{ + int n = 0; + it[0] = '\0'; + // Skip white spaces and commas + while (*s && (nsvg__isspace(*s) || *s == ',')) + s++; + // Advance until whitespace, comma or end. + while (*s && (!nsvg__isspace(*s) && *s != ',')) { + if (n < 63) + it[n++] = *s; + s++; + } + it[n++] = '\0'; + return s; +} + +static int nsvg__parseStrokeDashArray(NSVGparser *p, const char *str, float *strokeDashArray) +{ + char item[64]; + int count = 0, i; + float sum = 0.0f; + + // Handle "none" + if (str[0] == 'n') + return 0; + + // Parse dashes + while (*str) { + str = nsvg__getNextDashItem(str, item); + if (!*item) + break; + if (count < NSVG_MAX_DASHES) + strokeDashArray[count++] = + fabsf(nsvg__parseCoordinate(p, item, 0.0f, nsvg__actualLength(p))); + } + + for (i = 0; i < count; i++) + sum += strokeDashArray[i]; + if (sum <= 1e-6f) + count = 0; + + return count; +} + +static void nsvg__parseStyle(NSVGparser *p, const char *str); + +static int nsvg__parseAttr(NSVGparser *p, const char *name, const char *value) +{ + float xform[6]; + NSVGattrib *attr = nsvg__getAttr(p); + if (!attr) + return 0; + + if (strcmp(name, "style") == 0) { + nsvg__parseStyle(p, value); + } else if (strcmp(name, "display") == 0) { + if (strcmp(value, "none") == 0) + attr->visible = 0; + // Don't reset ->visible on display:inline, one display:none hides the whole subtree + + } else if (strcmp(name, "fill") == 0) { + if (strcmp(value, "none") == 0) { + attr->hasFill = 0; + } else if (strncmp(value, "url(", 4) == 0) { + attr->hasFill = 2; + nsvg__parseUrl(attr->fillGradient, value); + } else { + attr->hasFill = 1; + attr->fillColor = nsvg__parseColor(value); + } + } else if (strcmp(name, "opacity") == 0) { + attr->opacity = nsvg__parseOpacity(value); + } else if (strcmp(name, "fill-opacity") == 0) { + attr->fillOpacity = nsvg__parseOpacity(value); + } else if (strcmp(name, "stroke") == 0) { + if (strcmp(value, "none") == 0) { + attr->hasStroke = 0; + } else if (strncmp(value, "url(", 4) == 0) { + attr->hasStroke = 2; + nsvg__parseUrl(attr->strokeGradient, value); + } else { + attr->hasStroke = 1; + attr->strokeColor = nsvg__parseColor(value); + } + } else if (strcmp(name, "stroke-width") == 0) { + attr->strokeWidth = nsvg__parseCoordinate(p, value, 0.0f, nsvg__actualLength(p)); + } else if (strcmp(name, "stroke-dasharray") == 0) { + attr->strokeDashCount = nsvg__parseStrokeDashArray(p, value, attr->strokeDashArray); + } else if (strcmp(name, "stroke-dashoffset") == 0) { + attr->strokeDashOffset = + nsvg__parseCoordinate(p, value, 0.0f, nsvg__actualLength(p)); + } else if (strcmp(name, "stroke-opacity") == 0) { + attr->strokeOpacity = nsvg__parseOpacity(value); + } else if (strcmp(name, "stroke-linecap") == 0) { + attr->strokeLineCap = nsvg__parseLineCap(value); + } else if (strcmp(name, "stroke-linejoin") == 0) { + attr->strokeLineJoin = nsvg__parseLineJoin(value); + } else if (strcmp(name, "stroke-miterlimit") == 0) { + attr->miterLimit = nsvg__parseMiterLimit(value); + } else if (strcmp(name, "fill-rule") == 0) { + attr->fillRule = nsvg__parseFillRule(value); + } else if (strcmp(name, "font-size") == 0) { + attr->fontSize = nsvg__parseCoordinate(p, value, 0.0f, nsvg__actualLength(p)); + } else if (strcmp(name, "transform") == 0) { + nsvg__parseTransform(xform, value); + nsvg__xformPremultiply(attr->xform, xform); + } else if (strcmp(name, "stop-color") == 0) { + attr->stopColor = nsvg__parseColor(value); + } else if (strcmp(name, "stop-opacity") == 0) { + attr->stopOpacity = nsvg__parseOpacity(value); + } else if (strcmp(name, "offset") == 0) { + attr->stopOffset = nsvg__parseCoordinate(p, value, 0.0f, 1.0f); + } else if (strcmp(name, "id") == 0) { + strncpy(attr->id, value, 63); + attr->id[63] = '\0'; + } else { + return 0; + } + return 1; +} + +static int nsvg__parseNameValue(NSVGparser *p, const char *start, const char *end) +{ + const char *str; + const char *val; + char name[512]; + char value[512]; + int n; + + str = start; + while (str < end && *str != ':') + ++str; + + val = str; + + // Right Trim + while (str > start && (*str == ':' || nsvg__isspace(*str))) + --str; + ++str; + + n = (int)(str - start); + if (n > 511) + n = 511; + if (n) + memcpy(name, start, n); + name[n] = 0; + + while (val < end && (*val == ':' || nsvg__isspace(*val))) + ++val; + + n = (int)(end - val); + if (n > 511) + n = 511; + if (n) + memcpy(value, val, n); + value[n] = 0; + + return nsvg__parseAttr(p, name, value); +} + +static void nsvg__parseStyle(NSVGparser *p, const char *str) +{ + const char *start; + const char *end; + + while (*str) { + // Left Trim + while (*str && nsvg__isspace(*str)) + ++str; + start = str; + while (*str && *str != ';') + ++str; + end = str; + + // Right Trim + while (end > start && (*end == ';' || nsvg__isspace(*end))) + --end; + ++end; + + nsvg__parseNameValue(p, start, end); + if (*str) + ++str; + } +} + +static void nsvg__parseAttribs(NSVGparser *p, const char **attr) +{ + int i; + char *end; + for (i = 0; attr[i]; i += 2) { + if (strcmp(attr[i], "style") == 0) { + nsvg__parseStyle(p, attr[i + 1]); + } else if (strcmp(attr[i], "horiz-adv-x") == 0) { + p->image->defaultHorizAdv = strtol(attr[i + 1], &end, 10); + if (end == attr[i + 1]) + p->image->defaultHorizAdv = 0; + } else if (strcmp(attr[i], "ascent") == 0) { + p->image->fontAscent = strtol(attr[i + 1], &end, 10); + if (end == attr[i + 1]) + p->image->fontAscent = 0; + } else if (strcmp(attr[i], "descent") == 0) { + p->image->fontDescent = strtol(attr[i + 1], &end, 10); + if (end == attr[i + 1]) + p->image->fontDescent = 0; + } else { + nsvg__parseAttr(p, attr[i], attr[i + 1]); + } + } +} + +static int nsvg__getArgsPerElement(char cmd) +{ + switch (cmd) { + case 'v': + case 'V': + case 'h': + case 'H': + return 1; + case 'm': + case 'M': + case 'l': + case 'L': + case 't': + case 'T': + return 2; + case 'q': + case 'Q': + case 's': + case 'S': + return 4; + case 'c': + case 'C': + return 6; + case 'a': + case 'A': + return 7; + case 'z': + case 'Z': + return 0; + } + return -1; +} + +static void nsvg__pathMoveTo(NSVGparser *p, float *cpx, float *cpy, float *args, int rel) +{ + if (rel) { + *cpx += args[0]; + *cpy += args[1]; + } else { + *cpx = args[0]; + *cpy = args[1]; + } + nsvg__moveTo(p, *cpx, *cpy); +} + +static void nsvg__pathLineTo(NSVGparser *p, float *cpx, float *cpy, float *args, int rel) +{ + if (rel) { + *cpx += args[0]; + *cpy += args[1]; + } else { + *cpx = args[0]; + *cpy = args[1]; + } + nsvg__lineTo(p, *cpx, *cpy); +} + +static void nsvg__pathHLineTo(NSVGparser *p, float *cpx, float *cpy, float *args, int rel) +{ + if (rel) + *cpx += args[0]; + else + *cpx = args[0]; + nsvg__lineTo(p, *cpx, *cpy); +} + +static void nsvg__pathVLineTo(NSVGparser *p, float *cpx, float *cpy, float *args, int rel) +{ + if (rel) + *cpy += args[0]; + else + *cpy = args[0]; + nsvg__lineTo(p, *cpx, *cpy); +} + +static void nsvg__pathCubicBezTo(NSVGparser *p, float *cpx, float *cpy, float *cpx2, float *cpy2, + float *args, int rel) +{ + float x2, y2, cx1, cy1, cx2, cy2; + + if (rel) { + cx1 = *cpx + args[0]; + cy1 = *cpy + args[1]; + cx2 = *cpx + args[2]; + cy2 = *cpy + args[3]; + x2 = *cpx + args[4]; + y2 = *cpy + args[5]; + } else { + cx1 = args[0]; + cy1 = args[1]; + cx2 = args[2]; + cy2 = args[3]; + x2 = args[4]; + y2 = args[5]; + } + + nsvg__cubicBezTo(p, cx1, cy1, cx2, cy2, x2, y2); + + *cpx2 = cx2; + *cpy2 = cy2; + *cpx = x2; + *cpy = y2; +} + +static void nsvg__pathCubicBezShortTo(NSVGparser *p, float *cpx, float *cpy, float *cpx2, + float *cpy2, float *args, int rel) +{ + float x1, y1, x2, y2, cx1, cy1, cx2, cy2; + + x1 = *cpx; + y1 = *cpy; + if (rel) { + cx2 = *cpx + args[0]; + cy2 = *cpy + args[1]; + x2 = *cpx + args[2]; + y2 = *cpy + args[3]; + } else { + cx2 = args[0]; + cy2 = args[1]; + x2 = args[2]; + y2 = args[3]; + } + + cx1 = 2 * x1 - *cpx2; + cy1 = 2 * y1 - *cpy2; + + nsvg__cubicBezTo(p, cx1, cy1, cx2, cy2, x2, y2); + + *cpx2 = cx2; + *cpy2 = cy2; + *cpx = x2; + *cpy = y2; +} + +static void nsvg__pathQuadBezTo(NSVGparser *p, float *cpx, float *cpy, float *cpx2, float *cpy2, + float *args, int rel) +{ + float x1, y1, x2, y2, cx, cy; + float cx1, cy1, cx2, cy2; + + x1 = *cpx; + y1 = *cpy; + if (rel) { + cx = *cpx + args[0]; + cy = *cpy + args[1]; + x2 = *cpx + args[2]; + y2 = *cpy + args[3]; + } else { + cx = args[0]; + cy = args[1]; + x2 = args[2]; + y2 = args[3]; + } + + // Convert to cubic bezier + cx1 = x1 + 2.0f / 3.0f * (cx - x1); + cy1 = y1 + 2.0f / 3.0f * (cy - y1); + cx2 = x2 + 2.0f / 3.0f * (cx - x2); + cy2 = y2 + 2.0f / 3.0f * (cy - y2); + + nsvg__cubicBezTo(p, cx1, cy1, cx2, cy2, x2, y2); + + *cpx2 = cx; + *cpy2 = cy; + *cpx = x2; + *cpy = y2; +} + +static void nsvg__pathQuadBezShortTo(NSVGparser *p, float *cpx, float *cpy, float *cpx2, + float *cpy2, float *args, int rel) +{ + float x1, y1, x2, y2, cx, cy; + float cx1, cy1, cx2, cy2; + + x1 = *cpx; + y1 = *cpy; + if (rel) { + x2 = *cpx + args[0]; + y2 = *cpy + args[1]; + } else { + x2 = args[0]; + y2 = args[1]; + } + + cx = 2 * x1 - *cpx2; + cy = 2 * y1 - *cpy2; + + // Convert to cubix bezier + cx1 = x1 + 2.0f / 3.0f * (cx - x1); + cy1 = y1 + 2.0f / 3.0f * (cy - y1); + cx2 = x2 + 2.0f / 3.0f * (cx - x2); + cy2 = y2 + 2.0f / 3.0f * (cy - y2); + + nsvg__cubicBezTo(p, cx1, cy1, cx2, cy2, x2, y2); + + *cpx2 = cx; + *cpy2 = cy; + *cpx = x2; + *cpy = y2; +} + +static float nsvg__sqr(float x) +{ + return x * x; +} +static float nsvg__vmag(float x, float y) +{ + return sqrtf(x * x + y * y); +} + +static float nsvg__vecrat(float ux, float uy, float vx, float vy) +{ + return (ux * vx + uy * vy) / (nsvg__vmag(ux, uy) * nsvg__vmag(vx, vy)); +} + +static float nsvg__vecang(float ux, float uy, float vx, float vy) +{ + float r = nsvg__vecrat(ux, uy, vx, vy); + if (r < -1.0f) + r = -1.0f; + if (r > 1.0f) + r = 1.0f; + return ((ux * vy < uy * vx) ? -1.0f : 1.0f) * acosf(r); +} + +static void nsvg__pathArcTo(NSVGparser *p, float *cpx, float *cpy, float *args, int rel) +{ + // Ported from canvg (https://code.google.com/p/canvg/) + float rx, ry, rotx; + float x1, y1, x2, y2, cx, cy, dx, dy, d; + float x1p, y1p, cxp, cyp, s, sa, sb; + float ux, uy, vx, vy, a1, da; + float x, y, tanx, tany, a, px = 0, py = 0, ptanx = 0, ptany = 0, t[6]; + float sinrx, cosrx; + int fa, fs; + int i, ndivs; + float hda, kappa; + + rx = fabsf(args[0]); // y radius + ry = fabsf(args[1]); // x radius + rotx = args[2] / 180.0f * NSVG_PI; // x rotation angle + fa = fabsf(args[3]) > 1e-6 ? 1 : 0; // Large arc + fs = fabsf(args[4]) > 1e-6 ? 1 : 0; // Sweep direction + x1 = *cpx; // start point + y1 = *cpy; + if (rel) { // end point + x2 = *cpx + args[5]; + y2 = *cpy + args[6]; + } else { + x2 = args[5]; + y2 = args[6]; + } + + dx = x1 - x2; + dy = y1 - y2; + d = sqrtf(dx * dx + dy * dy); + if (d < 1e-6f || rx < 1e-6f || ry < 1e-6f) { + // The arc degenerates to a line + nsvg__lineTo(p, x2, y2); + *cpx = x2; + *cpy = y2; + return; + } + + sinrx = sinf(rotx); + cosrx = cosf(rotx); + + // Convert to center point parameterization. + // http://www.w3.org/TR/SVG11/implnote.html#ArcImplementationNotes + // 1) Compute x1', y1' + x1p = cosrx * dx / 2.0f + sinrx * dy / 2.0f; + y1p = -sinrx * dx / 2.0f + cosrx * dy / 2.0f; + d = nsvg__sqr(x1p) / nsvg__sqr(rx) + nsvg__sqr(y1p) / nsvg__sqr(ry); + if (d > 1) { + d = sqrtf(d); + rx *= d; + ry *= d; + } + // 2) Compute cx', cy' + s = 0.0f; + sa = nsvg__sqr(rx) * nsvg__sqr(ry) - nsvg__sqr(rx) * nsvg__sqr(y1p) - + nsvg__sqr(ry) * nsvg__sqr(x1p); + sb = nsvg__sqr(rx) * nsvg__sqr(y1p) + nsvg__sqr(ry) * nsvg__sqr(x1p); + if (sa < 0.0f) + sa = 0.0f; + if (sb > 0.0f) + s = sqrtf(sa / sb); + if (fa == fs) + s = -s; + cxp = s * rx * y1p / ry; + cyp = s * -ry * x1p / rx; + + // 3) Compute cx,cy from cx',cy' + cx = (x1 + x2) / 2.0f + cosrx * cxp - sinrx * cyp; + cy = (y1 + y2) / 2.0f + sinrx * cxp + cosrx * cyp; + + // 4) Calculate theta1, and delta theta. + ux = (x1p - cxp) / rx; + uy = (y1p - cyp) / ry; + vx = (-x1p - cxp) / rx; + vy = (-y1p - cyp) / ry; + a1 = nsvg__vecang(1.0f, 0.0f, ux, uy); // Initial angle + da = nsvg__vecang(ux, uy, vx, vy); // Delta angle + + // if (vecrat(ux,uy,vx,vy) <= -1.0f) da = NSVG_PI; + // if (vecrat(ux,uy,vx,vy) >= 1.0f) da = 0; + + if (fs == 0 && da > 0) + da -= 2 * NSVG_PI; + else if (fs == 1 && da < 0) + da += 2 * NSVG_PI; + + // Approximate the arc using cubic spline segments. + t[0] = cosrx; + t[1] = sinrx; + t[2] = -sinrx; + t[3] = cosrx; + t[4] = cx; + t[5] = cy; + + // Split arc into max 90 degree segments. + // The loop assumes an iteration per end point (including start and end), this +1. + ndivs = (int)(fabsf(da) / (NSVG_PI * 0.5f) + 1.0f); + hda = (da / (float)ndivs) / 2.0f; + // Fix for ticket #179: division by 0: avoid cotangens around 0 (infinite) + if ((hda < 1e-3f) && (hda > -1e-3f)) + hda *= 0.5f; + else + hda = (1.0f - cosf(hda)) / sinf(hda); + kappa = fabsf(4.0f / 3.0f * hda); + if (da < 0.0f) + kappa = -kappa; + + for (i = 0; i <= ndivs; i++) { + a = a1 + da * ((float)i / (float)ndivs); + dx = cosf(a); + dy = sinf(a); + nsvg__xformPoint(&x, &y, dx * rx, dy * ry, t); // position + nsvg__xformVec(&tanx, &tany, -dy * rx * kappa, dx * ry * kappa, t); // tangent + if (i > 0) + nsvg__cubicBezTo(p, px + ptanx, py + ptany, x - tanx, y - tany, x, y); + px = x; + py = y; + ptanx = tanx; + ptany = tany; + } + + *cpx = x2; + *cpy = y2; +} + +static void nsvg__parsePath(NSVGparser *p, const char **attr) +{ + const char *s = NULL; + char cmd = '\0'; + float args[10]; + int nargs; + int rargs = 0; + char initPoint; + float cpx, cpy, cpx2, cpy2; + const char *tmp[4]; + char closedFlag; + int i; + char item[64]; + + for (i = 0; attr[i]; i += 2) { + if (strcmp(attr[i], "d") == 0) { + s = attr[i + 1]; + } else if (strcmp(attr[i], "unicode") == 0 && + strlen(attr[i + 1]) < NSVG_MAX_UNICODE_LEN) { + strcpy(p->unicodeFlag, attr[i + 1]); + } else if (strcmp(attr[i], "horiz-adv-x") == 0) { + p->horizAdvFlag = attr[i + 1]; + } else { + tmp[0] = attr[i]; + tmp[1] = attr[i + 1]; + tmp[2] = 0; + tmp[3] = 0; + nsvg__parseAttribs(p, tmp); + } + } + + if (s) { + nsvg__resetPath(p); + cpx = 0; + cpy = 0; + cpx2 = 0; + cpy2 = 0; + initPoint = 0; + closedFlag = 0; + nargs = 0; + + while (*s) { + s = nsvg__getNextPathItem(s, item); + if (!*item) + break; + if (cmd != '\0' && nsvg__isCoordinate(item)) { + if (nargs < 10) + args[nargs++] = (float)nsvg__atof(item); + if (nargs >= rargs) { + switch (cmd) { + case 'm': + case 'M': + nsvg__pathMoveTo(p, &cpx, &cpy, args, + cmd == 'm' ? 1 : 0); + // Moveto can be followed by multiple coordinate + // pairs, which should be treated as linetos. + cmd = (cmd == 'm') ? 'l' : 'L'; + rargs = nsvg__getArgsPerElement(cmd); + cpx2 = cpx; + cpy2 = cpy; + initPoint = 1; + break; + case 'l': + case 'L': + nsvg__pathLineTo(p, &cpx, &cpy, args, + cmd == 'l' ? 1 : 0); + cpx2 = cpx; + cpy2 = cpy; + break; + case 'H': + case 'h': + nsvg__pathHLineTo(p, &cpx, &cpy, args, + cmd == 'h' ? 1 : 0); + cpx2 = cpx; + cpy2 = cpy; + break; + case 'V': + case 'v': + nsvg__pathVLineTo(p, &cpx, &cpy, args, + cmd == 'v' ? 1 : 0); + cpx2 = cpx; + cpy2 = cpy; + break; + case 'C': + case 'c': + nsvg__pathCubicBezTo(p, &cpx, &cpy, &cpx2, &cpy2, + args, cmd == 'c' ? 1 : 0); + break; + case 'S': + case 's': + nsvg__pathCubicBezShortTo(p, &cpx, &cpy, &cpx2, + &cpy2, args, + cmd == 's' ? 1 : 0); + break; + case 'Q': + case 'q': + nsvg__pathQuadBezTo(p, &cpx, &cpy, &cpx2, &cpy2, + args, cmd == 'q' ? 1 : 0); + break; + case 'T': + case 't': + nsvg__pathQuadBezShortTo(p, &cpx, &cpy, &cpx2, + &cpy2, args, + cmd == 't' ? 1 : 0); + break; + case 'A': + case 'a': + nsvg__pathArcTo(p, &cpx, &cpy, args, + cmd == 'a' ? 1 : 0); + cpx2 = cpx; + cpy2 = cpy; + break; + default: + if (nargs >= 2) { + cpx = args[nargs - 2]; + cpy = args[nargs - 1]; + cpx2 = cpx; + cpy2 = cpy; + } + break; + } + nargs = 0; + } + } else { + cmd = item[0]; + if (cmd == 'M' || cmd == 'm') { + // Commit path. + if (p->npts > 0) + nsvg__addPath(p, closedFlag); + // Start new subpath. + nsvg__resetPath(p); + closedFlag = 0; + nargs = 0; + } else if (initPoint == 0) { + // Do not allow other commands until initial point has been + // set (moveTo called once). + cmd = '\0'; + } + if (cmd == 'Z' || cmd == 'z') { + closedFlag = 1; + // Commit path. + if (p->npts > 0) { + // Move current point to first point + cpx = p->pts[0]; + cpy = p->pts[1]; + cpx2 = cpx; + cpy2 = cpy; + nsvg__addPath(p, closedFlag); + } + // Start new subpath. + nsvg__resetPath(p); + nsvg__moveTo(p, cpx, cpy); + closedFlag = 0; + nargs = 0; + } + rargs = nsvg__getArgsPerElement(cmd); + if (rargs == -1) { + // Command not recognized + cmd = '\0'; + rargs = 0; + } + } + } + // Commit path. + if (p->npts) + nsvg__addPath(p, closedFlag); + } + + nsvg__addShape(p); +} + +static void nsvg__parseRect(NSVGparser *p, const char **attr) +{ + float x = 0.0f; + float y = 0.0f; + float w = 0.0f; + float h = 0.0f; + float rx = -1.0f; // marks not set + float ry = -1.0f; + int i; + + for (i = 0; attr[i]; i += 2) { + if (!nsvg__parseAttr(p, attr[i], attr[i + 1])) { + if (strcmp(attr[i], "x") == 0) + x = nsvg__parseCoordinate(p, attr[i + 1], nsvg__actualOrigX(p), + nsvg__actualWidth(p)); + if (strcmp(attr[i], "y") == 0) + y = nsvg__parseCoordinate(p, attr[i + 1], nsvg__actualOrigY(p), + nsvg__actualHeight(p)); + if (strcmp(attr[i], "width") == 0) + w = nsvg__parseCoordinate(p, attr[i + 1], 0.0f, + nsvg__actualWidth(p)); + if (strcmp(attr[i], "height") == 0) + h = nsvg__parseCoordinate(p, attr[i + 1], 0.0f, + nsvg__actualHeight(p)); + if (strcmp(attr[i], "rx") == 0) + rx = fabsf(nsvg__parseCoordinate(p, attr[i + 1], 0.0f, + nsvg__actualWidth(p))); + if (strcmp(attr[i], "ry") == 0) + ry = fabsf(nsvg__parseCoordinate(p, attr[i + 1], 0.0f, + nsvg__actualHeight(p))); + } + } + + if (rx < 0.0f && ry > 0.0f) + rx = ry; + if (ry < 0.0f && rx > 0.0f) + ry = rx; + if (rx < 0.0f) + rx = 0.0f; + if (ry < 0.0f) + ry = 0.0f; + if (rx > w / 2.0f) + rx = w / 2.0f; + if (ry > h / 2.0f) + ry = h / 2.0f; + + if (w != 0.0f && h != 0.0f) { + nsvg__resetPath(p); + + if (rx < 0.00001f || ry < 0.0001f) { + nsvg__moveTo(p, x, y); + nsvg__lineTo(p, x + w, y); + nsvg__lineTo(p, x + w, y + h); + nsvg__lineTo(p, x, y + h); + } else { + // Rounded rectangle + nsvg__moveTo(p, x + rx, y); + nsvg__lineTo(p, x + w - rx, y); + nsvg__cubicBezTo(p, x + w - rx * (1 - NSVG_KAPPA90), y, x + w, + y + ry * (1 - NSVG_KAPPA90), x + w, y + ry); + nsvg__lineTo(p, x + w, y + h - ry); + nsvg__cubicBezTo(p, x + w, y + h - ry * (1 - NSVG_KAPPA90), + x + w - rx * (1 - NSVG_KAPPA90), y + h, x + w - rx, y + h); + nsvg__lineTo(p, x + rx, y + h); + nsvg__cubicBezTo(p, x + rx * (1 - NSVG_KAPPA90), y + h, x, + y + h - ry * (1 - NSVG_KAPPA90), x, y + h - ry); + nsvg__lineTo(p, x, y + ry); + nsvg__cubicBezTo(p, x, y + ry * (1 - NSVG_KAPPA90), + x + rx * (1 - NSVG_KAPPA90), y, x + rx, y); + } + + nsvg__addPath(p, 1); + + nsvg__addShape(p); + } +} + +static void nsvg__parseCircle(NSVGparser *p, const char **attr) +{ + float cx = 0.0f; + float cy = 0.0f; + float r = 0.0f; + int i; + + for (i = 0; attr[i]; i += 2) { + if (!nsvg__parseAttr(p, attr[i], attr[i + 1])) { + if (strcmp(attr[i], "cx") == 0) + cx = nsvg__parseCoordinate(p, attr[i + 1], nsvg__actualOrigX(p), + nsvg__actualWidth(p)); + if (strcmp(attr[i], "cy") == 0) + cy = nsvg__parseCoordinate(p, attr[i + 1], nsvg__actualOrigY(p), + nsvg__actualHeight(p)); + if (strcmp(attr[i], "r") == 0) + r = fabsf(nsvg__parseCoordinate(p, attr[i + 1], 0.0f, + nsvg__actualLength(p))); + } + } + + if (r > 0.0f) { + nsvg__resetPath(p); + + nsvg__moveTo(p, cx + r, cy); + nsvg__cubicBezTo(p, cx + r, cy + r * NSVG_KAPPA90, cx + r * NSVG_KAPPA90, cy + r, + cx, cy + r); + nsvg__cubicBezTo(p, cx - r * NSVG_KAPPA90, cy + r, cx - r, cy + r * NSVG_KAPPA90, + cx - r, cy); + nsvg__cubicBezTo(p, cx - r, cy - r * NSVG_KAPPA90, cx - r * NSVG_KAPPA90, cy - r, + cx, cy - r); + nsvg__cubicBezTo(p, cx + r * NSVG_KAPPA90, cy - r, cx + r, cy - r * NSVG_KAPPA90, + cx + r, cy); + + nsvg__addPath(p, 1); + + nsvg__addShape(p); + } +} + +static void nsvg__parseEllipse(NSVGparser *p, const char **attr) +{ + float cx = 0.0f; + float cy = 0.0f; + float rx = 0.0f; + float ry = 0.0f; + int i; + + for (i = 0; attr[i]; i += 2) { + if (!nsvg__parseAttr(p, attr[i], attr[i + 1])) { + if (strcmp(attr[i], "cx") == 0) + cx = nsvg__parseCoordinate(p, attr[i + 1], nsvg__actualOrigX(p), + nsvg__actualWidth(p)); + if (strcmp(attr[i], "cy") == 0) + cy = nsvg__parseCoordinate(p, attr[i + 1], nsvg__actualOrigY(p), + nsvg__actualHeight(p)); + if (strcmp(attr[i], "rx") == 0) + rx = fabsf(nsvg__parseCoordinate(p, attr[i + 1], 0.0f, + nsvg__actualWidth(p))); + if (strcmp(attr[i], "ry") == 0) + ry = fabsf(nsvg__parseCoordinate(p, attr[i + 1], 0.0f, + nsvg__actualHeight(p))); + } + } + + if (rx > 0.0f && ry > 0.0f) { + + nsvg__resetPath(p); + + nsvg__moveTo(p, cx + rx, cy); + nsvg__cubicBezTo(p, cx + rx, cy + ry * NSVG_KAPPA90, cx + rx * NSVG_KAPPA90, + cy + ry, cx, cy + ry); + nsvg__cubicBezTo(p, cx - rx * NSVG_KAPPA90, cy + ry, cx - rx, + cy + ry * NSVG_KAPPA90, cx - rx, cy); + nsvg__cubicBezTo(p, cx - rx, cy - ry * NSVG_KAPPA90, cx - rx * NSVG_KAPPA90, + cy - ry, cx, cy - ry); + nsvg__cubicBezTo(p, cx + rx * NSVG_KAPPA90, cy - ry, cx + rx, + cy - ry * NSVG_KAPPA90, cx + rx, cy); + + nsvg__addPath(p, 1); + + nsvg__addShape(p); + } +} + +static void nsvg__parseLine(NSVGparser *p, const char **attr) +{ + float x1 = 0.0; + float y1 = 0.0; + float x2 = 0.0; + float y2 = 0.0; + int i; + + for (i = 0; attr[i]; i += 2) { + if (!nsvg__parseAttr(p, attr[i], attr[i + 1])) { + if (strcmp(attr[i], "x1") == 0) + x1 = nsvg__parseCoordinate(p, attr[i + 1], nsvg__actualOrigX(p), + nsvg__actualWidth(p)); + if (strcmp(attr[i], "y1") == 0) + y1 = nsvg__parseCoordinate(p, attr[i + 1], nsvg__actualOrigY(p), + nsvg__actualHeight(p)); + if (strcmp(attr[i], "x2") == 0) + x2 = nsvg__parseCoordinate(p, attr[i + 1], nsvg__actualOrigX(p), + nsvg__actualWidth(p)); + if (strcmp(attr[i], "y2") == 0) + y2 = nsvg__parseCoordinate(p, attr[i + 1], nsvg__actualOrigY(p), + nsvg__actualHeight(p)); + } + } + + nsvg__resetPath(p); + + nsvg__moveTo(p, x1, y1); + nsvg__lineTo(p, x2, y2); + + nsvg__addPath(p, 0); + + nsvg__addShape(p); +} + +static void nsvg__parsePoly(NSVGparser *p, const char **attr, int closeFlag) +{ + int i; + const char *s; + float args[2]; + int nargs, npts = 0; + char item[64]; + + nsvg__resetPath(p); + + for (i = 0; attr[i]; i += 2) { + if (!nsvg__parseAttr(p, attr[i], attr[i + 1])) { + if (strcmp(attr[i], "points") == 0) { + s = attr[i + 1]; + nargs = 0; + while (*s) { + s = nsvg__getNextPathItem(s, item); + args[nargs++] = (float)nsvg__atof(item); + if (nargs >= 2) { + if (npts == 0) + nsvg__moveTo(p, args[0], args[1]); + else + nsvg__lineTo(p, args[0], args[1]); + nargs = 0; + npts++; + } + } + } + } + } + + nsvg__addPath(p, (char)closeFlag); + + nsvg__addShape(p); +} + +static void nsvg__parseSVG(NSVGparser *p, const char **attr) +{ + int i; + for (i = 0; attr[i]; i += 2) { + if (!nsvg__parseAttr(p, attr[i], attr[i + 1])) { + if (strcmp(attr[i], "width") == 0) { + p->image->width = nsvg__parseCoordinate(p, attr[i + 1], 0.0f, 0.0f); + } else if (strcmp(attr[i], "height") == 0) { + p->image->height = + nsvg__parseCoordinate(p, attr[i + 1], 0.0f, 0.0f); + } else if (strcmp(attr[i], "viewBox") == 0) { + const char *s = attr[i + 1]; + char buf[64]; + s = nsvg__parseNumber(s, buf, 64); + p->viewMinx = nsvg__atof(buf); + while (*s && (nsvg__isspace(*s) || *s == '%' || *s == ',')) + s++; + if (!*s) + return; + s = nsvg__parseNumber(s, buf, 64); + p->viewMiny = nsvg__atof(buf); + while (*s && (nsvg__isspace(*s) || *s == '%' || *s == ',')) + s++; + if (!*s) + return; + s = nsvg__parseNumber(s, buf, 64); + p->viewWidth = nsvg__atof(buf); + while (*s && (nsvg__isspace(*s) || *s == '%' || *s == ',')) + s++; + if (!*s) + return; + s = nsvg__parseNumber(s, buf, 64); + p->viewHeight = nsvg__atof(buf); + } else if (strcmp(attr[i], "preserveAspectRatio") == 0) { + if (strstr(attr[i + 1], "none") != 0) { + // No uniform scaling + p->alignType = NSVG_ALIGN_NONE; + } else { + // Parse X align + if (strstr(attr[i + 1], "xMin") != 0) + p->alignX = NSVG_ALIGN_MIN; + else if (strstr(attr[i + 1], "xMid") != 0) + p->alignX = NSVG_ALIGN_MID; + else if (strstr(attr[i + 1], "xMax") != 0) + p->alignX = NSVG_ALIGN_MAX; + // Parse X align + if (strstr(attr[i + 1], "yMin") != 0) + p->alignY = NSVG_ALIGN_MIN; + else if (strstr(attr[i + 1], "yMid") != 0) + p->alignY = NSVG_ALIGN_MID; + else if (strstr(attr[i + 1], "yMax") != 0) + p->alignY = NSVG_ALIGN_MAX; + // Parse meet/slice + p->alignType = NSVG_ALIGN_MEET; + if (strstr(attr[i + 1], "slice") != 0) + p->alignType = NSVG_ALIGN_SLICE; + } + } + } + } +} + +static void nsvg__parseGradient(NSVGparser *p, const char **attr, char type) +{ + int i; + NSVGgradientData *grad = (NSVGgradientData *)malloc(sizeof(NSVGgradientData)); + if (grad == NULL) + return; + memset(grad, 0, sizeof(NSVGgradientData)); + grad->units = NSVG_OBJECT_SPACE; + grad->type = type; + if (grad->type == NSVG_PAINT_LINEAR_GRADIENT) { + grad->linear.x1 = nsvg__coord(0.0f, NSVG_UNITS_PERCENT); + grad->linear.y1 = nsvg__coord(0.0f, NSVG_UNITS_PERCENT); + grad->linear.x2 = nsvg__coord(100.0f, NSVG_UNITS_PERCENT); + grad->linear.y2 = nsvg__coord(0.0f, NSVG_UNITS_PERCENT); + } else if (grad->type == NSVG_PAINT_RADIAL_GRADIENT) { + grad->radial.cx = nsvg__coord(50.0f, NSVG_UNITS_PERCENT); + grad->radial.cy = nsvg__coord(50.0f, NSVG_UNITS_PERCENT); + grad->radial.r = nsvg__coord(50.0f, NSVG_UNITS_PERCENT); + } + + nsvg__xformIdentity(grad->xform); + + for (i = 0; attr[i]; i += 2) { + if (strcmp(attr[i], "id") == 0) { + strncpy(grad->id, attr[i + 1], 63); + grad->id[63] = '\0'; + } else if (!nsvg__parseAttr(p, attr[i], attr[i + 1])) { + if (strcmp(attr[i], "gradientUnits") == 0) { + if (strcmp(attr[i + 1], "objectBoundingBox") == 0) + grad->units = NSVG_OBJECT_SPACE; + else + grad->units = NSVG_USER_SPACE; + } else if (strcmp(attr[i], "gradientTransform") == 0) { + nsvg__parseTransform(grad->xform, attr[i + 1]); + } else if (strcmp(attr[i], "cx") == 0) { + grad->radial.cx = nsvg__parseCoordinateRaw(attr[i + 1]); + } else if (strcmp(attr[i], "cy") == 0) { + grad->radial.cy = nsvg__parseCoordinateRaw(attr[i + 1]); + } else if (strcmp(attr[i], "r") == 0) { + grad->radial.r = nsvg__parseCoordinateRaw(attr[i + 1]); + } else if (strcmp(attr[i], "fx") == 0) { + grad->radial.fx = nsvg__parseCoordinateRaw(attr[i + 1]); + } else if (strcmp(attr[i], "fy") == 0) { + grad->radial.fy = nsvg__parseCoordinateRaw(attr[i + 1]); + } else if (strcmp(attr[i], "x1") == 0) { + grad->linear.x1 = nsvg__parseCoordinateRaw(attr[i + 1]); + } else if (strcmp(attr[i], "y1") == 0) { + grad->linear.y1 = nsvg__parseCoordinateRaw(attr[i + 1]); + } else if (strcmp(attr[i], "x2") == 0) { + grad->linear.x2 = nsvg__parseCoordinateRaw(attr[i + 1]); + } else if (strcmp(attr[i], "y2") == 0) { + grad->linear.y2 = nsvg__parseCoordinateRaw(attr[i + 1]); + } else if (strcmp(attr[i], "spreadMethod") == 0) { + if (strcmp(attr[i + 1], "pad") == 0) + grad->spread = NSVG_SPREAD_PAD; + else if (strcmp(attr[i + 1], "reflect") == 0) + grad->spread = NSVG_SPREAD_REFLECT; + else if (strcmp(attr[i + 1], "repeat") == 0) + grad->spread = NSVG_SPREAD_REPEAT; + } else if (strcmp(attr[i], "xlink:href") == 0) { + const char *href = attr[i + 1]; + strncpy(grad->ref, href + 1, 62); + grad->ref[62] = '\0'; + } + } + } + + grad->next = p->gradients; + p->gradients = grad; +} + +static void nsvg__parseGradientStop(NSVGparser *p, const char **attr) +{ + NSVGattrib *curAttr = nsvg__getAttr(p); + NSVGgradientData *grad; + NSVGgradientStop *stop; + int i, idx; + + curAttr->stopOffset = 0; + curAttr->stopColor = 0; + curAttr->stopOpacity = 1.0f; + + for (i = 0; attr[i]; i += 2) { + nsvg__parseAttr(p, attr[i], attr[i + 1]); + } + + // Add stop to the last gradient. + grad = p->gradients; + if (grad == NULL) + return; + + grad->nstops++; + grad->stops = + (NSVGgradientStop *)realloc(grad->stops, sizeof(NSVGgradientStop) * grad->nstops); + if (grad->stops == NULL) + return; + + // Insert + idx = grad->nstops - 1; + for (i = 0; i < grad->nstops - 1; i++) { + if (curAttr->stopOffset < grad->stops[i].offset) { + idx = i; + break; + } + } + if (idx != grad->nstops - 1) { + for (i = grad->nstops - 1; i > idx; i--) + grad->stops[i] = grad->stops[i - 1]; + } + + stop = &grad->stops[idx]; + stop->color = curAttr->stopColor; + stop->color |= (unsigned int)(curAttr->stopOpacity * 255) << 24; + stop->offset = curAttr->stopOffset; +} + +static void nsvg__startElement(void *ud, const char *el, const char **attr) +{ + NSVGparser *p = (NSVGparser *)ud; + + if (p->defsFlag) { + // Skip everything but gradients and fonts in defs + if (strcmp(el, "linearGradient") == 0) { + nsvg__parseGradient(p, attr, NSVG_PAINT_LINEAR_GRADIENT); + } else if (strcmp(el, "radialGradient") == 0) { + nsvg__parseGradient(p, attr, NSVG_PAINT_RADIAL_GRADIENT); + } else if (strcmp(el, "stop") == 0) { + nsvg__parseGradientStop(p, attr); + } else if (strcmp(el, "glyph") == 0) { // glyphs are just special paths + if (p->pathFlag) // Do not allow nested paths. + return; + nsvg__pushAttr(p); + nsvg__parsePath(p, attr); + nsvg__popAttr(p); + } else if (strcmp(el, "font") == 0) { // fonts are special "g" tags + nsvg__pushAttr(p); + nsvg__parseAttribs(p, attr); + } else if (strcmp(el, "font-face") == 0) { // for the default character width + nsvg__pushAttr(p); + nsvg__parseAttribs(p, attr); + } + return; + } + + if (strcmp(el, "g") == 0) { + nsvg__pushAttr(p); + nsvg__parseAttribs(p, attr); + } else if (strcmp(el, "path") == 0) { + if (p->pathFlag) // Do not allow nested paths. + return; + nsvg__pushAttr(p); + nsvg__parsePath(p, attr); + nsvg__popAttr(p); + } else if (strcmp(el, "rect") == 0) { + nsvg__pushAttr(p); + nsvg__parseRect(p, attr); + nsvg__popAttr(p); + } else if (strcmp(el, "circle") == 0) { + nsvg__pushAttr(p); + nsvg__parseCircle(p, attr); + nsvg__popAttr(p); + } else if (strcmp(el, "ellipse") == 0) { + nsvg__pushAttr(p); + nsvg__parseEllipse(p, attr); + nsvg__popAttr(p); + } else if (strcmp(el, "line") == 0) { + nsvg__pushAttr(p); + nsvg__parseLine(p, attr); + nsvg__popAttr(p); + } else if (strcmp(el, "polyline") == 0) { + nsvg__pushAttr(p); + nsvg__parsePoly(p, attr, 0); + nsvg__popAttr(p); + } else if (strcmp(el, "polygon") == 0) { + nsvg__pushAttr(p); + nsvg__parsePoly(p, attr, 1); + nsvg__popAttr(p); + } else if (strcmp(el, "linearGradient") == 0) { + nsvg__parseGradient(p, attr, NSVG_PAINT_LINEAR_GRADIENT); + } else if (strcmp(el, "radialGradient") == 0) { + nsvg__parseGradient(p, attr, NSVG_PAINT_RADIAL_GRADIENT); + } else if (strcmp(el, "stop") == 0) { + nsvg__parseGradientStop(p, attr); + } else if (strcmp(el, "defs") == 0) { + p->defsFlag = 1; + } else if (strcmp(el, "svg") == 0) { + nsvg__parseSVG(p, attr); + } +} + +static void nsvg__endElement(void *ud, const char *el) +{ + NSVGparser *p = (NSVGparser *)ud; + + if (strcmp(el, "g") == 0) { + nsvg__popAttr(p); + } else if (strcmp(el, "path") == 0) { + p->pathFlag = 0; + } else if (strcmp(el, "defs") == 0) { + p->defsFlag = 0; + } +} + +static void nsvg__content(void *ud, const char *s) +{ + NSVG_NOTUSED(ud); + NSVG_NOTUSED(s); + // empty +} + +static void nsvg__imageBounds(NSVGparser *p, float *bounds) +{ + NSVGshape *shape; + shape = p->image->shapes; + if (shape == NULL) { + bounds[0] = bounds[1] = bounds[2] = bounds[3] = 0.0; + return; + } + bounds[0] = shape->bounds[0]; + bounds[1] = shape->bounds[1]; + bounds[2] = shape->bounds[2]; + bounds[3] = shape->bounds[3]; + for (shape = shape->next; shape != NULL; shape = shape->next) { + bounds[0] = nsvg__minf(bounds[0], shape->bounds[0]); + bounds[1] = nsvg__minf(bounds[1], shape->bounds[1]); + bounds[2] = nsvg__maxf(bounds[2], shape->bounds[2]); + bounds[3] = nsvg__maxf(bounds[3], shape->bounds[3]); + } +} + +static float nsvg__viewAlign(float content, float container, int type) +{ + if (type == NSVG_ALIGN_MIN) + return 0; + else if (type == NSVG_ALIGN_MAX) + return container - content; + // mid + return (container - content) * 0.5f; +} + +static void nsvg__scaleGradient(NSVGgradient *grad, float tx, float ty, float sx, float sy) +{ + float t[6]; + nsvg__xformSetTranslation(t, tx, ty); + nsvg__xformMultiply(grad->xform, t); + + nsvg__xformSetScale(t, sx, sy); + nsvg__xformMultiply(grad->xform, t); +} + +static void nsvg__scaleToViewbox(NSVGparser *p, const char *units) +{ + NSVGshape *shape; + NSVGpath *path; + float tx, ty, sx, sy, us, bounds[4], t[6], avgs; + int i; + float *pt; + + // Guess image size if not set completely. + nsvg__imageBounds(p, bounds); + + if (p->viewWidth == 0) { + if (p->image->width > 0) { + p->viewWidth = p->image->width; + } else { + p->viewMinx = bounds[0]; + p->viewWidth = bounds[2] - bounds[0]; + } + } + if (p->viewHeight == 0) { + if (p->image->height > 0) { + p->viewHeight = p->image->height; + } else { + p->viewMiny = bounds[1]; + p->viewHeight = bounds[3] - bounds[1]; + } + } + if (p->image->width == 0) + p->image->width = p->viewWidth; + if (p->image->height == 0) + p->image->height = p->viewHeight; + + tx = -p->viewMinx; + ty = -p->viewMiny; + sx = p->viewWidth > 0 ? p->image->width / p->viewWidth : 0; + sy = p->viewHeight > 0 ? p->image->height / p->viewHeight : 0; + // Unit scaling + us = 1.0f / + nsvg__convertToPixels(p, nsvg__coord(1.0f, nsvg__parseUnits(units)), 0.0f, 1.0f); + + // Fix aspect ratio + if (p->alignType == NSVG_ALIGN_MEET) { + // fit whole image into viewbox + sx = sy = nsvg__minf(sx, sy); + tx += nsvg__viewAlign(p->viewWidth * sx, p->image->width, p->alignX) / sx; + ty += nsvg__viewAlign(p->viewHeight * sy, p->image->height, p->alignY) / sy; + } else if (p->alignType == NSVG_ALIGN_SLICE) { + // fill whole viewbox with image + sx = sy = nsvg__maxf(sx, sy); + tx += nsvg__viewAlign(p->viewWidth * sx, p->image->width, p->alignX) / sx; + ty += nsvg__viewAlign(p->viewHeight * sy, p->image->height, p->alignY) / sy; + } + + // Transform + sx *= us; + sy *= us; + avgs = (sx + sy) / 2.0f; + for (shape = p->image->shapes; shape != NULL; shape = shape->next) { + shape->bounds[0] = (shape->bounds[0] + tx) * sx; + shape->bounds[1] = (shape->bounds[1] + ty) * sy; + shape->bounds[2] = (shape->bounds[2] + tx) * sx; + shape->bounds[3] = (shape->bounds[3] + ty) * sy; + for (path = shape->paths; path != NULL; path = path->next) { + path->bounds[0] = (path->bounds[0] + tx) * sx; + path->bounds[1] = (path->bounds[1] + ty) * sy; + path->bounds[2] = (path->bounds[2] + tx) * sx; + path->bounds[3] = (path->bounds[3] + ty) * sy; + for (i = 0; i < path->npts; i++) { + pt = &path->pts[i * 2]; + pt[0] = (pt[0] + tx) * sx; + pt[1] = (pt[1] + ty) * sy; + } + } + + if (shape->fill.type == NSVG_PAINT_LINEAR_GRADIENT || + shape->fill.type == NSVG_PAINT_RADIAL_GRADIENT) { + nsvg__scaleGradient(shape->fill.gradient, tx, ty, sx, sy); + memcpy(t, shape->fill.gradient->xform, sizeof(float) * 6); + nsvg__xformInverse(shape->fill.gradient->xform, t); + } + if (shape->stroke.type == NSVG_PAINT_LINEAR_GRADIENT || + shape->stroke.type == NSVG_PAINT_RADIAL_GRADIENT) { + nsvg__scaleGradient(shape->stroke.gradient, tx, ty, sx, sy); + memcpy(t, shape->stroke.gradient->xform, sizeof(float) * 6); + nsvg__xformInverse(shape->stroke.gradient->xform, t); + } + + shape->strokeWidth *= avgs; + shape->strokeDashOffset *= avgs; + for (i = 0; i < shape->strokeDashCount; i++) + shape->strokeDashArray[i] *= avgs; + } +} + +NSVGshape **nsvgGetTextShapes(const NSVGimage *image, const char *text, int textLen) +{ + NSVGshape *shape = NULL; + NSVGshape **ret = calloc(textLen, sizeof(shape)); // array of paths, text to render + int i; + + // make list of paths representing glyphs to render + for (i = 0; i < textLen; i++) { + if (text[i] == ' ' || text[i] == '\n') { + ret[i] = NULL; + continue; + } + for (shape = image->shapes; shape != NULL; shape = shape->next) { + if (!(shape->flags & NSVG_FLAGS_VISIBLE)) + continue; + if (shape->unicode[0] == text[i]) { + ret[i] = shape; + goto found; + } + } + found: + continue; + } + + return ret; +} + +NSVGimage *nsvgParse(char *input, const char *units, float dpi) +{ + NSVGparser *p; + NSVGimage *ret = 0; + + p = nsvg__createParser(); + if (p == NULL) { + return NULL; + } + p->dpi = dpi; + + nsvg__parseXML(input, nsvg__startElement, nsvg__endElement, nsvg__content, p); + + // Scale to viewBox + nsvg__scaleToViewbox(p, units); + + ret = p->image; + p->image = NULL; + + nsvg__deleteParser(p); + + return ret; +} + +NSVGimage *nsvgParseFromFile(const char *filename, const char *units, float dpi) +{ + FILE *fp = NULL; + size_t size; + char *data = NULL; + NSVGimage *image = NULL; + + fp = fopen(filename, "rb"); + if (!fp) + goto error; + fseek(fp, 0, SEEK_END); + size = ftell(fp); + fseek(fp, 0, SEEK_SET); + data = (char *)malloc(size + 1); + if (data == NULL) + goto error; + if (fread(data, 1, size, fp) != size) + goto error; + data[size] = '\0'; // Must be null terminated. + fclose(fp); + image = nsvgParse(data, units, dpi); + free(data); + + return image; + +error: + if (fp) + fclose(fp); + if (data) + free(data); + nsvgDelete(image); + return NULL; +} + +NSVGpath *nsvgDuplicatePath(NSVGpath *p) +{ + NSVGpath *res = NULL; + + if (p == NULL) + return NULL; + + res = (NSVGpath *)malloc(sizeof(NSVGpath)); + if (res == NULL) + goto error; + memset(res, 0, sizeof(NSVGpath)); + + res->pts = (float *)malloc(p->npts * 2 * sizeof(float)); + if (res->pts == NULL) + goto error; + memcpy(res->pts, p->pts, p->npts * sizeof(float) * 2); + res->npts = p->npts; + + memcpy(res->bounds, p->bounds, sizeof(p->bounds)); + + res->closed = p->closed; + + return res; + +error: + if (res != NULL) { + free(res->pts); + free(res); + } + return NULL; +} + +void nsvgDelete(NSVGimage *image) +{ + NSVGshape *snext, *shape; + if (image == NULL) + return; + shape = image->shapes; + while (shape != NULL) { + snext = shape->next; + nsvg__deletePaths(shape->paths); + nsvg__deletePaint(&shape->fill); + nsvg__deletePaint(&shape->stroke); + free(shape); + shape = snext; + } + free(image); +} + +/* + * Copyright (c) 2013-14 Mikko Mononen memon@inside.org + * + * This software is provided 'as-is', without any express or implied + * warranty. In no event will the authors be held liable for any damages + * arising from the use of this software. + * + * Permission is granted to anyone to use this software for any purpose, + * including commercial applications, and to alter it and redistribute it + * freely, subject to the following restrictions: + * + * 1. The origin of this software must not be misrepresented; you must not + * claim that you wrote the original software. If you use this software + * in a product, an acknowledgment in the product documentation would be + * appreciated but is not required. + * 2. Altered source versions must be plainly marked as such, and must not be + * misrepresented as being the original software. + * 3. This notice may not be removed or altered from any source distribution. + * + * The polygon rasterization is heavily based on stb_truetype rasterizer + * by Sean Barrett - http://nothings.org/ + * + */ + +typedef struct NSVGrasterizer NSVGrasterizer; + +/* Example Usage: + // Load SVG + NSVGimage* image; + image = nsvgParseFromFile("test.svg", "px", 96); + + // Create rasterizer (can be used to render multiple images). + struct NSVGrasterizer* rast = nsvgCreateRasterizer(); + // Allocate memory for image + unsigned char* img = malloc(w*h*4); + // Rasterize + nsvgRasterize(rast, image, 0,0,1, img, w, h, w*4); +*/ + +// Allocated rasterizer context. +NSVGrasterizer *nsvgCreateRasterizer(); + +// Rasterizes SVG image, returns RGBA image (non-premultiplied alpha) +// r - pointer to rasterizer context +// image - pointer to image to rasterize +// tx,ty - image offset (applied after scaling) +// scale - image scale +// dst - pointer to destination image data, 4 bytes per pixel (RGBA) +// w - width of the image to render +// h - height of the image to render +// stride - number of bytes per scaleline in the destination buffer +void nsvgRasterize(NSVGrasterizer *r, NSVGimage *image, float tx, float ty, float scale, + unsigned char *dst, int w, int h, int stride); + +// Deletes rasterizer context. +void nsvgDeleteRasterizer(NSVGrasterizer *); + +void nsvgRasterizeText(NSVGrasterizer *r, const NSVGimage *font, float tx, float ty, float scale, + unsigned char *dst, int w, int h, int stride, const char *text); + +#include + +#define NSVG__SUBSAMPLES 5 +#define NSVG__FIXSHIFT 10 +#define NSVG__FIX (1 << NSVG__FIXSHIFT) +#define NSVG__FIXMASK (NSVG__FIX - 1) +#define NSVG__MEMPAGE_SIZE 1024 + +typedef struct NSVGedge { + float x0, y0, x1, y1; + int dir; + struct NSVGedge *next; +} NSVGedge; + +typedef struct NSVGpoint { + float x, y; + float dx, dy; + float len; + float dmx, dmy; + unsigned char flags; +} NSVGpoint; + +typedef struct NSVGactiveEdge { + int x, dx; + float ey; + int dir; + struct NSVGactiveEdge *next; +} NSVGactiveEdge; + +typedef struct NSVGmemPage { + unsigned char mem[NSVG__MEMPAGE_SIZE]; + int size; + struct NSVGmemPage *next; +} NSVGmemPage; + +typedef struct NSVGcachedPaint { + char type; + char spread; + float xform[6]; + unsigned int colors[256]; +} NSVGcachedPaint; + +struct NSVGrasterizer { + float px, py; + + float tessTol; + float distTol; + + NSVGedge *edges; + int nedges; + int cedges; + + NSVGpoint *points; + int npoints; + int cpoints; + + NSVGpoint *points2; + int npoints2; + int cpoints2; + + NSVGactiveEdge *freelist; + NSVGmemPage *pages; + NSVGmemPage *curpage; + + unsigned char *scanline; + int cscanline; + + unsigned char *bitmap; + int width, height, stride; +}; + +NSVGrasterizer *nsvgCreateRasterizer() +{ + NSVGrasterizer *r = (NSVGrasterizer *)malloc(sizeof(NSVGrasterizer)); + if (r == NULL) + goto error; + memset(r, 0, sizeof(NSVGrasterizer)); + + r->tessTol = 0.25f; + r->distTol = 0.01f; + + return r; + +error: + nsvgDeleteRasterizer(r); + return NULL; +} + +void nsvgDeleteRasterizer(NSVGrasterizer *r) +{ + NSVGmemPage *p; + + if (r == NULL) + return; + + p = r->pages; + while (p != NULL) { + NSVGmemPage *next = p->next; + free(p); + p = next; + } + + if (r->edges) + free(r->edges); + if (r->points) + free(r->points); + if (r->points2) + free(r->points2); + if (r->scanline) + free(r->scanline); + + free(r); +} + +static NSVGmemPage *nsvg__nextPage(NSVGrasterizer *r, NSVGmemPage *cur) +{ + NSVGmemPage *newp; + + // If using existing chain, return the next page in chain + if (cur != NULL && cur->next != NULL) { + return cur->next; + } + + // Alloc new page + newp = (NSVGmemPage *)malloc(sizeof(NSVGmemPage)); + if (newp == NULL) + return NULL; + memset(newp, 0, sizeof(NSVGmemPage)); + + // Add to linked list + if (cur != NULL) + cur->next = newp; + else + r->pages = newp; + + return newp; +} + +static void nsvg__resetPool(NSVGrasterizer *r) +{ + NSVGmemPage *p = r->pages; + while (p != NULL) { + p->size = 0; + p = p->next; + } + r->curpage = r->pages; +} + +static unsigned char *nsvg__alloc(NSVGrasterizer *r, int size) +{ + unsigned char *buf; + if (size > NSVG__MEMPAGE_SIZE) + return NULL; + if (r->curpage == NULL || r->curpage->size + size > NSVG__MEMPAGE_SIZE) { + r->curpage = nsvg__nextPage(r, r->curpage); + } + buf = &r->curpage->mem[r->curpage->size]; + r->curpage->size += size; + return buf; +} + +static int nsvg__ptEquals(float x1, float y1, float x2, float y2, float tol) +{ + float dx = x2 - x1; + float dy = y2 - y1; + return dx * dx + dy * dy < tol * tol; +} + +static void nsvg__addPathPoint(NSVGrasterizer *r, float x, float y, int flags) +{ + NSVGpoint *pt; + + if (r->npoints > 0) { + pt = &r->points[r->npoints - 1]; + if (nsvg__ptEquals(pt->x, pt->y, x, y, r->distTol)) { + pt->flags = (unsigned char)(pt->flags | flags); + return; + } + } + + if (r->npoints + 1 > r->cpoints) { + r->cpoints = r->cpoints > 0 ? r->cpoints * 2 : 64; + r->points = (NSVGpoint *)realloc(r->points, sizeof(NSVGpoint) * r->cpoints); + if (r->points == NULL) + return; + } + + pt = &r->points[r->npoints]; + pt->x = x; + pt->y = y; + pt->flags = (unsigned char)flags; + r->npoints++; +} + +static void nsvg__appendPathPoint(NSVGrasterizer *r, NSVGpoint pt) +{ + if (r->npoints + 1 > r->cpoints) { + r->cpoints = r->cpoints > 0 ? r->cpoints * 2 : 64; + r->points = (NSVGpoint *)realloc(r->points, sizeof(NSVGpoint) * r->cpoints); + if (r->points == NULL) + return; + } + r->points[r->npoints] = pt; + r->npoints++; +} + +static void nsvg__duplicatePoints(NSVGrasterizer *r) +{ + if (r->npoints > r->cpoints2) { + r->cpoints2 = r->npoints; + r->points2 = (NSVGpoint *)realloc(r->points2, sizeof(NSVGpoint) * r->cpoints2); + if (r->points2 == NULL) + return; + } + + memcpy(r->points2, r->points, sizeof(NSVGpoint) * r->npoints); + r->npoints2 = r->npoints; +} + +static void nsvg__addEdge(NSVGrasterizer *r, float x0, float y0, float x1, float y1) +{ + NSVGedge *e; + + // Skip horizontal edges + if (y0 == y1) + return; + + if (r->nedges + 1 > r->cedges) { + r->cedges = r->cedges > 0 ? r->cedges * 2 : 64; + r->edges = (NSVGedge *)realloc(r->edges, sizeof(NSVGedge) * r->cedges); + if (r->edges == NULL) + return; + } + + e = &r->edges[r->nedges]; + r->nedges++; + + if (y0 < y1) { + e->x0 = x0; + e->y0 = y0; + e->x1 = x1; + e->y1 = y1; + e->dir = 1; + } else { + e->x0 = x1; + e->y0 = y1; + e->x1 = x0; + e->y1 = y0; + e->dir = -1; + } +} + +static float nsvg__normalize(float *x, float *y) +{ + float d = sqrtf((*x) * (*x) + (*y) * (*y)); + if (d > 1e-6f) { + float id = 1.0f / d; + *x *= id; + *y *= id; + } + return d; +} + +static float nsvg__absf(float x) +{ + return x < 0 ? -x : x; +} + +static void nsvg__flattenCubicBez(NSVGrasterizer *r, float x1, float y1, float x2, float y2, + float x3, float y3, float x4, float y4, int level, int type) +{ + float x12, y12, x23, y23, x34, y34, x123, y123, x234, y234, x1234, y1234; + float dx, dy, d2, d3; + + if (level > 10) + return; + + x12 = (x1 + x2) * 0.5f; + y12 = (y1 + y2) * 0.5f; + x23 = (x2 + x3) * 0.5f; + y23 = (y2 + y3) * 0.5f; + x34 = (x3 + x4) * 0.5f; + y34 = (y3 + y4) * 0.5f; + x123 = (x12 + x23) * 0.5f; + y123 = (y12 + y23) * 0.5f; + + dx = x4 - x1; + dy = y4 - y1; + d2 = nsvg__absf(((x2 - x4) * dy - (y2 - y4) * dx)); + d3 = nsvg__absf(((x3 - x4) * dy - (y3 - y4) * dx)); + + if ((d2 + d3) * (d2 + d3) < r->tessTol * (dx * dx + dy * dy)) { + nsvg__addPathPoint(r, x4, y4, type); + return; + } + + x234 = (x23 + x34) * 0.5f; + y234 = (y23 + y34) * 0.5f; + x1234 = (x123 + x234) * 0.5f; + y1234 = (y123 + y234) * 0.5f; + + nsvg__flattenCubicBez(r, x1, y1, x12, y12, x123, y123, x1234, y1234, level + 1, 0); + nsvg__flattenCubicBez(r, x1234, y1234, x234, y234, x34, y34, x4, y4, level + 1, type); +} + +static void nsvg__flattenShape(NSVGrasterizer *r, NSVGshape *shape, float scale) +{ + int i, j; + NSVGpath *path; + + for (path = shape->paths; path != NULL; path = path->next) { + r->npoints = 0; + // Flatten path + nsvg__addPathPoint(r, path->pts[0] * scale, path->pts[1] * scale, 0); + for (i = 0; i < path->npts - 1; i += 3) { + float *p = &path->pts[i * 2]; + nsvg__flattenCubicBez(r, p[0] * scale, p[1] * scale, p[2] * scale, + p[3] * scale, p[4] * scale, p[5] * scale, + p[6] * scale, p[7] * scale, 0, 0); + } + // Close path + nsvg__addPathPoint(r, path->pts[0] * scale, path->pts[1] * scale, 0); + // Build edges + for (i = 0, j = r->npoints - 1; i < r->npoints; j = i++) + nsvg__addEdge(r, r->points[j].x, r->points[j].y, r->points[i].x, + r->points[i].y); + } +} + +enum NSVGpointFlags { NSVG_PT_CORNER = 0x01, NSVG_PT_BEVEL = 0x02, NSVG_PT_LEFT = 0x04 }; + +static void nsvg__initClosed(NSVGpoint *left, NSVGpoint *right, NSVGpoint *p0, NSVGpoint *p1, + float lineWidth) +{ + float w = lineWidth * 0.5f; + float dx = p1->x - p0->x; + float dy = p1->y - p0->y; + float len = nsvg__normalize(&dx, &dy); + float px = p0->x + dx * len * 0.5f, py = p0->y + dy * len * 0.5f; + float dlx = dy, dly = -dx; + float lx = px - dlx * w, ly = py - dly * w; + float rx = px + dlx * w, ry = py + dly * w; + left->x = lx; + left->y = ly; + right->x = rx; + right->y = ry; +} + +static void nsvg__buttCap(NSVGrasterizer *r, NSVGpoint *left, NSVGpoint *right, NSVGpoint *p, + float dx, float dy, float lineWidth, int connect) +{ + float w = lineWidth * 0.5f; + float px = p->x, py = p->y; + float dlx = dy, dly = -dx; + float lx = px - dlx * w, ly = py - dly * w; + float rx = px + dlx * w, ry = py + dly * w; + + nsvg__addEdge(r, lx, ly, rx, ry); + + if (connect) { + nsvg__addEdge(r, left->x, left->y, lx, ly); + nsvg__addEdge(r, rx, ry, right->x, right->y); + } + left->x = lx; + left->y = ly; + right->x = rx; + right->y = ry; +} + +static void nsvg__squareCap(NSVGrasterizer *r, NSVGpoint *left, NSVGpoint *right, NSVGpoint *p, + float dx, float dy, float lineWidth, int connect) +{ + float w = lineWidth * 0.5f; + float px = p->x - dx * w, py = p->y - dy * w; + float dlx = dy, dly = -dx; + float lx = px - dlx * w, ly = py - dly * w; + float rx = px + dlx * w, ry = py + dly * w; + + nsvg__addEdge(r, lx, ly, rx, ry); + + if (connect) { + nsvg__addEdge(r, left->x, left->y, lx, ly); + nsvg__addEdge(r, rx, ry, right->x, right->y); + } + left->x = lx; + left->y = ly; + right->x = rx; + right->y = ry; +} + +#ifndef NSVG_PI +#define NSVG_PI (3.14159265358979323846264338327f) +#endif + +static void nsvg__roundCap(NSVGrasterizer *r, NSVGpoint *left, NSVGpoint *right, NSVGpoint *p, + float dx, float dy, float lineWidth, int ncap, int connect) +{ + int i; + float w = lineWidth * 0.5f; + float px = p->x, py = p->y; + float dlx = dy, dly = -dx; + float lx = 0, ly = 0, rx = 0, ry = 0, prevx = 0, prevy = 0; + + for (i = 0; i < ncap; i++) { + float a = (float)i / (float)(ncap - 1) * NSVG_PI; + float ax = cosf(a) * w, ay = sinf(a) * w; + float x = px - dlx * ax - dx * ay; + float y = py - dly * ax - dy * ay; + + if (i > 0) + nsvg__addEdge(r, prevx, prevy, x, y); + + prevx = x; + prevy = y; + + if (i == 0) { + lx = x; + ly = y; + } else if (i == ncap - 1) { + rx = x; + ry = y; + } + } + + if (connect) { + nsvg__addEdge(r, left->x, left->y, lx, ly); + nsvg__addEdge(r, rx, ry, right->x, right->y); + } + + left->x = lx; + left->y = ly; + right->x = rx; + right->y = ry; +} + +static void nsvg__bevelJoin(NSVGrasterizer *r, NSVGpoint *left, NSVGpoint *right, NSVGpoint *p0, + NSVGpoint *p1, float lineWidth) +{ + float w = lineWidth * 0.5f; + float dlx0 = p0->dy, dly0 = -p0->dx; + float dlx1 = p1->dy, dly1 = -p1->dx; + float lx0 = p1->x - (dlx0 * w), ly0 = p1->y - (dly0 * w); + float rx0 = p1->x + (dlx0 * w), ry0 = p1->y + (dly0 * w); + float lx1 = p1->x - (dlx1 * w), ly1 = p1->y - (dly1 * w); + float rx1 = p1->x + (dlx1 * w), ry1 = p1->y + (dly1 * w); + + nsvg__addEdge(r, lx0, ly0, left->x, left->y); + nsvg__addEdge(r, lx1, ly1, lx0, ly0); + + nsvg__addEdge(r, right->x, right->y, rx0, ry0); + nsvg__addEdge(r, rx0, ry0, rx1, ry1); + + left->x = lx1; + left->y = ly1; + right->x = rx1; + right->y = ry1; +} + +static void nsvg__miterJoin(NSVGrasterizer *r, NSVGpoint *left, NSVGpoint *right, NSVGpoint *p0, + NSVGpoint *p1, float lineWidth) +{ + float w = lineWidth * 0.5f; + float dlx0 = p0->dy, dly0 = -p0->dx; + float dlx1 = p1->dy, dly1 = -p1->dx; + float lx0, rx0, lx1, rx1; + float ly0, ry0, ly1, ry1; + + if (p1->flags & NSVG_PT_LEFT) { + lx0 = lx1 = p1->x - p1->dmx * w; + ly0 = ly1 = p1->y - p1->dmy * w; + nsvg__addEdge(r, lx1, ly1, left->x, left->y); + + rx0 = p1->x + (dlx0 * w); + ry0 = p1->y + (dly0 * w); + rx1 = p1->x + (dlx1 * w); + ry1 = p1->y + (dly1 * w); + nsvg__addEdge(r, right->x, right->y, rx0, ry0); + nsvg__addEdge(r, rx0, ry0, rx1, ry1); + } else { + lx0 = p1->x - (dlx0 * w); + ly0 = p1->y - (dly0 * w); + lx1 = p1->x - (dlx1 * w); + ly1 = p1->y - (dly1 * w); + nsvg__addEdge(r, lx0, ly0, left->x, left->y); + nsvg__addEdge(r, lx1, ly1, lx0, ly0); + + rx0 = rx1 = p1->x + p1->dmx * w; + ry0 = ry1 = p1->y + p1->dmy * w; + nsvg__addEdge(r, right->x, right->y, rx1, ry1); + } + + left->x = lx1; + left->y = ly1; + right->x = rx1; + right->y = ry1; +} + +static void nsvg__roundJoin(NSVGrasterizer *r, NSVGpoint *left, NSVGpoint *right, NSVGpoint *p0, + NSVGpoint *p1, float lineWidth, int ncap) +{ + int i, n; + float w = lineWidth * 0.5f; + float dlx0 = p0->dy, dly0 = -p0->dx; + float dlx1 = p1->dy, dly1 = -p1->dx; + float a0 = atan2f(dly0, dlx0); + float a1 = atan2f(dly1, dlx1); + float da = a1 - a0; + float lx, ly, rx, ry; + + if (da < NSVG_PI) + da += NSVG_PI * 2; + if (da > NSVG_PI) + da -= NSVG_PI * 2; + + n = (int)ceilf((nsvg__absf(da) / NSVG_PI) * (float)ncap); + if (n < 2) + n = 2; + if (n > ncap) + n = ncap; + + lx = left->x; + ly = left->y; + rx = right->x; + ry = right->y; + + for (i = 0; i < n; i++) { + float u = (float)i / (float)(n - 1); + float a = a0 + u * da; + float ax = cosf(a) * w, ay = sinf(a) * w; + float lx1 = p1->x - ax, ly1 = p1->y - ay; + float rx1 = p1->x + ax, ry1 = p1->y + ay; + + nsvg__addEdge(r, lx1, ly1, lx, ly); + nsvg__addEdge(r, rx, ry, rx1, ry1); + + lx = lx1; + ly = ly1; + rx = rx1; + ry = ry1; + } + + left->x = lx; + left->y = ly; + right->x = rx; + right->y = ry; +} + +static void nsvg__straightJoin(NSVGrasterizer *r, NSVGpoint *left, NSVGpoint *right, NSVGpoint *p1, + float lineWidth) +{ + float w = lineWidth * 0.5f; + float lx = p1->x - (p1->dmx * w), ly = p1->y - (p1->dmy * w); + float rx = p1->x + (p1->dmx * w), ry = p1->y + (p1->dmy * w); + + nsvg__addEdge(r, lx, ly, left->x, left->y); + nsvg__addEdge(r, right->x, right->y, rx, ry); + + left->x = lx; + left->y = ly; + right->x = rx; + right->y = ry; +} + +static int nsvg__curveDivs(float r, float arc, float tol) +{ + float da = acosf(r / (r + tol)) * 2.0f; + int divs = (int)ceilf(arc / da); + if (divs < 2) + divs = 2; + return divs; +} + +static void nsvg__expandStroke(NSVGrasterizer *r, NSVGpoint *points, int npoints, int closed, + int lineJoin, int lineCap, float lineWidth) +{ + int ncap = nsvg__curveDivs(lineWidth * 0.5f, NSVG_PI, + r->tessTol); // Calculate divisions per half circle. + NSVGpoint left = { 0, 0, 0, 0, 0, 0, 0, 0 }, right = { 0, 0, 0, 0, 0, 0, 0, 0 }, + firstLeft = { 0, 0, 0, 0, 0, 0, 0, 0 }, firstRight = { 0, 0, 0, 0, 0, 0, 0, 0 }; + NSVGpoint *p0, *p1; + int j, s, e; + + // Build stroke edges + if (closed) { + // Looping + p0 = &points[npoints - 1]; + p1 = &points[0]; + s = 0; + e = npoints; + } else { + // Add cap + p0 = &points[0]; + p1 = &points[1]; + s = 1; + e = npoints - 1; + } + + if (closed) { + nsvg__initClosed(&left, &right, p0, p1, lineWidth); + firstLeft = left; + firstRight = right; + } else { + // Add cap + float dx = p1->x - p0->x; + float dy = p1->y - p0->y; + nsvg__normalize(&dx, &dy); + if (lineCap == NSVG_CAP_BUTT) + nsvg__buttCap(r, &left, &right, p0, dx, dy, lineWidth, 0); + else if (lineCap == NSVG_CAP_SQUARE) + nsvg__squareCap(r, &left, &right, p0, dx, dy, lineWidth, 0); + else if (lineCap == NSVG_CAP_ROUND) + nsvg__roundCap(r, &left, &right, p0, dx, dy, lineWidth, ncap, 0); + } + + for (j = s; j < e; ++j) { + if (p1->flags & NSVG_PT_CORNER) { + if (lineJoin == NSVG_JOIN_ROUND) + nsvg__roundJoin(r, &left, &right, p0, p1, lineWidth, ncap); + else if (lineJoin == NSVG_JOIN_BEVEL || (p1->flags & NSVG_PT_BEVEL)) + nsvg__bevelJoin(r, &left, &right, p0, p1, lineWidth); + else + nsvg__miterJoin(r, &left, &right, p0, p1, lineWidth); + } else { + nsvg__straightJoin(r, &left, &right, p1, lineWidth); + } + p0 = p1++; + } + + if (closed) { + // Loop it + nsvg__addEdge(r, firstLeft.x, firstLeft.y, left.x, left.y); + nsvg__addEdge(r, right.x, right.y, firstRight.x, firstRight.y); + } else { + // Add cap + float dx = p1->x - p0->x; + float dy = p1->y - p0->y; + nsvg__normalize(&dx, &dy); + if (lineCap == NSVG_CAP_BUTT) + nsvg__buttCap(r, &right, &left, p1, -dx, -dy, lineWidth, 1); + else if (lineCap == NSVG_CAP_SQUARE) + nsvg__squareCap(r, &right, &left, p1, -dx, -dy, lineWidth, 1); + else if (lineCap == NSVG_CAP_ROUND) + nsvg__roundCap(r, &right, &left, p1, -dx, -dy, lineWidth, ncap, 1); + } +} + +static void nsvg__prepareStroke(NSVGrasterizer *r, float miterLimit, int lineJoin) +{ + int i, j; + NSVGpoint *p0, *p1; + + p0 = &r->points[r->npoints - 1]; + p1 = &r->points[0]; + for (i = 0; i < r->npoints; i++) { + // Calculate segment direction and length + p0->dx = p1->x - p0->x; + p0->dy = p1->y - p0->y; + p0->len = nsvg__normalize(&p0->dx, &p0->dy); + // Advance + p0 = p1++; + } + + // calculate joins + p0 = &r->points[r->npoints - 1]; + p1 = &r->points[0]; + for (j = 0; j < r->npoints; j++) { + float dlx0, dly0, dlx1, dly1, dmr2, cross; + dlx0 = p0->dy; + dly0 = -p0->dx; + dlx1 = p1->dy; + dly1 = -p1->dx; + // Calculate extrusions + p1->dmx = (dlx0 + dlx1) * 0.5f; + p1->dmy = (dly0 + dly1) * 0.5f; + dmr2 = p1->dmx * p1->dmx + p1->dmy * p1->dmy; + if (dmr2 > 0.000001f) { + float s2 = 1.0f / dmr2; + if (s2 > 600.0f) { + s2 = 600.0f; + } + p1->dmx *= s2; + p1->dmy *= s2; + } + + // Clear flags, but keep the corner. + p1->flags = (p1->flags & NSVG_PT_CORNER) ? NSVG_PT_CORNER : 0; + + // Keep track of left turns. + cross = p1->dx * p0->dy - p0->dx * p1->dy; + if (cross > 0.0f) + p1->flags |= NSVG_PT_LEFT; + + // Check to see if the corner needs to be beveled. + if (p1->flags & NSVG_PT_CORNER) { + if ((dmr2 * miterLimit * miterLimit) < 1.0f || + lineJoin == NSVG_JOIN_BEVEL || lineJoin == NSVG_JOIN_ROUND) { + p1->flags |= NSVG_PT_BEVEL; + } + } + + p0 = p1++; + } +} + +static void nsvg__flattenShapeStroke(NSVGrasterizer *r, NSVGshape *shape, float scale) +{ + int i, j, closed; + NSVGpath *path; + NSVGpoint *p0, *p1; + float miterLimit = shape->miterLimit; + int lineJoin = shape->strokeLineJoin; + int lineCap = shape->strokeLineCap; + float lineWidth = shape->strokeWidth * scale; + + for (path = shape->paths; path != NULL; path = path->next) { + // Flatten path + r->npoints = 0; + nsvg__addPathPoint(r, path->pts[0] * scale, path->pts[1] * scale, NSVG_PT_CORNER); + for (i = 0; i < path->npts - 1; i += 3) { + float *p = &path->pts[i * 2]; + nsvg__flattenCubicBez(r, p[0] * scale, p[1] * scale, p[2] * scale, + p[3] * scale, p[4] * scale, p[5] * scale, + p[6] * scale, p[7] * scale, 0, NSVG_PT_CORNER); + } + if (r->npoints < 2) + continue; + + closed = path->closed; + + // If the first and last points are the same, remove the last, mark as closed path. + p0 = &r->points[r->npoints - 1]; + p1 = &r->points[0]; + if (nsvg__ptEquals(p0->x, p0->y, p1->x, p1->y, r->distTol)) { + r->npoints--; + p0 = &r->points[r->npoints - 1]; + closed = 1; + } + + if (shape->strokeDashCount > 0) { + int idash = 0, dashState = 1; + float totalDist = 0, dashLen, allDashLen, dashOffset; + NSVGpoint cur; + + if (closed) + nsvg__appendPathPoint(r, r->points[0]); + + // Duplicate points -> points2. + nsvg__duplicatePoints(r); + + r->npoints = 0; + cur = r->points2[0]; + nsvg__appendPathPoint(r, cur); + + // Figure out dash offset. + allDashLen = 0; + for (j = 0; j < shape->strokeDashCount; j++) + allDashLen += shape->strokeDashArray[j]; + if (shape->strokeDashCount & 1) + allDashLen *= 2.0f; + // Find location inside pattern + dashOffset = fmodf(shape->strokeDashOffset, allDashLen); + if (dashOffset < 0.0f) + dashOffset += allDashLen; + + while (dashOffset > shape->strokeDashArray[idash]) { + dashOffset -= shape->strokeDashArray[idash]; + idash = (idash + 1) % shape->strokeDashCount; + } + dashLen = (shape->strokeDashArray[idash] - dashOffset) * scale; + + for (j = 1; j < r->npoints2;) { + float dx = r->points2[j].x - cur.x; + float dy = r->points2[j].y - cur.y; + float dist = sqrtf(dx * dx + dy * dy); + + if ((totalDist + dist) > dashLen) { + // Calculate intermediate point + float d = (dashLen - totalDist) / dist; + float x = cur.x + dx * d; + float y = cur.y + dy * d; + nsvg__addPathPoint(r, x, y, NSVG_PT_CORNER); + + // Stroke + if (r->npoints > 1 && dashState) { + nsvg__prepareStroke(r, miterLimit, lineJoin); + nsvg__expandStroke(r, r->points, r->npoints, 0, + lineJoin, lineCap, lineWidth); + } + // Advance dash pattern + dashState = !dashState; + idash = (idash + 1) % shape->strokeDashCount; + dashLen = shape->strokeDashArray[idash] * scale; + // Restart + cur.x = x; + cur.y = y; + cur.flags = NSVG_PT_CORNER; + totalDist = 0.0f; + r->npoints = 0; + nsvg__appendPathPoint(r, cur); + } else { + totalDist += dist; + cur = r->points2[j]; + nsvg__appendPathPoint(r, cur); + j++; + } + } + // Stroke any leftover path + if (r->npoints > 1 && dashState) + nsvg__expandStroke(r, r->points, r->npoints, 0, lineJoin, lineCap, + lineWidth); + } else { + nsvg__prepareStroke(r, miterLimit, lineJoin); + nsvg__expandStroke(r, r->points, r->npoints, closed, lineJoin, lineCap, + lineWidth); + } + } +} + +static int nsvg__cmpEdge(const void *p, const void *q) +{ + const NSVGedge *a = (const NSVGedge *)p; + const NSVGedge *b = (const NSVGedge *)q; + + if (a->y0 < b->y0) + return -1; + if (a->y0 > b->y0) + return 1; + return 0; +} + +static NSVGactiveEdge *nsvg__addActive(NSVGrasterizer *r, NSVGedge *e, float startPoint) +{ + NSVGactiveEdge *z; + + if (r->freelist != NULL) { + // Restore from freelist. + z = r->freelist; + r->freelist = z->next; + } else { + // Alloc new edge. + z = (NSVGactiveEdge *)nsvg__alloc(r, sizeof(NSVGactiveEdge)); + if (z == NULL) + return NULL; + } + + float dxdy = (e->x1 - e->x0) / (e->y1 - e->y0); + // STBTT_assert(e->y0 <= start_point); + // round dx down to avoid going too far + if (dxdy < 0) + z->dx = (int)(-floorf(NSVG__FIX * -dxdy)); + else + z->dx = (int)floorf(NSVG__FIX * dxdy); + z->x = (int)floorf(NSVG__FIX * (e->x0 + dxdy * (startPoint - e->y0))); + // z->x -= off_x * FIX; + z->ey = e->y1; + z->next = 0; + z->dir = e->dir; + + return z; +} + +static void nsvg__freeActive(NSVGrasterizer *r, NSVGactiveEdge *z) +{ + z->next = r->freelist; + r->freelist = z; +} + +static void nsvg__fillScanline(unsigned char *scanline, int len, int x0, int x1, int maxWeight, + int *xmin, int *xmax) +{ + int i = x0 >> NSVG__FIXSHIFT; + int j = x1 >> NSVG__FIXSHIFT; + if (i < *xmin) + *xmin = i; + if (j > *xmax) + *xmax = j; + if (i < len && j >= 0) { + if (i == j) { + // x0,x1 are the same pixel, so compute combined coverage + scanline[i] = (unsigned char)(scanline[i] + + ((x1 - x0) * maxWeight >> NSVG__FIXSHIFT)); + } else { + if (i >= 0) // add antialiasing for x0 + scanline[i] = (unsigned char)(scanline[i] + + (((NSVG__FIX - (x0 & NSVG__FIXMASK)) * + maxWeight) >> + NSVG__FIXSHIFT)); + else + i = -1; // clip + + if (j < len) // add antialiasing for x1 + scanline[j] = (unsigned char)(scanline[j] + + (((x1 & NSVG__FIXMASK) * maxWeight) >> + NSVG__FIXSHIFT)); + else + j = len; // clip + + for (++i; i < j; ++i) // fill pixels between x0 and x1 + scanline[i] = (unsigned char)(scanline[i] + maxWeight); + } + } +} + +// note: this routine clips fills that extend off the edges... ideally this +// wouldn't happen, but it could happen if the truetype glyph bounding boxes +// are wrong, or if the user supplies a too-small bitmap +static void nsvg__fillActiveEdges(unsigned char *scanline, int len, NSVGactiveEdge *e, + int maxWeight, int *xmin, int *xmax, char fillRule) +{ + // non-zero winding fill + int x0 = 0, w = 0; + + if (fillRule == NSVG_FILLRULE_NONZERO) { + // Non-zero + while (e != NULL) { + if (w == 0) { + // if we're currently at zero, we need to record the edge start + // point + x0 = e->x; + w += e->dir; + } else { + int x1 = e->x; + w += e->dir; + // if we went to zero, we need to draw + if (w == 0) + nsvg__fillScanline(scanline, len, x0, x1, maxWeight, xmin, + xmax); + } + e = e->next; + } + } else if (fillRule == NSVG_FILLRULE_EVENODD) { + // Even-odd + while (e != NULL) { + if (w == 0) { + // if we're currently at zero, we need to record the edge start + // point + x0 = e->x; + w = 1; + } else { + int x1 = e->x; + w = 0; + nsvg__fillScanline(scanline, len, x0, x1, maxWeight, xmin, xmax); + } + e = e->next; + } + } +} + +static float nsvg__clampf(float a, float mn, float mx) +{ + return a < mn ? mn : (a > mx ? mx : a); +} + +static unsigned int nsvg__RGBA(unsigned char r, unsigned char g, unsigned char b, unsigned char a) +{ + return (r) | (g << 8) | (b << 16) | (a << 24); +} + +static unsigned int nsvg__lerpRGBA(unsigned int c0, unsigned int c1, float u) +{ + int iu = (int)(nsvg__clampf(u, 0.0f, 1.0f) * 256.0f); + int r = (((c0)&0xff) * (256 - iu) + (((c1)&0xff) * iu)) >> 8; + int g = (((c0 >> 8) & 0xff) * (256 - iu) + (((c1 >> 8) & 0xff) * iu)) >> 8; + int b = (((c0 >> 16) & 0xff) * (256 - iu) + (((c1 >> 16) & 0xff) * iu)) >> 8; + int a = (((c0 >> 24) & 0xff) * (256 - iu) + (((c1 >> 24) & 0xff) * iu)) >> 8; + return nsvg__RGBA((unsigned char)r, (unsigned char)g, (unsigned char)b, (unsigned char)a); +} + +static unsigned int nsvg__applyOpacity(unsigned int c, float u) +{ + int iu = (int)(nsvg__clampf(u, 0.0f, 1.0f) * 256.0f); + int r = (c)&0xff; + int g = (c >> 8) & 0xff; + int b = (c >> 16) & 0xff; + int a = (((c >> 24) & 0xff) * iu) >> 8; + return nsvg__RGBA((unsigned char)r, (unsigned char)g, (unsigned char)b, (unsigned char)a); +} + +static inline int nsvg__div255(int x) +{ + return ((x + 1) * 257) >> 16; +} + +static void nsvg__scanlineSolid(unsigned char *dst, int count, unsigned char *cover, int x, int y, + float tx, float ty, float scale, NSVGcachedPaint *cache) +{ + + if (cache->type == NSVG_PAINT_COLOR) { + int i, cr, cg, cb, ca; + cr = cache->colors[0] & 0xff; + cg = (cache->colors[0] >> 8) & 0xff; + cb = (cache->colors[0] >> 16) & 0xff; + ca = (cache->colors[0] >> 24) & 0xff; + + for (i = 0; i < count; i++) { + int r, g, b; + int a = nsvg__div255((int)cover[0] * ca); + int ia = 255 - a; + // Premultiply + r = nsvg__div255(cr * a); + g = nsvg__div255(cg * a); + b = nsvg__div255(cb * a); + + // Blend over + r += nsvg__div255(ia * (int)dst[0]); + g += nsvg__div255(ia * (int)dst[1]); + b += nsvg__div255(ia * (int)dst[2]); + a += nsvg__div255(ia * (int)dst[3]); + + dst[0] = (unsigned char)r; + dst[1] = (unsigned char)g; + dst[2] = (unsigned char)b; + dst[3] = (unsigned char)a; + + cover++; + dst += 4; + } + } else if (cache->type == NSVG_PAINT_LINEAR_GRADIENT) { + // TODO: spread modes. + // TODO: plenty of opportunities to optimize. + float fx, fy, dx, gy; + float *t = cache->xform; + int i, cr, cg, cb, ca; + unsigned int c; + + fx = ((float)x - tx) / scale; + fy = ((float)y - ty) / scale; + dx = 1.0f / scale; + + for (i = 0; i < count; i++) { + int r, g, b, a, ia; + gy = fx * t[1] + fy * t[3] + t[5]; + c = cache->colors[(int)nsvg__clampf(gy * 255.0f, 0, 255.0f)]; + cr = (c)&0xff; + cg = (c >> 8) & 0xff; + cb = (c >> 16) & 0xff; + ca = (c >> 24) & 0xff; + + a = nsvg__div255((int)cover[0] * ca); + ia = 255 - a; + + // Premultiply + r = nsvg__div255(cr * a); + g = nsvg__div255(cg * a); + b = nsvg__div255(cb * a); + + // Blend over + r += nsvg__div255(ia * (int)dst[0]); + g += nsvg__div255(ia * (int)dst[1]); + b += nsvg__div255(ia * (int)dst[2]); + a += nsvg__div255(ia * (int)dst[3]); + + dst[0] = (unsigned char)r; + dst[1] = (unsigned char)g; + dst[2] = (unsigned char)b; + dst[3] = (unsigned char)a; + + cover++; + dst += 4; + fx += dx; + } + } else if (cache->type == NSVG_PAINT_RADIAL_GRADIENT) { + // TODO: spread modes. + // TODO: plenty of opportunities to optimize. + // TODO: focus (fx,fy) + float fx, fy, dx, gx, gy, gd; + float *t = cache->xform; + int i, cr, cg, cb, ca; + unsigned int c; + + fx = ((float)x - tx) / scale; + fy = ((float)y - ty) / scale; + dx = 1.0f / scale; + + for (i = 0; i < count; i++) { + int r, g, b, a, ia; + gx = fx * t[0] + fy * t[2] + t[4]; + gy = fx * t[1] + fy * t[3] + t[5]; + gd = sqrtf(gx * gx + gy * gy); + c = cache->colors[(int)nsvg__clampf(gd * 255.0f, 0, 255.0f)]; + cr = (c)&0xff; + cg = (c >> 8) & 0xff; + cb = (c >> 16) & 0xff; + ca = (c >> 24) & 0xff; + + a = nsvg__div255((int)cover[0] * ca); + ia = 255 - a; + + // Premultiply + r = nsvg__div255(cr * a); + g = nsvg__div255(cg * a); + b = nsvg__div255(cb * a); + + // Blend over + r += nsvg__div255(ia * (int)dst[0]); + g += nsvg__div255(ia * (int)dst[1]); + b += nsvg__div255(ia * (int)dst[2]); + a += nsvg__div255(ia * (int)dst[3]); + + dst[0] = (unsigned char)r; + dst[1] = (unsigned char)g; + dst[2] = (unsigned char)b; + dst[3] = (unsigned char)a; + + cover++; + dst += 4; + fx += dx; + } + } +} + +static void nsvg__rasterizeSortedEdges(NSVGrasterizer *r, float tx, float ty, float scale, + NSVGcachedPaint *cache, char fillRule) +{ + NSVGactiveEdge *active = NULL; + int y, s; + int e = 0; + int maxWeight = (255 / NSVG__SUBSAMPLES); // weight per vertical scanline + int xmin, xmax; + + for (y = 0; y < r->height; y++) { + memset(r->scanline, 0, r->width); + xmin = r->width; + xmax = 0; + for (s = 0; s < NSVG__SUBSAMPLES; ++s) { + // find center of pixel for this scanline + float scany = (float)(y * NSVG__SUBSAMPLES + s) + 0.5f; + NSVGactiveEdge **step = &active; + + // update all active edges; + // remove all active edges that terminate before the center of this scanline + while (*step) { + NSVGactiveEdge *z = *step; + if (z->ey <= scany) { + *step = z->next; // delete from list + // NSVG__assert(z->valid); + nsvg__freeActive(r, z); + } else { + z->x += z->dx; // advance to position for current scanline + step = &((*step)->next); // advance through list + } + } + + // resort the list if needed + for (;;) { + int changed = 0; + step = &active; + while (*step && (*step)->next) { + if ((*step)->x > (*step)->next->x) { + NSVGactiveEdge *t = *step; + NSVGactiveEdge *q = t->next; + t->next = q->next; + q->next = t; + *step = q; + changed = 1; + } + step = &(*step)->next; + } + if (!changed) + break; + } + + // insert all edges that start before the center of this scanline -- omit + // ones that also end on this scanline + while (e < r->nedges && r->edges[e].y0 <= scany) { + if (r->edges[e].y1 > scany) { + NSVGactiveEdge *z = nsvg__addActive(r, &r->edges[e], scany); + if (z == NULL) + break; + // find insertion point + if (active == NULL) { + active = z; + } else if (z->x < active->x) { + // insert at front + z->next = active; + active = z; + } else { + // find thing to insert AFTER + NSVGactiveEdge *p = active; + while (p->next && p->next->x < z->x) + p = p->next; + // at this point, p->next->x is NOT < z->x + z->next = p->next; + p->next = z; + } + } + e++; + } + + // now process all active edges in non-zero fashion + if (active != NULL) + nsvg__fillActiveEdges(r->scanline, r->width, active, maxWeight, + &xmin, &xmax, fillRule); + } + // Blit + if (xmin < 0) + xmin = 0; + if (xmax > r->width - 1) + xmax = r->width - 1; + if (xmin <= xmax) { + nsvg__scanlineSolid(&r->bitmap[y * r->stride] + xmin * 4, xmax - xmin + 1, + &r->scanline[xmin], xmin, y, tx, ty, scale, cache); + } + } +} + +static void nsvg__unpremultiplyAlpha(unsigned char *image, int w, int h, int stride) +{ + int x, y; + + // Unpremultiply + for (y = 0; y < h; y++) { + unsigned char *row = &image[y * stride]; + for (x = 0; x < w; x++) { + int r = row[0], g = row[1], b = row[2], a = row[3]; + if (a != 0) { + row[0] = (unsigned char)(r * 255 / a); + row[1] = (unsigned char)(g * 255 / a); + row[2] = (unsigned char)(b * 255 / a); + } + row += 4; + } + } + + // Defringe + for (y = 0; y < h; y++) { + unsigned char *row = &image[y * stride]; + for (x = 0; x < w; x++) { + int r = 0, g = 0, b = 0, a = row[3], n = 0; + if (a == 0) { + if (x - 1 > 0 && row[-1] != 0) { + r += row[-4]; + g += row[-3]; + b += row[-2]; + n++; + } + if (x + 1 < w && row[7] != 0) { + r += row[4]; + g += row[5]; + b += row[6]; + n++; + } + if (y - 1 > 0 && row[-stride + 3] != 0) { + r += row[-stride]; + g += row[-stride + 1]; + b += row[-stride + 2]; + n++; + } + if (y + 1 < h && row[stride + 3] != 0) { + r += row[stride]; + g += row[stride + 1]; + b += row[stride + 2]; + n++; + } + if (n > 0) { + row[0] = (unsigned char)(r / n); + row[1] = (unsigned char)(g / n); + row[2] = (unsigned char)(b / n); + } + } + row += 4; + } + } +} + +static void nsvg__initPaint(NSVGcachedPaint *cache, NSVGpaint *paint, float opacity) +{ + int i, j; + NSVGgradient *grad; + + cache->type = paint->type; + + if (paint->type == NSVG_PAINT_COLOR) { + cache->colors[0] = nsvg__applyOpacity(paint->color, opacity); + return; + } + + grad = paint->gradient; + + cache->spread = grad->spread; + memcpy(cache->xform, grad->xform, sizeof(float) * 6); + + if (grad->nstops == 0) { + for (i = 0; i < 256; i++) + cache->colors[i] = 0; + } + if (grad->nstops == 1) { + for (i = 0; i < 256; i++) + cache->colors[i] = nsvg__applyOpacity(grad->stops[i].color, opacity); + } else { + unsigned int ca, cb = 0; + float ua, ub, du, u; + int ia, ib, count; + + ca = nsvg__applyOpacity(grad->stops[0].color, opacity); + ua = nsvg__clampf(grad->stops[0].offset, 0, 1); + ub = nsvg__clampf(grad->stops[grad->nstops - 1].offset, ua, 1); + ia = (int)(ua * 255.0f); + ib = (int)(ub * 255.0f); + for (i = 0; i < ia; i++) { + cache->colors[i] = ca; + } + + for (i = 0; i < grad->nstops - 1; i++) { + ca = nsvg__applyOpacity(grad->stops[i].color, opacity); + cb = nsvg__applyOpacity(grad->stops[i + 1].color, opacity); + ua = nsvg__clampf(grad->stops[i].offset, 0, 1); + ub = nsvg__clampf(grad->stops[i + 1].offset, 0, 1); + ia = (int)(ua * 255.0f); + ib = (int)(ub * 255.0f); + count = ib - ia; + if (count <= 0) + continue; + u = 0; + du = 1.0f / (float)count; + for (j = 0; j < count; j++) { + cache->colors[ia + j] = nsvg__lerpRGBA(ca, cb, u); + u += du; + } + } + + for (i = ib; i < 256; i++) + cache->colors[i] = cb; + } +} + +/* +static void dumpEdges(NSVGrasterizer* r, const char* name) +{ + float xmin = 0, xmax = 0, ymin = 0, ymax = 0; + NSVGedge *e = NULL; + int i; + if (r->nedges == 0) return; + FILE* fp = fopen(name, "w"); + if (fp == NULL) return; + + xmin = xmax = r->edges[0].x0; + ymin = ymax = r->edges[0].y0; + for (i = 0; i < r->nedges; i++) { + e = &r->edges[i]; + xmin = nsvg__minf(xmin, e->x0); + xmin = nsvg__minf(xmin, e->x1); + xmax = nsvg__maxf(xmax, e->x0); + xmax = nsvg__maxf(xmax, e->x1); + ymin = nsvg__minf(ymin, e->y0); + ymin = nsvg__minf(ymin, e->y1); + ymax = nsvg__maxf(ymax, e->y0); + ymax = nsvg__maxf(ymax, e->y1); + } + + fprintf(fp, "", xmin, +ymin, (xmax - xmin), (ymax - ymin)); + + for (i = 0; i < r->nedges; i++) { + e = &r->edges[i]; + fprintf(fp ,"", e->x0,e->y0, e->x1,e->y1); + } + + for (i = 0; i < r->npoints; i++) { + if (i+1 < r->npoints) + fprintf(fp ,"", r->points[i].x, r->points[i].y, r->points[i+1].x, r->points[i+1].y); + fprintf(fp ,"", +r->points[i].x, r->points[i].y, r->points[i].flags == 0 ? "#f00" : "#0f0"); + } + + fprintf(fp, ""); + fclose(fp); +} +*/ + +void nsvgRasterizeText(NSVGrasterizer *r, const NSVGimage *font, float tx, float ty, float scale, + unsigned char *dst, int w, int h, int stride, const char *text) +{ + NSVGshape *shape = NULL; + NSVGedge *e = NULL; + NSVGcachedPaint cache; + NSVGshape **shapes = nsvgGetTextShapes(font, text, strlen(text)); + int i = 0, j = 0, textLen = strlen(text); + int fontHeight = (font->fontAscent - font->fontDescent) * scale; + int xStart = tx; + int charWidth = font->defaultHorizAdv * scale; + + // Hack because for some reason this has Y increase UP and we + // need to go DOWN every line + ty = ty + h - fontHeight; + + r->bitmap = dst; + r->width = w; + r->height = h; + r->stride = stride; + + if (w > r->cscanline) { + r->cscanline = w; + r->scanline = (unsigned char *)realloc(r->scanline, w); + if (r->scanline == NULL) { + return; + } + } + + for (i = 0; i < h; i++) { + memset(&dst[i * stride], 0, w * 4); + } + + for (i = 0; i < textLen; i++) { + if (text[i] == '\n') { + ty -= fontHeight; + // No clue why this is needed + tx = xStart - charWidth; + continue; + } + shape = shapes[i]; + if (!shape) { + if (text[i] == ' ') + tx += charWidth / 2.f; + continue; + } + if (!(shape->flags & NSVG_FLAGS_VISIBLE)) + continue; + + if (i == 0 && strcmp(shape->id, "OpenSansRegular") == 0) + tx = xStart - charWidth; + + if (shape->fill.type != NSVG_PAINT_NONE) { + nsvg__resetPool(r); + shape->fill.color = 0xffffffff; + r->freelist = NULL; + r->nedges = 0; + + nsvg__flattenShape(r, shape, scale); + + // Scale and translate edges + for (j = 0; j < r->nedges; j++) { + e = &r->edges[j]; + e->x0 = tx + e->x0; + e->y0 = (ty + e->y0) * NSVG__SUBSAMPLES; + e->x1 = tx + e->x1; + e->y1 = (ty + e->y1) * NSVG__SUBSAMPLES; + } + + // Rasterize edges + qsort(r->edges, r->nedges, sizeof(NSVGedge), nsvg__cmpEdge); + + // now, traverse the scanlines and find the intersections on each scanline, + // use non-zero rule + nsvg__initPaint(&cache, &shape->fill, shape->opacity); + + nsvg__rasterizeSortedEdges(r, tx, ty, scale, &cache, shape->fillRule); + } + if (shape->stroke.type != NSVG_PAINT_NONE && (shape->strokeWidth * scale) > 0.01f) { + nsvg__resetPool(r); + r->freelist = NULL; + r->nedges = 0; + + nsvg__flattenShapeStroke(r, shape, scale); + + // dumpEdges(r, "edge.svg"); + + // Scale and translate edges + for (j = 0; j < r->nedges; j++) { + e = &r->edges[j]; + e->x0 = tx + e->x0; + e->y0 = (ty + e->y0) * NSVG__SUBSAMPLES; + e->x1 = tx + e->x1; + e->y1 = (ty + e->y1) * NSVG__SUBSAMPLES; + } + + // Rasterize edges + qsort(r->edges, r->nedges, sizeof(NSVGedge), nsvg__cmpEdge); + + // now, traverse the scanlines and find the intersections on each scanline, + // use non-zero rule + nsvg__initPaint(&cache, &shape->stroke, shape->opacity); + + nsvg__rasterizeSortedEdges(r, tx, ty, scale, &cache, NSVG_FILLRULE_NONZERO); + } + tx += shape->horizAdvX * scale; + } + + nsvg__unpremultiplyAlpha(dst, w, h, stride); + + free(shapes); + + r->bitmap = NULL; + r->width = 0; + r->height = 0; + r->stride = 0; +} + +void nsvgRasterize(NSVGrasterizer *r, NSVGimage *image, float tx, float ty, float scale, + unsigned char *dst, int w, int h, int stride) +{ + NSVGshape *shape = NULL; + NSVGedge *e = NULL; + NSVGcachedPaint cache; + int i; + + r->bitmap = dst; + r->width = w; + r->height = h; + r->stride = stride; + + if (w > r->cscanline) { + r->cscanline = w; + r->scanline = (unsigned char *)realloc(r->scanline, w); + if (r->scanline == NULL) + return; + } + + for (i = 0; i < h; i++) + memset(&dst[i * stride], 0, w * 4); + + for (shape = image->shapes; shape != NULL; shape = shape->next) { + if (!(shape->flags & NSVG_FLAGS_VISIBLE)) + continue; + + if (shape->fill.type != NSVG_PAINT_NONE) { + nsvg__resetPool(r); + r->freelist = NULL; + r->nedges = 0; + + nsvg__flattenShape(r, shape, scale); + + // Scale and translate edges + for (i = 0; i < r->nedges; i++) { + e = &r->edges[i]; + e->x0 = tx + e->x0; + e->y0 = (ty + e->y0) * NSVG__SUBSAMPLES; + e->x1 = tx + e->x1; + e->y1 = (ty + e->y1) * NSVG__SUBSAMPLES; + } + + // Rasterize edges + qsort(r->edges, r->nedges, sizeof(NSVGedge), nsvg__cmpEdge); + + // now, traverse the scanlines and find the intersections on each scanline, + // use non-zero rule + nsvg__initPaint(&cache, &shape->fill, shape->opacity); + + nsvg__rasterizeSortedEdges(r, tx, ty, scale, &cache, shape->fillRule); + } + if (shape->stroke.type != NSVG_PAINT_NONE && (shape->strokeWidth * scale) > 0.01f) { + nsvg__resetPool(r); + r->freelist = NULL; + r->nedges = 0; + + nsvg__flattenShapeStroke(r, shape, scale); + + // dumpEdges(r, "edge.svg"); + + // Scale and translate edges + for (i = 0; i < r->nedges; i++) { + e = &r->edges[i]; + e->x0 = tx + e->x0; + e->y0 = (ty + e->y0) * NSVG__SUBSAMPLES; + e->x1 = tx + e->x1; + e->y1 = (ty + e->y1) * NSVG__SUBSAMPLES; + } + + // Rasterize edges + qsort(r->edges, r->nedges, sizeof(NSVGedge), nsvg__cmpEdge); + + // now, traverse the scanlines and find the intersections on each scanline, + // use non-zero rule + nsvg__initPaint(&cache, &shape->stroke, shape->opacity); + + nsvg__rasterizeSortedEdges(r, tx, ty, scale, &cache, NSVG_FILLRULE_NONZERO); + } + } + + nsvg__unpremultiplyAlpha(dst, w, h, stride); + + r->bitmap = NULL; + r->width = 0; + r->height = 0; + r->stride = 0; +} diff --git a/src/pbsplash.c b/src/pbsplash.c index e2b909c..0f32fe8 100644 --- a/src/pbsplash.c +++ b/src/pbsplash.c @@ -11,9 +11,7 @@ #include #include -#define NANOSVG_ALL_COLOR_KEYWORDS // Include full list of color keywords. #include "nanosvg.h" -#include "nanosvgrast.h" #include "pbsplash.h" #include "tfblib.h" #include "timespec.h"