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Verify that webgl2 is supported before using it (#3435)

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* Verify that webgl2 is supported before using it

* First check if WebGLRenderingContext exists at all

* Move webgl warnings to getTermOptions
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onecamp 2019-01-24 14:22:53 -05:00 committed by GitHub
parent 2828273424
commit fa2c9d6423
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1 changed files with 28 additions and 1 deletions
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29
lib/components/term.js
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@ -20,11 +20,38 @@ const CURSOR_STYLES = {
BLOCK: 'block'
};
const isWebgl2Supported = (() => {
let isSupported = window.WebGL2RenderingContext ? undefined : false;
return () => {
if (isSupported === undefined) {
const canvas = document.createElement('canvas');
const gl = canvas.getContext('webgl2', {depth: false, antialias: false});
isSupported = gl instanceof window.WebGL2RenderingContext;
}
return isSupported;
};
})();
const getTermOptions = props => {
// Set a background color only if it is opaque
const needTransparency = Color(props.backgroundColor).alpha() < 1;
const backgroundColor = needTransparency ? 'transparent' : props.backgroundColor;
const useWebGL = props.webGLRenderer && !needTransparency;
let useWebGL = false;
if (props.webGLRenderer) {
if (needTransparency) {
// eslint-disable-next-line no-console
console.warn(
'WebGL Renderer has been disabled since it does not support transparent backgrounds yet. ' +
'Falling back to canvas-based rendering.'
);
} else if (!isWebgl2Supported()) {
// eslint-disable-next-line no-console
console.warn('WebGL2 is not supported on your machine. Falling back to canvas-based rendering.');
} else {
useWebGL = true;
}
}
return {
macOptionIsMeta: props.modifierKeys.altIsMeta,
scrollback: props.scrollback,