Merge pull request #2972 from brendandahl/blend-mode-feature-test
Add feature test for blend mode.
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commit
f88c0e9ca1
@ -595,6 +595,34 @@ var tests = [
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},
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},
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impact: 'Important',
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impact: 'Important',
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area: 'Core'
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area: 'Core'
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},
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{
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id: 'Canvas Blend Mode',
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name: 'Canvas supports extended blend modes',
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run: function () {
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var fail = { output: 'Failed', emulated: 'No' };
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var ctx = document.createElement('canvas').getContext('2d');
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ctx.canvas.width = 1;
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ctx.canvas.height = 1;
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var mode = 'difference';
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ctx.globalCompositeOperation = mode;
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if (ctx.globalCompositeOperation !== mode) {
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return fail;
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}
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// Chrome supports setting the value, but it may not actually be
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// implemented, so we have to actually test the blend mode.
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ctx.fillStyle = 'red';
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ctx.fillRect(0, 0, 1, 1);
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ctx.fillStyle = 'blue';
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ctx.fillRect(0, 0, 1, 1);
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var pix = ctx.getImageData(0, 0, 1, 1).data;
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if (pix[0] !== 255 || pix[1] !== 0 || pix[2] !== 255) {
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return fail;
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}
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return { output: 'Success', emulated: '' };
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},
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impact: 'Important',
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area: 'Core'
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}
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}
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];
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];
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