зеркало из https://github.com/mozilla/gecko-dev.git
46 строки
1.4 KiB
HTML
46 строки
1.4 KiB
HTML
<!DOCTYPE HTML>
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<title>Canvas test: 2d.composite.canvas.xor</title>
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<script src="/MochiKit/MochiKit.js"></script>
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<script src="/tests/SimpleTest/SimpleTest.js"></script>
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<link rel="stylesheet" href="/tests/SimpleTest/test.css">
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<body>
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<canvas id="c" width="100" height="50"><p class="fallback">FAIL (fallback content)</p></canvas>
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<script>
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function isPixel(ctx, x,y, r,g,b,a, pos, colour, d) {
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var pixel = ctx.getImageData(x, y, 1, 1);
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var pr = pixel.data[0],
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pg = pixel.data[1],
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pb = pixel.data[2],
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pa = pixel.data[3];
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ok(r-d <= pr && pr <= r+d &&
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g-d <= pg && pg <= g+d &&
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b-d <= pb && pb <= b+d &&
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a-d <= pa && pa <= a+d,
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"pixel "+pos+" is "+pr+","+pg+","+pb+","+pa+"; expected "+colour+" +/- "+d);
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}
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SimpleTest.waitForExplicitFinish();
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addLoadEvent(function () {
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var canvas = document.getElementById('c');
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var ctx = canvas.getContext('2d');
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var canvas2 = document.createElement('canvas');
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canvas2.width = canvas.width;
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canvas2.height = canvas.height;
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var ctx2 = canvas2.getContext('2d');
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ctx2.drawImage(document.getElementById('yellow75.png'), 0, 0);
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ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
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ctx.fillRect(0, 0, 100, 50);
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ctx.globalCompositeOperation = 'screen';
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ctx.drawImage(canvas2, 0, 0);
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isPixel(ctx, 50,25, 218,255,146,223, "50,25", "218,255,146,223", 5);
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SimpleTest.finish();
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});
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</script>
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<img src="image_yellow75.png" id="yellow75.png" class="resource">
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