зеркало из https://github.com/mozilla/gecko-dev.git
44 строки
1.4 KiB
HTML
44 строки
1.4 KiB
HTML
<!DOCTYPE HTML>
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<title>Canvas test: 2d.gradient.interpolate.alpha</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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MochiKit.DOM.addLoadEvent(function () {
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var canvas = document.getElementById('c');
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var ctx = canvas.getContext('2d');
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ctx.fillStyle = '#ff0';
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ctx.fillRect(0, 0, 100, 50);
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var g = ctx.createLinearGradient(0, 0, 100, 0);
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g.addColorStop(0, 'rgba(0,0,255, 0)');
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g.addColorStop(1, 'rgba(0,0,255, 1)');
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ctx.fillStyle = g;
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ctx.fillRect(0, 0, 100, 50);
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isPixel(ctx, 25,25, 191,191,63,255, "25,25", "191,191,63,255", 3);
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isPixel(ctx, 50,25, 127,127,127,255, "50,25", "127,127,127,255", 3);
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isPixel(ctx, 75,25, 63,63,191,255, "75,25", "63,63,191,255", 3);
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SimpleTest.finish();
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});
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</script>
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