зеркало из https://github.com/mozilla/gecko-dev.git
56 строки
2.4 KiB
HTML
56 строки
2.4 KiB
HTML
<!DOCTYPE HTML>
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<title>Canvas test: 2d.composite.canvas.xor</title>
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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 text = "I";
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var colorTop = 'rgba(255,0,0,1)';
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var colorBottom = 'rgba(0,255,0,1)';
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var inset = 10;
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var grad = ctx.createLinearGradient(inset, inset, inset, inset + 30);
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// add color stops
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grad.addColorStop(0, colorTop);
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grad.addColorStop(1, colorBottom);
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ctx.fillStyle = grad;
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ctx.textBaseline = 'top';
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ctx.font = '110px sans-serif'
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ctx.fillText(text, -10, -20);
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ctx.fillText(text, -8, -20);
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ctx.fillText(text, -6, -20);
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ctx.fillText(text, -4, -20);
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ctx.fillText(text, -2, -20);
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ctx.fillText(text, 0, -20);
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ctx.fillText(text, 2, -20);
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ctx.fillText(text, 4, -20);
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ctx.fillText(text, 6, -20);
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isPixel(ctx, 15,0, 255,0,0,255, "15,0", "255,0,0,255", 5);
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isPixel(ctx, 15,49, 0,255,0,255, "15,49", "0,255,0,255", 5);
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SimpleTest.finish();
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});
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</script>
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