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51 lines
1.5 KiB
HTML
51 lines
1.5 KiB
HTML
<!DOCTYPE HTML>
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<title>Canvas test: 2d.imageData.get.unaffected</title>
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<!-- Testing: getImageData() is not affected by context state -->
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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 = '#0f0';
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ctx.fillRect(0, 0, 50, 50)
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ctx.fillStyle = '#f00';
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ctx.fillRect(50, 0, 50, 50)
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ctx.save();
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ctx.translate(50, 0);
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ctx.globalAlpha = 0.1;
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ctx.globalCompositeOperation = 'destination-atop';
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ctx.shadowColor = '#f00';
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ctx.rect(0, 0, 5, 5);
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ctx.clip();
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var imgdata = ctx.getImageData(0, 0, 50, 50);
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ctx.restore();
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ctx.putImageData(imgdata, 50, 0);
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isPixel(ctx, 25,25, 0,255,0,255, "25,25", "0,255,0,255", 2);
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isPixel(ctx, 75,25, 0,255,0,255, "75,25", "0,255,0,255", 2);
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SimpleTest.finish();
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});
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</script>
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