2008-08-10 21:01:14 -07:00
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<!DOCTYPE HTML>
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<title>Canvas test: 2d.composite.uncovered.image.destination-atop</title>
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<!-- Testing: drawImage() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged. -->
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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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function todo_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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todo(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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2011-08-12 09:21:37 -07:00
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addLoadEvent(function () {
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2008-08-10 21:01:14 -07:00
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var canvas = document.getElementById('c');
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var ctx = canvas.getContext('2d');
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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 = 'destination-atop';
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ctx.drawImage(document.getElementById('yellow.png'), 40, 40, 10, 10, 40, 50, 10, 10)
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2008-11-06 01:44:13 -08:00
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isPixel(ctx, 15,15, 0,0,0,0, "15,15", "0,0,0,0", 5);
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isPixel(ctx, 50,25, 0,0,0,0, "50,25", "0,0,0,0", 5);
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2008-08-10 21:01:14 -07:00
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SimpleTest.finish();
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});
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</script>
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<img src="image_yellow.png" id="yellow.png" class="resource">
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