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64 lines
2.3 KiB
HTML
64 lines
2.3 KiB
HTML
<!DOCTYPE HTML>
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<title>Canvas test: 2d.transformation.transform.skewed</title>
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<!-- Testing: transform() with skewy matrix transforms correctly -->
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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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// Create green with a red square ring inside it
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ctx.fillStyle = '#0f0';
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ctx.fillRect(0, 0, 100, 50);
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ctx.fillStyle = '#f00';
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ctx.fillRect(20, 10, 60, 30);
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ctx.fillStyle = '#0f0';
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ctx.fillRect(40, 20, 20, 10);
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// Draw a skewed shape to fill that gap, to make sure it is aligned correctly
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ctx.transform(1,4, 2,3, 5,6);
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// Post-transform coordinates:
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// [[20,10],[80,10],[80,40],[20,40],[20,10],[40,20],[40,30],[60,30],[60,20],[40,20],[20,10]];
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// Hence pre-transform coordinates:
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var pts=[[-7.4,11.2],[-43.4,59.2],[-31.4,53.2],[4.6,5.2],[-7.4,11.2],
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[-15.4,25.2],[-11.4,23.2],[-23.4,39.2],[-27.4,41.2],[-15.4,25.2],
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[-7.4,11.2]];
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ctx.beginPath();
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ctx.moveTo(pts[0][0], pts[0][1]);
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for (var i = 0; i < pts.length; ++i)
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ctx.lineTo(pts[i][0], pts[i][1]);
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ctx.fill();
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isPixel(ctx, 21,11, 0,255,0,255, "21,11", "0,255,0,255", 0);
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isPixel(ctx, 79,11, 0,255,0,255, "79,11", "0,255,0,255", 0);
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isPixel(ctx, 21,39, 0,255,0,255, "21,39", "0,255,0,255", 0);
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isPixel(ctx, 79,39, 0,255,0,255, "79,39", "0,255,0,255", 0);
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isPixel(ctx, 39,19, 0,255,0,255, "39,19", "0,255,0,255", 0);
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isPixel(ctx, 61,19, 0,255,0,255, "61,19", "0,255,0,255", 0);
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isPixel(ctx, 39,31, 0,255,0,255, "39,31", "0,255,0,255", 0);
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isPixel(ctx, 61,31, 0,255,0,255, "61,31", "0,255,0,255", 0);
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SimpleTest.finish();
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});
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</script>
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