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1 <!DOCTYPE HTML> |
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2 <title>Canvas test: 2d.composite.clip.lighter</title> |
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3 <!-- Testing: fill() does not affect pixels outside the clip region. --> |
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4 <script src="/tests/SimpleTest/SimpleTest.js"></script> |
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5 <link rel="stylesheet" href="/tests/SimpleTest/test.css"> |
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6 <body> |
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7 <canvas id="c" width="100" height="50"><p class="fallback">FAIL (fallback content)</p></canvas> |
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8 <script> |
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9 function isPixel(ctx, x,y, r,g,b,a, pos, colour, d) { |
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10 var pixel = ctx.getImageData(x, y, 1, 1); |
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11 var pr = pixel.data[0], |
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12 pg = pixel.data[1], |
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13 pb = pixel.data[2], |
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14 pa = pixel.data[3]; |
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15 ok(r-d <= pr && pr <= r+d && |
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16 g-d <= pg && pg <= g+d && |
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17 b-d <= pb && pb <= b+d && |
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18 a-d <= pa && pa <= a+d, |
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19 "pixel "+pos+" is "+pr+","+pg+","+pb+","+pa+"; expected "+colour+" +/- "+d); |
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20 } |
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21 |
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22 SimpleTest.waitForExplicitFinish(); |
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23 addLoadEvent(function () { |
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24 |
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25 var canvas = document.getElementById('c'); |
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26 var ctx = canvas.getContext('2d'); |
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27 |
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28 |
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29 ctx.fillStyle = '#0f0'; |
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30 ctx.fillRect(0, 0, 100, 50); |
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31 ctx.globalCompositeOperation = 'lighter'; |
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32 ctx.rect(-20, -20, 10, 10); |
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33 ctx.clip(); |
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34 ctx.fillStyle = '#f00'; |
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35 ctx.fillRect(0, 0, 50, 50); |
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36 isPixel(ctx, 25,25, 0,255,0,255, "25,25", "0,255,0,255", 0); |
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37 isPixel(ctx, 75,25, 0,255,0,255, "75,25", "0,255,0,255", 0); |
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38 |
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39 SimpleTest.finish(); |
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40 |
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41 }); |
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42 </script> |
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43 |