third_party/WebKit/LayoutTests/paint/invalidation/spv2/canvas-putImageData-expected.html

   1 <!-- Test for https://bugs.webkit.org/show_bug.cgi?id=46319 -->
   2 <head>
   3 </head>
   4 <body>
   5     <canvas id="canvas" width="100" height="100"></canvas>
   6     <script>
   7         var canvas = document.getElementById('canvas');
   8         var ctx = canvas.getContext('2d');
   9
  10         // prepare imagedata
  11         ctx.fillStyle = "rgb(255, 0, 0)"; ctx.fillRect(0, 0, 100, 100); // red background
  12         ctx.fillStyle = "rgb(0, 255, 0)"; ctx.fillRect(10, 10, 10, 10); // inset green square
  13         var imageDataGreen = ctx.getImageData(10, 10, 10, 10);
  14         var imageDataRedWithInsetGreen = ctx.getImageData(0, 0, 30, 30);
  15
  16         // clear canvas to dark green
  17         ctx.fillStyle = "rgb(0, 128, 0)";
  18         ctx.fillRect(0, 0, 100, 100);
  19
  20         // fill target locations with dark red
  21         ctx.fillStyle = "rgb(128, 0, 0)";
  22         ctx.fillRect(0, 0, 10, 10);
  23         ctx.fillRect(40, 40, 10, 10);
  24         ctx.fillRect(80, 80, 10, 10);
  25
  26         // patch up red squares with putImageData
  27         ctx.putImageData(imageDataGreen, 0, 0);
  28         ctx.putImageData(imageDataGreen, 40, 40);
  29         ctx.putImageData(imageDataRedWithInsetGreen, 70, 70, 10, 10, 10, 10);
  30     </script>
  31 </body>