third_party/WebKit/LayoutTests/fast/repaint/canvas-putImageData.html

   1 <!-- Test for https://bugs.webkit.org/show_bug.cgi?id=46319 -->
   2 <head>
   3     <script src="resources/text-based-repaint.js"></script>
   4 </head>
   5 <body>
   6     <canvas id="canvas" width="100" height="100"></canvas>
   7     <script>
   8         var canvas = document.getElementById('canvas');
   9         var ctx = canvas.getContext('2d');
  10
  11         // prepare imagedata
  12         ctx.fillStyle = "rgb(255, 0, 0)"; ctx.fillRect(0, 0, 100, 100); // red background
  13         ctx.fillStyle = "rgb(0, 255, 0)"; ctx.fillRect(10, 10, 10, 10); // inset green square
  14         var imageDataGreen = ctx.getImageData(10, 10, 10, 10);
  15         var imageDataRedWithInsetGreen = ctx.getImageData(0, 0, 30, 30);
  16
  17         // clear canvas to dark green
  18         ctx.fillStyle = "rgb(0, 128, 0)";
  19         ctx.fillRect(0, 0, 100, 100);
  20
  21         // fill target locations with dark red
  22         ctx.fillStyle = "rgb(128, 0, 0)";
  23         ctx.fillRect(0, 0, 10, 10);
  24         ctx.fillRect(40, 40, 10, 10);
  25         ctx.fillRect(80, 80, 10, 10);
  26         window.testIsAsync = true;
  27
  28         function repaintTest()
  29         {
  30             // patch up red squares with putImageData
  31             ctx.putImageData(imageDataGreen, 0, 0);
  32             ctx.putImageData(imageDataGreen, 40, 40);
  33             ctx.putImageData(imageDataRedWithInsetGreen, 70, 70, 10, 10, 10, 10);
  34             // Because canvas invalidations are processed at the end of the current task,
  35             // the repaint test has to end in a subsequent task in order to capture the repaint.
  36             setTimeout(finishRepaintTest, 0);
  37         }
  38
  39         window.onload = runRepaintTest;
  40     </script>
  41 </body>