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

   1 <!-- Based on fast/repaint/canvas-putImageData.html -->
   2 <!-- Test for https://bugs.webkit.org/show_bug.cgi?id=46319 -->
   3 <head>
   4     <script src="resources/paint-invalidation-test.js"></script>
   5 </head>
   6 <body>
   7     <canvas id="canvas" width="100" height="100"></canvas>
   8     <script>
   9         var canvas = document.getElementById('canvas');
  10         var ctx = canvas.getContext('2d');
  11
  12         // prepare imagedata
  13         ctx.fillStyle = "rgb(255, 0, 0)"; ctx.fillRect(0, 0, 100, 100); // red background
  14         ctx.fillStyle = "rgb(0, 255, 0)"; ctx.fillRect(10, 10, 10, 10); // inset green square
  15         var imageDataGreen = ctx.getImageData(10, 10, 10, 10);
  16         var imageDataRedWithInsetGreen = ctx.getImageData(0, 0, 30, 30);
  17
  18         // clear canvas to dark green
  19         ctx.fillStyle = "rgb(0, 128, 0)";
  20         ctx.fillRect(0, 0, 100, 100);
  21
  22         // fill target locations with dark red
  23         ctx.fillStyle = "rgb(128, 0, 0)";
  24         ctx.fillRect(0, 0, 10, 10);
  25         ctx.fillRect(40, 40, 10, 10);
  26         ctx.fillRect(80, 80, 10, 10);
  27         window.testIsAsync = true;
  28
  29         window.expectedPaintInvalidationObjects = [
  30             "LayoutHTMLCanvas CANVAS id='canvas'",
  31         ];
  32         function paintInvalidationTest()
  33         {
  34             // patch up red squares with putImageData
  35             ctx.putImageData(imageDataGreen, 0, 0);
  36             ctx.putImageData(imageDataGreen, 40, 40);
  37             ctx.putImageData(imageDataRedWithInsetGreen, 70, 70, 10, 10, 10, 10);
  38             // Because canvas invalidations are processed at the end of the current task,
  39             // the repaint test has to end in a subsequent task in order to capture the repaint.
  40             setTimeout(finishPaintInvalidationTest, 0);
  41         }
  42
  43         window.onload = runPaintInvalidationTest;
  44     </script>
  45 </body>