third_party/WebKit/LayoutTests/fast/canvas/webgl/webgl-texture-binding-preserved.html

   1 <html>
   2 <head>
   3 <script src="../../../resources/js-test.js"></script>
   4 <script src="resources/webgl-test.js"></script>
   5 <script src="resources/webgl-test-utils.js"> </script>
   6 </head>
   7 <body>
   8 <div id="description"></div>
   9 <div id="console"></div>
  10 <script>
  11 description("Checks that painting WebGL contents doesn't pollute the context state.");
  12
  13 var wtu = WebGLTestUtils;
  14
  15 if (window.testRunner) {
  16     testRunner.dumpAsText();
  17     testRunner.waitUntilDone();
  18 }
  19
  20 if (window.internals)
  21     window.internals.settings.setWebGLErrorsToConsoleEnabled(false);
  22
  23 var canvas;
  24 var context;
  25
  26 function draw() {
  27   // Draw a blue quad to the screen.  The compositor should have executed
  28   // before reaching this point.  If the texture state was corrupted, then
  29   // a red quad will be drawn.  See crbug.com/105045.
  30   wtu.drawQuad(context);
  31
  32   wtu.checkCanvasRect(context, 0, 0, 1, 1, [0, 0, 255, 255], "Should have rendered blue.", 1);
  33   if (window.testRunner)
  34     testRunner.notifyDone();
  35 }
  36
  37 window.onload = function()
  38 {
  39   if (window.initNonKhronosFramework) {
  40     window.initNonKhronosFramework(false);
  41   }
  42
  43   canvas = document.getElementById("webgl-canvas");
  44   context = create3DContext(canvas);
  45
  46   var program = wtu.setupTexturedQuad(context);
  47   var bufferObjects = wtu.setupUnitQuad(context);
  48   var texture = wtu.createColoredTexture(context, 1, 1, [0, 0, 255, 255]);
  49
  50   context.uniform1i(context.getUniformLocation(program, "tex"), 0);
  51
  52   context.activeTexture(context.TEXTURE_0 + 5);
  53   context.bindTexture(context.TEXTURE_2D, texture);
  54
  55   context.viewport(0, 0, canvas.width, canvas.height);
  56
  57   context.clearColor(255, 0, 0, 255);
  58   context.clear(context.COLOR_BUFFER_BIT | context.DEPTH_BUFFER_BIT);
  59
  60   // We need to ensure that the compositor has run before the drawing
  61   // takes place.  requestAnimationFrame was tried for this purpose,
  62   // but it did not produce the failing behaviour in crbug.com/105045.
  63   // A timeout of 100 ms was found to consistently reproduce the problem.
  64   setTimeout(draw, 100);
  65 }
  66 </script>
  67 <canvas id="webgl-canvas" width="32px" height="32px"></canvas>
  68 </body>
  69 </html>