The Tor Browser: content/canvas/test/webgl-conformance/extra/fbo-lost-context.html@6474c204b198 (annotated)

content/canvas/test/webgl-conformance/extra/fbo-lost-context.html@6474c204b198 (annotated)

content/canvas/test/webgl-conformance/extra/fbo-lost-context.html

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 <!--
 Copyright (c) 2009 The Chromium Authors. All rights reserved.
 Use of this source code is governed by a BSD-style license that can be
 found in the LICENSE file.
  -->
 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
   "http://www.w3.org/TR/html4/loose.dtd">
 <html>
 <head>
 <meta charset="utf-8">
 <title>WebGL FBO Lost Context Test</title>
 <link rel="stylesheet" href="../resources/js-test-style.css"/>
 <script src="../resources/desktop-gl-constants.js" type="text/javascript"></script>
 <script src="../../debug/webgl-debug.js"></script>
 <script src="../resources/js-test-pre.js"></script>
 <script src="../conformance/resources/webgl-test.js"></script>
 </head>
 <body>
 <div id="description"></div>
 <div id="console"></div>
 <script id="vshader" type="x-shader/x-vertex">
 attribute vec4 vPosition;
 attribute vec2 texCoord0;
 uniform mat4 world;
 varying vec2 texCoord;
 void main()
 {
     gl_Position = vPosition * world;
     texCoord = texCoord0;
 }
 </script>
 <script id="fshader" type="x-shader/x-fragment">
 precision mediump float;
 uniform sampler2D tex;
 varying vec2 texCoord;
 void main()
 {
     gl_FragColor = texture2D(tex, texCoord);
 }
 </script>
 <canvas id="canvas" width="1024" height="1024"> </canvas>
 <script>
 description("This test is to help see if an WebGL app *can* get lost context.");
 debug("");
 debug("Canvas.getContext");
 var g_worldLoc;
 var g_texLoc;
 var g_textures = [];
 gl = initWebGL("canvas", "vshader", "fshader", [ "vPosition", "texCoord0"], [ 0, 0, 0, 1 ], 1);
 if (!gl) {
   testFailed("context does not exist");
 } else {
   testPassed("context exists");
   debug("");
   debug("Checking for out of memory handling.");
   var size = gl.getParameter(gl.MAX_RENDERBUFFER_SIZE);
   debug("max render buffer size: " + size);
   size = size / 2;
   debug("size used: " + size);
   var allocateFramebuffers = true;
   var itervalId;
   var count = 0;
   gl = WebGLDebugUtils.makeDebugContext(gl, function(err, functionName, args) {
         window.clearInterval(intervalId);
         assertMsg(err == gl.OUT_OF_MEMORY,
                   "correctly returns gl.OUT_OF_MEMORY when out of memory");
         finish();
       });
   function createFBO() {
     var tex = gl.createTexture();
     gl.bindTexture(gl.TEXTURE_2D, tex);
     gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR);
     gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR);
     gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
     gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
     gl.texImage2D(gl.TEXTURE_2D,
 ,                 // level
                   gl.RGBA,           // internalFormat
                   size,              // width
                   size,              // height
 ,                 // border
                   gl.RGBA,           // format
                   gl.UNSIGNED_BYTE,  // type
                   null);             // data
     var fb = gl.createFramebuffer();
     gl.bindFramebuffer(gl.FRAMEBUFFER, fb);
     gl.framebufferTexture2D(
         gl.FRAMEBUFFER,
         gl.COLOR_ATTACHMENT0,
         gl.TEXTURE_2D,
         tex,
 );
     var status = gl.checkFramebufferStatus(gl.FRAMEBUFFER);
     if (status != gl.FRAMEBUFFER_COMPLETE) {
       testFailed("gl.checkFramebufferStatus() returned " + WebGLDebugUtils.glEnumToString(status));
     }
     return { fb: fb, tex: tex };
   }
   gl.disable(gl.DEPTH_TEST);
   var numFBOs = 32;
   for (var ii = 0; ii < numFBOs; ++ii) {
     createFBO();
     var t = createFBO();
     tex = t.tex;
     fb = t.fb;
     gl.bindFramebuffer(gl.FRAMEBUFFER, fb);
     gl.scissor(0, 0, size, size);
     gl.clearColor(0, ii / numFBOs, 1 - ii / numFBOs, 1);
     gl.clear(gl.COLOR_BUFFER_BIT);
     g_textures.push(tex);
   }
   gl.bindFramebuffer(gl.FRAMEBUFFER, null);
   var vertexObject = gl.createBuffer();
   gl.bindBuffer(gl.ARRAY_BUFFER, vertexObject);
   gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([
      -1,1,0, 1,1,0, -1,-1,0,
      -1,-1,0, 1,1,0, 1,-1,0
    ]), gl.STATIC_DRAW);
   gl.enableVertexAttribArray(0);
   gl.vertexAttribPointer(0, 3, gl.FLOAT, false, 0, 0);
   var vertexObject = gl.createBuffer();
   gl.bindBuffer(gl.ARRAY_BUFFER, vertexObject);
   gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([
 ,0, 1,0, 0,1,
 ,1, 1,0, 1,1
    ]), gl.STATIC_DRAW);
   gl.enableVertexAttribArray(1);
   gl.vertexAttribPointer(1, 2, gl.FLOAT, false, 0, 0);
   gl.bindTexture(gl.TEXTURE_2D, tex);
   g_texLoc = gl.getUniformLocation(gl.program, "tex");
   gl.uniform1i(g_texLoc, 0);
   g_worldLoc = gl.getUniformLocation(gl.program, "world");
   gl.uniformMatrix4fv(g_worldLoc, false, [
 , 0, 0, 0,
 , 0, 0, 0,
 , 0, 1, 0,
 , 0, 0, 1]);
   gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
   gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
   gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR);
   setInterval(render, 1000/60);
 }
 var g_angle = 0;
 var g_texIndex = 0;
 function render() {
   g_angle += 0.1;
   g_texIndex++;
   if (g_texIndex >= g_textures.length) {
     g_texIndex = 0;
   }
   gl.bindTexture(gl.TEXTURE_2D, g_textures[g_texIndex]);
   gl.uniformMatrix4fv(g_worldLoc, false, rotationZ(g_angle));
   gl.clearColor(1,0,0,1);
   gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
   gl.drawArrays(gl.TRIANGLES, 0, 6);
 }
 /**
  * Creates a 4-by-4 matrix which rotates around the z-axis by the given angle.
  * @param {number} angle The angle by which to rotate (in radians).
  * @return {!o3djs.math.Matrix4} The rotation matrix.
  */
 function rotationZ(angle) {
   var c = Math.cos(angle);
   var s = Math.sin(angle);
   return [
     c, s, 0, 0,
     -s, c, 0, 0,
 , 0, 1, 0,
 , 0, 0, 1
   ];
 };
 debug("");
 successfullyParsed = true;
 </script>
 <script>
 </script>
 </body>
 </html>

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content/canvas/test/webgl-conformance/extra/fbo-lost-context.html@6474c204b198 (annotated)

content/canvas/test/webgl-conformance/extra/fbo-lost-context.html