The Tor Browser: content/canvas/test/webgl-conformance/conformance/textures/gl-pixelstorei.html@8bccb770b82d (annotated)

content/canvas/test/webgl-conformance/conformance/textures/gl-pixelstorei.html@8bccb770b82d (annotated)

content/canvas/test/webgl-conformance/conformance/textures/gl-pixelstorei.html

Wed, 31 Dec 2014 13:27:57 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 13:27:57 +0100
branch: TOR_BUG_3246
changeset 6: 8bccb770b82d
permissions: -rw-r--r--

Ignore runtime configuration files generated during quality assurance.

 <!--
 Copyright (c) 2011 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>
 <html>
 <head>
 <meta charset="utf-8">
 <title>WebGL pixelStorei Test</title>
 <link rel="stylesheet" href="../../resources/js-test-style.css"/>
 <script src="../../resources/js-test-pre.js"></script>
 <script src="../resources/webgl-test.js"> </script>
 <script src="../../resources/desktop-gl-constants.js" type="text/javascript"></script>
 </head>
 <body>
 <canvas id="example" width="50" height="50"></canvas>
 <canvas id="2d00" width="50" height="50"></canvas>
 <canvas id="2d01" width="50" height="50"></canvas>
 <canvas id="2d02" width="50" height="50"></canvas>
 <canvas id="2d03" width="50" height="50"></canvas>
 <div id="description"></div>
 <div id="console"></div>
 <script id="vshader" type="x-shader/x-vertex">
 attribute vec4 vPosition;
 void main() {
   gl_Position = vPosition;
 }
 </script>
 <script id="fshader" type="x-shader/x-fragment">
 void main() {
   gl_FragColor = vec4(1.0,0.0,0.0,1.0);
 }
 </script>
 <script>
 function fail(x,y, name, buf, shouldBe) {
   var i = (y*50+x) * 4;
   var reason = "pixel in "+name+" at ("+x+","+y+") is ("+buf[i]+","+buf[i+1]+","+buf[i+2]+","+buf[i+3]+"), should be "+shouldBe;
   testFailed(reason);
 }
 function pass(name) {
   testPassed("drawing is correct in " + name);
 }
 function init() {
   description("This test checks that drawImage and readPixels are not effected by gl.Pixelstorei(gl.PACK_ALIGNMENT) and visa versa");
   debug("There should be 5 red triangles on 5 black squares above");
   debug("");
   var canvas3d = document.getElementById("example");
   gl = initWebGL("example", "vshader", "fshader", [ "vPosition"], [ 0, 0, 0, 1 ], 1);
   var vertexObject = gl.createBuffer();
   gl.bindBuffer(gl.ARRAY_BUFFER, vertexObject);
   gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([ 0,0.5,0, -0.5,-0.5,0, 0.5,-0.5,0 ]), gl.STATIC_DRAW);
   gl.enableVertexAttribArray(0);
   gl.vertexAttribPointer(0, 3, gl.FLOAT, false, 0, 0);
   gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
   gl.drawArrays(gl.TRIANGLES, 0, 3);
   function checkData(buf, name) {
     // Test several locations
     // First line should be all black
     for (var i = 0; i < 50; ++i) {
       if (buf[i*4] != 0 || buf[i*4+1] != 0 || buf[i*4+2] != 0 || buf[i*4+3] != 255) {
         fail(i, 0, name, buf, "(0,0,0,255)");
         return;
       }
     }
     // Line 25 should be red for at least 6 red pixels starting 22 pixels in
     var offset = (25*50+22) * 4;
     for (var i = 0; i < 6; ++i) {
       if (buf[offset+i*4] != 255 || buf[offset+i*4+1] != 0 || buf[offset+i*4+2] != 0 || buf[offset+i*4+3] != 255) {
         fail(22 + i, 25, name, buf, "(255,0,0,255)");
         return;
       }
     }
     // Last line should be all black
     offset = (49*50) * 4;
     for (var i = 0; i < 50; ++i) {
       if (buf[offset+i*4] != 0 || buf[offset+i*4+1] != 0 || buf[offset+i*4+2] != 0 || buf[offset+i*4+3] != 255) {
         fail(i, 49, name, buf, "(0,0,0,255)");
         return;
       }
     }
     pass(name);
   }
   function checkColors() {
     var buf = new Uint8Array(50 * 50 * 4);
     gl.readPixels(0, 0, 50, 50, gl.RGBA, gl.UNSIGNED_BYTE, buf);
     checkData(buf, "3d context");
     var imgData = ctx2d.getImageData(0, 0, 50, 50);
     checkData(imgData.data, "2d context");
   }
   var table = [1, 2, 4, 8];
   for (var ii = 0; ii < table.length; ++ii) {
     gl.pixelStorei(gl.PACK_ALIGNMENT, table[ii]);
     ctx2d = document.getElementById("2d0" + ii).getContext("2d");
     ctx2d.globalCompositeOperation = 'copy';
     ctx2d.drawImage(canvas3d, 0, 0);
     checkColors();
     assertMsg(gl.getParameter(gl.PACK_ALIGNMENT) == table[ii],
         "PACK_ALIGNMENT is " + table[ii]);
   }
 }
 init();
 successfullyParsed = true;
 </script>
 <script>finishTest();</script>
 </body>
 </html>

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content/canvas/test/webgl-conformance/conformance/textures/gl-pixelstorei.html