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| 1 <!-- |
| 2 Copyright (c) 2011 The Chromium Authors. All rights reserved. |
| 3 Use of this source code is governed by a BSD-style license that can be |
| 4 found in the LICENSE file. |
| 5 --> |
| 6 <!DOCTYPE html> |
| 7 <html> |
| 8 <head> |
| 9 <meta charset="utf-8"> |
| 10 <link rel="stylesheet" href="../../resources/js-test-style.css"/> |
| 11 <script src="../../resources/js-test-pre.js"></script> |
| 12 <script src="../resources/webgl-test.js"></script> |
| 13 <script src="../resources/webgl-test-utils.js"></script> |
| 14 </head> |
| 15 <body> |
| 16 <canvas id="testbed" width="400" height="400" style="width: 40px; height: 40px;"
></canvas> |
| 17 <div id="description"></div> |
| 18 <div id="console"></div> |
| 19 <script> |
| 20 var wtu = WebGLTestUtils; |
| 21 description('Verify renderbuffers are initialized to 0 before being read in WebG
L'); |
| 22 |
| 23 var canvas = document.getElementById("testbed"); |
| 24 var gl = create3DContext(canvas); |
| 25 if (!gl) { |
| 26 testFailed('canvas.getContext() failed'); |
| 27 } else { |
| 28 // Set the clear color to green. It should never show up. |
| 29 gl.clearColor(0, 1, 0, 1); |
| 30 |
| 31 runTest(gl, canvas.width, canvas.height, 0); |
| 32 runTest(gl, canvas.width, canvas.height, 1); |
| 33 runTest(gl, canvas.width, canvas.height, 0); |
| 34 runTest(gl, canvas.width, canvas.height, 1); |
| 35 |
| 36 // Testing buffer clearing won't change the clear values. |
| 37 var clearColor = gl.getParameter(gl.COLOR_CLEAR_VALUE); |
| 38 shouldBe("clearColor", "[0, 1, 0, 1]"); |
| 39 glErrorShouldBe(gl, gl.NO_ERROR, 'should be no errors'); |
| 40 } |
| 41 |
| 42 function runTest(gl, width, height, order) |
| 43 { |
| 44 wtu.checkCanvasRect(gl, 0, 0, width, height, [0,0,0,0], |
| 45 "internal buffers have been initialized to 0"); |
| 46 |
| 47 // fill the back buffer so we know that reading below happens from |
| 48 // the renderbuffer. |
| 49 gl.clear(gl.COLOR_BUFFER_BIT); |
| 50 |
| 51 var fbo = gl.createFramebuffer(); |
| 52 gl.bindFramebuffer(gl.FRAMEBUFFER, fbo); |
| 53 var colorbuffer = gl.createRenderbuffer(); |
| 54 gl.bindRenderbuffer(gl.RENDERBUFFER, colorbuffer); |
| 55 switch (order) { |
| 56 case 0: |
| 57 allocStorage(width, height); |
| 58 attachBuffer(colorbuffer); |
| 59 break; |
| 60 case 1: |
| 61 attachBuffer(colorbuffer); |
| 62 allocStorage(width, height); |
| 63 break; |
| 64 } |
| 65 |
| 66 function allocStorage(width, height) { |
| 67 gl.renderbufferStorage(gl.RENDERBUFFER, gl.RGBA4, width, height); |
| 68 glErrorShouldBe(gl, gl.NO_ERROR, 'should be no error after renderbuffe
rStorage(internalformat = RGBA4).'); |
| 69 } |
| 70 |
| 71 function attachBuffer(colorbuffer) { |
| 72 gl.framebufferRenderbuffer(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.RENDER
BUFFER, colorbuffer); |
| 73 } |
| 74 |
| 75 if (gl.checkFramebufferStatus(gl.FRAMEBUFFER) != gl.FRAMEBUFFER_COMPLETE) { |
| 76 testFailed('Framebuffer incomplete.'); |
| 77 return; |
| 78 } |
| 79 |
| 80 wtu.checkCanvasRect(gl, 0, 0, width, height, [0,0,0,0], |
| 81 "user buffers have been initialized to 0"); |
| 82 |
| 83 gl.deleteFramebuffer(fbo); |
| 84 gl.deleteRenderbuffer(colorbuffer); |
| 85 |
| 86 // this clear should not matter we are about to resize |
| 87 gl.clear(gl.COLOR_BUFFER_BIT); |
| 88 |
| 89 canvas.width += 1; |
| 90 canvas.height += 1; |
| 91 |
| 92 debug(''); |
| 93 } |
| 94 |
| 95 successfullyParsed = true; |
| 96 </script> |
| 97 <script src="../../resources/js-test-post.js"></script> |
| 98 </body> |
| 99 </html> |
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Chromium Code Reviews
Issue 8342021:
Add webgl conformance tests r15841. (Closed)
Base URL: svn://chrome-svn/chrome/trunk/deps/third_party/webgl/sdk/tests/