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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 <title>WebGL Canvas Conformance Tests</title> |
| 11 <link rel="stylesheet" href="../../resources/js-test-style.css"/> |
| 12 <script src="../../resources/desktop-gl-constants.js" type="text/javascript"></s
cript> |
| 13 <script src="../../resources/js-test-pre.js"></script> |
| 14 <script src="../resources/webgl-test.js"></script> |
| 15 </head> |
| 16 <body> |
| 17 <div id="description"></div> |
| 18 <div id="console"></div> |
| 19 <canvas id="canvas" style="width: 50px; height: 50px;"> </canvas> |
| 20 <canvas id="canvas2d" width="40" height="40"> </canvas> |
| 21 <script> |
| 22 if (window.initNonKhronosFramework) { |
| 23 window.initNonKhronosFramework(true); |
| 24 } |
| 25 |
| 26 description("This test ensures WebGL implementations interact correctly with the
canvas tag."); |
| 27 |
| 28 debug(""); |
| 29 debug("Canvas.getContext"); |
| 30 |
| 31 var err; |
| 32 var canvas = document.getElementById("canvas"); |
| 33 var canvas2d = document.getElementById("canvas2d"); |
| 34 var ctx2d = canvas2d.getContext("2d"); |
| 35 var gl = create3DContext(canvas); |
| 36 if (!gl) { |
| 37 testFailed("context does not exist"); |
| 38 } else { |
| 39 testPassed("context exists"); |
| 40 |
| 41 debug(""); |
| 42 debug("Checking canvas and WebGL interaction"); |
| 43 |
| 44 // Check that a canvas with no width or height is 300x150 pixels |
| 45 shouldBe('canvas.width', '300'); |
| 46 shouldBe('canvas.height', '150'); |
| 47 |
| 48 // Check get a 4 value gl parameter as a csv string. |
| 49 function getValue4v(name) { |
| 50 var v = gl.getParameter(name); |
| 51 var result = '' + |
| 52 v[0] + ',' + |
| 53 v[1] + ',' + |
| 54 v[2] + ',' + |
| 55 v[3]; |
| 56 return result; |
| 57 } |
| 58 |
| 59 function getViewport() { |
| 60 return getValue4v(gl.VIEWPORT); |
| 61 } |
| 62 |
| 63 function getClearColor() { |
| 64 return getValue4v(gl.COLOR_CLEAR_VALUE); |
| 65 } |
| 66 |
| 67 function isAboutEqual(a, b) { |
| 68 return Math.abs(a - b) < 0.01; |
| 69 } |
| 70 |
| 71 function isAboutEqualInt(a, b) { |
| 72 return Math.abs(a - b) < 3; |
| 73 } |
| 74 |
| 75 function checkCanvasContentIs(r3d,g3d,b3d,a3d) { |
| 76 var r2d; |
| 77 var g2d; |
| 78 var b2d; |
| 79 var a2d; |
| 80 |
| 81 function checkPixel(x, y, r3d,g3d,b3d,a3d) { |
| 82 var offset = (y * 40 + x) * 4; |
| 83 r2d = imgData.data[offset]; |
| 84 g2d = imgData.data[offset + 1]; |
| 85 b2d = imgData.data[offset + 2]; |
| 86 a2d = imgData.data[offset + 3]; |
| 87 //debug('' + x + ', ' + y + "(" + offset + ") = " + r2d + ", " + g2d + ",
" + b2d + ", " + a2d); |
| 88 return isAboutEqualInt(r2d, r3d) && |
| 89 isAboutEqualInt(g2d, g3d) && |
| 90 isAboutEqualInt(b2d, b3d) && |
| 91 isAboutEqualInt(a2d, a3d); |
| 92 } |
| 93 |
| 94 function checkPixels(r3d,g3d,b3d,a3d) { |
| 95 return checkPixel(0, 0, r3d, g3d, b3d, a3d) && |
| 96 checkPixel(0, 39, r3d, g3d, b3d, a3d) && |
| 97 checkPixel(39, 0, r3d, g3d, b3d, a3d) && |
| 98 checkPixel(39, 39, r3d, g3d, b3d, a3d) && |
| 99 checkPixel(0, 0, r3d, g3d, b3d, a3d); |
| 100 }; |
| 101 |
| 102 // Set to just take the color from the 3d canvas |
| 103 ctx2d.globalCompositeOperation = 'copy'; |
| 104 |
| 105 // fill 2d canvas with orange |
| 106 ctx2d.fillStyle = "rgb(255,192,128)"; |
| 107 ctx2d.fillRect (0, 0, 40, 40); |
| 108 |
| 109 // get the image data |
| 110 var imgData = ctx2d.getImageData(0, 0, 40, 40); |
| 111 |
| 112 // check it got cleared. |
| 113 if (!checkPixels(255, 192, 128, 255)) { |
| 114 testFailed("unable to fill 2d context."); |
| 115 return; |
| 116 } |
| 117 |
| 118 // draw 3d canvas on top. |
| 119 ctx2d.drawImage(canvas, 0,0, 40, 40); |
| 120 |
| 121 // get the image data |
| 122 var imgData = ctx2d.getImageData(0, 0, 40, 40); |
| 123 |
| 124 // Check it's the expected color. |
| 125 if (!checkPixels(r3d, g3d, b3d, a3d)) { |
| 126 testFailed("pixels are " + r2d + "," + g2d + "," + b2d + "," + a2d + |
| 127 " expected " + r3d + "," + g3d + "," + b3d + "," + a3d); |
| 128 } else { |
| 129 testPassed("pixels are " + r3d + "," + g3d + "," + b3d + "," + a3d); |
| 130 } |
| 131 } |
| 132 |
| 133 checkCanvasContentIs(0, 0, 0, 0); |
| 134 shouldBe('getViewport()', '"0,0,300,150"'); |
| 135 |
| 136 // Change the display size of the canvas and check |
| 137 // the viewport size does not change. |
| 138 debug(""); |
| 139 debug("change display size of canvas and see that viewport does not change"); |
| 140 canvas.style.width = "100px"; |
| 141 canvas.style.height = "25px"; |
| 142 var intervalId; |
| 143 intervalId = window.setInterval(function() { |
| 144 if (canvas.clientWidth == 100 && |
| 145 canvas.clientHeight == 25) { |
| 146 window.clearInterval(intervalId); |
| 147 shouldBe('getViewport()', '"0,0,300,150"'); |
| 148 shouldBe('canvas.width', '300'); |
| 149 shouldBe('canvas.height', '150'); |
| 150 |
| 151 // Change the actual size of the canvas |
| 152 // Check that the viewport does not change. |
| 153 // Check that the clear color does not change. |
| 154 // Check that the color mask does not change. |
| 155 debug(""); |
| 156 debug("change the actual size of the canvas and see that the viewport does
not change"); |
| 157 gl.clearColor(0.25, 0.5, 0.75, 1); |
| 158 gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT); |
| 159 checkCanvasContentIs(64, 128, 192, 255); |
| 160 gl.colorMask(0,0,0,0); |
| 161 glErrorShouldBe(gl, gl.NO_ERROR, "No GL errors before resizing the canvas"
); |
| 162 canvas.width = 400; |
| 163 canvas.height = 10; |
| 164 err = gl.getError(); |
| 165 // Some implementations might lost the context when resizing |
| 166 if (err != gl.CONTEXT_LOST_WEBGL) { |
| 167 shouldBe("err", "gl.NO_ERROR"); |
| 168 var v = gl.getParameter(gl.COLOR_CLEAR_VALUE); |
| 169 assertMsg(isAboutEqual(v[0], 0.25) && |
| 170 isAboutEqual(v[1], 0.5) && |
| 171 isAboutEqual(v[2], 0.75) && |
| 172 isAboutEqual(v[3], 1), |
| 173 "gl.clearColor should not change after canvas resize"); |
| 174 v = gl.getParameter(gl.COLOR_WRITEMASK); |
| 175 assertMsg(isAboutEqual(v[0], 0) && |
| 176 isAboutEqual(v[1], 0) && |
| 177 isAboutEqual(v[2], 0) && |
| 178 isAboutEqual(v[3], 0), |
| 179 "gl.colorMask should not change after canvas resize"); |
| 180 shouldBe('getViewport()', '"0,0,300,150"'); |
| 181 checkCanvasContentIs(0, 0, 0, 0); |
| 182 } |
| 183 |
| 184 debug(""); |
| 185 finishTest(); |
| 186 } |
| 187 }, 1000/30); |
| 188 } |
| 189 </script> |
| 190 |
| 191 </body> |
| 192 </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/