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| 1 <!DOCTYPE html> |
| 2 <html> |
| 3 <head> |
| 4 <link rel="stylesheet" href="../../resources/js-test-style.css"/> |
| 5 <script src="../../resources/js-test-pre.js"></script> |
| 6 <script src="../resources/webgl-test.js"></script> |
| 7 <script src="../resources/webgl-test-utils.js"></script> |
| 8 <script> |
| 9 var wtu = WebGLTestUtils; |
| 10 var canvas; |
| 11 var gl; |
| 12 var shouldGenerateGLError; |
| 13 var extensionNames = [ |
| 14 "WEBKIT_WEBGL_lose_context", |
| 15 "MOZ_WEBGL_lose_context", |
| 16 ]; |
| 17 var extension; |
| 18 var bufferObjects; |
| 19 var program; |
| 20 var texture; |
| 21 var texColor = [255, 10, 20, 255]; |
| 22 var allowRestore; |
| 23 var contextLostEventFired; |
| 24 var contextRestoredEventFired; |
| 25 |
| 26 function init() |
| 27 { |
| 28 if (window.initNonKhronosFramework) { |
| 29 window.initNonKhronosFramework(true); |
| 30 } |
| 31 |
| 32 description("Tests behavior under a restored context."); |
| 33 |
| 34 shouldGenerateGLError = wtu.shouldGenerateGLError; |
| 35 testLosingContext(); |
| 36 } |
| 37 |
| 38 function setupTest() |
| 39 { |
| 40 canvas = document.createElement("canvas"); |
| 41 canvas.width = 1; |
| 42 canvas.height = 1; |
| 43 gl = wtu.create3DContext(canvas); |
| 44 for (var ii = 0; ii < extensionNames.length; ++ii) { |
| 45 extension = gl.getExtension(extensionNames[ii]); |
| 46 if (extension) |
| 47 break; |
| 48 } |
| 49 if (!extension) { |
| 50 debug("Could not find lose_context extension under the following names:
" + extensionNames.join(" ")); |
| 51 return false; |
| 52 } |
| 53 return true; |
| 54 } |
| 55 |
| 56 function testLosingContext() |
| 57 { |
| 58 if (!setupTest()) |
| 59 finishTest(); |
| 60 |
| 61 debug("Test losing a context and inability to restore it."); |
| 62 |
| 63 canvas.addEventListener("webglcontextlost", function(e) { |
| 64 testLostContext(e); |
| 65 // restore the context after this event has exited. |
| 66 setTimeout(function() { |
| 67 // we didn't call prevent default so we should not be able to restore t
he context |
| 68 shouldGenerateGLError(gl, gl.INVALID_OPERATION, "extension.restoreConte
xt()"); |
| 69 testLosingAndRestoringContext(); |
| 70 }, 0); |
| 71 }); |
| 72 canvas.addEventListener("webglcontextrestored", testShouldNotRestoreContext)
; |
| 73 allowRestore = false; |
| 74 contextLostEventFired = false; |
| 75 contextRestoredEventFired = false; |
| 76 |
| 77 testOriginalContext(); |
| 78 extension.loseContext(); |
| 79 // The context should be lost immediately. |
| 80 shouldBeTrue("gl.isContextLost()"); |
| 81 shouldBe("gl.getError()", "gl.CONTEXT_LOST_WEBGL"); |
| 82 shouldBe("gl.getError()", "gl.NO_ERROR"); |
| 83 // gl methods should be no-ops |
| 84 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.blendFunc(gl.TEXTURE_2D, gl.TEXTU
RE_CUBE_MAP)"); |
| 85 // but the event should not have been fired. |
| 86 shouldBeFalse("contextLostEventFired"); |
| 87 } |
| 88 |
| 89 function testLosingAndRestoringContext() |
| 90 { |
| 91 if (!setupTest()) |
| 92 finishTest(); |
| 93 |
| 94 debug(""); |
| 95 debug("Test losing and restoring a context."); |
| 96 |
| 97 canvas.addEventListener("webglcontextlost", function(e) { |
| 98 testLostContext(e); |
| 99 // restore the context after this event has exited. |
| 100 setTimeout(function() { |
| 101 shouldGenerateGLError(gl, gl.NO_ERROR, "extension.restoreContext()"); |
| 102 // The context should still be lost. It will not get restored until the |
| 103 // webglrestorecontext event is fired. |
| 104 shouldBeTrue("gl.isContextLost()"); |
| 105 shouldBe("gl.getError()", "gl.NO_ERROR"); |
| 106 // gl methods should still be no-ops |
| 107 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.blendFunc(gl.TEXTURE_2D, gl.T
EXTURE_CUBE_MAP)"); |
| 108 }, 0); |
| 109 }); |
| 110 canvas.addEventListener("webglcontextrestored", function() { |
| 111 testRestoredContext(); |
| 112 finishTest(); |
| 113 }); |
| 114 allowRestore = true; |
| 115 contextLostEventFired = false; |
| 116 contextRestoredEventFired = false; |
| 117 |
| 118 testOriginalContext(); |
| 119 extension.loseContext(); |
| 120 // The context should be lost immediately. |
| 121 shouldBeTrue("gl.isContextLost()"); |
| 122 shouldBe("gl.getError()", "gl.CONTEXT_LOST_WEBGL"); |
| 123 shouldBe("gl.getError()", "gl.NO_ERROR"); |
| 124 // gl methods should be no-ops |
| 125 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.blendFunc(gl.TEXTURE_2D, gl.TEXTU
RE_CUBE_MAP)"); |
| 126 // but the event should not have been fired. |
| 127 shouldBeFalse("contextLostEventFired"); |
| 128 } |
| 129 |
| 130 function testRendering() |
| 131 { |
| 132 gl.clearColor(0, 0, 0, 255); |
| 133 gl.colorMask(1, 1, 1, 0); |
| 134 gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT); |
| 135 |
| 136 program = wtu.setupSimpleTextureProgram(gl); |
| 137 bufferObjects = wtu.setupUnitQuad(gl); |
| 138 texture = wtu.createColoredTexture(gl, canvas.width, canvas.height, texColor
); |
| 139 |
| 140 gl.uniform1i(gl.getUniformLocation(program, "tex"), 0); |
| 141 wtu.drawQuad(gl, [0, 0, 0, 255]); |
| 142 |
| 143 var compare = texColor.slice(0, 3); |
| 144 wtu.checkCanvasRect(gl, 0, 0, canvas.width, canvas.height, compare, "shouldB
e " + compare); |
| 145 |
| 146 shouldBe("gl.getError()", "gl.NO_ERROR"); |
| 147 } |
| 148 |
| 149 function testOriginalContext() |
| 150 { |
| 151 debug("Test valid context"); |
| 152 shouldBeFalse("gl.isContextLost()"); |
| 153 shouldBe("gl.getError()", "gl.NO_ERROR"); |
| 154 testRendering(); |
| 155 debug(""); |
| 156 } |
| 157 |
| 158 function testLostContext(e) |
| 159 { |
| 160 debug("Test lost context"); |
| 161 shouldBeFalse("contextLostEventFired"); |
| 162 contextLostEventFired = true; |
| 163 shouldBeTrue("gl.isContextLost()"); |
| 164 shouldBe("gl.getError()", "gl.NO_ERROR"); |
| 165 debug(""); |
| 166 if (allowRestore) |
| 167 e.preventDefault(); |
| 168 } |
| 169 |
| 170 function testShouldNotRestoreContext(e) |
| 171 { |
| 172 testFailed("Should not restore the context unless preventDefault is called o
n the context lost event"); |
| 173 debug(""); |
| 174 } |
| 175 |
| 176 function testResources(expected) |
| 177 { |
| 178 var tests = [ |
| 179 "gl.bindTexture(gl.TEXTURE_2D, texture)", |
| 180 "gl.useProgram(program)", |
| 181 "gl.bindBuffer(gl.ARRAY_BUFFER, bufferObjects[0])", |
| 182 ]; |
| 183 |
| 184 for (var i = 0; i < tests.length; ++i) |
| 185 shouldGenerateGLError(gl, expected, tests[i]); |
| 186 } |
| 187 |
| 188 function testRestoredContext() |
| 189 { |
| 190 debug("Test restored context"); |
| 191 shouldBeFalse("contextRestoredEventFired"); |
| 192 contextRestoredEventFired = true; |
| 193 shouldBeFalse("gl.isContextLost()"); |
| 194 shouldBe("gl.getError()", "gl.NO_ERROR"); |
| 195 |
| 196 // Validate that using old resources fails. |
| 197 testResources(gl.INVALID_OPERATION); |
| 198 |
| 199 testRendering(); |
| 200 |
| 201 // Validate new resources created in testRendering(). |
| 202 testResources(gl.NO_ERROR); |
| 203 debug(""); |
| 204 } |
| 205 |
| 206 |
| 207 </script> |
| 208 </head> |
| 209 <body onload="init()"> |
| 210 <div id="description"></div> |
| 211 <div id="console"></div> |
| 212 </body> |
| 213 </html> |
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Chromium Code Reviews
Issue 9373009:
Check in webgl conformance tests r16844 from khronos. (Closed)
Base URL: svn://chrome-svn/chrome/trunk/deps/