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comparison: content/canvas/test/webgl-conformance/conformance/context/context-lost-restored.html
content/canvas/test/webgl-conformance/conformance/context/context-lost-restored.html
- changeset 2
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| -1:000000000000 | 0:a18ca6dafbca |
|---|---|
| 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 the context | |
| 68 shouldGenerateGLError(gl, gl.INVALID_OPERATION, "extension.restoreContext()"); | |
| 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.TEXTURE_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.TEXTURE_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.TEXTURE_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, "shouldBe " + 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 on 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> |
