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| 1 <html> | |
| 2 <head> | |
| 3 <script src="../../../resources/js-test.js"></script> | |
| 4 <script src="resources/webgl-test.js"></script> | |
| 5 <script> | |
| 6 function runTest(gl, width, height) | |
| 7 { | |
| 8 | |
| 9 debug('Test whether the WebGL internal buffers have been initialized to 0.')
; | |
| 10 var totalBytes = width * height * 4; | |
| 11 var buf = new Uint8Array(totalBytes); | |
| 12 gl.readPixels(0, 0, width, height, gl.RGBA, gl.UNSIGNED_BYTE, buf); | |
| 13 if (gl.getError() != gl.NO_ERROR) { | |
| 14 testFailed('GL error detected after readPixels().'); | |
| 15 return false; | |
| 16 } | |
| 17 for (var i = 0; i < totalBytes; ++i) { | |
| 18 if (buf[i] != 0) { | |
| 19 testFailed('WebGL internal buffers are dirty.'); | |
| 20 return false; | |
| 21 } | |
| 22 } | |
| 23 testPassed('Buffers have been initialized to 0.'); | |
| 24 | |
| 25 debug('Test whether user created buffers have been initialized to 0.'); | |
| 26 var fbo = gl.createFramebuffer(); | |
| 27 gl.bindFramebuffer(gl.FRAMEBUFFER, fbo); | |
| 28 var colorbuffer = gl.createRenderbuffer(); | |
| 29 gl.bindRenderbuffer(gl.RENDERBUFFER, colorbuffer); | |
| 30 gl.renderbufferStorage(gl.RENDERBUFFER, gl.RGBA4, width, height); | |
| 31 if (gl.getError() != gl.NO_ERROR) { | |
| 32 testFailed('GL error detected after renderbufferStorage(internalformat =
RGBA4).'); | |
| 33 return false; | |
| 34 } | |
| 35 gl.framebufferRenderbuffer(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.RENDERBU
FFER, colorbuffer); | |
| 36 if (gl.checkFramebufferStatus(gl.FRAMEBUFFER) != gl.FRAMEBUFFER_COMPLETE) { | |
| 37 testFailed('Framebuffer incomplete.'); | |
| 38 return false; | |
| 39 } | |
| 40 gl.readPixels(0, 0, width, height, gl.RGBA, gl.UNSIGNED_BYTE, buf); | |
| 41 if (gl.getError() != gl.NO_ERROR) { | |
| 42 testFailed('GL error detected after readPixels().'); | |
| 43 return false; | |
| 44 } | |
| 45 for (var i = 0; i < totalBytes; ++i) { | |
| 46 if (buf[i] != 0) { | |
| 47 testFailed('User created buffers are dirty.'); | |
| 48 return false; | |
| 49 } | |
| 50 } | |
| 51 | |
| 52 testPassed('Buffers have been initialized to 0.'); | |
| 53 return true; | |
| 54 } | |
| 55 </script> | |
| 56 </head> | |
| 57 <body> | |
| 58 <canvas id="testbed" width="400px" height="400px"></canvas> | |
| 59 <div id="description"></div> | |
| 60 <div id="console"></div> | |
| 61 <script> | |
| 62 | |
| 63 description('Verify renderbuffers are initialized to 0 before being read in WebG
L'); | |
| 64 | |
| 65 var canvas = document.getElementById("testbed"); | |
| 66 var gl = canvas.getContext("webgl"); | |
| 67 if (gl) { | |
| 68 runTest(gl, canvas.width, canvas.height); | |
| 69 | |
| 70 // Testing that canvas resizing will clear the buffers with 0 instead of the
current clear values. | |
| 71 gl.clearColor(1, 0, 0, 1); | |
| 72 canvas.width += 1; | |
| 73 canvas.height += 1; | |
| 74 runTest(gl, canvas.width, canvas.height); | |
| 75 | |
| 76 // Testing buffer clearing won't change the clear values. | |
| 77 var clearColor = gl.getParameter(gl.COLOR_CLEAR_VALUE); | |
| 78 shouldBe("clearColor", "[1, 0, 0, 1]"); | |
| 79 } else | |
| 80 testFailed('canvas.getContext() failed'); | |
| 81 </script> | |
| 82 </body> | |
| 83 </html> | |
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Chromium Code Reviews
Issue 1601093008:
Remove duplicated WebGL layout tests. (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master