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| (Empty) | |
| 1 <!DOCTYPE html> |
| 2 <html> |
| 3 <body> |
| 4 <canvas id="example" width="50" height="50"> |
| 5 </canvas> |
| 6 <div id="description"></div> |
| 7 <div id="console"></div> |
| 8 <script src="../../../resources/js-test.js"></script> |
| 9 <script src="resources/webgl-test.js"></script> |
| 10 <script src="resources/webgl-test-utils.js"></script> |
| 11 <script> |
| 12 "use strict"; |
| 13 var wtu = WebGLTestUtils; |
| 14 description("toDataURL() causes side effect for framebuffer binding. crbug.com/4
45848"); |
| 15 |
| 16 function test() { |
| 17 var glCanvas = document.getElementById("example"); |
| 18 // crbug.com/445848 bug occurs only on the following webgl configuration. |
| 19 var gl = wtu.create3DContext(glCanvas, {preserveDrawingBuffer: true, premultip
liedAlpha: true}); |
| 20 // FIXME: context.getContextAttributes().antialias is always false on |
| 21 // content shell with --dump-render-tree option. See http://crbug.com/375682 |
| 22 // If antialias is supported, test can be much shorter for crbug.com/445848. |
| 23 |
| 24 var program = wtu.setupColorQuad(gl); |
| 25 |
| 26 // Clear backbuffer in red. |
| 27 gl.clearColor(1.0, 0.0, 0.0, 1.0); |
| 28 gl.clear(gl.COLOR_BUFFER_BIT); |
| 29 wtu.checkCanvas(gl, [255, 0, 0, 255], "should be red"); |
| 30 |
| 31 var fbo = gl.createFramebuffer(); |
| 32 var tex = gl.createTexture(); |
| 33 gl.bindTexture(gl.TEXTURE_2D, tex); |
| 34 gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, 50, 50, 0, gl.RGBA, gl.UNSIGNED_BYTE,
null); |
| 35 gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST); |
| 36 gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST); |
| 37 gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE); |
| 38 gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE); |
| 39 gl.bindFramebuffer(gl.FRAMEBUFFER, fbo); |
| 40 gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, t
ex, 0); |
| 41 if (gl.checkFramebufferStatus(gl.FRAMEBUFFER) != gl.FRAMEBUFFER_COMPLETE) { |
| 42 finishTest(); |
| 43 return; |
| 44 } |
| 45 |
| 46 // Clear the FBO in green. |
| 47 gl.clearColor(0.0, 1.0, 0.0, 1.0); |
| 48 gl.clear(gl.COLOR_BUFFER_BIT); |
| 49 |
| 50 // backbuffer is still in red. |
| 51 gl.bindFramebuffer(gl.FRAMEBUFFER, null); |
| 52 wtu.checkCanvas(gl, [255, 0, 0, 255], "should be red"); |
| 53 gl.bindFramebuffer(gl.FRAMEBUFFER, fbo); |
| 54 |
| 55 glCanvas.toDataURL(); |
| 56 // The second toDataURL binds backbuffer in crbug.com/445848 |
| 57 glCanvas.toDataURL(); |
| 58 // It applies to backbuffer, not the FBO. |
| 59 gl.clear(gl.COLOR_BUFFER_BIT); |
| 60 |
| 61 // backbuffer must be in red, not green. |
| 62 gl.bindFramebuffer(gl.FRAMEBUFFER, null); |
| 63 wtu.checkCanvas(gl, [255, 0, 0, 255], "should be red"); |
| 64 |
| 65 finishTest(); |
| 66 } |
| 67 test(); |
| 68 |
| 69 var successfullyParsed = true; |
| 70 </script> |
| 71 </body> |
| 72 </html> |
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Chromium Code Reviews
Issue 805273005:
WebGL: paintRenderingResultsToImageData() must restore FBO. (Closed)
Base URL: https://chromium.googlesource.com/chromium/blink.git@master