94961 2012-08-24 11:27:08 -0700 WebGL should not flip textures on presentation if contents are unchanged 2012-08-27 15:42:04 -0700 1 1 1 Unclassified WebKit New Bugs 528+ (Nightly build) Unspecified Unspecified RESOLVED FIXED P2 Normal --- 1 jamesr jamesr abarth cc-bugs cmarrin danakj dino dpranke enne jbauman kbr ojan piman webkit.review.bot zlieber zmo oldest_to_newest 704271 0 jamesr 2012-08-24 11:27:08 -0700 WebGL should not flip textures on presentation if contents are unchanged 704280 1 160461 jamesr 2012-08-24 11:33:48 -0700 Created attachment 160461 Patch 704281 2 jamesr 2012-08-24 11:34:48 -0700 The bug is chromium-specific (afaik) but the fix touches cross-platform code, so I haven't marked this with [chromium]. I think this could also be solved in a chromium-specific way that doesn't touch DrawingBuffer at all but this seems to me like something DrawingBuffer should be able to handle. 704526 3 160461 kbr 2012-08-24 17:01:23 -0700 Comment on attachment 160461 Patch The fix looks good as far as I can see. Some additional test cases to try would include printing of WebGL content, the other WebGL layout tests, and various demos on the web. r=me 704613 4 jamesr 2012-08-24 18:53:31 -0700 (In reply to comment #3) > (From update of attachment 160461 [details]) > The fix looks good as far as I can see. Some additional test cases to try would include printing of WebGL content, the other WebGL layout tests, and various demos on the web. r=me Thanks for the review. I'll check these locally before landing - our automated testing of things like webgl printing hasn't been too reliable in the past. Is there a way to force AA off for local testing other than code modification, by any chance? 705709 5 kbr 2012-08-27 14:55:07 -0700 (In reply to comment #4) > (In reply to comment #3) > > (From update of attachment 160461 [details] [details]) > > The fix looks good as far as I can see. Some additional test cases to try would include printing of WebGL content, the other WebGL layout tests, and various demos on the web. r=me > > Thanks for the review. I'll check these locally before landing - our automated testing of things like webgl printing hasn't been too reliable in the past. Is there a way to force AA off for local testing other than code modification, by any chance? zmo added the command line option --disable-gl-multisampling a while back; I think it should still work. 705776 6 jamesr 2012-08-27 15:35:00 -0700 Printing appears to be broken with or without this patch - after printing the WebGL content is cleared. I don't know how long this has been broken. Most pages / demos repaint the canvas on every frame so this problem is transient. Filed https://bugs.webkit.org/show_bug.cgi?id=95140 to cover that bug. I don't think this patch makes anything worse. 705786 7 kbr 2012-08-27 15:38:35 -0700 (In reply to comment #6) > Printing appears to be broken with or without this patch - after printing the WebGL content is cleared. I don't know how long this has been broken. Most pages / demos repaint the canvas on every frame so this problem is transient. Filed https://bugs.webkit.org/show_bug.cgi?id=95140 to cover that bug. I don't think this patch makes anything worse. Darn it. Thanks for testing anyway. Please go ahead with your patch. 705790 8 jamesr 2012-08-27 15:42:04 -0700 Committed r126810: <http://trac.webkit.org/changeset/126810> 160461 2012-08-24 11:33:48 -0700 2012-08-24 17:01:23 -0700 Patch bug-94961-20120824113344.patch text/plain 9435 jamesr U3VidmVyc2lvbiBSZXZpc2lvbjogMTI2NTE3CmRpZmYgLS1naXQgYS9Tb3VyY2UvV2ViQ29yZS9D aGFuZ2VMb2cgYi9Tb3VyY2UvV2ViQ29yZS9DaGFuZ2VMb2cKaW5kZXggM2ZlZDBkZWNiNjc3ZTFl OWRiMDUzZDcxMWZhMTQxMjM5ZDlhOWI0NC4uODNiZWY4YjBjMmZhNWIyODljMjQxN2Q5MTlmNGYw MjI4YjI4ZjAzMCAxMDA2NDQKLS0tIGEvU291cmNlL1dlYkNvcmUvQ2hhbmdlTG9nCisrKyBiL1Nv dXJjZS9XZWJDb3JlL0NoYW5nZUxvZwpAQCAtMSwzICsxLDI3IEBACisyMDEyLTA4LTI0ICBKYW1l cyBSb2JpbnNvbiAgPGphbWVzckBjaHJvbWl1bS5vcmc+CisKKyAgICAgICAgV2ViR0wgc2hvdWxk IG5vdCBmbGlwIHRleHR1cmVzIG9uIHByZXNlbnRhdGlvbiBpZiBjb250ZW50cyBhcmUgdW5jaGFu Z2VkCisgICAgICAgIGh0dHBzOi8vYnVncy53ZWJraXQub3JnL3Nob3dfYnVnLmNnaT9pZD05NDk2 MQorCisgICAgICAgIFJldmlld2VkIGJ5IE5PQk9EWSAoT09QUyEpLgorCisgICAgICAgIEZvciBX 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