225873 2021-05-17 08:47:29 -0700 Drawing an sRGB image into a DisplayP3 canvas and then into sRGB canvas yields different results than if you only draw it into the sRGB canvas 2021-08-11 10:11:50 -0700 1 1 1 Unclassified WebKit Canvas Other Unspecified Unspecified RESOLVED MOVED InRadar P2 Normal --- 1 sam webkit-unassigned dino heycam simon.fraser webkit-bug-importer oldest_to_newest 1760755 0 sam 2021-05-17 08:47:29 -0700 Drawing an sRGB image into a DisplayP3 canvas and then into sRGB canvas yields different results than if you only draw it into the sRGB canvas. 1760756 1 428832 sam 2021-05-17 08:48:59 -0700 Created attachment 428832 Test case where both are drawn and tested 1760757 2 428833 sam 2021-05-17 08:49:27 -0700 Created attachment 428833 Test case where only the sRGB canvas is drawn into 1760758 3 sam 2021-05-17 08:50:31 -0700 NOTE: This requires ToT WebKit with the CanvasColorSpacesEnabled feature enabled. 1760759 4 sam 2021-05-17 08:52:29 -0700 This seems to be related to some cache, as to see the results, you must open a new window for each test case, otherwise, the tests will taint each other. 1760761 5 sam 2021-05-17 08:55:14 -0700 It also seems to have to do with canvas accelerated graphics as disabling that (via the Debug -> Drawing and Compositing Flags, etc.) causes the issue to go away. 1760765 6 428834 sam 2021-05-17 09:06:26 -0700 Created attachment 428834 Visual Test (all three squares should be the same color) 1760875 7 428866 sam 2021-05-17 14:02:08 -0700 Created attachment 428866 Visual Test (all three squares should be the same color) 1760876 8 sam 2021-05-17 14:03:01 -0700 Updated the visual test case, the getImageData() was not necessary. Now to uncover all the different image caches in WebKit to see which one is acting up. 1763149 9 webkit-bug-importer 2021-05-24 08:48:16 -0700 <rdar://problem/78402035> 1776652 10 433411 sam 2021-07-13 09:42:06 -0700 Created attachment 433411 Visual Test (only the sRGB ones) 1783395 11 heycam 2021-08-10 22:20:16 -0700 This is being tracked internally. 1783544 12 sam 2021-08-11 10:11:50 -0700 👍 428832 2021-05-17 08:48:59 -0700 2021-05-17 08:48:59 -0700 Test case where both are drawn and tested canvas-color-space-display-p3-drawImage-both.html text/html 2495 sam PCFET0NUWVBFIGh0bWw+CjxodG1sPgo8aGVhZD4KPC9oZWFkPgo8Ym9keT4KPHByZSBpZD0ibG9n Ij48L3ByZT4KPGltZyBpZD0icmVkLXBuZy1zcmdiIiB3aWR0aD0iNTAiIGhlaWdodD0iNTAiIHNy Yz0iZGF0YTppbWFnZS9wbmc7YmFzZTY0LGlWQk9SdzBLR2dvQUFBQU5TVWhFVWdBQUFHUUFBQUJr Q0FZQUFBQnc0cFZVQUFBQUFYTlNSMElBcnM0YzZRQUFBRkJsV0VsbVRVMEFLZ0FBQUFnQUFnRVNB QU1BQUFBQkFBRUFBSWRwQUFRQUFBQUJBQUFBSmdBQUFBQUFBNkFCQUFNQUFBQUJBQUVBQUtBQ0FB 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