34909 2010-02-12 15:20:19 -0800 Need to create an OffscreenCanvas. 2011-02-09 15:32:16 -0800 1 1 1 Unclassified WebKit DOM 528+ (Nightly build) All All RESOLVED WONTFIX P2 Enhancement --- 35262 35322 35453 35615 35616 36906 41032 1 levin webkit-unassigned levin mdelaney7 oliver oldest_to_newest 190171 0 levin 2010-02-12 15:20:19 -0800 It should be usable in both Document and Worker context. To start with only 2D will be supported. (This is the umbrella bug for the feature -- where I'll mention the general approach, etc. I'll file other bugs for each step.) 192653 1 49243 levin 2010-02-22 15:00:49 -0800 Created attachment 49243 Proposed fix. 194283 2 levin 2010-02-26 14:10:45 -0800 Here's a basic outline of the work: 1. make HTMLCanvasElement derive from CanvsaSurface. 2. make CanvasRenderingContext2D only depend on CanvasSurface (in a future change) a. Move methods that CanvasRenderingContext2D depends on from HTMLCanvasElement to CanvasSurface. b. Change CanvasRenderingContext2D to only use CanvasSurface. 3. Create an OffscreenCanvas which derives from CanvasSurface. 4. Expose OffscreenCanvas for document context (with layout tests). 5. Expose OffscreenCanvas for the worker context (fix threadsafety issues, idl changes, layout tests, etc.). This result in allowing CanvasRenderingContext2D to be used with either HTMLCanvasElement or OffscreenCanvas. 245445 3 levin 2010-07-01 11:29:40 -0700 This work has been suspended for now (after various bits of feedback on whatwg regarding our target scenario of image resizing). Note that https://bugs.webkit.org/show_bug.cgi?id=41032 wasn't landed but may help in this effort if anyone pursues it. 49243 2010-02-22 15:00:49 -0800 2010-02-22 15:01:20 -0800 Proposed fix. bug34909.txt text/plain 1073 levin ZGlmZiAtLWdpdCBhL1dlYkNvcmUvQ2hhbmdlTG9nIGIvV2ViQ29yZS9DaGFuZ2VMb2cKaW5kZXgg NGRmYzZmNi4uMDE5OThhYiAxMDA2NDQKLS0tIGEvV2ViQ29yZS9DaGFuZ2VMb2cKKysrIGIvV2Vi Q29yZS9DaGFuZ2VMb2cKQEAgLTEsMyArMSwxNyBAQAorMjAxMC0wMi0wNSAgRGF2aWQgTGV2aW4g IDxsZXZpbkBjaHJvbWl1bS5vcmc+CisKKyAgICAgICAgUmV2aWV3ZWQgYnkgTk9CT0RZIChPT1BT ISkuCisKKyAgICAgICAgQ3JlYXRlIGEgY29weSBvZiB0aGUgSFRNTENhbnZhc0VsZW1lbnQgZmls ZXMuCisgICAgICAgIGh0dHBzOi8vYnVncy53ZWJraXQub3JnL3Nob3dfYnVnLmNnaT9pZD0zNTI2 MgorCisgICAgICAgIEFuIGluaXRpYWwgc3RlcCBpbiBtYWtpbmcgdGhlIE9mZnNjcmVlbkNhbnZh cyBvYmplY3QuCisKKyAgICAgICAgTm8gbmV3IGZ1bmN0aW9uYWxpdHkgc28gbm8gbmV3IHRlc3Rz LgorCisgICAgICAgICogZG9tL0NhbnZhc1N1cmZhY2UuY3BwOiBDb3BpZWQgZnJvbSBXZWJDb3Jl L2h0bWwvSFRNTENhbnZhc0VsZW1lbnQuY3BwLgorICAgICAgICAqIGRvbS9DYW52YXNTdXJmYWNl Lmg6IENvcGllZCBmcm9tIFdlYkNvcmUvaHRtbC9IVE1MQ2FudmFzRWxlbWVudC5oLgorCiAyMDEw LTAyLTA0ICBTdGVwaGVuIFdoaXRlICA8c2Vub3JibGFuY29AY2hyb21pdW0ub3JnPgogCiAgICAg ICAgIFVucmV2aWV3ZWQsIGJ1aWxkIGZpeC4KZGlmZiAtLWdpdCBhL1dlYkNvcmUvaHRtbC9IVE1M Q2FudmFzRWxlbWVudC5jcHAgYi9XZWJDb3JlL2RvbS9DYW52YXNTdXJmYWNlLmNwcApzaW1pbGFy aXR5IGluZGV4IDEwMCUKY29weSBmcm9tIFdlYkNvcmUvaHRtbC9IVE1MQ2FudmFzRWxlbWVudC5j cHAKY29weSB0byBXZWJDb3JlL2RvbS9DYW52YXNTdXJmYWNlLmNwcApkaWZmIC0tZ2l0IGEvV2Vi Q29yZS9odG1sL0hUTUxDYW52YXNFbGVtZW50LmggYi9XZWJDb3JlL2RvbS9DYW52YXNTdXJmYWNl LmgKc2ltaWxhcml0eSBpbmRleCAxMDAlCmNvcHkgZnJvbSBXZWJDb3JlL2h0bWwvSFRNTENhbnZh c0VsZW1lbnQuaApjb3B5IHRvIFdlYkNvcmUvZG9tL0NhbnZhc1N1cmZhY2UuaAo=