230886 2021-09-28 02:45:52 -0700 [GPU Process] REGRESSION: Drawing a large SVG image on a canvas may take too much memory 2022-02-07 15:30:16 -0800 1 1 1 Unclassified WebKit Canvas Other iPhone / iPad Other RESOLVED FIXED https://bugs.webkit.org/show_bug.cgi?id=227748 https://codepen.io/Ziriax/full/LYLgYxp InRadar P2 Major --- 1 kaput.sts sabouhallawa dino ews-watchlist fmalita gsnedders gyuyoung.kim pdr roman.n sabouhallawa schenney sergio simon.fraser wart.claes webkit-bug-importer oldest_to_newest 1797801 0 kaput.sts 2021-09-28 02:45:52 -0700 It seems that when downscaling a HTML canvas by factor F, and drawing an image with SVG source, upscaled by factor F, iOS 15 Safari crashes when F is large enough, even though these two factors should cancel out (1/F * F = 1). I think it will draw the SVG to an intermediate texture F times the size of the SVG, in this case (F*1000)^2 pixels => kaboom. This is a regression because it works on all other browsers, and works fine in iOS 13 and 14 Safari. To reproduce, visit https://codepen.io/Ziriax/full/LYLgYxp 1797805 1 kaput.sts 2021-09-28 02:50:04 -0700 It seems Safari TP on OSX also crashes 1797917 2 gsnedders 2021-09-28 09:31:15 -0700 GPU process, maybe? 1797944 3 webkit-bug-importer 2021-09-28 10:20:39 -0700 <rdar://problem/83628607> 1798514 4 ap 2021-09-29 13:12:57 -0700 I cannot reproduce this on macOS 12 beta with Safari 15.1 on Apple Silicon, nor with STP 132, for what it's worth. 1798840 5 gsnedders 2021-09-30 05:00:12 -0700 I can see vastly higher memory usage on macOS 12 beta with Safari 15.1 on Intel and vastly worse performance than Firefox Nightly or Chrome Canary. On the whole my assumption is the crash is "simply" OOM. I'd presume that Firefox and Chrome are cancelling out the factors and therefore they don't actually do anything. 1798924 6 simon.fraser 2021-09-30 10:12:13 -0700 GPU Process forced us to draw SVGs into an image buffer and then draw that to the canvas. That's probably the cause of the regression. 1800024 7 kaput.sts 2021-10-04 04:15:38 -0700 I see, that was what I expected. So some extra logic should be added to compute the minimal size of such an intermediate texture. If the world canvas transform is known, and the dimensions of the canvas, that is not too difficult IMHO? 1807920 8 442208 sabouhallawa 2021-10-22 15:58:42 -0700 Created attachment 442208 Simple test case (Should show a green rectangle) 1807930 9 442212 sabouhallawa 2021-10-22 16:09:26 -0700 Created attachment 442212 Patch 1808027 10 ews-feeder 2021-10-22 21:07:19 -0700 Committed r284740 (243449@main): <https://commits.webkit.org/243449@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 442212. 1811259 11 sabouhallawa 2021-11-02 14:05:47 -0700 *** Bug 231796 has been marked as a duplicate of this bug. *** 1813122 12 roman.n 2021-11-09 06:24:57 -0800 Could you tip when it will be in the new safari version? 1815096 13 gsnedders 2021-11-15 09:36:07 -0800 (In reply to Roman Nikitin from comment #12) > Could you tip when it will be in the new safari version? Apple does not comment on future releases. 442208 2021-10-22 15:58:42 -0700 2021-10-22 15:58:42 -0700 Simple test case (Should show a green rectangle) canvas-draw-large-svg-image.html text/html 874 sabouhallawa PGJvZHk+CiAgICA8Y2FudmFzIGlkPSJjYW52YXMiIHdpZHRoPSIxMDAiIGhlaWdodD0iMTAwIj4K ICAgIDxzY3JpcHQ+CiAgICAgICAgY29uc3QgY2FudmFzID0gZG9jdW1lbnQuZ2V0RWxlbWVudEJ5 SWQoImNhbnZhcyIpOwogICAgICAgIGNvbnN0IGN0eCA9IGNhbnZhcy5nZXRDb250ZXh0KCIyZCIp OwoKICAgICAgICBjb25zdCB7IHdpZHRoLCBoZWlnaHQgfSA9IGNhbnZhczsKICAgICAgICBjdHgu ZmlsbFN0eWxlID0gInJlZCI7CiAgICAgICAgY3R4LmZpbGxSZWN0KDAsIDAsIHdpZHRoLCBoZWln aHQpOwoKICAgICAgICBmdW5jdGlvbiBkcmF3SW1hZ2UoaW1hZ2UsIHNjYWxlKSB7CiAgICAgICAg ICAgIGN0eC5zYXZlKCk7CgogICAgICAgICAgICBjdHguc2NhbGUoMSAvIHNjYWxlLCAxIC8gc2Nh bGUpOwogICAgICAgICAgICBjdHguZHJhd0ltYWdlKGltYWdlLCAwLCAwLCAxMDAwLCAxMDAwLCAw LCAwLCB3aWR0aCAqIHNjYWxlLCBoZWlnaHQgKiBzY2FsZSk7CgogICAgICAgICAgICBjdHgucmVz dG9yZSgpOwogICAgICAgIH0KCiAgICAgICAgY29uc3QgaW1hZ2UgPSBuZXcgSW1hZ2UoKTsKICAg 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