227550 2021-06-30 15:43:51 -0700 [GPU Process] Draw PDFs using an intermediate ImageBuffer when using the GPU process 2021-07-08 13:28:54 -0700 1 1 1 Unclassified WebKit New Bugs WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED https://bugs.webkit.org/show_bug.cgi?id=227519 InRadar P2 Normal --- 1 mmaxfield mmaxfield dino jonlee sabouhallawa simon.fraser thorton webkit-bug-importer oldest_to_newest 1773911 0 mmaxfield 2021-06-30 15:43:51 -0700 [GPU Process] Temporarily disable drawing large PDFs in display list drawing 1773913 1 432635 mmaxfield 2021-06-30 15:48:46 -0700 Created attachment 432635 Patch 1773914 2 webkit-bug-importer 2021-06-30 15:49:12 -0700 <rdar://problem/79989738> 1773929 3 432635 simon.fraser 2021-06-30 16:18:35 -0700 Comment on attachment 432635 Patch This will break some page, somewhere. Can we do something like draw at a lower resolution? 1775120 4 432982 mmaxfield 2021-07-06 15:26:39 -0700 Created attachment 432982 Patch 1775730 5 432982 thorton 2021-07-08 11:22:15 -0700 Comment on attachment 432982 Patch View in context: https://bugs.webkit.org/attachment.cgi?id=432982&action=review > Source/WebCore/platform/graphics/cg/PDFDocumentImage.cpp:165 > + // FIXME: Surely there needs to be a clip operation here, if the srcRect is smaller than the whole PDF. BUG # > Source/WebCore/platform/graphics/cg/PDFDocumentImage.cpp:251 > + // FIXME: Passing in m_cachedImageRect.location() for the source rect position is confusing here. BUG # (also, "confusing" or "wrong"? I thought you had a test page that indicated the latter, which also should go in the BUG!) > Source/WebCore/platform/graphics/cg/PDFDocumentImage.cpp:286 > + // We also need to be careful about not getting jetsam'ed. I would expand "jetsam'ed" out to "terminated due to memory pressure" or something. 1775752 6 mmaxfield 2021-07-08 12:11:15 -0700 Committed r279741 (239522@main): <https://commits.webkit.org/239522@main> 1775756 7 432982 sabouhallawa 2021-07-08 12:27:08 -0700 Comment on attachment 432982 Patch View in context: https://bugs.webkit.org/attachment.cgi?id=432982&action=review >> Source/WebCore/platform/graphics/cg/PDFDocumentImage.cpp:165 >> + // FIXME: Surely there needs to be a clip operation here, if the srcRect is smaller than the whole PDF. > > BUG # I do not think this comment is correct. The clipping has to be on context to dstRect regardless we are drawing the whole PDF or not. I think also the clipping is the responsibility of the caller, i.e. the render elements. BitmapImage::draw() does not clip either. > Source/WebCore/platform/graphics/cg/PDFDocumentImage.cpp:291 > + auto scalar = std::min(1.f, std::sqrt(static_cast<float>(s_maxCachedImageArea) / (dstRect.width() * dstRect.height()))); Can dstRect.width() or dstRect.height() be zero? > LayoutTests/fast/images/pdf-in-canvas-expected.html:12 > + <div style="position: absolute; left: -3px; top: 97px; width: 106px; height: 6px; background: green;"></div Missing closing angle bracket. > LayoutTests/fast/images/pdf-in-canvas.html:13 > + <div style="position: absolute; left: -3px; top: 97px; width: 106px; height: 6px; background: green;"></div Ditto. > LayoutTests/fast/images/pdf-in-canvas.html:24 > +let image = document.getElementById("image"); You can create a detached image element instead. So you don't need to include the markup <img id="image"> and you do not need to set image.style.display = "none"; var image = new Image(); > LayoutTests/fast/images/pdf-in-canvas.html:30 > + context.fillRect(0, 0, 100, 100); Why do we need to fill the canvas with black after drawing the image? > LayoutTests/fast/images/pdf-in-canvas.html:32 > + requestAnimationFrame(tick); Why do we need to repeat this operation 10 times? 1775773 8 simon.fraser 2021-07-08 13:28:54 -0700 The changelog used the old title, which is confusing. 432635 2021-06-30 15:48:46 -0700 2021-07-06 15:26:37 -0700 Patch bug-227550-20210630154845.patch text/plain 6097 mmaxfield U3VidmVyc2lvbiBSZXZpc2lvbjogMjc5NDAwCmRpZmYgLS1naXQgYS9Tb3VyY2UvV2ViQ29yZS9D aGFuZ2VMb2cgYi9Tb3VyY2UvV2ViQ29yZS9DaGFuZ2VMb2cKaW5kZXggN2JmZDU3OTJhOWEzZGE2 ZGFkZjkwNTY4YTlkMzU1OWZjMDQ3ZmY4MS4uZTRlYmE1ZjI2Njk2NDc3MGUyODJmYmM2YjQzYzk2 M2I1ZDZjMzFlYiAxMDA2NDQKLS0tIGEvU291cmNlL1dlYkNvcmUvQ2hhbmdlTG9nCisrKyBiL1Nv 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