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authorCary Clark <caryclark@google.com>2017-03-24 11:41:24 -0400
committerChromium commit bot <commit-bot@chromium.org>2017-03-27 14:16:21 +0000
commitf4a9f83b38a0a45cda3205ad50747e6a7719f8ab (patch)
tree05f71d8ad670e465d9885364416b0ab8b3a90253 /core/fxcodec/codec
parent780f5529f0ed234def78e0e19e30c1a29ecc6b2f (diff)
downloadpdfium-f4a9f83b38a0a45cda3205ad50747e6a7719f8ab.tar.xz
fix new tab crash in skia clip stack
The crash on the new tab page is triggered by processing a transparency. This creates a new Skia device in CPDF_RenderStatus::LoadSMask(): // cpdf_renderstatus.cpp # 2557 if (!bitmap_device.Create(width, height, format, nullptr)) which sets the Skia clip stack to empty. It then calls RenderObjectList() RenderSingleObject() ProcessClipPath() which resets the clip stack; // cpdf_renderstatus.cpp # 1882 m_LastClipPath = ClipPath; m_pDevice->RestoreState(true); At this point m_LastClipPath contains {m_Ref={m_pObject={m_pObj=empty } } } The impelemntation in CFX_AggDeviceDriver::RestoreState() is // fx_agg_driver.cpp # 1283 if (m_StateStack.empty()) return; This hides unbalanced save/restores, but reworking PDFium to balance is nontrivial. R=dsinclair@chromium.org BUG=chromium:704442 Bug: Change-Id: Ia70d4dd7bd118e40adc5c029acbaa0b66372d3aa Reviewed-on: https://pdfium-review.googlesource.com/3191 Commit-Queue: dsinclair <dsinclair@chromium.org> Reviewed-by: dsinclair <dsinclair@chromium.org>
Diffstat (limited to 'core/fxcodec/codec')
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