From c48089977dc4d2a63d37e6668382c10b42e22a72 Mon Sep 17 00:00:00 2001 From: dsinclair Date: Mon, 19 Sep 2016 08:37:10 -0700 Subject: Revert of Pdfium: Fix fonts leaking on ClosePage. (patchset #10 id:180001 of https://codereview.chromium.org/2158023002/ ) Reason for revert: Causes heap-use-after-free. See crbug.com/647612. Original issue's description: > Fix memory leaking on ClosePage. > CFX_FontCache refactoring: > after this CL: Only one global CFX_FontCache used. Any cached items from it, are released, when its are not used. > > BUG=79367,48791 > > The fonts was not cleared after unloading pages. > > Test pdf: > > http://www.nasa.gov/pdf/750614main_NASA_FY_2014_Budget_Estimates-508.pdf > > For this file, we have ~5 fonts per page, which equal ~1 Mb per page. > In this PDF we have 670 pages, as result after slow scrolling(reading) full document we have ~600 Mb fonts data in memory. > > memory usage of PDF Plugin: > before this CL: ~660 Mb > after this CL: ~100 Mb > > Committed: https://pdfium.googlesource.com/pdfium/+/cde5101eb15b24519e89fa500fe37038bc8e2201 TBR=tsepez@chromium.org,brucedawson@chromium.org,npm@chromium.org,art-snake@yandex-team.ru # Not skipping CQ checks because original CL landed more than 1 days ago. BUG=79367,48791 Review-Url: https://codereview.chromium.org/2350763002 --- core/fxge/skia/fx_skia_device.cpp | 27 +++++++++++++++++++-------- 1 file changed, 19 insertions(+), 8 deletions(-) (limited to 'core/fxge/skia/fx_skia_device.cpp') diff --git a/core/fxge/skia/fx_skia_device.cpp b/core/fxge/skia/fx_skia_device.cpp index b1c47bfedf..d2e4abce92 100644 --- a/core/fxge/skia/fx_skia_device.cpp +++ b/core/fxge/skia/fx_skia_device.cpp @@ -14,6 +14,7 @@ #include "core/fpdfapi/fpdf_parser/include/cpdf_array.h" #include "core/fpdfapi/fpdf_parser/include/cpdf_dictionary.h" #include "core/fpdfapi/fpdf_parser/include/cpdf_stream_acc.h" +#include "core/fxge/include/cfx_fontcache.h" #include "core/fxge/include/cfx_fxgedevice.h" #include "core/fxge/include/cfx_gemodule.h" #include "core/fxge/include/cfx_graphstatedata.h" @@ -485,6 +486,7 @@ class SkiaState { // mark all cached state as uninitialized SkiaState() : m_pFont(nullptr), + m_pCache(nullptr), m_fontSize(0), m_fillColor(0), m_strokeColor(0), @@ -578,6 +580,7 @@ class SkiaState { bool DrawText(int nChars, const FXTEXT_CHARPOS* pCharPos, CFX_Font* pFont, + CFX_FontCache* pCache, const CFX_Matrix* pMatrix, FX_FLOAT font_size, uint32_t color, @@ -588,12 +591,13 @@ class SkiaState { FlushCommands(pDriver); if (m_drawPath) FlushPath(pDriver); - if (m_drawText && FontChanged(pFont, pMatrix, font_size, color)) + if (m_drawText && FontChanged(pFont, pCache, pMatrix, font_size, color)) FlushText(pDriver); if (!m_drawText) { m_positions.setCount(0); m_glyphs.setCount(0); m_pFont = pFont; + m_pCache = pCache; m_fontSize = font_size; m_fillColor = color; m_drawMatrix = *pMatrix; @@ -622,8 +626,8 @@ class SkiaState { SkPaint skPaint; skPaint.setAntiAlias(true); skPaint.setColor(m_fillColor); - if (m_pFont->GetFace()) { // exclude placeholder test fonts - sk_sp typeface(SkSafeRef(m_pFont->GetDeviceCache())); + if (m_pFont->GetFace() && m_pCache) { // exclude placeholder test fonts + sk_sp typeface(SkSafeRef(m_pCache->GetDeviceCache(m_pFont))); skPaint.setTypeface(typeface); } skPaint.setTextEncoding(SkPaint::kGlyphID_TextEncoding); @@ -779,11 +783,13 @@ class SkiaState { } bool FontChanged(CFX_Font* pFont, + CFX_FontCache* pCache, const CFX_Matrix* pMatrix, FX_FLOAT font_size, uint32_t color) { - return pFont != m_pFont || MatrixChanged(pMatrix, m_drawMatrix) || - font_size != m_fontSize || color != m_fillColor; + return pFont != m_pFont || pCache != m_pCache || + MatrixChanged(pMatrix, m_drawMatrix) || font_size != m_fontSize || + color != m_fillColor; } bool MatrixChanged(const CFX_Matrix* pMatrix, const CFX_Matrix& refMatrix) { @@ -866,6 +872,7 @@ class SkiaState { CFX_GraphStateData m_drawState; CFX_Matrix m_clipMatrix; CFX_Font* m_pFont; + CFX_FontCache* m_pCache; FX_FLOAT m_fontSize; uint32_t m_fillColor; uint32_t m_strokeColor; @@ -998,14 +1005,18 @@ void CFX_SkiaDeviceDriver::Flush() { FX_BOOL CFX_SkiaDeviceDriver::DrawDeviceText(int nChars, const FXTEXT_CHARPOS* pCharPos, CFX_Font* pFont, + CFX_FontCache* pCache, const CFX_Matrix* pObject2Device, FX_FLOAT font_size, uint32_t color) { - if (m_pCache->DrawText(nChars, pCharPos, pFont, pObject2Device, font_size, - color, this)) { + if (!pCache) + pCache = CFX_GEModule::Get()->GetFontCache(); + if (m_pCache->DrawText(nChars, pCharPos, pFont, pCache, pObject2Device, + font_size, color, this)) { return TRUE; } - sk_sp typeface(SkSafeRef(pFont->GetDeviceCache())); + sk_sp typeface( + SkSafeRef(pCache ? pCache->GetDeviceCache(pFont) : nullptr)); SkPaint paint; paint.setAntiAlias(true); paint.setColor(color); -- cgit v1.2.3