// Copyright 2016 PDFium Authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com #include "core/fpdfapi/render/cpdf_imagecacheentry.h" #include <memory> #include <utility> #include "core/fpdfapi/page/cpdf_page.h" #include "core/fpdfapi/parser/cpdf_dictionary.h" #include "core/fpdfapi/parser/cpdf_document.h" #include "core/fpdfapi/parser/cpdf_stream.h" #include "core/fpdfapi/render/cpdf_dibsource.h" #include "core/fpdfapi/render/cpdf_pagerendercache.h" #include "core/fpdfapi/render/cpdf_rendercontext.h" #include "core/fpdfapi/render/cpdf_renderstatus.h" CPDF_ImageCacheEntry::CPDF_ImageCacheEntry(CPDF_Document* pDoc, const RetainPtr<CPDF_Image>& pImage) : m_dwTimeCount(0), m_MatteColor(0), m_pDocument(pDoc), m_pImage(pImage), m_dwCacheSize(0) {} CPDF_ImageCacheEntry::~CPDF_ImageCacheEntry() {} void CPDF_ImageCacheEntry::Reset(const RetainPtr<CFX_DIBitmap>& pBitmap) { m_pCachedBitmap.Reset(); if (pBitmap) m_pCachedBitmap = pBitmap->Clone(nullptr); CalcSize(); } static uint32_t FPDF_ImageCache_EstimateImageSize( const RetainPtr<CFX_DIBSource>& pDIB) { return pDIB && pDIB->GetBuffer() ? (uint32_t)pDIB->GetHeight() * pDIB->GetPitch() + (uint32_t)pDIB->GetPaletteSize() * 4 : 0; } RetainPtr<CFX_DIBSource> CPDF_ImageCacheEntry::DetachBitmap() { return std::move(m_pCurBitmap); } RetainPtr<CFX_DIBSource> CPDF_ImageCacheEntry::DetachMask() { return std::move(m_pCurMask); } int CPDF_ImageCacheEntry::StartGetCachedBitmap( CPDF_Dictionary* pFormResources, CPDF_Dictionary* pPageResources, bool bStdCS, uint32_t GroupFamily, bool bLoadMask, CPDF_RenderStatus* pRenderStatus) { ASSERT(pRenderStatus); if (m_pCachedBitmap) { m_pCurBitmap = m_pCachedBitmap; m_pCurMask = m_pCachedMask; return 1; } m_pCurBitmap = pdfium::MakeRetain<CPDF_DIBSource>(); int ret = m_pCurBitmap.As<CPDF_DIBSource>()->StartLoadDIBSource( m_pDocument.Get(), m_pImage->GetStream(), true, pFormResources, pPageResources, bStdCS, GroupFamily, bLoadMask); if (ret == 2) return ret; if (!ret) { m_pCurBitmap.Reset(); return 0; } ContinueGetCachedBitmap(pRenderStatus); return 0; } void CPDF_ImageCacheEntry::ContinueGetCachedBitmap( CPDF_RenderStatus* pRenderStatus) { m_MatteColor = m_pCurBitmap.As<CPDF_DIBSource>()->GetMatteColor(); m_pCurMask = m_pCurBitmap.As<CPDF_DIBSource>()->DetachMask(); CPDF_RenderContext* pContext = pRenderStatus->GetContext(); CPDF_PageRenderCache* pPageRenderCache = pContext->GetPageCache(); m_dwTimeCount = pPageRenderCache->GetTimeCount(); if (m_pCurBitmap->GetPitch() * m_pCurBitmap->GetHeight() < FPDF_HUGE_IMAGE_SIZE) { m_pCachedBitmap = m_pCurBitmap->Clone(nullptr); m_pCurBitmap.Reset(); } else { m_pCachedBitmap = m_pCurBitmap; } if (m_pCurMask) { m_pCachedMask = m_pCurMask->Clone(nullptr); m_pCurMask.Reset(); } m_pCurBitmap = m_pCachedBitmap; m_pCurMask = m_pCachedMask; CalcSize(); } int CPDF_ImageCacheEntry::Continue(IFX_PauseIndicator* pPause, CPDF_RenderStatus* pRenderStatus) { int ret = m_pCurBitmap.As<CPDF_DIBSource>()->ContinueLoadDIBSource(pPause); if (!ret) { m_pCurBitmap.Reset(); return 0; } if (ret == 2) return ret; ContinueGetCachedBitmap(pRenderStatus); return 0; } void CPDF_ImageCacheEntry::CalcSize() { m_dwCacheSize = FPDF_ImageCache_EstimateImageSize(m_pCachedBitmap) + FPDF_ImageCache_EstimateImageSize(m_pCachedMask); }