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