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// 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,
CPDF_Stream* pStream)
: m_dwTimeCount(0),
m_MatteColor(0),
m_pRenderStatus(nullptr),
m_pDocument(pDoc),
m_pStream(pStream),
m_pCurBitmap(nullptr),
m_pCurMask(nullptr),
m_dwCacheSize(0) {}
CPDF_ImageCacheEntry::~CPDF_ImageCacheEntry() {}
void CPDF_ImageCacheEntry::Reset(const CFX_DIBitmap* pBitmap) {
m_pCachedBitmap.reset();
if (pBitmap)
m_pCachedBitmap = pBitmap->Clone();
CalcSize();
}
static uint32_t FPDF_ImageCache_EstimateImageSize(const CFX_DIBSource* pDIB) {
return pDIB && pDIB->GetBuffer()
? (uint32_t)pDIB->GetHeight() * pDIB->GetPitch() +
(uint32_t)pDIB->GetPaletteSize() * 4
: 0;
}
CFX_DIBSource* CPDF_ImageCacheEntry::DetachBitmap() {
CFX_DIBSource* pDIBSource = m_pCurBitmap;
m_pCurBitmap = nullptr;
return pDIBSource;
}
CFX_DIBSource* CPDF_ImageCacheEntry::DetachMask() {
CFX_DIBSource* pDIBSource = m_pCurMask;
m_pCurMask = nullptr;
return pDIBSource;
}
int CPDF_ImageCacheEntry::StartGetCachedBitmap(CPDF_Dictionary* pFormResources,
CPDF_Dictionary* pPageResources,
bool bStdCS,
uint32_t GroupFamily,
bool bLoadMask,
CPDF_RenderStatus* pRenderStatus,
int32_t downsampleWidth,
int32_t downsampleHeight) {
if (m_pCachedBitmap) {
m_pCurBitmap = m_pCachedBitmap.get();
m_pCurMask = m_pCachedMask.get();
return 1;
}
if (!pRenderStatus)
return 0;
m_pRenderStatus = pRenderStatus;
m_pCurBitmap = new CPDF_DIBSource;
int ret =
((CPDF_DIBSource*)m_pCurBitmap)
->StartLoadDIBSource(m_pDocument, m_pStream, true, pFormResources,
pPageResources, bStdCS, GroupFamily, bLoadMask);
if (ret == 2)
return ret;
if (!ret) {
delete m_pCurBitmap;
m_pCurBitmap = nullptr;
return 0;
}
ContinueGetCachedBitmap();
return 0;
}
void CPDF_ImageCacheEntry::ContinueGetCachedBitmap() {
m_MatteColor = ((CPDF_DIBSource*)m_pCurBitmap)->GetMatteColor();
m_pCurMask = ((CPDF_DIBSource*)m_pCurBitmap)->DetachMask();
CPDF_RenderContext* pContext = m_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();
delete m_pCurBitmap;
m_pCurBitmap = nullptr;
} else {
m_pCachedBitmap = pdfium::WrapUnique<CFX_DIBSource>(m_pCurBitmap);
}
if (m_pCurMask) {
m_pCachedMask = m_pCurMask->Clone();
delete m_pCurMask;
m_pCurMask = nullptr;
}
m_pCurBitmap = m_pCachedBitmap.get();
m_pCurMask = m_pCachedMask.get();
CalcSize();
}
int CPDF_ImageCacheEntry::Continue(IFX_Pause* pPause) {
int ret = ((CPDF_DIBSource*)m_pCurBitmap)->ContinueLoadDIBSource(pPause);
if (ret == 2)
return ret;
if (!ret) {
delete m_pCurBitmap;
m_pCurBitmap = nullptr;
return 0;
}
ContinueGetCachedBitmap();
return 0;
}
void CPDF_ImageCacheEntry::CalcSize() {
m_dwCacheSize = FPDF_ImageCache_EstimateImageSize(m_pCachedBitmap.get()) +
FPDF_ImageCache_EstimateImageSize(m_pCachedMask.get());
}
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