1 // Copyright 2016 PDFium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
6
7 #include "core/fpdfapi/render/cpdf_imagecacheentry.h"
8
9 #include <memory>
10 #include <utility>
11
12 #include "core/fpdfapi/page/cpdf_page.h"
13 #include "core/fpdfapi/parser/cpdf_dictionary.h"
14 #include "core/fpdfapi/parser/cpdf_document.h"
15 #include "core/fpdfapi/parser/cpdf_stream.h"
16 #include "core/fpdfapi/render/cpdf_dibsource.h"
17 #include "core/fpdfapi/render/cpdf_pagerendercache.h"
18 #include "core/fpdfapi/render/cpdf_rendercontext.h"
19 #include "core/fpdfapi/render/cpdf_renderstatus.h"
20 #include "core/fxge/dib/cfx_dibitmap.h"
21
CPDF_ImageCacheEntry(CPDF_Document * pDoc,const RetainPtr<CPDF_Image> & pImage)22 CPDF_ImageCacheEntry::CPDF_ImageCacheEntry(CPDF_Document* pDoc,
23 const RetainPtr<CPDF_Image>& pImage)
24 : m_dwTimeCount(0),
25 m_MatteColor(0),
26 m_pDocument(pDoc),
27 m_pImage(pImage),
28 m_dwCacheSize(0) {}
29
~CPDF_ImageCacheEntry()30 CPDF_ImageCacheEntry::~CPDF_ImageCacheEntry() {}
31
Reset(const RetainPtr<CFX_DIBitmap> & pBitmap)32 void CPDF_ImageCacheEntry::Reset(const RetainPtr<CFX_DIBitmap>& pBitmap) {
33 m_pCachedBitmap.Reset();
34 if (pBitmap)
35 m_pCachedBitmap = pBitmap->Clone(nullptr);
36 CalcSize();
37 }
38
FPDF_ImageCache_EstimateImageSize(const RetainPtr<CFX_DIBSource> & pDIB)39 static uint32_t FPDF_ImageCache_EstimateImageSize(
40 const RetainPtr<CFX_DIBSource>& pDIB) {
41 return pDIB && pDIB->GetBuffer()
42 ? (uint32_t)pDIB->GetHeight() * pDIB->GetPitch() +
43 (uint32_t)pDIB->GetPaletteSize() * 4
44 : 0;
45 }
46
DetachBitmap()47 RetainPtr<CFX_DIBSource> CPDF_ImageCacheEntry::DetachBitmap() {
48 return std::move(m_pCurBitmap);
49 }
50
DetachMask()51 RetainPtr<CFX_DIBSource> CPDF_ImageCacheEntry::DetachMask() {
52 return std::move(m_pCurMask);
53 }
54
StartGetCachedBitmap(CPDF_Dictionary * pFormResources,CPDF_Dictionary * pPageResources,bool bStdCS,uint32_t GroupFamily,bool bLoadMask,CPDF_RenderStatus * pRenderStatus)55 int CPDF_ImageCacheEntry::StartGetCachedBitmap(
56 CPDF_Dictionary* pFormResources,
57 CPDF_Dictionary* pPageResources,
58 bool bStdCS,
59 uint32_t GroupFamily,
60 bool bLoadMask,
61 CPDF_RenderStatus* pRenderStatus) {
62 ASSERT(pRenderStatus);
63
64 if (m_pCachedBitmap) {
65 m_pCurBitmap = m_pCachedBitmap;
66 m_pCurMask = m_pCachedMask;
67 return 1;
68 }
69
70 m_pCurBitmap = pdfium::MakeRetain<CPDF_DIBSource>();
71 int ret = m_pCurBitmap.As<CPDF_DIBSource>()->StartLoadDIBSource(
72 m_pDocument.Get(), m_pImage->GetStream(), true, pFormResources,
73 pPageResources, bStdCS, GroupFamily, bLoadMask);
74 if (ret == 2)
75 return ret;
76
77 if (!ret) {
78 m_pCurBitmap.Reset();
79 return 0;
80 }
81 ContinueGetCachedBitmap(pRenderStatus);
82 return 0;
83 }
84
ContinueGetCachedBitmap(CPDF_RenderStatus * pRenderStatus)85 void CPDF_ImageCacheEntry::ContinueGetCachedBitmap(
86 CPDF_RenderStatus* pRenderStatus) {
87 m_MatteColor = m_pCurBitmap.As<CPDF_DIBSource>()->GetMatteColor();
88 m_pCurMask = m_pCurBitmap.As<CPDF_DIBSource>()->DetachMask();
89 CPDF_RenderContext* pContext = pRenderStatus->GetContext();
90 CPDF_PageRenderCache* pPageRenderCache = pContext->GetPageCache();
91 m_dwTimeCount = pPageRenderCache->GetTimeCount();
92 if (m_pCurBitmap->GetPitch() * m_pCurBitmap->GetHeight() <
93 FPDF_HUGE_IMAGE_SIZE) {
94 m_pCachedBitmap = m_pCurBitmap->Clone(nullptr);
95 m_pCurBitmap.Reset();
96 } else {
97 m_pCachedBitmap = m_pCurBitmap;
98 }
99 if (m_pCurMask) {
100 m_pCachedMask = m_pCurMask->Clone(nullptr);
101 m_pCurMask.Reset();
102 }
103 m_pCurBitmap = m_pCachedBitmap;
104 m_pCurMask = m_pCachedMask;
105 CalcSize();
106 }
107
Continue(IFX_PauseIndicator * pPause,CPDF_RenderStatus * pRenderStatus)108 int CPDF_ImageCacheEntry::Continue(IFX_PauseIndicator* pPause,
109 CPDF_RenderStatus* pRenderStatus) {
110 int ret = m_pCurBitmap.As<CPDF_DIBSource>()->ContinueLoadDIBSource(pPause);
111 if (!ret) {
112 m_pCurBitmap.Reset();
113 return 0;
114 }
115 if (ret == 2)
116 return ret;
117
118 ContinueGetCachedBitmap(pRenderStatus);
119 return 0;
120 }
121
CalcSize()122 void CPDF_ImageCacheEntry::CalcSize() {
123 m_dwCacheSize = FPDF_ImageCache_EstimateImageSize(m_pCachedBitmap) +
124 FPDF_ImageCache_EstimateImageSize(m_pCachedMask);
125 }
126