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_imageloader.h"
8
9 #include "core/fpdfapi/page/cpdf_image.h"
10 #include "core/fpdfapi/page/cpdf_imageobject.h"
11 #include "core/fpdfapi/render/cpdf_dibsource.h"
12 #include "core/fpdfapi/render/cpdf_imagecacheentry.h"
13 #include "core/fpdfapi/render/cpdf_pagerendercache.h"
14 #include "core/fpdfapi/render/cpdf_renderstatus.h"
15 #include "core/fxcrt/fx_basic.h"
16
CPDF_ImageLoader()17 CPDF_ImageLoader::CPDF_ImageLoader()
18 : m_pBitmap(nullptr),
19 m_pMask(nullptr),
20 m_MatteColor(0),
21 m_bCached(false),
22 m_nDownsampleWidth(0),
23 m_nDownsampleHeight(0),
24 m_pCache(nullptr),
25 m_pImage(nullptr) {}
26
~CPDF_ImageLoader()27 CPDF_ImageLoader::~CPDF_ImageLoader() {
28 if (!m_bCached) {
29 delete m_pBitmap;
30 delete m_pMask;
31 }
32 }
33
Start(const CPDF_ImageObject * pImage,CPDF_PageRenderCache * pCache,bool bStdCS,uint32_t GroupFamily,bool bLoadMask,CPDF_RenderStatus * pRenderStatus,int32_t nDownsampleWidth,int32_t nDownsampleHeight)34 bool CPDF_ImageLoader::Start(const CPDF_ImageObject* pImage,
35 CPDF_PageRenderCache* pCache,
36 bool bStdCS,
37 uint32_t GroupFamily,
38 bool bLoadMask,
39 CPDF_RenderStatus* pRenderStatus,
40 int32_t nDownsampleWidth,
41 int32_t nDownsampleHeight) {
42 m_nDownsampleWidth = nDownsampleWidth;
43 m_nDownsampleHeight = nDownsampleHeight;
44 m_pCache = pCache;
45 m_pImage = const_cast<CPDF_ImageObject*>(pImage);
46 bool ret;
47 if (pCache) {
48 ret = pCache->StartGetCachedBitmap(
49 m_pImage->GetImage()->GetStream(), bStdCS, GroupFamily, bLoadMask,
50 pRenderStatus, m_nDownsampleWidth, m_nDownsampleHeight);
51 } else {
52 ret = m_pImage->GetImage()->StartLoadDIBSource(
53 pRenderStatus->m_pFormResource, pRenderStatus->m_pPageResource, bStdCS,
54 GroupFamily, bLoadMask);
55 }
56 if (!ret)
57 HandleFailure();
58 return ret;
59 }
60
Continue(IFX_Pause * pPause)61 bool CPDF_ImageLoader::Continue(IFX_Pause* pPause) {
62 bool ret = m_pCache ? m_pCache->Continue(pPause)
63 : m_pImage->GetImage()->Continue(pPause);
64 if (!ret)
65 HandleFailure();
66 return ret;
67 }
68
HandleFailure()69 void CPDF_ImageLoader::HandleFailure() {
70 if (m_pCache) {
71 CPDF_ImageCacheEntry* entry = m_pCache->GetCurImageCacheEntry();
72 m_bCached = true;
73 m_pBitmap = entry->DetachBitmap();
74 m_pMask = entry->DetachMask();
75 m_MatteColor = entry->m_MatteColor;
76 return;
77 }
78 CPDF_Image* pImage = m_pImage->GetImage();
79 m_bCached = false;
80 m_pBitmap = pImage->DetachBitmap();
81 m_pMask = pImage->DetachMask();
82 m_MatteColor = pImage->m_MatteColor;
83 }
84