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_progressiverenderer.h"
8
9 #include "core/fpdfapi/page/cpdf_image.h"
10 #include "core/fpdfapi/page/cpdf_imageobject.h"
11 #include "core/fpdfapi/page/cpdf_pageobject.h"
12 #include "core/fpdfapi/page/cpdf_pageobjectholder.h"
13 #include "core/fpdfapi/render/cpdf_pagerendercache.h"
14 #include "core/fpdfapi/render/cpdf_renderoptions.h"
15 #include "core/fpdfapi/render/cpdf_renderstatus.h"
16 #include "core/fxcrt/pauseindicator_iface.h"
17 #include "core/fxge/cfx_renderdevice.h"
18
CPDF_ProgressiveRenderer(CPDF_RenderContext * pContext,CFX_RenderDevice * pDevice,const CPDF_RenderOptions * pOptions)19 CPDF_ProgressiveRenderer::CPDF_ProgressiveRenderer(
20 CPDF_RenderContext* pContext,
21 CFX_RenderDevice* pDevice,
22 const CPDF_RenderOptions* pOptions)
23 : m_pContext(pContext), m_pDevice(pDevice), m_pOptions(pOptions) {}
24
~CPDF_ProgressiveRenderer()25 CPDF_ProgressiveRenderer::~CPDF_ProgressiveRenderer() {
26 if (m_pRenderStatus) {
27 m_pRenderStatus.reset(); // Release first.
28 m_pDevice->RestoreState(false);
29 }
30 }
31
Start(PauseIndicatorIface * pPause)32 void CPDF_ProgressiveRenderer::Start(PauseIndicatorIface* pPause) {
33 if (!m_pContext || !m_pDevice || m_Status != kReady) {
34 m_Status = kFailed;
35 return;
36 }
37 m_Status = kToBeContinued;
38 Continue(pPause);
39 }
40
Continue(PauseIndicatorIface * pPause)41 void CPDF_ProgressiveRenderer::Continue(PauseIndicatorIface* pPause) {
42 while (m_Status == kToBeContinued) {
43 if (!m_pCurrentLayer) {
44 if (m_LayerIndex >= m_pContext->CountLayers()) {
45 m_Status = kDone;
46 return;
47 }
48 m_pCurrentLayer = m_pContext->GetLayer(m_LayerIndex);
49 m_LastObjectRendered = m_pCurrentLayer->m_pObjectHolder->end();
50 m_pRenderStatus = std::make_unique<CPDF_RenderStatus>(m_pContext.Get(),
51 m_pDevice.Get());
52 if (m_pOptions)
53 m_pRenderStatus->SetOptions(*m_pOptions);
54 m_pRenderStatus->SetTransparency(
55 m_pCurrentLayer->m_pObjectHolder->GetTransparency());
56 m_pRenderStatus->Initialize(nullptr, nullptr);
57 m_pDevice->SaveState();
58 m_ClipRect = m_pCurrentLayer->m_Matrix.GetInverse().TransformRect(
59 CFX_FloatRect(m_pDevice->GetClipBox()));
60 }
61 CPDF_PageObjectHolder::const_iterator iter;
62 CPDF_PageObjectHolder::const_iterator iterEnd =
63 m_pCurrentLayer->m_pObjectHolder->end();
64 if (m_LastObjectRendered != iterEnd) {
65 iter = m_LastObjectRendered;
66 ++iter;
67 } else {
68 iter = m_pCurrentLayer->m_pObjectHolder->begin();
69 }
70 int nObjsToGo = kStepLimit;
71 bool is_mask = false;
72 while (iter != iterEnd) {
73 CPDF_PageObject* pCurObj = iter->get();
74 if (pCurObj && pCurObj->GetRect().left <= m_ClipRect.right &&
75 pCurObj->GetRect().right >= m_ClipRect.left &&
76 pCurObj->GetRect().bottom <= m_ClipRect.top &&
77 pCurObj->GetRect().top >= m_ClipRect.bottom) {
78 if (m_pOptions->GetOptions().bBreakForMasks && pCurObj->IsImage() &&
79 pCurObj->AsImage()->GetImage()->IsMask()) {
80 if (m_pDevice->GetDeviceType() == DeviceType::kPrinter) {
81 m_LastObjectRendered = iter;
82 m_pRenderStatus->ProcessClipPath(pCurObj->m_ClipPath,
83 m_pCurrentLayer->m_Matrix);
84 return;
85 }
86 is_mask = true;
87 }
88 if (m_pRenderStatus->ContinueSingleObject(
89 pCurObj, m_pCurrentLayer->m_Matrix, pPause)) {
90 return;
91 }
92 if (pCurObj->IsImage() && m_pRenderStatus->GetRenderOptions()
93 .GetOptions()
94 .bLimitedImageCache) {
95 m_pContext->GetPageCache()->CacheOptimization(
96 m_pRenderStatus->GetRenderOptions().GetCacheSizeLimit());
97 }
98 if (pCurObj->IsForm() || pCurObj->IsShading())
99 nObjsToGo = 0;
100 else
101 --nObjsToGo;
102 }
103 m_LastObjectRendered = iter;
104 if (nObjsToGo == 0) {
105 if (pPause && pPause->NeedToPauseNow())
106 return;
107 nObjsToGo = kStepLimit;
108 }
109 ++iter;
110 if (is_mask && iter != iterEnd)
111 return;
112 }
113 if (m_pCurrentLayer->m_pObjectHolder->GetParseState() ==
114 CPDF_PageObjectHolder::ParseState::kParsed) {
115 m_pRenderStatus.reset();
116 m_pDevice->RestoreState(false);
117 m_pCurrentLayer = nullptr;
118 m_LayerIndex++;
119 if (is_mask || (pPause && pPause->NeedToPauseNow()))
120 return;
121 } else if (is_mask) {
122 return;
123 } else {
124 m_pCurrentLayer->m_pObjectHolder->ContinueParse(pPause);
125 if (m_pCurrentLayer->m_pObjectHolder->GetParseState() !=
126 CPDF_PageObjectHolder::ParseState::kParsed) {
127 return;
128 }
129 }
130 }
131 }
132