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_rendercontext.h"
8
9 #include "core/fpdfapi/page/cpdf_page.h"
10 #include "core/fpdfapi/page/cpdf_pageobject.h"
11 #include "core/fpdfapi/page/cpdf_pageobjectholder.h"
12 #include "core/fpdfapi/parser/cpdf_dictionary.h"
13 #include "core/fpdfapi/parser/cpdf_document.h"
14 #include "core/fpdfapi/render/cpdf_pagerendercache.h"
15 #include "core/fpdfapi/render/cpdf_progressiverenderer.h"
16 #include "core/fpdfapi/render/cpdf_renderoptions.h"
17 #include "core/fpdfapi/render/cpdf_renderstatus.h"
18 #include "core/fpdfapi/render/cpdf_textrenderer.h"
19 #include "core/fxge/cfx_renderdevice.h"
20 #include "core/fxge/dib/cfx_dibitmap.h"
21 #include "core/fxge/fx_dib.h"
22
CPDF_RenderContext(CPDF_Page * pPage)23 CPDF_RenderContext::CPDF_RenderContext(CPDF_Page* pPage)
24 : m_pDocument(pPage->m_pDocument.Get()),
25 m_pPageResources(pPage->m_pPageResources.Get()),
26 m_pPageCache(pPage->GetRenderCache()) {}
27
CPDF_RenderContext(CPDF_Document * pDoc,CPDF_PageRenderCache * pPageCache)28 CPDF_RenderContext::CPDF_RenderContext(CPDF_Document* pDoc,
29 CPDF_PageRenderCache* pPageCache)
30 : m_pDocument(pDoc), m_pPageResources(nullptr), m_pPageCache(pPageCache) {}
31
~CPDF_RenderContext()32 CPDF_RenderContext::~CPDF_RenderContext() {}
33
GetBackground(const RetainPtr<CFX_DIBitmap> & pBuffer,const CPDF_PageObject * pObj,const CPDF_RenderOptions * pOptions,CFX_Matrix * pFinalMatrix)34 void CPDF_RenderContext::GetBackground(const RetainPtr<CFX_DIBitmap>& pBuffer,
35 const CPDF_PageObject* pObj,
36 const CPDF_RenderOptions* pOptions,
37 CFX_Matrix* pFinalMatrix) {
38 CFX_DefaultRenderDevice device;
39 device.Attach(pBuffer, false, nullptr, false);
40
41 FX_RECT rect(0, 0, device.GetWidth(), device.GetHeight());
42 device.FillRect(&rect, 0xffffffff);
43 Render(&device, pObj, pOptions, pFinalMatrix);
44 }
45
AppendLayer(CPDF_PageObjectHolder * pObjectHolder,const CFX_Matrix * pObject2Device)46 void CPDF_RenderContext::AppendLayer(CPDF_PageObjectHolder* pObjectHolder,
47 const CFX_Matrix* pObject2Device) {
48 m_Layers.emplace_back();
49 m_Layers.back().m_pObjectHolder = pObjectHolder;
50 if (pObject2Device)
51 m_Layers.back().m_Matrix = *pObject2Device;
52 else
53 m_Layers.back().m_Matrix.SetIdentity();
54 }
55
Render(CFX_RenderDevice * pDevice,const CPDF_RenderOptions * pOptions,const CFX_Matrix * pLastMatrix)56 void CPDF_RenderContext::Render(CFX_RenderDevice* pDevice,
57 const CPDF_RenderOptions* pOptions,
58 const CFX_Matrix* pLastMatrix) {
59 Render(pDevice, nullptr, pOptions, pLastMatrix);
60 }
61
Render(CFX_RenderDevice * pDevice,const CPDF_PageObject * pStopObj,const CPDF_RenderOptions * pOptions,const CFX_Matrix * pLastMatrix)62 void CPDF_RenderContext::Render(CFX_RenderDevice* pDevice,
63 const CPDF_PageObject* pStopObj,
64 const CPDF_RenderOptions* pOptions,
65 const CFX_Matrix* pLastMatrix) {
66 for (auto& layer : m_Layers) {
67 CFX_RenderDevice::StateRestorer restorer(pDevice);
68 CPDF_RenderStatus status;
69 if (pLastMatrix) {
70 CFX_Matrix FinalMatrix = layer.m_Matrix;
71 FinalMatrix.Concat(*pLastMatrix);
72 status.Initialize(this, pDevice, pLastMatrix, pStopObj, nullptr, nullptr,
73 pOptions, layer.m_pObjectHolder->m_iTransparency, false,
74 nullptr);
75 status.RenderObjectList(layer.m_pObjectHolder.Get(), &FinalMatrix);
76 } else {
77 status.Initialize(this, pDevice, nullptr, pStopObj, nullptr, nullptr,
78 pOptions, layer.m_pObjectHolder->m_iTransparency, false,
79 nullptr);
80 status.RenderObjectList(layer.m_pObjectHolder.Get(), &layer.m_Matrix);
81 }
82 if (status.GetRenderOptions()->HasFlag(RENDER_LIMITEDIMAGECACHE)) {
83 m_pPageCache->CacheOptimization(
84 status.GetRenderOptions()->GetCacheSizeLimit());
85 }
86 if (status.IsStopped())
87 break;
88 }
89 }
90
Layer()91 CPDF_RenderContext::Layer::Layer() {}
92
93 CPDF_RenderContext::Layer::Layer(const Layer& that) = default;
94
~Layer()95 CPDF_RenderContext::Layer::~Layer() {}
96