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/fx_dib.h" 21 22 CPDF_RenderContext::CPDF_RenderContext(CPDF_Page* pPage) 23 : m_pDocument(pPage->m_pDocument), 24 m_pPageResources(pPage->m_pPageResources), 25 m_pPageCache(pPage->GetRenderCache()) {} 26 27 CPDF_RenderContext::CPDF_RenderContext(CPDF_Document* pDoc, 28 CPDF_PageRenderCache* pPageCache) 29 : m_pDocument(pDoc), m_pPageResources(nullptr), m_pPageCache(pPageCache) {} 30 31 CPDF_RenderContext::~CPDF_RenderContext() {} 32 33 void CPDF_RenderContext::GetBackground(CFX_DIBitmap* pBuffer, 34 const CPDF_PageObject* pObj, 35 const CPDF_RenderOptions* pOptions, 36 CFX_Matrix* pFinalMatrix) { 37 CFX_FxgeDevice device; 38 device.Attach(pBuffer, false, nullptr, false); 39 40 FX_RECT rect(0, 0, device.GetWidth(), device.GetHeight()); 41 device.FillRect(&rect, 0xffffffff); 42 Render(&device, pObj, pOptions, pFinalMatrix); 43 } 44 45 void CPDF_RenderContext::AppendLayer(CPDF_PageObjectHolder* pObjectHolder, 46 const CFX_Matrix* pObject2Device) { 47 m_Layers.emplace_back(); 48 m_Layers.back().m_pObjectHolder = pObjectHolder; 49 if (pObject2Device) 50 m_Layers.back().m_Matrix = *pObject2Device; 51 else 52 m_Layers.back().m_Matrix.SetIdentity(); 53 } 54 55 void CPDF_RenderContext::Render(CFX_RenderDevice* pDevice, 56 const CPDF_RenderOptions* pOptions, 57 const CFX_Matrix* pLastMatrix) { 58 Render(pDevice, nullptr, pOptions, pLastMatrix); 59 } 60 61 void CPDF_RenderContext::Render(CFX_RenderDevice* pDevice, 62 const CPDF_PageObject* pStopObj, 63 const CPDF_RenderOptions* pOptions, 64 const CFX_Matrix* pLastMatrix) { 65 for (auto& layer : m_Layers) { 66 pDevice->SaveState(); 67 if (pLastMatrix) { 68 CFX_Matrix FinalMatrix = layer.m_Matrix; 69 FinalMatrix.Concat(*pLastMatrix); 70 CPDF_RenderStatus status; 71 status.Initialize(this, pDevice, pLastMatrix, pStopObj, nullptr, nullptr, 72 pOptions, layer.m_pObjectHolder->m_Transparency, false, 73 nullptr); 74 status.RenderObjectList(layer.m_pObjectHolder, &FinalMatrix); 75 if (status.m_Options.m_Flags & RENDER_LIMITEDIMAGECACHE) 76 m_pPageCache->CacheOptimization(status.m_Options.m_dwLimitCacheSize); 77 if (status.m_bStopped) { 78 pDevice->RestoreState(false); 79 break; 80 } 81 } else { 82 CPDF_RenderStatus status; 83 status.Initialize(this, pDevice, nullptr, pStopObj, nullptr, nullptr, 84 pOptions, layer.m_pObjectHolder->m_Transparency, false, 85 nullptr); 86 status.RenderObjectList(layer.m_pObjectHolder, &layer.m_Matrix); 87 if (status.m_Options.m_Flags & RENDER_LIMITEDIMAGECACHE) 88 m_pPageCache->CacheOptimization(status.m_Options.m_dwLimitCacheSize); 89 if (status.m_bStopped) { 90 pDevice->RestoreState(false); 91 break; 92 } 93 } 94 pDevice->RestoreState(false); 95 } 96 } 97
