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 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 28 CPDF_RenderContext::CPDF_RenderContext(CPDF_Document* pDoc, 29 CPDF_PageRenderCache* pPageCache) 30 : m_pDocument(pDoc), m_pPageResources(nullptr), m_pPageCache(pPageCache) {} 31 32 CPDF_RenderContext::~CPDF_RenderContext() {} 33 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 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 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 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 91 CPDF_RenderContext::Layer::Layer() {} 92 93 CPDF_RenderContext::Layer::Layer(const Layer& that) = default; 94 95 CPDF_RenderContext::Layer::~Layer() {} 96
