xref: /aosp_15_r20/external/pdfium/core/fpdfapi/render/cpdf_rendercontext.cpp (revision 3ac0a46f773bac49fa9476ec2b1cf3f8da5ec3a4)
1 // Copyright 2016 The PDFium Authors
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 <utility>
10 
11 #include "core/fpdfapi/page/cpdf_pageimagecache.h"
12 #include "core/fpdfapi/page/cpdf_pageobject.h"
13 #include "core/fpdfapi/page/cpdf_pageobjectholder.h"
14 #include "core/fpdfapi/parser/cpdf_dictionary.h"
15 #include "core/fpdfapi/parser/cpdf_document.h"
16 #include "core/fpdfapi/render/cpdf_progressiverenderer.h"
17 #include "core/fpdfapi/render/cpdf_renderoptions.h"
18 #include "core/fpdfapi/render/cpdf_renderstatus.h"
19 #include "core/fpdfapi/render/cpdf_textrenderer.h"
20 #include "core/fxge/cfx_defaultrenderdevice.h"
21 #include "core/fxge/cfx_renderdevice.h"
22 #include "core/fxge/dib/cfx_dibitmap.h"
23 #include "core/fxge/dib/fx_dib.h"
24 
CPDF_RenderContext(CPDF_Document * pDoc,RetainPtr<CPDF_Dictionary> pPageResources,CPDF_PageImageCache * pPageCache)25 CPDF_RenderContext::CPDF_RenderContext(
26     CPDF_Document* pDoc,
27     RetainPtr<CPDF_Dictionary> pPageResources,
28     CPDF_PageImageCache* pPageCache)
29     : m_pDocument(pDoc),
30       m_pPageResources(std::move(pPageResources)),
31       m_pPageCache(pPageCache) {}
32 
33 CPDF_RenderContext::~CPDF_RenderContext() = default;
34 
GetBackground(RetainPtr<CFX_DIBitmap> pBuffer,const CPDF_PageObject * pObj,const CPDF_RenderOptions * pOptions,const CFX_Matrix & mtFinal)35 void CPDF_RenderContext::GetBackground(RetainPtr<CFX_DIBitmap> pBuffer,
36                                        const CPDF_PageObject* pObj,
37                                        const CPDF_RenderOptions* pOptions,
38                                        const CFX_Matrix& mtFinal) {
39   CFX_DefaultRenderDevice device;
40   device.Attach(std::move(pBuffer));
41   device.FillRect(FX_RECT(0, 0, device.GetWidth(), device.GetHeight()),
42                   0xffffffff);
43   Render(&device, pObj, pOptions, &mtFinal);
44 }
45 
AppendLayer(CPDF_PageObjectHolder * pObjectHolder,const CFX_Matrix & mtObject2Device)46 void CPDF_RenderContext::AppendLayer(CPDF_PageObjectHolder* pObjectHolder,
47                                      const CFX_Matrix& mtObject2Device) {
48   m_Layers.emplace_back(pObjectHolder, mtObject2Device);
49 }
50 
Render(CFX_RenderDevice * pDevice,const CPDF_PageObject * pStopObj,const CPDF_RenderOptions * pOptions,const CFX_Matrix * pLastMatrix)51 void CPDF_RenderContext::Render(CFX_RenderDevice* pDevice,
52                                 const CPDF_PageObject* pStopObj,
53                                 const CPDF_RenderOptions* pOptions,
54                                 const CFX_Matrix* pLastMatrix) {
55   for (auto& layer : m_Layers) {
56     CFX_RenderDevice::StateRestorer restorer(pDevice);
57     CPDF_RenderStatus status(this, pDevice);
58     if (pOptions)
59       status.SetOptions(*pOptions);
60     status.SetStopObject(pStopObj);
61     status.SetTransparency(layer.GetObjectHolder()->GetTransparency());
62     CFX_Matrix final_matrix = layer.GetMatrix();
63     if (pLastMatrix) {
64       final_matrix *= *pLastMatrix;
65       status.SetDeviceMatrix(*pLastMatrix);
66     }
67     status.Initialize(nullptr, nullptr);
68     status.RenderObjectList(layer.GetObjectHolder(), final_matrix);
69     if (status.GetRenderOptions().GetOptions().bLimitedImageCache) {
70       m_pPageCache->CacheOptimization(
71           status.GetRenderOptions().GetCacheSizeLimit());
72     }
73     if (status.IsStopped())
74       break;
75   }
76 }
77 
Layer(CPDF_PageObjectHolder * pHolder,const CFX_Matrix & matrix)78 CPDF_RenderContext::Layer::Layer(CPDF_PageObjectHolder* pHolder,
79                                  const CFX_Matrix& matrix)
80     : m_pObjectHolder(pHolder), m_Matrix(matrix) {}
81 
82 CPDF_RenderContext::Layer::Layer(const Layer& that) = default;
83 
84 CPDF_RenderContext::Layer::~Layer() = default;
85