1 // Copyright 2020 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 "fpdfsdk/cpdfsdk_renderpage.h"
8
9 #include <memory>
10 #include <utility>
11
12 #include "build/build_config.h"
13 #include "core/fpdfapi/page/cpdf_pageimagecache.h"
14 #include "core/fpdfapi/render/cpdf_pagerendercontext.h"
15 #include "core/fpdfapi/render/cpdf_progressiverenderer.h"
16 #include "core/fpdfapi/render/cpdf_renderoptions.h"
17 #include "core/fpdfdoc/cpdf_annotlist.h"
18 #include "core/fxge/cfx_renderdevice.h"
19 #include "fpdfsdk/cpdfsdk_helpers.h"
20 #include "fpdfsdk/cpdfsdk_pauseadapter.h"
21
22 namespace {
23
RenderPageImpl(CPDF_PageRenderContext * pContext,CPDF_Page * pPage,const CFX_Matrix & matrix,const FX_RECT & clipping_rect,int flags,const FPDF_COLORSCHEME * color_scheme,bool need_to_restore,CPDFSDK_PauseAdapter * pause)24 void RenderPageImpl(CPDF_PageRenderContext* pContext,
25 CPDF_Page* pPage,
26 const CFX_Matrix& matrix,
27 const FX_RECT& clipping_rect,
28 int flags,
29 const FPDF_COLORSCHEME* color_scheme,
30 bool need_to_restore,
31 CPDFSDK_PauseAdapter* pause) {
32 if (!pContext->m_pOptions)
33 pContext->m_pOptions = std::make_unique<CPDF_RenderOptions>();
34
35 auto& options = pContext->m_pOptions->GetOptions();
36 options.bClearType = !!(flags & FPDF_LCD_TEXT);
37 options.bNoNativeText = !!(flags & FPDF_NO_NATIVETEXT);
38 options.bLimitedImageCache = !!(flags & FPDF_RENDER_LIMITEDIMAGECACHE);
39 options.bForceHalftone = !!(flags & FPDF_RENDER_FORCEHALFTONE);
40 options.bNoTextSmooth = !!(flags & FPDF_RENDER_NO_SMOOTHTEXT);
41 options.bNoImageSmooth = !!(flags & FPDF_RENDER_NO_SMOOTHIMAGE);
42 options.bNoPathSmooth = !!(flags & FPDF_RENDER_NO_SMOOTHPATH);
43
44 // Grayscale output
45 if (flags & FPDF_GRAYSCALE)
46 pContext->m_pOptions->SetColorMode(CPDF_RenderOptions::kGray);
47
48 if (color_scheme) {
49 pContext->m_pOptions->SetColorMode(CPDF_RenderOptions::kForcedColor);
50 SetColorFromScheme(color_scheme, pContext->m_pOptions.get());
51 options.bConvertFillToStroke = !!(flags & FPDF_CONVERT_FILL_TO_STROKE);
52 }
53
54 const CPDF_OCContext::UsageType usage =
55 (flags & FPDF_PRINTING) ? CPDF_OCContext::kPrint : CPDF_OCContext::kView;
56 pContext->m_pOptions->SetOCContext(
57 pdfium::MakeRetain<CPDF_OCContext>(pPage->GetDocument(), usage));
58
59 pContext->m_pDevice->SaveState();
60 pContext->m_pDevice->SetBaseClip(clipping_rect);
61 pContext->m_pDevice->SetClip_Rect(clipping_rect);
62 pContext->m_pContext = std::make_unique<CPDF_RenderContext>(
63 pPage->GetDocument(), pPage->GetMutablePageResources(),
64 pPage->GetPageImageCache());
65
66 pContext->m_pContext->AppendLayer(pPage, matrix);
67
68 if (flags & FPDF_ANNOT) {
69 auto pOwnedList = std::make_unique<CPDF_AnnotList>(pPage);
70 CPDF_AnnotList* pList = pOwnedList.get();
71 pContext->m_pAnnots = std::move(pOwnedList);
72 bool is_printing = (flags & FPDF_PRINTING);
73 #if BUILDFLAG(IS_WIN)
74 is_printing |= pContext->m_pDevice->GetDeviceType() == DeviceType::kPrinter;
75 #endif
76
77 // TODO(https://crbug.com/pdfium/993) - maybe pass true here.
78 const bool bShowWidget = false;
79 pList->DisplayAnnots(pContext->m_pContext.get(), is_printing, matrix,
80 bShowWidget);
81 }
82
83 pContext->m_pRenderer = std::make_unique<CPDF_ProgressiveRenderer>(
84 pContext->m_pContext.get(), pContext->m_pDevice.get(),
85 pContext->m_pOptions.get());
86 pContext->m_pRenderer->Start(pause);
87 if (need_to_restore)
88 pContext->m_pDevice->RestoreState(false);
89 }
90
91 } // namespace
92
CPDFSDK_RenderPage(CPDF_PageRenderContext * pContext,CPDF_Page * pPage,const CFX_Matrix & matrix,const FX_RECT & clipping_rect,int flags,const FPDF_COLORSCHEME * color_scheme)93 void CPDFSDK_RenderPage(CPDF_PageRenderContext* pContext,
94 CPDF_Page* pPage,
95 const CFX_Matrix& matrix,
96 const FX_RECT& clipping_rect,
97 int flags,
98 const FPDF_COLORSCHEME* color_scheme) {
99 RenderPageImpl(pContext, pPage, matrix, clipping_rect, flags, color_scheme,
100 /*need_to_restore=*/true, /*pause=*/nullptr);
101 }
102
CPDFSDK_RenderPageWithContext(CPDF_PageRenderContext * pContext,CPDF_Page * pPage,int start_x,int start_y,int size_x,int size_y,int rotate,int flags,const FPDF_COLORSCHEME * color_scheme,bool need_to_restore,CPDFSDK_PauseAdapter * pause)103 void CPDFSDK_RenderPageWithContext(CPDF_PageRenderContext* pContext,
104 CPDF_Page* pPage,
105 int start_x,
106 int start_y,
107 int size_x,
108 int size_y,
109 int rotate,
110 int flags,
111 const FPDF_COLORSCHEME* color_scheme,
112 bool need_to_restore,
113 CPDFSDK_PauseAdapter* pause) {
114 const FX_RECT rect(start_x, start_y, start_x + size_x, start_y + size_y);
115 RenderPageImpl(pContext, pPage, pPage->GetDisplayMatrix(rect, rotate), rect,
116 flags, color_scheme, need_to_restore, pause);
117 }
118