1 // Copyright 2014 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 "public/fpdf_progressive.h"
8
9 #include <memory>
10 #include <utility>
11
12 #include "core/fpdfapi/page/cpdf_page.h"
13 #include "core/fpdfapi/render/cpdf_pagerendercontext.h"
14 #include "core/fpdfapi/render/cpdf_progressiverenderer.h"
15 #include "core/fxge/cfx_defaultrenderdevice.h"
16 #include "core/fxge/dib/cfx_dibitmap.h"
17 #include "fpdfsdk/cpdfsdk_helpers.h"
18 #include "fpdfsdk/cpdfsdk_pauseadapter.h"
19 #include "fpdfsdk/cpdfsdk_renderpage.h"
20 #include "public/fpdfview.h"
21
22 // These checks are here because core/ and public/ cannot depend on each other.
23 static_assert(CPDF_ProgressiveRenderer::kReady == FPDF_RENDER_READY,
24 "CPDF_ProgressiveRenderer::kReady value mismatch");
25 static_assert(CPDF_ProgressiveRenderer::kToBeContinued ==
26 FPDF_RENDER_TOBECONTINUED,
27 "CPDF_ProgressiveRenderer::kToBeContinued value mismatch");
28 static_assert(CPDF_ProgressiveRenderer::kDone == FPDF_RENDER_DONE,
29 "CPDF_ProgressiveRenderer::kDone value mismatch");
30 static_assert(CPDF_ProgressiveRenderer::kFailed == FPDF_RENDER_FAILED,
31 "CPDF_ProgressiveRenderer::kFailed value mismatch");
32
33 namespace {
34
ToFPDFStatus(CPDF_ProgressiveRenderer::Status status)35 int ToFPDFStatus(CPDF_ProgressiveRenderer::Status status) {
36 return static_cast<int>(status);
37 }
38
39 } // namespace
40
41 FPDF_EXPORT int FPDF_CALLCONV
FPDF_RenderPageBitmapWithColorScheme_Start(FPDF_BITMAP bitmap,FPDF_PAGE page,int start_x,int start_y,int size_x,int size_y,int rotate,int flags,const FPDF_COLORSCHEME * color_scheme,IFSDK_PAUSE * pause)42 FPDF_RenderPageBitmapWithColorScheme_Start(FPDF_BITMAP bitmap,
43 FPDF_PAGE page,
44 int start_x,
45 int start_y,
46 int size_x,
47 int size_y,
48 int rotate,
49 int flags,
50 const FPDF_COLORSCHEME* color_scheme,
51 IFSDK_PAUSE* pause) {
52 if (!bitmap || !pause || pause->version != 1)
53 return FPDF_RENDER_FAILED;
54
55 CPDF_Page* pPage = CPDFPageFromFPDFPage(page);
56 if (!pPage)
57 return FPDF_RENDER_FAILED;
58
59 auto owned_context = std::make_unique<CPDF_PageRenderContext>();
60 CPDF_PageRenderContext* context = owned_context.get();
61 pPage->SetRenderContext(std::move(owned_context));
62
63 RetainPtr<CFX_DIBitmap> pBitmap(CFXDIBitmapFromFPDFBitmap(bitmap));
64 auto device = std::make_unique<CFX_DefaultRenderDevice>();
65 device->AttachWithRgbByteOrder(pBitmap, !!(flags & FPDF_REVERSE_BYTE_ORDER));
66 context->m_pDevice = std::move(device);
67
68 CPDFSDK_PauseAdapter pause_adapter(pause);
69 CPDFSDK_RenderPageWithContext(context, pPage, start_x, start_y, size_x,
70 size_y, rotate, flags, color_scheme,
71 /*need_to_restore=*/false, &pause_adapter);
72
73 #if defined(_SKIA_SUPPORT_)
74 if (CFX_DefaultRenderDevice::SkiaIsDefaultRenderer()) {
75 pBitmap->UnPreMultiply();
76 }
77 #endif // defined(_SKIA_SUPPORT_)
78
79 if (!context->m_pRenderer) {
80 return FPDF_RENDER_FAILED;
81 }
82
83 return ToFPDFStatus(context->m_pRenderer->GetStatus());
84 }
85
FPDF_RenderPageBitmap_Start(FPDF_BITMAP bitmap,FPDF_PAGE page,int start_x,int start_y,int size_x,int size_y,int rotate,int flags,IFSDK_PAUSE * pause)86 FPDF_EXPORT int FPDF_CALLCONV FPDF_RenderPageBitmap_Start(FPDF_BITMAP bitmap,
87 FPDF_PAGE page,
88 int start_x,
89 int start_y,
90 int size_x,
91 int size_y,
92 int rotate,
93 int flags,
94 IFSDK_PAUSE* pause) {
95 return FPDF_RenderPageBitmapWithColorScheme_Start(
96 bitmap, page, start_x, start_y, size_x, size_y, rotate, flags,
97 /*color_scheme=*/nullptr, pause);
98 }
99
FPDF_RenderPage_Continue(FPDF_PAGE page,IFSDK_PAUSE * pause)100 FPDF_EXPORT int FPDF_CALLCONV FPDF_RenderPage_Continue(FPDF_PAGE page,
101 IFSDK_PAUSE* pause) {
102 if (!pause || pause->version != 1)
103 return FPDF_RENDER_FAILED;
104
105 CPDF_Page* pPage = CPDFPageFromFPDFPage(page);
106 if (!pPage)
107 return FPDF_RENDER_FAILED;
108
109 auto* pContext =
110 static_cast<CPDF_PageRenderContext*>(pPage->GetRenderContext());
111 if (!pContext || !pContext->m_pRenderer)
112 return FPDF_RENDER_FAILED;
113
114 CPDFSDK_PauseAdapter pause_adapter(pause);
115 pContext->m_pRenderer->Continue(&pause_adapter);
116
117 #if defined(_SKIA_SUPPORT_)
118 if (CFX_DefaultRenderDevice::SkiaIsDefaultRenderer()) {
119 pContext->m_pDevice->GetBitmap()->UnPreMultiply();
120 }
121 #endif // defined(_SKIA_SUPPORT_)
122 return ToFPDFStatus(pContext->m_pRenderer->GetStatus());
123 }
124
FPDF_RenderPage_Close(FPDF_PAGE page)125 FPDF_EXPORT void FPDF_CALLCONV FPDF_RenderPage_Close(FPDF_PAGE page) {
126 CPDF_Page* pPage = CPDFPageFromFPDFPage(page);
127 if (pPage)
128 pPage->ClearRenderContext();
129 }
130