1 // Copyright 2014 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 "public/fpdf_progressive.h" 8 9 #include "core/fpdfapi/cpdf_pagerendercontext.h" 10 #include "core/fpdfapi/page/cpdf_page.h" 11 #include "core/fpdfapi/render/cpdf_progressiverenderer.h" 12 #include "core/fxcrt/fx_memory.h" 13 #include "core/fxge/cfx_fxgedevice.h" 14 #include "core/fxge/cfx_renderdevice.h" 15 #include "fpdfsdk/fsdk_define.h" 16 #include "fpdfsdk/fsdk_pauseadapter.h" 17 #include "public/fpdfview.h" 18 #include "third_party/base/ptr_util.h" 19 20 // These checks are here because core/ and public/ cannot depend on each other. 21 static_assert(CPDF_ProgressiveRenderer::Ready == FPDF_RENDER_READER, 22 "CPDF_ProgressiveRenderer::Ready value mismatch"); 23 static_assert(CPDF_ProgressiveRenderer::ToBeContinued == 24 FPDF_RENDER_TOBECOUNTINUED, 25 "CPDF_ProgressiveRenderer::ToBeContinued value mismatch"); 26 static_assert(CPDF_ProgressiveRenderer::Done == FPDF_RENDER_DONE, 27 "CPDF_ProgressiveRenderer::Done value mismatch"); 28 static_assert(CPDF_ProgressiveRenderer::Failed == FPDF_RENDER_FAILED, 29 "CPDF_ProgressiveRenderer::Failed value mismatch"); 30 31 DLLEXPORT int STDCALL FPDF_RenderPageBitmap_Start(FPDF_BITMAP bitmap, 32 FPDF_PAGE page, 33 int start_x, 34 int start_y, 35 int size_x, 36 int size_y, 37 int rotate, 38 int flags, 39 IFSDK_PAUSE* pause) { 40 if (!bitmap || !pause || pause->version != 1) 41 return FPDF_RENDER_FAILED; 42 43 CPDF_Page* pPage = CPDFPageFromFPDFPage(page); 44 if (!pPage) 45 return FPDF_RENDER_FAILED; 46 47 CPDF_PageRenderContext* pContext = new CPDF_PageRenderContext; 48 pPage->SetRenderContext(pdfium::WrapUnique(pContext)); 49 CFX_FxgeDevice* pDevice = new CFX_FxgeDevice; 50 pContext->m_pDevice.reset(pDevice); 51 CFX_DIBitmap* pBitmap = CFXBitmapFromFPDFBitmap(bitmap); 52 pDevice->Attach(pBitmap, !!(flags & FPDF_REVERSE_BYTE_ORDER), nullptr, false); 53 54 IFSDK_PAUSE_Adapter IPauseAdapter(pause); 55 FPDF_RenderPage_Retail(pContext, page, start_x, start_y, size_x, size_y, 56 rotate, flags, false, &IPauseAdapter); 57 58 if (pContext->m_pRenderer) { 59 return CPDF_ProgressiveRenderer::ToFPDFStatus( 60 pContext->m_pRenderer->GetStatus()); 61 } 62 return FPDF_RENDER_FAILED; 63 } 64 65 DLLEXPORT int STDCALL FPDF_RenderPage_Continue(FPDF_PAGE page, 66 IFSDK_PAUSE* pause) { 67 if (!pause || pause->version != 1) 68 return FPDF_RENDER_FAILED; 69 70 CPDF_Page* pPage = CPDFPageFromFPDFPage(page); 71 if (!pPage) 72 return FPDF_RENDER_FAILED; 73 74 CPDF_PageRenderContext* pContext = pPage->GetRenderContext(); 75 if (pContext && pContext->m_pRenderer) { 76 IFSDK_PAUSE_Adapter IPauseAdapter(pause); 77 pContext->m_pRenderer->Continue(&IPauseAdapter); 78 return CPDF_ProgressiveRenderer::ToFPDFStatus( 79 pContext->m_pRenderer->GetStatus()); 80 } 81 return FPDF_RENDER_FAILED; 82 } 83 84 DLLEXPORT void STDCALL FPDF_RenderPage_Close(FPDF_PAGE page) { 85 CPDF_Page* pPage = CPDFPageFromFPDFPage(page); 86 if (!pPage) 87 return; 88 89 CPDF_PageRenderContext* pContext = pPage->GetRenderContext(); 90 if (!pContext) 91 return; 92 93 pContext->m_pDevice->RestoreState(false); 94 pPage->SetRenderContext(nullptr); 95 } 96
