// Copyright 2014 PDFium Authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com #include "public/fpdf_progressive.h" #include <utility> #include "core/fpdfapi/cpdf_pagerendercontext.h" #include "core/fpdfapi/page/cpdf_page.h" #include "core/fpdfapi/render/cpdf_progressiverenderer.h" #include "core/fxcrt/fx_memory.h" #include "core/fxge/cfx_fxgedevice.h" #include "core/fxge/cfx_renderdevice.h" #include "fpdfsdk/fsdk_define.h" #include "fpdfsdk/fsdk_pauseadapter.h" #include "public/fpdfview.h" #include "third_party/base/ptr_util.h" // These checks are here because core/ and public/ cannot depend on each other. static_assert(CPDF_ProgressiveRenderer::Ready == FPDF_RENDER_READER, "CPDF_ProgressiveRenderer::Ready value mismatch"); static_assert(CPDF_ProgressiveRenderer::ToBeContinued == FPDF_RENDER_TOBECOUNTINUED, "CPDF_ProgressiveRenderer::ToBeContinued value mismatch"); static_assert(CPDF_ProgressiveRenderer::Done == FPDF_RENDER_DONE, "CPDF_ProgressiveRenderer::Done value mismatch"); static_assert(CPDF_ProgressiveRenderer::Failed == FPDF_RENDER_FAILED, "CPDF_ProgressiveRenderer::Failed value mismatch"); DLLEXPORT int STDCALL 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) { if (!bitmap || !pause || pause->version != 1) return FPDF_RENDER_FAILED; CPDF_Page* pPage = CPDFPageFromFPDFPage(page); if (!pPage) return FPDF_RENDER_FAILED; auto pOwnedContext = pdfium::MakeUnique<CPDF_PageRenderContext>(); CPDF_PageRenderContext* pContext = pOwnedContext.get(); pPage->SetRenderContext(std::move(pOwnedContext)); CFX_RetainPtr<CFX_DIBitmap> pBitmap(CFXBitmapFromFPDFBitmap(bitmap)); auto pOwnedDevice = pdfium::MakeUnique<CFX_FxgeDevice>(); CFX_FxgeDevice* pDevice = pOwnedDevice.get(); pContext->m_pDevice = std::move(pOwnedDevice); pDevice->Attach(pBitmap, !!(flags & FPDF_REVERSE_BYTE_ORDER), nullptr, false); IFSDK_PAUSE_Adapter IPauseAdapter(pause); FPDF_RenderPage_Retail(pContext, page, start_x, start_y, size_x, size_y, rotate, flags, false, &IPauseAdapter); if (pContext->m_pRenderer) { return CPDF_ProgressiveRenderer::ToFPDFStatus( pContext->m_pRenderer->GetStatus()); } return FPDF_RENDER_FAILED; } DLLEXPORT int STDCALL FPDF_RenderPage_Continue(FPDF_PAGE page, IFSDK_PAUSE* pause) { if (!pause || pause->version != 1) return FPDF_RENDER_FAILED; CPDF_Page* pPage = CPDFPageFromFPDFPage(page); if (!pPage) return FPDF_RENDER_FAILED; CPDF_PageRenderContext* pContext = pPage->GetRenderContext(); if (pContext && pContext->m_pRenderer) { IFSDK_PAUSE_Adapter IPauseAdapter(pause); pContext->m_pRenderer->Continue(&IPauseAdapter); return CPDF_ProgressiveRenderer::ToFPDFStatus( pContext->m_pRenderer->GetStatus()); } return FPDF_RENDER_FAILED; } DLLEXPORT void STDCALL FPDF_RenderPage_Close(FPDF_PAGE page) { CPDF_Page* pPage = CPDFPageFromFPDFPage(page); if (!pPage) return; CPDF_PageRenderContext* pContext = pPage->GetRenderContext(); if (!pContext) return; pContext->m_pDevice->RestoreState(false); pPage->SetRenderContext(nullptr); }