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Diffstat (limited to 'fpdfsdk/fpdf_view.cpp')
| -rw-r--r-- | fpdfsdk/fpdf_view.cpp | 1159 |
1 files changed, 1159 insertions, 0 deletions
diff --git a/fpdfsdk/fpdf_view.cpp b/fpdfsdk/fpdf_view.cpp new file mode 100644 index 0000000000..a0877f38b5 --- /dev/null +++ b/fpdfsdk/fpdf_view.cpp @@ -0,0 +1,1159 @@ +// 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/fpdfview.h" + +#include <utility> +#include <vector> + +#include "core/fpdfapi/cpdf_modulemgr.h" +#include "core/fpdfapi/cpdf_pagerendercontext.h" +#include "core/fpdfapi/page/cpdf_page.h" +#include "core/fpdfapi/parser/cpdf_array.h" +#include "core/fpdfapi/parser/cpdf_dictionary.h" +#include "core/fpdfapi/parser/cpdf_document.h" +#include "core/fpdfapi/parser/cpdf_name.h" +#include "core/fpdfapi/parser/cpdf_parser.h" +#include "core/fpdfapi/parser/fpdf_parser_decode.h" +#include "core/fpdfapi/render/cpdf_progressiverenderer.h" +#include "core/fpdfapi/render/cpdf_rendercontext.h" +#include "core/fpdfapi/render/cpdf_renderoptions.h" +#include "core/fpdfdoc/cpdf_annotlist.h" +#include "core/fpdfdoc/cpdf_nametree.h" +#include "core/fpdfdoc/cpdf_occontext.h" +#include "core/fpdfdoc/cpdf_viewerpreferences.h" +#include "core/fxcrt/fx_stream.h" +#include "core/fxcrt/fx_system.h" +#include "core/fxge/cfx_defaultrenderdevice.h" +#include "core/fxge/cfx_gemodule.h" +#include "core/fxge/cfx_renderdevice.h" +#include "fpdfsdk/cpdfsdk_customaccess.h" +#include "fpdfsdk/cpdfsdk_formfillenvironment.h" +#include "fpdfsdk/cpdfsdk_helpers.h" +#include "fpdfsdk/cpdfsdk_memoryaccess.h" +#include "fpdfsdk/cpdfsdk_pageview.h" +#include "fpdfsdk/ipdfsdk_pauseadapter.h" +#include "fxjs/ijs_runtime.h" +#include "public/fpdf_formfill.h" +#include "third_party/base/ptr_util.h" + +#ifdef PDF_ENABLE_XFA +#include "fpdfsdk/fpdfxfa/cpdfxfa_context.h" +#include "fpdfsdk/fpdfxfa/cpdfxfa_page.h" +#include "fxbarcode/BC_Library.h" +#endif // PDF_ENABLE_XFA + +#if _FX_PLATFORM_ == _FX_PLATFORM_WINDOWS_ +#include "core/fxge/cfx_windowsrenderdevice.h" +#include "public/fpdf_edit.h" + +// These checks are here because core/ and public/ cannot depend on each other. +static_assert(WindowsPrintMode::kModeEmf == FPDF_PRINTMODE_EMF, + "WindowsPrintMode::kModeEmf value mismatch"); +static_assert(WindowsPrintMode::kModeTextOnly == FPDF_PRINTMODE_TEXTONLY, + "WindowsPrintMode::kModeTextOnly value mismatch"); +static_assert(WindowsPrintMode::kModePostScript2 == FPDF_PRINTMODE_POSTSCRIPT2, + "WindowsPrintMode::kModePostScript2 value mismatch"); +static_assert(WindowsPrintMode::kModePostScript3 == FPDF_PRINTMODE_POSTSCRIPT3, + "WindowsPrintMode::kModePostScript3 value mismatch"); +#endif + +namespace { + +bool g_bLibraryInitialized = false; + +void RenderPageImpl(CPDF_PageRenderContext* pContext, + CPDF_Page* pPage, + const CFX_Matrix& matrix, + const FX_RECT& clipping_rect, + int flags, + bool bNeedToRestore, + IPDFSDK_PauseAdapter* pause) { + if (!pContext->m_pOptions) + pContext->m_pOptions = pdfium::MakeUnique<CPDF_RenderOptions>(); + + uint32_t option_flags = pContext->m_pOptions->GetFlags(); + if (flags & FPDF_LCD_TEXT) + option_flags |= RENDER_CLEARTYPE; + else + option_flags &= ~RENDER_CLEARTYPE; + + if (flags & FPDF_NO_NATIVETEXT) + option_flags |= RENDER_NO_NATIVETEXT; + if (flags & FPDF_RENDER_LIMITEDIMAGECACHE) + option_flags |= RENDER_LIMITEDIMAGECACHE; + if (flags & FPDF_RENDER_FORCEHALFTONE) + option_flags |= RENDER_FORCE_HALFTONE; +#ifndef PDF_ENABLE_XFA + if (flags & FPDF_RENDER_NO_SMOOTHTEXT) + option_flags |= RENDER_NOTEXTSMOOTH; + if (flags & FPDF_RENDER_NO_SMOOTHIMAGE) + option_flags |= RENDER_NOIMAGESMOOTH; + if (flags & FPDF_RENDER_NO_SMOOTHPATH) + option_flags |= RENDER_NOPATHSMOOTH; +#endif // PDF_ENABLE_XFA + pContext->m_pOptions->SetFlags(option_flags); + + // Grayscale output + if (flags & FPDF_GRAYSCALE) + pContext->m_pOptions->SetColorMode(CPDF_RenderOptions::kGray); + + const CPDF_OCContext::UsageType usage = + (flags & FPDF_PRINTING) ? CPDF_OCContext::Print : CPDF_OCContext::View; + pContext->m_pOptions->SetOCContext( + pdfium::MakeRetain<CPDF_OCContext>(pPage->m_pDocument.Get(), usage)); + + pContext->m_pDevice->SaveState(); + pContext->m_pDevice->SetClip_Rect(clipping_rect); + pContext->m_pContext = pdfium::MakeUnique<CPDF_RenderContext>(pPage); + pContext->m_pContext->AppendLayer(pPage, &matrix); + + if (flags & FPDF_ANNOT) { + pContext->m_pAnnots = pdfium::MakeUnique<CPDF_AnnotList>(pPage); + bool bPrinting = pContext->m_pDevice->GetDeviceClass() != FXDC_DISPLAY; + pContext->m_pAnnots->DisplayAnnots(pPage, pContext->m_pContext.get(), + bPrinting, &matrix, false, nullptr); + } + + pContext->m_pRenderer = pdfium::MakeUnique<CPDF_ProgressiveRenderer>( + pContext->m_pContext.get(), pContext->m_pDevice.get(), + pContext->m_pOptions.get()); + pContext->m_pRenderer->Start(pause); + if (bNeedToRestore) + pContext->m_pDevice->RestoreState(false); +} + +FPDF_DOCUMENT LoadDocumentImpl( + const RetainPtr<IFX_SeekableReadStream>& pFileAccess, + FPDF_BYTESTRING password) { + if (!pFileAccess) { + ProcessParseError(CPDF_Parser::FILE_ERROR); + return nullptr; + } + + auto pParser = pdfium::MakeUnique<CPDF_Parser>(); + pParser->SetPassword(password); + + auto pDocument = pdfium::MakeUnique<CPDF_Document>(std::move(pParser)); + CPDF_Parser::Error error = + pDocument->GetParser()->StartParse(pFileAccess, pDocument.get()); + if (error != CPDF_Parser::SUCCESS) { + ProcessParseError(error); + return nullptr; + } + CheckUnSupportError(pDocument.get(), error); + return FPDFDocumentFromCPDFDocument(pDocument.release()); +} + +} // namespace + +FPDF_EXPORT void FPDF_CALLCONV FPDF_InitLibrary() { + FPDF_InitLibraryWithConfig(nullptr); +} + +FPDF_EXPORT void FPDF_CALLCONV +FPDF_InitLibraryWithConfig(const FPDF_LIBRARY_CONFIG* cfg) { + if (g_bLibraryInitialized) + return; + + FXMEM_InitializePartitionAlloc(); + + CFX_GEModule* pModule = CFX_GEModule::Get(); + pModule->Init(cfg ? cfg->m_pUserFontPaths : nullptr); + + CPDF_ModuleMgr* pModuleMgr = CPDF_ModuleMgr::Get(); + pModuleMgr->Init(); + +#ifdef PDF_ENABLE_XFA + BC_Library_Init(); +#endif // PDF_ENABLE_XFA + if (cfg && cfg->version >= 2) + IJS_Runtime::Initialize(cfg->m_v8EmbedderSlot, cfg->m_pIsolate); + + g_bLibraryInitialized = true; +} + +FPDF_EXPORT void FPDF_CALLCONV FPDF_DestroyLibrary() { + if (!g_bLibraryInitialized) + return; + +#ifdef PDF_ENABLE_XFA + BC_Library_Destroy(); +#endif // PDF_ENABLE_XFA + + CPDF_ModuleMgr::Destroy(); + CFX_GEModule::Destroy(); + + IJS_Runtime::Destroy(); + + g_bLibraryInitialized = false; +} + +FPDF_EXPORT void FPDF_CALLCONV FPDF_SetSandBoxPolicy(FPDF_DWORD policy, + FPDF_BOOL enable) { + return FSDK_SetSandBoxPolicy(policy, enable); +} + +#if defined(_WIN32) +#if defined(PDFIUM_PRINT_TEXT_WITH_GDI) +FPDF_EXPORT void FPDF_CALLCONV +FPDF_SetTypefaceAccessibleFunc(PDFiumEnsureTypefaceCharactersAccessible func) { + g_pdfium_typeface_accessible_func = func; +} + +FPDF_EXPORT void FPDF_CALLCONV FPDF_SetPrintTextWithGDI(FPDF_BOOL use_gdi) { + g_pdfium_print_text_with_gdi = !!use_gdi; +} +#endif // PDFIUM_PRINT_TEXT_WITH_GDI + +FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV +FPDF_SetPrintPostscriptLevel(int postscript_level) { + return postscript_level != 1 && FPDF_SetPrintMode(postscript_level); +} + +FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FPDF_SetPrintMode(int mode) { + if (mode < FPDF_PRINTMODE_EMF || mode > FPDF_PRINTMODE_POSTSCRIPT3) + return FALSE; + g_pdfium_print_mode = mode; + return TRUE; +} +#endif // defined(_WIN32) + +FPDF_EXPORT FPDF_DOCUMENT FPDF_CALLCONV +FPDF_LoadDocument(FPDF_STRING file_path, FPDF_BYTESTRING password) { + // NOTE: the creation of the file needs to be by the embedder on the + // other side of this API. + return LoadDocumentImpl(IFX_SeekableReadStream::CreateFromFilename(file_path), + password); +} + +FPDF_EXPORT int FPDF_CALLCONV FPDF_GetFormType(FPDF_DOCUMENT document) { + const CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document); + if (!pDoc) + return FORMTYPE_NONE; + + const CPDF_Dictionary* pRoot = pDoc->GetRoot(); + if (!pRoot) + return FORMTYPE_NONE; + + CPDF_Dictionary* pAcroForm = pRoot->GetDictFor("AcroForm"); + if (!pAcroForm) + return FORMTYPE_NONE; + + CPDF_Object* pXFA = pAcroForm->GetObjectFor("XFA"); + if (!pXFA) + return FORMTYPE_ACRO_FORM; + + bool bNeedsRendering = pRoot->GetBooleanFor("NeedsRendering", false); + return bNeedsRendering ? FORMTYPE_XFA_FULL : FORMTYPE_XFA_FOREGROUND; +} + +#ifdef PDF_ENABLE_XFA +FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FPDF_LoadXFA(FPDF_DOCUMENT document) { + return document && static_cast<CPDFXFA_Context*>(document)->LoadXFADoc(); +} +#endif // PDF_ENABLE_XFA + +FPDF_EXPORT FPDF_DOCUMENT FPDF_CALLCONV +FPDF_LoadMemDocument(const void* data_buf, int size, FPDF_BYTESTRING password) { + return LoadDocumentImpl(pdfium::MakeRetain<CPDFSDK_MemoryAccess>( + static_cast<const uint8_t*>(data_buf), size), + password); +} + +FPDF_EXPORT FPDF_DOCUMENT FPDF_CALLCONV +FPDF_LoadCustomDocument(FPDF_FILEACCESS* pFileAccess, + FPDF_BYTESTRING password) { + return LoadDocumentImpl(pdfium::MakeRetain<CPDFSDK_CustomAccess>(pFileAccess), + password); +} + +FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FPDF_GetFileVersion(FPDF_DOCUMENT doc, + int* fileVersion) { + if (!fileVersion) + return false; + + *fileVersion = 0; + CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(doc); + if (!pDoc) + return false; + + const CPDF_Parser* pParser = pDoc->GetParser(); + if (!pParser) + return false; + + *fileVersion = pParser->GetFileVersion(); + return true; +} + +// jabdelmalek: changed return type from uint32_t to build on Linux (and match +// header). +FPDF_EXPORT unsigned long FPDF_CALLCONV +FPDF_GetDocPermissions(FPDF_DOCUMENT document) { + CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document); + // https://bugs.chromium.org/p/pdfium/issues/detail?id=499 + if (!pDoc) { +#ifndef PDF_ENABLE_XFA + return 0; +#else // PDF_ENABLE_XFA + return 0xFFFFFFFF; +#endif // PDF_ENABLE_XFA + } + + return pDoc->GetUserPermissions(); +} + +FPDF_EXPORT int FPDF_CALLCONV +FPDF_GetSecurityHandlerRevision(FPDF_DOCUMENT document) { + CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document); + if (!pDoc || !pDoc->GetParser()) + return -1; + + CPDF_Dictionary* pDict = pDoc->GetParser()->GetEncryptDict(); + return pDict ? pDict->GetIntegerFor("R") : -1; +} + +FPDF_EXPORT int FPDF_CALLCONV FPDF_GetPageCount(FPDF_DOCUMENT document) { + UnderlyingDocumentType* pDoc = UnderlyingFromFPDFDocument(document); + return pDoc ? pDoc->GetPageCount() : 0; +} + +FPDF_EXPORT FPDF_PAGE FPDF_CALLCONV FPDF_LoadPage(FPDF_DOCUMENT document, + int page_index) { + UnderlyingDocumentType* pDoc = UnderlyingFromFPDFDocument(document); + if (!pDoc) + return nullptr; + + if (page_index < 0 || page_index >= pDoc->GetPageCount()) + return nullptr; + +#ifdef PDF_ENABLE_XFA + return pDoc->GetXFAPage(page_index).Leak(); +#else // PDF_ENABLE_XFA + CPDF_Dictionary* pDict = pDoc->GetPage(page_index); + if (!pDict) + return nullptr; + + CPDF_Page* pPage = new CPDF_Page(pDoc, pDict, true); + pPage->ParseContent(); + return pPage; +#endif // PDF_ENABLE_XFA +} + +FPDF_EXPORT double FPDF_CALLCONV FPDF_GetPageWidth(FPDF_PAGE page) { + UnderlyingPageType* pPage = UnderlyingFromFPDFPage(page); + return pPage ? pPage->GetPageWidth() : 0.0; +} + +FPDF_EXPORT double FPDF_CALLCONV FPDF_GetPageHeight(FPDF_PAGE page) { + UnderlyingPageType* pPage = UnderlyingFromFPDFPage(page); + return pPage ? pPage->GetPageHeight() : 0.0; +} + +FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FPDF_GetPageBoundingBox(FPDF_PAGE page, + FS_RECTF* rect) { + if (!rect) + return false; + + CPDF_Page* pPage = CPDFPageFromFPDFPage(page); + if (!pPage) + return false; + + FSRECTFFromCFXFloatRect(pPage->GetPageBBox(), rect); + return true; +} + +#if defined(_WIN32) +namespace { + +const double kEpsilonSize = 0.01f; + +void GetScaling(CPDF_Page* pPage, + int size_x, + int size_y, + int rotate, + double* scale_x, + double* scale_y) { + ASSERT(pPage); + ASSERT(scale_x); + ASSERT(scale_y); + double page_width = pPage->GetPageWidth(); + double page_height = pPage->GetPageHeight(); + if (page_width < kEpsilonSize || page_height < kEpsilonSize) + return; + + if (rotate % 2 == 0) { + *scale_x = size_x / page_width; + *scale_y = size_y / page_height; + } else { + *scale_x = size_y / page_width; + *scale_y = size_x / page_height; + } +} + +FX_RECT GetMaskDimensionsAndOffsets(CPDF_Page* pPage, + int start_x, + int start_y, + int size_x, + int size_y, + int rotate, + const CFX_FloatRect& mask_box) { + double scale_x = 0.0f; + double scale_y = 0.0f; + GetScaling(pPage, size_x, size_y, rotate, &scale_x, &scale_y); + if (scale_x < kEpsilonSize || scale_y < kEpsilonSize) + return FX_RECT(); + + // Compute sizes in page points. Round down to catch the entire bitmap. + int start_x_bm = static_cast<int>(mask_box.left * scale_x); + int start_y_bm = static_cast<int>(mask_box.bottom * scale_y); + int size_x_bm = static_cast<int>(mask_box.right * scale_x + 1.0f) - + static_cast<int>(mask_box.left * scale_x); + int size_y_bm = static_cast<int>(mask_box.top * scale_y + 1.0f) - + static_cast<int>(mask_box.bottom * scale_y); + + // Get page rotation + int page_rotation = pPage->GetPageRotation(); + + // Compute offsets + int offset_x = 0; + int offset_y = 0; + if (size_x > size_y) + std::swap(size_x_bm, size_y_bm); + + switch ((rotate + page_rotation) % 4) { + case 0: + offset_x = start_x_bm + start_x; + offset_y = start_y + size_y - size_y_bm - start_y_bm; + break; + case 1: + offset_x = start_y_bm + start_x; + offset_y = start_x_bm + start_y; + break; + case 2: + offset_x = start_x + size_x - size_x_bm - start_x_bm; + offset_y = start_y_bm + start_y; + break; + case 3: + offset_x = start_x + size_x - size_x_bm - start_y_bm; + offset_y = start_y + size_y - size_y_bm - start_x_bm; + break; + } + return FX_RECT(offset_x, offset_y, offset_x + size_x_bm, + offset_y + size_y_bm); +} + +// Get a bitmap of just the mask section defined by |mask_box| from a full page +// bitmap |pBitmap|. +RetainPtr<CFX_DIBitmap> GetMaskBitmap(CPDF_Page* pPage, + int start_x, + int start_y, + int size_x, + int size_y, + int rotate, + const RetainPtr<CFX_DIBitmap>& pSrc, + const CFX_FloatRect& mask_box, + FX_RECT* bitmap_area) { + ASSERT(bitmap_area); + *bitmap_area = GetMaskDimensionsAndOffsets(pPage, start_x, start_y, size_x, + size_y, rotate, mask_box); + if (bitmap_area->IsEmpty()) + return nullptr; + + // Create a new bitmap to transfer part of the page bitmap to. + RetainPtr<CFX_DIBitmap> pDst = pdfium::MakeRetain<CFX_DIBitmap>(); + pDst->Create(bitmap_area->Width(), bitmap_area->Height(), FXDIB_Argb); + pDst->Clear(0x00ffffff); + pDst->TransferBitmap(0, 0, bitmap_area->Width(), bitmap_area->Height(), pSrc, + bitmap_area->left, bitmap_area->top); + return pDst; +} + +void RenderBitmap(CFX_RenderDevice* device, + const RetainPtr<CFX_DIBitmap>& pSrc, + const FX_RECT& mask_area) { + int size_x_bm = mask_area.Width(); + int size_y_bm = mask_area.Height(); + if (size_x_bm == 0 || size_y_bm == 0) + return; + + // Create a new bitmap from the old one + RetainPtr<CFX_DIBitmap> pDst = pdfium::MakeRetain<CFX_DIBitmap>(); + pDst->Create(size_x_bm, size_y_bm, FXDIB_Rgb32); + pDst->Clear(0xffffffff); + pDst->CompositeBitmap(0, 0, size_x_bm, size_y_bm, pSrc, 0, 0, + FXDIB_BLEND_NORMAL, nullptr, false); + + if (device->GetDeviceCaps(FXDC_DEVICE_CLASS) == FXDC_PRINTER) { + device->StretchDIBits(pDst, mask_area.left, mask_area.top, size_x_bm, + size_y_bm); + } else { + device->SetDIBits(pDst, mask_area.left, mask_area.top); + } +} + +} // namespace + +FPDF_EXPORT void FPDF_CALLCONV FPDF_RenderPage(HDC dc, + FPDF_PAGE page, + int start_x, + int start_y, + int size_x, + int size_y, + int rotate, + int flags) { + CPDF_Page* pPage = CPDFPageFromFPDFPage(page); + if (!pPage) + return; + pPage->SetRenderContext(pdfium::MakeUnique<CPDF_PageRenderContext>()); + CPDF_PageRenderContext* pContext = pPage->GetRenderContext(); + + RetainPtr<CFX_DIBitmap> pBitmap; + // Don't render the full page to bitmap for a mask unless there are a lot + // of masks. Full page bitmaps result in large spool sizes, so they should + // only be used when necessary. For large numbers of masks, rendering each + // individually is inefficient and unlikely to significantly improve spool + // size. TODO (rbpotter): Find out why this still breaks printing for some + // PDFs (see crbug.com/777837). + const bool bEnableImageMasks = false; + const bool bNewBitmap = pPage->BackgroundAlphaNeeded() || + (pPage->HasImageMask() && !bEnableImageMasks) || + pPage->GetMaskBoundingBoxes().size() > 100; + const bool bHasMask = pPage->HasImageMask() && !bNewBitmap; + if (bNewBitmap || bHasMask) { + pBitmap = pdfium::MakeRetain<CFX_DIBitmap>(); + pBitmap->Create(size_x, size_y, FXDIB_Argb); + pBitmap->Clear(0x00ffffff); + CFX_DefaultRenderDevice* pDevice = new CFX_DefaultRenderDevice; + pContext->m_pDevice = pdfium::WrapUnique(pDevice); + pDevice->Attach(pBitmap, false, nullptr, false); + if (bHasMask) { + pContext->m_pOptions = pdfium::MakeUnique<CPDF_RenderOptions>(); + uint32_t option_flags = pContext->m_pOptions->GetFlags(); + option_flags |= RENDER_BREAKFORMASKS; + pContext->m_pOptions->SetFlags(option_flags); + } + } else { + pContext->m_pDevice = pdfium::MakeUnique<CFX_WindowsRenderDevice>(dc); + } + + FPDF_RenderPage_Retail(pContext, page, start_x, start_y, size_x, size_y, + rotate, flags, true, nullptr); + + if (bHasMask) { + // Finish rendering the page to bitmap and copy the correct segments + // of the page to individual image mask bitmaps. + const std::vector<CFX_FloatRect>& mask_boxes = + pPage->GetMaskBoundingBoxes(); + std::vector<FX_RECT> bitmap_areas(mask_boxes.size()); + std::vector<RetainPtr<CFX_DIBitmap>> bitmaps(mask_boxes.size()); + for (size_t i = 0; i < mask_boxes.size(); i++) { + bitmaps[i] = + GetMaskBitmap(pPage, start_x, start_y, size_x, size_y, rotate, + pBitmap, mask_boxes[i], &bitmap_areas[i]); + pContext->m_pRenderer->Continue(nullptr); + } + + // Reset rendering context + pPage->SetRenderContext(nullptr); + + // Begin rendering to the printer. Add flag to indicate the renderer should + // pause after each image mask. + pPage->SetRenderContext(pdfium::MakeUnique<CPDF_PageRenderContext>()); + pContext = pPage->GetRenderContext(); + pContext->m_pDevice = pdfium::MakeUnique<CFX_WindowsRenderDevice>(dc); + pContext->m_pOptions = pdfium::MakeUnique<CPDF_RenderOptions>(); + + uint32_t option_flags = pContext->m_pOptions->GetFlags(); + option_flags |= RENDER_BREAKFORMASKS; + pContext->m_pOptions->SetFlags(option_flags); + + FPDF_RenderPage_Retail(pContext, page, start_x, start_y, size_x, size_y, + rotate, flags, true, nullptr); + + // Render masks + for (size_t i = 0; i < mask_boxes.size(); i++) { + // Render the bitmap for the mask and free the bitmap. + if (bitmaps[i]) { // will be null if mask has zero area + RenderBitmap(pContext->m_pDevice.get(), bitmaps[i], bitmap_areas[i]); + } + // Render the next portion of page. + pContext->m_pRenderer->Continue(nullptr); + } + } else if (bNewBitmap) { + CFX_WindowsRenderDevice WinDC(dc); + if (WinDC.GetDeviceCaps(FXDC_DEVICE_CLASS) == FXDC_PRINTER) { + auto pDst = pdfium::MakeRetain<CFX_DIBitmap>(); + int pitch = pBitmap->GetPitch(); + pDst->Create(size_x, size_y, FXDIB_Rgb32); + memset(pDst->GetBuffer(), -1, pitch * size_y); + pDst->CompositeBitmap(0, 0, size_x, size_y, pBitmap, 0, 0, + FXDIB_BLEND_NORMAL, nullptr, false); + WinDC.StretchDIBits(pDst, 0, 0, size_x, size_y); + } else { + WinDC.SetDIBits(pBitmap, 0, 0); + } + } + + pPage->SetRenderContext(nullptr); +} +#endif // defined(_WIN32) + +FPDF_EXPORT void FPDF_CALLCONV FPDF_RenderPageBitmap(FPDF_BITMAP bitmap, + FPDF_PAGE page, + int start_x, + int start_y, + int size_x, + int size_y, + int rotate, + int flags) { + if (!bitmap) + return; + + CPDF_Page* pPage = CPDFPageFromFPDFPage(page); + if (!pPage) + return; + + CPDF_PageRenderContext* pContext = new CPDF_PageRenderContext; + pPage->SetRenderContext(pdfium::WrapUnique(pContext)); + + CFX_DefaultRenderDevice* pDevice = new CFX_DefaultRenderDevice; + pContext->m_pDevice.reset(pDevice); + + RetainPtr<CFX_DIBitmap> pBitmap(CFXBitmapFromFPDFBitmap(bitmap)); + pDevice->Attach(pBitmap, !!(flags & FPDF_REVERSE_BYTE_ORDER), nullptr, false); + FPDF_RenderPage_Retail(pContext, page, start_x, start_y, size_x, size_y, + rotate, flags, true, nullptr); + +#ifdef _SKIA_SUPPORT_PATHS_ + pDevice->Flush(true); + pBitmap->UnPreMultiply(); +#endif + pPage->SetRenderContext(nullptr); +} + +FPDF_EXPORT void FPDF_CALLCONV +FPDF_RenderPageBitmapWithMatrix(FPDF_BITMAP bitmap, + FPDF_PAGE page, + const FS_MATRIX* matrix, + const FS_RECTF* clipping, + int flags) { + if (!bitmap) + return; + + CPDF_Page* pPage = CPDFPageFromFPDFPage(page); + if (!pPage) + return; + + CPDF_PageRenderContext* pContext = new CPDF_PageRenderContext; + pPage->SetRenderContext(pdfium::WrapUnique(pContext)); + + CFX_DefaultRenderDevice* pDevice = new CFX_DefaultRenderDevice; + pContext->m_pDevice.reset(pDevice); + + RetainPtr<CFX_DIBitmap> pBitmap(CFXBitmapFromFPDFBitmap(bitmap)); + pDevice->Attach(pBitmap, !!(flags & FPDF_REVERSE_BYTE_ORDER), nullptr, false); + + CFX_FloatRect clipping_rect; + if (clipping) + clipping_rect = CFXFloatRectFromFSRECTF(*clipping); + FX_RECT clip_rect = clipping_rect.ToFxRect(); + + CFX_Matrix transform_matrix = pPage->GetDisplayMatrix( + 0, 0, pPage->GetPageWidth(), pPage->GetPageHeight(), 0); + + if (matrix) { + transform_matrix.Concat(CFX_Matrix(matrix->a, matrix->b, matrix->c, + matrix->d, matrix->e, matrix->f)); + } + RenderPageImpl(pContext, pPage, transform_matrix, clip_rect, flags, true, + nullptr); + + pPage->SetRenderContext(nullptr); +} + +#ifdef _SKIA_SUPPORT_ +FPDF_EXPORT FPDF_RECORDER FPDF_CALLCONV FPDF_RenderPageSkp(FPDF_PAGE page, + int size_x, + int size_y) { + CPDF_Page* pPage = CPDFPageFromFPDFPage(page); + if (!pPage) + return nullptr; + + CPDF_PageRenderContext* pContext = new CPDF_PageRenderContext; + pPage->SetRenderContext(pdfium::WrapUnique(pContext)); + CFX_DefaultRenderDevice* skDevice = new CFX_DefaultRenderDevice; + FPDF_RECORDER recorder = skDevice->CreateRecorder(size_x, size_y); + pContext->m_pDevice.reset(skDevice); + FPDF_RenderPage_Retail(pContext, page, 0, 0, size_x, size_y, 0, 0, true, + nullptr); + pPage->SetRenderContext(nullptr); + return recorder; +} +#endif + +FPDF_EXPORT void FPDF_CALLCONV FPDF_ClosePage(FPDF_PAGE page) { + UnderlyingPageType* pPage = UnderlyingFromFPDFPage(page); + if (!page) + return; +#ifdef PDF_ENABLE_XFA + // Take it back across the API and throw it away. + RetainPtr<CPDFXFA_Page>().Unleak(pPage); +#else // PDF_ENABLE_XFA + CPDFSDK_PageView* pPageView = + static_cast<CPDFSDK_PageView*>(pPage->GetView()); + if (pPageView) { + // We're already destroying the pageview, so bail early. + if (pPageView->IsBeingDestroyed()) + return; + + if (pPageView->IsLocked()) { + pPageView->TakePageOwnership(); + return; + } + + bool owned = pPageView->OwnsPage(); + // This will delete the |pPageView| object. We must cleanup the PageView + // first because it will attempt to reset the View on the |pPage| during + // destruction. + pPageView->GetFormFillEnv()->RemovePageView(pPage); + // If the page was owned then the pageview will have deleted the page. + if (owned) + return; + } + delete pPage; +#endif // PDF_ENABLE_XFA +} + +FPDF_EXPORT void FPDF_CALLCONV FPDF_CloseDocument(FPDF_DOCUMENT document) { + delete UnderlyingFromFPDFDocument(document); +} + +FPDF_EXPORT unsigned long FPDF_CALLCONV FPDF_GetLastError() { + return GetLastError(); +} + +FPDF_EXPORT void FPDF_CALLCONV FPDF_DeviceToPage(FPDF_PAGE page, + int start_x, + int start_y, + int size_x, + int size_y, + int rotate, + int device_x, + int device_y, + double* page_x, + double* page_y) { + if (!page || !page_x || !page_y) + return; + UnderlyingPageType* pPage = UnderlyingFromFPDFPage(page); +#ifdef PDF_ENABLE_XFA + pPage->DeviceToPage(start_x, start_y, size_x, size_y, rotate, device_x, + device_y, page_x, page_y); +#else // PDF_ENABLE_XFA + CFX_Matrix page2device = + pPage->GetDisplayMatrix(start_x, start_y, size_x, size_y, rotate); + + CFX_PointF pos = page2device.GetInverse().Transform( + CFX_PointF(static_cast<float>(device_x), static_cast<float>(device_y))); + + *page_x = pos.x; + *page_y = pos.y; +#endif // PDF_ENABLE_XFA +} + +FPDF_EXPORT void FPDF_CALLCONV FPDF_PageToDevice(FPDF_PAGE page, + int start_x, + int start_y, + int size_x, + int size_y, + int rotate, + double page_x, + double page_y, + int* device_x, + int* device_y) { + if (!device_x || !device_y) + return; + UnderlyingPageType* pPage = UnderlyingFromFPDFPage(page); + if (!pPage) + return; +#ifdef PDF_ENABLE_XFA + pPage->PageToDevice(start_x, start_y, size_x, size_y, rotate, page_x, page_y, + device_x, device_y); +#else // PDF_ENABLE_XFA + CFX_Matrix page2device = + pPage->GetDisplayMatrix(start_x, start_y, size_x, size_y, rotate); + CFX_PointF pos = page2device.Transform( + CFX_PointF(static_cast<float>(page_x), static_cast<float>(page_y))); + + *device_x = FXSYS_round(pos.x); + *device_y = FXSYS_round(pos.y); +#endif // PDF_ENABLE_XFA +} + +FPDF_EXPORT FPDF_BITMAP FPDF_CALLCONV FPDFBitmap_Create(int width, + int height, + int alpha) { + auto pBitmap = pdfium::MakeRetain<CFX_DIBitmap>(); + if (!pBitmap->Create(width, height, alpha ? FXDIB_Argb : FXDIB_Rgb32)) + return nullptr; + + return pBitmap.Leak(); +} + +FPDF_EXPORT FPDF_BITMAP FPDF_CALLCONV FPDFBitmap_CreateEx(int width, + int height, + int format, + void* first_scan, + int stride) { + FXDIB_Format fx_format; + switch (format) { + case FPDFBitmap_Gray: + fx_format = FXDIB_8bppRgb; + break; + case FPDFBitmap_BGR: + fx_format = FXDIB_Rgb; + break; + case FPDFBitmap_BGRx: + fx_format = FXDIB_Rgb32; + break; + case FPDFBitmap_BGRA: + fx_format = FXDIB_Argb; + break; + default: + return nullptr; + } + auto pBitmap = pdfium::MakeRetain<CFX_DIBitmap>(); + pBitmap->Create(width, height, fx_format, static_cast<uint8_t*>(first_scan), + stride); + return pBitmap.Leak(); +} + +FPDF_EXPORT int FPDF_CALLCONV FPDFBitmap_GetFormat(FPDF_BITMAP bitmap) { + if (!bitmap) + return FPDFBitmap_Unknown; + + FXDIB_Format format = CFXBitmapFromFPDFBitmap(bitmap)->GetFormat(); + switch (format) { + case FXDIB_8bppRgb: + case FXDIB_8bppMask: + return FPDFBitmap_Gray; + case FXDIB_Rgb: + return FPDFBitmap_BGR; + case FXDIB_Rgb32: + return FPDFBitmap_BGRx; + case FXDIB_Argb: + return FPDFBitmap_BGRA; + default: + return FPDFBitmap_Unknown; + } +} + +FPDF_EXPORT void FPDF_CALLCONV FPDFBitmap_FillRect(FPDF_BITMAP bitmap, + int left, + int top, + int width, + int height, + FPDF_DWORD color) { + if (!bitmap) + return; + + CFX_DefaultRenderDevice device; + RetainPtr<CFX_DIBitmap> pBitmap(CFXBitmapFromFPDFBitmap(bitmap)); + device.Attach(pBitmap, false, nullptr, false); + if (!pBitmap->HasAlpha()) + color |= 0xFF000000; + FX_RECT rect(left, top, left + width, top + height); + device.FillRect(&rect, color); +} + +FPDF_EXPORT void* FPDF_CALLCONV FPDFBitmap_GetBuffer(FPDF_BITMAP bitmap) { + return bitmap ? CFXBitmapFromFPDFBitmap(bitmap)->GetBuffer() : nullptr; +} + +FPDF_EXPORT int FPDF_CALLCONV FPDFBitmap_GetWidth(FPDF_BITMAP bitmap) { + return bitmap ? CFXBitmapFromFPDFBitmap(bitmap)->GetWidth() : 0; +} + +FPDF_EXPORT int FPDF_CALLCONV FPDFBitmap_GetHeight(FPDF_BITMAP bitmap) { + return bitmap ? CFXBitmapFromFPDFBitmap(bitmap)->GetHeight() : 0; +} + +FPDF_EXPORT int FPDF_CALLCONV FPDFBitmap_GetStride(FPDF_BITMAP bitmap) { + return bitmap ? CFXBitmapFromFPDFBitmap(bitmap)->GetPitch() : 0; +} + +FPDF_EXPORT void FPDF_CALLCONV FPDFBitmap_Destroy(FPDF_BITMAP bitmap) { + RetainPtr<CFX_DIBitmap> destroyer; + destroyer.Unleak(CFXBitmapFromFPDFBitmap(bitmap)); +} + +void FPDF_RenderPage_Retail(CPDF_PageRenderContext* pContext, + FPDF_PAGE page, + int start_x, + int start_y, + int size_x, + int size_y, + int rotate, + int flags, + bool bNeedToRestore, + IPDFSDK_PauseAdapter* pause) { + CPDF_Page* pPage = CPDFPageFromFPDFPage(page); + if (!pPage) + return; + + RenderPageImpl( + pContext, pPage, + pPage->GetDisplayMatrix(start_x, start_y, size_x, size_y, rotate), + FX_RECT(start_x, start_y, start_x + size_x, start_y + size_y), flags, + bNeedToRestore, pause); +} + +FPDF_EXPORT int FPDF_CALLCONV FPDF_GetPageSizeByIndex(FPDF_DOCUMENT document, + int page_index, + double* width, + double* height) { + UnderlyingDocumentType* pDoc = UnderlyingFromFPDFDocument(document); + if (!pDoc) + return false; + +#ifdef PDF_ENABLE_XFA + int count = pDoc->GetPageCount(); + if (page_index < 0 || page_index >= count) + return false; + RetainPtr<CPDFXFA_Page> pPage = pDoc->GetXFAPage(page_index); + if (!pPage) + return false; + *width = pPage->GetPageWidth(); + *height = pPage->GetPageHeight(); +#else // PDF_ENABLE_XFA + CPDF_Dictionary* pDict = pDoc->GetPage(page_index); + if (!pDict) + return false; + + CPDF_Page page(pDoc, pDict, true); + *width = page.GetPageWidth(); + *height = page.GetPageHeight(); +#endif // PDF_ENABLE_XFA + + return true; +} + +FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV +FPDF_VIEWERREF_GetPrintScaling(FPDF_DOCUMENT document) { + CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document); + if (!pDoc) + return true; + CPDF_ViewerPreferences viewRef(pDoc); + return viewRef.PrintScaling(); +} + +FPDF_EXPORT int FPDF_CALLCONV +FPDF_VIEWERREF_GetNumCopies(FPDF_DOCUMENT document) { + CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document); + if (!pDoc) + return 1; + CPDF_ViewerPreferences viewRef(pDoc); + return viewRef.NumCopies(); +} + +FPDF_EXPORT FPDF_PAGERANGE FPDF_CALLCONV +FPDF_VIEWERREF_GetPrintPageRange(FPDF_DOCUMENT document) { + CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document); + if (!pDoc) + return nullptr; + CPDF_ViewerPreferences viewRef(pDoc); + return viewRef.PrintPageRange(); +} + +FPDF_EXPORT FPDF_DUPLEXTYPE FPDF_CALLCONV +FPDF_VIEWERREF_GetDuplex(FPDF_DOCUMENT document) { + CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document); + if (!pDoc) + return DuplexUndefined; + CPDF_ViewerPreferences viewRef(pDoc); + ByteString duplex = viewRef.Duplex(); + if ("Simplex" == duplex) + return Simplex; + if ("DuplexFlipShortEdge" == duplex) + return DuplexFlipShortEdge; + if ("DuplexFlipLongEdge" == duplex) + return DuplexFlipLongEdge; + return DuplexUndefined; +} + +FPDF_EXPORT unsigned long FPDF_CALLCONV +FPDF_VIEWERREF_GetName(FPDF_DOCUMENT document, + FPDF_BYTESTRING key, + char* buffer, + unsigned long length) { + CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document); + if (!pDoc) + return 0; + + CPDF_ViewerPreferences viewRef(pDoc); + ByteString bsVal; + if (!viewRef.GenericName(key, &bsVal)) + return 0; + + unsigned long dwStringLen = bsVal.GetLength() + 1; + if (buffer && length >= dwStringLen) + memcpy(buffer, bsVal.c_str(), dwStringLen); + return dwStringLen; +} + +FPDF_EXPORT FPDF_DWORD FPDF_CALLCONV +FPDF_CountNamedDests(FPDF_DOCUMENT document) { + CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document); + if (!pDoc) + return 0; + + const CPDF_Dictionary* pRoot = pDoc->GetRoot(); + if (!pRoot) + return 0; + + CPDF_NameTree nameTree(pDoc, "Dests"); + pdfium::base::CheckedNumeric<FPDF_DWORD> count = nameTree.GetCount(); + CPDF_Dictionary* pDest = pRoot->GetDictFor("Dests"); + if (pDest) + count += pDest->GetCount(); + + if (!count.IsValid()) + return 0; + + return count.ValueOrDie(); +} + +FPDF_EXPORT FPDF_DEST FPDF_CALLCONV +FPDF_GetNamedDestByName(FPDF_DOCUMENT document, FPDF_BYTESTRING name) { + if (!name || name[0] == 0) + return nullptr; + + CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document); + if (!pDoc) + return nullptr; + + CPDF_NameTree name_tree(pDoc, "Dests"); + return name_tree.LookupNamedDest(pDoc, PDF_DecodeText(ByteString(name))); +} + +#ifdef PDF_ENABLE_XFA +FPDF_EXPORT FPDF_RESULT FPDF_CALLCONV FPDF_BStr_Init(FPDF_BSTR* str) { + if (!str) + return -1; + + memset(str, 0, sizeof(FPDF_BSTR)); + return 0; +} + +FPDF_EXPORT FPDF_RESULT FPDF_CALLCONV FPDF_BStr_Set(FPDF_BSTR* str, + FPDF_LPCSTR bstr, + int length) { + if (!str || !bstr || !length) + return -1; + + if (length == -1) + length = strlen(bstr); + + if (length == 0) { + FPDF_BStr_Clear(str); + return 0; + } + + if (str->str && str->len < length) + str->str = FX_Realloc(char, str->str, length + 1); + else if (!str->str) + str->str = FX_Alloc(char, length + 1); + + str->str[length] = 0; + memcpy(str->str, bstr, length); + str->len = length; + + return 0; +} + +FPDF_EXPORT FPDF_RESULT FPDF_CALLCONV FPDF_BStr_Clear(FPDF_BSTR* str) { + if (!str) + return -1; + + if (str->str) { + FX_Free(str->str); + str->str = nullptr; + } + str->len = 0; + return 0; +} +#endif // PDF_ENABLE_XFA + +FPDF_EXPORT FPDF_DEST FPDF_CALLCONV FPDF_GetNamedDest(FPDF_DOCUMENT document, + int index, + void* buffer, + long* buflen) { + if (!buffer) + *buflen = 0; + + if (index < 0) + return nullptr; + + CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document); + if (!pDoc) + return nullptr; + + const CPDF_Dictionary* pRoot = pDoc->GetRoot(); + if (!pRoot) + return nullptr; + + CPDF_Object* pDestObj = nullptr; + WideString wsName; + CPDF_NameTree nameTree(pDoc, "Dests"); + int count = nameTree.GetCount(); + if (index >= count) { + CPDF_Dictionary* pDest = pRoot->GetDictFor("Dests"); + if (!pDest) + return nullptr; + + pdfium::base::CheckedNumeric<int> checked_count = count; + checked_count += pDest->GetCount(); + if (!checked_count.IsValid() || index >= checked_count.ValueOrDie()) + return nullptr; + + index -= count; + int i = 0; + ByteString bsName; + for (const auto& it : *pDest) { + bsName = it.first; + pDestObj = it.second.get(); + if (!pDestObj) + continue; + if (i == index) + break; + i++; + } + wsName = PDF_DecodeText(bsName); + } else { + pDestObj = nameTree.LookupValueAndName(index, &wsName); + } + if (!pDestObj) + return nullptr; + if (CPDF_Dictionary* pDict = pDestObj->AsDictionary()) { + pDestObj = pDict->GetArrayFor("D"); + if (!pDestObj) + return nullptr; + } + if (!pDestObj->IsArray()) + return nullptr; + + ByteString utf16Name = wsName.UTF16LE_Encode(); + int len = utf16Name.GetLength(); + if (!buffer) { + *buflen = len; + } else if (len <= *buflen) { + memcpy(buffer, utf16Name.c_str(), len); + *buflen = len; + } else { + *buflen = -1; + } + return (FPDF_DEST)pDestObj; +} |