| // 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 <memory> |
| #include <utility> |
| #include <vector> |
| |
| #include "build/build_config.h" |
| #include "core/fpdfapi/page/cpdf_docpagedata.h" |
| #include "core/fpdfapi/page/cpdf_occontext.h" |
| #include "core/fpdfapi/page/cpdf_page.h" |
| #include "core/fpdfapi/page/cpdf_pagemodule.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/cpdf_stream.h" |
| #include "core/fpdfapi/parser/cpdf_string.h" |
| #include "core/fpdfapi/parser/cpdf_syntax_parser.h" |
| #include "core/fpdfapi/parser/fpdf_parser_decode.h" |
| #include "core/fpdfapi/render/cpdf_docrenderdata.h" |
| #include "core/fpdfapi/render/cpdf_pagerendercache.h" |
| #include "core/fpdfapi/render/cpdf_pagerendercontext.h" |
| #include "core/fpdfapi/render/cpdf_rendercontext.h" |
| #include "core/fpdfapi/render/cpdf_renderoptions.h" |
| #include "core/fpdfdoc/cpdf_nametree.h" |
| #include "core/fpdfdoc/cpdf_viewerpreferences.h" |
| #include "core/fxcrt/cfx_read_only_span_stream.h" |
| #include "core/fxcrt/fx_safe_types.h" |
| #include "core/fxcrt/fx_stream.h" |
| #include "core/fxcrt/fx_system.h" |
| #include "core/fxcrt/stl_util.h" |
| #include "core/fxcrt/unowned_ptr.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_pageview.h" |
| #include "fpdfsdk/cpdfsdk_renderpage.h" |
| #include "fxjs/ijs_runtime.h" |
| #include "public/fpdf_formfill.h" |
| #include "third_party/base/check_op.h" |
| #include "third_party/base/numerics/safe_conversions.h" |
| #include "third_party/base/ptr_util.h" |
| #include "third_party/base/span.h" |
| |
| #ifdef PDF_ENABLE_V8 |
| #include "fxjs/cfx_v8_array_buffer_allocator.h" |
| #include "third_party/base/no_destructor.h" |
| #endif |
| |
| #ifdef PDF_ENABLE_XFA |
| #include "fpdfsdk/fpdfxfa/cpdfxfa_context.h" |
| #include "fpdfsdk/fpdfxfa/cpdfxfa_page.h" |
| #endif // PDF_ENABLE_XFA |
| |
| #if BUILDFLAG(IS_WIN) |
| #include "core/fpdfapi/render/cpdf_progressiverenderer.h" |
| #include "core/fpdfapi/render/cpdf_windowsrenderdevice.h" |
| #include "public/fpdf_edit.h" |
| |
| // These checks are here because core/ and public/ cannot depend on each other. |
| static_assert(static_cast<int>(WindowsPrintMode::kEmf) == FPDF_PRINTMODE_EMF, |
| "WindowsPrintMode::kEmf value mismatch"); |
| static_assert(static_cast<int>(WindowsPrintMode::kTextOnly) == |
| FPDF_PRINTMODE_TEXTONLY, |
| "WindowsPrintMode::kTextOnly value mismatch"); |
| static_assert(static_cast<int>(WindowsPrintMode::kPostScript2) == |
| FPDF_PRINTMODE_POSTSCRIPT2, |
| "WindowsPrintMode::kPostScript2 value mismatch"); |
| static_assert(static_cast<int>(WindowsPrintMode::kPostScript3) == |
| FPDF_PRINTMODE_POSTSCRIPT3, |
| "WindowsPrintMode::kPostScript3 value mismatch"); |
| static_assert(static_cast<int>(WindowsPrintMode::kPostScript2PassThrough) == |
| FPDF_PRINTMODE_POSTSCRIPT2_PASSTHROUGH, |
| "WindowsPrintMode::kPostScript2PassThrough value mismatch"); |
| static_assert(static_cast<int>(WindowsPrintMode::kPostScript3PassThrough) == |
| FPDF_PRINTMODE_POSTSCRIPT3_PASSTHROUGH, |
| "WindowsPrintMode::kPostScript3PassThrough value mismatch"); |
| static_assert(static_cast<int>(WindowsPrintMode::kEmfImageMasks) == |
| FPDF_PRINTMODE_EMF_IMAGE_MASKS, |
| "WindowsPrintMode::kEmfImageMasks value mismatch"); |
| static_assert(static_cast<int>(WindowsPrintMode::kPostScript3Type42) == |
| FPDF_PRINTMODE_POSTSCRIPT3_TYPE42, |
| "WindowsPrintMode::kPostScript3Type42 value mismatch"); |
| static_assert( |
| static_cast<int>(WindowsPrintMode::kPostScript3Type42PassThrough) == |
| FPDF_PRINTMODE_POSTSCRIPT3_TYPE42_PASSTHROUGH, |
| "WindowsPrintMode::kPostScript3Type42PassThrough value mismatch"); |
| #endif // BUILDFLAG(IS_WIN) |
| |
| #if defined(_SKIA_SUPPORT_) |
| // These checks are here because core/ and public/ cannot depend on each other. |
| static_assert(static_cast<int>(CFX_DefaultRenderDevice::RendererType::kAgg) == |
| FPDF_RENDERERTYPE_AGG, |
| "CFX_DefaultRenderDevice::RendererType::kAGG value mismatch"); |
| static_assert(static_cast<int>(CFX_DefaultRenderDevice::RendererType::kSkia) == |
| FPDF_RENDERERTYPE_SKIA, |
| "CFX_DefaultRenderDevice::RendererType::kSkia value mismatch"); |
| #endif // defined(_SKIA_SUPPORT_) |
| |
| namespace { |
| |
| bool g_bLibraryInitialized = false; |
| |
| void UseRendererType(FPDF_RENDERER_TYPE public_type) { |
| // Internal definition of renderer types must stay updated with respect to |
| // the public definition, such that all public definitions can be mapped to |
| // an internal definition in `CFX_DefaultRenderDevice`. A public definition |
| // value might not be meaningful for a particular build configuration, which |
| // would mean use of that value is an error for that build. |
| |
| // AGG is always present in a build. |FPDF_RENDERERTYPE_SKIA| is valid to use |
| // only if it is included in the build. |
| #if defined(_SKIA_SUPPORT_) |
| // This build configuration has the option for runtime renderer selection. |
| if (public_type == FPDF_RENDERERTYPE_AGG || |
| public_type == FPDF_RENDERERTYPE_SKIA) { |
| CFX_DefaultRenderDevice::SetDefaultRenderer( |
| static_cast<CFX_DefaultRenderDevice::RendererType>(public_type)); |
| return; |
| } |
| CHECK(false); |
| #else |
| // `FPDF_RENDERERTYPE_AGG` is used for fully AGG builds as well as for the |
| // _SKIA_SUPPORT_PATHS_ build configuration. |
| CHECK_EQ(public_type, FPDF_RENDERERTYPE_AGG); |
| #endif |
| } |
| |
| const CPDF_Object* GetXFAEntryFromDocument(const CPDF_Document* doc) { |
| const CPDF_Dictionary* root = doc->GetRoot(); |
| if (!root) |
| return nullptr; |
| |
| // TODO(tsepez): return retained objects. |
| RetainPtr<const CPDF_Dictionary> acro_form = root->GetDictFor("AcroForm"); |
| return acro_form ? acro_form->GetObjectFor("XFA").Get() : nullptr; |
| } |
| |
| struct XFAPacket { |
| ByteString name; |
| const CPDF_Stream* data; |
| }; |
| |
| std::vector<XFAPacket> GetXFAPackets(const CPDF_Object* xfa_object) { |
| std::vector<XFAPacket> packets; |
| |
| if (!xfa_object) |
| return packets; |
| |
| RetainPtr<const CPDF_Stream> xfa_stream = ToStream(xfa_object->GetDirect()); |
| if (xfa_stream) { |
| // TODO(tsepez): push retained objects. |
| packets.push_back({"", xfa_stream.Get()}); |
| return packets; |
| } |
| |
| RetainPtr<const CPDF_Array> xfa_array = ToArray(xfa_object->GetDirect()); |
| if (!xfa_array) |
| return packets; |
| |
| packets.reserve(1 + (xfa_array->size() / 2)); |
| for (size_t i = 0; i < xfa_array->size(); i += 2) { |
| if (i + 1 == xfa_array->size()) |
| break; |
| |
| RetainPtr<const CPDF_String> name = xfa_array->GetStringAt(i); |
| if (!name) |
| continue; |
| |
| RetainPtr<const CPDF_Stream> data = xfa_array->GetStreamAt(i + 1); |
| if (!data) |
| continue; |
| |
| // TODO(tsepez): push retained objects. |
| packets.push_back({name->GetString(), data.Get()}); |
| } |
| return packets; |
| } |
| |
| FPDF_DOCUMENT LoadDocumentImpl( |
| const RetainPtr<IFX_SeekableReadStream>& pFileAccess, |
| FPDF_BYTESTRING password) { |
| if (!pFileAccess) { |
| ProcessParseError(CPDF_Parser::FILE_ERROR); |
| return nullptr; |
| } |
| |
| auto pDocument = |
| std::make_unique<CPDF_Document>(std::make_unique<CPDF_DocRenderData>(), |
| std::make_unique<CPDF_DocPageData>()); |
| |
| CPDF_Parser::Error error = pDocument->LoadDoc(pFileAccess, password); |
| if (error != CPDF_Parser::SUCCESS) { |
| ProcessParseError(error); |
| return nullptr; |
| } |
| |
| ReportUnsupportedFeatures(pDocument.get()); |
| 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* config) { |
| if (g_bLibraryInitialized) |
| return; |
| |
| FX_InitializeMemoryAllocators(); |
| CFX_GEModule::Create(config ? config->m_pUserFontPaths : nullptr); |
| CPDF_PageModule::Create(); |
| |
| #ifdef PDF_ENABLE_XFA |
| CPDFXFA_ModuleInit(); |
| #endif // PDF_ENABLE_XFA |
| |
| if (config && config->version >= 2) { |
| void* platform = config->version >= 3 ? config->m_pPlatform : nullptr; |
| IJS_Runtime::Initialize(config->m_v8EmbedderSlot, config->m_pIsolate, |
| platform); |
| |
| if (config->version >= 4) |
| UseRendererType(config->m_RendererType); |
| } |
| g_bLibraryInitialized = true; |
| } |
| |
| FPDF_EXPORT void FPDF_CALLCONV FPDF_DestroyLibrary() { |
| if (!g_bLibraryInitialized) |
| return; |
| |
| #ifdef PDF_ENABLE_XFA |
| CPDFXFA_ModuleDestroy(); |
| #endif // PDF_ENABLE_XFA |
| |
| CPDF_PageModule::Destroy(); |
| CFX_GEModule::Destroy(); |
| IJS_Runtime::Destroy(); |
| |
| g_bLibraryInitialized = false; |
| } |
| |
| FPDF_EXPORT void FPDF_CALLCONV FPDF_SetSandBoxPolicy(FPDF_DWORD policy, |
| FPDF_BOOL enable) { |
| return SetPDFSandboxPolicy(policy, enable); |
| } |
| |
| #if BUILDFLAG(IS_WIN) |
| FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FPDF_SetPrintMode(int mode) { |
| if (mode < FPDF_PRINTMODE_EMF || |
| mode > FPDF_PRINTMODE_POSTSCRIPT3_TYPE42_PASSTHROUGH) { |
| return FALSE; |
| } |
| |
| g_pdfium_print_mode = static_cast<WindowsPrintMode>(mode); |
| return TRUE; |
| } |
| #endif // BUILDFLAG(IS_WIN) |
| |
| 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; |
| |
| RetainPtr<const CPDF_Dictionary> pAcroForm = pRoot->GetDictFor("AcroForm"); |
| if (!pAcroForm) |
| return FORMTYPE_NONE; |
| |
| RetainPtr<const 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; |
| } |
| |
| FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FPDF_LoadXFA(FPDF_DOCUMENT document) { |
| #ifdef PDF_ENABLE_XFA |
| auto* pDoc = CPDFDocumentFromFPDFDocument(document); |
| if (!pDoc) |
| return false; |
| |
| auto* pContext = static_cast<CPDFXFA_Context*>(pDoc->GetExtension()); |
| if (pContext) |
| return pContext->LoadXFADoc(); |
| #endif // PDF_ENABLE_XFA |
| return false; |
| } |
| |
| FPDF_EXPORT FPDF_DOCUMENT FPDF_CALLCONV |
| FPDF_LoadMemDocument(const void* data_buf, int size, FPDF_BYTESTRING password) { |
| return LoadDocumentImpl( |
| pdfium::MakeRetain<CFX_ReadOnlySpanStream>( |
| pdfium::make_span(static_cast<const uint8_t*>(data_buf), size)), |
| password); |
| } |
| |
| FPDF_EXPORT FPDF_DOCUMENT FPDF_CALLCONV |
| FPDF_LoadMemDocument64(const void* data_buf, |
| size_t size, |
| FPDF_BYTESTRING password) { |
| return LoadDocumentImpl( |
| pdfium::MakeRetain<CFX_ReadOnlySpanStream>( |
| pdfium::make_span(static_cast<const uint8_t*>(data_buf), size)), |
| password); |
| } |
| |
| FPDF_EXPORT FPDF_DOCUMENT FPDF_CALLCONV |
| FPDF_LoadCustomDocument(FPDF_FILEACCESS* pFileAccess, |
| FPDF_BYTESTRING password) { |
| if (!pFileAccess) |
| return nullptr; |
| 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; |
| } |
| |
| FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV |
| FPDF_DocumentHasValidCrossReferenceTable(FPDF_DOCUMENT document) { |
| CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document); |
| return pDoc && pDoc->has_valid_cross_reference_table(); |
| } |
| |
| FPDF_EXPORT unsigned long FPDF_CALLCONV |
| FPDF_GetDocPermissions(FPDF_DOCUMENT document) { |
| CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document); |
| return pDoc ? pDoc->GetUserPermissions() : 0; |
| } |
| |
| FPDF_EXPORT int FPDF_CALLCONV |
| FPDF_GetSecurityHandlerRevision(FPDF_DOCUMENT document) { |
| CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document); |
| if (!pDoc || !pDoc->GetParser()) |
| return -1; |
| |
| const CPDF_Dictionary* pDict = pDoc->GetParser()->GetEncryptDict(); |
| return pDict ? pDict->GetIntegerFor("R") : -1; |
| } |
| |
| FPDF_EXPORT int FPDF_CALLCONV FPDF_GetPageCount(FPDF_DOCUMENT document) { |
| auto* pDoc = CPDFDocumentFromFPDFDocument(document); |
| if (!pDoc) |
| return 0; |
| |
| auto* pExtension = pDoc->GetExtension(); |
| return pExtension ? pExtension->GetPageCount() : pDoc->GetPageCount(); |
| } |
| |
| FPDF_EXPORT FPDF_PAGE FPDF_CALLCONV FPDF_LoadPage(FPDF_DOCUMENT document, |
| int page_index) { |
| auto* pDoc = CPDFDocumentFromFPDFDocument(document); |
| if (!pDoc) |
| return nullptr; |
| |
| if (page_index < 0 || page_index >= FPDF_GetPageCount(document)) |
| return nullptr; |
| |
| #ifdef PDF_ENABLE_XFA |
| auto* pContext = static_cast<CPDFXFA_Context*>(pDoc->GetExtension()); |
| if (pContext) { |
| return FPDFPageFromIPDFPage( |
| pContext->GetOrCreateXFAPage(page_index).Leak()); |
| } |
| #endif // PDF_ENABLE_XFA |
| |
| RetainPtr<CPDF_Dictionary> pDict = pDoc->GetMutablePageDictionary(page_index); |
| if (!pDict) |
| return nullptr; |
| |
| auto pPage = pdfium::MakeRetain<CPDF_Page>(pDoc, std::move(pDict)); |
| pPage->SetRenderCache(std::make_unique<CPDF_PageRenderCache>(pPage.Get())); |
| pPage->ParseContent(); |
| return FPDFPageFromIPDFPage(pPage.Leak()); |
| } |
| |
| FPDF_EXPORT float FPDF_CALLCONV FPDF_GetPageWidthF(FPDF_PAGE page) { |
| IPDF_Page* pPage = IPDFPageFromFPDFPage(page); |
| return pPage ? pPage->GetPageWidth() : 0.0f; |
| } |
| |
| FPDF_EXPORT double FPDF_CALLCONV FPDF_GetPageWidth(FPDF_PAGE page) { |
| return FPDF_GetPageWidthF(page); |
| } |
| |
| FPDF_EXPORT float FPDF_CALLCONV FPDF_GetPageHeightF(FPDF_PAGE page) { |
| IPDF_Page* pPage = IPDFPageFromFPDFPage(page); |
| return pPage ? pPage->GetPageHeight() : 0.0f; |
| } |
| |
| FPDF_EXPORT double FPDF_CALLCONV FPDF_GetPageHeight(FPDF_PAGE page) { |
| return FPDF_GetPageHeightF(page); |
| } |
| |
| 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; |
| |
| *rect = FSRectFFromCFXFloatRect(pPage->GetBBox()); |
| return true; |
| } |
| |
| #if BUILDFLAG(IS_WIN) |
| namespace { |
| |
| constexpr float kEpsilonSize = 0.01f; |
| |
| bool IsPageTooSmall(const CPDF_Page* page) { |
| const CFX_SizeF& page_size = page->GetPageSize(); |
| return page_size.width < kEpsilonSize || page_size.height < kEpsilonSize; |
| } |
| |
| bool IsScalingTooSmall(const CFX_Matrix& matrix) { |
| float horizontal; |
| float vertical; |
| if (matrix.a == 0.0f && matrix.d == 0.0f) { |
| horizontal = matrix.b; |
| vertical = matrix.c; |
| } else { |
| horizontal = matrix.a; |
| vertical = matrix.d; |
| } |
| return fabsf(horizontal) < kEpsilonSize || fabsf(vertical) < kEpsilonSize; |
| } |
| |
| // 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) { |
| if (IsPageTooSmall(pPage)) |
| return nullptr; |
| |
| FX_RECT page_rect(start_x, start_y, start_x + size_x, start_y + size_y); |
| CFX_Matrix matrix = pPage->GetDisplayMatrix(page_rect, rotate); |
| if (IsScalingTooSmall(matrix)) |
| return nullptr; |
| |
| *bitmap_area = matrix.TransformRect(mask_box).GetOuterRect(); |
| 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>(); |
| if (!pDst->Create(bitmap_area->Width(), bitmap_area->Height(), |
| FXDIB_Format::kArgb)) { |
| return nullptr; |
| } |
| 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>(); |
| if (!pDst->Create(size_x_bm, size_y_bm, FXDIB_Format::kRgb32)) |
| return; |
| |
| pDst->Clear(0xffffffff); |
| pDst->CompositeBitmap(0, 0, size_x_bm, size_y_bm, pSrc, 0, 0, |
| BlendMode::kNormal, nullptr, false); |
| |
| if (device->GetDeviceType() == DeviceType::kPrinter) { |
| 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; |
| |
| auto pOwnedContext = std::make_unique<CPDF_PageRenderContext>(); |
| CPDF_PageRenderContext* pContext = pOwnedContext.get(); |
| CPDF_Page::RenderContextClearer clearer(pPage); |
| pPage->SetRenderContext(std::move(pOwnedContext)); |
| |
| // 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. |
| const bool bEnableImageMasks = |
| g_pdfium_print_mode == WindowsPrintMode::kEmfImageMasks; |
| const bool bNewBitmap = pPage->BackgroundAlphaNeeded() || |
| (pPage->HasImageMask() && !bEnableImageMasks) || |
| pPage->GetMaskBoundingBoxes().size() > 100; |
| const bool bHasMask = pPage->HasImageMask() && !bNewBitmap; |
| auto* render_data = CPDF_DocRenderData::FromDocument(pPage->GetDocument()); |
| if (!bNewBitmap && !bHasMask) { |
| pContext->m_pDevice = std::make_unique<CPDF_WindowsRenderDevice>( |
| dc, render_data->GetPSFontTracker()); |
| CPDFSDK_RenderPageWithContext(pContext, pPage, start_x, start_y, size_x, |
| size_y, rotate, flags, |
| /*color_scheme=*/nullptr, |
| /*need_to_restore=*/true, /*pause=*/nullptr); |
| return; |
| } |
| |
| RetainPtr<CFX_DIBitmap> pBitmap = pdfium::MakeRetain<CFX_DIBitmap>(); |
| // Create will probably work fine even if it fails here: we will just attach |
| // a zero-sized bitmap to |pDevice|. |
| pBitmap->Create(size_x, size_y, FXDIB_Format::kArgb); |
| pBitmap->Clear(0x00ffffff); |
| CFX_DefaultRenderDevice* pDevice = new CFX_DefaultRenderDevice; |
| pContext->m_pDevice = pdfium::WrapUnique(pDevice); |
| pDevice->Attach(pBitmap); |
| if (bHasMask) { |
| pContext->m_pOptions = std::make_unique<CPDF_RenderOptions>(); |
| pContext->m_pOptions->GetOptions().bBreakForMasks = true; |
| } |
| |
| CPDFSDK_RenderPageWithContext(pContext, pPage, start_x, start_y, size_x, |
| size_y, rotate, flags, /*color_scheme=*/nullptr, |
| /*need_to_restore=*/true, |
| /*pause=*/nullptr); |
| |
| if (!bHasMask) { |
| CPDF_WindowsRenderDevice win_dc(dc, render_data->GetPSFontTracker()); |
| bool bitsStretched = false; |
| if (win_dc.GetDeviceType() == DeviceType::kPrinter) { |
| auto pDst = pdfium::MakeRetain<CFX_DIBitmap>(); |
| if (pDst->Create(size_x, size_y, FXDIB_Format::kRgb32)) { |
| memset(pDst->GetBuffer(), -1, pBitmap->GetPitch() * size_y); |
| pDst->CompositeBitmap(0, 0, size_x, size_y, pBitmap, 0, 0, |
| BlendMode::kNormal, nullptr, false); |
| win_dc.StretchDIBits(pDst, 0, 0, size_x, size_y); |
| bitsStretched = true; |
| } |
| } |
| if (!bitsStretched) |
| win_dc.SetDIBits(pBitmap, 0, 0); |
| return; |
| } |
| |
| // 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); |
| } |
| |
| // Begin rendering to the printer. Add flag to indicate the renderer should |
| // pause after each image mask. |
| pPage->ClearRenderContext(); |
| pOwnedContext = std::make_unique<CPDF_PageRenderContext>(); |
| pContext = pOwnedContext.get(); |
| pPage->SetRenderContext(std::move(pOwnedContext)); |
| pContext->m_pDevice = std::make_unique<CPDF_WindowsRenderDevice>( |
| dc, render_data->GetPSFontTracker()); |
| pContext->m_pOptions = std::make_unique<CPDF_RenderOptions>(); |
| pContext->m_pOptions->GetOptions().bBreakForMasks = true; |
| |
| CPDFSDK_RenderPageWithContext(pContext, pPage, start_x, start_y, size_x, |
| size_y, rotate, flags, /*color_scheme=*/nullptr, |
| /*need_to_restore=*/true, |
| /*pause=*/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); |
| } |
| } |
| #endif // BUILDFLAG(IS_WIN) |
| |
| 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; |
| |
| auto pOwnedContext = std::make_unique<CPDF_PageRenderContext>(); |
| CPDF_PageRenderContext* pContext = pOwnedContext.get(); |
| CPDF_Page::RenderContextClearer clearer(pPage); |
| pPage->SetRenderContext(std::move(pOwnedContext)); |
| |
| auto pOwnedDevice = std::make_unique<CFX_DefaultRenderDevice>(); |
| CFX_DefaultRenderDevice* pDevice = pOwnedDevice.get(); |
| pContext->m_pDevice = std::move(pOwnedDevice); |
| |
| RetainPtr<CFX_DIBitmap> pBitmap(CFXDIBitmapFromFPDFBitmap(bitmap)); |
| pDevice->AttachWithRgbByteOrder(pBitmap, !!(flags & FPDF_REVERSE_BYTE_ORDER)); |
| CPDFSDK_RenderPageWithContext(pContext, pPage, start_x, start_y, size_x, |
| size_y, rotate, flags, /*color_scheme=*/nullptr, |
| /*need_to_restore=*/true, |
| /*pause=*/nullptr); |
| |
| #if defined(_SKIA_SUPPORT_) || defined(_SKIA_SUPPORT_PATHS_) |
| if (CFX_DefaultRenderDevice::SkiaVariantIsDefaultRenderer()) { |
| pDevice->Flush(true); |
| pBitmap->UnPreMultiply(); |
| } |
| #endif |
| } |
| |
| 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; |
| |
| auto pOwnedContext = std::make_unique<CPDF_PageRenderContext>(); |
| CPDF_PageRenderContext* pContext = pOwnedContext.get(); |
| CPDF_Page::RenderContextClearer clearer(pPage); |
| pPage->SetRenderContext(std::move(pOwnedContext)); |
| |
| auto pOwnedDevice = std::make_unique<CFX_DefaultRenderDevice>(); |
| CFX_DefaultRenderDevice* pDevice = pOwnedDevice.get(); |
| pContext->m_pDevice = std::move(pOwnedDevice); |
| |
| RetainPtr<CFX_DIBitmap> pBitmap(CFXDIBitmapFromFPDFBitmap(bitmap)); |
| pDevice->AttachWithRgbByteOrder(std::move(pBitmap), |
| !!(flags & FPDF_REVERSE_BYTE_ORDER)); |
| |
| CFX_FloatRect clipping_rect; |
| if (clipping) |
| clipping_rect = CFXFloatRectFromFSRectF(*clipping); |
| FX_RECT clip_rect = clipping_rect.ToFxRect(); |
| |
| const FX_RECT rect(0, 0, pPage->GetPageWidth(), pPage->GetPageHeight()); |
| CFX_Matrix transform_matrix = pPage->GetDisplayMatrix(rect, 0); |
| if (matrix) |
| transform_matrix *= CFXMatrixFromFSMatrix(*matrix); |
| CPDFSDK_RenderPage(pContext, pPage, transform_matrix, clip_rect, flags, |
| /*color_scheme=*/nullptr); |
| } |
| |
| #if defined(_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; |
| |
| auto pOwnedContext = std::make_unique<CPDF_PageRenderContext>(); |
| CPDF_PageRenderContext* pContext = pOwnedContext.get(); |
| CPDF_Page::RenderContextClearer clearer(pPage); |
| pPage->SetRenderContext(std::move(pOwnedContext)); |
| |
| auto skDevice = std::make_unique<CFX_DefaultRenderDevice>(); |
| FPDF_RECORDER recorder = skDevice->CreateRecorder(size_x, size_y); |
| pContext->m_pDevice = std::move(skDevice); |
| |
| CPDFSDK_RenderPageWithContext(pContext, pPage, 0, 0, size_x, size_y, 0, 0, |
| /*color_scheme=*/nullptr, |
| /*need_to_restore=*/true, /*pause=*/nullptr); |
| |
| return recorder; |
| } |
| #endif // defined(_SKIA_SUPPORT_) |
| |
| FPDF_EXPORT void FPDF_CALLCONV FPDF_ClosePage(FPDF_PAGE page) { |
| if (!page) |
| return; |
| |
| // Take it back across the API and hold for duration of this function. |
| RetainPtr<IPDF_Page> pPage; |
| pPage.Unleak(IPDFPageFromFPDFPage(page)); |
| |
| if (pPage->AsXFAPage()) |
| return; |
| |
| // This will delete the PageView object corresponding to |pPage|. We must |
| // cleanup the PageView before releasing the reference on |pPage| as it will |
| // attempt to reset the PageView during destruction. |
| pPage->AsPDFPage()->ClearView(); |
| } |
| |
| FPDF_EXPORT void FPDF_CALLCONV FPDF_CloseDocument(FPDF_DOCUMENT document) { |
| // Take it back across the API and throw it away, |
| std::unique_ptr<CPDF_Document>(CPDFDocumentFromFPDFDocument(document)); |
| } |
| |
| FPDF_EXPORT unsigned long FPDF_CALLCONV FPDF_GetLastError() { |
| return FXSYS_GetLastError(); |
| } |
| |
| FPDF_EXPORT FPDF_BOOL 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 false; |
| |
| IPDF_Page* pPage = IPDFPageFromFPDFPage(page); |
| const FX_RECT rect(start_x, start_y, start_x + size_x, start_y + size_y); |
| absl::optional<CFX_PointF> pos = |
| pPage->DeviceToPage(rect, rotate, CFX_PointF(device_x, device_y)); |
| if (!pos.has_value()) |
| return false; |
| |
| *page_x = pos->x; |
| *page_y = pos->y; |
| return true; |
| } |
| |
| FPDF_EXPORT FPDF_BOOL 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 (!page || !device_x || !device_y) |
| return false; |
| |
| IPDF_Page* pPage = IPDFPageFromFPDFPage(page); |
| const FX_RECT rect(start_x, start_y, start_x + size_x, start_y + size_y); |
| CFX_PointF page_point(static_cast<float>(page_x), static_cast<float>(page_y)); |
| absl::optional<CFX_PointF> pos = |
| pPage->PageToDevice(rect, rotate, page_point); |
| if (!pos.has_value()) |
| return false; |
| |
| *device_x = FXSYS_roundf(pos->x); |
| *device_y = FXSYS_roundf(pos->y); |
| return true; |
| } |
| |
| 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_Format::kArgb : FXDIB_Format::kRgb32)) { |
| return nullptr; |
| } |
| return FPDFBitmapFromCFXDIBitmap(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_Format::k8bppRgb; |
| break; |
| case FPDFBitmap_BGR: |
| fx_format = FXDIB_Format::kRgb; |
| break; |
| case FPDFBitmap_BGRx: |
| fx_format = FXDIB_Format::kRgb32; |
| break; |
| case FPDFBitmap_BGRA: |
| fx_format = FXDIB_Format::kArgb; |
| break; |
| default: |
| return nullptr; |
| } |
| |
| // Ensure external memory is good at least for the duration of this call. |
| UnownedPtr<uint8_t> pChecker(static_cast<uint8_t*>(first_scan)); |
| auto pBitmap = pdfium::MakeRetain<CFX_DIBitmap>(); |
| if (!pBitmap->Create(width, height, fx_format, pChecker.Get(), stride)) |
| return nullptr; |
| |
| return FPDFBitmapFromCFXDIBitmap(pBitmap.Leak()); |
| } |
| |
| FPDF_EXPORT int FPDF_CALLCONV FPDFBitmap_GetFormat(FPDF_BITMAP bitmap) { |
| if (!bitmap) |
| return FPDFBitmap_Unknown; |
| |
| FXDIB_Format format = CFXDIBitmapFromFPDFBitmap(bitmap)->GetFormat(); |
| switch (format) { |
| case FXDIB_Format::k8bppRgb: |
| case FXDIB_Format::k8bppMask: |
| return FPDFBitmap_Gray; |
| case FXDIB_Format::kRgb: |
| return FPDFBitmap_BGR; |
| case FXDIB_Format::kRgb32: |
| return FPDFBitmap_BGRx; |
| case FXDIB_Format::kArgb: |
| 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(CFXDIBitmapFromFPDFBitmap(bitmap)); |
| device.Attach(pBitmap); |
| if (!pBitmap->IsAlphaFormat()) |
| color |= 0xFF000000; |
| device.FillRect(FX_RECT(left, top, left + width, top + height), |
| static_cast<uint32_t>(color)); |
| } |
| |
| FPDF_EXPORT void* FPDF_CALLCONV FPDFBitmap_GetBuffer(FPDF_BITMAP bitmap) { |
| return bitmap ? CFXDIBitmapFromFPDFBitmap(bitmap)->GetBuffer() : nullptr; |
| } |
| |
| FPDF_EXPORT int FPDF_CALLCONV FPDFBitmap_GetWidth(FPDF_BITMAP bitmap) { |
| return bitmap ? CFXDIBitmapFromFPDFBitmap(bitmap)->GetWidth() : 0; |
| } |
| |
| FPDF_EXPORT int FPDF_CALLCONV FPDFBitmap_GetHeight(FPDF_BITMAP bitmap) { |
| return bitmap ? CFXDIBitmapFromFPDFBitmap(bitmap)->GetHeight() : 0; |
| } |
| |
| FPDF_EXPORT int FPDF_CALLCONV FPDFBitmap_GetStride(FPDF_BITMAP bitmap) { |
| return bitmap ? CFXDIBitmapFromFPDFBitmap(bitmap)->GetPitch() : 0; |
| } |
| |
| FPDF_EXPORT void FPDF_CALLCONV FPDFBitmap_Destroy(FPDF_BITMAP bitmap) { |
| RetainPtr<CFX_DIBitmap> destroyer; |
| destroyer.Unleak(CFXDIBitmapFromFPDFBitmap(bitmap)); |
| } |
| |
| FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV |
| FPDF_GetPageSizeByIndexF(FPDF_DOCUMENT document, |
| int page_index, |
| FS_SIZEF* size) { |
| if (!size) |
| return false; |
| |
| auto* pDoc = CPDFDocumentFromFPDFDocument(document); |
| if (!pDoc) |
| return false; |
| |
| #ifdef PDF_ENABLE_XFA |
| if (page_index < 0 || page_index >= FPDF_GetPageCount(document)) |
| return false; |
| |
| auto* pContext = static_cast<CPDFXFA_Context*>(pDoc->GetExtension()); |
| if (pContext) { |
| RetainPtr<CPDFXFA_Page> pPage = pContext->GetOrCreateXFAPage(page_index); |
| if (!pPage) |
| return false; |
| |
| size->width = pPage->GetPageWidth(); |
| size->height = pPage->GetPageHeight(); |
| return true; |
| } |
| #endif // PDF_ENABLE_XFA |
| |
| RetainPtr<CPDF_Dictionary> pDict = pDoc->GetMutablePageDictionary(page_index); |
| if (!pDict) |
| return false; |
| |
| auto page = pdfium::MakeRetain<CPDF_Page>(pDoc, std::move(pDict)); |
| page->SetRenderCache(std::make_unique<CPDF_PageRenderCache>(page.Get())); |
| size->width = page->GetPageWidth(); |
| size->height = page->GetPageHeight(); |
| return true; |
| } |
| |
| FPDF_EXPORT int FPDF_CALLCONV FPDF_GetPageSizeByIndex(FPDF_DOCUMENT document, |
| int page_index, |
| double* width, |
| double* height) { |
| if (!width || !height) |
| return false; |
| |
| FS_SIZEF size; |
| if (!FPDF_GetPageSizeByIndexF(document, page_index, &size)) |
| return false; |
| |
| *width = size.width; |
| *height = size.height; |
| return true; |
| } |
| |
| FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV |
| FPDF_VIEWERREF_GetPrintScaling(FPDF_DOCUMENT document) { |
| const 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) { |
| const 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) { |
| const CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document); |
| if (!pDoc) |
| return nullptr; |
| CPDF_ViewerPreferences viewRef(pDoc); |
| return FPDFPageRangeFromCPDFArray(viewRef.PrintPageRange()); |
| } |
| |
| FPDF_EXPORT size_t FPDF_CALLCONV |
| FPDF_VIEWERREF_GetPrintPageRangeCount(FPDF_PAGERANGE pagerange) { |
| const CPDF_Array* pArray = CPDFArrayFromFPDFPageRange(pagerange); |
| return pArray ? pArray->size() : 0; |
| } |
| |
| FPDF_EXPORT int FPDF_CALLCONV |
| FPDF_VIEWERREF_GetPrintPageRangeElement(FPDF_PAGERANGE pagerange, |
| size_t index) { |
| const CPDF_Array* pArray = CPDFArrayFromFPDFPageRange(pagerange); |
| if (!pArray || index >= pArray->size()) |
| return -1; |
| return pArray->GetIntegerAt(index); |
| } |
| |
| FPDF_EXPORT FPDF_DUPLEXTYPE FPDF_CALLCONV |
| FPDF_VIEWERREF_GetDuplex(FPDF_DOCUMENT document) { |
| const 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) { |
| const CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document); |
| if (!pDoc) |
| return 0; |
| |
| CPDF_ViewerPreferences viewRef(pDoc); |
| absl::optional<ByteString> bsVal = viewRef.GenericName(key); |
| if (!bsVal.has_value()) |
| return 0; |
| |
| return NulTerminateMaybeCopyAndReturnLength(bsVal.value(), buffer, length); |
| } |
| |
| 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; |
| |
| auto name_tree = CPDF_NameTree::Create(pDoc, "Dests"); |
| FX_SAFE_UINT32 count = name_tree ? name_tree->GetCount() : 0; |
| RetainPtr<const CPDF_Dictionary> pOldStyleDests = pRoot->GetDictFor("Dests"); |
| if (pOldStyleDests) |
| count += pOldStyleDests->size(); |
| return count.ValueOrDefault(0); |
| } |
| |
| 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; |
| |
| ByteString dest_name(name); |
| // TODO(tsepez): murky ownership, should caller get a reference? |
| return FPDFDestFromCPDFArray( |
| CPDF_NameTree::LookupNamedDest(pDoc, dest_name).Get()); |
| } |
| |
| #ifdef PDF_ENABLE_V8 |
| FPDF_EXPORT const char* FPDF_CALLCONV FPDF_GetRecommendedV8Flags() { |
| // Use interpreted JS only to avoid RWX pages in our address space. Also, |
| // --jitless implies --no-expose-wasm, which reduce exposure since no PDF |
| // should contain web assembly. |
| return "--jitless"; |
| } |
| |
| FPDF_EXPORT void* FPDF_CALLCONV FPDF_GetArrayBufferAllocatorSharedInstance() { |
| static pdfium::base::NoDestructor<CFX_V8ArrayBufferAllocator> allocator; |
| return allocator.get(); |
| } |
| #endif // PDF_ENABLE_V8 |
| |
| #ifdef PDF_ENABLE_XFA |
| FPDF_EXPORT FPDF_RESULT FPDF_CALLCONV FPDF_BStr_Init(FPDF_BSTR* bstr) { |
| if (!bstr) |
| return -1; |
| |
| bstr->str = nullptr; |
| bstr->len = 0; |
| return 0; |
| } |
| |
| FPDF_EXPORT FPDF_RESULT FPDF_CALLCONV FPDF_BStr_Set(FPDF_BSTR* bstr, |
| const char* cstr, |
| int length) { |
| if (!bstr || !cstr) |
| return -1; |
| |
| if (length == -1) |
| length = pdfium::base::checked_cast<int>(strlen(cstr)); |
| |
| if (length == 0) { |
| FPDF_BStr_Clear(bstr); |
| return 0; |
| } |
| |
| if (bstr->str && bstr->len < length) |
| bstr->str = FX_Realloc(char, bstr->str, length + 1); |
| else if (!bstr->str) |
| bstr->str = FX_Alloc(char, length + 1); |
| |
| bstr->str[length] = 0; |
| memcpy(bstr->str, cstr, length); |
| bstr->len = length; |
| return 0; |
| } |
| |
| FPDF_EXPORT FPDF_RESULT FPDF_CALLCONV FPDF_BStr_Clear(FPDF_BSTR* bstr) { |
| if (!bstr) |
| return -1; |
| |
| if (bstr->str) { |
| FX_Free(bstr->str); |
| bstr->str = nullptr; |
| } |
| bstr->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; |
| |
| auto name_tree = CPDF_NameTree::Create(pDoc, "Dests"); |
| size_t name_tree_count = name_tree ? name_tree->GetCount() : 0; |
| RetainPtr<const CPDF_Object> pDestObj; |
| WideString wsName; |
| if (static_cast<size_t>(index) >= name_tree_count) { |
| // If |index| is out of bounds, then try to retrieve the Nth old style named |
| // destination. Where N is 0-indexed, with N = index - name_tree_count. |
| RetainPtr<const CPDF_Dictionary> pDest = pRoot->GetDictFor("Dests"); |
| if (!pDest) |
| return nullptr; |
| |
| FX_SAFE_INT32 checked_count = name_tree_count; |
| checked_count += pDest->size(); |
| if (!checked_count.IsValid() || index >= checked_count.ValueOrDie()) |
| return nullptr; |
| |
| index -= name_tree_count; |
| int i = 0; |
| ByteStringView bsName; |
| CPDF_DictionaryLocker locker(pDest); |
| for (const auto& it : locker) { |
| bsName = it.first.AsStringView(); |
| pDestObj = it.second; |
| if (i == index) |
| break; |
| i++; |
| } |
| wsName = PDF_DecodeText(bsName.raw_span()); |
| } else { |
| pDestObj.Reset(name_tree->LookupValueAndName(index, &wsName)); |
| } |
| if (!pDestObj) |
| return nullptr; |
| if (const CPDF_Dictionary* pDict = pDestObj->AsDictionary()) { |
| pDestObj = pDict->GetArrayFor("D"); |
| if (!pDestObj) |
| return nullptr; |
| } |
| if (!pDestObj->IsArray()) |
| return nullptr; |
| |
| ByteString utf16Name = wsName.ToUTF16LE(); |
| int len = pdfium::base::checked_cast<int>(utf16Name.GetLength()); |
| if (!buffer) { |
| *buflen = len; |
| } else if (len <= *buflen) { |
| memcpy(buffer, utf16Name.c_str(), len); |
| *buflen = len; |
| } else { |
| *buflen = -1; |
| } |
| return FPDFDestFromCPDFArray(pDestObj->AsArray()); |
| } |
| |
| FPDF_EXPORT int FPDF_CALLCONV FPDF_GetXFAPacketCount(FPDF_DOCUMENT document) { |
| CPDF_Document* doc = CPDFDocumentFromFPDFDocument(document); |
| if (!doc) |
| return -1; |
| |
| return fxcrt::CollectionSize<int>( |
| GetXFAPackets(GetXFAEntryFromDocument(doc))); |
| } |
| |
| FPDF_EXPORT unsigned long FPDF_CALLCONV |
| FPDF_GetXFAPacketName(FPDF_DOCUMENT document, |
| int index, |
| void* buffer, |
| unsigned long buflen) { |
| CPDF_Document* doc = CPDFDocumentFromFPDFDocument(document); |
| if (!doc || index < 0) |
| return 0; |
| |
| std::vector<XFAPacket> xfa_packets = |
| GetXFAPackets(GetXFAEntryFromDocument(doc)); |
| if (static_cast<size_t>(index) >= xfa_packets.size()) |
| return 0; |
| |
| return NulTerminateMaybeCopyAndReturnLength(xfa_packets[index].name, buffer, |
| buflen); |
| } |
| |
| FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV |
| FPDF_GetXFAPacketContent(FPDF_DOCUMENT document, |
| int index, |
| void* buffer, |
| unsigned long buflen, |
| unsigned long* out_buflen) { |
| CPDF_Document* doc = CPDFDocumentFromFPDFDocument(document); |
| if (!doc || index < 0 || !out_buflen) |
| return false; |
| |
| std::vector<XFAPacket> xfa_packets = |
| GetXFAPackets(GetXFAEntryFromDocument(doc)); |
| if (static_cast<size_t>(index) >= xfa_packets.size()) |
| return false; |
| |
| *out_buflen = DecodeStreamMaybeCopyAndReturnLength(xfa_packets[index].data, |
| buffer, buflen); |
| return true; |
| } |
| |
| FPDF_EXPORT unsigned long FPDF_CALLCONV |
| FPDF_GetTrailerEnds(FPDF_DOCUMENT document, |
| unsigned int* buffer, |
| unsigned long length) { |
| auto* doc = CPDFDocumentFromFPDFDocument(document); |
| if (!doc) |
| return 0; |
| |
| // Start recording trailer ends. |
| auto* parser = doc->GetParser(); |
| CPDF_SyntaxParser* syntax = parser->GetSyntax(); |
| std::vector<unsigned int> trailer_ends; |
| syntax->SetTrailerEnds(&trailer_ends); |
| |
| // Traverse the document. |
| syntax->SetPos(0); |
| while (true) { |
| CPDF_SyntaxParser::WordResult word_result = syntax->GetNextWord(); |
| if (word_result.is_number) { |
| // The object number was read. Read the generation number. |
| word_result = syntax->GetNextWord(); |
| if (!word_result.is_number) |
| break; |
| |
| word_result = syntax->GetNextWord(); |
| if (word_result.word != "obj") |
| break; |
| |
| syntax->GetObjectBody(nullptr); |
| |
| word_result = syntax->GetNextWord(); |
| if (word_result.word != "endobj") |
| break; |
| } else if (word_result.word == "trailer") { |
| syntax->GetObjectBody(nullptr); |
| } else if (word_result.word == "startxref") { |
| syntax->GetNextWord(); |
| } else if (word_result.word == "xref") { |
| while (true) { |
| word_result = syntax->GetNextWord(); |
| if (word_result.word.IsEmpty() || word_result.word == "startxref") |
| break; |
| } |
| syntax->GetNextWord(); |
| } else { |
| break; |
| } |
| } |
| |
| // Stop recording trailer ends. |
| syntax->SetTrailerEnds(nullptr); |
| |
| const unsigned long trailer_ends_len = |
| fxcrt::CollectionSize<unsigned long>(trailer_ends); |
| if (buffer && length >= trailer_ends_len) { |
| for (size_t i = 0; i < trailer_ends_len; ++i) |
| buffer[i] = trailer_ends[i]; |
| } |
| |
| return trailer_ends_len; |
| } |
