blob: ff4d46e357705e22dbd522d04cd918bb078b36a3 [file] [log] [blame]
// 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 "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_document.h"
#include "core/fpdfapi/parser/fpdf_parser_decode.h"
#include "core/fpdfapi/render/cpdf_progressiverenderer.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/fxcodec/fx_codec.h"
#include "core/fxcrt/fx_memory.h"
#include "core/fxcrt/fx_safe_types.h"
#include "core/fxge/cfx_fxgedevice.h"
#include "core/fxge/cfx_gemodule.h"
#include "fpdfsdk/cpdfsdk_formfillenvironment.h"
#include "fpdfsdk/cpdfsdk_pageview.h"
#include "fpdfsdk/fsdk_define.h"
#include "fpdfsdk/fsdk_pauseadapter.h"
#include "fpdfsdk/javascript/ijs_runtime.h"
#include "public/fpdf_ext.h"
#include "public/fpdf_progressive.h"
#include "third_party/base/numerics/safe_conversions_impl.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 "fpdfsdk/fpdfxfa/cxfa_fwladaptertimermgr.h"
#include "public/fpdf_formfill.h"
#include "xfa/fxbarcode/BC_Library.h"
#endif // PDF_ENABLE_XFA
#if _FXM_PLATFORM_ == _FXM_PLATFORM_WINDOWS_
#include "core/fxge/cfx_windowsdevice.h"
#endif
namespace {
// Also indicates whether library is currently initialized.
CCodec_ModuleMgr* g_pCodecModule = nullptr;
void RenderPageImpl(CPDF_PageRenderContext* pContext,
CPDF_Page* pPage,
const CFX_Matrix& matrix,
const FX_RECT& clipping_rect,
int flags,
bool bNeedToRestore,
IFSDK_PAUSE_Adapter* pause) {
if (!pContext->m_pOptions)
pContext->m_pOptions = pdfium::MakeUnique<CPDF_RenderOptions>();
if (flags & FPDF_LCD_TEXT)
pContext->m_pOptions->m_Flags |= RENDER_CLEARTYPE;
else
pContext->m_pOptions->m_Flags &= ~RENDER_CLEARTYPE;
if (flags & FPDF_NO_NATIVETEXT)
pContext->m_pOptions->m_Flags |= RENDER_NO_NATIVETEXT;
if (flags & FPDF_RENDER_LIMITEDIMAGECACHE)
pContext->m_pOptions->m_Flags |= RENDER_LIMITEDIMAGECACHE;
if (flags & FPDF_RENDER_FORCEHALFTONE)
pContext->m_pOptions->m_Flags |= RENDER_FORCE_HALFTONE;
#ifndef PDF_ENABLE_XFA
if (flags & FPDF_RENDER_NO_SMOOTHTEXT)
pContext->m_pOptions->m_Flags |= RENDER_NOTEXTSMOOTH;
if (flags & FPDF_RENDER_NO_SMOOTHIMAGE)
pContext->m_pOptions->m_Flags |= RENDER_NOIMAGESMOOTH;
if (flags & FPDF_RENDER_NO_SMOOTHPATH)
pContext->m_pOptions->m_Flags |= RENDER_NOPATHSMOOTH;
#endif // PDF_ENABLE_XFA
// Grayscale output
if (flags & FPDF_GRAYSCALE) {
pContext->m_pOptions->m_ColorMode = RENDER_COLOR_GRAY;
pContext->m_pOptions->m_ForeColor = 0;
pContext->m_pOptions->m_BackColor = 0xffffff;
}
const CPDF_OCContext::UsageType usage =
(flags & FPDF_PRINTING) ? CPDF_OCContext::Print : CPDF_OCContext::View;
pContext->m_pOptions->m_AddFlags = flags >> 8;
pContext->m_pOptions->m_pOCContext =
new CPDF_OCContext(pPage->m_pDocument, 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);
}
class CPDF_CustomAccess final : public IFX_SeekableReadStream {
public:
static CFX_RetainPtr<CPDF_CustomAccess> Create(FPDF_FILEACCESS* pFileAccess) {
return CFX_RetainPtr<CPDF_CustomAccess>(new CPDF_CustomAccess(pFileAccess));
}
// IFX_SeekableReadStream
FX_FILESIZE GetSize() override;
bool ReadBlock(void* buffer, FX_FILESIZE offset, size_t size) override;
private:
explicit CPDF_CustomAccess(FPDF_FILEACCESS* pFileAccess);
FPDF_FILEACCESS m_FileAccess;
};
CPDF_CustomAccess::CPDF_CustomAccess(FPDF_FILEACCESS* pFileAccess)
: m_FileAccess(*pFileAccess) {}
FX_FILESIZE CPDF_CustomAccess::GetSize() {
return m_FileAccess.m_FileLen;
}
bool CPDF_CustomAccess::ReadBlock(void* buffer,
FX_FILESIZE offset,
size_t size) {
if (offset < 0)
return false;
FX_SAFE_FILESIZE newPos = pdfium::base::checked_cast<FX_FILESIZE>(size);
newPos += offset;
if (!newPos.IsValid() ||
newPos.ValueOrDie() > static_cast<FX_FILESIZE>(m_FileAccess.m_FileLen)) {
return false;
}
return !!m_FileAccess.m_GetBlock(m_FileAccess.m_Param, offset,
reinterpret_cast<uint8_t*>(buffer), size);
}
#ifdef PDF_ENABLE_XFA
class CFPDF_FileStream : public IFX_SeekableStream {
public:
static CFX_RetainPtr<CFPDF_FileStream> Create(FPDF_FILEHANDLER* pFS) {
return CFX_RetainPtr<CFPDF_FileStream>(new CFPDF_FileStream(pFS));
}
~CFPDF_FileStream() override;
// IFX_SeekableStream:
FX_FILESIZE GetSize() override;
bool IsEOF() override;
FX_FILESIZE GetPosition() override;
bool ReadBlock(void* buffer, FX_FILESIZE offset, size_t size) override;
size_t ReadBlock(void* buffer, size_t size) override;
bool WriteBlock(const void* buffer, FX_FILESIZE offset, size_t size) override;
bool Flush() override;
void SetPosition(FX_FILESIZE pos) { m_nCurPos = pos; }
protected:
explicit CFPDF_FileStream(FPDF_FILEHANDLER* pFS);
FPDF_FILEHANDLER* m_pFS;
FX_FILESIZE m_nCurPos;
};
CFPDF_FileStream::CFPDF_FileStream(FPDF_FILEHANDLER* pFS) {
m_pFS = pFS;
m_nCurPos = 0;
}
CFPDF_FileStream::~CFPDF_FileStream() {
if (m_pFS && m_pFS->Release)
m_pFS->Release(m_pFS->clientData);
}
FX_FILESIZE CFPDF_FileStream::GetSize() {
if (m_pFS && m_pFS->GetSize)
return (FX_FILESIZE)m_pFS->GetSize(m_pFS->clientData);
return 0;
}
bool CFPDF_FileStream::IsEOF() {
return m_nCurPos >= GetSize();
}
FX_FILESIZE CFPDF_FileStream::GetPosition() {
return m_nCurPos;
}
bool CFPDF_FileStream::ReadBlock(void* buffer,
FX_FILESIZE offset,
size_t size) {
if (!buffer || !size || !m_pFS->ReadBlock)
return false;
if (m_pFS->ReadBlock(m_pFS->clientData, (FPDF_DWORD)offset, buffer,
(FPDF_DWORD)size) == 0) {
m_nCurPos = offset + size;
return true;
}
return false;
}
size_t CFPDF_FileStream::ReadBlock(void* buffer, size_t size) {
if (!buffer || !size || !m_pFS->ReadBlock)
return 0;
FX_FILESIZE nSize = GetSize();
if (m_nCurPos >= nSize)
return 0;
FX_FILESIZE dwAvail = nSize - m_nCurPos;
if (dwAvail < (FX_FILESIZE)size)
size = (size_t)dwAvail;
if (m_pFS->ReadBlock(m_pFS->clientData, (FPDF_DWORD)m_nCurPos, buffer,
(FPDF_DWORD)size) == 0) {
m_nCurPos += size;
return size;
}
return 0;
}
bool CFPDF_FileStream::WriteBlock(const void* buffer,
FX_FILESIZE offset,
size_t size) {
if (!m_pFS || !m_pFS->WriteBlock)
return false;
if (m_pFS->WriteBlock(m_pFS->clientData, (FPDF_DWORD)offset, buffer,
(FPDF_DWORD)size) == 0) {
m_nCurPos = offset + size;
return true;
}
return false;
}
bool CFPDF_FileStream::Flush() {
if (!m_pFS || !m_pFS->Flush)
return true;
return m_pFS->Flush(m_pFS->clientData) == 0;
}
#endif // PDF_ENABLE_XFA
} // namespace
UnderlyingDocumentType* UnderlyingFromFPDFDocument(FPDF_DOCUMENT doc) {
return static_cast<UnderlyingDocumentType*>(doc);
}
FPDF_DOCUMENT FPDFDocumentFromUnderlying(UnderlyingDocumentType* doc) {
return static_cast<FPDF_DOCUMENT>(doc);
}
UnderlyingPageType* UnderlyingFromFPDFPage(FPDF_PAGE page) {
return static_cast<UnderlyingPageType*>(page);
}
CPDF_Document* CPDFDocumentFromFPDFDocument(FPDF_DOCUMENT doc) {
#ifdef PDF_ENABLE_XFA
return doc ? UnderlyingFromFPDFDocument(doc)->GetPDFDoc() : nullptr;
#else // PDF_ENABLE_XFA
return UnderlyingFromFPDFDocument(doc);
#endif // PDF_ENABLE_XFA
}
FPDF_DOCUMENT FPDFDocumentFromCPDFDocument(CPDF_Document* doc) {
#ifdef PDF_ENABLE_XFA
return doc ? FPDFDocumentFromUnderlying(
new CPDFXFA_Context(pdfium::WrapUnique(doc)))
: nullptr;
#else // PDF_ENABLE_XFA
return FPDFDocumentFromUnderlying(doc);
#endif // PDF_ENABLE_XFA
}
CPDF_Page* CPDFPageFromFPDFPage(FPDF_PAGE page) {
#ifdef PDF_ENABLE_XFA
return page ? UnderlyingFromFPDFPage(page)->GetPDFPage() : nullptr;
#else // PDF_ENABLE_XFA
return UnderlyingFromFPDFPage(page);
#endif // PDF_ENABLE_XFA
}
CFX_DIBitmap* CFXBitmapFromFPDFBitmap(FPDF_BITMAP bitmap) {
return static_cast<CFX_DIBitmap*>(bitmap);
}
CFX_RetainPtr<IFX_SeekableReadStream> MakeSeekableReadStream(
FPDF_FILEACCESS* pFileAccess) {
return CPDF_CustomAccess::Create(pFileAccess);
}
#ifdef PDF_ENABLE_XFA
CFX_RetainPtr<IFX_SeekableStream> MakeSeekableStream(
FPDF_FILEHANDLER* pFilehandler) {
return CFPDF_FileStream::Create(pFilehandler);
}
#endif // PDF_ENABLE_XFA
// 0 bit: FPDF_POLICY_MACHINETIME_ACCESS
static uint32_t foxit_sandbox_policy = 0xFFFFFFFF;
void FSDK_SetSandBoxPolicy(FPDF_DWORD policy, FPDF_BOOL enable) {
switch (policy) {
case FPDF_POLICY_MACHINETIME_ACCESS: {
if (enable)
foxit_sandbox_policy |= 0x01;
else
foxit_sandbox_policy &= 0xFFFFFFFE;
} break;
default:
break;
}
}
FPDF_BOOL FSDK_IsSandBoxPolicyEnabled(FPDF_DWORD policy) {
switch (policy) {
case FPDF_POLICY_MACHINETIME_ACCESS:
return !!(foxit_sandbox_policy & 0x01);
default:
return false;
}
}
DLLEXPORT void STDCALL FPDF_InitLibrary() {
FPDF_InitLibraryWithConfig(nullptr);
}
DLLEXPORT void STDCALL
FPDF_InitLibraryWithConfig(const FPDF_LIBRARY_CONFIG* cfg) {
if (g_pCodecModule)
return;
g_pCodecModule = new CCodec_ModuleMgr();
CFX_GEModule* pModule = CFX_GEModule::Get();
pModule->Init(cfg ? cfg->m_pUserFontPaths : nullptr, g_pCodecModule);
CPDF_ModuleMgr* pModuleMgr = CPDF_ModuleMgr::Get();
pModuleMgr->SetCodecModule(g_pCodecModule);
pModuleMgr->InitPageModule();
pModuleMgr->LoadEmbeddedGB1CMaps();
pModuleMgr->LoadEmbeddedJapan1CMaps();
pModuleMgr->LoadEmbeddedCNS1CMaps();
pModuleMgr->LoadEmbeddedKorea1CMaps();
#ifdef PDF_ENABLE_XFA
FXJSE_Initialize();
BC_Library_Init();
#endif // PDF_ENABLE_XFA
if (cfg && cfg->version >= 2)
IJS_Runtime::Initialize(cfg->m_v8EmbedderSlot, cfg->m_pIsolate);
}
DLLEXPORT void STDCALL FPDF_DestroyLibrary() {
if (!g_pCodecModule)
return;
#ifdef PDF_ENABLE_XFA
BC_Library_Destory();
FXJSE_Finalize();
#endif // PDF_ENABLE_XFA
CPDF_ModuleMgr::Destroy();
CFX_GEModule::Destroy();
delete g_pCodecModule;
g_pCodecModule = nullptr;
IJS_Runtime::Destroy();
}
#ifndef _WIN32
int g_LastError;
void SetLastError(int err) {
g_LastError = err;
}
int GetLastError() {
return g_LastError;
}
#endif // _WIN32
void ProcessParseError(CPDF_Parser::Error err) {
uint32_t err_code = FPDF_ERR_SUCCESS;
// Translate FPDFAPI error code to FPDFVIEW error code
switch (err) {
case CPDF_Parser::SUCCESS:
err_code = FPDF_ERR_SUCCESS;
break;
case CPDF_Parser::FILE_ERROR:
err_code = FPDF_ERR_FILE;
break;
case CPDF_Parser::FORMAT_ERROR:
err_code = FPDF_ERR_FORMAT;
break;
case CPDF_Parser::PASSWORD_ERROR:
err_code = FPDF_ERR_PASSWORD;
break;
case CPDF_Parser::HANDLER_ERROR:
err_code = FPDF_ERR_SECURITY;
break;
}
SetLastError(err_code);
}
DLLEXPORT void STDCALL FPDF_SetSandBoxPolicy(FPDF_DWORD policy,
FPDF_BOOL enable) {
return FSDK_SetSandBoxPolicy(policy, enable);
}
#if defined(_WIN32)
#if defined(PDFIUM_PRINT_TEXT_WITH_GDI)
DLLEXPORT void STDCALL
FPDF_SetTypefaceAccessibleFunc(PDFiumEnsureTypefaceCharactersAccessible func) {
g_pdfium_typeface_accessible_func = func;
}
DLLEXPORT void STDCALL FPDF_SetPrintTextWithGDI(FPDF_BOOL use_gdi) {
g_pdfium_print_text_with_gdi = !!use_gdi;
}
#endif // PDFIUM_PRINT_TEXT_WITH_GDI
DLLEXPORT FPDF_BOOL STDCALL FPDF_SetPrintPostscriptLevel(int postscript_level) {
if (postscript_level != 0 && postscript_level != 2 && postscript_level != 3)
return FALSE;
g_pdfium_print_postscript_level = postscript_level;
return TRUE;
}
#endif // defined(_WIN32)
DLLEXPORT FPDF_DOCUMENT STDCALL 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.
CFX_RetainPtr<IFX_SeekableReadStream> pFileAccess =
IFX_SeekableReadStream::CreateFromFilename((const FX_CHAR*)file_path);
if (!pFileAccess)
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;
}
return FPDFDocumentFromCPDFDocument(pDocument.release());
}
#ifdef PDF_ENABLE_XFA
DLLEXPORT FPDF_BOOL STDCALL FPDF_HasXFAField(FPDF_DOCUMENT document,
int* docType) {
if (!document)
return false;
CPDF_Document* pdfDoc =
(static_cast<CPDFXFA_Context*>(document))->GetPDFDoc();
if (!pdfDoc)
return false;
CPDF_Dictionary* pRoot = pdfDoc->GetRoot();
if (!pRoot)
return false;
CPDF_Dictionary* pAcroForm = pRoot->GetDictFor("AcroForm");
if (!pAcroForm)
return false;
CPDF_Object* pXFA = pAcroForm->GetObjectFor("XFA");
if (!pXFA)
return false;
bool bDynamicXFA = pRoot->GetBooleanFor("NeedsRendering", false);
*docType = bDynamicXFA ? DOCTYPE_DYNAMIC_XFA : DOCTYPE_STATIC_XFA;
return true;
}
DLLEXPORT FPDF_BOOL STDCALL FPDF_LoadXFA(FPDF_DOCUMENT document) {
return document && (static_cast<CPDFXFA_Context*>(document))->LoadXFADoc();
}
#endif // PDF_ENABLE_XFA
class CMemFile final : public IFX_SeekableReadStream {
public:
static CFX_RetainPtr<CMemFile> Create(uint8_t* pBuf, FX_FILESIZE size) {
return CFX_RetainPtr<CMemFile>(new CMemFile(pBuf, size));
}
FX_FILESIZE GetSize() override { return m_size; }
bool ReadBlock(void* buffer, FX_FILESIZE offset, size_t size) override {
if (offset < 0)
return false;
FX_SAFE_FILESIZE newPos = pdfium::base::checked_cast<FX_FILESIZE>(size);
newPos += offset;
if (!newPos.IsValid() || newPos.ValueOrDie() > m_size)
return false;
FXSYS_memcpy(buffer, m_pBuf + offset, size);
return true;
}
private:
CMemFile(uint8_t* pBuf, FX_FILESIZE size) : m_pBuf(pBuf), m_size(size) {}
uint8_t* const m_pBuf;
const FX_FILESIZE m_size;
};
DLLEXPORT FPDF_DOCUMENT STDCALL FPDF_LoadMemDocument(const void* data_buf,
int size,
FPDF_BYTESTRING password) {
CFX_RetainPtr<CMemFile> pMemFile = CMemFile::Create((uint8_t*)data_buf, size);
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(pMemFile, pDocument.get());
if (error != CPDF_Parser::SUCCESS) {
ProcessParseError(error);
return nullptr;
}
CheckUnSupportError(pDocument.get(), error);
return FPDFDocumentFromCPDFDocument(pDocument.release());
}
DLLEXPORT FPDF_DOCUMENT STDCALL
FPDF_LoadCustomDocument(FPDF_FILEACCESS* pFileAccess,
FPDF_BYTESTRING password) {
CFX_RetainPtr<CPDF_CustomAccess> pFile =
CPDF_CustomAccess::Create(pFileAccess);
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(pFile, pDocument.get());
if (error != CPDF_Parser::SUCCESS) {
ProcessParseError(error);
return nullptr;
}
CheckUnSupportError(pDocument.get(), error);
return FPDFDocumentFromCPDFDocument(pDocument.release());
}
DLLEXPORT FPDF_BOOL STDCALL FPDF_GetFileVersion(FPDF_DOCUMENT doc,
int* fileVersion) {
if (!fileVersion)
return false;
*fileVersion = 0;
CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(doc);
if (!pDoc)
return false;
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).
DLLEXPORT unsigned long STDCALL 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();
}
DLLEXPORT int STDCALL 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;
}
DLLEXPORT int STDCALL FPDF_GetPageCount(FPDF_DOCUMENT document) {
UnderlyingDocumentType* pDoc = UnderlyingFromFPDFDocument(document);
return pDoc ? pDoc->GetPageCount() : 0;
}
DLLEXPORT FPDF_PAGE STDCALL 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);
#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
}
DLLEXPORT double STDCALL FPDF_GetPageWidth(FPDF_PAGE page) {
UnderlyingPageType* pPage = UnderlyingFromFPDFPage(page);
return pPage ? pPage->GetPageWidth() : 0.0;
}
DLLEXPORT double STDCALL FPDF_GetPageHeight(FPDF_PAGE page) {
UnderlyingPageType* pPage = UnderlyingFromFPDFPage(page);
return pPage ? pPage->GetPageHeight() : 0.0;
}
#if defined(_WIN32)
DLLEXPORT void STDCALL 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;
CPDF_PageRenderContext* pContext = new CPDF_PageRenderContext;
pPage->SetRenderContext(pdfium::WrapUnique(pContext));
std::unique_ptr<CFX_DIBitmap> pBitmap;
// TODO: This results in unnecessary rasterization of some PDFs due to
// HasImageMask() returning true. If any image on the page is a mask, the
// entire page gets rasterized and the spool size gets huge.
const bool bNewBitmap =
pPage->BackgroundAlphaNeeded() || pPage->HasImageMask();
if (bNewBitmap) {
pBitmap = pdfium::MakeUnique<CFX_DIBitmap>();
pBitmap->Create(size_x, size_y, FXDIB_Argb);
pBitmap->Clear(0x00ffffff);
CFX_FxgeDevice* pDevice = new CFX_FxgeDevice;
pContext->m_pDevice = pdfium::WrapUnique(pDevice);
pDevice->Attach(pBitmap.get(), false, nullptr, false);
} else {
pContext->m_pDevice = pdfium::MakeUnique<CFX_WindowsDevice>(dc);
}
FPDF_RenderPage_Retail(pContext, page, start_x, start_y, size_x, size_y,
rotate, flags, true, nullptr);
if (bNewBitmap) {
CFX_WindowsDevice WinDC(dc);
if (WinDC.GetDeviceCaps(FXDC_DEVICE_CLASS) == FXDC_PRINTER) {
std::unique_ptr<CFX_DIBitmap> pDst = pdfium::MakeUnique<CFX_DIBitmap>();
int pitch = pBitmap->GetPitch();
pDst->Create(size_x, size_y, FXDIB_Rgb32);
FXSYS_memset(pDst->GetBuffer(), -1, pitch * size_y);
pDst->CompositeBitmap(0, 0, size_x, size_y, pBitmap.get(), 0, 0,
FXDIB_BLEND_NORMAL, nullptr, false, nullptr);
WinDC.StretchDIBits(pDst.get(), 0, 0, size_x, size_y);
} else {
WinDC.SetDIBits(pBitmap.get(), 0, 0);
}
}
pPage->SetRenderContext(nullptr);
}
#endif // defined(_WIN32)
DLLEXPORT void STDCALL 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_FxgeDevice* pDevice = new CFX_FxgeDevice;
pContext->m_pDevice.reset(pDevice);
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();
pBitmap->UnPreMultiply();
#endif
pPage->SetRenderContext(nullptr);
}
DLLEXPORT void STDCALL 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_FxgeDevice* pDevice = new CFX_FxgeDevice;
pContext->m_pDevice.reset(pDevice);
CFX_DIBitmap* pBitmap = CFXBitmapFromFPDFBitmap(bitmap);
pDevice->Attach(pBitmap, !!(flags & FPDF_REVERSE_BYTE_ORDER), nullptr, false);
CFX_Matrix transform_matrix = pPage->GetPageMatrix();
if (matrix) {
CFX_Matrix cmatrix;
cmatrix.a = matrix->a;
cmatrix.b = matrix->b;
cmatrix.c = matrix->c;
cmatrix.d = matrix->d;
cmatrix.e = matrix->e;
cmatrix.f = matrix->f;
transform_matrix.Concat(cmatrix);
}
CFX_FloatRect clipping_rect;
if (clipping) {
clipping_rect.left = clipping->left;
clipping_rect.bottom = clipping->bottom;
clipping_rect.right = clipping->right;
clipping_rect.top = clipping->top;
}
RenderPageImpl(pContext, pPage, transform_matrix, clipping_rect.ToFxRect(),
flags, true, nullptr);
pPage->SetRenderContext(nullptr);
}
#ifdef _SKIA_SUPPORT_
DLLEXPORT FPDF_RECORDER STDCALL 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_FxgeDevice* skDevice = new CFX_FxgeDevice;
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
DLLEXPORT void STDCALL FPDF_ClosePage(FPDF_PAGE page) {
UnderlyingPageType* pPage = UnderlyingFromFPDFPage(page);
if (!page)
return;
#ifdef PDF_ENABLE_XFA
pPage->Release();
#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
}
DLLEXPORT void STDCALL FPDF_CloseDocument(FPDF_DOCUMENT document) {
delete UnderlyingFromFPDFDocument(document);
}
DLLEXPORT unsigned long STDCALL FPDF_GetLastError() {
return GetLastError();
}
DLLEXPORT void STDCALL 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(page2device, start_x, start_y, size_x, size_y,
rotate);
CFX_Matrix device2page;
device2page.SetReverse(page2device);
FX_FLOAT page_x_f, page_y_f;
device2page.Transform((FX_FLOAT)(device_x), (FX_FLOAT)(device_y), page_x_f,
page_y_f);
*page_x = (page_x_f);
*page_y = (page_y_f);
#endif // PDF_ENABLE_XFA
}
DLLEXPORT void STDCALL 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(page2device, start_x, start_y, size_x, size_y,
rotate);
FX_FLOAT device_x_f, device_y_f;
page2device.Transform(((FX_FLOAT)page_x), ((FX_FLOAT)page_y), device_x_f,
device_y_f);
*device_x = FXSYS_round(device_x_f);
*device_y = FXSYS_round(device_y_f);
#endif // PDF_ENABLE_XFA
}
DLLEXPORT FPDF_BITMAP STDCALL FPDFBitmap_Create(int width,
int height,
int alpha) {
auto pBitmap = pdfium::MakeUnique<CFX_DIBitmap>();
if (!pBitmap->Create(width, height, alpha ? FXDIB_Argb : FXDIB_Rgb32))
return nullptr;
return pBitmap.release();
}
DLLEXPORT FPDF_BITMAP STDCALL 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;
}
CFX_DIBitmap* pBitmap = new CFX_DIBitmap;
pBitmap->Create(width, height, fx_format, (uint8_t*)first_scan, stride);
return pBitmap;
}
DLLEXPORT void STDCALL FPDFBitmap_FillRect(FPDF_BITMAP bitmap,
int left,
int top,
int width,
int height,
FPDF_DWORD color) {
if (!bitmap)
return;
CFX_FxgeDevice device;
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);
}
DLLEXPORT void* STDCALL FPDFBitmap_GetBuffer(FPDF_BITMAP bitmap) {
return bitmap ? CFXBitmapFromFPDFBitmap(bitmap)->GetBuffer() : nullptr;
}
DLLEXPORT int STDCALL FPDFBitmap_GetWidth(FPDF_BITMAP bitmap) {
return bitmap ? CFXBitmapFromFPDFBitmap(bitmap)->GetWidth() : 0;
}
DLLEXPORT int STDCALL FPDFBitmap_GetHeight(FPDF_BITMAP bitmap) {
return bitmap ? CFXBitmapFromFPDFBitmap(bitmap)->GetHeight() : 0;
}
DLLEXPORT int STDCALL FPDFBitmap_GetStride(FPDF_BITMAP bitmap) {
return bitmap ? CFXBitmapFromFPDFBitmap(bitmap)->GetPitch() : 0;
}
DLLEXPORT void STDCALL FPDFBitmap_Destroy(FPDF_BITMAP bitmap) {
delete 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,
IFSDK_PAUSE_Adapter* pause) {
CPDF_Page* pPage = CPDFPageFromFPDFPage(page);
if (!pPage)
return;
CFX_Matrix matrix;
pPage->GetDisplayMatrix(matrix, start_x, start_y, size_x, size_y, rotate);
FX_RECT rect(start_x, start_y, start_x + size_x, start_y + size_y);
RenderPageImpl(pContext, pPage, matrix, rect, flags, bNeedToRestore, pause);
}
DLLEXPORT int STDCALL 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;
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;
}
DLLEXPORT FPDF_BOOL STDCALL
FPDF_VIEWERREF_GetPrintScaling(FPDF_DOCUMENT document) {
CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document);
if (!pDoc)
return true;
CPDF_ViewerPreferences viewRef(pDoc);
return viewRef.PrintScaling();
}
DLLEXPORT int STDCALL FPDF_VIEWERREF_GetNumCopies(FPDF_DOCUMENT document) {
CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document);
if (!pDoc)
return 1;
CPDF_ViewerPreferences viewRef(pDoc);
return viewRef.NumCopies();
}
DLLEXPORT FPDF_PAGERANGE STDCALL
FPDF_VIEWERREF_GetPrintPageRange(FPDF_DOCUMENT document) {
CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document);
if (!pDoc)
return nullptr;
CPDF_ViewerPreferences viewRef(pDoc);
return viewRef.PrintPageRange();
}
DLLEXPORT FPDF_DUPLEXTYPE STDCALL
FPDF_VIEWERREF_GetDuplex(FPDF_DOCUMENT document) {
CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document);
if (!pDoc)
return DuplexUndefined;
CPDF_ViewerPreferences viewRef(pDoc);
CFX_ByteString duplex = viewRef.Duplex();
if ("Simplex" == duplex)
return Simplex;
if ("DuplexFlipShortEdge" == duplex)
return DuplexFlipShortEdge;
if ("DuplexFlipLongEdge" == duplex)
return DuplexFlipLongEdge;
return DuplexUndefined;
}
DLLEXPORT unsigned long STDCALL 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);
CFX_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;
}
DLLEXPORT FPDF_DWORD STDCALL FPDF_CountNamedDests(FPDF_DOCUMENT document) {
CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document);
if (!pDoc)
return 0;
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();
}
DLLEXPORT FPDF_DEST STDCALL 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, name);
}
#ifdef PDF_ENABLE_XFA
DLLEXPORT FPDF_RESULT STDCALL FPDF_BStr_Init(FPDF_BSTR* str) {
if (!str)
return -1;
FXSYS_memset(str, 0, sizeof(FPDF_BSTR));
return 0;
}
DLLEXPORT FPDF_RESULT STDCALL FPDF_BStr_Set(FPDF_BSTR* str,
FPDF_LPCSTR bstr,
int length) {
if (!str)
return -1;
if (!bstr || !length)
return -1;
if (length == -1)
length = FXSYS_strlen(bstr);
if (length == 0) {
if (str->str) {
FX_Free(str->str);
str->str = nullptr;
}
str->len = 0;
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;
FXSYS_memcpy(str->str, bstr, length);
str->len = length;
return 0;
}
DLLEXPORT FPDF_RESULT STDCALL 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
DLLEXPORT FPDF_DEST STDCALL 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;
CPDF_Dictionary* pRoot = pDoc->GetRoot();
if (!pRoot)
return nullptr;
CPDF_Object* pDestObj = nullptr;
CFX_ByteString bsName;
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;
for (const auto& it : *pDest) {
bsName = it.first;
pDestObj = it.second.get();
if (!pDestObj)
continue;
if (i == index)
break;
i++;
}
} else {
pDestObj = nameTree.LookupValue(index, bsName);
}
if (!pDestObj)
return nullptr;
if (CPDF_Dictionary* pDict = pDestObj->AsDictionary()) {
pDestObj = pDict->GetArrayFor("D");
if (!pDestObj)
return nullptr;
}
if (!pDestObj->IsArray())
return nullptr;
CFX_WideString wsName = PDF_DecodeText(bsName);
CFX_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;
}