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gerrit-public.fairphone.software / platform / external / pdfium / 5e2cfb5310c9b25a5ce4c772a6656373309bc956 / . / fpdfsdk / fpdfview.cpp
blob: 40851176e2ed21eefeea0c711cc55f1cf6d178bb [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 <vector>
#include "core/fpdfapi/cpdf_modulemgr.h"
#include "core/fpdfapi/cpdf_pagerendercontext.h"
#include "core/fpdfapi/page/cpdf_image.h"
#include "core/fpdfapi/page/cpdf_imageobject.h"
#include "core/fpdfapi/page/cpdf_page.h"
#include "core/fpdfapi/page/cpdf_pageobject.h"
#include "core/fpdfapi/page/cpdf_pathobject.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/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/fxcrt/fx_memory.h"
#include "core/fxcrt/fx_safe_types.h"
#include "core/fxcrt/fx_stream.h"
#include "core/fxge/cfx_defaultrenderdevice.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_edit.h"
#include "public/fpdf_ext.h"
#include "public/fpdf_progressive.h"
#include "third_party/base/allocator/partition_allocator/partition_alloc.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 "fxbarcode/BC_Library.h"
#include "public/fpdf_formfill.h"
#endif // PDF_ENABLE_XFA
#if _FX_PLATFORM_ == _FX_PLATFORM_WINDOWS_
#include "core/fxge/cfx_windowsrenderdevice.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,
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 = CPDF_RenderOptions::kGray;
const CPDF_OCContext::UsageType usage =
(flags & FPDF_PRINTING) ? CPDF_OCContext::Print : CPDF_OCContext::View;
pContext->m_pOptions->m_pOCContext =
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);
}
class CPDF_CustomAccess final : public IFX_SeekableReadStream {
public:
template <typename T, typename... Args>
friend RetainPtr<T> pdfium::MakeRetain(Args&&... args);
// 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,
static_cast<uint8_t*>(buffer), size);
}
#ifdef PDF_ENABLE_XFA
class FPDF_FileHandlerContext : public IFX_SeekableStream {
public:
template <typename T, typename... Args>
friend RetainPtr<T> pdfium::MakeRetain(Args&&... args);
~FPDF_FileHandlerContext() 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 FPDF_FileHandlerContext(FPDF_FILEHANDLER* pFS);
FPDF_FILEHANDLER* m_pFS;
FX_FILESIZE m_nCurPos;
};
FPDF_FileHandlerContext::FPDF_FileHandlerContext(FPDF_FILEHANDLER* pFS) {
m_pFS = pFS;
m_nCurPos = 0;
}
FPDF_FileHandlerContext::~FPDF_FileHandlerContext() {
if (m_pFS && m_pFS->Release)
m_pFS->Release(m_pFS->clientData);
}
FX_FILESIZE FPDF_FileHandlerContext::GetSize() {
if (m_pFS && m_pFS->GetSize)
return (FX_FILESIZE)m_pFS->GetSize(m_pFS->clientData);
return 0;
}
bool FPDF_FileHandlerContext::IsEOF() {
return m_nCurPos >= GetSize();
}
FX_FILESIZE FPDF_FileHandlerContext::GetPosition() {
return m_nCurPos;
}
bool FPDF_FileHandlerContext::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 FPDF_FileHandlerContext::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 = static_cast<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 FPDF_FileHandlerContext::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 FPDF_FileHandlerContext::Flush() {
if (!m_pFS || !m_pFS->Flush)
return true;
return m_pFS->Flush(m_pFS->clientData) == 0;
}
#endif // PDF_ENABLE_XFA
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
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
}
CPDF_PathObject* CPDFPathObjectFromFPDFPageObject(FPDF_PAGEOBJECT page_object) {
auto* obj = CPDFPageObjectFromFPDFPageObject(page_object);
return obj ? obj->AsPath() : nullptr;
}
CPDF_PageObject* CPDFPageObjectFromFPDFPageObject(FPDF_PAGEOBJECT page_object) {
return static_cast<CPDF_PageObject*>(page_object);
}
CPDF_Object* CPDFObjectFromFPDFAttachment(FPDF_ATTACHMENT attachment) {
return static_cast<CPDF_Object*>(attachment);
}
ByteString CFXByteStringFromFPDFWideString(FPDF_WIDESTRING wide_string) {
return WideString::FromUTF16LE(wide_string,
WideString::WStringLength(wide_string))
.UTF8Encode();
}
CFX_DIBitmap* CFXBitmapFromFPDFBitmap(FPDF_BITMAP bitmap) {
return static_cast<CFX_DIBitmap*>(bitmap);
}
const FX_PATHPOINT* FXPathPointFromFPDFPathSegment(FPDF_PATHSEGMENT segment) {
return static_cast<const FX_PATHPOINT*>(segment);
}
unsigned long Utf16EncodeMaybeCopyAndReturnLength(const WideString& text,
void* buffer,
unsigned long buflen) {
ByteString encoded_text = text.UTF16LE_Encode();
unsigned long len = encoded_text.GetLength();
if (buffer && len <= buflen)
memcpy(buffer, encoded_text.c_str(), len);
return len;
}
unsigned long DecodeStreamMaybeCopyAndReturnLength(const CPDF_Stream* stream,
void* buffer,
unsigned long buflen) {
ASSERT(stream);
uint8_t* data = stream->GetRawData();
uint32_t len = stream->GetRawSize();
CPDF_Dictionary* dict = stream->GetDict();
CPDF_Object* decoder = dict ? dict->GetDirectObjectFor("Filter") : nullptr;
if (decoder && (decoder->IsArray() || decoder->IsName())) {
// Decode the stream if one or more stream filters are specified.
uint8_t* decoded_data = nullptr;
uint32_t decoded_len = 0;
ByteString dummy_last_decoder;
CPDF_Dictionary* dummy_last_param;
if (PDF_DataDecode(data, len, dict, dict->GetIntegerFor("DL"), false,
&decoded_data, &decoded_len, &dummy_last_decoder,
&dummy_last_param)) {
if (buffer && buflen >= decoded_len)
memcpy(buffer, decoded_data, decoded_len);
// Free the buffer for the decoded data if it was allocated by
// PDF_DataDecode(). Note that for images with a single image-specific
// filter, |decoded_data| is directly assigned to be |data|, so
// |decoded_data| does not need to be freed.
if (decoded_data != data)
FX_Free(decoded_data);
return decoded_len;
}
}
// Copy the raw data and return its length if there is no valid filter
// specified or if decoding failed.
if (buffer && buflen >= len)
memcpy(buffer, data, len);
return len;
}
RetainPtr<IFX_SeekableReadStream> MakeSeekableReadStream(
FPDF_FILEACCESS* pFileAccess) {
return pdfium::MakeRetain<CPDF_CustomAccess>(pFileAccess);
}
#ifdef PDF_ENABLE_XFA
RetainPtr<IFX_SeekableStream> MakeSeekableStream(
FPDF_FILEHANDLER* pFilehandler) {
return pdfium::MakeRetain<FPDF_FileHandlerContext>(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;
}
}
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
FXJSE_Initialize();
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();
FXJSE_Finalize();
#endif // PDF_ENABLE_XFA
CPDF_ModuleMgr::Destroy();
CFX_GEModule::Destroy();
IJS_Runtime::Destroy();
g_bLibraryInitialized = false;
}
#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);
}
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((const char*)file_path),
password);
}
#ifdef PDF_ENABLE_XFA
FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FPDF_HasXFAField(FPDF_DOCUMENT document,
int* docType) {
if (!document)
return false;
const CPDF_Document* pDoc =
static_cast<CPDFXFA_Context*>(document)->GetPDFDoc();
if (!pDoc)
return false;
const CPDF_Dictionary* pRoot = pDoc->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;
}
FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV 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 RetainPtr<CMemFile> Create(uint8_t* pBuf, FX_FILESIZE size) {
return 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;
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;
};
FPDF_EXPORT FPDF_DOCUMENT FPDF_CALLCONV
FPDF_LoadMemDocument(const void* data_buf, int size, FPDF_BYTESTRING password) {
return LoadDocumentImpl(CMemFile::Create((uint8_t*)data_buf, size), password);
}
FPDF_EXPORT FPDF_DOCUMENT FPDF_CALLCONV
FPDF_LoadCustomDocument(FPDF_FILEACCESS* pFileAccess,
FPDF_BYTESTRING password) {
return LoadDocumentImpl(pdfium::MakeRetain<CPDF_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;
}
#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,
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.
const bool bNewBitmap =
pPage->BackgroundAlphaNeeded() ||
(pPage->HasImageMask() && 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>();
pContext->m_pOptions->m_Flags |= RENDER_BREAKFORMASKS;
}
} 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>();
pContext->m_pOptions->m_Flags |= RENDER_BREAKFORMASKS;
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.left = clipping->left;
clipping_rect.bottom = clipping->bottom;
clipping_rect.right = clipping->right;
clipping_rect.top = clipping->top;
}
FX_RECT clip_rect = clipping_rect.ToFxRect();
RenderPageImpl(
pContext, pPage,
pPage->GetDisplayMatrixWithTransformation(
clip_rect.left, clip_rect.top, clip_rect.Width(), clip_rect.Height(),
CFX_Matrix(matrix->a, matrix->b, matrix->c, matrix->d, matrix->e,
matrix->f)),
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, (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,
IFSDK_PAUSE_Adapter* 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)
return -1;
if (!bstr || !length)
return -1;
if (length == -1)
length = 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;
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;
}