// 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 "core/include/fxcodec/fx_codec.h"
#include "core/include/fxcrt/fx_safe_types.h"
#include "fpdfsdk/include/fsdk_define.h"
#include "fpdfsdk/include/fsdk_mgr.h"
#include "fpdfsdk/include/fsdk_rendercontext.h"
#include "fpdfsdk/include/javascript/IJavaScript.h"
#include "public/fpdf_ext.h"
#include "public/fpdf_progressive.h"
#include "third_party/base/numerics/safe_conversions_impl.h"
#ifdef PDF_ENABLE_XFA
#include "core/include/fpdfapi/fpdf_module.h"
#include "fpdfsdk/include/fpdfxfa/fpdfxfa_app.h"
#include "fpdfsdk/include/fpdfxfa/fpdfxfa_doc.h"
#include "fpdfsdk/include/fpdfxfa/fpdfxfa_page.h"
#include "fpdfsdk/include/fpdfxfa/fpdfxfa_util.h"
#include "public/fpdf_formfill.h"
#endif // PDF_ENABLE_XFA
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_Document(doc, CPDFXFA_App::GetInstance()))
: 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
}
#ifdef PDF_ENABLE_XFA
CFPDF_FileStream::CFPDF_FileStream(FPDF_FILEHANDLER* pFS) {
m_pFS = pFS;
m_nCurPos = 0;
}
IFX_FileStream* CFPDF_FileStream::Retain() {
return this;
}
void CFPDF_FileStream::Release() {
if (m_pFS && m_pFS->Release)
m_pFS->Release(m_pFS->clientData);
delete this;
}
FX_FILESIZE CFPDF_FileStream::GetSize() {
if (m_pFS && m_pFS->GetSize)
return (FX_FILESIZE)m_pFS->GetSize(m_pFS->clientData);
return 0;
}
FX_BOOL CFPDF_FileStream::IsEOF() {
return m_nCurPos >= GetSize();
}
FX_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;
}
FX_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;
}
FX_BOOL CFPDF_FileStream::Flush() {
if (!m_pFS || !m_pFS->Flush)
return TRUE;
return m_pFS->Flush(m_pFS->clientData) == 0;
}
#endif // PDF_ENABLE_XFA
CPDF_CustomAccess::CPDF_CustomAccess(FPDF_FILEACCESS* pFileAccess) {
m_FileAccess = *pFileAccess;
#ifdef PDF_ENABLE_XFA
m_BufferOffset = (FX_DWORD)-1;
#endif // PDF_ENABLE_XFA
}
#ifdef PDF_ENABLE_XFA
FX_BOOL CPDF_CustomAccess::GetByte(FX_DWORD pos, uint8_t& ch) {
if (pos >= m_FileAccess.m_FileLen)
return FALSE;
if (m_BufferOffset == (FX_DWORD)-1 || pos < m_BufferOffset ||
pos >= m_BufferOffset + 512) {
// Need to read from file access
m_BufferOffset = pos;
int size = 512;
if (pos + 512 > m_FileAccess.m_FileLen)
size = m_FileAccess.m_FileLen - pos;
if (!m_FileAccess.m_GetBlock(m_FileAccess.m_Param, m_BufferOffset, m_Buffer,
size))
return FALSE;
}
ch = m_Buffer[pos - m_BufferOffset];
return TRUE;
}
FX_BOOL CPDF_CustomAccess::GetBlock(FX_DWORD pos,
uint8_t* pBuf,
FX_DWORD size) {
if (pos + size > m_FileAccess.m_FileLen)
return FALSE;
return m_FileAccess.m_GetBlock(m_FileAccess.m_Param, pos, pBuf, size);
}
#endif // PDF_ENABLE_XFA
FX_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_t>(size);
newPos += offset;
if (!newPos.IsValid() || newPos.ValueOrDie() > m_FileAccess.m_FileLen) {
return FALSE;
}
return m_FileAccess.m_GetBlock(m_FileAccess.m_Param, offset, (uint8_t*)buffer,
size);
}
// 0 bit: FPDF_POLICY_MACHINETIME_ACCESS
static FX_DWORD 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;
}
}
CCodec_ModuleMgr* g_pCodecModule = nullptr;
DLLEXPORT void STDCALL FPDF_InitLibrary() {
FPDF_InitLibraryWithConfig(nullptr);
}
DLLEXPORT void STDCALL FPDF_InitLibraryWithConfig(
const FPDF_LIBRARY_CONFIG* cfg) {
g_pCodecModule = new CCodec_ModuleMgr();
CFX_GEModule::Create(cfg ? cfg->m_pUserFontPaths : nullptr);
CFX_GEModule::Get()->SetCodecModule(g_pCodecModule);
CPDF_ModuleMgr::Create();
CPDF_ModuleMgr* pModuleMgr = CPDF_ModuleMgr::Get();
pModuleMgr->SetCodecModule(g_pCodecModule);
pModuleMgr->InitPageModule();
pModuleMgr->InitRenderModule();
#ifdef PDF_ENABLE_XFA
CPDFXFA_App::GetInstance()->Initialize();
#else // PDF_ENABLE_XFA
pModuleMgr->LoadEmbeddedGB1CMaps();
pModuleMgr->LoadEmbeddedJapan1CMaps();
pModuleMgr->LoadEmbeddedCNS1CMaps();
pModuleMgr->LoadEmbeddedKorea1CMaps();
#endif // PDF_ENABLE_XFA
if (cfg && cfg->version >= 2)
IJS_Runtime::Initialize(cfg->m_v8EmbedderSlot, cfg->m_pIsolate);
}
DLLEXPORT void STDCALL FPDF_DestroyLibrary() {
#ifdef PDF_ENABLE_XFA
CPDFXFA_App::ReleaseInstance();
#endif // PDF_ENABLE_XFA
CPDF_ModuleMgr::Destroy();
CFX_GEModule::Destroy();
delete g_pCodecModule;
g_pCodecModule = nullptr;
}
#ifndef _WIN32
int g_LastError;
void SetLastError(int err) {
g_LastError = err;
}
int GetLastError() {
return g_LastError;
}
#endif // _WIN32
void ProcessParseError(FX_DWORD err_code) {
// Translate FPDFAPI error code to FPDFVIEW error code
switch (err_code) {
case PDFPARSE_ERROR_FILE:
err_code = FPDF_ERR_FILE;
break;
case PDFPARSE_ERROR_FORMAT:
err_code = FPDF_ERR_FORMAT;
break;
case PDFPARSE_ERROR_PASSWORD:
err_code = FPDF_ERR_PASSWORD;
break;
case PDFPARSE_ERROR_HANDLER:
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);
}
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.
IFX_FileRead* pFileAccess = FX_CreateFileRead((const FX_CHAR*)file_path);
if (!pFileAccess) {
return nullptr;
}
CPDF_Parser* pParser = new CPDF_Parser;
pParser->SetPassword(password);
FX_DWORD err_code = pParser->StartParse(pFileAccess);
if (err_code) {
delete pParser;
ProcessParseError(err_code);
return NULL;
}
#ifdef PDF_ENABLE_XFA
CPDF_Document* pPDFDoc = pParser->GetDocument();
if (!pPDFDoc)
return NULL;
CPDFXFA_App* pProvider = CPDFXFA_App::GetInstance();
return new CPDFXFA_Document(pPDFDoc, pProvider);
#else // PDF_ENABLE_XFA
return pParser->GetDocument();
#endif // PDF_ENABLE_XFA
}
#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_Document*>(document))->GetPDFDoc();
if (!pdfDoc)
return FALSE;
CPDF_Dictionary* pRoot = pdfDoc->GetRoot();
if (!pRoot)
return FALSE;
CPDF_Dictionary* pAcroForm = pRoot->GetDict("AcroForm");
if (!pAcroForm)
return FALSE;
CPDF_Object* pXFA = pAcroForm->GetElement("XFA");
if (!pXFA)
return FALSE;
FX_BOOL bDynamicXFA = pRoot->GetBoolean("NeedsRendering", FALSE);
if (bDynamicXFA)
*docType = DOCTYPE_DYNAMIC_XFA;
else
*docType = DOCTYPE_STATIC_XFA;
return TRUE;
}
DLLEXPORT FPDF_BOOL STDCALL FPDF_LoadXFA(FPDF_DOCUMENT document) {
return document && (static_cast<CPDFXFA_Document*>(document))->LoadXFADoc();
}
#endif // PDF_ENABLE_XFA
class CMemFile final : public IFX_FileRead {
public:
CMemFile(uint8_t* pBuf, FX_FILESIZE size) : m_pBuf(pBuf), m_size(size) {}
void Release() override { delete this; }
FX_FILESIZE GetSize() override { return m_size; }
FX_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_t>(size);
newPos += offset;
if (!newPos.IsValid() || newPos.ValueOrDie() > (FX_DWORD)m_size) {
return FALSE;
}
FXSYS_memcpy(buffer, m_pBuf + offset, size);
return TRUE;
}
private:
~CMemFile() override {}
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) {
CPDF_Parser* pParser = new CPDF_Parser;
pParser->SetPassword(password);
CMemFile* pMemFile = new CMemFile((uint8_t*)data_buf, size);
FX_DWORD err_code = pParser->StartParse(pMemFile);
if (err_code) {
delete pParser;
ProcessParseError(err_code);
return NULL;
}
CPDF_Document* pDoc = NULL;
pDoc = pParser ? pParser->GetDocument() : NULL;
CheckUnSupportError(pDoc, err_code);
return FPDFDocumentFromCPDFDocument(pParser->GetDocument());
}
DLLEXPORT FPDF_DOCUMENT STDCALL
FPDF_LoadCustomDocument(FPDF_FILEACCESS* pFileAccess,
FPDF_BYTESTRING password) {
CPDF_Parser* pParser = new CPDF_Parser;
pParser->SetPassword(password);
CPDF_CustomAccess* pFile = new CPDF_CustomAccess(pFileAccess);
FX_DWORD err_code = pParser->StartParse(pFile);
if (err_code) {
delete pParser;
ProcessParseError(err_code);
return NULL;
}
CPDF_Document* pDoc = NULL;
pDoc = pParser ? pParser->GetDocument() : NULL;
CheckUnSupportError(pDoc, err_code);
return FPDFDocumentFromCPDFDocument(pParser->GetDocument());
}
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 FX_DWORD to build on Linux (and match
// header).
DLLEXPORT unsigned long STDCALL FPDF_GetDocPermissions(FPDF_DOCUMENT document) {
CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document);
if (!pDoc)
#ifndef PDF_ENABLE_XFA
return 0;
#else // PDF_ENABLE_XFA
return (FX_DWORD)-1;
#endif // PDF_ENABLE_XFA
CPDF_Dictionary* pDict = pDoc->GetParser()->GetEncryptDict();
return pDict ? pDict->GetInteger("P") : (FX_DWORD)-1;
}
DLLEXPORT int STDCALL FPDF_GetSecurityHandlerRevision(FPDF_DOCUMENT document) {
CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document);
if (!pDoc)
return -1;
CPDF_Dictionary* pDict = pDoc->GetParser()->GetEncryptDict();
return pDict ? pDict->GetInteger("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->GetPage(page_index);
#else // PDF_ENABLE_XFA
CPDF_Dictionary* pDict = pDoc->GetPage(page_index);
if (!pDict)
return NULL;
CPDF_Page* pPage = new CPDF_Page;
pPage->Load(pDoc, pDict);
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;
}
void DropContext(void* data) {
delete (CRenderContext*)data;
}
#if defined(_DEBUG) || defined(DEBUG)
#define DEBUG_TRACE
#endif
#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;
CRenderContext* pContext = new CRenderContext;
pPage->SetPrivateData((void*)1, pContext, DropContext);
#ifndef _WIN32_WCE
CFX_DIBitmap* pBitmap = nullptr;
FX_BOOL bBackgroundAlphaNeeded = pPage->BackgroundAlphaNeeded();
FX_BOOL bHasImageMask = pPage->HasImageMask();
if (bBackgroundAlphaNeeded || bHasImageMask) {
pBitmap = new CFX_DIBitmap;
pBitmap->Create(size_x, size_y, FXDIB_Argb);
pBitmap->Clear(0x00ffffff);
#ifdef _SKIA_SUPPORT_
pContext->m_pDevice = new CFX_SkiaDevice;
((CFX_SkiaDevice*)pContext->m_pDevice)->Attach((CFX_DIBitmap*)pBitmap);
#else
pContext->m_pDevice = new CFX_FxgeDevice;
((CFX_FxgeDevice*)pContext->m_pDevice)->Attach((CFX_DIBitmap*)pBitmap);
#endif
} else {
pContext->m_pDevice = new CFX_WindowsDevice(dc);
}
FPDF_RenderPage_Retail(pContext, page, start_x, start_y, size_x, size_y,
rotate, flags, TRUE, NULL);
if (bBackgroundAlphaNeeded || bHasImageMask) {
if (pBitmap) {
CFX_WindowsDevice WinDC(dc);
if (WinDC.GetDeviceCaps(FXDC_DEVICE_CLASS) == FXDC_PRINTER) {
CFX_DIBitmap* pDst = new 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, 0, 0,
FXDIB_BLEND_NORMAL, NULL, FALSE, NULL);
WinDC.StretchDIBits(pDst, 0, 0, size_x, size_y);
delete pDst;
} else {
WinDC.SetDIBits(pBitmap, 0, 0);
}
}
}
#else
// get clip region
RECT rect, cliprect;
rect.left = start_x;
rect.top = start_y;
rect.right = start_x + size_x;
rect.bottom = start_y + size_y;
GetClipBox(dc, &cliprect);
IntersectRect(&rect, &rect, &cliprect);
int width = rect.right - rect.left;
int height = rect.bottom - rect.top;
#ifdef DEBUG_TRACE
{
char str[128];
memset(str, 0, sizeof(str));
FXSYS_snprintf(str, sizeof(str) - 1, "Rendering DIB %d x %d", width,
height);
CPDF_ModuleMgr::Get()->ReportError(999, str);
}
#endif
// Create a DIB section
LPVOID pBuffer;
BITMAPINFOHEADER bmih;
FXSYS_memset(&bmih, 0, sizeof bmih);
bmih.biSize = sizeof bmih;
bmih.biBitCount = 24;
bmih.biHeight = -height;
bmih.biPlanes = 1;
bmih.biWidth = width;
pContext->m_hBitmap = CreateDIBSection(dc, (BITMAPINFO*)&bmih, DIB_RGB_COLORS,
&pBuffer, NULL, 0);
if (!pContext->m_hBitmap) {
#if defined(DEBUG) || defined(_DEBUG)
char str[128];
memset(str, 0, sizeof(str));
FXSYS_snprintf(str, sizeof(str) - 1,
"Error CreateDIBSection: %d x %d, error code = %d", width,
height, GetLastError());
CPDF_ModuleMgr::Get()->ReportError(FPDFERR_OUT_OF_MEMORY, str);
#else
CPDF_ModuleMgr::Get()->ReportError(FPDFERR_OUT_OF_MEMORY, NULL);
#endif
}
FXSYS_memset(pBuffer, 0xff, height * ((width * 3 + 3) / 4 * 4));
#ifdef DEBUG_TRACE
{ CPDF_ModuleMgr::Get()->ReportError(999, "DIBSection created"); }
#endif
// Create a device with this external buffer
pContext->m_pBitmap = new CFX_DIBitmap;
pContext->m_pBitmap->Create(width, height, FXDIB_Rgb, (uint8_t*)pBuffer);
pContext->m_pDevice = new CPDF_FxgeDevice;
((CPDF_FxgeDevice*)pContext->m_pDevice)->Attach(pContext->m_pBitmap);
#ifdef DEBUG_TRACE
CPDF_ModuleMgr::Get()->ReportError(999, "Ready for PDF rendering");
#endif
// output to bitmap device
FPDF_RenderPage_Retail(pContext, page, start_x - rect.left,
start_y - rect.top, size_x, size_y, rotate, flags);
#ifdef DEBUG_TRACE
CPDF_ModuleMgr::Get()->ReportError(999, "Finished PDF rendering");
#endif
// Now output to real device
HDC hMemDC = CreateCompatibleDC(dc);
if (!hMemDC) {
#if defined(DEBUG) || defined(_DEBUG)
char str[128];
memset(str, 0, sizeof(str));
FXSYS_snprintf(str, sizeof(str) - 1,
"Error CreateCompatibleDC. Error code = %d", GetLastError());
CPDF_ModuleMgr::Get()->ReportError(FPDFERR_OUT_OF_MEMORY, str);
#else
CPDF_ModuleMgr::Get()->ReportError(FPDFERR_OUT_OF_MEMORY, NULL);
#endif
}
HGDIOBJ hOldBitmap = SelectObject(hMemDC, pContext->m_hBitmap);
#ifdef DEBUG_TRACE
CPDF_ModuleMgr::Get()->ReportError(999, "Ready for screen rendering");
#endif
BitBlt(dc, rect.left, rect.top, width, height, hMemDC, 0, 0, SRCCOPY);
SelectObject(hMemDC, hOldBitmap);
DeleteDC(hMemDC);
#ifdef DEBUG_TRACE
CPDF_ModuleMgr::Get()->ReportError(999, "Finished screen rendering");
#endif
#endif
if (bBackgroundAlphaNeeded || bHasImageMask)
delete pBitmap;
delete pContext;
pPage->RemovePrivateData((void*)1);
}
#endif
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;
CRenderContext* pContext = new CRenderContext;
pPage->SetPrivateData((void*)1, pContext, DropContext);
#ifdef _SKIA_SUPPORT_
pContext->m_pDevice = new CFX_SkiaDevice;
if (flags & FPDF_REVERSE_BYTE_ORDER)
((CFX_SkiaDevice*)pContext->m_pDevice)
->Attach((CFX_DIBitmap*)bitmap, 0, TRUE);
else
((CFX_SkiaDevice*)pContext->m_pDevice)->Attach((CFX_DIBitmap*)bitmap);
#else
pContext->m_pDevice = new CFX_FxgeDevice;
if (flags & FPDF_REVERSE_BYTE_ORDER)
((CFX_FxgeDevice*)pContext->m_pDevice)
->Attach((CFX_DIBitmap*)bitmap, 0, TRUE);
else
((CFX_FxgeDevice*)pContext->m_pDevice)->Attach((CFX_DIBitmap*)bitmap);
#endif
FPDF_RenderPage_Retail(pContext, page, start_x, start_y, size_x, size_y,
rotate, flags, TRUE, NULL);
delete pContext;
pPage->RemovePrivateData((void*)1);
}
DLLEXPORT void STDCALL FPDF_ClosePage(FPDF_PAGE page) {
if (!page)
return;
#ifdef PDF_ENABLE_XFA
CPDFXFA_Page* pPage = (CPDFXFA_Page*)page;
pPage->Release();
#else // PDF_ENABLE_XFA
CPDFSDK_PageView* pPageView =
(CPDFSDK_PageView*)(((CPDF_Page*)page))->GetPrivateData((void*)page);
if (pPageView && pPageView->IsLocked()) {
pPageView->TakeOverPage();
return;
}
delete (CPDF_Page*)page;
#endif // PDF_ENABLE_XFA
}
DLLEXPORT void STDCALL FPDF_CloseDocument(FPDF_DOCUMENT document) {
#ifdef PDF_ENABLE_XFA
delete UnderlyingFromFPDFDocument(document);
#else // PDF_ENABLE_XFA
CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document);
if (!pDoc)
return;
CPDF_Parser* pParser = pDoc->GetParser();
if (!pParser) {
delete pDoc;
return;
}
delete pParser;
#endif // PDF_ENABLE_XFA
}
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) {
std::unique_ptr<CFX_DIBitmap> pBitmap(new CFX_DIBitmap);
if (!pBitmap->Create(width, height, alpha ? FXDIB_Argb : FXDIB_Rgb32)) {
return NULL;
}
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 NULL;
}
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;
#ifdef _SKIA_SUPPORT_
CFX_SkiaDevice device;
#else
CFX_FxgeDevice device;
#endif
device.Attach((CFX_DIBitmap*)bitmap);
if (!((CFX_DIBitmap*)bitmap)->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 ? ((CFX_DIBitmap*)bitmap)->GetBuffer() : nullptr;
}
DLLEXPORT int STDCALL FPDFBitmap_GetWidth(FPDF_BITMAP bitmap) {
return bitmap ? ((CFX_DIBitmap*)bitmap)->GetWidth() : 0;
}
DLLEXPORT int STDCALL FPDFBitmap_GetHeight(FPDF_BITMAP bitmap) {
return bitmap ? ((CFX_DIBitmap*)bitmap)->GetHeight() : 0;
}
DLLEXPORT int STDCALL FPDFBitmap_GetStride(FPDF_BITMAP bitmap) {
return bitmap ? ((CFX_DIBitmap*)bitmap)->GetPitch() : 0;
}
DLLEXPORT void STDCALL FPDFBitmap_Destroy(FPDF_BITMAP bitmap) {
delete (CFX_DIBitmap*)bitmap;
}
void FPDF_RenderPage_Retail(CRenderContext* pContext,
FPDF_PAGE page,
int start_x,
int start_y,
int size_x,
int size_y,
int rotate,
int flags,
FX_BOOL bNeedToRestore,
IFSDK_PAUSE_Adapter* pause) {
CPDF_Page* pPage = CPDFPageFromFPDFPage(page);
if (!pPage)
return;
if (!pContext->m_pOptions)
pContext->m_pOptions = new 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);
CFX_Matrix matrix;
pPage->GetDisplayMatrix(matrix, start_x, start_y, size_x, size_y, rotate);
FX_RECT clip;
clip.left = start_x;
clip.right = start_x + size_x;
clip.top = start_y;
clip.bottom = start_y + size_y;
pContext->m_pDevice->SaveState();
pContext->m_pDevice->SetClip_Rect(&clip);
pContext->m_pContext = new CPDF_RenderContext(pPage);
pContext->m_pContext->AppendObjectList(pPage, &matrix);
if (flags & FPDF_ANNOT) {
pContext->m_pAnnots = new CPDF_AnnotList(pPage);
FX_BOOL bPrinting = pContext->m_pDevice->GetDeviceClass() != FXDC_DISPLAY;
pContext->m_pAnnots->DisplayAnnots(pPage, pContext->m_pContext, bPrinting,
&matrix, TRUE, NULL);
}
pContext->m_pRenderer = new CPDF_ProgressiveRenderer(
pContext->m_pContext, pContext->m_pDevice, pContext->m_pOptions);
pContext->m_pRenderer->Start(pause);
if (bNeedToRestore)
pContext->m_pDevice->RestoreState();
}
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->GetPage(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;
page.Load(pDoc, pDict);
*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 NULL;
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 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->GetDict("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
FPDF_RESULT FPDF_BStr_Init(FPDF_BSTR* str) {
if (!str)
return -1;
FXSYS_memset(str, 0, sizeof(FPDF_BSTR));
return 0;
}
FPDF_RESULT 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 = NULL;
}
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;
if (str->str == NULL)
return -1;
FXSYS_memcpy(str->str, bstr, length);
str->len = length;
return 0;
}
FPDF_RESULT FPDF_BStr_Clear(FPDF_BSTR* str) {
if (!str)
return -1;
if (str->str) {
FX_Free(str->str);
str->str = NULL;
}
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->GetDict("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;
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->GetArray("D");
if (!pDestObj)
return nullptr;
}
if (!pDestObj->IsArray())
return nullptr;
CFX_WideString wsName = PDF_DecodeText(bsName);
CFX_ByteString utf16Name = wsName.UTF16LE_Encode();
unsigned int len = utf16Name.GetLength();
if (!buffer) {
*buflen = len;
} else if (*buflen >= len) {
memcpy(buffer, utf16Name.c_str(), len);
*buflen = len;
} else {
*buflen = -1;
}
return (FPDF_DEST)pDestObj;
}