1// Copyright 2014 PDFium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
6
7#include "public/fpdfview.h"
8
9#include <memory>
10#include <utility>
11#include <vector>
12
13#include "core/fpdfapi/cpdf_modulemgr.h"
14#include "core/fpdfapi/cpdf_pagerendercontext.h"
15#include "core/fpdfapi/page/cpdf_image.h"
16#include "core/fpdfapi/page/cpdf_imageobject.h"
17#include "core/fpdfapi/page/cpdf_page.h"
18#include "core/fpdfapi/page/cpdf_pageobject.h"
19#include "core/fpdfapi/page/cpdf_pathobject.h"
20#include "core/fpdfapi/parser/cpdf_array.h"
21#include "core/fpdfapi/parser/cpdf_dictionary.h"
22#include "core/fpdfapi/parser/cpdf_document.h"
23#include "core/fpdfapi/parser/fpdf_parser_decode.h"
24#include "core/fpdfapi/render/cpdf_progressiverenderer.h"
25#include "core/fpdfapi/render/cpdf_renderoptions.h"
26#include "core/fpdfdoc/cpdf_annotlist.h"
27#include "core/fpdfdoc/cpdf_nametree.h"
28#include "core/fpdfdoc/cpdf_occontext.h"
29#include "core/fpdfdoc/cpdf_viewerpreferences.h"
30#include "core/fxcrt/fx_memory.h"
31#include "core/fxcrt/fx_safe_types.h"
32#include "core/fxcrt/fx_stream.h"
33#include "core/fxge/cfx_defaultrenderdevice.h"
34#include "core/fxge/cfx_gemodule.h"
35#include "fpdfsdk/cpdfsdk_formfillenvironment.h"
36#include "fpdfsdk/cpdfsdk_pageview.h"
37#include "fpdfsdk/fsdk_define.h"
38#include "fpdfsdk/fsdk_pauseadapter.h"
39#include "fxjs/ijs_runtime.h"
40#include "public/fpdf_edit.h"
41#include "public/fpdf_ext.h"
42#include "public/fpdf_formfill.h"
43#include "public/fpdf_progressive.h"
44#include "third_party/base/allocator/partition_allocator/partition_alloc.h"
45#include "third_party/base/numerics/safe_conversions_impl.h"
46#include "third_party/base/ptr_util.h"
47
48#ifdef PDF_ENABLE_XFA
49#include "fpdfsdk/fpdfxfa/cpdfxfa_context.h"
50#include "fpdfsdk/fpdfxfa/cpdfxfa_page.h"
51#include "fpdfsdk/fpdfxfa/cxfa_fwladaptertimermgr.h"
52#include "fxbarcode/BC_Library.h"
53#endif  // PDF_ENABLE_XFA
54
55#if _FX_PLATFORM_ == _FX_PLATFORM_WINDOWS_
56#include "core/fxge/cfx_windowsrenderdevice.h"
57
58// These checks are here because core/ and public/ cannot depend on each other.
59static_assert(WindowsPrintMode::kModeEmf == FPDF_PRINTMODE_EMF,
60              "WindowsPrintMode::kModeEmf value mismatch");
61static_assert(WindowsPrintMode::kModeTextOnly == FPDF_PRINTMODE_TEXTONLY,
62              "WindowsPrintMode::kModeTextOnly value mismatch");
63static_assert(WindowsPrintMode::kModePostScript2 == FPDF_PRINTMODE_POSTSCRIPT2,
64              "WindowsPrintMode::kModePostScript2 value mismatch");
65static_assert(WindowsPrintMode::kModePostScript3 == FPDF_PRINTMODE_POSTSCRIPT3,
66              "WindowsPrintMode::kModePostScript3 value mismatch");
67#endif
68
69namespace {
70
71bool g_bLibraryInitialized = false;
72
73void RenderPageImpl(CPDF_PageRenderContext* pContext,
74                    CPDF_Page* pPage,
75                    const CFX_Matrix& matrix,
76                    const FX_RECT& clipping_rect,
77                    int flags,
78                    bool bNeedToRestore,
79                    IFSDK_PAUSE_Adapter* pause) {
80  if (!pContext->m_pOptions)
81    pContext->m_pOptions = pdfium::MakeUnique<CPDF_RenderOptions>();
82
83  uint32_t option_flags = pContext->m_pOptions->GetFlags();
84  if (flags & FPDF_LCD_TEXT)
85    option_flags |= RENDER_CLEARTYPE;
86  else
87    option_flags &= ~RENDER_CLEARTYPE;
88
89  if (flags & FPDF_NO_NATIVETEXT)
90    option_flags |= RENDER_NO_NATIVETEXT;
91  if (flags & FPDF_RENDER_LIMITEDIMAGECACHE)
92    option_flags |= RENDER_LIMITEDIMAGECACHE;
93  if (flags & FPDF_RENDER_FORCEHALFTONE)
94    option_flags |= RENDER_FORCE_HALFTONE;
95#ifndef PDF_ENABLE_XFA
96  if (flags & FPDF_RENDER_NO_SMOOTHTEXT)
97    option_flags |= RENDER_NOTEXTSMOOTH;
98  if (flags & FPDF_RENDER_NO_SMOOTHIMAGE)
99    option_flags |= RENDER_NOIMAGESMOOTH;
100  if (flags & FPDF_RENDER_NO_SMOOTHPATH)
101    option_flags |= RENDER_NOPATHSMOOTH;
102#endif  // PDF_ENABLE_XFA
103  pContext->m_pOptions->SetFlags(option_flags);
104
105  // Grayscale output
106  if (flags & FPDF_GRAYSCALE)
107    pContext->m_pOptions->SetColorMode(CPDF_RenderOptions::kGray);
108
109  const CPDF_OCContext::UsageType usage =
110      (flags & FPDF_PRINTING) ? CPDF_OCContext::Print : CPDF_OCContext::View;
111  pContext->m_pOptions->SetOCContext(
112      pdfium::MakeRetain<CPDF_OCContext>(pPage->m_pDocument.Get(), usage));
113
114  pContext->m_pDevice->SaveState();
115  pContext->m_pDevice->SetClip_Rect(clipping_rect);
116  pContext->m_pContext = pdfium::MakeUnique<CPDF_RenderContext>(pPage);
117  pContext->m_pContext->AppendLayer(pPage, &matrix);
118
119  if (flags & FPDF_ANNOT) {
120    pContext->m_pAnnots = pdfium::MakeUnique<CPDF_AnnotList>(pPage);
121    bool bPrinting = pContext->m_pDevice->GetDeviceClass() != FXDC_DISPLAY;
122    pContext->m_pAnnots->DisplayAnnots(pPage, pContext->m_pContext.get(),
123                                       bPrinting, &matrix, false, nullptr);
124  }
125
126  pContext->m_pRenderer = pdfium::MakeUnique<CPDF_ProgressiveRenderer>(
127      pContext->m_pContext.get(), pContext->m_pDevice.get(),
128      pContext->m_pOptions.get());
129  pContext->m_pRenderer->Start(pause);
130  if (bNeedToRestore)
131    pContext->m_pDevice->RestoreState(false);
132}
133
134class CPDF_CustomAccess final : public IFX_SeekableReadStream {
135 public:
136  template <typename T, typename... Args>
137  friend RetainPtr<T> pdfium::MakeRetain(Args&&... args);
138
139  // IFX_SeekableReadStream
140  FX_FILESIZE GetSize() override;
141  bool ReadBlock(void* buffer, FX_FILESIZE offset, size_t size) override;
142
143 private:
144  explicit CPDF_CustomAccess(FPDF_FILEACCESS* pFileAccess);
145
146  FPDF_FILEACCESS m_FileAccess;
147};
148
149CPDF_CustomAccess::CPDF_CustomAccess(FPDF_FILEACCESS* pFileAccess)
150    : m_FileAccess(*pFileAccess) {}
151
152FX_FILESIZE CPDF_CustomAccess::GetSize() {
153  return m_FileAccess.m_FileLen;
154}
155
156bool CPDF_CustomAccess::ReadBlock(void* buffer,
157                                  FX_FILESIZE offset,
158                                  size_t size) {
159  if (offset < 0)
160    return false;
161
162  FX_SAFE_FILESIZE newPos = pdfium::base::checked_cast<FX_FILESIZE>(size);
163  newPos += offset;
164  if (!newPos.IsValid() ||
165      newPos.ValueOrDie() > static_cast<FX_FILESIZE>(m_FileAccess.m_FileLen)) {
166    return false;
167  }
168  return !!m_FileAccess.m_GetBlock(m_FileAccess.m_Param, offset,
169                                   static_cast<uint8_t*>(buffer), size);
170}
171
172#ifdef PDF_ENABLE_XFA
173class FPDF_FileHandlerContext : public IFX_SeekableStream {
174 public:
175  template <typename T, typename... Args>
176  friend RetainPtr<T> pdfium::MakeRetain(Args&&... args);
177
178  ~FPDF_FileHandlerContext() override;
179
180  // IFX_SeekableStream:
181  FX_FILESIZE GetSize() override;
182  bool IsEOF() override;
183  FX_FILESIZE GetPosition() override;
184  bool ReadBlock(void* buffer, FX_FILESIZE offset, size_t size) override;
185  size_t ReadBlock(void* buffer, size_t size) override;
186  bool WriteBlock(const void* buffer, FX_FILESIZE offset, size_t size) override;
187  bool Flush() override;
188
189  void SetPosition(FX_FILESIZE pos) { m_nCurPos = pos; }
190
191 protected:
192  explicit FPDF_FileHandlerContext(FPDF_FILEHANDLER* pFS);
193
194  FPDF_FILEHANDLER* m_pFS;
195  FX_FILESIZE m_nCurPos;
196};
197
198FPDF_FileHandlerContext::FPDF_FileHandlerContext(FPDF_FILEHANDLER* pFS) {
199  m_pFS = pFS;
200  m_nCurPos = 0;
201}
202
203FPDF_FileHandlerContext::~FPDF_FileHandlerContext() {
204  if (m_pFS && m_pFS->Release)
205    m_pFS->Release(m_pFS->clientData);
206}
207
208FX_FILESIZE FPDF_FileHandlerContext::GetSize() {
209  if (m_pFS && m_pFS->GetSize)
210    return (FX_FILESIZE)m_pFS->GetSize(m_pFS->clientData);
211  return 0;
212}
213
214bool FPDF_FileHandlerContext::IsEOF() {
215  return m_nCurPos >= GetSize();
216}
217
218FX_FILESIZE FPDF_FileHandlerContext::GetPosition() {
219  return m_nCurPos;
220}
221
222bool FPDF_FileHandlerContext::ReadBlock(void* buffer,
223                                        FX_FILESIZE offset,
224                                        size_t size) {
225  if (!buffer || !size || !m_pFS->ReadBlock)
226    return false;
227
228  if (m_pFS->ReadBlock(m_pFS->clientData, (FPDF_DWORD)offset, buffer,
229                       (FPDF_DWORD)size) == 0) {
230    m_nCurPos = offset + size;
231    return true;
232  }
233  return false;
234}
235
236size_t FPDF_FileHandlerContext::ReadBlock(void* buffer, size_t size) {
237  if (!buffer || !size || !m_pFS->ReadBlock)
238    return 0;
239
240  FX_FILESIZE nSize = GetSize();
241  if (m_nCurPos >= nSize)
242    return 0;
243  FX_FILESIZE dwAvail = nSize - m_nCurPos;
244  if (dwAvail < (FX_FILESIZE)size)
245    size = static_cast<size_t>(dwAvail);
246  if (m_pFS->ReadBlock(m_pFS->clientData, (FPDF_DWORD)m_nCurPos, buffer,
247                       (FPDF_DWORD)size) == 0) {
248    m_nCurPos += size;
249    return size;
250  }
251
252  return 0;
253}
254
255bool FPDF_FileHandlerContext::WriteBlock(const void* buffer,
256                                         FX_FILESIZE offset,
257                                         size_t size) {
258  if (!m_pFS || !m_pFS->WriteBlock)
259    return false;
260
261  if (m_pFS->WriteBlock(m_pFS->clientData, (FPDF_DWORD)offset, buffer,
262                        (FPDF_DWORD)size) == 0) {
263    m_nCurPos = offset + size;
264    return true;
265  }
266  return false;
267}
268
269bool FPDF_FileHandlerContext::Flush() {
270  if (!m_pFS || !m_pFS->Flush)
271    return true;
272
273  return m_pFS->Flush(m_pFS->clientData) == 0;
274}
275#endif  // PDF_ENABLE_XFA
276
277FPDF_DOCUMENT LoadDocumentImpl(
278    const RetainPtr<IFX_SeekableReadStream>& pFileAccess,
279    FPDF_BYTESTRING password) {
280  if (!pFileAccess) {
281    ProcessParseError(CPDF_Parser::FILE_ERROR);
282    return nullptr;
283  }
284
285  auto pParser = pdfium::MakeUnique<CPDF_Parser>();
286  pParser->SetPassword(password);
287
288  auto pDocument = pdfium::MakeUnique<CPDF_Document>(std::move(pParser));
289  CPDF_Parser::Error error =
290      pDocument->GetParser()->StartParse(pFileAccess, pDocument.get());
291  if (error != CPDF_Parser::SUCCESS) {
292    ProcessParseError(error);
293    return nullptr;
294  }
295  CheckUnSupportError(pDocument.get(), error);
296  return FPDFDocumentFromCPDFDocument(pDocument.release());
297}
298
299}  // namespace
300
301UnderlyingDocumentType* UnderlyingFromFPDFDocument(FPDF_DOCUMENT doc) {
302  return static_cast<UnderlyingDocumentType*>(doc);
303}
304
305FPDF_DOCUMENT FPDFDocumentFromUnderlying(UnderlyingDocumentType* doc) {
306  return static_cast<FPDF_DOCUMENT>(doc);
307}
308
309UnderlyingPageType* UnderlyingFromFPDFPage(FPDF_PAGE page) {
310  return static_cast<UnderlyingPageType*>(page);
311}
312
313CPDF_Document* CPDFDocumentFromFPDFDocument(FPDF_DOCUMENT doc) {
314#ifdef PDF_ENABLE_XFA
315  return doc ? UnderlyingFromFPDFDocument(doc)->GetPDFDoc() : nullptr;
316#else   // PDF_ENABLE_XFA
317  return UnderlyingFromFPDFDocument(doc);
318#endif  // PDF_ENABLE_XFA
319}
320
321FPDF_DOCUMENT FPDFDocumentFromCPDFDocument(CPDF_Document* doc) {
322#ifdef PDF_ENABLE_XFA
323  return doc ? FPDFDocumentFromUnderlying(
324                   new CPDFXFA_Context(pdfium::WrapUnique(doc)))
325             : nullptr;
326#else   // PDF_ENABLE_XFA
327  return FPDFDocumentFromUnderlying(doc);
328#endif  // PDF_ENABLE_XFA
329}
330
331CPDF_Page* CPDFPageFromFPDFPage(FPDF_PAGE page) {
332#ifdef PDF_ENABLE_XFA
333  return page ? UnderlyingFromFPDFPage(page)->GetPDFPage() : nullptr;
334#else   // PDF_ENABLE_XFA
335  return UnderlyingFromFPDFPage(page);
336#endif  // PDF_ENABLE_XFA
337}
338
339CPDF_PathObject* CPDFPathObjectFromFPDFPageObject(FPDF_PAGEOBJECT page_object) {
340  auto* obj = CPDFPageObjectFromFPDFPageObject(page_object);
341  return obj ? obj->AsPath() : nullptr;
342}
343
344CPDF_PageObject* CPDFPageObjectFromFPDFPageObject(FPDF_PAGEOBJECT page_object) {
345  return static_cast<CPDF_PageObject*>(page_object);
346}
347
348CPDF_Object* CPDFObjectFromFPDFAttachment(FPDF_ATTACHMENT attachment) {
349  return static_cast<CPDF_Object*>(attachment);
350}
351
352ByteString CFXByteStringFromFPDFWideString(FPDF_WIDESTRING wide_string) {
353  return WideString::FromUTF16LE(wide_string,
354                                 WideString::WStringLength(wide_string))
355      .UTF8Encode();
356}
357
358CFX_DIBitmap* CFXBitmapFromFPDFBitmap(FPDF_BITMAP bitmap) {
359  return static_cast<CFX_DIBitmap*>(bitmap);
360}
361
362CFX_FloatRect CFXFloatRectFromFSRECTF(const FS_RECTF& rect) {
363  return CFX_FloatRect(rect.left, rect.bottom, rect.right, rect.top);
364}
365
366void FSRECTFFromCFXFloatRect(const CFX_FloatRect& rect, FS_RECTF* out_rect) {
367  out_rect->left = rect.left;
368  out_rect->top = rect.top;
369  out_rect->right = rect.right;
370  out_rect->bottom = rect.bottom;
371}
372
373const FX_PATHPOINT* FXPathPointFromFPDFPathSegment(FPDF_PATHSEGMENT segment) {
374  return static_cast<const FX_PATHPOINT*>(segment);
375}
376
377unsigned long Utf16EncodeMaybeCopyAndReturnLength(const WideString& text,
378                                                  void* buffer,
379                                                  unsigned long buflen) {
380  ByteString encoded_text = text.UTF16LE_Encode();
381  unsigned long len = encoded_text.GetLength();
382  if (buffer && len <= buflen)
383    memcpy(buffer, encoded_text.c_str(), len);
384  return len;
385}
386
387unsigned long DecodeStreamMaybeCopyAndReturnLength(const CPDF_Stream* stream,
388                                                   void* buffer,
389                                                   unsigned long buflen) {
390  ASSERT(stream);
391  uint8_t* data = stream->GetRawData();
392  uint32_t len = stream->GetRawSize();
393  CPDF_Dictionary* dict = stream->GetDict();
394  CPDF_Object* decoder = dict ? dict->GetDirectObjectFor("Filter") : nullptr;
395  if (decoder && (decoder->IsArray() || decoder->IsName())) {
396    // Decode the stream if one or more stream filters are specified.
397    uint8_t* decoded_data = nullptr;
398    uint32_t decoded_len = 0;
399    ByteString dummy_last_decoder;
400    CPDF_Dictionary* dummy_last_param;
401    if (PDF_DataDecode(data, len, dict, dict->GetIntegerFor("DL"), false,
402                       &decoded_data, &decoded_len, &dummy_last_decoder,
403                       &dummy_last_param)) {
404      if (buffer && buflen >= decoded_len)
405        memcpy(buffer, decoded_data, decoded_len);
406
407      // Free the buffer for the decoded data if it was allocated by
408      // PDF_DataDecode(). Note that for images with a single image-specific
409      // filter, |decoded_data| is directly assigned to be |data|, so
410      // |decoded_data| does not need to be freed.
411      if (decoded_data != data)
412        FX_Free(decoded_data);
413
414      return decoded_len;
415    }
416  }
417  // Copy the raw data and return its length if there is no valid filter
418  // specified or if decoding failed.
419  if (buffer && buflen >= len)
420    memcpy(buffer, data, len);
421
422  return len;
423}
424
425RetainPtr<IFX_SeekableReadStream> MakeSeekableReadStream(
426    FPDF_FILEACCESS* pFileAccess) {
427  return pdfium::MakeRetain<CPDF_CustomAccess>(pFileAccess);
428}
429
430#ifdef PDF_ENABLE_XFA
431RetainPtr<IFX_SeekableStream> MakeSeekableStream(
432    FPDF_FILEHANDLER* pFilehandler) {
433  return pdfium::MakeRetain<FPDF_FileHandlerContext>(pFilehandler);
434}
435#endif  // PDF_ENABLE_XFA
436
437// 0 bit: FPDF_POLICY_MACHINETIME_ACCESS
438static uint32_t foxit_sandbox_policy = 0xFFFFFFFF;
439
440void FSDK_SetSandBoxPolicy(FPDF_DWORD policy, FPDF_BOOL enable) {
441  switch (policy) {
442    case FPDF_POLICY_MACHINETIME_ACCESS: {
443      if (enable)
444        foxit_sandbox_policy |= 0x01;
445      else
446        foxit_sandbox_policy &= 0xFFFFFFFE;
447    } break;
448    default:
449      break;
450  }
451}
452
453FPDF_BOOL FSDK_IsSandBoxPolicyEnabled(FPDF_DWORD policy) {
454  switch (policy) {
455    case FPDF_POLICY_MACHINETIME_ACCESS:
456      return !!(foxit_sandbox_policy & 0x01);
457    default:
458      return false;
459  }
460}
461
462FPDF_EXPORT void FPDF_CALLCONV FPDF_InitLibrary() {
463  FPDF_InitLibraryWithConfig(nullptr);
464}
465
466FPDF_EXPORT void FPDF_CALLCONV
467FPDF_InitLibraryWithConfig(const FPDF_LIBRARY_CONFIG* cfg) {
468  if (g_bLibraryInitialized)
469    return;
470
471  FXMEM_InitializePartitionAlloc();
472
473  CFX_GEModule* pModule = CFX_GEModule::Get();
474  pModule->Init(cfg ? cfg->m_pUserFontPaths : nullptr);
475
476  CPDF_ModuleMgr* pModuleMgr = CPDF_ModuleMgr::Get();
477  pModuleMgr->Init();
478
479#ifdef PDF_ENABLE_XFA
480  BC_Library_Init();
481#endif  // PDF_ENABLE_XFA
482  if (cfg && cfg->version >= 2)
483    IJS_Runtime::Initialize(cfg->m_v8EmbedderSlot, cfg->m_pIsolate);
484
485  g_bLibraryInitialized = true;
486}
487
488FPDF_EXPORT void FPDF_CALLCONV FPDF_DestroyLibrary() {
489  if (!g_bLibraryInitialized)
490    return;
491
492#ifdef PDF_ENABLE_XFA
493  BC_Library_Destroy();
494#endif  // PDF_ENABLE_XFA
495
496  CPDF_ModuleMgr::Destroy();
497  CFX_GEModule::Destroy();
498
499  IJS_Runtime::Destroy();
500
501  g_bLibraryInitialized = false;
502}
503
504#ifndef _WIN32
505int g_LastError;
506void SetLastError(int err) {
507  g_LastError = err;
508}
509
510int GetLastError() {
511  return g_LastError;
512}
513#endif  // _WIN32
514
515void ProcessParseError(CPDF_Parser::Error err) {
516  uint32_t err_code = FPDF_ERR_SUCCESS;
517  // Translate FPDFAPI error code to FPDFVIEW error code
518  switch (err) {
519    case CPDF_Parser::SUCCESS:
520      err_code = FPDF_ERR_SUCCESS;
521      break;
522    case CPDF_Parser::FILE_ERROR:
523      err_code = FPDF_ERR_FILE;
524      break;
525    case CPDF_Parser::FORMAT_ERROR:
526      err_code = FPDF_ERR_FORMAT;
527      break;
528    case CPDF_Parser::PASSWORD_ERROR:
529      err_code = FPDF_ERR_PASSWORD;
530      break;
531    case CPDF_Parser::HANDLER_ERROR:
532      err_code = FPDF_ERR_SECURITY;
533      break;
534  }
535  SetLastError(err_code);
536}
537
538FPDF_EXPORT void FPDF_CALLCONV FPDF_SetSandBoxPolicy(FPDF_DWORD policy,
539                                                     FPDF_BOOL enable) {
540  return FSDK_SetSandBoxPolicy(policy, enable);
541}
542
543#if defined(_WIN32)
544#if defined(PDFIUM_PRINT_TEXT_WITH_GDI)
545FPDF_EXPORT void FPDF_CALLCONV
546FPDF_SetTypefaceAccessibleFunc(PDFiumEnsureTypefaceCharactersAccessible func) {
547  g_pdfium_typeface_accessible_func = func;
548}
549
550FPDF_EXPORT void FPDF_CALLCONV FPDF_SetPrintTextWithGDI(FPDF_BOOL use_gdi) {
551  g_pdfium_print_text_with_gdi = !!use_gdi;
552}
553#endif  // PDFIUM_PRINT_TEXT_WITH_GDI
554
555FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
556FPDF_SetPrintPostscriptLevel(int postscript_level) {
557  return postscript_level != 1 && FPDF_SetPrintMode(postscript_level);
558}
559
560FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FPDF_SetPrintMode(int mode) {
561  if (mode < FPDF_PRINTMODE_EMF || mode > FPDF_PRINTMODE_POSTSCRIPT3)
562    return FALSE;
563  g_pdfium_print_mode = mode;
564  return TRUE;
565}
566#endif  // defined(_WIN32)
567
568FPDF_EXPORT FPDF_DOCUMENT FPDF_CALLCONV
569FPDF_LoadDocument(FPDF_STRING file_path, FPDF_BYTESTRING password) {
570  // NOTE: the creation of the file needs to be by the embedder on the
571  // other side of this API.
572  return LoadDocumentImpl(IFX_SeekableReadStream::CreateFromFilename(file_path),
573                          password);
574}
575
576FPDF_EXPORT int FPDF_CALLCONV FPDF_GetFormType(FPDF_DOCUMENT document) {
577  if (!document)
578    return false;
579
580  const CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document);
581  if (!pDoc)
582    return FORMTYPE_NONE;
583
584  const CPDF_Dictionary* pRoot = pDoc->GetRoot();
585  if (!pRoot)
586    return FORMTYPE_NONE;
587
588  CPDF_Dictionary* pAcroForm = pRoot->GetDictFor("AcroForm");
589  if (!pAcroForm)
590    return FORMTYPE_NONE;
591
592  CPDF_Object* pXFA = pAcroForm->GetObjectFor("XFA");
593  if (!pXFA)
594    return FORMTYPE_ACRO_FORM;
595
596  bool needsRendering = pRoot->GetBooleanFor("NeedsRendering", false);
597  return needsRendering ? FORMTYPE_XFA_FULL : FORMTYPE_XFA_FOREGROUND;
598}
599
600#ifdef PDF_ENABLE_XFA
601FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FPDF_LoadXFA(FPDF_DOCUMENT document) {
602  return document && static_cast<CPDFXFA_Context*>(document)->LoadXFADoc();
603}
604#endif  // PDF_ENABLE_XFA
605
606class CMemFile final : public IFX_SeekableReadStream {
607 public:
608  static RetainPtr<CMemFile> Create(const uint8_t* pBuf, FX_FILESIZE size) {
609    return RetainPtr<CMemFile>(new CMemFile(pBuf, size));
610  }
611
612  FX_FILESIZE GetSize() override { return m_size; }
613  bool ReadBlock(void* buffer, FX_FILESIZE offset, size_t size) override {
614    if (offset < 0)
615      return false;
616
617    FX_SAFE_FILESIZE newPos = pdfium::base::checked_cast<FX_FILESIZE>(size);
618    newPos += offset;
619    if (!newPos.IsValid() || newPos.ValueOrDie() > m_size)
620      return false;
621
622    memcpy(buffer, m_pBuf + offset, size);
623    return true;
624  }
625
626 private:
627  CMemFile(const uint8_t* pBuf, FX_FILESIZE size)
628      : m_pBuf(pBuf), m_size(size) {}
629
630  const uint8_t* const m_pBuf;
631  const FX_FILESIZE m_size;
632};
633
634FPDF_EXPORT FPDF_DOCUMENT FPDF_CALLCONV
635FPDF_LoadMemDocument(const void* data_buf, int size, FPDF_BYTESTRING password) {
636  return LoadDocumentImpl(
637      CMemFile::Create(static_cast<const uint8_t*>(data_buf), size), password);
638}
639
640FPDF_EXPORT FPDF_DOCUMENT FPDF_CALLCONV
641FPDF_LoadCustomDocument(FPDF_FILEACCESS* pFileAccess,
642                        FPDF_BYTESTRING password) {
643  return LoadDocumentImpl(pdfium::MakeRetain<CPDF_CustomAccess>(pFileAccess),
644                          password);
645}
646
647FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FPDF_GetFileVersion(FPDF_DOCUMENT doc,
648                                                        int* fileVersion) {
649  if (!fileVersion)
650    return false;
651
652  *fileVersion = 0;
653  CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(doc);
654  if (!pDoc)
655    return false;
656
657  const CPDF_Parser* pParser = pDoc->GetParser();
658  if (!pParser)
659    return false;
660
661  *fileVersion = pParser->GetFileVersion();
662  return true;
663}
664
665// jabdelmalek: changed return type from uint32_t to build on Linux (and match
666// header).
667FPDF_EXPORT unsigned long FPDF_CALLCONV
668FPDF_GetDocPermissions(FPDF_DOCUMENT document) {
669  CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document);
670  // https://bugs.chromium.org/p/pdfium/issues/detail?id=499
671  if (!pDoc) {
672#ifndef PDF_ENABLE_XFA
673    return 0;
674#else   // PDF_ENABLE_XFA
675    return 0xFFFFFFFF;
676#endif  // PDF_ENABLE_XFA
677  }
678
679  return pDoc->GetUserPermissions();
680}
681
682FPDF_EXPORT int FPDF_CALLCONV
683FPDF_GetSecurityHandlerRevision(FPDF_DOCUMENT document) {
684  CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document);
685  if (!pDoc || !pDoc->GetParser())
686    return -1;
687
688  CPDF_Dictionary* pDict = pDoc->GetParser()->GetEncryptDict();
689  return pDict ? pDict->GetIntegerFor("R") : -1;
690}
691
692FPDF_EXPORT int FPDF_CALLCONV FPDF_GetPageCount(FPDF_DOCUMENT document) {
693  UnderlyingDocumentType* pDoc = UnderlyingFromFPDFDocument(document);
694  return pDoc ? pDoc->GetPageCount() : 0;
695}
696
697FPDF_EXPORT FPDF_PAGE FPDF_CALLCONV FPDF_LoadPage(FPDF_DOCUMENT document,
698                                                  int page_index) {
699  UnderlyingDocumentType* pDoc = UnderlyingFromFPDFDocument(document);
700  if (!pDoc)
701    return nullptr;
702
703  if (page_index < 0 || page_index >= pDoc->GetPageCount())
704    return nullptr;
705
706#ifdef PDF_ENABLE_XFA
707  return pDoc->GetXFAPage(page_index).Leak();
708#else   // PDF_ENABLE_XFA
709  CPDF_Dictionary* pDict = pDoc->GetPage(page_index);
710  if (!pDict)
711    return nullptr;
712
713  CPDF_Page* pPage = new CPDF_Page(pDoc, pDict, true);
714  pPage->ParseContent();
715  return pPage;
716#endif  // PDF_ENABLE_XFA
717}
718
719FPDF_EXPORT double FPDF_CALLCONV FPDF_GetPageWidth(FPDF_PAGE page) {
720  UnderlyingPageType* pPage = UnderlyingFromFPDFPage(page);
721  return pPage ? pPage->GetPageWidth() : 0.0;
722}
723
724FPDF_EXPORT double FPDF_CALLCONV FPDF_GetPageHeight(FPDF_PAGE page) {
725  UnderlyingPageType* pPage = UnderlyingFromFPDFPage(page);
726  return pPage ? pPage->GetPageHeight() : 0.0;
727}
728
729FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FPDF_GetPageBoundingBox(FPDF_PAGE page,
730                                                            FS_RECTF* rect) {
731  if (!rect)
732    return false;
733
734  CPDF_Page* pPage = CPDFPageFromFPDFPage(page);
735  if (!pPage)
736    return false;
737
738  FSRECTFFromCFXFloatRect(pPage->GetPageBBox(), rect);
739  return true;
740}
741
742#if defined(_WIN32)
743namespace {
744
745const double kEpsilonSize = 0.01f;
746
747void GetScaling(CPDF_Page* pPage,
748                int size_x,
749                int size_y,
750                int rotate,
751                double* scale_x,
752                double* scale_y) {
753  ASSERT(pPage);
754  ASSERT(scale_x);
755  ASSERT(scale_y);
756  double page_width = pPage->GetPageWidth();
757  double page_height = pPage->GetPageHeight();
758  if (page_width < kEpsilonSize || page_height < kEpsilonSize)
759    return;
760
761  if (rotate % 2 == 0) {
762    *scale_x = size_x / page_width;
763    *scale_y = size_y / page_height;
764  } else {
765    *scale_x = size_y / page_width;
766    *scale_y = size_x / page_height;
767  }
768}
769
770FX_RECT GetMaskDimensionsAndOffsets(CPDF_Page* pPage,
771                                    int start_x,
772                                    int start_y,
773                                    int size_x,
774                                    int size_y,
775                                    int rotate,
776                                    const CFX_FloatRect& mask_box) {
777  double scale_x = 0.0f;
778  double scale_y = 0.0f;
779  GetScaling(pPage, size_x, size_y, rotate, &scale_x, &scale_y);
780  if (scale_x < kEpsilonSize || scale_y < kEpsilonSize)
781    return FX_RECT();
782
783  // Compute sizes in page points. Round down to catch the entire bitmap.
784  int start_x_bm = static_cast<int>(mask_box.left * scale_x);
785  int start_y_bm = static_cast<int>(mask_box.bottom * scale_y);
786  int size_x_bm = static_cast<int>(mask_box.right * scale_x + 1.0f) -
787                  static_cast<int>(mask_box.left * scale_x);
788  int size_y_bm = static_cast<int>(mask_box.top * scale_y + 1.0f) -
789                  static_cast<int>(mask_box.bottom * scale_y);
790
791  // Get page rotation
792  int page_rotation = pPage->GetPageRotation();
793
794  // Compute offsets
795  int offset_x = 0;
796  int offset_y = 0;
797  if (size_x > size_y)
798    std::swap(size_x_bm, size_y_bm);
799
800  switch ((rotate + page_rotation) % 4) {
801    case 0:
802      offset_x = start_x_bm + start_x;
803      offset_y = start_y + size_y - size_y_bm - start_y_bm;
804      break;
805    case 1:
806      offset_x = start_y_bm + start_x;
807      offset_y = start_x_bm + start_y;
808      break;
809    case 2:
810      offset_x = start_x + size_x - size_x_bm - start_x_bm;
811      offset_y = start_y_bm + start_y;
812      break;
813    case 3:
814      offset_x = start_x + size_x - size_x_bm - start_y_bm;
815      offset_y = start_y + size_y - size_y_bm - start_x_bm;
816      break;
817  }
818  return FX_RECT(offset_x, offset_y, offset_x + size_x_bm,
819                 offset_y + size_y_bm);
820}
821
822// Get a bitmap of just the mask section defined by |mask_box| from a full page
823// bitmap |pBitmap|.
824RetainPtr<CFX_DIBitmap> GetMaskBitmap(CPDF_Page* pPage,
825                                      int start_x,
826                                      int start_y,
827                                      int size_x,
828                                      int size_y,
829                                      int rotate,
830                                      const RetainPtr<CFX_DIBitmap>& pSrc,
831                                      const CFX_FloatRect& mask_box,
832                                      FX_RECT* bitmap_area) {
833  ASSERT(bitmap_area);
834  *bitmap_area = GetMaskDimensionsAndOffsets(pPage, start_x, start_y, size_x,
835                                             size_y, rotate, mask_box);
836  if (bitmap_area->IsEmpty())
837    return nullptr;
838
839  // Create a new bitmap to transfer part of the page bitmap to.
840  RetainPtr<CFX_DIBitmap> pDst = pdfium::MakeRetain<CFX_DIBitmap>();
841  pDst->Create(bitmap_area->Width(), bitmap_area->Height(), FXDIB_Argb);
842  pDst->Clear(0x00ffffff);
843  pDst->TransferBitmap(0, 0, bitmap_area->Width(), bitmap_area->Height(), pSrc,
844                       bitmap_area->left, bitmap_area->top);
845  return pDst;
846}
847
848void RenderBitmap(CFX_RenderDevice* device,
849                  const RetainPtr<CFX_DIBitmap>& pSrc,
850                  const FX_RECT& mask_area) {
851  int size_x_bm = mask_area.Width();
852  int size_y_bm = mask_area.Height();
853  if (size_x_bm == 0 || size_y_bm == 0)
854    return;
855
856  // Create a new bitmap from the old one
857  RetainPtr<CFX_DIBitmap> pDst = pdfium::MakeRetain<CFX_DIBitmap>();
858  pDst->Create(size_x_bm, size_y_bm, FXDIB_Rgb32);
859  pDst->Clear(0xffffffff);
860  pDst->CompositeBitmap(0, 0, size_x_bm, size_y_bm, pSrc, 0, 0,
861                        FXDIB_BLEND_NORMAL, nullptr, false);
862
863  if (device->GetDeviceCaps(FXDC_DEVICE_CLASS) == FXDC_PRINTER) {
864    device->StretchDIBits(pDst, mask_area.left, mask_area.top, size_x_bm,
865                          size_y_bm);
866  } else {
867    device->SetDIBits(pDst, mask_area.left, mask_area.top);
868  }
869}
870
871}  // namespace
872
873FPDF_EXPORT void FPDF_CALLCONV FPDF_RenderPage(HDC dc,
874                                               FPDF_PAGE page,
875                                               int start_x,
876                                               int start_y,
877                                               int size_x,
878                                               int size_y,
879                                               int rotate,
880                                               int flags) {
881  CPDF_Page* pPage = CPDFPageFromFPDFPage(page);
882  if (!pPage)
883    return;
884  pPage->SetRenderContext(pdfium::MakeUnique<CPDF_PageRenderContext>());
885  CPDF_PageRenderContext* pContext = pPage->GetRenderContext();
886
887  RetainPtr<CFX_DIBitmap> pBitmap;
888  // Don't render the full page to bitmap for a mask unless there are a lot
889  // of masks. Full page bitmaps result in large spool sizes, so they should
890  // only be used when necessary. For large numbers of masks, rendering each
891  // individually is inefficient and unlikely to significantly improve spool
892  // size. TODO (rbpotter): Find out why this still breaks printing for some
893  // PDFs (see crbug.com/777837).
894  const bool bEnableImageMasks = false;
895  const bool bNewBitmap = pPage->BackgroundAlphaNeeded() ||
896                          (pPage->HasImageMask() && !bEnableImageMasks) ||
897                          pPage->GetMaskBoundingBoxes().size() > 100;
898  const bool bHasMask = pPage->HasImageMask() && !bNewBitmap;
899  if (bNewBitmap || bHasMask) {
900    pBitmap = pdfium::MakeRetain<CFX_DIBitmap>();
901    pBitmap->Create(size_x, size_y, FXDIB_Argb);
902    pBitmap->Clear(0x00ffffff);
903    CFX_DefaultRenderDevice* pDevice = new CFX_DefaultRenderDevice;
904    pContext->m_pDevice = pdfium::WrapUnique(pDevice);
905    pDevice->Attach(pBitmap, false, nullptr, false);
906    if (bHasMask) {
907      pContext->m_pOptions = pdfium::MakeUnique<CPDF_RenderOptions>();
908      uint32_t option_flags = pContext->m_pOptions->GetFlags();
909      option_flags |= RENDER_BREAKFORMASKS;
910      pContext->m_pOptions->SetFlags(option_flags);
911    }
912  } else {
913    pContext->m_pDevice = pdfium::MakeUnique<CFX_WindowsRenderDevice>(dc);
914  }
915
916  FPDF_RenderPage_Retail(pContext, page, start_x, start_y, size_x, size_y,
917                         rotate, flags, true, nullptr);
918
919  if (bHasMask) {
920    // Finish rendering the page to bitmap and copy the correct segments
921    // of the page to individual image mask bitmaps.
922    const std::vector<CFX_FloatRect>& mask_boxes =
923        pPage->GetMaskBoundingBoxes();
924    std::vector<FX_RECT> bitmap_areas(mask_boxes.size());
925    std::vector<RetainPtr<CFX_DIBitmap>> bitmaps(mask_boxes.size());
926    for (size_t i = 0; i < mask_boxes.size(); i++) {
927      bitmaps[i] =
928          GetMaskBitmap(pPage, start_x, start_y, size_x, size_y, rotate,
929                        pBitmap, mask_boxes[i], &bitmap_areas[i]);
930      pContext->m_pRenderer->Continue(nullptr);
931    }
932
933    // Reset rendering context
934    pPage->SetRenderContext(nullptr);
935
936    // Begin rendering to the printer. Add flag to indicate the renderer should
937    // pause after each image mask.
938    pPage->SetRenderContext(pdfium::MakeUnique<CPDF_PageRenderContext>());
939    pContext = pPage->GetRenderContext();
940    pContext->m_pDevice = pdfium::MakeUnique<CFX_WindowsRenderDevice>(dc);
941    pContext->m_pOptions = pdfium::MakeUnique<CPDF_RenderOptions>();
942
943    uint32_t option_flags = pContext->m_pOptions->GetFlags();
944    option_flags |= RENDER_BREAKFORMASKS;
945    pContext->m_pOptions->SetFlags(option_flags);
946
947    FPDF_RenderPage_Retail(pContext, page, start_x, start_y, size_x, size_y,
948                           rotate, flags, true, nullptr);
949
950    // Render masks
951    for (size_t i = 0; i < mask_boxes.size(); i++) {
952      // Render the bitmap for the mask and free the bitmap.
953      if (bitmaps[i]) {  // will be null if mask has zero area
954        RenderBitmap(pContext->m_pDevice.get(), bitmaps[i], bitmap_areas[i]);
955      }
956      // Render the next portion of page.
957      pContext->m_pRenderer->Continue(nullptr);
958    }
959  } else if (bNewBitmap) {
960    CFX_WindowsRenderDevice WinDC(dc);
961    if (WinDC.GetDeviceCaps(FXDC_DEVICE_CLASS) == FXDC_PRINTER) {
962      auto pDst = pdfium::MakeRetain<CFX_DIBitmap>();
963      int pitch = pBitmap->GetPitch();
964      pDst->Create(size_x, size_y, FXDIB_Rgb32);
965      memset(pDst->GetBuffer(), -1, pitch * size_y);
966      pDst->CompositeBitmap(0, 0, size_x, size_y, pBitmap, 0, 0,
967                            FXDIB_BLEND_NORMAL, nullptr, false);
968      WinDC.StretchDIBits(pDst, 0, 0, size_x, size_y);
969    } else {
970      WinDC.SetDIBits(pBitmap, 0, 0);
971    }
972  }
973
974  pPage->SetRenderContext(nullptr);
975}
976#endif  // defined(_WIN32)
977
978FPDF_EXPORT void FPDF_CALLCONV FPDF_RenderPageBitmap(FPDF_BITMAP bitmap,
979                                                     FPDF_PAGE page,
980                                                     int start_x,
981                                                     int start_y,
982                                                     int size_x,
983                                                     int size_y,
984                                                     int rotate,
985                                                     int flags) {
986  if (!bitmap)
987    return;
988
989  CPDF_Page* pPage = CPDFPageFromFPDFPage(page);
990  if (!pPage)
991    return;
992
993  CPDF_PageRenderContext* pContext = new CPDF_PageRenderContext;
994  pPage->SetRenderContext(pdfium::WrapUnique(pContext));
995
996  CFX_DefaultRenderDevice* pDevice = new CFX_DefaultRenderDevice;
997  pContext->m_pDevice.reset(pDevice);
998
999  RetainPtr<CFX_DIBitmap> pBitmap(CFXBitmapFromFPDFBitmap(bitmap));
1000  pDevice->Attach(pBitmap, !!(flags & FPDF_REVERSE_BYTE_ORDER), nullptr, false);
1001  FPDF_RenderPage_Retail(pContext, page, start_x, start_y, size_x, size_y,
1002                         rotate, flags, true, nullptr);
1003
1004#ifdef _SKIA_SUPPORT_PATHS_
1005  pDevice->Flush(true);
1006  pBitmap->UnPreMultiply();
1007#endif
1008  pPage->SetRenderContext(nullptr);
1009}
1010
1011FPDF_EXPORT void FPDF_CALLCONV
1012FPDF_RenderPageBitmapWithMatrix(FPDF_BITMAP bitmap,
1013                                FPDF_PAGE page,
1014                                const FS_MATRIX* matrix,
1015                                const FS_RECTF* clipping,
1016                                int flags) {
1017  if (!bitmap)
1018    return;
1019
1020  CPDF_Page* pPage = CPDFPageFromFPDFPage(page);
1021  if (!pPage)
1022    return;
1023
1024  CPDF_PageRenderContext* pContext = new CPDF_PageRenderContext;
1025  pPage->SetRenderContext(pdfium::WrapUnique(pContext));
1026
1027  CFX_DefaultRenderDevice* pDevice = new CFX_DefaultRenderDevice;
1028  pContext->m_pDevice.reset(pDevice);
1029
1030  RetainPtr<CFX_DIBitmap> pBitmap(CFXBitmapFromFPDFBitmap(bitmap));
1031  pDevice->Attach(pBitmap, !!(flags & FPDF_REVERSE_BYTE_ORDER), nullptr, false);
1032
1033  CFX_FloatRect clipping_rect;
1034  if (clipping)
1035    clipping_rect = CFXFloatRectFromFSRECTF(*clipping);
1036  FX_RECT clip_rect = clipping_rect.ToFxRect();
1037
1038  CFX_Matrix transform_matrix = pPage->GetDisplayMatrix(
1039      0, 0, pPage->GetPageWidth(), pPage->GetPageHeight(), 0);
1040
1041  if (matrix) {
1042    transform_matrix.Concat(CFX_Matrix(matrix->a, matrix->b, matrix->c,
1043                                       matrix->d, matrix->e, matrix->f));
1044  }
1045  RenderPageImpl(pContext, pPage, transform_matrix, clip_rect, flags, true,
1046                 nullptr);
1047
1048  pPage->SetRenderContext(nullptr);
1049}
1050
1051#ifdef _SKIA_SUPPORT_
1052FPDF_EXPORT FPDF_RECORDER FPDF_CALLCONV FPDF_RenderPageSkp(FPDF_PAGE page,
1053                                                           int size_x,
1054                                                           int size_y) {
1055  CPDF_Page* pPage = CPDFPageFromFPDFPage(page);
1056  if (!pPage)
1057    return nullptr;
1058
1059  CPDF_PageRenderContext* pContext = new CPDF_PageRenderContext;
1060  pPage->SetRenderContext(pdfium::WrapUnique(pContext));
1061  CFX_DefaultRenderDevice* skDevice = new CFX_DefaultRenderDevice;
1062  FPDF_RECORDER recorder = skDevice->CreateRecorder(size_x, size_y);
1063  pContext->m_pDevice.reset(skDevice);
1064  FPDF_RenderPage_Retail(pContext, page, 0, 0, size_x, size_y, 0, 0, true,
1065                         nullptr);
1066  pPage->SetRenderContext(nullptr);
1067  return recorder;
1068}
1069#endif
1070
1071FPDF_EXPORT void FPDF_CALLCONV FPDF_ClosePage(FPDF_PAGE page) {
1072  UnderlyingPageType* pPage = UnderlyingFromFPDFPage(page);
1073  if (!page)
1074    return;
1075#ifdef PDF_ENABLE_XFA
1076  // Take it back across the API and throw it away.
1077  RetainPtr<CPDFXFA_Page>().Unleak(pPage);
1078#else   // PDF_ENABLE_XFA
1079  CPDFSDK_PageView* pPageView =
1080      static_cast<CPDFSDK_PageView*>(pPage->GetView());
1081  if (pPageView) {
1082    // We're already destroying the pageview, so bail early.
1083    if (pPageView->IsBeingDestroyed())
1084      return;
1085
1086    if (pPageView->IsLocked()) {
1087      pPageView->TakePageOwnership();
1088      return;
1089    }
1090
1091    bool owned = pPageView->OwnsPage();
1092    // This will delete the |pPageView| object. We must cleanup the PageView
1093    // first because it will attempt to reset the View on the |pPage| during
1094    // destruction.
1095    pPageView->GetFormFillEnv()->RemovePageView(pPage);
1096    // If the page was owned then the pageview will have deleted the page.
1097    if (owned)
1098      return;
1099  }
1100  delete pPage;
1101#endif  // PDF_ENABLE_XFA
1102}
1103
1104FPDF_EXPORT void FPDF_CALLCONV FPDF_CloseDocument(FPDF_DOCUMENT document) {
1105  delete UnderlyingFromFPDFDocument(document);
1106}
1107
1108FPDF_EXPORT unsigned long FPDF_CALLCONV FPDF_GetLastError() {
1109  return GetLastError();
1110}
1111
1112FPDF_EXPORT void FPDF_CALLCONV FPDF_DeviceToPage(FPDF_PAGE page,
1113                                                 int start_x,
1114                                                 int start_y,
1115                                                 int size_x,
1116                                                 int size_y,
1117                                                 int rotate,
1118                                                 int device_x,
1119                                                 int device_y,
1120                                                 double* page_x,
1121                                                 double* page_y) {
1122  if (!page || !page_x || !page_y)
1123    return;
1124  UnderlyingPageType* pPage = UnderlyingFromFPDFPage(page);
1125#ifdef PDF_ENABLE_XFA
1126  pPage->DeviceToPage(start_x, start_y, size_x, size_y, rotate, device_x,
1127                      device_y, page_x, page_y);
1128#else   // PDF_ENABLE_XFA
1129  CFX_Matrix page2device =
1130      pPage->GetDisplayMatrix(start_x, start_y, size_x, size_y, rotate);
1131
1132  CFX_PointF pos = page2device.GetInverse().Transform(
1133      CFX_PointF(static_cast<float>(device_x), static_cast<float>(device_y)));
1134
1135  *page_x = pos.x;
1136  *page_y = pos.y;
1137#endif  // PDF_ENABLE_XFA
1138}
1139
1140FPDF_EXPORT void FPDF_CALLCONV FPDF_PageToDevice(FPDF_PAGE page,
1141                                                 int start_x,
1142                                                 int start_y,
1143                                                 int size_x,
1144                                                 int size_y,
1145                                                 int rotate,
1146                                                 double page_x,
1147                                                 double page_y,
1148                                                 int* device_x,
1149                                                 int* device_y) {
1150  if (!device_x || !device_y)
1151    return;
1152  UnderlyingPageType* pPage = UnderlyingFromFPDFPage(page);
1153  if (!pPage)
1154    return;
1155#ifdef PDF_ENABLE_XFA
1156  pPage->PageToDevice(start_x, start_y, size_x, size_y, rotate, page_x, page_y,
1157                      device_x, device_y);
1158#else   // PDF_ENABLE_XFA
1159  CFX_Matrix page2device =
1160      pPage->GetDisplayMatrix(start_x, start_y, size_x, size_y, rotate);
1161  CFX_PointF pos = page2device.Transform(
1162      CFX_PointF(static_cast<float>(page_x), static_cast<float>(page_y)));
1163
1164  *device_x = FXSYS_round(pos.x);
1165  *device_y = FXSYS_round(pos.y);
1166#endif  // PDF_ENABLE_XFA
1167}
1168
1169FPDF_EXPORT FPDF_BITMAP FPDF_CALLCONV FPDFBitmap_Create(int width,
1170                                                        int height,
1171                                                        int alpha) {
1172  auto pBitmap = pdfium::MakeRetain<CFX_DIBitmap>();
1173  if (!pBitmap->Create(width, height, alpha ? FXDIB_Argb : FXDIB_Rgb32))
1174    return nullptr;
1175
1176  return pBitmap.Leak();
1177}
1178
1179FPDF_EXPORT FPDF_BITMAP FPDF_CALLCONV FPDFBitmap_CreateEx(int width,
1180                                                          int height,
1181                                                          int format,
1182                                                          void* first_scan,
1183                                                          int stride) {
1184  FXDIB_Format fx_format;
1185  switch (format) {
1186    case FPDFBitmap_Gray:
1187      fx_format = FXDIB_8bppRgb;
1188      break;
1189    case FPDFBitmap_BGR:
1190      fx_format = FXDIB_Rgb;
1191      break;
1192    case FPDFBitmap_BGRx:
1193      fx_format = FXDIB_Rgb32;
1194      break;
1195    case FPDFBitmap_BGRA:
1196      fx_format = FXDIB_Argb;
1197      break;
1198    default:
1199      return nullptr;
1200  }
1201  auto pBitmap = pdfium::MakeRetain<CFX_DIBitmap>();
1202  pBitmap->Create(width, height, fx_format, static_cast<uint8_t*>(first_scan),
1203                  stride);
1204  return pBitmap.Leak();
1205}
1206
1207FPDF_EXPORT int FPDF_CALLCONV FPDFBitmap_GetFormat(FPDF_BITMAP bitmap) {
1208  if (!bitmap)
1209    return FPDFBitmap_Unknown;
1210
1211  FXDIB_Format format = CFXBitmapFromFPDFBitmap(bitmap)->GetFormat();
1212  switch (format) {
1213    case FXDIB_8bppRgb:
1214    case FXDIB_8bppMask:
1215      return FPDFBitmap_Gray;
1216    case FXDIB_Rgb:
1217      return FPDFBitmap_BGR;
1218    case FXDIB_Rgb32:
1219      return FPDFBitmap_BGRx;
1220    case FXDIB_Argb:
1221      return FPDFBitmap_BGRA;
1222    default:
1223      return FPDFBitmap_Unknown;
1224  }
1225}
1226
1227FPDF_EXPORT void FPDF_CALLCONV FPDFBitmap_FillRect(FPDF_BITMAP bitmap,
1228                                                   int left,
1229                                                   int top,
1230                                                   int width,
1231                                                   int height,
1232                                                   FPDF_DWORD color) {
1233  if (!bitmap)
1234    return;
1235
1236  CFX_DefaultRenderDevice device;
1237  RetainPtr<CFX_DIBitmap> pBitmap(CFXBitmapFromFPDFBitmap(bitmap));
1238  device.Attach(pBitmap, false, nullptr, false);
1239  if (!pBitmap->HasAlpha())
1240    color |= 0xFF000000;
1241  FX_RECT rect(left, top, left + width, top + height);
1242  device.FillRect(&rect, color);
1243}
1244
1245FPDF_EXPORT void* FPDF_CALLCONV FPDFBitmap_GetBuffer(FPDF_BITMAP bitmap) {
1246  return bitmap ? CFXBitmapFromFPDFBitmap(bitmap)->GetBuffer() : nullptr;
1247}
1248
1249FPDF_EXPORT int FPDF_CALLCONV FPDFBitmap_GetWidth(FPDF_BITMAP bitmap) {
1250  return bitmap ? CFXBitmapFromFPDFBitmap(bitmap)->GetWidth() : 0;
1251}
1252
1253FPDF_EXPORT int FPDF_CALLCONV FPDFBitmap_GetHeight(FPDF_BITMAP bitmap) {
1254  return bitmap ? CFXBitmapFromFPDFBitmap(bitmap)->GetHeight() : 0;
1255}
1256
1257FPDF_EXPORT int FPDF_CALLCONV FPDFBitmap_GetStride(FPDF_BITMAP bitmap) {
1258  return bitmap ? CFXBitmapFromFPDFBitmap(bitmap)->GetPitch() : 0;
1259}
1260
1261FPDF_EXPORT void FPDF_CALLCONV FPDFBitmap_Destroy(FPDF_BITMAP bitmap) {
1262  RetainPtr<CFX_DIBitmap> destroyer;
1263  destroyer.Unleak(CFXBitmapFromFPDFBitmap(bitmap));
1264}
1265
1266void FPDF_RenderPage_Retail(CPDF_PageRenderContext* pContext,
1267                            FPDF_PAGE page,
1268                            int start_x,
1269                            int start_y,
1270                            int size_x,
1271                            int size_y,
1272                            int rotate,
1273                            int flags,
1274                            bool bNeedToRestore,
1275                            IFSDK_PAUSE_Adapter* pause) {
1276  CPDF_Page* pPage = CPDFPageFromFPDFPage(page);
1277  if (!pPage)
1278    return;
1279
1280  RenderPageImpl(pContext, pPage, pPage->GetDisplayMatrix(
1281                                      start_x, start_y, size_x, size_y, rotate),
1282                 FX_RECT(start_x, start_y, start_x + size_x, start_y + size_y),
1283                 flags, bNeedToRestore, pause);
1284}
1285
1286FPDF_EXPORT int FPDF_CALLCONV FPDF_GetPageSizeByIndex(FPDF_DOCUMENT document,
1287                                                      int page_index,
1288                                                      double* width,
1289                                                      double* height) {
1290  UnderlyingDocumentType* pDoc = UnderlyingFromFPDFDocument(document);
1291  if (!pDoc)
1292    return false;
1293
1294#ifdef PDF_ENABLE_XFA
1295  int count = pDoc->GetPageCount();
1296  if (page_index < 0 || page_index >= count)
1297    return false;
1298  RetainPtr<CPDFXFA_Page> pPage = pDoc->GetXFAPage(page_index);
1299  if (!pPage)
1300    return false;
1301  *width = pPage->GetPageWidth();
1302  *height = pPage->GetPageHeight();
1303#else   // PDF_ENABLE_XFA
1304  CPDF_Dictionary* pDict = pDoc->GetPage(page_index);
1305  if (!pDict)
1306    return false;
1307
1308  CPDF_Page page(pDoc, pDict, true);
1309  *width = page.GetPageWidth();
1310  *height = page.GetPageHeight();
1311#endif  // PDF_ENABLE_XFA
1312
1313  return true;
1314}
1315
1316FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
1317FPDF_VIEWERREF_GetPrintScaling(FPDF_DOCUMENT document) {
1318  CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document);
1319  if (!pDoc)
1320    return true;
1321  CPDF_ViewerPreferences viewRef(pDoc);
1322  return viewRef.PrintScaling();
1323}
1324
1325FPDF_EXPORT int FPDF_CALLCONV
1326FPDF_VIEWERREF_GetNumCopies(FPDF_DOCUMENT document) {
1327  CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document);
1328  if (!pDoc)
1329    return 1;
1330  CPDF_ViewerPreferences viewRef(pDoc);
1331  return viewRef.NumCopies();
1332}
1333
1334FPDF_EXPORT FPDF_PAGERANGE FPDF_CALLCONV
1335FPDF_VIEWERREF_GetPrintPageRange(FPDF_DOCUMENT document) {
1336  CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document);
1337  if (!pDoc)
1338    return nullptr;
1339  CPDF_ViewerPreferences viewRef(pDoc);
1340  return viewRef.PrintPageRange();
1341}
1342
1343FPDF_EXPORT FPDF_DUPLEXTYPE FPDF_CALLCONV
1344FPDF_VIEWERREF_GetDuplex(FPDF_DOCUMENT document) {
1345  CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document);
1346  if (!pDoc)
1347    return DuplexUndefined;
1348  CPDF_ViewerPreferences viewRef(pDoc);
1349  ByteString duplex = viewRef.Duplex();
1350  if ("Simplex" == duplex)
1351    return Simplex;
1352  if ("DuplexFlipShortEdge" == duplex)
1353    return DuplexFlipShortEdge;
1354  if ("DuplexFlipLongEdge" == duplex)
1355    return DuplexFlipLongEdge;
1356  return DuplexUndefined;
1357}
1358
1359FPDF_EXPORT unsigned long FPDF_CALLCONV
1360FPDF_VIEWERREF_GetName(FPDF_DOCUMENT document,
1361                       FPDF_BYTESTRING key,
1362                       char* buffer,
1363                       unsigned long length) {
1364  CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document);
1365  if (!pDoc)
1366    return 0;
1367
1368  CPDF_ViewerPreferences viewRef(pDoc);
1369  ByteString bsVal;
1370  if (!viewRef.GenericName(key, &bsVal))
1371    return 0;
1372
1373  unsigned long dwStringLen = bsVal.GetLength() + 1;
1374  if (buffer && length >= dwStringLen)
1375    memcpy(buffer, bsVal.c_str(), dwStringLen);
1376  return dwStringLen;
1377}
1378
1379FPDF_EXPORT FPDF_DWORD FPDF_CALLCONV
1380FPDF_CountNamedDests(FPDF_DOCUMENT document) {
1381  CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document);
1382  if (!pDoc)
1383    return 0;
1384
1385  const CPDF_Dictionary* pRoot = pDoc->GetRoot();
1386  if (!pRoot)
1387    return 0;
1388
1389  CPDF_NameTree nameTree(pDoc, "Dests");
1390  pdfium::base::CheckedNumeric<FPDF_DWORD> count = nameTree.GetCount();
1391  CPDF_Dictionary* pDest = pRoot->GetDictFor("Dests");
1392  if (pDest)
1393    count += pDest->GetCount();
1394
1395  if (!count.IsValid())
1396    return 0;
1397
1398  return count.ValueOrDie();
1399}
1400
1401FPDF_EXPORT FPDF_DEST FPDF_CALLCONV
1402FPDF_GetNamedDestByName(FPDF_DOCUMENT document, FPDF_BYTESTRING name) {
1403  if (!name || name[0] == 0)
1404    return nullptr;
1405
1406  CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document);
1407  if (!pDoc)
1408    return nullptr;
1409
1410  CPDF_NameTree name_tree(pDoc, "Dests");
1411  return name_tree.LookupNamedDest(pDoc, PDF_DecodeText(ByteString(name)));
1412}
1413
1414#ifdef PDF_ENABLE_XFA
1415FPDF_EXPORT FPDF_RESULT FPDF_CALLCONV FPDF_BStr_Init(FPDF_BSTR* str) {
1416  if (!str)
1417    return -1;
1418
1419  memset(str, 0, sizeof(FPDF_BSTR));
1420  return 0;
1421}
1422
1423FPDF_EXPORT FPDF_RESULT FPDF_CALLCONV FPDF_BStr_Set(FPDF_BSTR* str,
1424                                                    FPDF_LPCSTR bstr,
1425                                                    int length) {
1426  if (!str || !bstr || !length)
1427    return -1;
1428
1429  if (length == -1)
1430    length = strlen(bstr);
1431
1432  if (length == 0) {
1433    FPDF_BStr_Clear(str);
1434    return 0;
1435  }
1436
1437  if (str->str && str->len < length)
1438    str->str = FX_Realloc(char, str->str, length + 1);
1439  else if (!str->str)
1440    str->str = FX_Alloc(char, length + 1);
1441
1442  str->str[length] = 0;
1443  memcpy(str->str, bstr, length);
1444  str->len = length;
1445
1446  return 0;
1447}
1448
1449FPDF_EXPORT FPDF_RESULT FPDF_CALLCONV FPDF_BStr_Clear(FPDF_BSTR* str) {
1450  if (!str)
1451    return -1;
1452
1453  if (str->str) {
1454    FX_Free(str->str);
1455    str->str = nullptr;
1456  }
1457  str->len = 0;
1458  return 0;
1459}
1460#endif  // PDF_ENABLE_XFA
1461
1462FPDF_EXPORT FPDF_DEST FPDF_CALLCONV FPDF_GetNamedDest(FPDF_DOCUMENT document,
1463                                                      int index,
1464                                                      void* buffer,
1465                                                      long* buflen) {
1466  if (!buffer)
1467    *buflen = 0;
1468
1469  if (index < 0)
1470    return nullptr;
1471
1472  CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document);
1473  if (!pDoc)
1474    return nullptr;
1475
1476  const CPDF_Dictionary* pRoot = pDoc->GetRoot();
1477  if (!pRoot)
1478    return nullptr;
1479
1480  CPDF_Object* pDestObj = nullptr;
1481  WideString wsName;
1482  CPDF_NameTree nameTree(pDoc, "Dests");
1483  int count = nameTree.GetCount();
1484  if (index >= count) {
1485    CPDF_Dictionary* pDest = pRoot->GetDictFor("Dests");
1486    if (!pDest)
1487      return nullptr;
1488
1489    pdfium::base::CheckedNumeric<int> checked_count = count;
1490    checked_count += pDest->GetCount();
1491    if (!checked_count.IsValid() || index >= checked_count.ValueOrDie())
1492      return nullptr;
1493
1494    index -= count;
1495    int i = 0;
1496    ByteString bsName;
1497    for (const auto& it : *pDest) {
1498      bsName = it.first;
1499      pDestObj = it.second.get();
1500      if (!pDestObj)
1501        continue;
1502      if (i == index)
1503        break;
1504      i++;
1505    }
1506    wsName = PDF_DecodeText(bsName);
1507  } else {
1508    pDestObj = nameTree.LookupValueAndName(index, &wsName);
1509  }
1510  if (!pDestObj)
1511    return nullptr;
1512  if (CPDF_Dictionary* pDict = pDestObj->AsDictionary()) {
1513    pDestObj = pDict->GetArrayFor("D");
1514    if (!pDestObj)
1515      return nullptr;
1516  }
1517  if (!pDestObj->IsArray())
1518    return nullptr;
1519
1520  ByteString utf16Name = wsName.UTF16LE_Encode();
1521  int len = utf16Name.GetLength();
1522  if (!buffer) {
1523    *buflen = len;
1524  } else if (len <= *buflen) {
1525    memcpy(buffer, utf16Name.c_str(), len);
1526    *buflen = len;
1527  } else {
1528    *buflen = -1;
1529  }
1530  return (FPDF_DEST)pDestObj;
1531}
1532