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.
59 static_assert(WindowsPrintMode::kModeEmf == FPDF_PRINTMODE_EMF,
60 "WindowsPrintMode::kModeEmf value mismatch");
61 static_assert(WindowsPrintMode::kModeTextOnly == FPDF_PRINTMODE_TEXTONLY,
62 "WindowsPrintMode::kModeTextOnly value mismatch");
63 static_assert(WindowsPrintMode::kModePostScript2 == FPDF_PRINTMODE_POSTSCRIPT2,
64 "WindowsPrintMode::kModePostScript2 value mismatch");
65 static_assert(WindowsPrintMode::kModePostScript3 == FPDF_PRINTMODE_POSTSCRIPT3,
66 "WindowsPrintMode::kModePostScript3 value mismatch");
67 #endif
68
69 namespace {
70
71 bool g_bLibraryInitialized = false;
72
RenderPageImpl(CPDF_PageRenderContext * pContext,CPDF_Page * pPage,const CFX_Matrix & matrix,const FX_RECT & clipping_rect,int flags,bool bNeedToRestore,IFSDK_PAUSE_Adapter * pause)73 void 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
134 class 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
CPDF_CustomAccess(FPDF_FILEACCESS * pFileAccess)149 CPDF_CustomAccess::CPDF_CustomAccess(FPDF_FILEACCESS* pFileAccess)
150 : m_FileAccess(*pFileAccess) {}
151
GetSize()152 FX_FILESIZE CPDF_CustomAccess::GetSize() {
153 return m_FileAccess.m_FileLen;
154 }
155
ReadBlock(void * buffer,FX_FILESIZE offset,size_t size)156 bool 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
173 class 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
SetPosition(FX_FILESIZE pos)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
FPDF_FileHandlerContext(FPDF_FILEHANDLER * pFS)198 FPDF_FileHandlerContext::FPDF_FileHandlerContext(FPDF_FILEHANDLER* pFS) {
199 m_pFS = pFS;
200 m_nCurPos = 0;
201 }
202
~FPDF_FileHandlerContext()203 FPDF_FileHandlerContext::~FPDF_FileHandlerContext() {
204 if (m_pFS && m_pFS->Release)
205 m_pFS->Release(m_pFS->clientData);
206 }
207
GetSize()208 FX_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
IsEOF()214 bool FPDF_FileHandlerContext::IsEOF() {
215 return m_nCurPos >= GetSize();
216 }
217
GetPosition()218 FX_FILESIZE FPDF_FileHandlerContext::GetPosition() {
219 return m_nCurPos;
220 }
221
ReadBlock(void * buffer,FX_FILESIZE offset,size_t size)222 bool 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
ReadBlock(void * buffer,size_t size)236 size_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
WriteBlock(const void * buffer,FX_FILESIZE offset,size_t size)255 bool 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
Flush()269 bool 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
LoadDocumentImpl(const RetainPtr<IFX_SeekableReadStream> & pFileAccess,FPDF_BYTESTRING password)277 FPDF_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
UnderlyingFromFPDFDocument(FPDF_DOCUMENT doc)301 UnderlyingDocumentType* UnderlyingFromFPDFDocument(FPDF_DOCUMENT doc) {
302 return static_cast<UnderlyingDocumentType*>(doc);
303 }
304
FPDFDocumentFromUnderlying(UnderlyingDocumentType * doc)305 FPDF_DOCUMENT FPDFDocumentFromUnderlying(UnderlyingDocumentType* doc) {
306 return static_cast<FPDF_DOCUMENT>(doc);
307 }
308
UnderlyingFromFPDFPage(FPDF_PAGE page)309 UnderlyingPageType* UnderlyingFromFPDFPage(FPDF_PAGE page) {
310 return static_cast<UnderlyingPageType*>(page);
311 }
312
CPDFDocumentFromFPDFDocument(FPDF_DOCUMENT doc)313 CPDF_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
FPDFDocumentFromCPDFDocument(CPDF_Document * doc)321 FPDF_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
CPDFPageFromFPDFPage(FPDF_PAGE page)331 CPDF_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
CPDFPathObjectFromFPDFPageObject(FPDF_PAGEOBJECT page_object)339 CPDF_PathObject* CPDFPathObjectFromFPDFPageObject(FPDF_PAGEOBJECT page_object) {
340 auto* obj = CPDFPageObjectFromFPDFPageObject(page_object);
341 return obj ? obj->AsPath() : nullptr;
342 }
343
CPDFPageObjectFromFPDFPageObject(FPDF_PAGEOBJECT page_object)344 CPDF_PageObject* CPDFPageObjectFromFPDFPageObject(FPDF_PAGEOBJECT page_object) {
345 return static_cast<CPDF_PageObject*>(page_object);
346 }
347
CPDFObjectFromFPDFAttachment(FPDF_ATTACHMENT attachment)348 CPDF_Object* CPDFObjectFromFPDFAttachment(FPDF_ATTACHMENT attachment) {
349 return static_cast<CPDF_Object*>(attachment);
350 }
351
CFXByteStringFromFPDFWideString(FPDF_WIDESTRING wide_string)352 ByteString CFXByteStringFromFPDFWideString(FPDF_WIDESTRING wide_string) {
353 return WideString::FromUTF16LE(wide_string,
354 WideString::WStringLength(wide_string))
355 .UTF8Encode();
356 }
357
CFXBitmapFromFPDFBitmap(FPDF_BITMAP bitmap)358 CFX_DIBitmap* CFXBitmapFromFPDFBitmap(FPDF_BITMAP bitmap) {
359 return static_cast<CFX_DIBitmap*>(bitmap);
360 }
361
CFXFloatRectFromFSRECTF(const FS_RECTF & rect)362 CFX_FloatRect CFXFloatRectFromFSRECTF(const FS_RECTF& rect) {
363 return CFX_FloatRect(rect.left, rect.bottom, rect.right, rect.top);
364 }
365
FSRECTFFromCFXFloatRect(const CFX_FloatRect & rect,FS_RECTF * out_rect)366 void 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
FXPathPointFromFPDFPathSegment(FPDF_PATHSEGMENT segment)373 const FX_PATHPOINT* FXPathPointFromFPDFPathSegment(FPDF_PATHSEGMENT segment) {
374 return static_cast<const FX_PATHPOINT*>(segment);
375 }
376
Utf16EncodeMaybeCopyAndReturnLength(const WideString & text,void * buffer,unsigned long buflen)377 unsigned 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
DecodeStreamMaybeCopyAndReturnLength(const CPDF_Stream * stream,void * buffer,unsigned long buflen)387 unsigned 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
MakeSeekableReadStream(FPDF_FILEACCESS * pFileAccess)425 RetainPtr<IFX_SeekableReadStream> MakeSeekableReadStream(
426 FPDF_FILEACCESS* pFileAccess) {
427 return pdfium::MakeRetain<CPDF_CustomAccess>(pFileAccess);
428 }
429
430 #ifdef PDF_ENABLE_XFA
MakeSeekableStream(FPDF_FILEHANDLER * pFilehandler)431 RetainPtr<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
438 static uint32_t foxit_sandbox_policy = 0xFFFFFFFF;
439
FSDK_SetSandBoxPolicy(FPDF_DWORD policy,FPDF_BOOL enable)440 void 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
FSDK_IsSandBoxPolicyEnabled(FPDF_DWORD policy)453 FPDF_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
FPDF_InitLibrary()462 FPDF_EXPORT void FPDF_CALLCONV FPDF_InitLibrary() {
463 FPDF_InitLibraryWithConfig(nullptr);
464 }
465
466 FPDF_EXPORT void FPDF_CALLCONV
FPDF_InitLibraryWithConfig(const FPDF_LIBRARY_CONFIG * cfg)467 FPDF_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
FPDF_DestroyLibrary()488 FPDF_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
505 int g_LastError;
SetLastError(int err)506 void SetLastError(int err) {
507 g_LastError = err;
508 }
509
GetLastError()510 int GetLastError() {
511 return g_LastError;
512 }
513 #endif // _WIN32
514
ProcessParseError(CPDF_Parser::Error err)515 void 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
FPDF_SetSandBoxPolicy(FPDF_DWORD policy,FPDF_BOOL enable)538 FPDF_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)
545 FPDF_EXPORT void FPDF_CALLCONV
FPDF_SetTypefaceAccessibleFunc(PDFiumEnsureTypefaceCharactersAccessible func)546 FPDF_SetTypefaceAccessibleFunc(PDFiumEnsureTypefaceCharactersAccessible func) {
547 g_pdfium_typeface_accessible_func = func;
548 }
549
FPDF_SetPrintTextWithGDI(FPDF_BOOL use_gdi)550 FPDF_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
555 FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
FPDF_SetPrintPostscriptLevel(int postscript_level)556 FPDF_SetPrintPostscriptLevel(int postscript_level) {
557 return postscript_level != 1 && FPDF_SetPrintMode(postscript_level);
558 }
559
FPDF_SetPrintMode(int mode)560 FPDF_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
568 FPDF_EXPORT FPDF_DOCUMENT FPDF_CALLCONV
FPDF_LoadDocument(FPDF_STRING file_path,FPDF_BYTESTRING password)569 FPDF_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
FPDF_GetFormType(FPDF_DOCUMENT document)576 FPDF_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
FPDF_LoadXFA(FPDF_DOCUMENT document)601 FPDF_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
606 class CMemFile final : public IFX_SeekableReadStream {
607 public:
Create(const uint8_t * pBuf,FX_FILESIZE size)608 static RetainPtr<CMemFile> Create(const uint8_t* pBuf, FX_FILESIZE size) {
609 return RetainPtr<CMemFile>(new CMemFile(pBuf, size));
610 }
611
GetSize()612 FX_FILESIZE GetSize() override { return m_size; }
ReadBlock(void * buffer,FX_FILESIZE offset,size_t 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:
CMemFile(const uint8_t * pBuf,FX_FILESIZE size)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
634 FPDF_EXPORT FPDF_DOCUMENT FPDF_CALLCONV
FPDF_LoadMemDocument(const void * data_buf,int size,FPDF_BYTESTRING password)635 FPDF_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
640 FPDF_EXPORT FPDF_DOCUMENT FPDF_CALLCONV
FPDF_LoadCustomDocument(FPDF_FILEACCESS * pFileAccess,FPDF_BYTESTRING password)641 FPDF_LoadCustomDocument(FPDF_FILEACCESS* pFileAccess,
642 FPDF_BYTESTRING password) {
643 return LoadDocumentImpl(pdfium::MakeRetain<CPDF_CustomAccess>(pFileAccess),
644 password);
645 }
646
FPDF_GetFileVersion(FPDF_DOCUMENT doc,int * fileVersion)647 FPDF_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).
667 FPDF_EXPORT unsigned long FPDF_CALLCONV
FPDF_GetDocPermissions(FPDF_DOCUMENT document)668 FPDF_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
682 FPDF_EXPORT int FPDF_CALLCONV
FPDF_GetSecurityHandlerRevision(FPDF_DOCUMENT document)683 FPDF_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
FPDF_GetPageCount(FPDF_DOCUMENT document)692 FPDF_EXPORT int FPDF_CALLCONV FPDF_GetPageCount(FPDF_DOCUMENT document) {
693 UnderlyingDocumentType* pDoc = UnderlyingFromFPDFDocument(document);
694 return pDoc ? pDoc->GetPageCount() : 0;
695 }
696
FPDF_LoadPage(FPDF_DOCUMENT document,int page_index)697 FPDF_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
FPDF_GetPageWidth(FPDF_PAGE page)719 FPDF_EXPORT double FPDF_CALLCONV FPDF_GetPageWidth(FPDF_PAGE page) {
720 UnderlyingPageType* pPage = UnderlyingFromFPDFPage(page);
721 return pPage ? pPage->GetPageWidth() : 0.0;
722 }
723
FPDF_GetPageHeight(FPDF_PAGE page)724 FPDF_EXPORT double FPDF_CALLCONV FPDF_GetPageHeight(FPDF_PAGE page) {
725 UnderlyingPageType* pPage = UnderlyingFromFPDFPage(page);
726 return pPage ? pPage->GetPageHeight() : 0.0;
727 }
728
FPDF_GetPageBoundingBox(FPDF_PAGE page,FS_RECTF * rect)729 FPDF_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)
743 namespace {
744
745 const double kEpsilonSize = 0.01f;
746
GetScaling(CPDF_Page * pPage,int size_x,int size_y,int rotate,double * scale_x,double * scale_y)747 void 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
GetMaskDimensionsAndOffsets(CPDF_Page * pPage,int start_x,int start_y,int size_x,int size_y,int rotate,const CFX_FloatRect & mask_box)770 FX_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|.
GetMaskBitmap(CPDF_Page * pPage,int start_x,int start_y,int size_x,int size_y,int rotate,const RetainPtr<CFX_DIBitmap> & pSrc,const CFX_FloatRect & mask_box,FX_RECT * bitmap_area)824 RetainPtr<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
RenderBitmap(CFX_RenderDevice * device,const RetainPtr<CFX_DIBitmap> & pSrc,const FX_RECT & mask_area)848 void 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
FPDF_RenderPage(HDC dc,FPDF_PAGE page,int start_x,int start_y,int size_x,int size_y,int rotate,int flags)873 FPDF_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
FPDF_RenderPageBitmap(FPDF_BITMAP bitmap,FPDF_PAGE page,int start_x,int start_y,int size_x,int size_y,int rotate,int flags)978 FPDF_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
1011 FPDF_EXPORT void FPDF_CALLCONV
FPDF_RenderPageBitmapWithMatrix(FPDF_BITMAP bitmap,FPDF_PAGE page,const FS_MATRIX * matrix,const FS_RECTF * clipping,int flags)1012 FPDF_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_
FPDF_RenderPageSkp(FPDF_PAGE page,int size_x,int size_y)1052 FPDF_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
FPDF_ClosePage(FPDF_PAGE page)1071 FPDF_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
FPDF_CloseDocument(FPDF_DOCUMENT document)1104 FPDF_EXPORT void FPDF_CALLCONV FPDF_CloseDocument(FPDF_DOCUMENT document) {
1105 delete UnderlyingFromFPDFDocument(document);
1106 }
1107
FPDF_GetLastError()1108 FPDF_EXPORT unsigned long FPDF_CALLCONV FPDF_GetLastError() {
1109 return GetLastError();
1110 }
1111
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)1112 FPDF_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
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)1140 FPDF_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
FPDFBitmap_Create(int width,int height,int alpha)1169 FPDF_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
FPDFBitmap_CreateEx(int width,int height,int format,void * first_scan,int stride)1179 FPDF_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
FPDFBitmap_GetFormat(FPDF_BITMAP bitmap)1207 FPDF_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
FPDFBitmap_FillRect(FPDF_BITMAP bitmap,int left,int top,int width,int height,FPDF_DWORD color)1227 FPDF_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
FPDFBitmap_GetBuffer(FPDF_BITMAP bitmap)1245 FPDF_EXPORT void* FPDF_CALLCONV FPDFBitmap_GetBuffer(FPDF_BITMAP bitmap) {
1246 return bitmap ? CFXBitmapFromFPDFBitmap(bitmap)->GetBuffer() : nullptr;
1247 }
1248
FPDFBitmap_GetWidth(FPDF_BITMAP bitmap)1249 FPDF_EXPORT int FPDF_CALLCONV FPDFBitmap_GetWidth(FPDF_BITMAP bitmap) {
1250 return bitmap ? CFXBitmapFromFPDFBitmap(bitmap)->GetWidth() : 0;
1251 }
1252
FPDFBitmap_GetHeight(FPDF_BITMAP bitmap)1253 FPDF_EXPORT int FPDF_CALLCONV FPDFBitmap_GetHeight(FPDF_BITMAP bitmap) {
1254 return bitmap ? CFXBitmapFromFPDFBitmap(bitmap)->GetHeight() : 0;
1255 }
1256
FPDFBitmap_GetStride(FPDF_BITMAP bitmap)1257 FPDF_EXPORT int FPDF_CALLCONV FPDFBitmap_GetStride(FPDF_BITMAP bitmap) {
1258 return bitmap ? CFXBitmapFromFPDFBitmap(bitmap)->GetPitch() : 0;
1259 }
1260
FPDFBitmap_Destroy(FPDF_BITMAP bitmap)1261 FPDF_EXPORT void FPDF_CALLCONV FPDFBitmap_Destroy(FPDF_BITMAP bitmap) {
1262 RetainPtr<CFX_DIBitmap> destroyer;
1263 destroyer.Unleak(CFXBitmapFromFPDFBitmap(bitmap));
1264 }
1265
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)1266 void 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
FPDF_GetPageSizeByIndex(FPDF_DOCUMENT document,int page_index,double * width,double * height)1286 FPDF_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
1316 FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
FPDF_VIEWERREF_GetPrintScaling(FPDF_DOCUMENT document)1317 FPDF_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
1325 FPDF_EXPORT int FPDF_CALLCONV
FPDF_VIEWERREF_GetNumCopies(FPDF_DOCUMENT document)1326 FPDF_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
1334 FPDF_EXPORT FPDF_PAGERANGE FPDF_CALLCONV
FPDF_VIEWERREF_GetPrintPageRange(FPDF_DOCUMENT document)1335 FPDF_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
1343 FPDF_EXPORT FPDF_DUPLEXTYPE FPDF_CALLCONV
FPDF_VIEWERREF_GetDuplex(FPDF_DOCUMENT document)1344 FPDF_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
1359 FPDF_EXPORT unsigned long FPDF_CALLCONV
FPDF_VIEWERREF_GetName(FPDF_DOCUMENT document,FPDF_BYTESTRING key,char * buffer,unsigned long length)1360 FPDF_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
1379 FPDF_EXPORT FPDF_DWORD FPDF_CALLCONV
FPDF_CountNamedDests(FPDF_DOCUMENT document)1380 FPDF_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
1401 FPDF_EXPORT FPDF_DEST FPDF_CALLCONV
FPDF_GetNamedDestByName(FPDF_DOCUMENT document,FPDF_BYTESTRING name)1402 FPDF_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
FPDF_BStr_Init(FPDF_BSTR * str)1415 FPDF_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
FPDF_BStr_Set(FPDF_BSTR * str,FPDF_LPCSTR bstr,int length)1423 FPDF_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
FPDF_BStr_Clear(FPDF_BSTR * str)1449 FPDF_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
FPDF_GetNamedDest(FPDF_DOCUMENT document,int index,void * buffer,long * buflen)1462 FPDF_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