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1 // Copyright 2014 The PDFium Authors
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/fpdf_edit.h"
8 
9 #include <algorithm>
10 #include <memory>
11 #include <utility>
12 #include <vector>
13 
14 #include "constants/page_object.h"
15 #include "core/fpdfapi/edit/cpdf_pagecontentgenerator.h"
16 #include "core/fpdfapi/page/cpdf_colorspace.h"
17 #include "core/fpdfapi/page/cpdf_docpagedata.h"
18 #include "core/fpdfapi/page/cpdf_form.h"
19 #include "core/fpdfapi/page/cpdf_formobject.h"
20 #include "core/fpdfapi/page/cpdf_imageobject.h"
21 #include "core/fpdfapi/page/cpdf_page.h"
22 #include "core/fpdfapi/page/cpdf_pageimagecache.h"
23 #include "core/fpdfapi/page/cpdf_pageobject.h"
24 #include "core/fpdfapi/page/cpdf_pathobject.h"
25 #include "core/fpdfapi/page/cpdf_shadingobject.h"
26 #include "core/fpdfapi/page/cpdf_textobject.h"
27 #include "core/fpdfapi/parser/cpdf_array.h"
28 #include "core/fpdfapi/parser/cpdf_dictionary.h"
29 #include "core/fpdfapi/parser/cpdf_document.h"
30 #include "core/fpdfapi/parser/cpdf_name.h"
31 #include "core/fpdfapi/parser/cpdf_number.h"
32 #include "core/fpdfapi/parser/cpdf_string.h"
33 #include "core/fpdfapi/render/cpdf_docrenderdata.h"
34 #include "core/fpdfdoc/cpdf_annot.h"
35 #include "core/fpdfdoc/cpdf_annotlist.h"
36 #include "core/fxcrt/compiler_specific.h"
37 #include "core/fxcrt/fx_extension.h"
38 #include "core/fxcrt/fx_memcpy_wrappers.h"
39 #include "core/fxcrt/numerics/safe_conversions.h"
40 #include "core/fxcrt/span.h"
41 #include "core/fxcrt/span_util.h"
42 #include "core/fxcrt/stl_util.h"
43 #include "fpdfsdk/cpdfsdk_helpers.h"
44 #include "public/fpdf_formfill.h"
45 
46 #ifdef PDF_ENABLE_XFA
47 #include "fpdfsdk/fpdfxfa/cpdfxfa_context.h"
48 #include "fpdfsdk/fpdfxfa/cpdfxfa_page.h"
49 #endif  // PDF_ENABLE_XFA
50 
51 namespace {
52 
53 static_assert(FPDF_PAGEOBJ_TEXT ==
54                   static_cast<int>(CPDF_PageObject::Type::kText),
55               "FPDF_PAGEOBJ_TEXT/CPDF_PageObject::TEXT mismatch");
56 static_assert(FPDF_PAGEOBJ_PATH ==
57                   static_cast<int>(CPDF_PageObject::Type::kPath),
58               "FPDF_PAGEOBJ_PATH/CPDF_PageObject::PATH mismatch");
59 static_assert(FPDF_PAGEOBJ_IMAGE ==
60                   static_cast<int>(CPDF_PageObject::Type::kImage),
61               "FPDF_PAGEOBJ_IMAGE/CPDF_PageObject::IMAGE mismatch");
62 static_assert(FPDF_PAGEOBJ_SHADING ==
63                   static_cast<int>(CPDF_PageObject::Type::kShading),
64               "FPDF_PAGEOBJ_SHADING/CPDF_PageObject::SHADING mismatch");
65 static_assert(FPDF_PAGEOBJ_FORM ==
66                   static_cast<int>(CPDF_PageObject::Type::kForm),
67               "FPDF_PAGEOBJ_FORM/CPDF_PageObject::FORM mismatch");
68 
IsPageObject(CPDF_Page * pPage)69 bool IsPageObject(CPDF_Page* pPage) {
70   if (!pPage)
71     return false;
72 
73   RetainPtr<const CPDF_Dictionary> pFormDict = pPage->GetDict();
74   if (!pFormDict->KeyExist(pdfium::page_object::kType))
75     return false;
76 
77   RetainPtr<const CPDF_Name> pName =
78       ToName(pFormDict->GetObjectFor(pdfium::page_object::kType)->GetDirect());
79   return pName && pName->GetString() == "Page";
80 }
81 
CalcBoundingBox(CPDF_PageObject * pPageObj)82 void CalcBoundingBox(CPDF_PageObject* pPageObj) {
83   switch (pPageObj->GetType()) {
84     case CPDF_PageObject::Type::kText: {
85       break;
86     }
87     case CPDF_PageObject::Type::kPath: {
88       CPDF_PathObject* pPathObj = pPageObj->AsPath();
89       pPathObj->CalcBoundingBox();
90       break;
91     }
92     case CPDF_PageObject::Type::kImage: {
93       CPDF_ImageObject* pImageObj = pPageObj->AsImage();
94       pImageObj->CalcBoundingBox();
95       break;
96     }
97     case CPDF_PageObject::Type::kShading: {
98       CPDF_ShadingObject* pShadingObj = pPageObj->AsShading();
99       pShadingObj->CalcBoundingBox();
100       break;
101     }
102     case CPDF_PageObject::Type::kForm: {
103       CPDF_FormObject* pFormObj = pPageObj->AsForm();
104       pFormObj->CalcBoundingBox();
105       break;
106     }
107   }
108 }
109 
GetMarkParamDict(FPDF_PAGEOBJECTMARK mark)110 RetainPtr<CPDF_Dictionary> GetMarkParamDict(FPDF_PAGEOBJECTMARK mark) {
111   CPDF_ContentMarkItem* pMarkItem =
112       CPDFContentMarkItemFromFPDFPageObjectMark(mark);
113   return pMarkItem ? pMarkItem->GetParam() : nullptr;
114 }
115 
GetOrCreateMarkParamsDict(FPDF_DOCUMENT document,FPDF_PAGEOBJECTMARK mark)116 RetainPtr<CPDF_Dictionary> GetOrCreateMarkParamsDict(FPDF_DOCUMENT document,
117                                                      FPDF_PAGEOBJECTMARK mark) {
118   CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document);
119   if (!pDoc)
120     return nullptr;
121 
122   CPDF_ContentMarkItem* pMarkItem =
123       CPDFContentMarkItemFromFPDFPageObjectMark(mark);
124   if (!pMarkItem)
125     return nullptr;
126 
127   RetainPtr<CPDF_Dictionary> pParams = pMarkItem->GetParam();
128   if (!pParams) {
129     pParams = pDoc->New<CPDF_Dictionary>();
130     pMarkItem->SetDirectDict(pParams);
131   }
132   return pParams;
133 }
134 
PageObjectContainsMark(CPDF_PageObject * pPageObj,FPDF_PAGEOBJECTMARK mark)135 bool PageObjectContainsMark(CPDF_PageObject* pPageObj,
136                             FPDF_PAGEOBJECTMARK mark) {
137   const CPDF_ContentMarkItem* pMarkItem =
138       CPDFContentMarkItemFromFPDFPageObjectMark(mark);
139   return pMarkItem && pPageObj->GetContentMarks()->ContainsItem(pMarkItem);
140 }
141 
CPDFFormObjectFromFPDFPageObject(FPDF_PAGEOBJECT page_object)142 CPDF_FormObject* CPDFFormObjectFromFPDFPageObject(FPDF_PAGEOBJECT page_object) {
143   auto* pPageObj = CPDFPageObjectFromFPDFPageObject(page_object);
144   return pPageObj ? pPageObj->AsForm() : nullptr;
145 }
146 
CPDFPageObjHolderFromFPDFFormObject(FPDF_PAGEOBJECT page_object)147 const CPDF_PageObjectHolder* CPDFPageObjHolderFromFPDFFormObject(
148     FPDF_PAGEOBJECT page_object) {
149   CPDF_FormObject* pFormObject = CPDFFormObjectFromFPDFPageObject(page_object);
150   return pFormObject ? pFormObject->form() : nullptr;
151 }
152 
153 }  // namespace
154 
FPDF_CreateNewDocument()155 FPDF_EXPORT FPDF_DOCUMENT FPDF_CALLCONV FPDF_CreateNewDocument() {
156   auto pDoc =
157       std::make_unique<CPDF_Document>(std::make_unique<CPDF_DocRenderData>(),
158                                       std::make_unique<CPDF_DocPageData>());
159   pDoc->CreateNewDoc();
160 
161   time_t currentTime;
162   ByteString DateStr;
163   if (IsPDFSandboxPolicyEnabled(FPDF_POLICY_MACHINETIME_ACCESS)) {
164     if (FXSYS_time(&currentTime) != -1) {
165       tm* pTM = FXSYS_localtime(&currentTime);
166       if (pTM) {
167         DateStr = ByteString::Format(
168             "D:%04d%02d%02d%02d%02d%02d", pTM->tm_year + 1900, pTM->tm_mon + 1,
169             pTM->tm_mday, pTM->tm_hour, pTM->tm_min, pTM->tm_sec);
170       }
171     }
172   }
173 
174   RetainPtr<CPDF_Dictionary> pInfoDict = pDoc->GetInfo();
175   if (pInfoDict) {
176     if (IsPDFSandboxPolicyEnabled(FPDF_POLICY_MACHINETIME_ACCESS))
177       pInfoDict->SetNewFor<CPDF_String>("CreationDate", DateStr);
178     pInfoDict->SetNewFor<CPDF_String>("Creator", L"PDFium");
179   }
180 
181   // Caller takes ownership of pDoc.
182   return FPDFDocumentFromCPDFDocument(pDoc.release());
183 }
184 
FPDFPage_Delete(FPDF_DOCUMENT document,int page_index)185 FPDF_EXPORT void FPDF_CALLCONV FPDFPage_Delete(FPDF_DOCUMENT document,
186                                                int page_index) {
187   auto* pDoc = CPDFDocumentFromFPDFDocument(document);
188   if (!pDoc)
189     return;
190 
191   CPDF_Document::Extension* pExtension = pDoc->GetExtension();
192   const uint32_t page_obj_num = pExtension ? pExtension->DeletePage(page_index)
193                                            : pDoc->DeletePage(page_index);
194   pDoc->SetPageToNullObject(page_obj_num);
195 }
196 
197 FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
FPDF_MovePages(FPDF_DOCUMENT document,const int * page_indices,unsigned long page_indices_len,int dest_page_index)198 FPDF_MovePages(FPDF_DOCUMENT document,
199                const int* page_indices,
200                unsigned long page_indices_len,
201                int dest_page_index) {
202   auto* doc = CPDFDocumentFromFPDFDocument(document);
203   if (!doc) {
204     return false;
205   }
206 
207   // SAFETY: caller ensures `page_indices` points to at least
208   // `page_indices_len` ints.
209   return doc->MovePages(
210       UNSAFE_BUFFERS(pdfium::make_span(page_indices, page_indices_len)),
211       dest_page_index);
212 }
213 
FPDFPage_New(FPDF_DOCUMENT document,int page_index,double width,double height)214 FPDF_EXPORT FPDF_PAGE FPDF_CALLCONV FPDFPage_New(FPDF_DOCUMENT document,
215                                                  int page_index,
216                                                  double width,
217                                                  double height) {
218   CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document);
219   if (!pDoc)
220     return nullptr;
221 
222   page_index = std::clamp(page_index, 0, pDoc->GetPageCount());
223   RetainPtr<CPDF_Dictionary> pPageDict(pDoc->CreateNewPage(page_index));
224   if (!pPageDict)
225     return nullptr;
226 
227   pPageDict->SetRectFor(pdfium::page_object::kMediaBox,
228                         CFX_FloatRect(0, 0, width, height));
229   pPageDict->SetNewFor<CPDF_Number>(pdfium::page_object::kRotate, 0);
230   pPageDict->SetNewFor<CPDF_Dictionary>(pdfium::page_object::kResources);
231 
232 #ifdef PDF_ENABLE_XFA
233   if (pDoc->GetExtension()) {
234     auto pXFAPage = pdfium::MakeRetain<CPDFXFA_Page>(pDoc, page_index);
235     pXFAPage->LoadPDFPageFromDict(pPageDict);
236     return FPDFPageFromIPDFPage(pXFAPage.Leak());  // Caller takes ownership.
237   }
238 #endif  // PDF_ENABLE_XFA
239 
240   auto pPage = pdfium::MakeRetain<CPDF_Page>(pDoc, pPageDict);
241   pPage->AddPageImageCache();
242   pPage->ParseContent();
243 
244   return FPDFPageFromIPDFPage(pPage.Leak());  // Caller takes ownership.
245 }
246 
FPDFPage_GetRotation(FPDF_PAGE page)247 FPDF_EXPORT int FPDF_CALLCONV FPDFPage_GetRotation(FPDF_PAGE page) {
248   CPDF_Page* pPage = CPDFPageFromFPDFPage(page);
249   return IsPageObject(pPage) ? pPage->GetPageRotation() : -1;
250 }
251 
252 FPDF_EXPORT void FPDF_CALLCONV
FPDFPage_InsertObject(FPDF_PAGE page,FPDF_PAGEOBJECT page_object)253 FPDFPage_InsertObject(FPDF_PAGE page, FPDF_PAGEOBJECT page_object) {
254   CPDF_PageObject* pPageObj = CPDFPageObjectFromFPDFPageObject(page_object);
255   if (!pPageObj)
256     return;
257 
258   std::unique_ptr<CPDF_PageObject> pPageObjHolder(pPageObj);
259   CPDF_Page* pPage = CPDFPageFromFPDFPage(page);
260   if (!IsPageObject(pPage))
261     return;
262 
263   pPageObj->SetDirty(true);
264   pPage->AppendPageObject(std::move(pPageObjHolder));
265   CalcBoundingBox(pPageObj);
266 }
267 
268 FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
FPDFPage_RemoveObject(FPDF_PAGE page,FPDF_PAGEOBJECT page_object)269 FPDFPage_RemoveObject(FPDF_PAGE page, FPDF_PAGEOBJECT page_object) {
270   CPDF_PageObject* pPageObj = CPDFPageObjectFromFPDFPageObject(page_object);
271   if (!pPageObj)
272     return false;
273 
274   CPDF_Page* pPage = CPDFPageFromFPDFPage(page);
275   if (!IsPageObject(pPage))
276     return false;
277 
278   // Caller takes ownership.
279   return !!pPage->RemovePageObject(pPageObj).release();
280 }
281 
FPDFPage_CountObjects(FPDF_PAGE page)282 FPDF_EXPORT int FPDF_CALLCONV FPDFPage_CountObjects(FPDF_PAGE page) {
283   CPDF_Page* pPage = CPDFPageFromFPDFPage(page);
284   if (!IsPageObject(pPage))
285     return -1;
286 
287   return pdfium::checked_cast<int>(pPage->GetPageObjectCount());
288 }
289 
FPDFPage_GetObject(FPDF_PAGE page,int index)290 FPDF_EXPORT FPDF_PAGEOBJECT FPDF_CALLCONV FPDFPage_GetObject(FPDF_PAGE page,
291                                                              int index) {
292   CPDF_Page* pPage = CPDFPageFromFPDFPage(page);
293   if (!IsPageObject(pPage))
294     return nullptr;
295 
296   return FPDFPageObjectFromCPDFPageObject(pPage->GetPageObjectByIndex(index));
297 }
298 
FPDFPage_HasTransparency(FPDF_PAGE page)299 FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FPDFPage_HasTransparency(FPDF_PAGE page) {
300   CPDF_Page* pPage = CPDFPageFromFPDFPage(page);
301   return pPage && pPage->BackgroundAlphaNeeded();
302 }
303 
304 FPDF_EXPORT void FPDF_CALLCONV
FPDFPageObj_Destroy(FPDF_PAGEOBJECT page_object)305 FPDFPageObj_Destroy(FPDF_PAGEOBJECT page_object) {
306   delete CPDFPageObjectFromFPDFPageObject(page_object);
307 }
308 
309 FPDF_EXPORT int FPDF_CALLCONV
FPDFPageObj_GetMarkedContentID(FPDF_PAGEOBJECT page_object)310 FPDFPageObj_GetMarkedContentID(FPDF_PAGEOBJECT page_object) {
311   CPDF_PageObject* cpage_object = CPDFPageObjectFromFPDFPageObject(page_object);
312   if (!cpage_object) {
313     return -1;
314   }
315 
316   return cpage_object->GetContentMarks()->GetMarkedContentID();
317 }
318 
319 FPDF_EXPORT int FPDF_CALLCONV
FPDFPageObj_CountMarks(FPDF_PAGEOBJECT page_object)320 FPDFPageObj_CountMarks(FPDF_PAGEOBJECT page_object) {
321   CPDF_PageObject* pPageObj = CPDFPageObjectFromFPDFPageObject(page_object);
322   if (!pPageObj)
323     return -1;
324 
325   return pdfium::checked_cast<int>(pPageObj->GetContentMarks()->CountItems());
326 }
327 
328 FPDF_EXPORT FPDF_PAGEOBJECTMARK FPDF_CALLCONV
FPDFPageObj_GetMark(FPDF_PAGEOBJECT page_object,unsigned long index)329 FPDFPageObj_GetMark(FPDF_PAGEOBJECT page_object, unsigned long index) {
330   CPDF_PageObject* pPageObj = CPDFPageObjectFromFPDFPageObject(page_object);
331   if (!pPageObj)
332     return nullptr;
333 
334   CPDF_ContentMarks* pMarks = pPageObj->GetContentMarks();
335   if (index >= pMarks->CountItems())
336     return nullptr;
337 
338   return FPDFPageObjectMarkFromCPDFContentMarkItem(pMarks->GetItem(index));
339 }
340 
341 FPDF_EXPORT FPDF_PAGEOBJECTMARK FPDF_CALLCONV
FPDFPageObj_AddMark(FPDF_PAGEOBJECT page_object,FPDF_BYTESTRING name)342 FPDFPageObj_AddMark(FPDF_PAGEOBJECT page_object, FPDF_BYTESTRING name) {
343   CPDF_PageObject* pPageObj = CPDFPageObjectFromFPDFPageObject(page_object);
344   if (!pPageObj)
345     return nullptr;
346 
347   CPDF_ContentMarks* pMarks = pPageObj->GetContentMarks();
348   pMarks->AddMark(name);
349   pPageObj->SetDirty(true);
350 
351   const size_t index = pMarks->CountItems() - 1;
352   return FPDFPageObjectMarkFromCPDFContentMarkItem(pMarks->GetItem(index));
353 }
354 
355 FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
FPDFPageObj_RemoveMark(FPDF_PAGEOBJECT page_object,FPDF_PAGEOBJECTMARK mark)356 FPDFPageObj_RemoveMark(FPDF_PAGEOBJECT page_object, FPDF_PAGEOBJECTMARK mark) {
357   CPDF_PageObject* pPageObj = CPDFPageObjectFromFPDFPageObject(page_object);
358   CPDF_ContentMarkItem* pMarkItem =
359       CPDFContentMarkItemFromFPDFPageObjectMark(mark);
360   if (!pPageObj || !pMarkItem)
361     return false;
362 
363   if (!pPageObj->GetContentMarks()->RemoveMark(pMarkItem))
364     return false;
365 
366   pPageObj->SetDirty(true);
367   return true;
368 }
369 
370 FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
FPDFPageObjMark_GetName(FPDF_PAGEOBJECTMARK mark,FPDF_WCHAR * buffer,unsigned long buflen,unsigned long * out_buflen)371 FPDFPageObjMark_GetName(FPDF_PAGEOBJECTMARK mark,
372                         FPDF_WCHAR* buffer,
373                         unsigned long buflen,
374                         unsigned long* out_buflen) {
375   const CPDF_ContentMarkItem* pMarkItem =
376       CPDFContentMarkItemFromFPDFPageObjectMark(mark);
377   if (!pMarkItem || !out_buflen) {
378     return false;
379   }
380   // SAFETY: required from caller.
381   *out_buflen = Utf16EncodeMaybeCopyAndReturnLength(
382       WideString::FromUTF8(pMarkItem->GetName().AsStringView()),
383       UNSAFE_BUFFERS(SpanFromFPDFApiArgs(buffer, buflen)));
384   return true;
385 }
386 
387 FPDF_EXPORT int FPDF_CALLCONV
FPDFPageObjMark_CountParams(FPDF_PAGEOBJECTMARK mark)388 FPDFPageObjMark_CountParams(FPDF_PAGEOBJECTMARK mark) {
389   const CPDF_ContentMarkItem* pMarkItem =
390       CPDFContentMarkItemFromFPDFPageObjectMark(mark);
391   if (!pMarkItem)
392     return -1;
393 
394   RetainPtr<const CPDF_Dictionary> pParams = pMarkItem->GetParam();
395   return pParams ? fxcrt::CollectionSize<int>(*pParams) : 0;
396 }
397 
398 FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
FPDFPageObjMark_GetParamKey(FPDF_PAGEOBJECTMARK mark,unsigned long index,FPDF_WCHAR * buffer,unsigned long buflen,unsigned long * out_buflen)399 FPDFPageObjMark_GetParamKey(FPDF_PAGEOBJECTMARK mark,
400                             unsigned long index,
401                             FPDF_WCHAR* buffer,
402                             unsigned long buflen,
403                             unsigned long* out_buflen) {
404   if (!out_buflen)
405     return false;
406 
407   RetainPtr<const CPDF_Dictionary> pParams = GetMarkParamDict(mark);
408   if (!pParams)
409     return false;
410 
411   CPDF_DictionaryLocker locker(pParams);
412   for (auto& it : locker) {
413     if (index == 0) {
414       // SAFETY: required from caller.
415       *out_buflen = Utf16EncodeMaybeCopyAndReturnLength(
416           WideString::FromUTF8(it.first.AsStringView()),
417           UNSAFE_BUFFERS(SpanFromFPDFApiArgs(buffer, buflen)));
418       return true;
419     }
420     --index;
421   }
422 
423   return false;
424 }
425 
426 FPDF_EXPORT FPDF_OBJECT_TYPE FPDF_CALLCONV
FPDFPageObjMark_GetParamValueType(FPDF_PAGEOBJECTMARK mark,FPDF_BYTESTRING key)427 FPDFPageObjMark_GetParamValueType(FPDF_PAGEOBJECTMARK mark,
428                                   FPDF_BYTESTRING key) {
429   RetainPtr<const CPDF_Dictionary> pParams = GetMarkParamDict(mark);
430   if (!pParams)
431     return FPDF_OBJECT_UNKNOWN;
432 
433   RetainPtr<const CPDF_Object> pObject = pParams->GetObjectFor(key);
434   return pObject ? pObject->GetType() : FPDF_OBJECT_UNKNOWN;
435 }
436 
437 FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
FPDFPageObjMark_GetParamIntValue(FPDF_PAGEOBJECTMARK mark,FPDF_BYTESTRING key,int * out_value)438 FPDFPageObjMark_GetParamIntValue(FPDF_PAGEOBJECTMARK mark,
439                                  FPDF_BYTESTRING key,
440                                  int* out_value) {
441   if (!out_value)
442     return false;
443 
444   RetainPtr<const CPDF_Dictionary> pParams = GetMarkParamDict(mark);
445   if (!pParams)
446     return false;
447 
448   RetainPtr<const CPDF_Object> pObj = pParams->GetObjectFor(key);
449   if (!pObj || !pObj->IsNumber())
450     return false;
451 
452   *out_value = pObj->GetInteger();
453   return true;
454 }
455 
456 FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
FPDFPageObjMark_GetParamStringValue(FPDF_PAGEOBJECTMARK mark,FPDF_BYTESTRING key,FPDF_WCHAR * buffer,unsigned long buflen,unsigned long * out_buflen)457 FPDFPageObjMark_GetParamStringValue(FPDF_PAGEOBJECTMARK mark,
458                                     FPDF_BYTESTRING key,
459                                     FPDF_WCHAR* buffer,
460                                     unsigned long buflen,
461                                     unsigned long* out_buflen) {
462   if (!out_buflen)
463     return false;
464 
465   RetainPtr<const CPDF_Dictionary> pParams = GetMarkParamDict(mark);
466   if (!pParams)
467     return false;
468 
469   RetainPtr<const CPDF_Object> pObj = pParams->GetObjectFor(key);
470   if (!pObj || !pObj->IsString())
471     return false;
472 
473   // SAFETY: required from caller.
474   *out_buflen = Utf16EncodeMaybeCopyAndReturnLength(
475       WideString::FromUTF8(pObj->GetString().AsStringView()),
476       UNSAFE_BUFFERS(SpanFromFPDFApiArgs(buffer, buflen)));
477   return true;
478 }
479 
480 FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
FPDFPageObjMark_GetParamBlobValue(FPDF_PAGEOBJECTMARK mark,FPDF_BYTESTRING key,unsigned char * buffer,unsigned long buflen,unsigned long * out_buflen)481 FPDFPageObjMark_GetParamBlobValue(FPDF_PAGEOBJECTMARK mark,
482                                   FPDF_BYTESTRING key,
483                                   unsigned char* buffer,
484                                   unsigned long buflen,
485                                   unsigned long* out_buflen) {
486   if (!out_buflen)
487     return false;
488 
489   RetainPtr<const CPDF_Dictionary> pParams = GetMarkParamDict(mark);
490   if (!pParams)
491     return false;
492 
493   RetainPtr<const CPDF_Object> pObj = pParams->GetObjectFor(key);
494   if (!pObj || !pObj->IsString())
495     return false;
496 
497   // SAFETY: required from caller.
498   auto result_span = UNSAFE_BUFFERS(SpanFromFPDFApiArgs(buffer, buflen));
499   ByteString value = pObj->GetString();
500   fxcrt::try_spancpy(result_span, value.span());
501   *out_buflen = pdfium::checked_cast<unsigned long>(value.span().size());
502   return true;
503 }
504 
505 FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
FPDFPageObj_HasTransparency(FPDF_PAGEOBJECT page_object)506 FPDFPageObj_HasTransparency(FPDF_PAGEOBJECT page_object) {
507   CPDF_PageObject* pPageObj = CPDFPageObjectFromFPDFPageObject(page_object);
508   if (!pPageObj) {
509     return false;
510   }
511   if (pPageObj->general_state().GetBlendType() != BlendMode::kNormal) {
512     return true;
513   }
514   if (pPageObj->general_state().GetSoftMask()) {
515     return true;
516   }
517   if (pPageObj->general_state().GetFillAlpha() != 1.0f) {
518     return true;
519   }
520   if (pPageObj->IsPath() &&
521       pPageObj->general_state().GetStrokeAlpha() != 1.0f) {
522     return true;
523   }
524   if (!pPageObj->IsForm()) {
525     return false;
526   }
527 
528   const CPDF_Form* pForm = pPageObj->AsForm()->form();
529   if (!pForm) {
530     return false;
531   }
532 
533   const CPDF_Transparency& trans = pForm->GetTransparency();
534   return trans.IsGroup() || trans.IsIsolated();
535 }
536 
537 FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
FPDFPageObjMark_SetIntParam(FPDF_DOCUMENT document,FPDF_PAGEOBJECT page_object,FPDF_PAGEOBJECTMARK mark,FPDF_BYTESTRING key,int value)538 FPDFPageObjMark_SetIntParam(FPDF_DOCUMENT document,
539                             FPDF_PAGEOBJECT page_object,
540                             FPDF_PAGEOBJECTMARK mark,
541                             FPDF_BYTESTRING key,
542                             int value) {
543   CPDF_PageObject* pPageObj = CPDFPageObjectFromFPDFPageObject(page_object);
544   if (!pPageObj || !PageObjectContainsMark(pPageObj, mark))
545     return false;
546 
547   RetainPtr<CPDF_Dictionary> pParams =
548       GetOrCreateMarkParamsDict(document, mark);
549   if (!pParams)
550     return false;
551 
552   pParams->SetNewFor<CPDF_Number>(key, value);
553   pPageObj->SetDirty(true);
554   return true;
555 }
556 
557 FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
FPDFPageObjMark_SetStringParam(FPDF_DOCUMENT document,FPDF_PAGEOBJECT page_object,FPDF_PAGEOBJECTMARK mark,FPDF_BYTESTRING key,FPDF_BYTESTRING value)558 FPDFPageObjMark_SetStringParam(FPDF_DOCUMENT document,
559                                FPDF_PAGEOBJECT page_object,
560                                FPDF_PAGEOBJECTMARK mark,
561                                FPDF_BYTESTRING key,
562                                FPDF_BYTESTRING value) {
563   CPDF_PageObject* pPageObj = CPDFPageObjectFromFPDFPageObject(page_object);
564   if (!pPageObj || !PageObjectContainsMark(pPageObj, mark))
565     return false;
566 
567   RetainPtr<CPDF_Dictionary> pParams =
568       GetOrCreateMarkParamsDict(document, mark);
569   if (!pParams)
570     return false;
571 
572   pParams->SetNewFor<CPDF_String>(key, value);
573   pPageObj->SetDirty(true);
574   return true;
575 }
576 
577 FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
FPDFPageObjMark_SetBlobParam(FPDF_DOCUMENT document,FPDF_PAGEOBJECT page_object,FPDF_PAGEOBJECTMARK mark,FPDF_BYTESTRING key,const unsigned char * value,unsigned long value_len)578 FPDFPageObjMark_SetBlobParam(FPDF_DOCUMENT document,
579                              FPDF_PAGEOBJECT page_object,
580                              FPDF_PAGEOBJECTMARK mark,
581                              FPDF_BYTESTRING key,
582                              const unsigned char* value,
583                              unsigned long value_len) {
584   if (!value && value_len > 0) {
585     return false;
586   }
587 
588   CPDF_PageObject* pPageObj = CPDFPageObjectFromFPDFPageObject(page_object);
589   if (!pPageObj || !PageObjectContainsMark(pPageObj, mark)) {
590     return false;
591   }
592 
593   RetainPtr<CPDF_Dictionary> pParams =
594       GetOrCreateMarkParamsDict(document, mark);
595   if (!pParams) {
596     return false;
597   }
598 
599   // SAFETY: required from caller.
600   pParams->SetNewFor<CPDF_String>(
601       key, UNSAFE_BUFFERS(pdfium::make_span(value, value_len)),
602       CPDF_String::DataType::kIsHex);
603   pPageObj->SetDirty(true);
604   return true;
605 }
606 
607 FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
FPDFPageObjMark_RemoveParam(FPDF_PAGEOBJECT page_object,FPDF_PAGEOBJECTMARK mark,FPDF_BYTESTRING key)608 FPDFPageObjMark_RemoveParam(FPDF_PAGEOBJECT page_object,
609                             FPDF_PAGEOBJECTMARK mark,
610                             FPDF_BYTESTRING key) {
611   CPDF_PageObject* pPageObj = CPDFPageObjectFromFPDFPageObject(page_object);
612   if (!pPageObj)
613     return false;
614 
615   RetainPtr<CPDF_Dictionary> pParams = GetMarkParamDict(mark);
616   if (!pParams)
617     return false;
618 
619   auto removed = pParams->RemoveFor(key);
620   if (!removed)
621     return false;
622 
623   pPageObj->SetDirty(true);
624   return true;
625 }
626 
FPDFPageObj_GetType(FPDF_PAGEOBJECT page_object)627 FPDF_EXPORT int FPDF_CALLCONV FPDFPageObj_GetType(FPDF_PAGEOBJECT page_object) {
628   CPDF_PageObject* pPageObj = CPDFPageObjectFromFPDFPageObject(page_object);
629   return pPageObj ? static_cast<int>(pPageObj->GetType())
630                   : FPDF_PAGEOBJ_UNKNOWN;
631 }
632 
FPDFPageObj_SetIsActive(FPDF_PAGEOBJECT page_object,FPDF_BOOL active)633 FPDF_EXPORT FPDF_BOOL FPDFPageObj_SetIsActive(FPDF_PAGEOBJECT page_object,
634                                               FPDF_BOOL active) {
635   CPDF_PageObject* cpage_object = CPDFPageObjectFromFPDFPageObject(page_object);
636   if (!cpage_object) {
637     return false;
638   }
639 
640   cpage_object->SetIsActive(active);
641   return true;
642 }
643 
FPDFPage_GenerateContent(FPDF_PAGE page)644 FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FPDFPage_GenerateContent(FPDF_PAGE page) {
645   CPDF_Page* pPage = CPDFPageFromFPDFPage(page);
646   if (!IsPageObject(pPage))
647     return false;
648 
649   CPDF_PageContentGenerator CG(pPage);
650   CG.GenerateContent();
651   return true;
652 }
653 
654 FPDF_EXPORT void FPDF_CALLCONV
FPDFPageObj_Transform(FPDF_PAGEOBJECT page_object,double a,double b,double c,double d,double e,double f)655 FPDFPageObj_Transform(FPDF_PAGEOBJECT page_object,
656                       double a,
657                       double b,
658                       double c,
659                       double d,
660                       double e,
661                       double f) {
662   const FS_MATRIX matrix{static_cast<float>(a), static_cast<float>(b),
663                          static_cast<float>(c), static_cast<float>(d),
664                          static_cast<float>(e), static_cast<float>(f)};
665   FPDFPageObj_TransformF(page_object, &matrix);
666 }
667 
668 FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
FPDFPageObj_TransformF(FPDF_PAGEOBJECT page_object,const FS_MATRIX * matrix)669 FPDFPageObj_TransformF(FPDF_PAGEOBJECT page_object, const FS_MATRIX* matrix) {
670   if (!matrix) {
671     return false;
672   }
673 
674   CPDF_PageObject* cpage_object = CPDFPageObjectFromFPDFPageObject(page_object);
675   if (!cpage_object) {
676     return false;
677   }
678 
679   cpage_object->Transform(CFXMatrixFromFSMatrix(*matrix));
680   return true;
681 }
682 
683 FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
FPDFPageObj_GetMatrix(FPDF_PAGEOBJECT page_object,FS_MATRIX * matrix)684 FPDFPageObj_GetMatrix(FPDF_PAGEOBJECT page_object, FS_MATRIX* matrix) {
685   CPDF_PageObject* pPageObj = CPDFPageObjectFromFPDFPageObject(page_object);
686   if (!pPageObj || !matrix)
687     return false;
688 
689   switch (pPageObj->GetType()) {
690     case CPDF_PageObject::Type::kText:
691       *matrix = FSMatrixFromCFXMatrix(pPageObj->AsText()->GetTextMatrix());
692       return true;
693     case CPDF_PageObject::Type::kPath:
694       *matrix = FSMatrixFromCFXMatrix(pPageObj->AsPath()->matrix());
695       return true;
696     case CPDF_PageObject::Type::kImage:
697       *matrix = FSMatrixFromCFXMatrix(pPageObj->AsImage()->matrix());
698       return true;
699     case CPDF_PageObject::Type::kShading:
700       return false;
701     case CPDF_PageObject::Type::kForm:
702       *matrix = FSMatrixFromCFXMatrix(pPageObj->AsForm()->form_matrix());
703       return true;
704   }
705 }
706 
707 FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
FPDFPageObj_SetMatrix(FPDF_PAGEOBJECT page_object,const FS_MATRIX * matrix)708 FPDFPageObj_SetMatrix(FPDF_PAGEOBJECT page_object, const FS_MATRIX* matrix) {
709   CPDF_PageObject* pPageObj = CPDFPageObjectFromFPDFPageObject(page_object);
710   if (!pPageObj || !matrix)
711     return false;
712 
713   CFX_Matrix cmatrix = CFXMatrixFromFSMatrix(*matrix);
714   switch (pPageObj->GetType()) {
715     case CPDF_PageObject::Type::kText:
716       pPageObj->AsText()->SetTextMatrix(cmatrix);
717       break;
718     case CPDF_PageObject::Type::kPath:
719       pPageObj->AsPath()->SetPathMatrix(cmatrix);
720       break;
721     case CPDF_PageObject::Type::kImage:
722       pPageObj->AsImage()->SetImageMatrix(cmatrix);
723       break;
724     case CPDF_PageObject::Type::kShading:
725       return false;
726     case CPDF_PageObject::Type::kForm:
727       pPageObj->AsForm()->SetFormMatrix(cmatrix);
728       break;
729   }
730   pPageObj->SetDirty(true);
731   return true;
732 }
733 
734 FPDF_EXPORT void FPDF_CALLCONV
FPDFPageObj_SetBlendMode(FPDF_PAGEOBJECT page_object,FPDF_BYTESTRING blend_mode)735 FPDFPageObj_SetBlendMode(FPDF_PAGEOBJECT page_object,
736                          FPDF_BYTESTRING blend_mode) {
737   CPDF_PageObject* pPageObj = CPDFPageObjectFromFPDFPageObject(page_object);
738   if (!pPageObj)
739     return;
740 
741   pPageObj->mutable_general_state().SetBlendMode(blend_mode);
742   pPageObj->SetDirty(true);
743 }
744 
FPDFPage_TransformAnnots(FPDF_PAGE page,double a,double b,double c,double d,double e,double f)745 FPDF_EXPORT void FPDF_CALLCONV FPDFPage_TransformAnnots(FPDF_PAGE page,
746                                                         double a,
747                                                         double b,
748                                                         double c,
749                                                         double d,
750                                                         double e,
751                                                         double f) {
752   CPDF_Page* pPage = CPDFPageFromFPDFPage(page);
753   if (!pPage)
754     return;
755 
756   CPDF_AnnotList AnnotList(pPage);
757   for (size_t i = 0; i < AnnotList.Count(); ++i) {
758     CPDF_Annot* pAnnot = AnnotList.GetAt(i);
759     CFX_Matrix matrix((float)a, (float)b, (float)c, (float)d, (float)e,
760                       (float)f);
761     CFX_FloatRect rect = matrix.TransformRect(pAnnot->GetRect());
762 
763     RetainPtr<CPDF_Dictionary> pAnnotDict = pAnnot->GetMutableAnnotDict();
764     RetainPtr<CPDF_Array> pRectArray = pAnnotDict->GetMutableArrayFor("Rect");
765     if (pRectArray)
766       pRectArray->Clear();
767     else
768       pRectArray = pAnnotDict->SetNewFor<CPDF_Array>("Rect");
769 
770     pRectArray->AppendNew<CPDF_Number>(rect.left);
771     pRectArray->AppendNew<CPDF_Number>(rect.bottom);
772     pRectArray->AppendNew<CPDF_Number>(rect.right);
773     pRectArray->AppendNew<CPDF_Number>(rect.top);
774 
775     // TODO(unknown): Transform AP's rectangle
776   }
777 }
778 
FPDFPage_SetRotation(FPDF_PAGE page,int rotate)779 FPDF_EXPORT void FPDF_CALLCONV FPDFPage_SetRotation(FPDF_PAGE page,
780                                                     int rotate) {
781   CPDF_Page* pPage = CPDFPageFromFPDFPage(page);
782   if (!IsPageObject(pPage))
783     return;
784 
785   rotate %= 4;
786   pPage->GetMutableDict()->SetNewFor<CPDF_Number>(pdfium::page_object::kRotate,
787                                                   rotate * 90);
788   pPage->UpdateDimensions();
789 }
790 
FPDFPageObj_SetFillColor(FPDF_PAGEOBJECT page_object,unsigned int R,unsigned int G,unsigned int B,unsigned int A)791 FPDF_BOOL FPDFPageObj_SetFillColor(FPDF_PAGEOBJECT page_object,
792                                    unsigned int R,
793                                    unsigned int G,
794                                    unsigned int B,
795                                    unsigned int A) {
796   CPDF_PageObject* pPageObj = CPDFPageObjectFromFPDFPageObject(page_object);
797   if (!pPageObj || R > 255 || G > 255 || B > 255 || A > 255)
798     return false;
799 
800   std::vector<float> rgb = {R / 255.f, G / 255.f, B / 255.f};
801   pPageObj->mutable_general_state().SetFillAlpha(A / 255.f);
802   pPageObj->mutable_color_state().SetFillColor(
803       CPDF_ColorSpace::GetStockCS(CPDF_ColorSpace::Family::kDeviceRGB),
804       std::move(rgb));
805   pPageObj->SetDirty(true);
806   return true;
807 }
808 
809 FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
FPDFPageObj_GetFillColor(FPDF_PAGEOBJECT page_object,unsigned int * R,unsigned int * G,unsigned int * B,unsigned int * A)810 FPDFPageObj_GetFillColor(FPDF_PAGEOBJECT page_object,
811                          unsigned int* R,
812                          unsigned int* G,
813                          unsigned int* B,
814                          unsigned int* A) {
815   auto* pPageObj = CPDFPageObjectFromFPDFPageObject(page_object);
816   if (!pPageObj || !R || !G || !B || !A)
817     return false;
818 
819   if (!pPageObj->color_state().HasRef()) {
820     return false;
821   }
822 
823   FX_COLORREF fill_color = pPageObj->color_state().GetFillColorRef();
824   *R = FXSYS_GetRValue(fill_color);
825   *G = FXSYS_GetGValue(fill_color);
826   *B = FXSYS_GetBValue(fill_color);
827   *A = FXSYS_GetUnsignedAlpha(pPageObj->general_state().GetFillAlpha());
828   return true;
829 }
830 
831 FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
FPDFPageObj_GetBounds(FPDF_PAGEOBJECT page_object,float * left,float * bottom,float * right,float * top)832 FPDFPageObj_GetBounds(FPDF_PAGEOBJECT page_object,
833                       float* left,
834                       float* bottom,
835                       float* right,
836                       float* top) {
837   CPDF_PageObject* pPageObj = CPDFPageObjectFromFPDFPageObject(page_object);
838   if (!pPageObj)
839     return false;
840 
841   const CFX_FloatRect& bbox = pPageObj->GetRect();
842   *left = bbox.left;
843   *bottom = bbox.bottom;
844   *right = bbox.right;
845   *top = bbox.top;
846   return true;
847 }
848 
849 FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
FPDFPageObj_GetRotatedBounds(FPDF_PAGEOBJECT page_object,FS_QUADPOINTSF * quad_points)850 FPDFPageObj_GetRotatedBounds(FPDF_PAGEOBJECT page_object,
851                              FS_QUADPOINTSF* quad_points) {
852   CPDF_PageObject* cpage_object = CPDFPageObjectFromFPDFPageObject(page_object);
853   if (!cpage_object || !quad_points)
854     return false;
855 
856   CFX_Matrix matrix;
857   switch (cpage_object->GetType()) {
858     case CPDF_PageObject::Type::kText:
859       matrix = cpage_object->AsText()->GetTextMatrix();
860       break;
861     case CPDF_PageObject::Type::kImage:
862       matrix = cpage_object->AsImage()->matrix();
863       break;
864     default:
865       // TODO(crbug.com/pdfium/1840): Support more object types.
866       return false;
867   }
868 
869   const CFX_FloatRect& bbox = cpage_object->GetOriginalRect();
870   const CFX_PointF bottom_left = matrix.Transform({bbox.left, bbox.bottom});
871   const CFX_PointF bottom_right = matrix.Transform({bbox.right, bbox.bottom});
872   const CFX_PointF top_right = matrix.Transform({bbox.right, bbox.top});
873   const CFX_PointF top_left = matrix.Transform({bbox.left, bbox.top});
874 
875   // See PDF 32000-1:2008, figure 64 for the QuadPoints ordering.
876   quad_points->x1 = bottom_left.x;
877   quad_points->y1 = bottom_left.y;
878   quad_points->x2 = bottom_right.x;
879   quad_points->y2 = bottom_right.y;
880   quad_points->x3 = top_right.x;
881   quad_points->y3 = top_right.y;
882   quad_points->x4 = top_left.x;
883   quad_points->y4 = top_left.y;
884   return true;
885 }
886 
887 FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
FPDFPageObj_SetStrokeColor(FPDF_PAGEOBJECT page_object,unsigned int R,unsigned int G,unsigned int B,unsigned int A)888 FPDFPageObj_SetStrokeColor(FPDF_PAGEOBJECT page_object,
889                            unsigned int R,
890                            unsigned int G,
891                            unsigned int B,
892                            unsigned int A) {
893   auto* pPageObj = CPDFPageObjectFromFPDFPageObject(page_object);
894   if (!pPageObj || R > 255 || G > 255 || B > 255 || A > 255)
895     return false;
896 
897   std::vector<float> rgb = {R / 255.f, G / 255.f, B / 255.f};
898   pPageObj->mutable_general_state().SetStrokeAlpha(A / 255.f);
899   pPageObj->mutable_color_state().SetStrokeColor(
900       CPDF_ColorSpace::GetStockCS(CPDF_ColorSpace::Family::kDeviceRGB),
901       std::move(rgb));
902   pPageObj->SetDirty(true);
903   return true;
904 }
905 
906 FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
FPDFPageObj_GetStrokeColor(FPDF_PAGEOBJECT page_object,unsigned int * R,unsigned int * G,unsigned int * B,unsigned int * A)907 FPDFPageObj_GetStrokeColor(FPDF_PAGEOBJECT page_object,
908                            unsigned int* R,
909                            unsigned int* G,
910                            unsigned int* B,
911                            unsigned int* A) {
912   auto* pPageObj = CPDFPageObjectFromFPDFPageObject(page_object);
913   if (!pPageObj || !R || !G || !B || !A) {
914     return false;
915   }
916   if (!pPageObj->color_state().HasRef()) {
917     return false;
918   }
919 
920   FX_COLORREF stroke_color = pPageObj->color_state().GetStrokeColorRef();
921   *R = FXSYS_GetRValue(stroke_color);
922   *G = FXSYS_GetGValue(stroke_color);
923   *B = FXSYS_GetBValue(stroke_color);
924   *A = FXSYS_GetUnsignedAlpha(pPageObj->general_state().GetStrokeAlpha());
925   return true;
926 }
927 
928 FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
FPDFPageObj_SetStrokeWidth(FPDF_PAGEOBJECT page_object,float width)929 FPDFPageObj_SetStrokeWidth(FPDF_PAGEOBJECT page_object, float width) {
930   auto* pPageObj = CPDFPageObjectFromFPDFPageObject(page_object);
931   if (!pPageObj || width < 0.0f)
932     return false;
933 
934   pPageObj->mutable_graph_state().SetLineWidth(width);
935   pPageObj->SetDirty(true);
936   return true;
937 }
938 
939 FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
FPDFPageObj_GetStrokeWidth(FPDF_PAGEOBJECT page_object,float * width)940 FPDFPageObj_GetStrokeWidth(FPDF_PAGEOBJECT page_object, float* width) {
941   auto* pPageObj = CPDFPageObjectFromFPDFPageObject(page_object);
942   if (!pPageObj || !width)
943     return false;
944 
945   *width = pPageObj->graph_state().GetLineWidth();
946   return true;
947 }
948 
949 FPDF_EXPORT int FPDF_CALLCONV
FPDFPageObj_GetLineJoin(FPDF_PAGEOBJECT page_object)950 FPDFPageObj_GetLineJoin(FPDF_PAGEOBJECT page_object) {
951   auto* pPageObj = CPDFPageObjectFromFPDFPageObject(page_object);
952   return pPageObj ? static_cast<int>(pPageObj->graph_state().GetLineJoin())
953                   : -1;
954 }
955 
956 FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
FPDFPageObj_SetLineJoin(FPDF_PAGEOBJECT page_object,int line_join)957 FPDFPageObj_SetLineJoin(FPDF_PAGEOBJECT page_object, int line_join) {
958   auto* pPageObj = CPDFPageObjectFromFPDFPageObject(page_object);
959   if (!pPageObj)
960     return false;
961 
962   if (line_join < FPDF_LINEJOIN_MITER || line_join > FPDF_LINEJOIN_BEVEL)
963     return false;
964 
965   pPageObj->mutable_graph_state().SetLineJoin(
966       static_cast<CFX_GraphStateData::LineJoin>(line_join));
967   pPageObj->SetDirty(true);
968   return true;
969 }
970 
971 FPDF_EXPORT int FPDF_CALLCONV
FPDFPageObj_GetLineCap(FPDF_PAGEOBJECT page_object)972 FPDFPageObj_GetLineCap(FPDF_PAGEOBJECT page_object) {
973   auto* pPageObj = CPDFPageObjectFromFPDFPageObject(page_object);
974   return pPageObj ? static_cast<int>(pPageObj->graph_state().GetLineCap()) : -1;
975 }
976 
977 FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
FPDFPageObj_SetLineCap(FPDF_PAGEOBJECT page_object,int line_cap)978 FPDFPageObj_SetLineCap(FPDF_PAGEOBJECT page_object, int line_cap) {
979   auto* pPageObj = CPDFPageObjectFromFPDFPageObject(page_object);
980   if (!pPageObj)
981     return false;
982 
983   if (line_cap < FPDF_LINECAP_BUTT ||
984       line_cap > FPDF_LINECAP_PROJECTING_SQUARE) {
985     return false;
986   }
987   pPageObj->mutable_graph_state().SetLineCap(
988       static_cast<CFX_GraphStateData::LineCap>(line_cap));
989   pPageObj->SetDirty(true);
990   return true;
991 }
992 
993 FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
FPDFPageObj_GetDashPhase(FPDF_PAGEOBJECT page_object,float * phase)994 FPDFPageObj_GetDashPhase(FPDF_PAGEOBJECT page_object, float* phase) {
995   auto* pPageObj = CPDFPageObjectFromFPDFPageObject(page_object);
996   if (!pPageObj || !phase)
997     return false;
998 
999   *phase = pPageObj->graph_state().GetLineDashPhase();
1000   return true;
1001 }
1002 
1003 FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
FPDFPageObj_SetDashPhase(FPDF_PAGEOBJECT page_object,float phase)1004 FPDFPageObj_SetDashPhase(FPDF_PAGEOBJECT page_object, float phase) {
1005   auto* pPageObj = CPDFPageObjectFromFPDFPageObject(page_object);
1006   if (!pPageObj)
1007     return false;
1008 
1009   pPageObj->mutable_graph_state().SetLineDashPhase(phase);
1010   pPageObj->SetDirty(true);
1011   return true;
1012 }
1013 
1014 FPDF_EXPORT int FPDF_CALLCONV
FPDFPageObj_GetDashCount(FPDF_PAGEOBJECT page_object)1015 FPDFPageObj_GetDashCount(FPDF_PAGEOBJECT page_object) {
1016   auto* pPageObj = CPDFPageObjectFromFPDFPageObject(page_object);
1017   return pPageObj ? pdfium::checked_cast<int>(
1018                         pPageObj->graph_state().GetLineDashSize())
1019                   : -1;
1020 }
1021 
1022 FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
FPDFPageObj_GetDashArray(FPDF_PAGEOBJECT page_object,float * dash_array,size_t dash_count)1023 FPDFPageObj_GetDashArray(FPDF_PAGEOBJECT page_object,
1024                          float* dash_array,
1025                          size_t dash_count) {
1026   if (!dash_array) {
1027     return false;
1028   }
1029   auto* pPageObj = CPDFPageObjectFromFPDFPageObject(page_object);
1030   if (!pPageObj) {
1031     return false;
1032   }
1033 
1034   // SAFETY: required from caller.
1035   auto result_span = UNSAFE_BUFFERS(pdfium::make_span(dash_array, dash_count));
1036   auto dash_vector = pPageObj->graph_state().GetLineDashArray();
1037   return fxcrt::try_spancpy(result_span, pdfium::make_span(dash_vector));
1038 }
1039 
1040 FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
FPDFPageObj_SetDashArray(FPDF_PAGEOBJECT page_object,const float * dash_array,size_t dash_count,float phase)1041 FPDFPageObj_SetDashArray(FPDF_PAGEOBJECT page_object,
1042                          const float* dash_array,
1043                          size_t dash_count,
1044                          float phase) {
1045   if (dash_count > 0 && !dash_array)
1046     return false;
1047 
1048   auto* pPageObj = CPDFPageObjectFromFPDFPageObject(page_object);
1049   if (!pPageObj)
1050     return false;
1051 
1052   std::vector<float> dashes;
1053   if (dash_count > 0) {
1054     dashes.reserve(dash_count);
1055     dashes.assign(dash_array, UNSAFE_TODO(dash_array + dash_count));
1056   }
1057   pPageObj->mutable_graph_state().SetLineDash(dashes, phase);
1058   pPageObj->SetDirty(true);
1059   return true;
1060 }
1061 
1062 FPDF_EXPORT int FPDF_CALLCONV
FPDFFormObj_CountObjects(FPDF_PAGEOBJECT form_object)1063 FPDFFormObj_CountObjects(FPDF_PAGEOBJECT form_object) {
1064   const auto* pObjectList = CPDFPageObjHolderFromFPDFFormObject(form_object);
1065   return pObjectList
1066              ? pdfium::checked_cast<int>(pObjectList->GetPageObjectCount())
1067              : -1;
1068 }
1069 
1070 FPDF_EXPORT FPDF_PAGEOBJECT FPDF_CALLCONV
FPDFFormObj_GetObject(FPDF_PAGEOBJECT form_object,unsigned long index)1071 FPDFFormObj_GetObject(FPDF_PAGEOBJECT form_object, unsigned long index) {
1072   const auto* pObjectList = CPDFPageObjHolderFromFPDFFormObject(form_object);
1073   if (!pObjectList)
1074     return nullptr;
1075 
1076   return FPDFPageObjectFromCPDFPageObject(
1077       pObjectList->GetPageObjectByIndex(index));
1078 }
1079