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 "../../../include/fpdfapi/fpdf_page.h"
8 #include "../../../include/fpdfapi/fpdf_module.h"
9 #include "pageint.h"
Create(int type)10 CPDF_PageObject* CPDF_PageObject::Create(int type)
11 {
12     switch (type) {
13         case PDFPAGE_TEXT:
14             return new CPDF_TextObject;
15         case PDFPAGE_IMAGE:
16             return new CPDF_ImageObject;
17         case PDFPAGE_PATH:
18             return new CPDF_PathObject;
19         case PDFPAGE_SHADING:
20             return new CPDF_ShadingObject;
21         case PDFPAGE_FORM:
22             return new CPDF_FormObject;
23     }
24     return NULL;
25 }
~CPDF_PageObject()26 CPDF_PageObject::~CPDF_PageObject()
27 {
28 }
Clone() const29 CPDF_PageObject* CPDF_PageObject::Clone() const
30 {
31     CPDF_PageObject* pObj = Create(m_Type);
32     pObj->Copy(this);
33     return pObj;
34 }
Copy(const CPDF_PageObject * pSrc)35 void CPDF_PageObject::Copy(const CPDF_PageObject* pSrc)
36 {
37     if (m_Type != pSrc->m_Type) {
38         return;
39     }
40     CopyData(pSrc);
41     CopyStates(*pSrc);
42     m_Left = pSrc->m_Left;
43     m_Right = pSrc->m_Right;
44     m_Top = pSrc->m_Top;
45     m_Bottom = pSrc->m_Bottom;
46 }
AppendClipPath(CPDF_Path path,int type,FX_BOOL bAutoMerge)47 void CPDF_PageObject::AppendClipPath(CPDF_Path path, int type, FX_BOOL bAutoMerge)
48 {
49     m_ClipPath.AppendPath(path, type, bAutoMerge);
50 }
CopyClipPath(CPDF_PageObject * pObj)51 void CPDF_PageObject::CopyClipPath(CPDF_PageObject* pObj)
52 {
53     m_ClipPath = pObj->m_ClipPath;
54 }
RemoveClipPath()55 void CPDF_PageObject::RemoveClipPath()
56 {
57     m_ClipPath.SetNull();
58 }
RecalcBBox()59 void CPDF_PageObject::RecalcBBox()
60 {
61     switch (m_Type) {
62         case PDFPAGE_TEXT:
63             ((CPDF_TextObject*)this)->RecalcPositionData();
64             break;
65         case PDFPAGE_PATH:
66             ((CPDF_PathObject*)this)->CalcBoundingBox();
67             break;
68         case PDFPAGE_SHADING:
69             ((CPDF_ShadingObject*)this)->CalcBoundingBox();
70             break;
71     }
72 }
TransformClipPath(CFX_AffineMatrix & matrix)73 void CPDF_PageObject::TransformClipPath(CFX_AffineMatrix& matrix)
74 {
75     if (m_ClipPath.IsNull()) {
76         return;
77     }
78     m_ClipPath.GetModify();
79     m_ClipPath.Transform(matrix);
80 }
TransformGeneralState(CFX_AffineMatrix & matrix)81 void CPDF_PageObject::TransformGeneralState(CFX_AffineMatrix& matrix)
82 {
83     if(m_GeneralState.IsNull()) {
84         return;
85     }
86     CPDF_GeneralStateData* pGS = m_GeneralState.GetModify();
87     pGS->m_Matrix.Concat(matrix);
88 }
GetBBox(const CFX_AffineMatrix * pMatrix) const89 FX_RECT CPDF_PageObject::GetBBox(const CFX_AffineMatrix* pMatrix) const
90 {
91     CFX_FloatRect rect(m_Left, m_Bottom, m_Right, m_Top);
92     if (pMatrix) {
93         pMatrix->TransformRect(rect);
94     }
95     return rect.GetOutterRect();
96 }
CPDF_TextObject()97 CPDF_TextObject::CPDF_TextObject()
98 {
99     m_Type = PDFPAGE_TEXT;
100     m_pCharCodes = NULL;
101     m_pCharPos = NULL;
102     m_nChars = 0;
103     m_PosX = m_PosY = 0;
104 }
~CPDF_TextObject()105 CPDF_TextObject::~CPDF_TextObject()
106 {
107     if (m_nChars > 1 && m_pCharCodes) {
108         FX_Free(m_pCharCodes);
109     }
110     if (m_pCharPos) {
111         FX_Free(m_pCharPos);
112     }
113 }
GetItemInfo(int index,CPDF_TextObjectItem * pInfo) const114 void CPDF_TextObject::GetItemInfo(int index, CPDF_TextObjectItem* pInfo) const
115 {
116     pInfo->m_CharCode = m_nChars == 1 ? (FX_DWORD)(FX_UINTPTR)m_pCharCodes : m_pCharCodes[index];
117     pInfo->m_OriginX = index ? m_pCharPos[index - 1] : 0;
118     pInfo->m_OriginY = 0;
119     if (pInfo->m_CharCode == -1) {
120         return;
121     }
122     CPDF_Font* pFont = m_TextState.GetFont();
123     if (pFont->GetFontType() != PDFFONT_CIDFONT) {
124         return;
125     }
126     if (!((CPDF_CIDFont*)pFont)->IsVertWriting()) {
127         return;
128     }
129     FX_WORD CID = ((CPDF_CIDFont*)pFont)->CIDFromCharCode(pInfo->m_CharCode);
130     pInfo->m_OriginY = pInfo->m_OriginX;
131     pInfo->m_OriginX = 0;
132     short vx, vy;
133     ((CPDF_CIDFont*)pFont)->GetVertOrigin(CID, vx, vy);
134     FX_FLOAT fontsize = m_TextState.GetFontSize();
135     pInfo->m_OriginX -= fontsize * vx / 1000;
136     pInfo->m_OriginY -= fontsize * vy / 1000;
137 }
CountChars() const138 int CPDF_TextObject::CountChars() const
139 {
140     if (m_nChars == 1) {
141         return 1;
142     }
143     int count = 0;
144     for (int i = 0; i < m_nChars; i ++)
145         if (m_pCharCodes[i] != (FX_DWORD) - 1) {
146             count ++;
147         }
148     return count;
149 }
GetCharInfo(int index,FX_DWORD & charcode,FX_FLOAT & kerning) const150 void CPDF_TextObject::GetCharInfo(int index, FX_DWORD& charcode, FX_FLOAT& kerning) const
151 {
152     if (m_nChars == 1) {
153         charcode = (FX_DWORD)(FX_UINTPTR)m_pCharCodes;
154         kerning = 0;
155         return;
156     }
157     int count = 0;
158     for (int i = 0; i < m_nChars; i ++) {
159         if (m_pCharCodes[i] != (FX_DWORD) - 1) {
160             if (count == index) {
161                 charcode = m_pCharCodes[i];
162                 if (i == m_nChars - 1 || m_pCharCodes[i + 1] != (FX_DWORD) - 1) {
163                     kerning = 0;
164                 } else {
165                     kerning = m_pCharPos[i];
166                 }
167                 return;
168             }
169             count ++;
170         }
171     }
172 }
GetCharInfo(int index,CPDF_TextObjectItem * pInfo) const173 void CPDF_TextObject::GetCharInfo(int index, CPDF_TextObjectItem* pInfo) const
174 {
175     if (m_nChars == 1) {
176         GetItemInfo(0, pInfo);
177         return;
178     }
179     int count = 0;
180     for (int i = 0; i < m_nChars; i ++) {
181         FX_DWORD charcode = m_pCharCodes[i];
182         if (charcode == (FX_DWORD) - 1) {
183             continue;
184         }
185         if (count == index) {
186             GetItemInfo(i, pInfo);
187             break;
188         }
189         count ++;
190     }
191 }
CopyData(const CPDF_PageObject * pSrc)192 void CPDF_TextObject::CopyData(const CPDF_PageObject* pSrc)
193 {
194     const CPDF_TextObject* pSrcObj = (const CPDF_TextObject*)pSrc;
195     if (m_nChars > 1 && m_pCharCodes) {
196         FX_Free(m_pCharCodes);
197         m_pCharCodes = NULL;
198     }
199     if (m_pCharPos) {
200         FX_Free(m_pCharPos);
201         m_pCharPos = NULL;
202     }
203     m_nChars = pSrcObj->m_nChars;
204     if (m_nChars > 1) {
205         m_pCharCodes = FX_Alloc(FX_DWORD, m_nChars);
206         m_pCharPos = FX_Alloc(FX_FLOAT, m_nChars - 1);
207         for (int i = 0; i < m_nChars; i ++) {
208             m_pCharCodes[i] = pSrcObj->m_pCharCodes[i];
209         }
210         for (int i = 0; i < m_nChars - 1; i ++) {
211             m_pCharPos[i] = pSrcObj->m_pCharPos[i];
212         }
213     } else {
214         m_pCharCodes = pSrcObj->m_pCharCodes;
215     }
216     m_PosX = pSrcObj->m_PosX;
217     m_PosY = pSrcObj->m_PosY;
218 }
GetTextMatrix(CFX_AffineMatrix * pMatrix) const219 void CPDF_TextObject::GetTextMatrix(CFX_AffineMatrix* pMatrix) const
220 {
221     FX_FLOAT* pTextMatrix = m_TextState.GetMatrix();
222     pMatrix->Set(pTextMatrix[0], pTextMatrix[2], pTextMatrix[1], pTextMatrix[3], m_PosX, m_PosY);
223 }
SetSegments(const CFX_ByteString * pStrs,FX_FLOAT * pKerning,int nsegs)224 void CPDF_TextObject::SetSegments(const CFX_ByteString* pStrs, FX_FLOAT* pKerning, int nsegs)
225 {
226     if (m_nChars > 1 && m_pCharCodes) {
227         FX_Free(m_pCharCodes);
228         m_pCharCodes = NULL;
229     }
230     if (m_pCharPos) {
231         FX_Free(m_pCharPos);
232         m_pCharPos = NULL;
233     }
234     CPDF_Font* pFont = m_TextState.GetFont();
235     m_nChars = 0;
236     for (int i = 0; i < nsegs; i ++) {
237         m_nChars += pFont->CountChar(pStrs[i], pStrs[i].GetLength());
238     }
239     m_nChars += nsegs - 1;
240     if (m_nChars > 1) {
241         m_pCharCodes = FX_Alloc(FX_DWORD, m_nChars);
242         m_pCharPos = FX_Alloc(FX_FLOAT, m_nChars - 1);
243         int index = 0;
244         for (int i = 0; i < nsegs; i ++) {
245             FX_LPCSTR segment = pStrs[i];
246             int offset = 0, len = pStrs[i].GetLength();
247             while (offset < len) {
248                 m_pCharCodes[index++] = pFont->GetNextChar(segment, len, offset);
249             }
250             if (i != nsegs - 1) {
251                 m_pCharPos[index - 1] = pKerning[i];
252                 m_pCharCodes[index ++] = (FX_DWORD) - 1;
253             }
254         }
255     } else {
256         int offset = 0;
257         m_pCharCodes = (FX_DWORD*)(FX_UINTPTR)pFont->GetNextChar(pStrs[0], pStrs[0].GetLength(), offset);
258     }
259 }
SetText(const CFX_ByteString & str)260 void CPDF_TextObject::SetText(const CFX_ByteString& str)
261 {
262     SetSegments(&str, NULL, 1);
263     RecalcPositionData();
264 }
SetEmpty()265 void CPDF_TextObject::SetEmpty()
266 {
267     if (m_nChars > 1 && m_pCharCodes) {
268         FX_Free(m_pCharCodes);
269     }
270     if (m_nChars > 1 && m_pCharPos) {
271         FX_Free(m_pCharPos);
272     }
273     m_nChars = 0;
274     m_pCharCodes = NULL;
275     m_pCharPos = NULL;
276     m_Left = m_Right = m_PosX;
277     m_Top = m_Bottom = m_PosY;
278 }
SetText(CFX_ByteString * pStrs,FX_FLOAT * pKerning,int nSegs)279 void CPDF_TextObject::SetText(CFX_ByteString* pStrs, FX_FLOAT* pKerning, int nSegs)
280 {
281     SetSegments(pStrs, pKerning, nSegs);
282     RecalcPositionData();
283 }
SetText(int nChars,FX_DWORD * pCharCodes,FX_FLOAT * pKernings)284 void CPDF_TextObject::SetText(int nChars, FX_DWORD* pCharCodes, FX_FLOAT* pKernings)
285 {
286     if (m_nChars > 1 && m_pCharCodes) {
287         FX_Free(m_pCharCodes);
288         m_pCharCodes = NULL;
289     }
290     if (m_pCharPos) {
291         FX_Free(m_pCharPos);
292         m_pCharPos = NULL;
293     }
294     int nKernings = 0;
295     int i;
296     for (i = 0; i < nChars - 1; i ++)
297         if (pKernings[i] != 0) {
298             nKernings ++;
299         }
300     m_nChars = nChars + nKernings;
301     if (m_nChars > 1) {
302         m_pCharCodes = FX_Alloc(FX_DWORD, m_nChars);
303         m_pCharPos = FX_Alloc(FX_FLOAT, m_nChars - 1);
304         int index = 0;
305         for (int i = 0; i < nChars; i ++) {
306             m_pCharCodes[index++] = pCharCodes[i];
307             if (pKernings[i] != 0 && i != nChars - 1) {
308                 m_pCharCodes[index] = (FX_DWORD) - 1;
309                 m_pCharPos[index - 1] = pKernings[i];
310                 index ++;
311             }
312         }
313     } else {
314         m_pCharCodes = (FX_DWORD*)(FX_UINTPTR)pCharCodes[0];
315     }
316     RecalcPositionData();
317 }
GetCharWidth(FX_DWORD charcode) const318 FX_FLOAT CPDF_TextObject::GetCharWidth(FX_DWORD charcode) const
319 {
320     FX_FLOAT fontsize = m_TextState.GetFontSize() / 1000;
321     CPDF_Font* pFont = m_TextState.GetFont();
322     FX_BOOL bVertWriting = FALSE;
323     CPDF_CIDFont* pCIDFont = pFont->GetCIDFont();
324     if (pCIDFont) {
325         bVertWriting = pCIDFont->IsVertWriting();
326     }
327     if (!bVertWriting) {
328         return pFont->GetCharWidthF(charcode, 0) * fontsize;
329     } else {
330         FX_WORD CID = pCIDFont->CIDFromCharCode(charcode);
331         return pCIDFont->GetVertWidth(CID) * fontsize;
332     }
333 }
GetSpaceCharWidth() const334 FX_FLOAT CPDF_TextObject::GetSpaceCharWidth() const
335 {
336     CPDF_Font* pFont = m_TextState.GetFont();
337     FX_DWORD charCode = m_TextState.GetFont()->CharCodeFromUnicode(32);
338     if (charCode != (FX_DWORD) - 1) {
339         return GetCharWidth(charCode);
340     }
341     FX_FLOAT fontSize = m_TextState.GetFontSize() / 4000.0f;
342     FX_BOOL bVertWriting = FALSE;
343     CPDF_CIDFont* pCIDFont = pFont->GetCIDFont();
344     if (pCIDFont) {
345         bVertWriting = pCIDFont->IsVertWriting();
346     }
347     FX_RECT fontRect;
348     pFont->GetFontBBox(fontRect);
349     fontSize *= bVertWriting ? (FX_FLOAT)fontRect.Height() : (FX_FLOAT)fontRect.Width();
350     return fontSize;
351 }
GetCharRect(int index,CFX_FloatRect & rect) const352 void CPDF_TextObject::GetCharRect(int index, CFX_FloatRect& rect) const
353 {
354     CPDF_Font* pFont = m_TextState.GetFont();
355     FX_BOOL bVertWriting = FALSE;
356     CPDF_CIDFont* pCIDFont = pFont->GetCIDFont();
357     if (pCIDFont) {
358         bVertWriting = pCIDFont->IsVertWriting();
359     }
360     FX_FLOAT fontsize = m_TextState.GetFontSize() / 1000;
361     int count = 0;
362     for (int i = 0; i < m_nChars; i ++) {
363         FX_DWORD charcode = m_nChars == 1 ? (FX_DWORD)(FX_UINTPTR)m_pCharCodes : m_pCharCodes[i];
364         if (charcode == (FX_DWORD) - 1) {
365             continue;
366         }
367         if( count != index) {
368             count++;
369             continue;
370         }
371         FX_FLOAT curpos = i > 0 ? m_pCharPos[i - 1] : 0;
372         FX_RECT char_rect;
373         pFont->GetCharBBox(charcode, char_rect, 0);
374         if (!bVertWriting) {
375             rect.left = curpos + char_rect.left * fontsize;
376             rect.right = curpos + char_rect.right * fontsize;
377             rect.top = char_rect.top * fontsize;
378             rect.bottom = char_rect.bottom * fontsize;
379         } else {
380             FX_WORD CID = pCIDFont->CIDFromCharCode(charcode);
381             short vx, vy;
382             pCIDFont->GetVertOrigin(CID, vx, vy);
383             char_rect.left -= vx;
384             char_rect.right -= vx;
385             char_rect.top -= vy;
386             char_rect.bottom -= vy;
387             rect.left = char_rect.left * fontsize;
388             rect.right = char_rect.right * fontsize;
389             rect.top = curpos + char_rect.top * fontsize;
390             rect.bottom = curpos + char_rect.bottom * fontsize;
391         }
392         return;
393     }
394 }
CalcPositionData(FX_FLOAT * pTextAdvanceX,FX_FLOAT * pTextAdvanceY,FX_FLOAT horz_scale,int level)395 void CPDF_TextObject::CalcPositionData(FX_FLOAT* pTextAdvanceX, FX_FLOAT* pTextAdvanceY, FX_FLOAT horz_scale, int level)
396 {
397     FX_FLOAT curpos = 0;
398     FX_FLOAT min_x = 10000 * 1.0f, max_x = -10000 * 1.0f, min_y = 10000 * 1.0f, max_y = -10000 * 1.0f;
399     CPDF_Font* pFont = m_TextState.GetFont();
400     FX_BOOL bVertWriting = FALSE;
401     CPDF_CIDFont* pCIDFont = pFont->GetCIDFont();
402     if (pCIDFont) {
403         bVertWriting = pCIDFont->IsVertWriting();
404     }
405     FX_FLOAT fontsize = m_TextState.GetFontSize();
406     for (int i = 0; i < m_nChars; i ++) {
407         FX_DWORD charcode = m_nChars == 1 ? (FX_DWORD)(FX_UINTPTR)m_pCharCodes : m_pCharCodes[i];
408         if (charcode == (FX_DWORD) - 1) {
409             curpos -= FXSYS_Mul(m_pCharPos[i - 1], fontsize) / 1000;
410             continue;
411         }
412         if (i) {
413             m_pCharPos[i - 1] = curpos;
414         }
415         FX_RECT char_rect;
416         pFont->GetCharBBox(charcode, char_rect, level);
417         FX_FLOAT charwidth;
418         if (!bVertWriting) {
419             if (min_y > char_rect.top) {
420                 min_y = (FX_FLOAT)char_rect.top;
421             }
422             if (max_y < char_rect.top) {
423                 max_y = (FX_FLOAT)char_rect.top;
424             }
425             if (min_y > char_rect.bottom) {
426                 min_y = (FX_FLOAT)char_rect.bottom;
427             }
428             if (max_y < char_rect.bottom) {
429                 max_y = (FX_FLOAT)char_rect.bottom;
430             }
431             FX_FLOAT char_left = curpos + char_rect.left * fontsize / 1000;
432             FX_FLOAT char_right = curpos + char_rect.right * fontsize / 1000;
433             if (min_x > char_left) {
434                 min_x = char_left;
435             }
436             if (max_x < char_left) {
437                 max_x = char_left;
438             }
439             if (min_x > char_right) {
440                 min_x = char_right;
441             }
442             if (max_x < char_right) {
443                 max_x = char_right;
444             }
445             charwidth = pFont->GetCharWidthF(charcode, level) * fontsize / 1000;
446         } else {
447             FX_WORD CID = pCIDFont->CIDFromCharCode(charcode);
448             short vx, vy;
449             pCIDFont->GetVertOrigin(CID, vx, vy);
450             char_rect.left -= vx;
451             char_rect.right -= vx;
452             char_rect.top -= vy;
453             char_rect.bottom -= vy;
454             if (min_x > char_rect.left) {
455                 min_x = (FX_FLOAT)char_rect.left;
456             }
457             if (max_x < char_rect.left) {
458                 max_x = (FX_FLOAT)char_rect.left;
459             }
460             if (min_x > char_rect.right) {
461                 min_x = (FX_FLOAT)char_rect.right;
462             }
463             if (max_x < char_rect.right) {
464                 max_x = (FX_FLOAT)char_rect.right;
465             }
466             FX_FLOAT char_top = curpos + char_rect.top * fontsize / 1000;
467             FX_FLOAT char_bottom = curpos + char_rect.bottom * fontsize / 1000;
468             if (min_y > char_top) {
469                 min_y = char_top;
470             }
471             if (max_y < char_top) {
472                 max_y = char_top;
473             }
474             if (min_y > char_bottom) {
475                 min_y = char_bottom;
476             }
477             if (max_y < char_bottom) {
478                 max_y = char_bottom;
479             }
480             charwidth = pCIDFont->GetVertWidth(CID) * fontsize / 1000;
481         }
482         curpos += charwidth;
483         if (charcode == ' ' && (pCIDFont == NULL || pCIDFont->GetCharSize(32) == 1)) {
484             curpos += m_TextState.GetObject()->m_WordSpace;
485         }
486         curpos += m_TextState.GetObject()->m_CharSpace;
487     }
488     if (bVertWriting) {
489         if (pTextAdvanceX) {
490             *pTextAdvanceX = 0;
491         }
492         if (pTextAdvanceY) {
493             *pTextAdvanceY = curpos;
494         }
495         min_x = min_x * fontsize / 1000;
496         max_x = max_x * fontsize / 1000;
497     } else {
498         if (pTextAdvanceX) {
499             *pTextAdvanceX = FXSYS_Mul(curpos, horz_scale);
500         }
501         if (pTextAdvanceY) {
502             *pTextAdvanceY = 0;
503         }
504         min_y = min_y * fontsize / 1000;
505         max_y = max_y * fontsize / 1000;
506     }
507     CFX_AffineMatrix matrix;
508     GetTextMatrix(&matrix);
509     m_Left = min_x;
510     m_Right = max_x;
511     m_Bottom = min_y;
512     m_Top = max_y;
513     matrix.TransformRect(m_Left, m_Right, m_Top, m_Bottom);
514     int textmode = m_TextState.GetObject()->m_TextMode;
515     if (textmode == 1 || textmode == 2 || textmode == 5 || textmode == 6) {
516         FX_FLOAT half_width = m_GraphState.GetObject()->m_LineWidth / 2;
517         m_Left -= half_width;
518         m_Right += half_width;
519         m_Top += half_width;
520         m_Bottom -= half_width;
521     }
522 }
CalcCharPos(FX_FLOAT * pPosArray) const523 void CPDF_TextObject::CalcCharPos(FX_FLOAT* pPosArray) const
524 {
525     CPDF_Font* pFont = m_TextState.GetFont();
526     FX_BOOL bVertWriting = FALSE;
527     CPDF_CIDFont* pCIDFont = pFont->GetCIDFont();
528     if (pCIDFont) {
529         bVertWriting = pCIDFont->IsVertWriting();
530     }
531     FX_FLOAT fontsize = m_TextState.GetFontSize();
532     int index = 0;
533     for (int i = 0; i < m_nChars; i ++) {
534         FX_DWORD charcode = m_nChars == 1 ? (FX_DWORD)(FX_UINTPTR)m_pCharCodes : m_pCharCodes[i];
535         if (charcode == (FX_DWORD) - 1) {
536             continue;
537         }
538         pPosArray[index++] = i ? m_pCharPos[i - 1] : 0;
539         FX_FLOAT charwidth;
540         if (bVertWriting) {
541             FX_WORD CID = pCIDFont->CIDFromCharCode(charcode);
542             charwidth = pCIDFont->GetVertWidth(CID) * fontsize / 1000;
543         } else {
544             charwidth = pFont->GetCharWidthF(charcode) * fontsize / 1000;
545         }
546         pPosArray[index] = pPosArray[index - 1] + charwidth;
547         index++;
548     }
549 }
Transform(const CFX_AffineMatrix & matrix)550 void CPDF_TextObject::Transform(const CFX_AffineMatrix& matrix)
551 {
552     m_TextState.GetModify();
553     CFX_AffineMatrix text_matrix;
554     GetTextMatrix(&text_matrix);
555     text_matrix.Concat(matrix);
556     FX_FLOAT* pTextMatrix = m_TextState.GetMatrix();
557     pTextMatrix[0] = text_matrix.GetA();
558     pTextMatrix[1] = text_matrix.GetC();
559     pTextMatrix[2] = text_matrix.GetB();
560     pTextMatrix[3] = text_matrix.GetD();
561     m_PosX = text_matrix.GetE();
562     m_PosY = text_matrix.GetF();
563     CalcPositionData(NULL, NULL, 0);
564 }
SetPosition(FX_FLOAT x,FX_FLOAT y)565 void CPDF_TextObject::SetPosition(FX_FLOAT x, FX_FLOAT y)
566 {
567     FX_FLOAT dx = x - m_PosX;
568     FX_FLOAT dy = y - m_PosY;
569     m_PosX = x;
570     m_PosY = y;
571     m_Left += dx;
572     m_Right += dx;
573     m_Top += dy;
574     m_Bottom += dy;
575 }
SetData(int nChars,FX_DWORD * pCharCodes,FX_FLOAT * pCharPos,FX_FLOAT x,FX_FLOAT y)576 void CPDF_TextObject::SetData(int nChars, FX_DWORD* pCharCodes, FX_FLOAT* pCharPos, FX_FLOAT x, FX_FLOAT y)
577 {
578     ASSERT(m_nChars == 0);
579     m_nChars = nChars;
580     m_PosX = x;
581     m_PosY = y;
582     if (nChars == 0) {
583         return;
584     }
585     if (nChars == 1) {
586         m_pCharCodes = (FX_DWORD*)(FX_UINTPTR) * pCharCodes;
587     } else {
588         m_pCharCodes = FX_Alloc(FX_DWORD, nChars);
589         FXSYS_memcpy32(m_pCharCodes, pCharCodes, sizeof(FX_DWORD)*nChars);
590         m_pCharPos = FX_Alloc(FX_FLOAT, nChars - 1);
591         FXSYS_memcpy32(m_pCharPos, pCharPos, sizeof(FX_FLOAT) * (nChars - 1));
592     }
593     RecalcPositionData();
594 }
SetTextState(CPDF_TextState TextState)595 void CPDF_TextObject::SetTextState(CPDF_TextState TextState)
596 {
597     m_TextState = TextState;
598     CalcPositionData(NULL, NULL, 0);
599 }
CPDF_ShadingObject()600 CPDF_ShadingObject::CPDF_ShadingObject()
601 {
602     m_pShading = NULL;
603     m_Type = PDFPAGE_SHADING;
604 }
~CPDF_ShadingObject()605 CPDF_ShadingObject::~CPDF_ShadingObject()
606 {
607 }
CopyData(const CPDF_PageObject * pSrc)608 void CPDF_ShadingObject::CopyData(const CPDF_PageObject* pSrc)
609 {
610     CPDF_ShadingObject* pSrcObj = (CPDF_ShadingObject*)pSrc;
611     m_pShading = pSrcObj->m_pShading;
612     if (m_pShading && m_pShading->m_pDocument) {
613         CPDF_DocPageData* pDocPageData = m_pShading->m_pDocument->GetPageData();
614         m_pShading = (CPDF_ShadingPattern*)pDocPageData->GetPattern(m_pShading->m_pShadingObj, m_pShading->m_bShadingObj, &m_pShading->m_ParentMatrix);
615     }
616     m_Matrix = pSrcObj->m_Matrix;
617 }
Transform(const CFX_AffineMatrix & matrix)618 void CPDF_ShadingObject::Transform(const CFX_AffineMatrix& matrix)
619 {
620     if (!m_ClipPath.IsNull()) {
621         m_ClipPath.GetModify();
622         m_ClipPath.Transform(matrix);
623     }
624     m_Matrix.Concat(matrix);
625     if (!m_ClipPath.IsNull()) {
626         CalcBoundingBox();
627     } else {
628         matrix.TransformRect(m_Left, m_Right, m_Top, m_Bottom);
629     }
630 }
CalcBoundingBox()631 void CPDF_ShadingObject::CalcBoundingBox()
632 {
633     if (m_ClipPath.IsNull()) {
634         return;
635     }
636     CFX_FloatRect rect = m_ClipPath.GetClipBox();
637     m_Left = rect.left;
638     m_Bottom = rect.bottom;
639     m_Right = rect.right;
640     m_Top = rect.top;
641 }
~CPDF_FormObject()642 CPDF_FormObject::~CPDF_FormObject()
643 {
644     if (m_pForm) {
645         delete m_pForm;
646     }
647 }
Transform(const CFX_AffineMatrix & matrix)648 void CPDF_FormObject::Transform(const CFX_AffineMatrix& matrix)
649 {
650     m_FormMatrix.Concat(matrix);
651     CalcBoundingBox();
652 }
CopyData(const CPDF_PageObject * pSrc)653 void CPDF_FormObject::CopyData(const CPDF_PageObject* pSrc)
654 {
655     const CPDF_FormObject* pSrcObj = (const CPDF_FormObject*)pSrc;
656     if (m_pForm) {
657         delete m_pForm;
658     }
659     m_pForm = pSrcObj->m_pForm->Clone();
660     m_FormMatrix = pSrcObj->m_FormMatrix;
661 }
CalcBoundingBox()662 void CPDF_FormObject::CalcBoundingBox()
663 {
664     CFX_FloatRect form_rect = m_pForm->CalcBoundingBox();
665     form_rect.Transform(&m_FormMatrix);
666     m_Left = form_rect.left;
667     m_Bottom = form_rect.bottom;
668     m_Right = form_rect.right;
669     m_Top = form_rect.top;
670 }
CPDF_PageObjects(FX_BOOL bReleaseMembers)671 CPDF_PageObjects::CPDF_PageObjects(FX_BOOL bReleaseMembers) : m_ObjectList(128)
672 {
673     m_bBackgroundAlphaNeeded = FALSE;
674     m_bReleaseMembers = bReleaseMembers;
675     m_ParseState = PDF_CONTENT_NOT_PARSED;
676     m_pParser = NULL;
677     m_pFormStream = NULL;
678     m_pResources = NULL;
679 }
~CPDF_PageObjects()680 CPDF_PageObjects::~CPDF_PageObjects()
681 {
682     if (m_pParser) {
683         delete m_pParser;
684     }
685     if (!m_bReleaseMembers) {
686         return;
687     }
688     FX_POSITION pos = m_ObjectList.GetHeadPosition();
689     while (pos) {
690         delete (CPDF_PageObject*)m_ObjectList.GetNext(pos);
691     }
692 }
ContinueParse(IFX_Pause * pPause)693 void CPDF_PageObjects::ContinueParse(IFX_Pause* pPause)
694 {
695     if (m_pParser == NULL) {
696         return;
697     }
698     m_pParser->Continue(pPause);
699     if (m_pParser->GetStatus() == CPDF_ContentParser::Done) {
700         m_ParseState = PDF_CONTENT_PARSED;
701         delete m_pParser;
702         m_pParser = NULL;
703     }
704 }
EstimateParseProgress() const705 int CPDF_PageObjects::EstimateParseProgress() const
706 {
707     if (m_pParser == NULL) {
708         return m_ParseState == PDF_CONTENT_PARSED ? 100 : 0;
709     }
710     return m_pParser->EstimateProgress();
711 }
InsertObject(FX_POSITION posInsertAfter,CPDF_PageObject * pNewObject)712 FX_POSITION CPDF_PageObjects::InsertObject(FX_POSITION posInsertAfter, CPDF_PageObject* pNewObject)
713 {
714     if (posInsertAfter == NULL) {
715         return m_ObjectList.AddHead(pNewObject);
716     } else {
717         return m_ObjectList.InsertAfter(posInsertAfter, pNewObject);
718     }
719 }
GetObjectIndex(CPDF_PageObject * pObj) const720 int CPDF_PageObjects::GetObjectIndex(CPDF_PageObject* pObj) const
721 {
722     int index = 0;
723     FX_POSITION pos = m_ObjectList.GetHeadPosition();
724     while (pos) {
725         CPDF_PageObject* pThisObj = (CPDF_PageObject*)m_ObjectList.GetNext(pos);
726         if (pThisObj == pObj) {
727             return index;
728         }
729         index ++;
730     }
731     return -1;
732 }
GetObjectByIndex(int index) const733 CPDF_PageObject* CPDF_PageObjects::GetObjectByIndex(int index) const
734 {
735     FX_POSITION pos = m_ObjectList.FindIndex(index);
736     if (pos == NULL) {
737         return NULL;
738     }
739     return (CPDF_PageObject*)m_ObjectList.GetAt(pos);
740 }
Transform(const CFX_AffineMatrix & matrix)741 void CPDF_PageObjects::Transform(const CFX_AffineMatrix& matrix)
742 {
743     FX_POSITION pos = m_ObjectList.GetHeadPosition();
744     while (pos) {
745         CPDF_PageObject* pObj = (CPDF_PageObject*)m_ObjectList.GetNext(pos);
746         pObj->Transform(matrix);
747     }
748 }
CalcBoundingBox() const749 CFX_FloatRect CPDF_PageObjects::CalcBoundingBox() const
750 {
751     if (m_ObjectList.GetCount() == 0) {
752         return CFX_FloatRect(0, 0, 0, 0);
753     }
754     FX_FLOAT left, right, top, bottom;
755     left = bottom = 1000000 * 1.0f;
756     right = top = -1000000 * 1.0f;
757     FX_POSITION pos = m_ObjectList.GetHeadPosition();
758     while (pos) {
759         CPDF_PageObject* pObj = (CPDF_PageObject*)m_ObjectList.GetNext(pos);
760         if (left > pObj->m_Left) {
761             left = pObj->m_Left;
762         }
763         if (right < pObj->m_Right) {
764             right = pObj->m_Right;
765         }
766         if (top < pObj->m_Top) {
767             top = pObj->m_Top;
768         }
769         if (bottom > pObj->m_Bottom) {
770             bottom = pObj->m_Bottom;
771         }
772     }
773     return CFX_FloatRect(left, bottom, right, top);
774 }
LoadTransInfo()775 void CPDF_PageObjects::LoadTransInfo()
776 {
777     if (m_pFormDict == NULL) {
778         return;
779     }
780     CPDF_Dictionary* pGroup = m_pFormDict->GetDict(FX_BSTRC("Group"));
781     if (pGroup == NULL) {
782         return;
783     }
784     if (pGroup->GetString(FX_BSTRC("S")) != FX_BSTRC("Transparency")) {
785         return;
786     }
787     m_Transparency |= PDFTRANS_GROUP;
788     if (pGroup->GetInteger(FX_BSTRC("I"))) {
789         m_Transparency |= PDFTRANS_ISOLATED;
790     }
791     if (pGroup->GetInteger(FX_BSTRC("K"))) {
792         m_Transparency |= PDFTRANS_KNOCKOUT;
793     }
794 }
ClearCacheObjects()795 void CPDF_PageObjects::ClearCacheObjects()
796 {
797     m_ParseState = PDF_CONTENT_NOT_PARSED;
798     if (m_pParser) {
799         delete m_pParser;
800     }
801     m_pParser = NULL;
802     if (m_bReleaseMembers) {
803         FX_POSITION pos = m_ObjectList.GetHeadPosition();
804         while (pos) {
805             delete (CPDF_PageObject*)m_ObjectList.GetNext(pos);
806         }
807     }
808     m_ObjectList.RemoveAll();
809 }
CPDF_Page()810 CPDF_Page::CPDF_Page()
811 {
812     m_pPageRender = NULL;
813 }
Load(CPDF_Document * pDocument,CPDF_Dictionary * pPageDict,FX_BOOL bPageCache)814 void CPDF_Page::Load(CPDF_Document* pDocument, CPDF_Dictionary* pPageDict, FX_BOOL bPageCache)
815 {
816     m_pDocument = (CPDF_Document*)pDocument;
817     m_pFormDict = pPageDict;
818     if (bPageCache) {
819         m_pPageRender = CPDF_ModuleMgr::Get()->GetRenderModule()->CreatePageCache(this);
820     }
821     if (pPageDict == NULL) {
822         m_PageWidth = m_PageHeight = 100 * 1.0f;
823         m_pPageResources = m_pResources = NULL;
824         return;
825     }
826     CPDF_Object* pageAttr = GetPageAttr(FX_BSTRC("Resources"));
827     m_pResources = pageAttr ? pageAttr->GetDict() : NULL;
828     m_pPageResources = m_pResources;
829     CPDF_Object* pRotate = GetPageAttr(FX_BSTRC("Rotate"));
830     int rotate = 0;
831     if (pRotate) {
832         rotate = pRotate->GetInteger() / 90 % 4;
833     }
834     if (rotate < 0) {
835         rotate += 4;
836     }
837     CPDF_Array* pMediaBox, *pCropBox;
838     pMediaBox = (CPDF_Array*)GetPageAttr(FX_BSTRC("MediaBox"));
839     CFX_FloatRect mediabox;
840     if (pMediaBox) {
841         mediabox = pMediaBox->GetRect();
842         mediabox.Normalize();
843     }
844     if (mediabox.IsEmpty()) {
845         mediabox = CFX_FloatRect(0, 0, 612, 792);
846     }
847     pCropBox = (CPDF_Array*)GetPageAttr(FX_BSTRC("CropBox"));
848     if (pCropBox) {
849         m_BBox = pCropBox->GetRect();
850         m_BBox.Normalize();
851     }
852     if (m_BBox.IsEmpty()) {
853         m_BBox = mediabox;
854     } else {
855         m_BBox.Intersect(mediabox);
856     }
857     if (rotate % 2) {
858         m_PageHeight = m_BBox.right - m_BBox.left;
859         m_PageWidth = m_BBox.top - m_BBox.bottom;
860     } else {
861         m_PageWidth = m_BBox.right - m_BBox.left;
862         m_PageHeight = m_BBox.top - m_BBox.bottom;
863     }
864     switch (rotate) {
865         case 0:
866             m_PageMatrix.Set(1.0f, 0, 0, 1.0f, -m_BBox.left, -m_BBox.bottom);
867             break;
868         case 1:
869             m_PageMatrix.Set(0, -1.0f, 1.0f, 0, -m_BBox.bottom, m_BBox.right);
870             break;
871         case 2:
872             m_PageMatrix.Set(-1.0f, 0, 0, -1.0f, m_BBox.right, m_BBox.top);
873             break;
874         case 3:
875             m_PageMatrix.Set(0, 1.0f, -1.0f, 0, m_BBox.top, -m_BBox.left);
876             break;
877     }
878     m_Transparency = PDFTRANS_ISOLATED;
879     LoadTransInfo();
880 }
StartParse(CPDF_ParseOptions * pOptions,FX_BOOL bReParse)881 void CPDF_Page::StartParse(CPDF_ParseOptions* pOptions, FX_BOOL bReParse)
882 {
883     if (bReParse) {
884         ClearCacheObjects();
885     }
886     if (m_ParseState == PDF_CONTENT_PARSED || m_ParseState == PDF_CONTENT_PARSING) {
887         return;
888     }
889     m_pParser = new CPDF_ContentParser;
890     m_pParser->Start(this, pOptions);
891     m_ParseState = PDF_CONTENT_PARSING;
892 }
ParseContent(CPDF_ParseOptions * pOptions,FX_BOOL bReParse)893 void CPDF_Page::ParseContent(CPDF_ParseOptions* pOptions, FX_BOOL bReParse)
894 {
895     StartParse(pOptions, bReParse);
896     ContinueParse(NULL);
897 }
~CPDF_Page()898 CPDF_Page::~CPDF_Page()
899 {
900     if (m_pPageRender) {
901         CPDF_RenderModuleDef* pModule = CPDF_ModuleMgr::Get()->GetRenderModule();
902         pModule->DestroyPageCache(m_pPageRender);
903     }
904 }
FPDFAPI_GetPageAttr(CPDF_Dictionary * pPageDict,FX_BSTR name)905 CPDF_Object* FPDFAPI_GetPageAttr(CPDF_Dictionary* pPageDict, FX_BSTR name)
906 {
907     int level = 0;
908     while (1) {
909         CPDF_Object* pObj = pPageDict->GetElementValue(name);
910         if (pObj) {
911             return pObj;
912         }
913         CPDF_Dictionary* pParent = pPageDict->GetDict(FX_BSTRC("Parent"));
914         if (!pParent || pParent == pPageDict) {
915             return NULL;
916         }
917         pPageDict = pParent;
918         level ++;
919         if (level == 1000) {
920             return NULL;
921         }
922     }
923 }
GetPageAttr(FX_BSTR name) const924 CPDF_Object* CPDF_Page::GetPageAttr(FX_BSTR name) const
925 {
926     return FPDFAPI_GetPageAttr(m_pFormDict, name);
927 }
CPDF_Form(CPDF_Document * pDoc,CPDF_Dictionary * pPageResources,CPDF_Stream * pFormStream,CPDF_Dictionary * pParentResources)928 CPDF_Form::CPDF_Form(CPDF_Document* pDoc, CPDF_Dictionary* pPageResources, CPDF_Stream* pFormStream, CPDF_Dictionary* pParentResources)
929 {
930     m_pDocument = pDoc;
931     m_pFormStream = pFormStream;
932     m_pFormDict = pFormStream ? pFormStream->GetDict() : NULL;
933     m_pResources = m_pFormDict->GetDict(FX_BSTRC("Resources"));
934     m_pPageResources = pPageResources;
935     if (m_pResources == NULL) {
936         m_pResources = pParentResources;
937     }
938     if (m_pResources == NULL) {
939         m_pResources = pPageResources;
940     }
941     m_Transparency = 0;
942     LoadTransInfo();
943 }
~CPDF_Form()944 CPDF_Form::~CPDF_Form()
945 {
946 }
StartParse(CPDF_AllStates * pGraphicStates,CFX_AffineMatrix * pParentMatrix,CPDF_Type3Char * pType3Char,CPDF_ParseOptions * pOptions,int level)947 void CPDF_Form::StartParse(CPDF_AllStates* pGraphicStates, CFX_AffineMatrix* pParentMatrix,
948                            CPDF_Type3Char* pType3Char, CPDF_ParseOptions* pOptions, int level)
949 {
950     if (m_ParseState == PDF_CONTENT_PARSED || m_ParseState == PDF_CONTENT_PARSING) {
951         return;
952     }
953     m_pParser = new CPDF_ContentParser;
954     m_pParser->Start(this, pGraphicStates, pParentMatrix, pType3Char, pOptions, level);
955     m_ParseState = PDF_CONTENT_PARSING;
956 }
ParseContent(CPDF_AllStates * pGraphicStates,CFX_AffineMatrix * pParentMatrix,CPDF_Type3Char * pType3Char,CPDF_ParseOptions * pOptions,int level)957 void CPDF_Form::ParseContent(CPDF_AllStates* pGraphicStates, CFX_AffineMatrix* pParentMatrix,
958                              CPDF_Type3Char* pType3Char, CPDF_ParseOptions* pOptions, int level)
959 {
960     StartParse(pGraphicStates, pParentMatrix, pType3Char, pOptions, level);
961     ContinueParse(NULL);
962 }
Clone() const963 CPDF_Form* CPDF_Form::Clone() const
964 {
965     CPDF_Form* pClone = new CPDF_Form(m_pDocument, m_pPageResources, m_pFormStream, m_pResources);
966     FX_POSITION pos = m_ObjectList.GetHeadPosition();
967     while (pos) {
968         CPDF_PageObject* pObj = (CPDF_PageObject*)m_ObjectList.GetNext(pos);
969         pClone->m_ObjectList.AddTail(pObj->Clone());
970     }
971     return pClone;
972 }
GetDisplayMatrix(CFX_AffineMatrix & matrix,int xPos,int yPos,int xSize,int ySize,int iRotate) const973 void CPDF_Page::GetDisplayMatrix(CFX_AffineMatrix& matrix, int xPos, int yPos,
974                                  int xSize, int ySize, int iRotate) const
975 {
976     if (m_PageWidth == 0 || m_PageHeight == 0) {
977         return;
978     }
979     CFX_AffineMatrix display_matrix;
980     int x0, y0, x1, y1, x2, y2;
981     iRotate %= 4;
982     switch (iRotate) {
983         case 0:
984             x0 = xPos;
985             y0 = yPos + ySize;
986             x1 = xPos;
987             y1 = yPos;
988             x2 = xPos + xSize;
989             y2 = yPos + ySize;
990             break;
991         case 1:
992             x0 = xPos;
993             y0 = yPos;
994             x1 = xPos + xSize;
995             y1 = yPos;
996             x2 = xPos;
997             y2 = yPos + ySize;
998             break;
999         case 2:
1000             x0 = xPos + xSize;
1001             y0 = yPos;
1002             x1 = xPos + xSize;
1003             y1 = yPos + ySize;
1004             x2 = xPos;
1005             y2 = yPos;
1006             break;
1007         case 3:
1008             x0 = xPos + xSize;
1009             y0 = yPos + ySize;
1010             x1 = xPos;
1011             y1 = yPos + ySize;
1012             x2 = xPos + xSize;
1013             y2 = yPos;
1014             break;
1015     }
1016     display_matrix.Set(FXSYS_Div((FX_FLOAT)(x2 - x0), m_PageWidth),
1017                        FXSYS_Div((FX_FLOAT)(y2 - y0), m_PageWidth),
1018                        FXSYS_Div((FX_FLOAT)(x1 - x0), m_PageHeight),
1019                        FXSYS_Div((FX_FLOAT)(y1 - y0), m_PageHeight),
1020                        (FX_FLOAT)x0, (FX_FLOAT)y0);
1021     matrix = m_PageMatrix;
1022     matrix.Concat(display_matrix);
1023 }
CPDF_ParseOptions()1024 CPDF_ParseOptions::CPDF_ParseOptions()
1025 {
1026     m_bTextOnly = FALSE;
1027     m_bMarkedContent = TRUE;
1028     m_bSeparateForm = TRUE;
1029     m_bDecodeInlineImage = FALSE;
1030 }
1031