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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/reflow/reflowengine.h"
8 #include "reflowedpage.h"
CPDF_ProgressiveReflowPageParser()9 CPDF_ProgressiveReflowPageParser::CPDF_ProgressiveReflowPageParser()
10 {
11     m_nObjProcessed = 0;
12     m_pReflowEngine = NULL;
13     m_pProvider = NULL;
14 }
~CPDF_ProgressiveReflowPageParser()15 CPDF_ProgressiveReflowPageParser::~CPDF_ProgressiveReflowPageParser()
16 {
17     if(m_pProvider) {
18         delete m_pProvider;
19     }
20     m_pProvider = NULL;
21     if(m_pReflowEngine) {
22         delete m_pReflowEngine;
23     }
24     m_pReflowEngine = NULL;
25 }
Init()26 void CPDF_ProgressiveReflowPageParser::Init()
27 {
28     m_Status = Ready;
29 }
CPDF_ReflowedPage(CFX_GrowOnlyPool * pMemoryPool)30 CPDF_ReflowedPage::CPDF_ReflowedPage(CFX_GrowOnlyPool*	pMemoryPool)
31 {
32     m_PageWidth = 0;
33     m_PageHeight = 0;
34     m_bWaiting = TRUE;
35     if(pMemoryPool) {
36         m_pMemoryPool = pMemoryPool;
37         m_bCreateMemoryPool = FALSE;
38     } else {
39         m_pMemoryPool = FX_NEW CFX_GrowOnlyPool;
40         m_bCreateMemoryPool = TRUE;
41     }
42     m_pCharState = FX_NEW CRF_CharStateArray(10);
43     m_pReflowed = FX_NEW CRF_DataPtrArray(500);
44     m_pPageInfos = NULL;
45 }
~CPDF_ReflowedPage()46 CPDF_ReflowedPage::~CPDF_ReflowedPage()
47 {
48     if (m_pReflowed) {
49         for(int i = 0; i < m_pReflowed->GetSize(); i++) {
50             CRF_Data* pData = (*m_pReflowed)[i];
51             if(pData->m_Type == CRF_Data::Image) {
52                 delete ((CRF_ImageData*)pData)->m_pBitmap;
53             }
54         }
55         m_pReflowed->RemoveAll();
56         delete m_pReflowed;
57     }
58     m_pReflowed = NULL;
59     if (m_pCharState) {
60         m_pCharState->RemoveAll();
61         delete m_pCharState;
62     }
63     m_pCharState = NULL;
64     if(m_bCreateMemoryPool && m_pMemoryPool) {
65         m_pMemoryPool->FreeAll();
66     }
67     if (m_pMemoryPool) {
68         delete m_pMemoryPool;
69     }
70     m_pMemoryPool = NULL;
71     m_pPDFPage = NULL;
72     if (m_pPageInfos) {
73         ReleasePageObjsMemberShip();
74     }
75 }
RetainPageObjsMemberShip()76 FX_BOOL CPDF_ReflowedPage::RetainPageObjsMemberShip()
77 {
78     if (NULL == m_pPDFPage) {
79         return FALSE;
80     }
81     if (NULL == m_pPageInfos) {
82         m_pPageInfos = FX_NEW CFX_MapPtrToPtr();
83     } else {
84         return TRUE;
85     }
86     FX_POSITION	pos = m_pPDFPage->GetFirstObjectPosition();
87     if (!pos)	{
88         return FALSE;
89     }
90     CPDF_PageObject* pPageObj = NULL;
91     while (pos) {
92         pPageObj = m_pPDFPage->GetNextObject(pos);
93         MarkPageObjMemberShip(pPageObj, NULL);
94         pPageObj = NULL;
95     }
96     return TRUE;
97 }
MarkPageObjMemberShip(CPDF_PageObject * pObj,CRF_PageInfo * pParent)98 void CPDF_ReflowedPage::MarkPageObjMemberShip(CPDF_PageObject* pObj, CRF_PageInfo* pParent)
99 {
100     if (NULL == m_pPageInfos) {
101         return;
102     }
103     CRF_PageInfo* pPageInfo = FX_NEW CRF_PageInfo(pObj, pParent);
104     if (NULL == pPageInfo) {
105         return;
106     }
107     m_pPageInfos->SetAt(pObj, pPageInfo);
108     if (PDFPAGE_FORM != pObj->m_Type) {
109         return;
110     }
111     CPDF_FormObject* pFormObj = (CPDF_FormObject*)pObj;
112     FX_POSITION	pos;
113     pos = pFormObj->m_pForm->GetFirstObjectPosition();
114     if (!pos)	{
115         return;
116     }
117     CPDF_PageObject* pPageObj = NULL;
118     while (pos) {
119         pPageObj = pFormObj->m_pForm->GetNextObject(pos);
120         MarkPageObjMemberShip(pPageObj, pPageInfo);
121         pPageObj = NULL;
122     }
123 }
ReleasePageObjsMemberShip()124 void CPDF_ReflowedPage::ReleasePageObjsMemberShip()
125 {
126     if (NULL == m_pPageInfos) {
127         return;
128     }
129     CPDF_PageObject* pPageObj = NULL;
130     CRF_PageInfo* pPageInfo = NULL;
131     FX_POSITION pos = m_pPageInfos->GetStartPosition();
132     while (pos) {
133         m_pPageInfos->GetNextAssoc(pos, (void*&)pPageObj, (void*&)pPageInfo);
134         delete pPageInfo;
135     }
136     m_pPageInfos->RemoveAll();
137     delete m_pPageInfos;
138     m_pPageInfos = NULL;
139 }
GetFormResDict(CPDF_PageObject * pObj)140 CPDF_Dictionary* CPDF_ReflowedPage::GetFormResDict(CPDF_PageObject* pObj)
141 {
142     if (NULL == m_pPageInfos) {
143         return NULL;
144     }
145     if (FALSE == RetainPageObjsMemberShip()) {
146         return NULL;
147     }
148     CRF_PageInfo* pPageInfo = (CRF_PageInfo*)m_pPageInfos->GetValueAt(pObj);
149     if (NULL == pPageInfo) {
150         return NULL;
151     }
152     return pPageInfo->GetFormDict();
153 }
GetDisplayMatrix(CFX_AffineMatrix & matrix,FX_INT32 xPos,FX_INT32 yPos,FX_INT32 xSize,FX_INT32 ySize,FX_INT32 iRotate,const CFX_AffineMatrix * pPageMatrix)154 void CPDF_ReflowedPage::GetDisplayMatrix(CFX_AffineMatrix& matrix, FX_INT32 xPos, FX_INT32 yPos, FX_INT32 xSize, FX_INT32 ySize, FX_INT32 iRotate, const CFX_AffineMatrix* pPageMatrix)
155 {
156     CFX_AffineMatrix display_matrix;
157     if(m_PageHeight == 0) {
158         matrix.Set(1, 0, 0, -1, 0, 0);
159         return;
160     }
161     FX_INT32 x0, y0, x1, y1, x2, y2;
162     iRotate %= 4;
163     switch (iRotate) {
164         case 0:
165             x0 = xPos;
166             y0 = yPos;
167             x1 = xPos;
168             y1 = yPos + ySize;
169             x2 = xPos + xSize;
170             y2 = yPos;
171             break;
172         case 3:
173             x0 = xPos;
174             y0 = ySize + yPos;
175             x1 =  xPos + xSize;
176             y1 = yPos + ySize;
177             x2 = xPos;
178             y2 = yPos;
179             break;
180         case 2:
181             x0 = xSize + xPos;
182             y0 = ySize + yPos;
183             x1 = xSize + xPos ;
184             y1 = yPos;
185             x2 = xPos;
186             y2 =  ySize + yPos;
187             break;
188         case 1:
189             x0 = xPos + xSize;
190             y0 = yPos;
191             x1 = xPos;
192             y1 = yPos;
193             x2 = xPos + xSize;
194             y2 = yPos + ySize;
195             break;
196     }
197     display_matrix.Set(FXSYS_Div((FX_FLOAT)(x2 - x0), m_PageWidth),
198                        FXSYS_Div((FX_FLOAT)(y2 - y0), m_PageWidth),
199                        FXSYS_Div((FX_FLOAT)(x1 - x0), m_PageHeight),
200                        FXSYS_Div((FX_FLOAT)(y1 - y0), m_PageHeight),
201                        (FX_FLOAT)(x0), (FX_FLOAT)(y0));
202     matrix.Set(1.0f, 0.0f, 0.0f, -1.0f, 0.0f, 0.0f);
203     matrix.Concat(display_matrix);
204     return;
205 }
GetPageHeight()206 FX_FLOAT CPDF_ReflowedPage::GetPageHeight()
207 {
208     return m_PageHeight;
209 }
FocusGetData(const CFX_AffineMatrix matrix,FX_INT32 x,FX_INT32 y,CFX_ByteString & str)210 void CPDF_ReflowedPage::FocusGetData(const CFX_AffineMatrix matrix, FX_INT32 x, FX_INT32 y, CFX_ByteString& str)
211 {
212     if (NULL == m_pReflowed) {
213         return;
214     }
215     CFX_AffineMatrix revMatrix;
216     revMatrix.SetReverse(matrix);
217     FX_FLOAT x1, y1;
218     revMatrix.Transform((float)x, (float)y, x1, y1);
219     int count = m_pReflowed->GetSize();
220     FX_FLOAT dx = 1000, dy = 1000;
221     FX_INT32 pos = 0;
222     FX_INT32 i;
223     for(i = 0; i < count; i++) {
224         CRF_Data* pData = (*m_pReflowed)[i];
225         FX_FLOAT tempdy = FXSYS_fabs(pData->m_PosY - y1);
226         if(FXSYS_fabs(tempdy - dy) < 1) {
227             continue;
228         }
229         CFX_FloatRect rect (0, pData->m_PosY + pData->m_Height, this->m_PageWidth, pData->m_PosY);
230         if(rect.Contains(x1, y1)) {
231             pos = i;
232             dx = 0;
233             dy = 0;
234             break;
235         } else if(tempdy < dy) {
236             dy = tempdy;
237             dx = FXSYS_fabs(pData->m_PosX - x1);
238             pos = i;
239         } else if (tempdy == dy) {
240             FX_FLOAT tempdx = FXSYS_fabs(pData->m_PosX - x1);
241             if(tempdx < dx) {
242                 dx = tempdx;
243                 pos = i;
244             }
245         } else if (tempdy > dy) {
246             break;
247         }
248     }
249     if(dx != 0 || dy != 0) {
250         count = count < (pos + 10) ? count : (pos + 10);
251         for(i = 0 > (pos - 10) ? 0 : (pos - 10); i < count; i++) {
252             CRF_Data* pData = (*m_pReflowed)[i];
253             FX_FLOAT tempdy = FXSYS_fabs(pData->m_PosY - y1);
254             if(tempdy < dy) {
255                 dy = tempdy;
256                 dx = FXSYS_fabs(pData->m_PosX - x1);
257                 pos = i;
258             } else if (tempdy == dy) {
259                 FX_FLOAT tempdx = FXSYS_fabs(pData->m_PosX - x1);
260                 if(tempdx < dx) {
261                     dx = tempdx;
262                     pos = i;
263                 }
264             }
265         }
266     }
267     str.Format("%d", pos);
268 }
FocusGetPosition(const CFX_AffineMatrix matrix,CFX_ByteString str,FX_INT32 & x,FX_INT32 & y)269 FX_BOOL CPDF_ReflowedPage::FocusGetPosition(const CFX_AffineMatrix matrix, CFX_ByteString str, FX_INT32& x, FX_INT32& y)
270 {
271     if (NULL == m_pReflowed) {
272         return FALSE;
273     }
274     FX_INT32 pos = FXSYS_atoi(str);
275     if(pos < 0 || pos >= m_pReflowed->GetSize()) {
276         return FALSE;
277     }
278     CRF_Data* pData = (*m_pReflowed)[pos];
279     FX_FLOAT x1, y1;
280     matrix.Transform(pData->m_PosX, pData->m_PosY + pData->m_Height, x1, y1);
281     x = (int)x1;
282     y = (int)y1;
283     return TRUE;
284 }
GetPosition()285 int CPDF_ProgressiveReflowPageParser::GetPosition()
286 {
287     if(!m_pProvider) {
288         return 0;
289     }
290     if(!m_pReflowEngine) {
291         return m_pProvider->GetPosition() / 2;
292     }
293     return m_pProvider->GetPosition() / 2 + m_pReflowEngine->GetPosition() / 2;
294 }
Continue(IFX_Pause * pPause)295 void CPDF_ProgressiveReflowPageParser::Continue(IFX_Pause* pPause)
296 {
297     if (NULL == m_pReflowPage) {
298         return;
299     }
300     if(m_Status != ToBeContinued) {
301         return;
302     }
303     m_pPause = pPause;
304     if(m_pReflowEngine) {
305         if(m_pReflowEngine->Continue() != LayoutToBeContinued) {
306             m_Status = Done;
307         }
308     } else {
309         if(m_pProvider->Continue() == LayoutFinished) {
310             m_pReflowEngine = IPDF_LayoutProcessor::Create_LayoutProcessor_Reflow(m_TopIndent, m_ReflowedWidth, m_fScreenHeight, m_pReflowPage, m_flags, m_ParseStyle.m_LineSpace);
311             CFX_AffineMatrix matrix;
312             m_pPDFPage->GetDisplayMatrix(matrix, 0, 0, (int)(m_pPDFPage->GetPageWidth()), (int)(m_pPDFPage->GetPageHeight()), 0);
313             if(m_pReflowEngine->StartProcess(m_pProvider->GetRoot(), m_pPause, &matrix) != LayoutToBeContinued) {
314                 m_Status = Done;
315             }
316         }
317     }
318     if(m_TopIndent && m_Status == Done) {
319         m_pReflowPage->m_PageHeight -= m_TopIndent;
320     }
321 }
Clear()322 void CPDF_ProgressiveReflowPageParser::Clear()
323 {
324     this->Init();
325     return;
326 }
IsTaggedPage(CPDF_PageObjects * pPage)327 FX_BOOL IPDF_ProgressiveReflowPageParser::IsTaggedPage(CPDF_PageObjects*pPage)
328 {
329     if(!pPage) {
330         return FALSE;
331     }
332     CPDF_StructTree* pPageTree = CPDF_StructTree::LoadPage(pPage->m_pDocument, pPage->m_pFormDict);
333     if(pPageTree) {
334         int count = pPageTree->CountTopElements();
335         if(count) {
336             for(int i = 0; i < count; i++) {
337                 CPDF_StructElement* pElm = pPageTree->GetTopElement(i);
338                 if(pElm) {
339                     delete pPageTree;
340                     pPageTree = NULL;
341                     return TRUE;
342                 }
343             }
344         }
345         delete pPageTree;
346         pPageTree = NULL;
347         return FALSE;
348     }
349     return FALSE;
350 }
Start(IPDF_ReflowedPage * pReflowPage,CPDF_Page * pPage,FX_FLOAT topIndent,FX_FLOAT fWidth,FX_FLOAT fHeight,IFX_Pause * pPause,int flags)351 void CPDF_ProgressiveReflowPageParser::Start(IPDF_ReflowedPage* pReflowPage, CPDF_Page* pPage, FX_FLOAT topIndent, FX_FLOAT fWidth, FX_FLOAT fHeight, IFX_Pause* pPause, int flags)
352 {
353     if (NULL == pReflowPage) {
354         m_Status = Failed;
355         return;
356     }
357     m_flags = flags;
358     m_pReflowPage = (CPDF_ReflowedPage*)pReflowPage;
359     m_pReflowPage->m_pPDFPage = pPage;
360     m_pReflowPage->ReleasePageObjsMemberShip();
361     m_pPDFPage = pPage;
362     m_TopIndent = topIndent;
363     m_pPause = pPause;
364     m_fScreenHeight = fHeight;
365     m_ReflowedWidth = fWidth;
366     m_pProvider = IPDF_LayoutProvider::Create_LayoutProvider_TaggedPDF(m_pPDFPage);
367     LayoutStatus status = m_pProvider->StartLoad(pPause);
368     if(status == LayoutError) {
369         delete m_pProvider;
370         m_pProvider = IPDF_LayoutProvider::Create_LayoutProvider_AutoReflow(m_pPDFPage, m_flags & RF_PARSER_READERORDER);
371         if (NULL == m_pProvider) {
372             m_Status = Failed;
373             return;
374         }
375         status = m_pProvider->StartLoad(pPause);
376     }
377     if(status == LayoutError) {
378         delete m_pProvider;
379         m_pProvider = NULL;
380         m_Status = Failed;
381         return;
382     }
383     if(status == LayoutToBeContinued) {
384         m_Status = ToBeContinued;
385     } else if (status == LayoutFinished) {
386         m_pReflowEngine = IPDF_LayoutProcessor::Create_LayoutProcessor_Reflow(topIndent, fWidth, fHeight, pReflowPage, m_flags, m_ParseStyle.m_LineSpace);
387         if(NULL == m_pReflowEngine) {
388             delete m_pProvider;
389             m_pProvider = NULL;
390             m_Status = Failed;
391             return;
392         }
393         CFX_AffineMatrix matrix;
394         pPage->GetDisplayMatrix(matrix, 0, 0, (int)(pPage->GetPageWidth()), (int)(pPage->GetPageHeight()), 0);
395         CFX_AffineMatrix matrix1 = pPage->GetPageMatrix();
396         if((status = m_pReflowEngine->StartProcess(m_pProvider->GetRoot(), pPause, &matrix)) != LayoutToBeContinued) {
397             delete m_pReflowEngine;
398             m_pReflowEngine = NULL;
399             m_Status = Done;
400         } else {
401             m_Status = ToBeContinued;
402         }
403     }
404     if(status != LayoutToBeContinued) {
405         delete m_pProvider;
406         m_pProvider = NULL;
407     }
408     if(m_TopIndent && m_Status == Done) {
409         m_pReflowPage->m_PageHeight -= m_TopIndent;
410     }
411     return;
412 }
~CPDF_ProgressiveReflowPageRender()413 CPDF_ProgressiveReflowPageRender::~CPDF_ProgressiveReflowPageRender()
414 {
415     if(m_pDisplayMatrix) {
416         delete m_pDisplayMatrix;
417     }
418     m_pDisplayMatrix = NULL;
419 }
CPDF_ProgressiveReflowPageRender()420 CPDF_ProgressiveReflowPageRender::CPDF_ProgressiveReflowPageRender()
421 {
422     m_Status = Ready;
423     m_pReflowPage = NULL;
424     m_pDisplayMatrix = NULL;
425     m_CurrNum = 0;
426     m_pFontEncoding = NULL;
427     m_DisplayColor = -1;
428 }
_CIDTransformToFloat(FX_BYTE ch)429 static FX_FLOAT _CIDTransformToFloat(FX_BYTE ch)
430 {
431     if (ch < 128) {
432         return ch * 1.0f / 127;
433     }
434     return (-255 + ch) * 1.0f / 127;
435 }
GetPosition()436 int	CPDF_ProgressiveReflowPageRender::GetPosition()
437 {
438     if(m_CurrNum == 0 || NULL == m_pReflowPage) {
439         return 0;
440     }
441     int size = m_pReflowPage->m_pReflowed->GetSize();
442     if(size == 0 || m_CurrNum >= size) {
443         return 100;
444     }
445     return (int)(m_CurrNum * 100 / size);
446 }
Display(IFX_Pause * pPause)447 void CPDF_ProgressiveReflowPageRender::Display(IFX_Pause* pPause)
448 {
449     if (NULL == m_pReflowPage) {
450         m_Status = Done;
451         return;
452     }
453     FX_RECT clipBox = m_pFXDevice->GetClipBox();
454     int size = m_pReflowPage->m_pReflowed->GetSize();
455     if (size < 1 || NULL == m_pDisplayMatrix) {
456         m_Status = Done;
457         return;
458     }
459     for(int i = m_CurrNum; i < size; i++) {
460         CRF_Data* pData = (*m_pReflowPage->m_pReflowed)[i];
461         if(!pData) {
462             continue;
463         }
464         CFX_FloatRect rect (pData->m_PosX, pData->m_PosY + pData->m_Height, pData->m_PosX + pData->m_Width, pData->m_PosY);
465         m_pDisplayMatrix->TransformRect(rect);
466         if(rect.left > clipBox.right || rect.right < clipBox.left || rect.bottom > clipBox.bottom || rect.top < clipBox.top) {
467             continue;
468         }
469         if(pData->GetType() == CRF_Data::Text) {
470             CRF_CharData* pCharData = (CRF_CharData*)pData;
471             CPDF_Font* pPDFFont = pCharData->m_pCharState->m_pFont;
472             if(pPDFFont->GetFontType() == PDFFONT_TYPE3) {
473                 continue;
474             }
475             FX_FLOAT x = pData->m_PosX, y = pData->m_PosY - pCharData->m_pCharState->m_fDescent;
476             FXTEXT_CHARPOS charpos ;
477             charpos.m_GlyphIndex = pPDFFont->GlyphFromCharCode(pCharData->m_CharCode);
478             charpos.m_FontCharWidth = pPDFFont->m_Font.GetGlyphWidth(charpos.m_GlyphIndex);
479             charpos.m_OriginX       = x;
480             charpos.m_OriginY       = y;
481             FX_FLOAT charW = pData->m_Width * 1000 / pData->m_Height;
482             if(charW != charpos.m_FontCharWidth) {
483                 charpos.m_bGlyphAdjust  = TRUE;
484                 charpos.m_AdjustMatrix[0] = charW / charpos.m_FontCharWidth;
485                 charpos.m_AdjustMatrix[1] = 0;
486                 charpos.m_AdjustMatrix[2] = 0;
487                 charpos.m_AdjustMatrix[3] = 1;
488             } else {
489                 charpos.m_bGlyphAdjust  = FALSE;
490             }
491             FX_BOOL bRet = FALSE;
492             if(m_DisplayColor == -1)
493                 bRet = m_pFXDevice->DrawNormalText(1, &charpos, &(pPDFFont->m_Font),
494                                                    NULL, pCharData->m_pCharState->m_fFontSize,
495                                                    m_pDisplayMatrix, pCharData->m_pCharState->m_Color + 0xff000000, FXTEXT_CLEARTYPE);
496             else
497                 bRet = m_pFXDevice->DrawNormalText(1, &charpos, &(pPDFFont->m_Font),
498                                                    NULL, pCharData->m_pCharState->m_fFontSize, m_pDisplayMatrix, m_DisplayColor, FXTEXT_CLEARTYPE);
499         } else if(pData->GetType() == CRF_Data::Image) {
500             CRF_ImageData* pImageData = (CRF_ImageData*)pData;
501             if(!pImageData->m_pBitmap) {
502                 continue;
503             }
504             int left = 0, top = 0;
505             CFX_DIBitmap* pDiBmp = NULL;
506             CFX_DIBSource* pDispSource = pImageData->m_pBitmap;
507             if(pImageData->m_Matrix.d < 0) {
508                 CFX_AffineMatrix matrix(pImageData->m_Matrix.a, 0, 0, -pImageData->m_Matrix.d, 0, 0);
509                 int left, top;
510                 pDiBmp = pImageData->m_pBitmap->TransformTo(&matrix, left, top);
511                 pDispSource = pDiBmp;
512             }
513             if (NULL == pDispSource) {
514                 continue;
515             }
516             if (pDispSource->GetFormat() == FXDIB_1bppMask || pDispSource->GetFormat() == FXDIB_8bppMask) {
517                 m_pFXDevice->StretchBitMask(pDispSource, (int)(rect.left + 0.5), (int)(rect.bottom + 0.5), (int)(rect.Width() + 0.5), (int)(rect.Height() + 0.5), 0xff000000);
518             } else {
519                 m_pFXDevice->StretchDIBits(pDispSource, (int)(rect.left + 0.5), (int)(rect.bottom + 0.5), (int)(rect.Width() + 0.5), (int)(rect.Height() + 0.5));
520             }
521             if(m_pFXDevice->GetBitmap() && m_pFXDevice->GetBitmap()->GetFormat() == FXDIB_8bppRgb &&
522                     m_pFXDevice->GetBitmap()->GetPalette() == NULL) {
523                 int nPalette = 0;
524                 switch(m_DitherBits) {
525                     case 0:
526                         nPalette = 0;
527                         break;
528                     case 1:
529                         nPalette = 2;
530                         break;
531                     case 2:
532                         nPalette = 4;
533                         break;
534                     case 3:
535                         nPalette = 8;
536                         break;
537                     case 4:
538                         nPalette = 16;
539                         break;
540                     case 5:
541                         nPalette = 32;
542                         break;
543                     case 6:
544                         nPalette = 64;
545                         break;
546                     case 7:
547                         nPalette = 128;
548                         break;
549                     default:
550                         nPalette = 256;
551                         break;
552                 }
553                 if(nPalette >= 2) {
554                     FX_ARGB * palette = FX_Alloc(FX_ARGB, nPalette);
555                     nPalette --;
556                     palette[0] = 0;
557                     palette[nPalette] = 255;
558                     FX_FLOAT Dither = (FX_FLOAT)255 / (nPalette);
559                     for(int i = 1; i < nPalette; i++) {
560                         palette[i] = (FX_ARGB)(Dither * i + 0.5);
561                     }
562                     FX_RECT tmpRect = rect.GetOutterRect();
563                     m_pFXDevice->GetBitmap()->DitherFS(palette, nPalette + 1, &tmpRect);
564                     FX_Free (palette);
565                 }
566             }
567             if(pDiBmp) {
568                 delete pDiBmp;
569             }
570         } else if(pData->GetType() == CRF_Data::Path) {
571         }
572         if(!(i % 10)) {
573             if(pPause && pPause->NeedToPauseNow()) {
574                 i++;
575                 m_CurrNum = i;
576                 m_Status = ToBeContinued;
577                 return;
578             }
579         }
580     }
581     m_CurrNum = size;
582     m_Status = Done;
583 }
Start(IPDF_ReflowedPage * pReflowPage,CFX_RenderDevice * pDevice,const CFX_AffineMatrix * pMatrix,IFX_Pause * pPause,int DitherBits)584 void CPDF_ProgressiveReflowPageRender::Start(IPDF_ReflowedPage* pReflowPage, CFX_RenderDevice* pDevice, const CFX_AffineMatrix* pMatrix, IFX_Pause* pPause, int DitherBits)
585 {
586     if(!pReflowPage || !pDevice || !pMatrix) {
587         m_Status = Failed;
588         return;
589     }
590     m_DitherBits = DitherBits;
591     m_Status = Ready;
592     m_CurrNum = 0;
593     m_pReflowPage = (CPDF_ReflowedPage*)pReflowPage;
594     m_pFXDevice = pDevice;
595     if(NULL == m_pDisplayMatrix) {
596         m_pDisplayMatrix = FX_NEW CFX_AffineMatrix;
597     }
598     if (m_pDisplayMatrix) {
599         m_pDisplayMatrix->Copy(*pMatrix);
600     }
601     m_Status = ToBeContinued;
602     Display(pPause);
603 }
Continue(IFX_Pause * pPause)604 void CPDF_ProgressiveReflowPageRender::Continue(IFX_Pause* pPause)
605 {
606     Display(pPause);
607 }
SetDisplayColor(FX_COLORREF color)608 void CPDF_ProgressiveReflowPageRender::SetDisplayColor(FX_COLORREF color)
609 {
610     m_DisplayColor = color;
611 }
Clear()612 void CPDF_ProgressiveReflowPageRender::Clear()
613 {
614     if (m_pDisplayMatrix) {
615         delete m_pDisplayMatrix;
616     }
617     m_pDisplayMatrix = NULL;
618     m_pReflowPage = NULL;
619     m_pFXDevice = NULL;
620     m_CurrNum = 0;
621     m_Status = Ready;
622 }
623