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