Initial commit.

1 files changed, 622 insertions, 0 deletions

diff --git a/core/src/reflow/reflowedpage.cpp b/core/src/reflow/reflowedpage.cpp
new file mode 100644
index 0000000000..11baef8718
--- /dev/null
+++ b/core/src/reflow/reflowedpage.cpp
@@ -0,0 +1,622 @@
+// Copyright 2014 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+ 
+// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
+
+#include "../../include/reflow/reflowengine.h"
+#include "reflowedpage.h"
+CPDF_ProgressiveReflowPageParser::CPDF_ProgressiveReflowPageParser()
+{
+    m_nObjProcessed = 0;
+    m_pReflowEngine = NULL;
+    m_pProvider = NULL;
+}
+CPDF_ProgressiveReflowPageParser::~CPDF_ProgressiveReflowPageParser()
+{
+    if(m_pProvider) {
+        delete m_pProvider;
+    }
+    m_pProvider = NULL;
+    if(m_pReflowEngine) {
+        delete m_pReflowEngine;
+    }
+    m_pReflowEngine = NULL;
+}
+void CPDF_ProgressiveReflowPageParser::Init()
+{
+    m_Status = Ready;
+}
+CPDF_ReflowedPage::CPDF_ReflowedPage(CFX_GrowOnlyPool*	pMemoryPool)
+{
+    m_PageWidth = 0;
+    m_PageHeight = 0;
+    m_bWaiting = TRUE;
+    if(pMemoryPool) {
+        m_pMemoryPool = pMemoryPool;
+        m_bCreateMemoryPool = FALSE;
+    } else {
+        m_pMemoryPool = FX_NEW CFX_GrowOnlyPool;
+        m_bCreateMemoryPool = TRUE;
+    }
+    m_pCharState = FX_NEW CRF_CharStateArray(10);
+    m_pReflowed = FX_NEW CRF_DataPtrArray(500);
+    m_pPageInfos = NULL;
+}
+CPDF_ReflowedPage::~CPDF_ReflowedPage()
+{
+    if (m_pReflowed) {
+        for(int i = 0; i < m_pReflowed->GetSize(); i++) {
+            CRF_Data* pData = (*m_pReflowed)[i];
+            if(pData->m_Type == CRF_Data::Image) {
+                delete ((CRF_ImageData*)pData)->m_pBitmap;
+            }
+        }
+        m_pReflowed->RemoveAll();
+        delete m_pReflowed;
+    }
+    m_pReflowed = NULL;
+    if (m_pCharState) {
+        m_pCharState->RemoveAll();
+        delete m_pCharState;
+    }
+    m_pCharState = NULL;
+    if(m_bCreateMemoryPool && m_pMemoryPool) {
+        m_pMemoryPool->FreeAll();
+    }
+    if (m_pMemoryPool) {
+        delete m_pMemoryPool;
+    }
+    m_pMemoryPool = NULL;
+    m_pPDFPage = NULL;
+    if (m_pPageInfos) {
+        ReleasePageObjsMemberShip();
+    }
+}
+FX_BOOL CPDF_ReflowedPage::RetainPageObjsMemberShip()
+{
+    if (NULL == m_pPDFPage) {
+        return FALSE;
+    }
+    if (NULL == m_pPageInfos) {
+        m_pPageInfos = FX_NEW CFX_MapPtrToPtr();
+    } else {
+        return TRUE;
+    }
+    FX_POSITION	pos = m_pPDFPage->GetFirstObjectPosition();
+    if (!pos)	{
+        return FALSE;
+    }
+    CPDF_PageObject* pPageObj = NULL;
+    while (pos) {
+        pPageObj = m_pPDFPage->GetNextObject(pos);
+        MarkPageObjMemberShip(pPageObj, NULL);
+        pPageObj = NULL;
+    }
+    return TRUE;
+}
+void CPDF_ReflowedPage::MarkPageObjMemberShip(CPDF_PageObject* pObj, CRF_PageInfo* pParent)
+{
+    if (NULL == m_pPageInfos) {
+        return;
+    }
+    CRF_PageInfo* pPageInfo = FX_NEW CRF_PageInfo(pObj, pParent);
+    if (NULL == pPageInfo) {
+        return;
+    }
+    m_pPageInfos->SetAt(pObj, pPageInfo);
+    if (PDFPAGE_FORM != pObj->m_Type) {
+        return;
+    }
+    CPDF_FormObject* pFormObj = (CPDF_FormObject*)pObj;
+    FX_POSITION	pos;
+    pos = pFormObj->m_pForm->GetFirstObjectPosition();
+    if (!pos)	{
+        return;
+    }
+    CPDF_PageObject* pPageObj = NULL;
+    while (pos) {
+        pPageObj = pFormObj->m_pForm->GetNextObject(pos);
+        MarkPageObjMemberShip(pPageObj, pPageInfo);
+        pPageObj = NULL;
+    }
+}
+void CPDF_ReflowedPage::ReleasePageObjsMemberShip()
+{
+    if (NULL == m_pPageInfos) {
+        return;
+    }
+    CPDF_PageObject* pPageObj = NULL;
+    CRF_PageInfo* pPageInfo = NULL;
+    FX_POSITION pos = m_pPageInfos->GetStartPosition();
+    while (pos) {
+        m_pPageInfos->GetNextAssoc(pos, (void*&)pPageObj, (void*&)pPageInfo);
+        delete pPageInfo;
+    }
+    m_pPageInfos->RemoveAll();
+    delete m_pPageInfos;
+    m_pPageInfos = NULL;
+}
+CPDF_Dictionary* CPDF_ReflowedPage::GetFormResDict(CPDF_PageObject* pObj)
+{
+    if (NULL == m_pPageInfos) {
+        return NULL;
+    }
+    if (FALSE == RetainPageObjsMemberShip()) {
+        return NULL;
+    }
+    CRF_PageInfo* pPageInfo = (CRF_PageInfo*)m_pPageInfos->GetValueAt(pObj);
+    if (NULL == pPageInfo) {
+        return NULL;
+    }
+    return pPageInfo->GetFormDict();
+}
+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)
+{
+    CFX_AffineMatrix display_matrix;
+    if(m_PageHeight == 0) {
+        matrix.Set(1, 0, 0, -1, 0, 0);
+        return;
+    }
+    FX_INT32 x0, y0, x1, y1, x2, y2;
+    iRotate %= 4;
+    switch (iRotate) {
+        case 0:
+            x0 = xPos;
+            y0 = yPos;
+            x1 = xPos;
+            y1 = yPos + ySize;
+            x2 = xPos + xSize;
+            y2 = yPos;
+            break;
+        case 3:
+            x0 = xPos;
+            y0 = ySize + yPos;
+            x1 =  xPos + xSize;
+            y1 = yPos + ySize;
+            x2 = xPos;
+            y2 = yPos;
+            break;
+        case 2:
+            x0 = xSize + xPos;
+            y0 = ySize + yPos;
+            x1 = xSize + xPos ;
+            y1 = yPos;
+            x2 = xPos;
+            y2 =  ySize + yPos;
+            break;
+        case 1:
+            x0 = xPos + xSize;
+            y0 = yPos;
+            x1 = xPos;
+            y1 = yPos;
+            x2 = xPos + xSize;
+            y2 = yPos + ySize;
+            break;
+    }
+    display_matrix.Set(FXSYS_Div((FX_FLOAT)(x2 - x0), m_PageWidth),
+                       FXSYS_Div((FX_FLOAT)(y2 - y0), m_PageWidth),
+                       FXSYS_Div((FX_FLOAT)(x1 - x0), m_PageHeight),
+                       FXSYS_Div((FX_FLOAT)(y1 - y0), m_PageHeight),
+                       (FX_FLOAT)(x0), (FX_FLOAT)(y0));
+    matrix.Set(1.0f, 0.0f, 0.0f, -1.0f, 0.0f, 0.0f);
+    matrix.Concat(display_matrix);
+    return;
+}
+FX_FLOAT CPDF_ReflowedPage::GetPageHeight()
+{
+    return m_PageHeight;
+}
+void CPDF_ReflowedPage::FocusGetData(const CFX_AffineMatrix matrix, FX_INT32 x, FX_INT32 y, CFX_ByteString& str)
+{
+    if (NULL == m_pReflowed) {
+        return;
+    }
+    CFX_AffineMatrix revMatrix;
+    revMatrix.SetReverse(matrix);
+    FX_FLOAT x1, y1;
+    revMatrix.Transform((float)x, (float)y, x1, y1);
+    int count = m_pReflowed->GetSize();
+    FX_FLOAT dx = 1000, dy = 1000;
+    FX_INT32 pos = 0;
+    FX_INT32 i;
+    for(i = 0; i < count; i++) {
+        CRF_Data* pData = (*m_pReflowed)[i];
+        FX_FLOAT tempdy = FXSYS_fabs(pData->m_PosY - y1);
+        if(FXSYS_fabs(tempdy - dy) < 1) {
+            continue;
+        }
+        CFX_FloatRect rect (0, pData->m_PosY + pData->m_Height, this->m_PageWidth, pData->m_PosY);
+        if(rect.Contains(x1, y1)) {
+            pos = i;
+            dx = 0;
+            dy = 0;
+            break;
+        } else if(tempdy < dy) {
+            dy = tempdy;
+            dx = FXSYS_fabs(pData->m_PosX - x1);
+            pos = i;
+        } else if (tempdy == dy) {
+            FX_FLOAT tempdx = FXSYS_fabs(pData->m_PosX - x1);
+            if(tempdx < dx) {
+                dx = tempdx;
+                pos = i;
+            }
+        } else if (tempdy > dy) {
+            break;
+        }
+    }
+    if(dx != 0 || dy != 0) {
+        count = count < (pos + 10) ? count : (pos + 10);
+        for(i = 0 > (pos - 10) ? 0 : (pos - 10); i < count; i++) {
+            CRF_Data* pData = (*m_pReflowed)[i];
+            FX_FLOAT tempdy = FXSYS_fabs(pData->m_PosY - y1);
+            if(tempdy < dy) {
+                dy = tempdy;
+                dx = FXSYS_fabs(pData->m_PosX - x1);
+                pos = i;
+            } else if (tempdy == dy) {
+                FX_FLOAT tempdx = FXSYS_fabs(pData->m_PosX - x1);
+                if(tempdx < dx) {
+                    dx = tempdx;
+                    pos = i;
+                }
+            }
+        }
+    }
+    str.Format("%d", pos);
+}
+FX_BOOL CPDF_ReflowedPage::FocusGetPosition(const CFX_AffineMatrix matrix, CFX_ByteString str, FX_INT32& x, FX_INT32& y)
+{
+    if (NULL == m_pReflowed) {
+        return FALSE;
+    }
+    FX_INT32 pos = FXSYS_atoi(str);
+    if(pos < 0 || pos >= m_pReflowed->GetSize()) {
+        return FALSE;
+    }
+    CRF_Data* pData = (*m_pReflowed)[pos];
+    FX_FLOAT x1, y1;
+    matrix.Transform(pData->m_PosX, pData->m_PosY + pData->m_Height, x1, y1);
+    x = (int)x1;
+    y = (int)y1;
+    return TRUE;
+}
+int CPDF_ProgressiveReflowPageParser::GetPosition()
+{
+    if(!m_pProvider) {
+        return 0;
+    }
+    if(!m_pReflowEngine) {
+        return m_pProvider->GetPosition() / 2;
+    }
+    return m_pProvider->GetPosition() / 2 + m_pReflowEngine->GetPosition() / 2;
+}
+void CPDF_ProgressiveReflowPageParser::Continue(IFX_Pause* pPause)
+{
+    if (NULL == m_pReflowPage) {
+        return;
+    }
+    if(m_Status != ToBeContinued) {
+        return;
+    }
+    m_pPause = pPause;
+    if(m_pReflowEngine) {
+        if(m_pReflowEngine->Continue() != LayoutToBeContinued) {
+            m_Status = Done;
+        }
+    } else {
+        if(m_pProvider->Continue() == LayoutFinished) {
+            m_pReflowEngine = IPDF_LayoutProcessor::Create_LayoutProcessor_Reflow(m_TopIndent, m_ReflowedWidth, m_fScreenHeight, m_pReflowPage, m_flags, m_ParseStyle.m_LineSpace);
+            CFX_AffineMatrix matrix;
+            m_pPDFPage->GetDisplayMatrix(matrix, 0, 0, (int)(m_pPDFPage->GetPageWidth()), (int)(m_pPDFPage->GetPageHeight()), 0);
+            if(m_pReflowEngine->StartProcess(m_pProvider->GetRoot(), m_pPause, &matrix) != LayoutToBeContinued) {
+                m_Status = Done;
+            }
+        }
+    }
+    if(m_TopIndent && m_Status == Done) {
+        m_pReflowPage->m_PageHeight -= m_TopIndent;
+    }
+}
+void CPDF_ProgressiveReflowPageParser::Clear()
+{
+    this->Init();
+    return;
+}
+FX_BOOL IPDF_ProgressiveReflowPageParser::IsTaggedPage(CPDF_PageObjects*pPage)
+{
+    if(!pPage) {
+        return FALSE;
+    }
+    CPDF_StructTree* pPageTree = CPDF_StructTree::LoadPage(pPage->m_pDocument, pPage->m_pFormDict);
+    if(pPageTree) {
+        int count = pPageTree->CountTopElements();
+        if(count) {
+            for(int i = 0; i < count; i++) {
+                CPDF_StructElement* pElm = pPageTree->GetTopElement(i);
+                if(pElm) {
+                    delete pPageTree;
+                    pPageTree = NULL;
+                    return TRUE;
+                }
+            }
+        }
+        delete pPageTree;
+        pPageTree = NULL;
+        return FALSE;
+    }
+    return FALSE;
+}
+void CPDF_ProgressiveReflowPageParser::Start(IPDF_ReflowedPage* pReflowPage, CPDF_Page* pPage, FX_FLOAT topIndent, FX_FLOAT fWidth, FX_FLOAT fHeight, IFX_Pause* pPause, int flags)
+{
+    if (NULL == pReflowPage) {
+        m_Status = Failed;
+        return;
+    }
+    m_flags = flags;
+    m_pReflowPage = (CPDF_ReflowedPage*)pReflowPage;
+    m_pReflowPage->m_pPDFPage = pPage;
+    m_pReflowPage->ReleasePageObjsMemberShip();
+    m_pPDFPage = pPage;
+    m_TopIndent = topIndent;
+    m_pPause = pPause;
+    m_fScreenHeight = fHeight;
+    m_ReflowedWidth = fWidth;
+    m_pProvider = IPDF_LayoutProvider::Create_LayoutProvider_TaggedPDF(m_pPDFPage);
+    LayoutStatus status = m_pProvider->StartLoad(pPause);
+    if(status == LayoutError) {
+        delete m_pProvider;
+        m_pProvider = IPDF_LayoutProvider::Create_LayoutProvider_AutoReflow(m_pPDFPage, m_flags & RF_PARSER_READERORDER);
+        if (NULL == m_pProvider) {
+            m_Status = Failed;
+            return;
+        }
+        status = m_pProvider->StartLoad(pPause);
+    }
+    if(status == LayoutError) {
+        delete m_pProvider;
+        m_pProvider = NULL;
+        m_Status = Failed;
+        return;
+    }
+    if(status == LayoutToBeContinued) {
+        m_Status = ToBeContinued;
+    } else if (status == LayoutFinished) {
+        m_pReflowEngine = IPDF_LayoutProcessor::Create_LayoutProcessor_Reflow(topIndent, fWidth, fHeight, pReflowPage, m_flags, m_ParseStyle.m_LineSpace);
+        if(NULL == m_pReflowEngine) {
+            delete m_pProvider;
+            m_pProvider = NULL;
+            m_Status = Failed;
+            return;
+        }
+        CFX_AffineMatrix matrix;
+        pPage->GetDisplayMatrix(matrix, 0, 0, (int)(pPage->GetPageWidth()), (int)(pPage->GetPageHeight()), 0);
+        CFX_AffineMatrix matrix1 = pPage->GetPageMatrix();
+        if((status = m_pReflowEngine->StartProcess(m_pProvider->GetRoot(), pPause, &matrix)) != LayoutToBeContinued) {
+            delete m_pReflowEngine;
+            m_pReflowEngine = NULL;
+            m_Status = Done;
+        } else {
+            m_Status = ToBeContinued;
+        }
+    }
+    if(status != LayoutToBeContinued) {
+        delete m_pProvider;
+        m_pProvider = NULL;
+    }
+    if(m_TopIndent && m_Status == Done) {
+        m_pReflowPage->m_PageHeight -= m_TopIndent;
+    }
+    return;
+}
+CPDF_ProgressiveReflowPageRender::~CPDF_ProgressiveReflowPageRender()
+{
+    if(m_pDisplayMatrix) {
+        delete m_pDisplayMatrix;
+    }
+    m_pDisplayMatrix = NULL;
+}
+CPDF_ProgressiveReflowPageRender::CPDF_ProgressiveReflowPageRender()
+{
+    m_Status = Ready;
+    m_pReflowPage = NULL;
+    m_pDisplayMatrix = NULL;
+    m_CurrNum = 0;
+    m_pFontEncoding = NULL;
+    m_DisplayColor = -1;
+}
+static FX_FLOAT _CIDTransformToFloat(FX_BYTE ch)
+{
+    if (ch < 128) {
+        return ch * 1.0f / 127;
+    }
+    return (-255 + ch) * 1.0f / 127;
+}
+int	CPDF_ProgressiveReflowPageRender::GetPosition()
+{
+    if(m_CurrNum == 0 || NULL == m_pReflowPage) {
+        return 0;
+    }
+    int size = m_pReflowPage->m_pReflowed->GetSize();
+    if(size == 0 || m_CurrNum >= size) {
+        return 100;
+    }
+    return (int)(m_CurrNum * 100 / size);
+}
+void CPDF_ProgressiveReflowPageRender::Display(IFX_Pause* pPause)
+{
+    if (NULL == m_pReflowPage) {
+        m_Status = Done;
+        return;
+    }
+    FX_RECT clipBox = m_pFXDevice->GetClipBox();
+    int size = m_pReflowPage->m_pReflowed->GetSize();
+    if (size < 1 || NULL == m_pDisplayMatrix) {
+        m_Status = Done;
+        return;
+    }
+    for(int i = m_CurrNum; i < size; i++) {
+        CRF_Data* pData = (*m_pReflowPage->m_pReflowed)[i];
+        if(!pData) {
+            continue;
+        }
+        CFX_FloatRect rect (pData->m_PosX, pData->m_PosY + pData->m_Height, pData->m_PosX + pData->m_Width, pData->m_PosY);
+        m_pDisplayMatrix->TransformRect(rect);
+        if(rect.left > clipBox.right || rect.right < clipBox.left || rect.bottom > clipBox.bottom || rect.top < clipBox.top) {
+            continue;
+        }
+        if(pData->GetType() == CRF_Data::Text) {
+            CRF_CharData* pCharData = (CRF_CharData*)pData;
+            CPDF_Font* pPDFFont = pCharData->m_pCharState->m_pFont;
+            if(pPDFFont->GetFontType() == PDFFONT_TYPE3) {
+                continue;
+            }
+            FX_FLOAT x = pData->m_PosX, y = pData->m_PosY - pCharData->m_pCharState->m_fDescent;
+            FXTEXT_CHARPOS charpos ;
+            charpos.m_GlyphIndex = pPDFFont->GlyphFromCharCode(pCharData->m_CharCode);
+            charpos.m_FontCharWidth = pPDFFont->m_Font.GetGlyphWidth(charpos.m_GlyphIndex);
+            charpos.m_OriginX       = x;
+            charpos.m_OriginY       = y;
+            FX_FLOAT charW = pData->m_Width * 1000 / pData->m_Height;
+            if(charW != charpos.m_FontCharWidth) {
+                charpos.m_bGlyphAdjust  = TRUE;
+                charpos.m_AdjustMatrix[0] = charW / charpos.m_FontCharWidth;
+                charpos.m_AdjustMatrix[1] = 0;
+                charpos.m_AdjustMatrix[2] = 0;
+                charpos.m_AdjustMatrix[3] = 1;
+            } else {
+                charpos.m_bGlyphAdjust  = FALSE;
+            }
+            FX_BOOL bRet = FALSE;
+            if(m_DisplayColor == -1)
+                bRet = m_pFXDevice->DrawNormalText(1, &charpos, &(pPDFFont->m_Font),
+                                                   NULL, pCharData->m_pCharState->m_fFontSize,
+                                                   m_pDisplayMatrix, pCharData->m_pCharState->m_Color + 0xff000000, FXTEXT_CLEARTYPE);
+            else
+                bRet = m_pFXDevice->DrawNormalText(1, &charpos, &(pPDFFont->m_Font),
+                                                   NULL, pCharData->m_pCharState->m_fFontSize, m_pDisplayMatrix, m_DisplayColor, FXTEXT_CLEARTYPE);
+        } else if(pData->GetType() == CRF_Data::Image) {
+            CRF_ImageData* pImageData = (CRF_ImageData*)pData;
+            if(!pImageData->m_pBitmap) {
+                continue;
+            }
+            int left = 0, top = 0;
+            CFX_DIBitmap* pDiBmp = NULL;
+            CFX_DIBSource* pDispSource = pImageData->m_pBitmap;
+            if(pImageData->m_Matrix.d < 0) {
+                CFX_AffineMatrix matrix(pImageData->m_Matrix.a, 0, 0, -pImageData->m_Matrix.d, 0, 0);
+                int left, top;
+                pDiBmp = pImageData->m_pBitmap->TransformTo(&matrix, left, top);
+                pDispSource = pDiBmp;
+            }
+            if (NULL == pDispSource) {
+                continue;
+            }
+            if (pDispSource->GetFormat() == FXDIB_1bppMask || pDispSource->GetFormat() == FXDIB_8bppMask) {
+                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);
+            } else {
+                m_pFXDevice->StretchDIBits(pDispSource, (int)(rect.left + 0.5), (int)(rect.bottom + 0.5), (int)(rect.Width() + 0.5), (int)(rect.Height() + 0.5));
+            }
+            if(m_pFXDevice->GetBitmap() && m_pFXDevice->GetBitmap()->GetFormat() == FXDIB_8bppRgb &&
+                    m_pFXDevice->GetBitmap()->GetPalette() == NULL) {
+                int nPalette = 0;
+                switch(m_DitherBits) {
+                    case 0:
+                        nPalette = 0;
+                        break;
+                    case 1:
+                        nPalette = 2;
+                        break;
+                    case 2:
+                        nPalette = 4;
+                        break;
+                    case 3:
+                        nPalette = 8;
+                        break;
+                    case 4:
+                        nPalette = 16;
+                        break;
+                    case 5:
+                        nPalette = 32;
+                        break;
+                    case 6:
+                        nPalette = 64;
+                        break;
+                    case 7:
+                        nPalette = 128;
+                        break;
+                    default:
+                        nPalette = 256;
+                        break;
+                }
+                if(nPalette >= 2) {
+                    FX_ARGB * palette = FX_Alloc(FX_ARGB, nPalette);
+                    nPalette --;
+                    palette[0] = 0;
+                    palette[nPalette] = 255;
+                    FX_FLOAT Dither = (FX_FLOAT)255 / (nPalette);
+                    for(int i = 1; i < nPalette; i++) {
+                        palette[i] = (FX_ARGB)(Dither * i + 0.5);
+                    }
+                    FX_RECT tmpRect = rect.GetOutterRect();
+                    m_pFXDevice->GetBitmap()->DitherFS(palette, nPalette + 1, &tmpRect);
+                    FX_Free (palette);
+                }
+            }
+            if(pDiBmp) {
+                delete pDiBmp;
+            }
+        } else if(pData->GetType() == CRF_Data::Path) {
+        }
+        if(!(i % 10)) {
+            if(pPause && pPause->NeedToPauseNow()) {
+                i++;
+                m_CurrNum = i;
+                m_Status = ToBeContinued;
+                return;
+            }
+        }
+    }
+    m_CurrNum = size;
+    m_Status = Done;
+}
+void CPDF_ProgressiveReflowPageRender::Start(IPDF_ReflowedPage* pReflowPage, CFX_RenderDevice* pDevice, const CFX_AffineMatrix* pMatrix, IFX_Pause* pPause, int DitherBits)
+{
+    if(!pReflowPage || !pDevice || !pMatrix) {
+        m_Status = Failed;
+        return;
+    }
+    m_DitherBits = DitherBits;
+    m_Status = Ready;
+    m_CurrNum = 0;
+    m_pReflowPage = (CPDF_ReflowedPage*)pReflowPage;
+    m_pFXDevice = pDevice;
+    if(NULL == m_pDisplayMatrix) {
+        m_pDisplayMatrix = FX_NEW CFX_AffineMatrix;
+    }
+    if (m_pDisplayMatrix) {
+        m_pDisplayMatrix->Copy(*pMatrix);
+    }
+    m_Status = ToBeContinued;
+    Display(pPause);
+}
+void CPDF_ProgressiveReflowPageRender::Continue(IFX_Pause* pPause)
+{
+    Display(pPause);
+}
+void CPDF_ProgressiveReflowPageRender::SetDisplayColor(FX_COLORREF color)
+{
+    m_DisplayColor = color;
+}
+void CPDF_ProgressiveReflowPageRender::Clear()
+{
+    if (m_pDisplayMatrix) {
+        delete m_pDisplayMatrix;
+    }
+    m_pDisplayMatrix = NULL;
+    m_pReflowPage = NULL;
+    m_pFXDevice = NULL;
+    m_CurrNum = 0;
+    m_Status = Ready;
+}