C++ CFX_DIBitmap::Create方法代码示例

CFX_DIBitmap* CFX_WindowsDIB::LoadDIBitmap(WINDIB_Open_Args_ args)
{
    CWin32Platform* pPlatform = (CWin32Platform*)CFX_GEModule::Get()->GetPlatformData();
    if (pPlatform->m_GdiplusExt.IsAvailable()) {
        return pPlatform->m_GdiplusExt.LoadDIBitmap(args);
    } else if (args.flags == WINDIB_OPEN_MEMORY) {
        return NULL;
    }
    HBITMAP hBitmap = (HBITMAP)LoadImageW(NULL, (wchar_t*)args.path_name, IMAGE_BITMAP, 0, 0, LR_LOADFROMFILE);
    if (hBitmap == NULL) {
        return NULL;
    }
    HDC hDC = CreateCompatibleDC(NULL);
    int width, height;
    GetBitmapSize(hBitmap, width, height);
    CFX_DIBitmap* pDIBitmap = new CFX_DIBitmap;
    if (!pDIBitmap->Create(width, height, FXDIB_Rgb)) {
        delete pDIBitmap;
        DeleteDC(hDC);
        return NULL;
    }
    CFX_ByteString info = GetBitmapInfo(pDIBitmap);
    int ret = GetDIBits(hDC, hBitmap, 0, height, pDIBitmap->GetBuffer(), (BITMAPINFO*)info.c_str(), DIB_RGB_COLORS);
    if (!ret) {
        delete pDIBitmap;
        pDIBitmap = NULL;
    }
    DeleteDC(hDC);
    return pDIBitmap;
}

static CFX_DIBitmap* DrawPatternBitmap(CPDF_Document* pDoc,
                                       CPDF_PageRenderCache* pCache,
                                       CPDF_TilingPattern* pPattern,
                                       const CFX_Matrix* pObject2Device,
                                       int width,
                                       int height,
                                       int flags) {
  CFX_DIBitmap* pBitmap = new CFX_DIBitmap;
  if (!pBitmap->Create(width, height,
                       pPattern->m_bColored ? FXDIB_Argb : FXDIB_8bppMask)) {
    delete pBitmap;
    return NULL;
  }
  CFX_FxgeDevice bitmap_device;
  bitmap_device.Attach(pBitmap);
  pBitmap->Clear(0);
  CFX_FloatRect cell_bbox = pPattern->m_BBox;
  pPattern->m_Pattern2Form.TransformRect(cell_bbox);
  pObject2Device->TransformRect(cell_bbox);
  CFX_FloatRect bitmap_rect(0.0f, 0.0f, (FX_FLOAT)width, (FX_FLOAT)height);
  CFX_Matrix mtAdjust;
  mtAdjust.MatchRect(bitmap_rect, cell_bbox);
  CFX_Matrix mtPattern2Bitmap = *pObject2Device;
  mtPattern2Bitmap.Concat(mtAdjust);
  CPDF_RenderOptions options;
  if (!pPattern->m_bColored) {
    options.m_ColorMode = RENDER_COLOR_ALPHA;
  }
  flags |= RENDER_FORCE_HALFTONE;
  options.m_Flags = flags;
  CPDF_RenderContext context(pDoc, pCache);
  context.DrawObjectList(&bitmap_device, pPattern->m_pForm, &mtPattern2Bitmap,
                         &options);
  return pBitmap;
}

 FX_BOOL FDE_GetStockHatchMask(int32_t iHatchStyle, CFX_DIBitmap & hatchMask) {
     FDE_LPCHATCHDATA pData = FDE_DEVGetHatchData(iHatchStyle);
     if (!pData) {
         return FALSE;
     }
     hatchMask.Create(pData->iWidth, pData->iHeight, FXDIB_1bppMask);
     FXSYS_memcpy(hatchMask.GetBuffer(), pData->MaskBits,
                  hatchMask.GetPitch() * pData->iHeight);
     return TRUE;
 }

CFX_DIBitmap* _FX_WindowsDIB_LoadFromBuf(BITMAPINFO* pbmi, LPVOID pData, FX_BOOL bAlpha)
{
    int width = pbmi->bmiHeader.biWidth;
    int height = pbmi->bmiHeader.biHeight;
    BOOL bBottomUp = TRUE;
    if (height < 0) {
        height = -height;
        bBottomUp = FALSE;
    }
    int pitch = (width * pbmi->bmiHeader.biBitCount + 31) / 32 * 4;
    CFX_DIBitmap* pBitmap = FX_NEW CFX_DIBitmap;
    if (!pBitmap) {
        return NULL;
    }
    FXDIB_Format format = bAlpha ? (FXDIB_Format)(pbmi->bmiHeader.biBitCount + 0x200) : (FXDIB_Format)pbmi->bmiHeader.biBitCount;
    FX_BOOL ret = pBitmap->Create(width, height, format);
    if (!ret) {
        delete pBitmap;
        return NULL;
    }
    FXSYS_memcpy32(pBitmap->GetBuffer(), pData, pitch * height);
    if (bBottomUp) {
        FX_LPBYTE temp_buf = FX_Alloc(FX_BYTE, pitch);
        if (!temp_buf) {
            if (pBitmap) {
                delete pBitmap;
            }
            return NULL;
        }
        int top = 0, bottom = height - 1;
        while (top < bottom) {
            FXSYS_memcpy32(temp_buf, pBitmap->GetBuffer() + top * pitch, pitch);
            FXSYS_memcpy32(pBitmap->GetBuffer() + top * pitch, pBitmap->GetBuffer() + bottom * pitch, pitch);
            FXSYS_memcpy32(pBitmap->GetBuffer() + bottom * pitch, temp_buf, pitch);
            top ++;
            bottom --;
        }
        FX_Free(temp_buf);
        temp_buf = NULL;
    }
    if (pbmi->bmiHeader.biBitCount == 1) {
        for (int i = 0; i < 2; i ++) {
            pBitmap->SetPaletteEntry(i, ((FX_DWORD*)pbmi->bmiColors)[i] | 0xff000000);
        }
    } else if (pbmi->bmiHeader.biBitCount == 8) {
        for (int i = 0; i < 256; i ++) {
            pBitmap->SetPaletteEntry(i, ((FX_DWORD*)pbmi->bmiColors)[i] | 0xff000000);
        }
    }
    return pBitmap;
}

FX_BOOL CFX_QuartzDevice::Create(FX_INT32 width, FX_INT32 height, FXDIB_Format format)
{
    if ((FX_BYTE)format < 32) {
        return FALSE;
    }
    CFX_DIBitmap* pBitmap = FX_NEW CFX_DIBitmap;
    if (!pBitmap) {
        return FALSE;
    }
    if (!pBitmap->Create(width, height, format)) {
        delete pBitmap;
        return FALSE;
    }
    m_bOwnedBitmap = TRUE;
    return Attach(pBitmap);
}

STDMETHODIMP CDwGdiTextRenderer::DrawGlyphRun(
    const FX_RECT& text_bbox,
    __in_opt CFX_ClipRgn* pClipRgn,
    __in_opt DWRITE_MATRIX const* pMatrix,
    FLOAT baselineOriginX,
    FLOAT baselineOriginY,
    DWRITE_MEASURING_MODE measuringMode,
    __in DWRITE_GLYPH_RUN const* glyphRun,
    const COLORREF& textColor) {
  HRESULT hr = S_OK;
  if (pMatrix) {
    hr = pRenderTarget_->SetCurrentTransform(pMatrix);
    if (FAILED(hr)) {
      return hr;
    }
  }
  HDC hDC = pRenderTarget_->GetMemoryDC();
  HBITMAP hBitmap = (HBITMAP)::GetCurrentObject(hDC, OBJ_BITMAP);
  BITMAP bitmap;
  GetObject(hBitmap, sizeof bitmap, &bitmap);
  CFX_DIBitmap dib;
  dib.Create(bitmap.bmWidth, bitmap.bmHeight,
             bitmap.bmBitsPixel == 24 ? FXDIB_Rgb : FXDIB_Rgb32,
             (uint8_t*)bitmap.bmBits);
  dib.CompositeBitmap(text_bbox.left, text_bbox.top, text_bbox.Width(),
                      text_bbox.Height(), pBitmap_, text_bbox.left,
                      text_bbox.top, FXDIB_BLEND_NORMAL, nullptr);
  hr = pRenderTarget_->DrawGlyphRun(baselineOriginX, baselineOriginY,
                                    measuringMode, glyphRun, pRenderingParams_,
                                    textColor);
  if (FAILED(hr)) {
    return hr;
  }
  pBitmap_->CompositeBitmap(text_bbox.left, text_bbox.top, text_bbox.Width(),
                            text_bbox.Height(), &dib, text_bbox.left,
                            text_bbox.top, FXDIB_BLEND_NORMAL, pClipRgn);
  return hr;
}

DLLEXPORT FPDF_BITMAP STDCALL FPDFBitmap_CreateEx(int width, int height, int format, void* first_scan, int stride)
{
    FXDIB_Format fx_format;
    switch (format) {
    case FPDFBitmap_Gray:
        fx_format = FXDIB_8bppRgb;
        break;
    case FPDFBitmap_BGR:
        fx_format = FXDIB_Rgb;
        break;
    case FPDFBitmap_BGRx:
        fx_format = FXDIB_Rgb32;
        break;
    case FPDFBitmap_BGRA:
        fx_format = FXDIB_Argb;
        break;
    default:
        return NULL;
    }
    CFX_DIBitmap* pBitmap = FX_NEW CFX_DIBitmap;
    pBitmap->Create(width, height, fx_format, (FX_LPBYTE)first_scan, stride);
    return pBitmap;
}

CFX_DIBitmap* CFX_WindowsDIB::LoadFromFile(FX_LPCWSTR filename)
{
    CWin32Platform* pPlatform = (CWin32Platform*)CFX_GEModule::Get()->GetPlatformData();
    if (pPlatform->m_GdiplusExt.IsAvailable()) {
        WINDIB_Open_Args_ args;
        args.flags = WINDIB_OPEN_PATHNAME;
        args.path_name = filename;
        return pPlatform->m_GdiplusExt.LoadDIBitmap(args);
    }
    HBITMAP hBitmap = (HBITMAP)LoadImageW(NULL, (wchar_t*)filename, IMAGE_BITMAP, 0, 0, LR_LOADFROMFILE);
    if (hBitmap == NULL) {
        return NULL;
    }
    HDC hDC = CreateCompatibleDC(NULL);
    int width, height;
    GetBitmapSize(hBitmap, width, height);
    CFX_DIBitmap* pDIBitmap = FX_NEW CFX_DIBitmap;
    if (!pDIBitmap) {
        DeleteDC(hDC);
        return NULL;
    }
    if (!pDIBitmap->Create(width, height, FXDIB_Rgb)) {
        delete pDIBitmap;
        DeleteDC(hDC);
        return NULL;
    }
    CFX_ByteString info = GetBitmapInfo(pDIBitmap);
    int ret = GetDIBits(hDC, hBitmap, 0, height, pDIBitmap->GetBuffer(), (BITMAPINFO*)(FX_LPCSTR)info, DIB_RGB_COLORS);
    if (!ret) {
        if (pDIBitmap) {
            delete pDIBitmap;
        }
        pDIBitmap = NULL;
    }
    DeleteDC(hDC);
    return pDIBitmap;
}

CFX_DIBitmap* CFX_DIBSource::SwapXY(FX_BOOL bXFlip,
                                    FX_BOOL bYFlip,
                                    const FX_RECT* pDestClip) const {
  FX_RECT dest_clip(0, 0, m_Height, m_Width);
  if (pDestClip) {
    dest_clip.Intersect(*pDestClip);
  }
  if (dest_clip.IsEmpty()) {
    return nullptr;
  }
  CFX_DIBitmap* pTransBitmap = new CFX_DIBitmap;
  int result_height = dest_clip.Height(), result_width = dest_clip.Width();
  if (!pTransBitmap->Create(result_width, result_height, GetFormat())) {
    delete pTransBitmap;
    return nullptr;
  }
  pTransBitmap->CopyPalette(m_pPalette.get());
  int dest_pitch = pTransBitmap->GetPitch();
  uint8_t* dest_buf = pTransBitmap->GetBuffer();
  int row_start = bXFlip ? m_Height - dest_clip.right : dest_clip.left;
  int row_end = bXFlip ? m_Height - dest_clip.left : dest_clip.right;
  int col_start = bYFlip ? m_Width - dest_clip.bottom : dest_clip.top;
  int col_end = bYFlip ? m_Width - dest_clip.top : dest_clip.bottom;
  if (GetBPP() == 1) {
    FXSYS_memset(dest_buf, 0xff, dest_pitch * result_height);
    for (int row = row_start; row < row_end; row++) {
      const uint8_t* src_scan = GetScanline(row);
      int dest_col = (bXFlip ? dest_clip.right - (row - row_start) - 1 : row) -
                     dest_clip.left;
      uint8_t* dest_scan = dest_buf;
      if (bYFlip) {
        dest_scan += (result_height - 1) * dest_pitch;
      }
      int dest_step = bYFlip ? -dest_pitch : dest_pitch;
      for (int col = col_start; col < col_end; col++) {
        if (!(src_scan[col / 8] & (1 << (7 - col % 8)))) {
          dest_scan[dest_col / 8] &= ~(1 << (7 - dest_col % 8));
        }
        dest_scan += dest_step;
      }
    }
  } else {
    int nBytes = GetBPP() / 8;
    int dest_step = bYFlip ? -dest_pitch : dest_pitch;
    if (nBytes == 3) {
      dest_step -= 2;
    }
    for (int row = row_start; row < row_end; row++) {
      int dest_col = (bXFlip ? dest_clip.right - (row - row_start) - 1 : row) -
                     dest_clip.left;
      uint8_t* dest_scan = dest_buf + dest_col * nBytes;
      if (bYFlip) {
        dest_scan += (result_height - 1) * dest_pitch;
      }
      if (nBytes == 4) {
        uint32_t* src_scan = (uint32_t*)GetScanline(row) + col_start;
        for (int col = col_start; col < col_end; col++) {
          *(uint32_t*)dest_scan = *src_scan++;
          dest_scan += dest_step;
        }
      } else {
        const uint8_t* src_scan = GetScanline(row) + col_start * nBytes;
        if (nBytes == 1) {
          for (int col = col_start; col < col_end; col++) {
            *dest_scan = *src_scan++;
            dest_scan += dest_step;
          }
        } else {
          for (int col = col_start; col < col_end; col++) {
            *dest_scan++ = *src_scan++;
            *dest_scan++ = *src_scan++;
            *dest_scan = *src_scan++;
            dest_scan += dest_step;
          }
        }
      }
    }
  }
  if (m_pAlphaMask) {
    dest_pitch = pTransBitmap->m_pAlphaMask->GetPitch();
    dest_buf = pTransBitmap->m_pAlphaMask->GetBuffer();
    int dest_step = bYFlip ? -dest_pitch : dest_pitch;
    for (int row = row_start; row < row_end; row++) {
      int dest_col = (bXFlip ? dest_clip.right - (row - row_start) - 1 : row) -
                     dest_clip.left;
      uint8_t* dest_scan = dest_buf + dest_col;
      if (bYFlip) {
        dest_scan += (result_height - 1) * dest_pitch;
      }
      const uint8_t* src_scan = m_pAlphaMask->GetScanline(row) + col_start;
      for (int col = col_start; col < col_end; col++) {
        *dest_scan = *src_scan++;
        dest_scan += dest_step;
      }
    }
  }
  return pTransBitmap;
}

static CFX_DIBitmap* Transform1bppBitmap(const CFX_DIBSource* pSrc,
                                         const CFX_AffineMatrix* pDestMatrix) {
  ASSERT(pSrc->GetFormat() == FXDIB_1bppRgb ||
         pSrc->GetFormat() == FXDIB_1bppMask ||
         pSrc->GetFormat() == FXDIB_1bppCmyk);
  CFX_DIBExtractor src_bitmap(pSrc);
  CFX_DIBitmap* pSrcBitmap = src_bitmap;
  if (pSrcBitmap == NULL) {
    return NULL;
  }
  int src_width = pSrcBitmap->GetWidth(), src_height = pSrcBitmap->GetHeight();
  uint8_t* src_buf = pSrcBitmap->GetBuffer();
  FX_DWORD src_pitch = pSrcBitmap->GetPitch();
  FX_FLOAT dest_area = pDestMatrix->GetUnitArea();
  FX_FLOAT area_scale =
      FXSYS_Div((FX_FLOAT)(src_width * src_height), dest_area);
  FX_FLOAT size_scale = FXSYS_sqrt(area_scale);
  CFX_AffineMatrix adjusted_matrix(*pDestMatrix);
  adjusted_matrix.Scale(size_scale, size_scale);
  CFX_FloatRect result_rect_f = adjusted_matrix.GetUnitRect();
  FX_RECT result_rect = result_rect_f.GetOutterRect();
  CFX_AffineMatrix src2result;
  src2result.e = adjusted_matrix.c + adjusted_matrix.e;
  src2result.f = adjusted_matrix.d + adjusted_matrix.f;
  src2result.a = adjusted_matrix.a / pSrcBitmap->GetWidth();
  src2result.b = adjusted_matrix.b / pSrcBitmap->GetWidth();
  src2result.c = -adjusted_matrix.c / pSrcBitmap->GetHeight();
  src2result.d = -adjusted_matrix.d / pSrcBitmap->GetHeight();
  src2result.TranslateI(-result_rect.left, -result_rect.top);
  CFX_AffineMatrix result2src;
  result2src.SetReverse(src2result);
  CPDF_FixedMatrix result2src_fix(result2src, 8);
  int result_width = result_rect.Width();
  int result_height = result_rect.Height();
  CFX_DIBitmap* pTempBitmap = new CFX_DIBitmap;
  if (!pTempBitmap->Create(result_width, result_height, pSrc->GetFormat())) {
    delete pTempBitmap;
    if (pSrcBitmap != src_bitmap) {
      delete pSrcBitmap;
    }
    return NULL;
  }
  pTempBitmap->CopyPalette(pSrc->GetPalette());
  uint8_t* dest_buf = pTempBitmap->GetBuffer();
  int dest_pitch = pTempBitmap->GetPitch();
  FXSYS_memset(dest_buf, pSrc->IsAlphaMask() ? 0 : 0xff,
               dest_pitch * result_height);
  if (pSrcBitmap->IsAlphaMask()) {
    for (int dest_y = 0; dest_y < result_height; dest_y++) {
      uint8_t* dest_scan = dest_buf + dest_y * dest_pitch;
      for (int dest_x = 0; dest_x < result_width; dest_x++) {
        int src_x, src_y;
        result2src_fix.Transform(dest_x, dest_y, src_x, src_y);
        if (src_x < 0 || src_x >= src_width || src_y < 0 ||
            src_y >= src_height) {
          continue;
        }
        if (!((src_buf + src_pitch * src_y)[src_x / 8] &
              (1 << (7 - src_x % 8)))) {
          continue;
        }
        dest_scan[dest_x / 8] |= 1 << (7 - dest_x % 8);
      }
    }
  } else {
    for (int dest_y = 0; dest_y < result_height; dest_y++) {
      uint8_t* dest_scan = dest_buf + dest_y * dest_pitch;
      for (int dest_x = 0; dest_x < result_width; dest_x++) {
        int src_x, src_y;
        result2src_fix.Transform(dest_x, dest_y, src_x, src_y);
        if (src_x < 0 || src_x >= src_width || src_y < 0 ||
            src_y >= src_height) {
          continue;
        }
        if ((src_buf + src_pitch * src_y)[src_x / 8] & (1 << (7 - src_x % 8))) {
          continue;
        }
        dest_scan[dest_x / 8] &= ~(1 << (7 - dest_x % 8));
      }
    }
  }
  if (pSrcBitmap != src_bitmap) {
    delete pSrcBitmap;
  }
  return pTempBitmap;
}

FX_BOOL CFX_ImageTransformer::Continue(IFX_Pause* pPause)
{
    if (m_Status == 1) {
        if (m_Stretcher.Continue(pPause)) {
            return TRUE;
        }
        if (m_Storer.GetBitmap()) {
            m_Storer.Replace(m_Storer.GetBitmap()->SwapXY(m_pMatrix->c > 0, m_pMatrix->b < 0));
        }
        return FALSE;
    } else if (m_Status == 2) {
        return m_Stretcher.Continue(pPause);
    } else if (m_Status != 3) {
        return FALSE;
    }
    if (m_Stretcher.Continue(pPause)) {
        return TRUE;
    }
    int stretch_width = m_StretchClip.Width();
    int stretch_height = m_StretchClip.Height();
    if (m_Storer.GetBitmap() == NULL) {
        return FALSE;
    }
    FX_LPCBYTE stretch_buf = m_Storer.GetBitmap()->GetBuffer();
    FX_LPCBYTE stretch_buf_mask = NULL;
    if (m_Storer.GetBitmap()->m_pAlphaMask) {
        stretch_buf_mask = m_Storer.GetBitmap()->m_pAlphaMask->GetBuffer();
    }
    int stretch_pitch = m_Storer.GetBitmap()->GetPitch();
    CFX_DIBitmap* pTransformed = FX_NEW CFX_DIBitmap;
    if (!pTransformed) {
        return FALSE;
    }
    FXDIB_Format transformF = _GetTransformedFormat(m_Stretcher.m_pSource);
    if (!pTransformed->Create(m_ResultWidth, m_ResultHeight, transformF)) {
        delete pTransformed;
        return FALSE;
    }
    pTransformed->Clear(0);
    if (pTransformed->m_pAlphaMask) {
        pTransformed->m_pAlphaMask->Clear(0);
    }
    CFX_AffineMatrix result2stretch(1.0f, 0.0f, 0.0f, 1.0f, (FX_FLOAT)(m_ResultLeft), (FX_FLOAT)(m_ResultTop));
    result2stretch.Concat(m_dest2stretch);
    result2stretch.TranslateI(-m_StretchClip.left, -m_StretchClip.top);
    if (stretch_buf_mask == NULL && pTransformed->m_pAlphaMask) {
        pTransformed->m_pAlphaMask->Clear(0xff000000);
    } else if (pTransformed->m_pAlphaMask) {
        int stretch_pitch_mask = m_Storer.GetBitmap()->m_pAlphaMask->GetPitch();
        if (!(m_Flags & FXDIB_DOWNSAMPLE) && !(m_Flags & FXDIB_BICUBIC_INTERPOL)) {
            CFX_BilinearMatrix result2stretch_fix(result2stretch, 8);
            for (int row = 0; row < m_ResultHeight; row ++) {
                FX_BYTE* dest_pos_mask = (FX_BYTE*)pTransformed->m_pAlphaMask->GetScanline(row);
                for (int col = 0; col < m_ResultWidth; col ++) {
                    int src_col_l, src_row_l, res_x, res_y;
                    result2stretch_fix.Transform(col, row, src_col_l, src_row_l, res_x, res_y);
                    if (src_col_l >= 0 && src_col_l <= stretch_width && src_row_l >= 0 && src_row_l <= stretch_height) {
                        if (src_col_l == stretch_width) {
                            src_col_l--;
                        }
                        if (src_row_l == stretch_height) {
                            src_row_l--;
                        }
                        int src_col_r = src_col_l + 1;
                        int src_row_r = src_row_l + 1;
                        if (src_col_r == stretch_width) {
                            src_col_r--;
                        }
                        if (src_row_r == stretch_height) {
                            src_row_r--;
                        }
                        int row_offset_l = src_row_l * stretch_pitch_mask;
                        int row_offset_r = src_row_r * stretch_pitch_mask;
                        *dest_pos_mask = _bilinear_interpol(stretch_buf_mask, row_offset_l, row_offset_r, src_col_l, src_col_r, res_x, res_y, 1, 0);
                    }
                    dest_pos_mask++;
                }
            }
        } else if (m_Flags & FXDIB_BICUBIC_INTERPOL) {
            CFX_BilinearMatrix result2stretch_fix(result2stretch, 8);
            int pos_pixel[8];
            for (int row = 0; row < m_ResultHeight; row ++) {
                FX_BYTE* dest_pos_mask = (FX_BYTE*)pTransformed->m_pAlphaMask->GetScanline(row);
                for (int col = 0; col < m_ResultWidth; col ++) {
                    int src_col_l, src_row_l, res_x, res_y;
                    result2stretch_fix.Transform(col, row, src_col_l, src_row_l, res_x, res_y);
                    if (src_col_l >= 0 && src_col_l <= stretch_width && src_row_l >= 0 && src_row_l <= stretch_height) {
                        int u_w[4], v_w[4];
                        if (src_col_l == stretch_width) {
                            src_col_l--;
                        }
                        if (src_row_l == stretch_height) {
                            src_row_l--;
                        }
                        _bicubic_get_pos_weight(pos_pixel, u_w, v_w, src_col_l, src_row_l, res_x, res_y, stretch_width, stretch_height);
                        *dest_pos_mask = _bicubic_interpol(stretch_buf_mask, stretch_pitch_mask, pos_pixel, u_w, v_w, res_x, res_y, 1, 0);
                    }
                    dest_pos_mask++;
                }
            }
//.........这里部分代码省略.........

//.........这里部分代码省略.........
        status.RenderObjectList(pPattern->m_pForm, &matrix);
        m_pDevice->RestoreState();
      }
    m_pDevice->RestoreState();
    delete pStates;
    return;
  }
  if (bAligned) {
    int orig_x = FXSYS_round(mtPattern2Device.e);
    int orig_y = FXSYS_round(mtPattern2Device.f);
    min_col = (clip_box.left - orig_x) / width;
    if (clip_box.left < orig_x) {
      min_col--;
    }
    max_col = (clip_box.right - orig_x) / width;
    if (clip_box.right <= orig_x) {
      max_col--;
    }
    min_row = (clip_box.top - orig_y) / height;
    if (clip_box.top < orig_y) {
      min_row--;
    }
    max_row = (clip_box.bottom - orig_y) / height;
    if (clip_box.bottom <= orig_y) {
      max_row--;
    }
  }
  FX_FLOAT left_offset = cell_bbox.left - mtPattern2Device.e;
  FX_FLOAT top_offset = cell_bbox.bottom - mtPattern2Device.f;
  CFX_DIBitmap* pPatternBitmap = NULL;
  if (width * height < 16) {
    CFX_DIBitmap* pEnlargedBitmap =
        DrawPatternBitmap(m_pContext->m_pDocument, m_pContext->m_pPageCache,
                          pPattern, pObj2Device, 8, 8, m_Options.m_Flags);
    pPatternBitmap = pEnlargedBitmap->StretchTo(width, height);
    delete pEnlargedBitmap;
  } else {
    pPatternBitmap = DrawPatternBitmap(
        m_pContext->m_pDocument, m_pContext->m_pPageCache, pPattern,
        pObj2Device, width, height, m_Options.m_Flags);
  }
  if (!pPatternBitmap) {
    m_pDevice->RestoreState();
    return;
  }
  if (m_Options.m_ColorMode == RENDER_COLOR_GRAY) {
    pPatternBitmap->ConvertColorScale(m_Options.m_ForeColor,
                                      m_Options.m_BackColor);
  }
  FX_ARGB fill_argb = GetFillArgb(pPageObj);
  int clip_width = clip_box.right - clip_box.left;
  int clip_height = clip_box.bottom - clip_box.top;
  CFX_DIBitmap screen;
  if (!screen.Create(clip_width, clip_height, FXDIB_Argb)) {
    return;
  }
  screen.Clear(0);
  FX_DWORD* src_buf = (FX_DWORD*)pPatternBitmap->GetBuffer();
  for (int col = min_col; col <= max_col; col++) {
    for (int row = min_row; row <= max_row; row++) {
      int start_x, start_y;
      if (bAligned) {
        start_x = FXSYS_round(mtPattern2Device.e) + col * width - clip_box.left;
        start_y = FXSYS_round(mtPattern2Device.f) + row * height - clip_box.top;
      } else {
        FX_FLOAT orig_x = col * pPattern->m_XStep;
        FX_FLOAT orig_y = row * pPattern->m_YStep;
        mtPattern2Device.Transform(orig_x, orig_y);
        start_x = FXSYS_round(orig_x + left_offset) - clip_box.left;
        start_y = FXSYS_round(orig_y + top_offset) - clip_box.top;
      }
      if (width == 1 && height == 1) {
        if (start_x < 0 || start_x >= clip_box.Width() || start_y < 0 ||
            start_y >= clip_box.Height()) {
          continue;
        }
        FX_DWORD* dest_buf =
            (FX_DWORD*)(screen.GetBuffer() + screen.GetPitch() * start_y +
                        start_x * 4);
        if (pPattern->m_bColored) {
          *dest_buf = *src_buf;
        } else {
          *dest_buf = (*(uint8_t*)src_buf << 24) | (fill_argb & 0xffffff);
        }
      } else {
        if (pPattern->m_bColored) {
          screen.CompositeBitmap(start_x, start_y, width, height,
                                 pPatternBitmap, 0, 0);
        } else {
          screen.CompositeMask(start_x, start_y, width, height, pPatternBitmap,
                               fill_argb, 0, 0);
        }
      }
    }
  }
  CompositeDIBitmap(&screen, clip_box.left, clip_box.top, 0, 255,
                    FXDIB_BLEND_NORMAL, FALSE);
  m_pDevice->RestoreState();
  delete pPatternBitmap;
}

CFX_DIBitmap* CPDF_RenderStatus::LoadSMask(CPDF_Dictionary* pSMaskDict,
        FX_RECT* pClipRect, const CFX_AffineMatrix* pMatrix)
{
    if (pSMaskDict == NULL) {
        return NULL;
    }
    CFX_DIBitmap* pMask = NULL;
    int width = pClipRect->right - pClipRect->left;
    int height = pClipRect->bottom - pClipRect->top;
    FX_BOOL bLuminosity = FALSE;
    bLuminosity = pSMaskDict->GetConstString(FX_BSTRC("S")) != FX_BSTRC("Alpha");
    CPDF_Stream* pGroup = pSMaskDict->GetStream(FX_BSTRC("G"));
    if (pGroup == NULL) {
        return NULL;
    }
    CPDF_Function* pFunc = NULL;
    CPDF_Object* pFuncObj = pSMaskDict->GetElementValue(FX_BSTRC("TR"));
    if (pFuncObj && (pFuncObj->GetType() == PDFOBJ_DICTIONARY || pFuncObj->GetType() == PDFOBJ_STREAM)) {
        pFunc = CPDF_Function::Load(pFuncObj);
    }
    CFX_AffineMatrix matrix = *pMatrix;
    matrix.TranslateI(-pClipRect->left, -pClipRect->top);
    CPDF_Form form(m_pContext->m_pDocument, m_pContext->m_pPageResources, pGroup);
    form.ParseContent(NULL, NULL, NULL, NULL);
    CFX_FxgeDevice bitmap_device;
#if _FXM_PLATFORM_  == _FXM_PLATFORM_APPLE_
    if (!bitmap_device.Create(width, height, bLuminosity ? FXDIB_Rgb32 : FXDIB_8bppMask)) {
        return NULL;
    }
#else
    if (!bitmap_device.Create(width, height, bLuminosity ? FXDIB_Rgb : FXDIB_8bppMask)) {
        return NULL;
    }
#endif
    CFX_DIBitmap& bitmap = *bitmap_device.GetBitmap();
    CPDF_Object* pCSObj = NULL;
    CPDF_ColorSpace* pCS = NULL;
    if (bLuminosity) {
        CPDF_Array* pBC = pSMaskDict->GetArray(FX_BSTRC("BC"));
        FX_ARGB back_color = 0xff000000;
        if (pBC) {
            pCSObj = pGroup->GetDict()->GetDict(FX_BSTRC("Group"))->GetElementValue(FX_BSTRC("CS"));
            pCS = m_pContext->m_pDocument->LoadColorSpace(pCSObj);
            if (pCS) {
                FX_FLOAT R, G, B;
                FX_DWORD num_floats = 8;
                if (pCS->CountComponents() > (FX_INT32)num_floats) {
                    num_floats = (FX_DWORD)pCS->CountComponents();
                }
                CFX_FixedBufGrow<FX_FLOAT, 8> float_array(num_floats);
                FX_FLOAT* pFloats = float_array;
                FXSYS_memset32(pFloats, 0, num_floats * sizeof(FX_FLOAT));
                int count = pBC->GetCount() > 8 ? 8 : pBC->GetCount();
                for (int i = 0; i < count; i ++) {
                    pFloats[i] = pBC->GetNumber(i);
                }
                pCS->GetRGB(pFloats, R, G, B);
                back_color = 0xff000000 | ((FX_INT32)(R * 255) << 16) | ((FX_INT32)(G * 255) << 8) | (FX_INT32)(B * 255);
                m_pContext->m_pDocument->GetPageData()->ReleaseColorSpace(pCSObj);
            }
        }
        bitmap.Clear(back_color);
    } else {
        bitmap.Clear(0);
    }
    CPDF_Dictionary* pFormResource = NULL;
    if (form.m_pFormDict) {
        pFormResource = form.m_pFormDict->GetDict(FX_BSTRC("Resources"));
    }
    CPDF_RenderOptions options;
    options.m_ColorMode = bLuminosity ? RENDER_COLOR_NORMAL : RENDER_COLOR_ALPHA;
    CPDF_RenderStatus status;
    status.Initialize(m_Level + 1, m_pContext, &bitmap_device, NULL, NULL, NULL, NULL,
                      &options, 0, m_bDropObjects, pFormResource, TRUE, NULL, 0, pCS ? pCS->GetFamily() : 0, bLuminosity);
    status.RenderObjectList(&form, &matrix);
    pMask = FX_NEW CFX_DIBitmap;
    if (!pMask->Create(width, height, FXDIB_8bppMask)) {
        delete pMask;
        return NULL;
    }
    FX_LPBYTE dest_buf = pMask->GetBuffer();
    int dest_pitch = pMask->GetPitch();
    FX_LPBYTE src_buf = bitmap.GetBuffer();
    int src_pitch = bitmap.GetPitch();
    FX_LPBYTE pTransfer = FX_Alloc(FX_BYTE, 256);
    if (pFunc) {
        CFX_FixedBufGrow<FX_FLOAT, 16> results(pFunc->CountOutputs());
        for (int i = 0; i < 256; i ++) {
            FX_FLOAT input = (FX_FLOAT)i / 255.0f;
            int nresult;
            pFunc->Call(&input, 1, results, nresult);
            pTransfer[i] = FXSYS_round(results[0] * 255);
        }
    } else {
        for (int i = 0; i < 256; i ++) {
            pTransfer[i] = i;
        }
    }
    if (bLuminosity) {
        int Bpp = bitmap.GetBPP() / 8;
//.........这里部分代码省略.........

DLLEXPORT FPDF_BITMAP STDCALL FPDFBitmap_Create(int width, int height, int alpha)
{
    CFX_DIBitmap* pBitmap = FX_NEW CFX_DIBitmap;
    pBitmap->Create(width, height, alpha ? FXDIB_Argb : FXDIB_Rgb32);
    return pBitmap;
}

DLLEXPORT void STDCALL FPDF_RenderPage(HDC dc, FPDF_PAGE page, int start_x, int start_y, int size_x, int size_y,
                                       int rotate, int flags)
{
    if (page==NULL) return;
    CPDF_Page* pPage = (CPDF_Page*)page;

    CRenderContext* pContext = FX_NEW CRenderContext;
    pPage->SetPrivateData((void*)1, pContext, DropContext);

#ifndef _WIN32_WCE
    CFX_DIBitmap* pBitmap = NULL;
    FX_BOOL bBackgroundAlphaNeeded=FALSE;
    bBackgroundAlphaNeeded = pPage->BackgroundAlphaNeeded();
    if (bBackgroundAlphaNeeded)
    {

        pBitmap = FX_NEW CFX_DIBitmap;
        pBitmap->Create(size_x, size_y, FXDIB_Argb);
        pBitmap->Clear(0x00ffffff);
#ifdef _SKIA_SUPPORT_
        pContext->m_pDevice = FX_NEW CFX_SkiaDevice;
        ((CFX_SkiaDevice*)pContext->m_pDevice)->Attach((CFX_DIBitmap*)pBitmap);
#else
        pContext->m_pDevice = FX_NEW CFX_FxgeDevice;
        ((CFX_FxgeDevice*)pContext->m_pDevice)->Attach((CFX_DIBitmap*)pBitmap);
#endif
    }
    else
        pContext->m_pDevice = FX_NEW CFX_WindowsDevice(dc);
    if (flags & FPDF_NO_CATCH)
        Func_RenderPage(pContext, page, start_x, start_y, size_x, size_y, rotate, flags,TRUE,NULL);
    else {
        try {
            Func_RenderPage(pContext, page, start_x, start_y, size_x, size_y, rotate, flags,TRUE,NULL);
        } catch (...) {
        }
    }
    if (bBackgroundAlphaNeeded)
    {
        if (pBitmap)
        {
            CFX_WindowsDevice WinDC(dc);

            if (WinDC.GetDeviceCaps(FXDC_DEVICE_CLASS) == FXDC_PRINTER)
            {
                CFX_DIBitmap* pDst = FX_NEW CFX_DIBitmap;
                pDst->Create(pBitmap->GetWidth(), pBitmap->GetHeight(),FXDIB_Rgb32);
                FXSYS_memcpy(pDst->GetBuffer(), pBitmap->GetBuffer(), pBitmap->GetPitch()*pBitmap->GetHeight());
//				WinDC.SetDIBits(pDst,0,0);
                WinDC.StretchDIBits(pDst,0,0,size_x*2,size_y*2);
                delete pDst;
            }
            else
                WinDC.SetDIBits(pBitmap,0,0);

        }
    }
#else
    // get clip region
    RECT rect, cliprect;
    rect.left = start_x;
    rect.top = start_y;
    rect.right = start_x + size_x;
    rect.bottom = start_y + size_y;
    GetClipBox(dc, &cliprect);
    IntersectRect(&rect, &rect, &cliprect);
    int width = rect.right - rect.left;
    int height = rect.bottom - rect.top;

#ifdef DEBUG_TRACE
    {
        char str[128];
        sprintf(str, "Rendering DIB %d x %d", width, height);
        CPDF_ModuleMgr::Get()->ReportError(999, str);
    }
#endif

    // Create a DIB section
    LPVOID pBuffer;
    BITMAPINFOHEADER bmih;
    FXSYS_memset(&bmih, 0, sizeof bmih);
    bmih.biSize = sizeof bmih;
    bmih.biBitCount = 24;
    bmih.biHeight = -height;
    bmih.biPlanes = 1;
    bmih.biWidth = width;
    pContext->m_hBitmap = CreateDIBSection(dc, (BITMAPINFO*)&bmih, DIB_RGB_COLORS, &pBuffer, NULL, 0);
    if (pContext->m_hBitmap == NULL) {
#if defined(DEBUG) || defined(_DEBUG)
        char str[128];
        sprintf(str, "Error CreateDIBSection: %d x %d, error code = %d", width, height, GetLastError());
        CPDF_ModuleMgr::Get()->ReportError(FPDFERR_OUT_OF_MEMORY, str);
#else
        CPDF_ModuleMgr::Get()->ReportError(FPDFERR_OUT_OF_MEMORY, NULL);
#endif
    }
    FXSYS_memset(pBuffer, 0xff, height*((width*3+3)/4*4));

#ifdef DEBUG_TRACE
    {
//.........这里部分代码省略.........