C++ CPDF_Page::SetPrivateData方法代码示例

DLLEXPORT void STDCALL FPDF_RenderPageBitmap(FPDF_BITMAP bitmap, FPDF_PAGE page, int start_x, int start_y,
						int size_x, int size_y, int rotate, int flags)
{
	if (bitmap == NULL || page == NULL) return;
	CPDF_Page* pPage = (CPDF_Page*)page;


	CRenderContext* pContext = new CRenderContext;
	pPage->SetPrivateData((void*)1, pContext, DropContext);
#ifdef _SKIA_SUPPORT_
	pContext->m_pDevice = new CFX_SkiaDevice;

	if (flags & FPDF_REVERSE_BYTE_ORDER)
		((CFX_SkiaDevice*)pContext->m_pDevice)->Attach((CFX_DIBitmap*)bitmap,0,TRUE);
	else
		((CFX_SkiaDevice*)pContext->m_pDevice)->Attach((CFX_DIBitmap*)bitmap);
#else
	pContext->m_pDevice = new CFX_FxgeDevice;

	if (flags & FPDF_REVERSE_BYTE_ORDER)
		((CFX_FxgeDevice*)pContext->m_pDevice)->Attach((CFX_DIBitmap*)bitmap,0,TRUE);
	else
		((CFX_FxgeDevice*)pContext->m_pDevice)->Attach((CFX_DIBitmap*)bitmap);
#endif

	Func_RenderPage(pContext, page, start_x, start_y, size_x, size_y, rotate, flags,TRUE,NULL);

	delete pContext;
	pPage->RemovePrivateData((void*)1);
}

DLLEXPORT int STDCALL FPDF_RenderPageBitmap_Start(FPDF_BITMAP bitmap,
                                                  FPDF_PAGE page,
                                                  int start_x,
                                                  int start_y,
                                                  int size_x,
                                                  int size_y,
                                                  int rotate,
                                                  int flags,
                                                  IFSDK_PAUSE* pause) {
  if (!bitmap || !pause || pause->version != 1)
    return FPDF_RENDER_FAILED;

  CPDF_Page* pPage = CPDFPageFromFPDFPage(page);
  if (!pPage)
    return FPDF_RENDER_FAILED;

  CRenderContext* pContext = new CRenderContext;
  pPage->SetPrivateData((void*)1, pContext, DropContext);
#ifdef _SKIA_SUPPORT_
  pContext->m_pDevice = new CFX_SkiaDevice;
  if (flags & FPDF_REVERSE_BYTE_ORDER)
    ((CFX_SkiaDevice*)pContext->m_pDevice)
        ->Attach((CFX_DIBitmap*)bitmap, 0, TRUE);
  else
    ((CFX_SkiaDevice*)pContext->m_pDevice)->Attach((CFX_DIBitmap*)bitmap);
#else
  pContext->m_pDevice = new CFX_FxgeDevice;
  if (flags & FPDF_REVERSE_BYTE_ORDER)
    ((CFX_FxgeDevice*)pContext->m_pDevice)
        ->Attach((CFX_DIBitmap*)bitmap, 0, TRUE);
  else
    ((CFX_FxgeDevice*)pContext->m_pDevice)->Attach((CFX_DIBitmap*)bitmap);
#endif
  IFSDK_PAUSE_Adapter IPauseAdapter(pause);

  FPDF_RenderPage_Retail(pContext, page, start_x, start_y, size_x, size_y,
                         rotate, flags, FALSE, &IPauseAdapter);

  if (pContext->m_pRenderer)
    return CPDF_ProgressiveRenderer::ToFPDFStatus(
        pContext->m_pRenderer->GetStatus());

  return FPDF_RENDER_FAILED;
}

static void renderPageBitmap(FPDF_BITMAP bitmap, FPDF_PAGE page, int destLeft, int destTop,
        int destRight, int destBottom, SkMatrix* transform, int flags) {
    // Note: this code ignores the currently unused RENDER_NO_NATIVETEXT,
    // FPDF_RENDER_LIMITEDIMAGECACHE, FPDF_RENDER_FORCEHALFTONE, FPDF_GRAYSCALE,
    // and FPDF_ANNOT flags. To add support for that refer to FPDF_RenderPage_Retail
    // in fpdfview.cpp

    CRenderContext* pContext = FX_NEW CRenderContext;

    CPDF_Page* pPage = (CPDF_Page*) page;
    pPage->SetPrivateData((void*) 1, pContext, DropContext);

    CFX_FxgeDevice* fxgeDevice = FX_NEW CFX_FxgeDevice;
    pContext->m_pDevice = fxgeDevice;

    // Reverse the bytes (last argument TRUE) since the Android
    // format is ARGB while the renderer uses BGRA internally.
    fxgeDevice->Attach((CFX_DIBitmap*) bitmap, 0, TRUE);

    CPDF_RenderOptions* renderOptions = pContext->m_pOptions;

    if (!renderOptions) {
        renderOptions = FX_NEW CPDF_RenderOptions;
        pContext->m_pOptions = renderOptions;
    }

    if (flags & FPDF_LCD_TEXT) {
        renderOptions->m_Flags |= RENDER_CLEARTYPE;
    } else {
        renderOptions->m_Flags &= ~RENDER_CLEARTYPE;
    }

    const CPDF_OCContext::UsageType usage = (flags & FPDF_PRINTING)
            ? CPDF_OCContext::Print : CPDF_OCContext::View;

    renderOptions->m_AddFlags = flags >> 8;
    renderOptions->m_pOCContext = new CPDF_OCContext(pPage->m_pDocument, usage);

    fxgeDevice->SaveState();

    FX_RECT clip;
    clip.left = destLeft;
    clip.right = destRight;
    clip.top = destTop;
    clip.bottom = destBottom;
    fxgeDevice->SetClip_Rect(&clip);

    CPDF_RenderContext* pageContext = FX_NEW CPDF_RenderContext;
    pContext->m_pContext = pageContext;
    pageContext->Create(pPage);

    CFX_AffineMatrix matrix;
    if (!transform) {
        pPage->GetDisplayMatrix(matrix, destLeft, destTop, destRight - destLeft,
                destBottom - destTop, 0);
    } else {
        // PDF's coordinate system origin is left-bottom while
        // in graphics it is the top-left, so remap the origin.
        matrix.Set(1, 0, 0, -1, 0, pPage->GetPageHeight());

        SkScalar transformValues[6];
        transform->asAffine(transformValues);

        matrix.Concat(transformValues[SkMatrix::kAScaleX], transformValues[SkMatrix::kASkewY],
                transformValues[SkMatrix::kASkewX], transformValues[SkMatrix::kAScaleY],
                transformValues[SkMatrix::kATransX], transformValues[SkMatrix::kATransY]);
    }
    pageContext->AppendObjectList(pPage, &matrix);

    pContext->m_pRenderer = FX_NEW CPDF_ProgressiveRenderer;
    pContext->m_pRenderer->Start(pageContext, fxgeDevice, renderOptions, NULL);

    fxgeDevice->RestoreState();

    pPage->RemovePrivateData((void*) 1);

    delete pContext;
}

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.........