C++ CPDF_Page::RemovePrivateData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 void STDCALL FPDF_RenderPage_Close(FPDF_PAGE page) {
  CPDF_Page* pPage = CPDFPageFromFPDFPage(page);
  if (!pPage)
    return;

  CRenderContext* pContext = (CRenderContext*)pPage->GetPrivateData((void*)1);
  if (!pContext)
    return;

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

DLLEXPORT void STDCALL FPDF_RenderPage_Close(FPDF_PAGE page)
{
	if (page == NULL) return;
	CPDF_Page* pPage = (CPDF_Page*)page;

//	FXMT_CSLOCK_OBJ(&pPage->m_PageLock);

	CRenderContext * pContext = (CRenderContext*)pPage->GetPrivateData((void*)1);
	if (pContext)
	{
		pContext->m_pDevice->RestoreState();
		delete pContext;
		pPage->RemovePrivateData((void*)1);
	}
}

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;
}

//.........这里部分代码省略.........
    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
    {
        CPDF_ModuleMgr::Get()->ReportError(999, "DIBSection created");
    }
#endif

    // Create a device with this external buffer
    pContext->m_pBitmap = FX_NEW CFX_DIBitmap;
    pContext->m_pBitmap->Create(width, height, FXDIB_Rgb, (FX_LPBYTE)pBuffer);
    pContext->m_pDevice = FX_NEW CPDF_FxgeDevice;
    ((CPDF_FxgeDevice*)pContext->m_pDevice)->Attach(pContext->m_pBitmap);

#ifdef DEBUG_TRACE
    CPDF_ModuleMgr::Get()->ReportError(999, "Ready for PDF rendering");
#endif

    // output to bitmap device
    if (flags & FPDF_NO_CATCH)
        Func_RenderPage(pContext, page, start_x - rect.left, start_y - rect.top, size_x, size_y, rotate, flags);
    else {
        try {
            Func_RenderPage(pContext, page, start_x - rect.left, start_y - rect.top, size_x, size_y, rotate, flags);
        } catch (...) {
        }
    }

#ifdef DEBUG_TRACE
    CPDF_ModuleMgr::Get()->ReportError(999, "Finished PDF rendering");
#endif

    // Now output to real device
    HDC hMemDC = CreateCompatibleDC(dc);
    if (hMemDC == NULL) {
#if defined(DEBUG) || defined(_DEBUG)
        char str[128];
        sprintf(str, "Error CreateCompatibleDC. Error code = %d", GetLastError());
        CPDF_ModuleMgr::Get()->ReportError(FPDFERR_OUT_OF_MEMORY, str);
#else
        CPDF_ModuleMgr::Get()->ReportError(FPDFERR_OUT_OF_MEMORY, NULL);
#endif
    }

    HGDIOBJ hOldBitmap = SelectObject(hMemDC, pContext->m_hBitmap);

#ifdef DEBUG_TRACE
    CPDF_ModuleMgr::Get()->ReportError(999, "Ready for screen rendering");
#endif

    BitBlt(dc, rect.left, rect.top, width, height, hMemDC, 0, 0, SRCCOPY);
    SelectObject(hMemDC, hOldBitmap);
    DeleteDC(hMemDC);

#ifdef DEBUG_TRACE
    CPDF_ModuleMgr::Get()->ReportError(999, "Finished screen rendering");
#endif

#endif
    if (bBackgroundAlphaNeeded)
    {
        if (pBitmap)
            delete pBitmap;
        pBitmap = NULL;
    }
    delete pContext;
    pPage->RemovePrivateData((void*)1);
}