/// <summary>
/// Gets rescaling factor for native width x height of the page
/// so it maximizes the dimOne x dimTwo rectangle
/// </summary>
/// <param name="page">Page object</param>
/// <param name="dimOne">Smaller dimension</param>
/// <param name="dimTwo">Larger dimension</param>
/// <returns>Scaling factor</returns>
private static double GetScalingFactor(FpdfPageT page, int dimOne, int dimTwo)
{
var width = fpdf_view.FPDF_GetPageWidth(page);
var height = fpdf_view.FPDF_GetPageHeight(page);
var scaleOne = dimOne / Math.Min(width, height);
var scalingTwo = dimTwo / Math.Max(width, height);
return(Math.Min(scaleOne, scalingTwo));
}
internal static int FPDFImageObjLoadJpegFile(FpdfPageT pages, int nCount, FpdfPageobjectT image_object, FileHandle fileAccess)
{
unsafe
{
var array = new[] { pages.__Instance };
fixed(IntPtr *dataPtr = &array[0])
{
return(FPDFImageObjLoadJpegFileInternal(dataPtr, nCount, image_object.__Instance, fileAccess));
}
}
}
public RenderPageAction(ThreadDispatcher dispatcher,
FpdfPageT pageInstance,
float scale,
RectangleF viewport,
RenderFlags flags,
Color?backgroundColor)
{
_pageInstance = pageInstance;
_scale = scale;
_viewport = viewport;
_flags = flags;
_backgroundColor = backgroundColor;
_dispatcher = dispatcher;
}
/// <summary>
/// Gets rescaling factor for native width x height of the page
/// so it maximizes the dimOne x dimTwo rectangle
///
/// Note: make sure that the semaphore is locked before access.
/// </summary>
/// <param name="page">Page object.</param>
/// <returns>Scaling factor.</returns>
internal double GetScalingFactor(FpdfPageT page)
{
if (_scalingFactor != null)
{
return(_scalingFactor.Value);
}
var width = fpdf_view.FPDF_GetPageWidth(page);
var height = fpdf_view.FPDF_GetPageHeight(page);
var scaleOne = DimOne / Math.Min(width, height);
var scalingTwo = DimTwo / Math.Max(width, height);
return(Math.Min(scaleOne, scalingTwo));
}
public PageReader(DocumentWrapper docWrapper, int pageIndex, PageDimensions pageDimensions)
{
PageIndex = pageIndex;
lock (DocLib.Lock)
{
_page = fpdf_view.FPDF_LoadPage(docWrapper.Instance, pageIndex);
if (_page == null)
{
throw new DocnetException($"failed to open page for page index {pageIndex}");
}
_text = fpdf_text.FPDFTextLoadPage(_page);
if (_text == null)
{
throw new DocnetException($"failed to open page text for page index {pageIndex}");
}
_scaling = pageDimensions.GetScalingFactor(_page);
}
}
private PdfPage(ThreadDispatcher dispatcher, FpdfDocumentT documentInstance, FpdfPageT pageInstance)
{
_dispatcher = dispatcher;
_documentInstance = documentInstance;
_pageInstance = pageInstance;
}