/// <summary>
/// Renders the first page of a PDF document from a stream.
/// </summary>
/// <param name="stream"></param>
/// <param name="renderWidth"></param>
/// <returns></returns>
public static async Task <BitmapImage> RenderFirstPageFromStream(IRandomAccessStream stream, uint renderWidth)
{
PdfModelMS msPdf = new PdfModelMS();
msPdf.PdfDoc = await PdfDocument.LoadFromStreamAsync(stream);
return(await msPdf.RenderPageImage(1, renderWidth));
}
/// <summary>
/// Renders a page as image in the memory.
/// </summary>
/// <param name="pageNumber">1-based page number.</param>
/// <param name="renderWidth">Width of the image.</param>
/// <returns></returns>
public async Task <BitmapImage> RenderPageImage(int pageNumber, uint renderWidth)
{
// Load exiting annotations
if (sfPdf.AnnotationCount(pageNumber) == 0)
{
return(await msPdf.RenderPageImage(pageNumber, renderWidth));
}
else
{
MemoryStream stream = sfPdf.ExtractPageWithoutInking(pageNumber);
return(await PdfModelMS.RenderFirstPageFromStream(stream.AsRandomAccessStream(), renderWidth));
}
}
