Load a TIFF from a stream in C#

TIFF

To load a TIFF image from a Stream, use the CreateGdPictureImageFromStream method from the GdPictureImaging class.

This method returns a non-zero GdPicture image identifier (imageID) on success. If it fails, it returns 0 — use GetStat() to view the failure reason.

For TIFF stream input, use the overload with explicit format:

CreateGdPictureImageFromStream(Stream, DocumentFormat ImageFormat)

If the TIFF contains multiple pages, you can use:

Remember to release image resources with the ReleaseGdPictureImage method.

To load a TIFF image from a stream, use the following code:

using GdPicture14;
using System;
using System.IO;


using GdPictureImaging gdpictureImaging = new GdPictureImaging();


// Create a stream object from a TIFF file.
using Stream streamImage = new FileStream(@"C:\temp\source.tif", FileMode.Open, FileAccess.Read);


// Create a GdPicture image from the stream object.
int imageID = gdpictureImaging.CreateGdPictureImageFromStream(
    streamImage,
    DocumentFormat.DocumentFormatTIFF);


if (imageID == 0)
{
    Console.WriteLine($"CreateGdPictureImageFromStream failed: {gdpictureImaging.GetStat()}");
    return;
}


int pageCount = gdpictureImaging.TiffGetPageCount(imageID);
if (pageCount > 1)
{
    GdPictureStatus selectStatus = gdpictureImaging.TiffSelectPage(imageID, 1);
    if (selectStatus != GdPictureStatus.OK)
    {
        Console.WriteLine($"TiffSelectPage failed: {selectStatus}");
        gdpictureImaging.ReleaseGdPictureImage(imageID);
        return;
    }
}


GdPictureStatus saveStatus = gdpictureImaging.SaveAsPNG(imageID, @"C:\temp\output.png");
if (saveStatus != GdPictureStatus.OK)
{
    Console.WriteLine($"SaveAsPNG failed: {saveStatus}");
}


gdpictureImaging.ReleaseGdPictureImage(imageID);