public static bool GetRotInfo(FileInfo fi, out ushort rotateme)
{
bool gotRotInfo = false;
rotateme = 1;
FIBITMAP?dibNull = GetJPGImageHandle(fi);
if (dibNull != null)
{
FIBITMAP dib = (FIBITMAP)dibNull;
var iMetadata = new ImageMetadata(dib);
MetadataModel exifMain = iMetadata[FREE_IMAGE_MDMODEL.FIMD_EXIF_MAIN];
if (exifMain != null)
{
MetadataTag orientationTag = exifMain.GetTag("Orientation");
if (orientationTag != null)
{
var rotInfo = (ushort[])orientationTag.Value;
rotateme = rotInfo[0];
gotRotInfo = true;
}
}
CleanUpResources(dib);
}
return(gotRotInfo);
}
/// <summary>
/// get the rotation info
/// </summary>
/// <param name="dib"></param>
/// <returns></returns>
public static ushort GetRotateInfo(FIBITMAP dib)
{
ushort rotateme = 1;
var iMetadata = new ImageMetadata(dib);
MetadataModel exifMain = iMetadata[FREE_IMAGE_MDMODEL.FIMD_EXIF_MAIN];
if (exifMain != null)
{
MetadataTag orientationTag = exifMain.GetTag("Orientation");
if (orientationTag != null)
{
var rotInfo = (ushort[])orientationTag.Value;
if (rotInfo != null && rotInfo.Length > 0)
{
rotateme = rotInfo[0];
}
}
}
return(rotateme);
}
/// <summary>
/// set the rotation info
/// </summary>
/// <remarks>FREEIMAGE (until 3.11) does not support writing of metadata!!!!!!!!!</remarks>
/// <param name="dib"></param>
/// <param name="rotInfo"></param>
/// <returns>if the value was changed</returns>
public static bool SetRotateInfo(FIBITMAP dib, ushort rotInfo)
{
bool changed = false;
var iMetadata = new ImageMetadata(dib);
MetadataModel exifMain = iMetadata[FREE_IMAGE_MDMODEL.FIMD_EXIF_MAIN];
if (exifMain != null)
{
MetadataTag orientationTag = exifMain.GetTag("Orientation");
if (orientationTag != null)
{
var nuval = new[] { rotInfo };
if (orientationTag.Value != nuval)
{
orientationTag.SetValue(nuval);
changed = true;
}
}
}
return(changed);
}