/// <summary>
/// this works on URLs only if a photoDescr has been cached before, and on locals - always
/// </summary>
/// <param name="thumbSource"></param>
/// <returns></returns>
public static PhotoDescr FromThumbnail(string thumbSource)
{
PhotoDescr photoDescr = null;
if (thumbSource.StartsWith("http://"))
{
photoDescr = PhotoDescr.FromSmugmugThumbnail(thumbSource);
}
else
{
photoDescr = PhotoDescr.FromFileOrZipEntry(null, null, thumbSource, null);
}
return(photoDescr);
}
public static Image rebuildThumbnailImage(string thumbSource)
{
Image ret = null;
if (thumbSource.ToLower().StartsWith("http://"))
{
// a gallery, and actual URL of the thumbnail
ret = ImageCache.getImage(thumbSource, true);
}
else
{
// local file, containing large image.
PhotoDescr pd = PhotoDescr.FromFileOrZipEntry(null, null, thumbSource, "none");
float imageRatio = (float)pd.image.Width / (float)pd.image.Height;
float panelRatio = (float)Project.thumbWidth / (float)Project.thumbHeight;
int thumbWidth;
int thumbHeight;
if (imageRatio > panelRatio) // image wider
{
thumbWidth = Project.thumbWidth;
thumbHeight = (int)(thumbWidth / imageRatio);
}
else
{
thumbHeight = Project.thumbHeight;
thumbWidth = (int)(thumbHeight * imageRatio);
}
// make a thumbnail bitmap:
Bitmap thumb = new Bitmap(pd.image, new Size(thumbWidth, thumbHeight));
// the following produces ugly big unfocused thumbnail, so we stay with Bitmap for now:
//Image thumb = photoDescr.image.GetThumbnailImage(Project.thumbWidth, Project.thumbHeight, null, IntPtr.Zero);
// rotate thumbnail based on photoDescr.Orientation.
switch (pd.Orientation)
{
// see PhotoDescr.cs for EXIF orientation codes:
case 4:
thumb.RotateFlip(RotateFlipType.Rotate180FlipNone);
break;
case 8:
thumb.RotateFlip(RotateFlipType.Rotate270FlipNone);
break;
case 6:
thumb.RotateFlip(RotateFlipType.Rotate90FlipNone);
break;
}
if (thumbSource.IndexOf("|") != -1)
{
ImageCache.putImage(thumb, thumbSource, null, true); // zipfile - putImage() will generate local temp file
}
else
{
ImageCache.putImage(thumb, thumbSource, thumbSource, true);
}
ret = thumb;
pd.releaseImage();
}
return(ret);
}