public static Image getImage(string source, bool isThumb)
{
ImageStorage ret = null;
if (isThumb)
{
// if thumbnail size has changed, invalidate that portion of the cache:
if (Project.thumbWidth != Project_thumbWidth || Project.thumbHeight != Project_thumbHeight)
{
m_imagesThumb.Clear();
Project_thumbWidth = Project.thumbWidth;
Project_thumbHeight = Project.thumbHeight;
}
if ((ret = (ImageStorage)m_imagesThumb[source]) == null)
{
if (source.ToLower().StartsWith("http://"))
{
// Create an Image object from the source - thumbnail URL.
string fileName;
Image img = getImageByURL(source, out fileName);
// make a thumbnail bitmap:
Bitmap thumb = new Bitmap(img, new Size(Project.thumbWidth, Project.thumbHeight));
ImageCache.putImage(thumb, source, fileName, true);
return(thumb);
}
else
{
// we need to know image Orientation to create a thumbnail from file.
// it means that creating the thumbnail must be handled in PhotoDescr rather than here.
// will return null later.
}
}
}
else
{
// source is either a file name (including isnide a zipfile) or a URL - size dependent.
if ((ret = (ImageStorage)m_images[source]) == null)
{
if (source.ToLower().StartsWith("http://"))
{
// Create an Image object from the source - thumbnail URL.
string fileName;
Image img = getImageByURL(source, out fileName);
ImageCache.putImage(img, source, fileName, false);
return(img);
}
// else handled in PhotoDescr
}
}
if (ret == null)
{
// happens for local-source images which we don't want to deal with here
return(null);
}
// found container, return contained:
return(ret.getImage(isThumb));
}
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);
}
