Hi,
I scan a folder containing a lot of image files and I show a list
of preview
of each image file contents. I read each image file with
[[NSImage alloc] initWithContentsOfFile:filePath];
Of course if the folder contains a lot of image files and/or the
image files
are huge (GBs), this task takes a lot of time. So I ask, is a way
to get
quickly a preview of the image file (if any already embedded into
the image
file)? I link to SDK 10.4, not yet Leopard.
You want to use the functions in CGImageSource.h. Specifically,
create a CGImageSource from an image file and then create a thumbnail
from that image source. For most image types, this is much more
efficient than decoding the entire file and scaling it down.
-Peter
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