Fastest way to resize an image?
Fastest way to resize an image?
- Subject: Fastest way to resize an image?
- From: Jean-Nicolas Jolivet <email@hidden>
- Date: Thu, 20 Nov 2008 01:30:50 -0500
I have a bunch of images to resize... they are located on the HD so
they can be loaded in an NSImage or a BitmapImageRep or pretty much
any way I'd like (CIImage, CGImage are possibilities I guess), however
I found out that just using the setSize: method of NSImage was
unreliable (since basically NSImage is just a "container" for
NSImageReps and such... I was getting unreliable results with certain
images)...
anyway, right now I am loading an NSBitmapImageRep with the
imageRepFromFile: method... then creating a new, empty NSImage based
on the image size that I want to resize to (using initWithSize:) and I
draw the BitmapImageRep on this image (while the focus is locked on
the NSImage)...
This works well and yields reliable results, however the process is
quite slow with bigger images... if I have say 20-30 images to resize
it can take almost a minute... I was wondering if there was a faster
way to achieve the same result (while still getting reliable
results... ). One thing that I have to consider is that I am adding a
border to the images so I might have no other choice but to actually
"draw" them somewhere in the process... but is there something faster
than NSImage/NSImageRep to work with?
Any help/pointers would be appreciated... basically I can already do
what I want to do, just looking for the fastest way to do it...
Jean-Nicolas Jolivet
email@hidden
http://www.silverscripting.com
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