Depending on what you are going to do with the "sub-images" once you
create them, you might want to consider using a CIImage with the
CICrop core image filter.
On Jun 21, 2008, at 9:41 AM, Dharmendra wrote:
Hi,
I am trying to get a user-defined image in specific format (m x nm)
and want
to generate an array with count n containing m x m sized images. I
have
written the following code, but would like to know if there is
better way to
do the same:
m=...;
NSImage *userImage=[[NSImage alloc]
initWithContentsOfFile:@"xxx.gif"];
unsigned int n=[userImage size].width/m;
NSMutableArray *images = [NSMutableArray arrayWithCapacity:n];
for(i=0;i<n;i++) {
NSImage *testImage=[[NSImage alloc] initWithSize:NSMakeSize(m,m)];
[testImage lockFocus];
[userImage drawInRect:NSMakeRect(0,0,m,m) fromRect:NSMakeRect(m*i,
0,m,m)
operation:NSCompositeSourceOver fraction:1.0];
[testImage unlockFocus];
[images addObject:testImage];
}
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