OS X 10.9
I need to scale an NSImage's dimensions to exactly 640x480 pixels before
sending it remotely for processing. If I use NSImage's -setSize:(NSSize)
method, it does set the size - temporarily. If I then try to serialize that
NSImage into an NSData for transfer, that resize information seems to get lost:
NSImage *oldImage = [[NSImage alloc] initWithContentsOfFile:myFilename];
[oldImage setSize:NSMakeSize(640.0,480.0)];
NSLog(@"Old Image: %@",oldImage);
NSData *dataObj = [oldImage
TIFFRepresentationUsingCompression:NSTIFFCompressionLZW factor:1.0 ];
NSImage *newImage = [[NSImage alloc ] initWithData:dataObj];
NSLog(@"New Image: %@",newImage);
* Old Image: <NSImage 0x618000267840 Size={640, 480} Reps=(
"NSBitmapImageRep 0x6180002a4320 Size={1670, 1200} ColorSpace=(not yet
loaded) BPS=8 BPP=(not yet loaded) Pixels=1670x1200 Alpha=NO Planar=NO
Format=(not yet loaded) CurrentBacking=nil (faulting)
CGImageSource=0x61800016b700"
)>
* New Image: <NSImage 0x618000073e00 Size={1670, 1200} Reps=(
"NSBitmapImageRep 0x6180000b4700 Size={1670, 1200} ColorSpace=(not yet
loaded) BPS=8 BPP=(not yet loaded) Pixels=1670x1200 Alpha=NO Planar=NO
Format=(not yet loaded) CurrentBacking=nil (faulting)
CGImageSource=0x61800017e240"
)>
What is the correct way to do this?
-Carl
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