Created
February 14, 2024 09:40
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ZIP compression for TIFF macOS Cocoa
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NSTIFFCompression with zip has enum value 8 | |
NSData *originalData = [NSData dataWithContentsOfURL:URL]; | |
NSImage *image = [[NSImage alloc] initByReferencingURL:URL]; | |
NSBitmapImageRep *imageRep = (NSBitmapImageRep *)[[image representations] firstObject]; | |
NSLog(@"%@", [NSBitmapImageRep localizedNameForTIFFCompressionType:8]); //prints null | |
BOOL canBecompressed = [imageRep canBeCompressedUsing:8]; | |
NSLog(@"%d", canBecompressed); //prints NO | |
NSData *lzwData = [imageRep TIFFRepresentationUsingCompression:NSTIFFCompressionLZW factor:1.0]; | |
NSData *zipData = [imageRep TIFFRepresentationUsingCompression:8 factor:1.0]; | |
NSLog(@"%lu", [originalData length]); //104050196 | |
NSLog(@"%lu", [lzwData length]); //697104 | |
NSLog(@"%lu", [zipData length]); //349616 | |
// NSTIFFCompression compression; | |
// float factor; | |
// [imageRep getCompression:&compression factor:&factor]; |
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