I'm doing some operations on images, and after I'm done, I want to save the image as PNG on the disk. I'm doing the following: + (void)saveImage:(NSImage *)image atPath:(NSString *)path { [image...

I have a generative art application which starts with a small set of points, grows them outwards, and checks the growth to make sure it doesn't intersect with anything. My first naive implementatio...

I have an NSImage. I would like to read the NSColor for a pixel at some x and y. Xcode seems to thing that there is a colorAtX:y: method on NSImage, but this causes a crash saying that there is no ...

How to convert NSImage to NSBitmapImageRep? I have code: - (NSBitmapImageRep *)bitmapImageRepresentation { NSBitmapImageRep *ret = (NSBitmapImageRep *)[self representations]; if(![ret isKindOfC...

I had created 32 bit NSImage with following code. NSBitmapImageRep *sourceRep = [[NSBitmapImageRep alloc] initWithData: imageData]; // create a new bitmap representation scaled down NSBitmapI...

I have a CALayer (containerLayer) that I'm looking to convert to a NSBitmapImageRep before saving the data out as a flat file. containerLayer has its geometryFlipped property set to YES, and this s...

I have a 32-bit NSBitmapImageRep which has an alpha channel with essentially 1-bit values (the pixels are either on or off). I want to save this bitmap to an 8-bit PNG file with transparency. If I...