Get the correct image width and height of an NSImage

Question

I use the code below to get the width and height of a NSImage:

NSImage *image = [[[NSImage alloc] initWithContentsOfFile:[NSString stringWithFormat:s]] autorelease]; imageWidth=[image size].width; imageHeight=[image size].height; NSLog(@"%f:%f",imageWidth,imageHeight); 

But sometime imageWidth, imageHeight does not return the correct value. For example when I read an image, the EXIF info displays:

PixelXDimension = 2272; PixelYDimension = 1704; 

But imageWidth, imageHeight outputs

521:390  

Answer 1

Dimensions of your image in pixels is stored in NSImageRep of your image. If your file contains only one image, it will be like this:

NSImageRep *rep = [[image representations] objectAtIndex:0]; NSSize imageSize = NSMakeSize(rep.pixelsWide, rep.pixelsHigh); 

where image is your NSImage and imageSize is your image size in pixels.