dspsizes.m

#import <Foundation/Foundation.h>
#import <AppKit/AppKit.h>

int main (int argc, const char * argv[]) {
    NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
    NSArray *allScreens = [NSScreen screens];
	if (allScreens == NULL) {
		printf("ERROR: No screens found.");
		return 1;
	}
	NSEnumerator *enumerator = [allScreens objectEnumerator];
	id object;
	while (object = [enumerator nextObject]) {
		NSString *isScreen = [[object deviceDescription] objectForKey:NSDeviceIsScreen];
		if ([isScreen isEqualToString:@"YES"] == YES) {
			int width = [[[object deviceDescription] objectForKey:NSDeviceSize] sizeValue].width;
			int height = [[[object deviceDescription] objectForKey:NSDeviceSize] sizeValue].height;
			printf("%d x %d\n", width, height);
		}
	}
    [pool drain];
    return 0;
}