// the header file
#import <Cocoa/Cocoa.h>
#import <QuartzCore/QuartzCore.h>

#import "ACPlugin.h"

@interface ACGrayscalePlugin : NSObject <ACPlugin> {
	
}

@end


// the implementation

#import "ACGrayscalePlugin.h"

@implementation ACGrayscalePlugin

+ (id) plugin {
	return [[[self alloc] init] autorelease];
}

- (void) willRegister:(id<ACPluginManager>)pluginManager {
	
	[pluginManager addFilterMenuTitle:@"Grayscale"
	               withSuperMenuTitle:@"Color"
	                           target:self
	                           action:@selector(convert:userObject:)
	                    keyEquivalent:@""
	        keyEquivalentModifierMask:0
	                       userObject:nil];
}


- (CIImage*) convert:(CIImage*)image userObject:(id)uo {
	#pragma unused (uo)
	CIFilter *filter = [CIFilter filterWithName: @"CIColorMonochrome" keysAndValues: @"inputImage", image, nil];
	
	CIColor *color = [CIColor colorWithRed:0.5f green:0.5f blue:0.5f];
	
	[filter setDefaults];
	[filter setValue:color forKey:@"inputColor"];
	[filter setValue:[NSNumber numberWithFloat:1] forKey:@"inputIntensity"];
	
	return [filter valueForKey: @"outputImage"];
}

- (void) didRegister {

}

@end