The Flying Meat Wiki: AcornMakeGrayscaleObjcPlugin

Most recent edit on 2007-11-12 10:16:09 by GusMueller

Deletions:
trorc4telbas

Edited on 2007-11-11 23:49:30 by RacelTerla

Additions:
trorc4telbas

Edited on 2007-09-13 15:58:17 by GusMueller

Additions:
A version of this, along with the Xcode project is available in SampleAcornPlugins.zip∞

Oldest known version of this page was edited on 2007-09-12 17:54:49 by GusMueller []

Page view:

And here is an example which takes the current bitmap layer and converts it to grayscale using CoreImage, using Objective-C.

// 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

Back to AcornPlugins

The Flying Meat Wiki : AcornMakeGrayscaleObjcPlugin