//

//  RGBAppController.m

//  RGB Image

//

//  Created by jcr on Thu Feb 21 2002.

//  Copyright (c) 2002  Apple Computer, Inc. All rights reserved.

#import "RGBAppController.h"

#import "NSImageColorSeparation.h"

@implementation RGBAppController

- (void) awakeFromNib

    {

    showRed = showGreen = showBlue = showAlpha = YES;

    [self imageChanged:nil];

    }

- (IBAction) showTheMandrill:sender

    {

    [originalImageView setImage:[NSImage imageNamed:@"mandrill"]];

    [self imageChanged:nil];

    }

- (IBAction)imageChanged:(id)sender

    {

    NSImage 

        *originalImage = sender ? [sender image] : [originalImageView image];

    [[sender cell] setHighlighted:NO];

    if (sender)

        [originalImageView setImage:originalImage];

    [redImageView setImage: [[originalImageView image] redImage]];  

    [greenImageView setImage: [[originalImageView image] greenImage]];  

    [blueImageView setImage: [[originalImageView image] blueImage]];    

    [alphaImageView setImage: [originalImage alphaMaskWithColor:[NSColor blackColor]]];

    [combinedImageView setImage:[self combinedImage]];

    }

- (NSImage *) RGBImage  // image consisting of the selected components, not including alpha.

    {

    NSImage 

        *rgbImage = [[[NSImage alloc] initWithSize:[[originalImageView image] size]] autorelease];

  [rgbImage lockFocus];

    if (showRed) [[redImageView image] compositeToPoint:NSZeroPoint operation:NSCompositePlusLighter];

    if (showGreen) [[greenImageView image] compositeToPoint:NSZeroPoint operation:NSCompositePlusLighter];

    if (showBlue) [[blueImageView image] compositeToPoint:NSZeroPoint operation:NSCompositePlusLighter];

    [rgbImage unlockFocus];

    return rgbImage;

    }

- (NSImage *) combinedImage

    {

    NSImage 

        *original = [originalImageView image];

    NSSize 

        imageSize = [original size];

    NSImage 

        *newImage = [[[NSImage alloc] initWithSize:imageSize] autorelease];

    [newImage lockFocus];

    [[NSColor clearColor] set];

    NSRectFill(NSMakeRect(0, 0, imageSize.width, imageSize.height));

    if (showAlpha)  [[original alphaMaskWithColor:[NSColor blackColor]] 

        compositeToPoint:NSZeroPoint operation:NSCompositeCopy];

    [[self RGBImage] compositeToPoint:NSZeroPoint operation:NSCompositeSourceAtop];

    [newImage unlockFocus];

    return newImage;

    }

 // some one-liners.

- (IBAction)setUsesAlpha:(id)sender     { showAlpha = [sender intValue]; [self imageChanged:nil]; }

- (IBAction)setShowRed:(id)sender { showRed = [sender intValue]; [self imageChanged:nil]; }

- (IBAction)setShowGreen:(id)sender { showGreen = [sender intValue]; [self imageChanged:nil]; }

- (IBAction)setShowBlue:(id)sender { showBlue = [sender intValue]; [self imageChanged:nil]; }

- (BOOL)applicationShouldTerminateAfterLastWindowClosed:(NSApplication *)theApplication { return YES; }

@end

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