//

//  TintedImage.m

//  RGBImage

//

//  Created by jcr on Thu Feb 21 2002.

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

@implementation NSImage (TintedImage)

- (NSImage *) tintedImageWithColor:(NSColor *) tint // This is a simpler way to call the main method below..

  {

  return [self tintedImageWithColor: tint operation:NSCompositeSourceAtop];

  }

- (NSImage *) tintedImageWithColor:(NSColor *) tint operation:(NSCompositingOperation) op  

// This method creates a new image, draws the original image into it, composites  the tint color over it with the given  NSCompositingOperation value, and returns the resulting image.

  {

  NSSize 

    size = [self size];

  NSRect

    imageBounds = NSMakeRect(0, 0, size.width, size.height);    

  NSImage 

    *newImage = [[NSImage alloc] initWithSize:size];  //  get a new image, the same size as this one

  [newImage lockFocus];   // Draw on the new Image.

  [self compositeToPoint:NSZeroPoint operation:NSCompositeSourceOver];  // copy our existing contents.

  [tint set];  // make sure the color has an alpha component, or we'll get a solid rectangle

  NSRectFillUsingOperation(imageBounds, op); // start drawing on the new image.

  [newImage unlockFocus];   //  Have to balance the -lockFocus/-unlockFocus calls.

  return [newImage autorelease];  // Always balance the -retain/-release calls.

  }

@end

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