NSImage+Masked.m

// Usually, initialize an NSImage with a black and white Vector image (pdf)
- (NSImage *)cdsMaskedWithColor:(NSColor *)color
{
    CGRect rect = CGRectMake(0, 0, self.size.width, self.size.height);
    
    NSImage *result = [[NSImage alloc] initWithSize:self.size];
    [result lockFocusFlipped:self.isFlipped];
    
    NSGraphicsContext *context = [NSGraphicsContext currentContext];
    CGContextRef c = (CGContextRef)[context graphicsPort];
    
    [self drawInRect:NSRectFromCGRect(rect)];
    
    CGContextSetFillColorWithColor(c, [color CGColor]);
    CGContextSetBlendMode(c, kCGBlendModeSourceAtop);
    CGContextFillRect(c, rect);
    
    [result unlockFocus];
    
    return [result autorelease];
}
+ (NSImage *)cdsMaskedImageNamed:(NSString *)name color:(NSColor *)color
{
    NSImage *image = [NSImage imageNamed:name];
    return [image cdsMaskedWithColor:color];
}