第六章 层的滤镜

CIFilter *blurFilter =
[CIFilterfilterWithName:@”CIGaussianBlur”];
[blurFilter setDefaults];
[blurFiltersetValue:[NSNumber numberWithFloat:5.0f] forKey:@”inputRadius”];
[layer setFilters:[NSArrayarrayWithObject:blurFilter]];

CIFilter *blurFilter =
[CIFilterfilterWithName:@”CIGaussianBlur”];
[blurFilter setDefaults];
[blurFiltersetValue:[NSNumber numberWithFloat:0.0f] forKey:@”inputRadius”];
[blurFilter setName:@”blur”];
[layer setFilters:[NSArrayarrayWithObject:blurFilter]];

- (void)awakeFromNib {
        [self setWantsLayer:YES]; //Initialize the layer
        blurLayer = [[[BlurLayeralloc]init] retain]; 
        [blurLayer setMasksToBounds:YES];

        // Set the layer to fill theentire frame
        [blurLayersetFrame:CGRectMake(0.0, 0.0,
        [self frame].size.width,[self frame].size.height)];
        [[self layer]addSublayer:blurLayer];

        // Initialize the Gaussianblur filter
        CIFilter *blurFilter =
        [CIFilterfilterWithName:@”CIGaussianBlur”];
        [blurFilter setDefaults];
        [blurFiltersetValue:[NSNumber numberWithFloat:0.0] forKey:@"inputRadius"];

        // Give the Gaussian blurfilter a name
        [blurFilter setName:@”blur”];
        [blurLayersetFilters:[NSArray arrayWithObject:blurFilter]];
}

-(void)applicationDidFinishLaunching:(NSNotification *)aNotification {

        NSString *iconPath1 =[[NSBundle mainBundle] pathForResource:@"desktop" ofType:@"png"];
        NSString *iconPath2 =[[NSBundle mainBundle] pathForResource:@"fwdrive" ofType:@"png"];
        NSString *iconPath3 =[[NSBundle mainBundle] pathForResource:@"pictures" ofType:@"png"];
        NSString *iconPath4 =[[NSBundle mainBundle] pathForResource:@"computer" ofType:@"png"];

        NSImage *image1 = [[NSImagealloc] initWithContentsOfFile:iconPath1];
        NSImage *image2 = [[NSImagealloc] initWithContentsOfFile:iconPath2];
        NSImage *image3 = [[NSImagealloc] initWithContentsOfFile:iconPath3];
        NSImage *image4 = [[NSImagealloc] initWithContentsOfFile:iconPath4];

        [blurView1 setLayerImage:image1];
        [blurView2 setLayerImage:image2]; 
        [blurView3 setLayerImage:image3]; 
        [blurView4setLayerImage:image4];
}

-(BOOL)acceptsFirstResponder {
        return YES; 
}

- (void)mouseDown:(NSEvent*)theEvent {
        CABasicAnimation *anim = [CABasicAnimationanimationWithKeyPath:
        @"filters.blur.inputRadius"];
        // Set the filter’s startvalue
        [anim setFromValue:[NSNumbernumberWithFloat:0.0f]]; // Set the filter’s ending value
        [anim setToValue:[NSNumbernumberWithFloat:5.0f]]; 
        [anim setDuration:0.2f];
        [anim setAutoreverses:YES];
        [animsetRemovedOnCompletion:YES];
        [blurLayer addAnimation:animforKey:@"filters.blur.inputRadius"]; 
}

- (void)mouseDown:(NSEvent*)theEvent  {
        CABasicAnimation *anim =[CABasicAnimation
        animationWithKeyPath:@"filters.blur.inputRadius"];
        if(toggle) {
                [anim setFromValue:[NSNumbernumberWithFloat:0.0f]];
                [anim setToValue:[NSNumbernumberWithFloat:5.0f]]; 
        }
        else {
                [anim setFromValue:[NSNumbernumberWithFloat:5.0f]]; 
                [anim setToValue:[NSNumber numberWithFloat:0.0f]];
        }
        [anim setDuration:0.2f];
        [animsetRemovedOnCompletion:NO];
        [animsetFillMode:kCAFillModeForwards];
        [blurLayer addAnimation:anim forKey:@”filters.blur.inputRadius”];
        toggle = !toggle;
}

@interface AppDelegate :NSObject {
  IBOutlet NSView *displayView;
  CALayer *imageLayer; 
}
@property (retain)CALayer *imageLayer;
@end

@implementation AppDelegate
@synthesize imageLayer;
...

- (NSArray*)filters {
        CIFilter *blurFilter =
        [CIFilterfilterWithName:@"CIGaussianBlur"];
        [blurFilter setDefaults];
        [blurFiltersetValue:[NSNumber numberWithFloat:0.0] forKey:@”inputRadius”];
        [blurFilter setName:@"blur"];
        CIFilter *hueFilter =
        [CIFilterfilterWithName:@"CIHueAdjust"];
        [hueFilter setDefaults];
        [hueFilter setValue:[NSNumbernumberWithFloat:0.0] forKey:@”inputAngle”];
        [hueFilter setName:@"hue"];
        CIFilter *colorFilter =
        [CIFilterfilterWithName:@"CIColorControls"];
        [colorFilter setDefaults];
        [colorFilter setName:@"color"];
        return [NSArrayarrayWithObjects: blurFilter,hueFilter, colorFilter, nil];
}

@interface AppDelegate :NSObject { IBOutlet NSView *displayView; CALayer *imageLayer;
}
@property (retain)CALayer*imageLayer;
- (NSArray*)filters;
-(CGImageRef)nsImageToCGImageRef:(NSImage*)image;
@end
@implementation AppDelegate@synthesize imageLayer;
- (void)awakeFromNib {
        [displayView setWantsLayer:YES];
        imageLayer = [[CALayer layer]retain];
        CGRect frame =CGRectMake(0.0f, 0.0f,
        [displayViewframe].size.width, [displayView frame].size.height);
        [imageLayer setFrame:frame];
        [imageLayer setCornerRadius:15.0f]; 
        [imageLayer setBorderWidth:3.0f]; 
        [imageLayersetMasksToBounds:YES];

        NSString *imagePath =[[NSBundle mainBundle] pathForResource:@"balloon"
        ofType:@"jpg"];
        [imageLayer setContents:(id)[self nsImageToCGImageRef:
        [[NSImage alloc]initWithContentsOfFile:imagePath]]];
        [imageLayer setFilters:[selffilters]];
        [[displayView layer]addSublayer:imageLayer]; 
}
- (NSArray*)filters {
        CIFilter *blurFilter =
        [CIFilterfilterWithName:@"CIGaussianBlur"];
        [blurFilter setDefaults];
        [blurFiltersetValue:[NSNumber numberWithFloat:0.0] forKey:@"inputRadius"];
        [blurFilter setName:@"blur"];

        CIFilter *hueFilter =
        [CIFilterfilterWithName:@"CIHueAdjust"];
        [hueFilter setDefaults];
        [hueFilter setValue:[NSNumbernumberWithFloat:0.0]
        forKey:@"inputAngle"];

        [hueFilter setName:@"hue"];
        CIFilter *colorFilter = [CIFilter filterWithName:@"CIColorControls"];
        [colorFilter setDefaults];
        [colorFilter setName:@"color"];
        return [NSArrayarrayWithObjects: blurFilter,
        hueFilter, colorFilter, nil];
}
-(CGImageRef)nsImageToCGImageRef:(NSImage*)image; {
        NSData * imageData = [imageTIFFRepresentation]; 
        CGImageRef imageRef;
        if(imageData)
        {
        CGImageSourceRef imageSource= CGImageSourceCreateWithData((CFDataRef)imageData, NULL);
        imageRef = CGImageSourceCreateImageAtIndex(imageSource,0, NULL); }
        return imageRef; }
        - (void)dealloc; {
        if( imageLayer ) [imageLayerrelease];
        [super dealloc]; 
}
@end

CATransition*transition=[CATransition animation];
[transitionsetType:kCATransitionMoveIn];
[transitionsetSubtype:kCATransitionFromTop];
[transitionsetDuration:1.0f];
// Get the current list ofactions
NSMutableDictionary *actions= [NSMutableDictionary dictionaryWithDictionary:[transitionLayer actions]];
[actions setObject:transitionforKey:@”opacity”];
[transitionLayersetActions:actions];

[layersetDelegate：self]；

-       (id<CAAction>)actionForLayer:(CALayer*)layer forKey:(NSString *)key;

@interface RippleLayer :CALayer { }
@end
@implementation RippleLayer
+(id<CAAction>)defaultActionForKey:(NSString *)key {
        if( [keyisEqualToString@”bounds”] )
        {}
        // Going to cheat a littlebit here. Since this is a class
        // method, we can’t get thedimensions from self. Instead,
        // we need to obtain thissize some other way in a real-world // application.
        float w = 480.0;
        float h = 360.0;
        NSURL *url = [NSURLfileURLWithPath:
        [[NSBundle mainBundle] pathForResource:@”Shading”ofType:@”tiff”]];
        CIImage *shadingImage = [[CIImage alloc]initWithContentsOfURL: url];
        CIFilter *rippleFilter = [CIFilterfilterWithName:@”CIRippleTransition”]; 
        [rippleFilter setDefaults];
        [rippleFiltersetValue:shadingImage
        forKey:@”inputShadingImage”];
        [rippleFiltersetValue:[CIVector vectorWithX: 0.5*w Y: 0.5*h] forKey:@”inputCenter”];
        CATransition*theTransition=[CATransition animation]; 
        [theTransitionsetFilter:rippleFilter]; 
        [theTransition setDuration:2.0f];
        return theTransition;
        // Cause the layer to use itsdefault transition
        return nil; 
}
@end

#import “RippleLayer.h”
@interface AppDelegate :NSObject { 
IBOutlet NSWindow *window; 
RippleLayer *transitionLayer;
BOOL toggle; }
-(IBAction)doTransition:(id)sender;@end
@implementation AppDelegate-(void)awakeFromNib;
{
        [[window contentView]setWantsLayer:YES]; CGColorRef green =
        CGColorCreateGenericRGB(0,0.45, 0, 1);
        transitionLayer =[[[RippleLayer alloc] init] retain]; 
        [transitionLayer setFrame: NSRectToCGRect([[windowcontentView] frame])];
        [transitionLayersetBackgroundColor:green];
        [transitionLayer setDelegate:self];
        [transitionLayersetBorderWidth:3];
        // Keep the layer behind thebutton
        [[[window contentView] layer]insertSublayer:transitionLayer atIndex:0];
        CFRelease(green); }
        -(IBAction)doTransition:(id)sender;{
        CGRect contentRect =
        NSRectToCGRect([[windowcontentView] frame]);
        if(toggle) {
        [transitionLayersetBounds:contentRect]; }
        else
        {
        CGRect newFrame =CGRectMake((contentRect.size.width / 2) - 100.0,
        (contentRect.size.height / 2)- 100.0, contentRect.size.width - 200.0, contentRect.size.height - 200.0);
        [transitionLayersetBounds:newFrame]; }
        toggle = !toggle; 
}

- (void)dealloc {
        [transitionLayer release],transitionLayer = nil;
        [super dealloc]; 
}
@end

@interface AppDelegate :NSObject {
 IBOutlet NSWindow *window;
CALayer *transitionLayer;
CIImage *shadingImage;
CIVector *extent;
BOOL  toggle;}
- (CIImage *)shadingImage;
-(IBAction)doTransition:(id)sender;@end
@implementation AppDelegate-(void)awakeFromNib;
{
        [[window contentView]setWantsLayer:YES]; 
        CGColorRef green = CGColorCreateGenericRGB(0,0.45, 0, 1);
        transitionLayer = [CALayerlayer]; [transitionLayer setFrame:
        NSRectToCGRect([[windowcontentView] frame])]; 
        [transitionLayer setBackgroundColor:green];
        [transitionLayer setDelegate:self];
        [transitionLayer setBorderWidth:3];
        // Keep the layer behind ourbutton.
        [[[window contentView] layer]insertSublayer:transitionLayer atIndex:0];
        CFRelease(green); }
        -(id<CAAction>)actionForLayer:(CALayer *)layer forKey:(NSString *)key;
        {
        if( layer == transitionLayer) {
        if( [key compare:@”bounds”]== NSOrderedSame ) {
        float w = [[window contentView]frame].size.width;
        float h = [[window contentView] frame].size.height;
        CIFilter *rippleFilter = [CIFilterfilterWithName:@”CIRippleTransition”];
        } 
}
[rippleFilter setDefaults];
[rippleFilter setValue:[selfshadingImage]
forKey:@”inputShadingImage”];
[rippleFilter setValue:
[CIVector vectorWithX: 0.5*wY: 0.5*h]
forKey:@”inputCenter”];
CATransition*theTransition=[CATransition animation]; 
[theTransitionsetFilter:rippleFilter];
 [theTransition setDuration:2.0f];
return theTransition;
// Cause the layer to use itsdefault transition
return nil; 
}
- (CIImage *)shadingImage {
        if(!shadingImage) {
        NSURL *url;
        url = [NSURL fileURLWithPath:
        [[NSBundle mainBundle]pathForResource:@”Shading” ofType:@”tiff”]];
        shadingImage = [[CIImagealloc] initWithContentsOfURL: url];
        }
        return shadingImage; 
}

-(IBAction)doTransition:(id)sender {
        CGRect contentRect =
        NSRectToCGRect([[windowcontentView] frame]);
        if(toggle) {
        [transitionLayersetBounds:contentRect];
        }
        else
        {
        CGRect newFrame =CGRectMake((contentRect.size.width / 2) - 100.0,
        (contentRect.size.height / 2)- 100.0, contentRect.size.width - 200.0, contentRect.size.height - 200.0);
        [transitionLayersetBounds:newFrame]; }
        toggle = !toggle; 
}
@end