Implementation of mac osx mosaic

Reference resources The implementation of mosaic with variable position of iOS finger Implement mac osx version

With the help of CIFilter filter in CoreImage library, we can easily implement mosaic code of pictures as follows

NSImage * img1 = [NSImage imageNamed:@"1.png"]; CGImageSourceRef source = CGImageSourceCreateWithData((__bridge CFDataRef)img1.TIFFRepresentation, nil); CGImageRef inImage = CGImageSourceCreateImageAtIndex(source, 0, nil); CIImage *ciImage = [[CIImage alloc] initWithCGImage:inImage]; CIFilter *filter = [CIFilter filterWithName:@"CIPixellate"]; [filter setDefaults]; [filter setValue:ciImage forKey:kCIInputImageKey]; [filter setValue:@(10.f) forKey:kCIInputScaleKey]; CIImage * outPutImg = [filter outputImage]; NSCIImageRep * rep = [NSCIImageRep imageRepWithCIImage:outPutImg]; NSImage *img2 = [[NSImage alloc] initWithSize:[outPutImg extent].size]; [img2 addRepresentation:rep];

Display mosaic according to Path through layer mask

//mac must set wantsLayer = YES to use the layer, and the default is NO self.view.wantsLayer = YES; //Add layer (imageLayer) to self self.imageLabyer = [CALayer layer]; self.imageLabyer.frame = self.view.bounds; [self.view.layer addSublayer:self.imageLabyer]; self.shapeLayer = [CAShapeLayer layer]; self.shapeLayer.frame = self.view.bounds; self.shapeLayer.lineCap = kCALineCapRound; self.shapeLayer.lineJoin = kCALineJoinRound; self.shapeLayer.lineWidth = 40.0f; self.shapeLayer.strokeColor = [[NSColor blueColor] CGColor]; self.shapeLayer.fillColor = nil; [self.view.layer addSublayer:self.shapeLayer]; //Set mask self.imageLabyer.mask = self.shapeLayer; self.path = CGPathCreateMutable(); //Set mosaic picture self.imageLabyer.contents = img2; //Set base map self.view.layer.contents = img1;

Set View to listen to mouse movement messages
[self.view addTrackingRect:self.view.bounds owner:self userData:nil assumeInside:YES];

Handle mouse movement messages

- (void)mouseDown:(NSEvent *)event { CGPoint pt = event.locationInWindow; CGPathMoveToPoint(self.path, NULL, pt.x, pt.y); CGMutablePathRef path = CGPathCreateMutableCopy(self.path); self.shapeLayer.path = path; CGPathRelease(path); NSLog(@"mouseDown"); } -(void)mouseUp:(NSEvent *)event { NSLog(@"mouseUp"); } -(void)mouseDragged:(NSEvent *)event { CGPoint pt = event.locationInWindow; CGPathAddLineToPoint(self.path, NULL,pt.x, pt.y); CGMutablePathRef path = CGPathCreateMutableCopy(self.path); self.shapeLayer.path = path; CGPathRelease(path); NSLog(@"mouseDragged"); }

Source code

Shenzhen Licheng Electronic Co., Ltd

2 December 2019, 01:22 | Views: 7312