├── MPS_Subclassing ├── DSC00773.jpg ├── Assets.xcassets │ └── AppIcon.appiconset │ │ └── Contents.json ├── AdditionalCompositing.metal ├── Info.plist ├── Base.lproj │ ├── Main.storyboard │ └── LaunchScreen.storyboard ├── AppDelegate.swift └── ViewController.swift ├── MPS_Subclassing.xcodeproj ├── project.xcworkspace │ └── contents.xcworkspacedata ├── xcuserdata │ └── simongladman.xcuserdatad │ │ └── xcschemes │ │ ├── xcschememanagement.plist │ │ └── MPS_Subclassing.xcscheme └── project.pbxproj └── LICENSE.md /MPS_Subclassing/DSC00773.jpg: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/FlexMonkey/Bokeh/HEAD/MPS_Subclassing/DSC00773.jpg -------------------------------------------------------------------------------- /MPS_Subclassing.xcodeproj/project.xcworkspace/contents.xcworkspacedata: -------------------------------------------------------------------------------- 1 | 2 | 4 | 6 | 7 | 8 | -------------------------------------------------------------------------------- /MPS_Subclassing.xcodeproj/xcuserdata/simongladman.xcuserdatad/xcschemes/xcschememanagement.plist: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | SchemeUserState 6 | 7 | MPS_Subclassing.xcscheme 8 | 9 | orderHint 10 | 0 11 | 12 | 13 | SuppressBuildableAutocreation 14 | 15 | 3E0811FC1CD3B1C4001581D3 16 | 17 | primary 18 | 19 | 20 | 21 | 22 | 23 | -------------------------------------------------------------------------------- /MPS_Subclassing/Assets.xcassets/AppIcon.appiconset/Contents.json: -------------------------------------------------------------------------------- 1 | { 2 | "images" : [ 3 | { 4 | "idiom" : "ipad", 5 | "size" : "29x29", 6 | "scale" : "1x" 7 | }, 8 | { 9 | "idiom" : "ipad", 10 | "size" : "29x29", 11 | "scale" : "2x" 12 | }, 13 | { 14 | "idiom" : "ipad", 15 | "size" : "40x40", 16 | "scale" : "1x" 17 | }, 18 | { 19 | "idiom" : "ipad", 20 | "size" : "40x40", 21 | "scale" : "2x" 22 | }, 23 | { 24 | "idiom" : "ipad", 25 | "size" : "76x76", 26 | "scale" : "1x" 27 | }, 28 | { 29 | "idiom" : "ipad", 30 | "size" : "76x76", 31 | "scale" : "2x" 32 | } 33 | ], 34 | "info" : { 35 | "version" : 1, 36 | "author" : "xcode" 37 | } 38 | } -------------------------------------------------------------------------------- /MPS_Subclassing/AdditionalCompositing.metal: -------------------------------------------------------------------------------- 1 | // 2 | // AdditionalCompositing.metal 3 | // MPS_Subclassing 4 | // 5 | // Created by Simon Gladman on 29/04/2016. 6 | // Copyright © 2016 Simon Gladman. All rights reserved. 7 | // 8 | 9 | #include 10 | using namespace metal; 11 | 12 | kernel void additionalCompositing(texture2d primaryTexture [[texture(0)]], 13 | texture2d secondaryTexture [[texture(1)]], 14 | texture2d destinationTexture [[texture(2)]], 15 | constant float &secondryTextureBrightness [[ buffer(0) ]], 16 | uint2 id [[thread_position_in_grid]]) 17 | { 18 | float4 primaryPixel = primaryTexture.read(id); 19 | float4 secondaryPixel = secondaryTexture.read(id); 20 | 21 | destinationTexture.write(saturate(primaryPixel + (secondaryPixel * secondryTextureBrightness)), id); 22 | } 23 | -------------------------------------------------------------------------------- /LICENSE.md: -------------------------------------------------------------------------------- 1 | The MIT License (MIT) 2 | 3 | Copyright (c) 2016 simon gladman 4 | 5 | Permission is hereby granted, free of charge, to any person obtaining a copy 6 | of this software and associated documentation files (the "Software"), to deal 7 | in the Software without restriction, including without limitation the rights 8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 9 | copies of the Software, and to permit persons to whom the Software is 10 | furnished to do so, subject to the following conditions: 11 | 12 | The above copyright notice and this permission notice shall be included in all 13 | copies or substantial portions of the Software. 14 | 15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 21 | SOFTWARE. 22 | -------------------------------------------------------------------------------- /MPS_Subclassing/Info.plist: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | CFBundleDevelopmentRegion 6 | en 7 | CFBundleExecutable 8 | $(EXECUTABLE_NAME) 9 | CFBundleIdentifier 10 | $(PRODUCT_BUNDLE_IDENTIFIER) 11 | CFBundleInfoDictionaryVersion 12 | 6.0 13 | CFBundleName 14 | $(PRODUCT_NAME) 15 | CFBundlePackageType 16 | APPL 17 | CFBundleShortVersionString 18 | 1.0 19 | CFBundleSignature 20 | ???? 21 | CFBundleVersion 22 | 1 23 | LSRequiresIPhoneOS 24 | 25 | UILaunchStoryboardName 26 | LaunchScreen 27 | UIMainStoryboardFile 28 | Main 29 | UIRequiredDeviceCapabilities 30 | 31 | armv7 32 | 33 | UISupportedInterfaceOrientations~ipad 34 | 35 | UIInterfaceOrientationPortrait 36 | UIInterfaceOrientationPortraitUpsideDown 37 | UIInterfaceOrientationLandscapeLeft 38 | UIInterfaceOrientationLandscapeRight 39 | 40 | 41 | 42 | -------------------------------------------------------------------------------- /MPS_Subclassing/Base.lproj/Main.storyboard: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | -------------------------------------------------------------------------------- /MPS_Subclassing/Base.lproj/LaunchScreen.storyboard: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | -------------------------------------------------------------------------------- /MPS_Subclassing/AppDelegate.swift: -------------------------------------------------------------------------------- 1 | // 2 | // AppDelegate.swift 3 | // MPS_Subclassing 4 | // 5 | // Created by Simon Gladman on 29/04/2016. 6 | // Copyright © 2016 Simon Gladman. All rights reserved. 7 | // 8 | 9 | import UIKit 10 | 11 | @UIApplicationMain 12 | class AppDelegate: UIResponder, UIApplicationDelegate { 13 | 14 | var window: UIWindow? 15 | 16 | 17 | func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool { 18 | // Override point for customization after application launch. 19 | return true 20 | } 21 | 22 | func applicationWillResignActive(application: UIApplication) { 23 | // Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state. 24 | // Use this method to pause ongoing tasks, disable timers, and throttle down OpenGL ES frame rates. Games should use this method to pause the game. 25 | } 26 | 27 | func applicationDidEnterBackground(application: UIApplication) { 28 | // Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later. 29 | // If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits. 30 | } 31 | 32 | func applicationWillEnterForeground(application: UIApplication) { 33 | // Called as part of the transition from the background to the inactive state; here you can undo many of the changes made on entering the background. 34 | } 35 | 36 | func applicationDidBecomeActive(application: UIApplication) { 37 | // Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface. 38 | } 39 | 40 | func applicationWillTerminate(application: UIApplication) { 41 | // Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:. 42 | } 43 | 44 | 45 | } 46 | 47 | -------------------------------------------------------------------------------- /MPS_Subclassing.xcodeproj/xcuserdata/simongladman.xcuserdatad/xcschemes/MPS_Subclassing.xcscheme: -------------------------------------------------------------------------------- 1 | 2 | 5 | 8 | 9 | 15 | 21 | 22 | 23 | 24 | 25 | 30 | 31 | 32 | 33 | 39 | 40 | 41 | 42 | 43 | 44 | 54 | 56 | 62 | 63 | 64 | 65 | 66 | 67 | 73 | 75 | 81 | 82 | 83 | 84 | 86 | 87 | 90 | 91 | 92 | -------------------------------------------------------------------------------- /MPS_Subclassing/ViewController.swift: -------------------------------------------------------------------------------- 1 | // 2 | // ViewController.swift 3 | // MPS_Subclassing 4 | // 5 | // Created by Simon Gladman on 29/04/2016. 6 | // Copyright © 2016 Simon Gladman. All rights reserved. 7 | // 8 | 9 | import UIKit 10 | import MetalPerformanceShaders 11 | import MetalKit 12 | 13 | class ViewController: UIViewController, MTKViewDelegate 14 | { 15 | let highlightsOnly = false 16 | 17 | // MARK: Metal Objects 18 | 19 | let device = MTLCreateSystemDefaultDevice() 20 | 21 | lazy var commandQueue: MTLCommandQueue = 22 | { 23 | return self.device!.newCommandQueue() 24 | }() 25 | 26 | lazy var imageTexture: MTLTexture = 27 | { 28 | let textureLoader = MTKTextureLoader(device: self.device!) 29 | let imageTexture:MTLTexture 30 | 31 | let sourceImage = UIImage(named: "DSC00773.jpg")! 32 | 33 | do 34 | { 35 | imageTexture = try textureLoader.newTextureWithCGImage( 36 | sourceImage.CGImage!, 37 | options: nil) 38 | } 39 | catch 40 | { 41 | fatalError("unable to create texture from image") 42 | } 43 | 44 | return imageTexture 45 | }() 46 | 47 | // MARK: UI Components 48 | 49 | lazy var imageView: MTKView = 50 | { 51 | let imageView = MTKView( 52 | frame: CGRect(x: 0, y: 0, width: 640, height: 640), 53 | device: self.device!) 54 | 55 | imageView.framebufferOnly = false 56 | imageView.delegate = self 57 | 58 | return imageView 59 | }() 60 | 61 | // MARK: Metal Performance Shaders 62 | 63 | lazy var additionalCompositing: AdditionalCompositing = 64 | { 65 | let compositing = AdditionalCompositing(device: self.device!) 66 | compositing.secondryTextureBrightness = 0.4 67 | 68 | return compositing 69 | }() 70 | 71 | lazy var threshold: MPSImageThresholdBinary = 72 | { 73 | return MPSImageThresholdBinary( 74 | device: self.device!, 75 | thresholdValue: 0.99, 76 | maximumValue: 1.0, 77 | linearGrayColorTransform: nil) 78 | }() 79 | 80 | lazy var dilate: MPSImageDilate = 81 | { 82 | var probe = [Float]() 83 | 84 | let size = 45 85 | let v = Float(size / 4) 86 | let h = v * sqrt(3.0) 87 | let mid = Float(size) / 2 88 | 89 | for i in 0 ..< size 90 | { 91 | for j in 0 ..< size 92 | { 93 | let x = abs(Float(i) - mid) 94 | let y = abs(Float(j) - mid) 95 | 96 | let element = Float((x > h || y > v * 2.0) ? 97 | 1.0 : 98 | ((2.0 * v * h - v * x - h * y) >= 0.0) ? 0.0 : 1.0) 99 | 100 | probe.append(element) 101 | } 102 | } 103 | 104 | let dilate = MPSImageDilate( 105 | device: self.device!, 106 | kernelWidth: size, 107 | kernelHeight: size, 108 | values: probe) 109 | 110 | dilate.edgeMode = .Clamp 111 | 112 | return dilate 113 | }() 114 | 115 | lazy var rotate: MPSImageLanczosScale = 116 | { 117 | let scale = MPSImageLanczosScale(device: self.device!) 118 | 119 | var tx = MPSScaleTransform( 120 | scaleX: 1, 121 | scaleY: -1, 122 | translateX: 0, 123 | translateY: Double(-self.imageTexture.height)) 124 | 125 | withUnsafePointer(&tx) 126 | { 127 | scale.scaleTransform = $0 128 | } 129 | 130 | return scale 131 | }() 132 | 133 | lazy var blur: MPSImageGaussianBlur = 134 | { 135 | return MPSImageGaussianBlur(device: self.device!, sigma: 5) 136 | }() 137 | 138 | // MARK: Layout 139 | 140 | override func viewDidLoad() 141 | { 142 | super.viewDidLoad() 143 | 144 | view.addSubview(imageView) 145 | } 146 | 147 | override func viewDidLayoutSubviews() 148 | { 149 | imageView.frame.origin.x = view.frame.midX - imageView.frame.midX 150 | imageView.frame.origin.y = view.frame.midY - imageView.frame.midY 151 | } 152 | 153 | // MARK: MTKViewDelegate 154 | 155 | func mtkView(view: MTKView, drawableSizeWillChange size: CGSize) 156 | { 157 | 158 | } 159 | 160 | func drawInMTKView(view: MTKView) 161 | { 162 | if view.frame.size == CGSizeZero 163 | { 164 | return 165 | } 166 | 167 | guard let currentDrawable = view.currentDrawable where imageView.frame.size != CGSizeZero else 168 | { 169 | return 170 | } 171 | 172 | let commandQueue = device!.newCommandQueue() 173 | 174 | let commandBuffer = commandQueue.commandBuffer() 175 | 176 | let rotatedTexture = newTexture(width: imageTexture.width, height: imageTexture.height) 177 | let thresholdTexture = newTexture(width: imageTexture.width, height: imageTexture.height) 178 | let dilatedTexture = newTexture(width: imageTexture.width, height: imageTexture.height) 179 | let compositedTexture = newTexture(width: imageTexture.width, height: imageTexture.height) 180 | 181 | rotate.encodeToCommandBuffer( 182 | commandBuffer, 183 | sourceTexture: imageTexture, 184 | destinationTexture: rotatedTexture) 185 | 186 | if highlightsOnly 187 | { 188 | rotate.encodeToCommandBuffer( 189 | commandBuffer, 190 | sourceTexture: imageTexture, 191 | destinationTexture: rotatedTexture) 192 | 193 | threshold.encodeToCommandBuffer( 194 | commandBuffer, 195 | sourceTexture: rotatedTexture, 196 | destinationTexture: thresholdTexture) 197 | 198 | dilate.encodeToCommandBuffer( 199 | commandBuffer, 200 | sourceTexture: thresholdTexture, 201 | destinationTexture: dilatedTexture) 202 | 203 | additionalCompositing.encodeToCommandBuffer( 204 | commandBuffer, 205 | primaryTexture: rotatedTexture, 206 | secondaryTexture: dilatedTexture, 207 | destinationTexture: compositedTexture) 208 | 209 | blur.encodeToCommandBuffer( 210 | commandBuffer, 211 | sourceTexture: compositedTexture, 212 | destinationTexture: currentDrawable.texture) 213 | } 214 | else 215 | { 216 | dilate.encodeToCommandBuffer( 217 | commandBuffer, 218 | sourceTexture: rotatedTexture, 219 | destinationTexture: dilatedTexture) 220 | 221 | blur.encodeToCommandBuffer( 222 | commandBuffer, 223 | sourceTexture: dilatedTexture, 224 | destinationTexture: currentDrawable.texture) 225 | } 226 | 227 | 228 | 229 | commandBuffer.presentDrawable(imageView.currentDrawable!) 230 | 231 | commandBuffer.commit(); 232 | } 233 | 234 | func newTexture(width width: Int, height: Int) -> MTLTexture 235 | { 236 | let textureDesciptor = MTLTextureDescriptor.texture2DDescriptorWithPixelFormat( 237 | MTLPixelFormat.RGBA8Unorm, 238 | width: imageTexture.width, 239 | height: imageTexture.height, 240 | mipmapped: false) 241 | 242 | let texture = device!.newTextureWithDescriptor(textureDesciptor) 243 | 244 | return texture 245 | } 246 | } 247 | 248 | class AdditionalCompositing: MPSBinaryImageKernel 249 | { 250 | var secondryTextureBrightness: Float = 0.2 251 | 252 | override init(device: MTLDevice) 253 | { 254 | super.init(device: device) 255 | } 256 | 257 | lazy var defaultLibrary: MTLLibrary = 258 | { 259 | return self.device.newDefaultLibrary()! 260 | }() 261 | 262 | lazy var pipelineState: MTLComputePipelineState = 263 | { 264 | let kernelFunction = self.defaultLibrary.newFunctionWithName("additionalCompositing")! 265 | 266 | do 267 | { 268 | let pipelineState = try self.device.newComputePipelineStateWithFunction(kernelFunction) 269 | return pipelineState 270 | } 271 | catch 272 | { 273 | fatalError("Unable to create pipeline state for additionalCompositing") 274 | } 275 | }() 276 | 277 | lazy var threadsPerThreadgroup: MTLSize = 278 | { 279 | let maxTotalThreadsPerThreadgroup = Double(self.pipelineState.maxTotalThreadsPerThreadgroup) 280 | let threadExecutionWidth = Double(self.pipelineState.threadExecutionWidth) 281 | 282 | let threadsPerThreadgroupSide = 0.stride( 283 | to: Int(sqrt(maxTotalThreadsPerThreadgroup)), 284 | by: 1).reduce(16) 285 | { 286 | return (Double($1 * $1) / threadExecutionWidth) % 1 == 0 ? $1 : $0 287 | } 288 | 289 | return MTLSize( 290 | width:threadsPerThreadgroupSide, 291 | height:threadsPerThreadgroupSide, 292 | depth:1) 293 | }() 294 | 295 | override func encodeToCommandBuffer(commandBuffer: MTLCommandBuffer, 296 | inPlacePrimaryTexture: UnsafeMutablePointer, 297 | secondaryTexture: MTLTexture, 298 | fallbackCopyAllocator copyAllocator: MPSCopyAllocator?) -> Bool 299 | { 300 | fatalError("not implemented") 301 | } 302 | 303 | override func encodeToCommandBuffer(commandBuffer: MTLCommandBuffer, 304 | primaryTexture: MTLTexture, 305 | inPlaceSecondaryTexture: UnsafeMutablePointer, 306 | fallbackCopyAllocator copyAllocator: MPSCopyAllocator?) -> Bool { 307 | fatalError("not implemented") 308 | } 309 | 310 | override func encodeToCommandBuffer(commandBuffer: MTLCommandBuffer, 311 | primaryTexture: MTLTexture, 312 | secondaryTexture: MTLTexture, 313 | destinationTexture: MTLTexture) 314 | { 315 | let commandEncoder = commandBuffer.computeCommandEncoder() 316 | 317 | commandEncoder.setComputePipelineState(pipelineState) 318 | 319 | commandEncoder.setTexture(primaryTexture, atIndex: 0) 320 | commandEncoder.setTexture(secondaryTexture, atIndex: 1) 321 | commandEncoder.setTexture(destinationTexture, atIndex: 2) 322 | 323 | let buffer = device.newBufferWithBytes( 324 | &secondryTextureBrightness, 325 | length: sizeof(Float), 326 | options: MTLResourceOptions.CPUCacheModeDefaultCache) 327 | 328 | commandEncoder.setBuffer(buffer, offset: 0, atIndex: 0) 329 | 330 | let threadgroupsPerGrid = MTLSizeMake( 331 | destinationTexture.width / threadsPerThreadgroup.width, 332 | destinationTexture.height / threadsPerThreadgroup.height, 1) 333 | 334 | commandEncoder.dispatchThreadgroups( 335 | threadgroupsPerGrid, 336 | threadsPerThreadgroup: threadsPerThreadgroup) 337 | 338 | commandEncoder.endEncoding() 339 | } 340 | } -------------------------------------------------------------------------------- /MPS_Subclassing.xcodeproj/project.pbxproj: -------------------------------------------------------------------------------- 1 | // !$*UTF8*$! 2 | { 3 | archiveVersion = 1; 4 | classes = { 5 | }; 6 | objectVersion = 46; 7 | objects = { 8 | 9 | /* Begin PBXBuildFile section */ 10 | 3E0812011CD3B1C4001581D3 /* AppDelegate.swift in Sources */ = {isa = PBXBuildFile; fileRef = 3E0812001CD3B1C4001581D3 /* AppDelegate.swift */; }; 11 | 3E0812031CD3B1C4001581D3 /* ViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = 3E0812021CD3B1C4001581D3 /* ViewController.swift */; }; 12 | 3E0812061CD3B1C4001581D3 /* Main.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 3E0812041CD3B1C4001581D3 /* Main.storyboard */; }; 13 | 3E0812081CD3B1C4001581D3 /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = 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