Added ios7 UIImageEffects sample

UIImageEffects/AppDelegate.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using MonoTouch.Foundation;
+using MonoTouch.UIKit;
+
+namespace UIImageEffects
+{
+
+	public class EffectsViewController : UIViewController {
+		UIImageView imageView;
+		UIImage sourceImage;
+
+		public override void ViewDidLoad ()
+		{
+			base.ViewDidLoad ();
+			imageView = new UIImageView (View.Bounds) {
+				UserInteractionEnabled = true
+			};
+			imageView.AddGestureRecognizer (new UITapGestureRecognizer ((x)=> {
+				UpdateImage ();
+			}));
+			View.AddSubview (imageView);
+
+			sourceImage = UIImage.FromBundle ("DisplayImage");
+			Console.WriteLine ("Got: {0}", sourceImage); 
+			UpdateImage ();
+			var alert = new UIAlertView ("Tap to change image effect", "Tap on the change", null, "Dismiss");
+			alert.Show ();
+		}
+
+		int effectIndex;
+
+		void UpdateImage ()
+		{
+	
+			UIImage effectImage;
+
+			if (effectIndex > 5)
+				effectIndex = 0;
+			switch (effectIndex) {
+			case 1:
+				effectImage = sourceImage.ApplyLightEffect ();
+				break;
+			case 2:
+				effectImage = sourceImage.ApplyExtraLightEffect ();
+				break;
+			case 3:
+				effectImage = sourceImage.ApplyDarkEffect ();
+				break;
+			case 4:
+				effectImage = sourceImage.ApplyTintEffect (UIColor.Blue);
+				break;
+			case 5:
+				effectImage = sourceImage.ApplyTintEffect (UIColor.Green);
+				break;
+			case 0:
+			default:
+				effectImage = sourceImage;
+				break;
+			}
+			imageView.Image = effectImage;
+			effectIndex++;
+		}
+	}
+
+	[Register ("AppDelegate")]
+	public partial class AppDelegate : UIApplicationDelegate
+	{
+		UIWindow window;
+
+		public override bool FinishedLaunching (UIApplication app, NSDictionary options)
+		{
+			window = new UIWindow (UIScreen.MainScreen.Bounds);
+			window.RootViewController = new EffectsViewController ();
+			window.MakeKeyAndVisible ();
+			return true;
+		}
+
+		static void Main (string[] args)
+		{
+			UIApplication.Main (args, null, "AppDelegate");
+		}
+	}
+}
+

UIImageEffects/Images.xcassets/AppIcons.appiconset/Contents.json

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+{
+  "images":[ ],
+  "info":{
+    "version":1,
+    "author":"xcode"
+  }
+}

UIImageEffects/Images.xcassets/DisplayImage.imageset/Contents.json

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+{
+  "images": [
+    {
+      "scale": "1x",
+      "idiom": "universal"
+    },
+    {
+      "scale": "2x",
+      "idiom": "universal"
+    },
+    {
+      "filename": "cheetah480.png",
+      "scale": "1x",
+      "idiom": "iphone"
+    },
+    {
+      "filename": "cheetah960.png",
+      "scale": "2x",
+      "idiom": "iphone"
+    },
+    {
+      "filename": "cheetah1136.png",
+      "subtype": "retina4",
+      "scale": "2x",
+      "idiom": "iphone"
+    },
+    {
+      "scale": "1x",
+      "idiom": "ipad"
+    },
+    {
+      "scale": "2x",
+      "idiom": "ipad"
+    }
+  ],
+  "info": {
+    "version": 1,
+    "author": "xcode"
+  }
+}

UIImageEffects/Images.xcassets/LaunchImages.launchimage/Contents.json

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+{
+  "images":[ ],
+  "info":{
+    "version":1,
+    "author":"xcode"
+  }
+}

UIImageEffects/Info.plist

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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>UIDeviceFamily</key>
+	<array>
+		<integer>1</integer>
+	</array>
+	<key>UISupportedInterfaceOrientations</key>
+	<array>
+		<string>UIInterfaceOrientationPortrait</string>
+		<string>UIInterfaceOrientationLandscapeLeft</string>
+		<string>UIInterfaceOrientationLandscapeRight</string>
+	</array>
+	<key>MinimumOSVersion</key>
+	<string>6.0</string>
+</dict>
+</plist>

UIImageEffects/Metadata.xml

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+<?xml version="1.0" encoding="utf-8" ?>
+<SampleMetadata>
+	<ID>508579D3-C90F-4E18-8308-1B2A4CFD6D77</ID>
+	<IsFullApplication>true</IsFullApplication>
+	<Level>Intermediate</Level>
+	<Tags>User Interface, Drawing, Accelerate, Graphics</Tags>
+</SampleMetadata>

UIImageEffects/README.md

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+This is a port of Apple's UIImageEffect sample
+----------------------------------------------
+
+From Apple:
+
+	UIImageEffects shows how to create and apply blur and tint
+	effects to an image using the vImage, Quartz, and UIKit
+	frameworks. The vImage framework is suited for
+	high-performance image processing. Using vImage, y our app
+	gets all the benefits of vector processing without the need
+	for you to write vectorized code.
+	
+Main classes:
+
+	AppDelegate.cs: 
+
+		Sets up the application, loads the image and calls the
+		various filters on each tap.
+
+	UIImageEffect.cs:
+
+		Contains various extension methods that allow the user
+		to blur images and tint those images.  The convenience
+		methods show how to use the API.
+
+Port by Miguel de Icaza

UIImageEffects/UIImageEffects.cs

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+//
+// UIImageEffects.cs: extensio methods on UIImage to lighten, darken, tint and blur images.
+//
+// 
+//
+using System;
+using MonoTouch.UIKit;
+using MonoTouch.Accelerate;
+using System.Diagnostics;
+using System.Drawing;
+using MonoTouch.CoreGraphics;
+
+namespace UIImageEffects
+{
+	public static class UIImageEffects
+	{
+		public static UIImage ApplyLightEffect (this UIImage self)
+		{
+			var tintColor = UIColor.FromWhiteAlpha (1.0f, 0.3f);
+
+			return ApplyBlur (self, blurRadius:30, tintColor:tintColor, saturationDeltaFactor:1.8f, maskImage:null);
+		}
+
+		public static UIImage ApplyExtraLightEffect (this UIImage self)
+		{
+			var tintColor = UIColor.FromWhiteAlpha (0.97f, 0.82f);
+
+			return ApplyBlur (self, blurRadius:20, tintColor:tintColor, saturationDeltaFactor:1.8f, maskImage:null);
+		}
+
+		public static UIImage ApplyDarkEffect (this UIImage self)
+		{
+			var tintColor = UIColor.FromWhiteAlpha (0.11f, 0.73f);
+
+			return ApplyBlur (self, blurRadius:20, tintColor:tintColor, saturationDeltaFactor:1.8f, maskImage:null);
+		}
+
+		public static UIImage ApplyTintEffect (this UIImage self, UIColor tintColor)
+		{
+			const float EffectColorAlpha = 0.6f;
+			var effectColor = tintColor;
+			float alpha;
+			var componentCount = tintColor.CGColor.NumberOfComponents;
+			if (componentCount == 2) {
+				float white;
+				if (tintColor.GetWhite (out white, out alpha))
+					effectColor = UIColor.FromWhiteAlpha (white, EffectColorAlpha);
+			} else {
+				try {
+					float r, g, b;
+					tintColor.GetRGBA (out r, out g, out b, out alpha);
+					effectColor = UIColor.FromRGBA (r, g, b, EffectColorAlpha);
+				} catch {
+				}
+			}
+			return ApplyBlur (self, blurRadius: 10, tintColor: effectColor, saturationDeltaFactor: -1, maskImage: null);
+		}
+
+		public unsafe static UIImage ApplyBlur (UIImage image, float blurRadius, UIColor tintColor, float saturationDeltaFactor, UIImage maskImage)
+		{
+			if (image.Size.Width < 1 || image.Size.Height < 1) {
+				Debug.WriteLine (@"*** error: invalid size: ({0} x {1}). Both dimensions must be >= 1: {2}", image.Size.Width, image.Size.Height, image);
+				return null;
+			}
+			if (image.CGImage == null) {
+				Debug.WriteLine (@"*** error: image must be backed by a CGImage: {0}", image);
+				return null;
+			}
+			if (maskImage != null && maskImage.CGImage == null) {
+				Debug.WriteLine (@"*** error: maskImage must be backed by a CGImage: {0}", maskImage);
+				return null;
+			}
+
+			var imageRect = new RectangleF (PointF.Empty, image.Size);
+			var effectImage = image;
+
+			bool hasBlur = blurRadius > float.Epsilon;
+			bool hasSaturationChange = Math.Abs (saturationDeltaFactor - 1) > float.Epsilon;
+
+			if (hasBlur || hasSaturationChange) {
+				UIGraphics.BeginImageContextWithOptions (image.Size, false, UIScreen.MainScreen.Scale);
+				var contextIn = UIGraphics.GetCurrentContext ();
+				contextIn.ScaleCTM (1.0f, -1.0f);
+				contextIn.TranslateCTM (0, -image.Size.Height);
+				contextIn.DrawImage (imageRect, image.CGImage);
+				var effectInContext = contextIn.AsBitmapContext () as CGBitmapContext;
+
+				var effectInBuffer = new vImageBuffer () {
+					Data = effectInContext.Data,
+					Width = effectInContext.Width,
+					Height = effectInContext.Height,
+					BytesPerRow = effectInContext.BytesPerRow
+				};
+
+				UIGraphics.BeginImageContextWithOptions (image.Size, false, UIScreen.MainScreen.Scale);
+				var effectOutContext = UIGraphics.GetCurrentContext ().AsBitmapContext () as CGBitmapContext;				
+				var effectOutBuffer = new vImageBuffer () {
+					Data = effectOutContext.Data,
+					Width = effectOutContext.Width,
+					Height = effectOutContext.Height,
+					BytesPerRow = effectOutContext.BytesPerRow
+				};
+
+				if (hasBlur) {
+					var inputRadius = blurRadius * UIScreen.MainScreen.Scale;
+					uint radius = (uint)(Math.Floor (inputRadius * 3 * Math.Sqrt (2 * Math.PI) / 4 + 0.5));
+					if ((radius % 2) != 1)
+						radius += 1;
+					vImage.BoxConvolveARGB8888 (ref effectInBuffer, ref effectOutBuffer, IntPtr.Zero, 0, 0, radius, radius, Pixel8888.Zero, vImageFlags.EdgeExtend);
+					vImage.BoxConvolveARGB8888 (ref effectOutBuffer, ref effectInBuffer, IntPtr.Zero, 0, 0, radius, radius, Pixel8888.Zero, vImageFlags.EdgeExtend);
+					vImage.BoxConvolveARGB8888 (ref effectInBuffer, ref effectOutBuffer, IntPtr.Zero, 0, 0, radius, radius, Pixel8888.Zero, vImageFlags.EdgeExtend);
+				}
+				bool effectImageBuffersAreSwapped = false;
+				if (hasSaturationChange) {
+					var s = saturationDeltaFactor;
+					var floatingPointSaturationMatrix = new float [] {
+						0.0722f + 0.9278f * s,  0.0722f - 0.0722f * s,  0.0722f - 0.0722f * s,  0,
+						0.7152f - 0.7152f * s,  0.7152f + 0.2848f * s,  0.7152f - 0.7152f * s,  0,
+						0.2126f - 0.2126f * s,  0.2126f - 0.2126f * s,  0.2126f + 0.7873f * s,  0,
+						0,                    0,                    0,  1,
+					};
+					const int divisor = 256;
+					var saturationMatrix = new short [floatingPointSaturationMatrix.Length];
+					for (int i = 0; i < saturationMatrix.Length; i++)
+						saturationMatrix [i] = (short)Math.Round (floatingPointSaturationMatrix [i] * divisor);
+					if (hasBlur) {
+						vImage.MatrixMultiplyARGB8888 (ref effectOutBuffer, ref effectInBuffer, saturationMatrix, divisor, null, null, vImageFlags.NoFlags);
+						effectImageBuffersAreSwapped = true;
+					} else
+						vImage.MatrixMultiplyARGB8888 (ref effectInBuffer, ref effectOutBuffer, saturationMatrix, divisor, null, null, vImageFlags.NoFlags);
+				}
+				if (!effectImageBuffersAreSwapped)
+					effectImage = UIGraphics.GetImageFromCurrentImageContext ();
+				UIGraphics.EndImageContext ();
+				if (effectImageBuffersAreSwapped)
+					effectImage = UIGraphics.GetImageFromCurrentImageContext ();
+				UIGraphics.EndImageContext ();
+			}
+
+			// Setup up output context
+			UIGraphics.BeginImageContextWithOptions (image.Size, false, UIScreen.MainScreen.Scale);
+			var outputContext = UIGraphics.GetCurrentContext ();
+			outputContext.ScaleCTM (1, -1);
+			outputContext.TranslateCTM (0, -image.Size.Height);
+
+			// Draw base image
+			if (hasBlur) {
+				outputContext.SaveState ();
+				if (maskImage != null)
+					outputContext.ClipToMask (imageRect, maskImage.CGImage);
+				outputContext.DrawImage (imageRect, effectImage.CGImage);
+				outputContext.RestoreState ();
+			}
+
+			if (tintColor != null) {
+				outputContext.SaveState ();
+				outputContext.SetFillColor (tintColor.CGColor);
+				outputContext.FillRect (imageRect);
+				outputContext.RestoreState ();
+			}
+			var outputImage = UIGraphics.GetImageFromCurrentImageContext ();
+			UIGraphics.EndImageContext ();
+			return outputImage;
+		}
+	}
+}
+

UIImageEffects/UIImageEffects.csproj

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+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">iPhoneSimulator</Platform>
+    <ProductVersion>10.0.0</ProductVersion>
+    <SchemaVersion>2.0</SchemaVersion>
+    <ProjectGuid>{CBD5A17E-2279-413A-B2C2-CB99EC2263B2}</ProjectGuid>
+    <ProjectTypeGuids>{6BC8ED88-2882-458C-8E55-DFD12B67127B};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>
+    <OutputType>Exe</OutputType>
+    <RootNamespace>UIImageEffects</RootNamespace>
+    <IPhoneResourcePrefix>Resources</IPhoneResourcePrefix>
+    <AssemblyName>UIImageEffects</AssemblyName>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|iPhoneSimulator' ">
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>full</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\iPhoneSimulator\Debug</OutputPath>
+    <DefineConstants>DEBUG;</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+    <MtouchLink>None</MtouchLink>
+    <ConsolePause>false</ConsolePause>
+    <MtouchDebug>true</MtouchDebug>
+    <MtouchI18n>
+    </MtouchI18n>
+    <MtouchArch>ARMv7</MtouchArch>
+    <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|iPhoneSimulator' ">
+    <DebugType>full</DebugType>
+    <Optimize>true</Optimize>
+    <OutputPath>bin\iPhoneSimulator\Release</OutputPath>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+    <MtouchLink>None</MtouchLink>
+    <ConsolePause>false</ConsolePause>
+    <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|iPhone' ">
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>full</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\iPhone\Debug</OutputPath>
+    <DefineConstants>DEBUG;</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+    <MtouchDebug>true</MtouchDebug>
+    <ConsolePause>false</ConsolePause>
+    <CodesignKey>iPhone Developer</CodesignKey>
+    <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|iPhone' ">
+    <DebugType>full</DebugType>
+    <Optimize>true</Optimize>
+    <OutputPath>bin\iPhone\Release</OutputPath>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+    <CodesignKey>iPhone Developer</CodesignKey>
+    <ConsolePause>false</ConsolePause>
+    <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Ad-Hoc|iPhone' ">
+    <DebugType>full</DebugType>
+    <Optimize>true</Optimize>
+    <OutputPath>bin\iPhone\Ad-Hoc</OutputPath>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+    <CodesignKey>iPhone Distribution</CodesignKey>
+    <BuildIpa>true</BuildIpa>
+    <ConsolePause>false</ConsolePause>
+    <CodesignProvision>Automatic:AdHoc</CodesignProvision>
+    <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'AppStore|iPhone' ">
+    <DebugType>full</DebugType>
+    <Optimize>true</Optimize>
+    <OutputPath>bin\iPhone\AppStore</OutputPath>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+    <CodesignKey>iPhone Distribution</CodesignKey>
+    <ConsolePause>false</ConsolePause>
+    <CodesignProvision>Automatic:AppStore</CodesignProvision>
+    <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
+  </PropertyGroup>
+  <ItemGroup>
+    <Reference Include="System" />
+    <Reference Include="System.Xml" />
+    <Reference Include="System.Core" />
+    <Reference Include="monotouch" />
+  </ItemGroup>
+  <ItemGroup>
+    <Folder Include="Resources\" />
+    <Folder Include="Images.xcassets\DisplayImage\" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="Info.plist" />
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="AppDelegate.cs" />
+    <Compile Include="UIImageEffects.cs" />
+  </ItemGroup>
+  <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
+  <ItemGroup>
+    <ImageAsset Include="Images.xcassets\AppIcons.appiconset\Contents.json" />
+    <ImageAsset Include="Images.xcassets\LaunchImages.launchimage\Contents.json" />
+    <ImageAsset Include="Images.xcassets\DisplayImage.imageset\Contents.json" />
+    <ImageAsset Include="Images.xcassets\DisplayImage.imageset\cheetah480.png" />
+    <ImageAsset Include="Images.xcassets\DisplayImage.imageset\cheetah960.png" />
+    <ImageAsset Include="Images.xcassets\DisplayImage.imageset\cheetah1136.png" />
+  </ItemGroup>
+</Project>

UIImageEffects/UIImageEffects.sln

@@ -0,0 +1,32 @@
+
+Microsoft Visual Studio Solution File, Format Version 11.00
+# Visual Studio 2010
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "UIImageEffects", "UIImageEffects.csproj", "{CBD5A17E-2279-413A-B2C2-CB99EC2263B2}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|iPhoneSimulator = Debug|iPhoneSimulator
+		Release|iPhoneSimulator = Release|iPhoneSimulator
+		Debug|iPhone = Debug|iPhone
+		Release|iPhone = Release|iPhone
+		Ad-Hoc|iPhone = Ad-Hoc|iPhone
+		AppStore|iPhone = AppStore|iPhone
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{CBD5A17E-2279-413A-B2C2-CB99EC2263B2}.Ad-Hoc|iPhone.ActiveCfg = Ad-Hoc|iPhone
+		{CBD5A17E-2279-413A-B2C2-CB99EC2263B2}.Ad-Hoc|iPhone.Build.0 = Ad-Hoc|iPhone
+		{CBD5A17E-2279-413A-B2C2-CB99EC2263B2}.AppStore|iPhone.ActiveCfg = AppStore|iPhone
+		{CBD5A17E-2279-413A-B2C2-CB99EC2263B2}.AppStore|iPhone.Build.0 = AppStore|iPhone
+		{CBD5A17E-2279-413A-B2C2-CB99EC2263B2}.Debug|iPhone.ActiveCfg = Debug|iPhone
+		{CBD5A17E-2279-413A-B2C2-CB99EC2263B2}.Debug|iPhone.Build.0 = Debug|iPhone
+		{CBD5A17E-2279-413A-B2C2-CB99EC2263B2}.Debug|iPhoneSimulator.ActiveCfg = Debug|iPhoneSimulator
+		{CBD5A17E-2279-413A-B2C2-CB99EC2263B2}.Debug|iPhoneSimulator.Build.0 = Debug|iPhoneSimulator
+		{CBD5A17E-2279-413A-B2C2-CB99EC2263B2}.Release|iPhone.ActiveCfg = Release|iPhone
+		{CBD5A17E-2279-413A-B2C2-CB99EC2263B2}.Release|iPhone.Build.0 = Release|iPhone
+		{CBD5A17E-2279-413A-B2C2-CB99EC2263B2}.Release|iPhoneSimulator.ActiveCfg = Release|iPhoneSimulator
+		{CBD5A17E-2279-413A-B2C2-CB99EC2263B2}.Release|iPhoneSimulator.Build.0 = Release|iPhoneSimulator
+	EndGlobalSection
+	GlobalSection(MonoDevelopProperties) = preSolution
+		StartupItem = UIImageEffects.csproj
+	EndGlobalSection
+EndGlobal