spinning world

UICatalog/Scenarios/Animation.cs

@@ -0,0 +1,192 @@
+using SixLabors.ImageSharp;
+using SixLabors.ImageSharp.ColorSpaces;
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.ImageSharp.Processing;
+using System;
+using System.Collections.Concurrent;
+using System.Collections.Generic;
+using System.IO;
+using System.Reflection;
+using System.Text;
+using System.Threading.Tasks;
+using Terminal.Gui;
+using Attribute = Terminal.Gui.Attribute;
+
+namespace UICatalog.Scenarios {
+	[ScenarioMetadata (Name: "Animation", Description: "Demonstration of how to render animated images with threading.")]
+	[ScenarioCategory ("Colors")]
+	public class Animation : Scenario
+	{
+		private bool isDisposed;
+
+		public override void Setup ()
+		{
+			base.Setup ();
+
+			var x = 0;
+			var y = 0;
+
+			var imageView = new ImageView () {
+				X = x,
+				Y = y++,
+				Width = Dim.Fill(),
+				Height = Dim.Fill(),
+			};
+			Win.Add (imageView);
+
+			var dir = new DirectoryInfo(Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location));
+			
+			var f = new FileInfo(
+				Path.Combine(dir.FullName,"Scenarios","Spinning_globe_dark_small.gif"));
+			if(!f.Exists)
+			{
+				MessageBox.ErrorQuery("Could not find gif","Could not find "+ f.FullName,"Ok");
+				return;
+			}
+
+			imageView.SetImage(Image.Load<Rgba32> (File.ReadAllBytes (f.FullName)));
+
+			Task.Run(()=>{
+				while(!isDisposed)
+				{
+					Application.MainLoop.Invoke(()=>
+					{
+						imageView.NextFrame();
+						imageView.SetNeedsDisplay();
+					});
+
+					Task.Delay(100).Wait();
+				}
+			});
+		}
+
+		protected override void Dispose(bool disposing)
+		{
+			isDisposed = true;
+			base.Dispose();
+		}
+
+		// This is a C# port of https://github.com/andraaspar/bitmap-to-braille by Andraaspar
+
+		/// <summary>
+		/// Renders an image as unicode Braille.
+		/// </summary>
+		public class BitmapToBraille
+		{
+
+			public const int CHAR_WIDTH = 2;
+			public const int CHAR_HEIGHT = 4;
+
+			const string CHARS = " ⠁⠂⠃⠄⠅⠆⠇⡀⡁⡂⡃⡄⡅⡆⡇⠈⠉⠊⠋⠌⠍⠎⠏⡈⡉⡊⡋⡌⡍⡎⡏⠐⠑⠒⠓⠔⠕⠖⠗⡐⡑⡒⡓⡔⡕⡖⡗⠘⠙⠚⠛⠜⠝⠞⠟⡘⡙⡚⡛⡜⡝⡞⡟⠠⠡⠢⠣⠤⠥⠦⠧⡠⡡⡢⡣⡤⡥⡦⡧⠨⠩⠪⠫⠬⠭⠮⠯⡨⡩⡪⡫⡬⡭⡮⡯⠰⠱⠲⠳⠴⠵⠶⠷⡰⡱⡲⡳⡴⡵⡶⡷⠸⠹⠺⠻⠼⠽⠾⠿⡸⡹⡺⡻⡼⡽⡾⡿⢀⢁⢂⢃⢄⢅⢆⢇⣀⣁⣂⣃⣄⣅⣆⣇⢈⢉⢊⢋⢌⢍⢎⢏⣈⣉⣊⣋⣌⣍⣎⣏⢐⢑⢒⢓⢔⢕⢖⢗⣐⣑⣒⣓⣔⣕⣖⣗⢘⢙⢚⢛⢜⢝⢞⢟⣘⣙⣚⣛⣜⣝⣞⣟⢠⢡⢢⢣⢤⢥⢦⢧⣠⣡⣢⣣⣤⣥⣦⣧⢨⢩⢪⢫⢬⢭⢮⢯⣨⣩⣪⣫⣬⣭⣮⣯⢰⢱⢲⢳⢴⢵⢶⢷⣰⣱⣲⣳⣴⣵⣶⣷⢸⢹⢺⢻⢼⢽⢾⢿⣸⣹⣺⣻⣼⣽⣾⣿";
+
+			public int WidthPixels {get; }
+			public int HeightPixels { get; }
+
+			public Func<int,int,bool> PixelIsLit {get;}
+
+			public BitmapToBraille (int widthPixels, int heightPixels, Func<int, int, bool> pixelIsLit)
+			{
+				WidthPixels = widthPixels;
+				HeightPixels = heightPixels;
+				PixelIsLit = pixelIsLit;
+			}
+
+			public string GenerateImage() {
+				int imageHeightChars = (int) Math.Ceiling((double)HeightPixels / CHAR_HEIGHT);
+				int imageWidthChars = (int) Math.Ceiling((double)WidthPixels / CHAR_WIDTH);
+
+				var result = new StringBuilder();
+
+				for (int y = 0; y < imageHeightChars; y++) {
+					
+					for (int x = 0; x < imageWidthChars; x++) {
+						int baseX = x * CHAR_WIDTH;
+						int baseY = y * CHAR_HEIGHT;
+
+						int charIndex = 0;
+						int value = 1;
+
+						for (int charX = 0; charX < CHAR_WIDTH; charX++) {
+							for (int charY = 0; charY < CHAR_HEIGHT; charY++) {
+								int bitmapX = baseX + charX;
+								int bitmapY = baseY + charY;
+								bool pixelExists = bitmapX < WidthPixels && bitmapY < HeightPixels;
+
+								if (pixelExists && PixelIsLit(bitmapX, bitmapY)) {
+									charIndex += value;
+								}
+								value *= 2;
+							}
+						}
+
+						result.Append(CHARS[charIndex]);
+					}
+					result.Append('\n');
+				}
+				return result.ToString().TrimEnd();
+			}  
+		}
+
+		class ImageView : View {
+			private int frameCount;
+			private int currentFrame = 0;
+
+			private Image<Rgba32>[] fullResImages;
+			private Image<Rgba32>[] matchSizes;
+
+			internal void SetImage (Image<Rgba32> image)
+			{
+				frameCount = image.Frames.Count;
+
+				fullResImages = new Image<Rgba32>[frameCount];
+
+				for(int i=0;i<frameCount-1;i++)
+				{
+					fullResImages[i] = image.Frames.ExportFrame(0);
+				}
+				fullResImages[frameCount-1] = image;
+
+				this.SetNeedsDisplay ();
+			}
+			public void NextFrame()
+			{
+				currentFrame = currentFrame+1%frameCount;
+			}
+
+			public override void Redraw (Rect bounds)
+			{
+				base.Redraw (bounds);
+				
+				var lines = GetBraille();
+
+				for(int y = 0; y < lines.Length;y++)
+				{
+					var line = lines[y];
+					for(int x = 0;x<line.Length ;x++)
+					{
+						AddRune(x,y,line[x]);
+					}
+				}
+			}
+
+			private string[] GetBraille ()
+			{
+				var img = fullResImages[currentFrame];
+
+				var braille = new BitmapToBraille(
+					img.Width,
+					img.Height,
+					(x,y)=>IsLit(img,x,y));
+
+				var pix = braille.GenerateImage();
+				return pix.Split('\n');
+			}
+
+			private bool IsLit (Image<Rgba32> img, int x, int y)
+			{
+				var rgb = img[x,y];
+				return rgb.R + rgb.G + rgb.B > 50;
+			}
+		}
+	}
+}

UICatalog/Scenarios/Images.cs

@@ -1,123 +0,0 @@
-using SixLabors.ImageSharp;
-using SixLabors.ImageSharp.ColorSpaces;
-using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.ImageSharp.Processing;
-using System;
-using System.Collections.Concurrent;
-using System.Collections.Generic;
-using System.IO;
-using Terminal.Gui;
-using Attribute = Terminal.Gui.Attribute;
-
-namespace UICatalog.Scenarios {
-	[ScenarioMetadata (Name: "Images", Description: "Demonstration of how to render an image with/without true color support.")]
-	[ScenarioCategory ("Colors")]
-	public class Images : Scenario
-	{
-		public override void Setup ()
-		{
-			base.Setup ();
-
-			var x = 0;
-			var y = 0;
-
-			var canTrueColor = Application.Driver.SupportsTrueColorOutput;
-
-			var lblDriverName = new Label ($"Current driver is {Application.Driver.GetType ().Name}") {
-				X = x,
-				Y = y++
-			};
-			Win.Add (lblDriverName);
-			y++;
-
-			var cbSupportsTrueColor = new CheckBox ("Driver supports true color ") {
-				X = x,
-				Y = y++,
-				Checked = canTrueColor,
-				CanFocus = false
-			};
-			Win.Add (cbSupportsTrueColor);
-
-			var cbUseTrueColor = new CheckBox ("Use true color") {
-				X = x,
-				Y = y++,
-				Checked = Application.Driver.UseTrueColor,
-				Enabled = canTrueColor,
-			};
-			cbUseTrueColor.Toggled += (_) => Application.Driver.UseTrueColor = cbUseTrueColor.Checked;
-			Win.Add (cbUseTrueColor);
-
-			var btnOpenImage = new Button ("Open Image") {
-				X = x,
-				Y = y++
-			};
-			Win.Add (btnOpenImage);
-
-			var imageView = new ImageView () {
-				X = x,
-				Y = y++,
-				Width = Dim.Fill(),
-				Height = Dim.Fill(),
-			};
-			Win.Add (imageView);
-
-			btnOpenImage.Clicked += () => {
-				var ofd = new OpenDialog ("Open Image", "Image");
-				Application.Run (ofd);
-
-				var path = ofd.FilePath.ToString ();
-				
-				if (string.IsNullOrWhiteSpace (path)) {
-					return;
-				}
-
-				if(!File.Exists(path)) {
-					return;
-				}
-
-				imageView.SetImage(Image.Load<Rgba32> (File.ReadAllBytes (path)));
-			};
-		}
-
-		class ImageView : View {
-
-			private Image<Rgba32> fullResImage;
-			private Image<Rgba32> matchSize;
-
-			ConcurrentDictionary<Rgba32, Attribute> cache = new ConcurrentDictionary<Rgba32, Attribute>();
-
-			internal void SetImage (Image<Rgba32> image)
-			{
-				fullResImage = image;
-				this.SetNeedsDisplay ();
-			}
-
-			public override void Redraw (Rect bounds)
-			{
-				base.Redraw (bounds);
-
-				if (fullResImage == null) {
-					return;
-				}	
-
-				// if we have not got a cached resized image of this size
-				if(matchSize == null || bounds.Width != matchSize.Width || bounds.Height != matchSize.Height) {
-
-					// generate one
-					matchSize = fullResImage.Clone (x => x.Resize (bounds.Width, bounds.Height));
-				}
-				
-				for (int y = 0; y < bounds.Height; y++) {
-					for (int x = 0; x < bounds.Width; x++) {
-						var rgb = matchSize [x, y];
-
-						var attr = cache.GetOrAdd (rgb, (rgb) => new Attribute (new TrueColor (), new TrueColor (rgb.R, rgb.G, rgb.B)));
-											
-						Driver.SetAttribute(attr);
-						AddRune (x, y, ' ');
-					}
-				}
-			}
-		}
-	}
-}

UICatalog/UICatalog.csproj

@@ -18,6 +18,9 @@
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|AnyCPU'">
     <DefineConstants>TRACE;DEBUG_IDISPOSABLE</DefineConstants>
   </PropertyGroup>
+  <ItemGroup>
+  <None Update="./Scenarios/Spinning_globe_dark_small.gif" CopyToOutputDirectory="PreserveNewest" />
+  </ItemGroup>
   <ItemGroup>
     <PackageReference Include="SixLabors.ImageSharp" Version="2.1.3" />
     <PackageReference Include="CsvHelper" Version="30.0.1" />