276 lines
12 KiB
C#
276 lines
12 KiB
C#
using Newtonsoft.Json;
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using SixLabors.ImageSharp;
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using SixLabors.ImageSharp.PixelFormats;
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using SixLabors.ImageSharp.Processing;
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using SixLabors.Primitives;
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using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Linq;
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using System.Security;
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namespace RecrownedAthenaeum.Tools.TextureAtlas
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{
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public class TexturePacker
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{
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private enum SupportedExtensions
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{
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jpeg, jpg, png
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}
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int powLimit;
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Node masterNode;
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Dictionary<string, ImageHandler> imageHandlersDictionary;
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Dictionary<string, NinePatchData> ninePatchDictionary;
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int tpl;
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int TexturePowerLength { get { return tpl; } set { TextureLength = (int)Math.Pow(2, value); tpl = value; } }
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public int TextureLength { get; private set; }
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public int TexturesFound { get { return imageHandlersDictionary.Count; } }
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/// <summary>
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/// Machine to pack multiple textures into one large texture.
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/// </summary>
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/// <param name="rootDirectoryPath">Path to textures.</param>
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/// <param name="powLimit">Power of two limit for auto expanding texture. Default is 12 which is a 4096x4096 texture.</param>
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/// <param name="startingPower">What power to start at and build up from. Default is 8 which is a 256x256 texture.</param>
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internal TexturePacker(string rootDirectoryPath, int powLimit = 12, int startingPower = 8)
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{
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this.powLimit = powLimit;
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string[] paths;
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try
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{
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paths = Directory.GetFiles(rootDirectoryPath);
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}
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catch (IOException)
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{
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throw new ArgumentException("Path " + rootDirectoryPath + " couldn't be resolved.");
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}
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TexturePowerLength = startingPower;
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List<ImageHandler> imageHandlers = new List<ImageHandler>();
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int minAreaRequired = 0;
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for (int pathID = 0; pathID < paths.Length; pathID++)
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{
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SupportedExtensions extension;
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if (Enum.TryParse<SupportedExtensions>(Path.GetExtension(paths[pathID]).ToLower().Substring(1), out extension))
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{
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ImageHandler image = new ImageHandler(paths[pathID]);
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imageHandlers.Add(image);
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minAreaRequired += image.Area;
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while (minAreaRequired > TextureLength * TextureLength)
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{
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TexturePowerLength++;
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}
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}
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else if (Path.GetExtension(paths[pathID]).ToLower() == ".9p")
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{
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if (ninePatchDictionary == null) ninePatchDictionary = new Dictionary<string, NinePatchData>();
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ConsoleUtilities.WriteWrappedLine("Reading ninepatch data for: " + paths[pathID]);
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string serialized = File.ReadAllText(paths[pathID]);
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NinePatchData npData = JsonConvert.DeserializeObject<NinePatchData>(serialized);
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ninePatchDictionary.Add(npData.textureName, npData);
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}
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}
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imageHandlers.Sort();
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this.imageHandlersDictionary = new Dictionary<string, ImageHandler>();
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foreach (ImageHandler imageHandler in imageHandlers)
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{
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this.imageHandlersDictionary.Add(imageHandler.Name, imageHandler);
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}
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}
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/// <summary>
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/// Builds a texture atlas.
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/// </summary>
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/// <param name="AutoCorrectAtlasSize">Whether or not to automatically upscale atlas' texture in the case it is too small. Goes up to 4096 by default.</param>
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public void Build(bool AutoCorrectAtlasSize = true)
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{
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masterNode = new Node();
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masterNode.region.Width = TextureLength;
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masterNode.region.Height = TextureLength;
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Queue<ImageHandler> imageHandlerQueue = new Queue<ImageHandler>(imageHandlersDictionary.Values);
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ImageHandler imageHandler;
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while (imageHandlerQueue.TryDequeue(out imageHandler))
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{
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Node activeNode = null;
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activeNode = masterNode.InsertImageHandler(imageHandler);
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if (activeNode == null)
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{
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if (!AutoCorrectAtlasSize || TexturePowerLength + 1 > powLimit)
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{
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throw new InvalidOperationException("Texture not large enough. Current size: " + TextureLength + "x" + TextureLength + ".");
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}
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TexturePowerLength += 1;
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imageHandlerQueue.Clear();
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Build(AutoCorrectAtlasSize);
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}
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if (ninePatchDictionary.ContainsKey(imageHandler.Name))
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{
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imageHandler.ninePatchData = ninePatchDictionary[imageHandler.Name];
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}
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}
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}
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/// <summary>
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/// Renders the build into a PNG file and generates the respective <see cref="TextureAtlasData"/> meant for serialization and later to be loaded.
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/// </summary>
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/// <param name="output">directory to output to.</param>
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/// <param name="atlasName">name of atlas.</param>
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public void Save(string output, string atlasName)
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{
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GraphicsOptions gOptions = new GraphicsOptions();
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TextureAtlasData.AtlasRegionData[] regions = new TextureAtlasData.AtlasRegionData[imageHandlersDictionary.Count];
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using (Image<Rgba32> atlasTexture = new Image<Rgba32>(TextureLength, TextureLength))
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{
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ImageHandler[] imageHandlers = this.imageHandlersDictionary.Values.ToArray();
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for (int i = 0; i < imageHandlers.Length; i++)
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{
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regions[i] = new TextureAtlasData.AtlasRegionData();
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ImageHandler ih = imageHandlers[i];
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regions[i].SetBounds(ih.x, ih.y, ih.Width, ih.Height);
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regions[i].ninePatchData = ih.ninePatchData;
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regions[i].name = Path.GetFileNameWithoutExtension(ih.Name);
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using (Image<Rgba32> image = Image.Load<Rgba32>(ih.path))
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{
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atlasTexture.Mutate(img => img.DrawImage(gOptions, image, new Point(ih.x, ih.y)));
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}
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}
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Directory.CreateDirectory(output);
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using (FileStream stream = new FileStream(output + "/" + atlasName + ".png", FileMode.Create))
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{
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atlasTexture.SaveAsPng(stream);
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}
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}
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string serialized = JsonConvert.SerializeObject(new TextureAtlasData(atlasName + ".png", regions), Formatting.Indented);
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File.WriteAllText(output + "/" + atlasName + ".tatlas", serialized);
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}
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public void SetNinePatch(string fileName, int a, int b, int c, int d)
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{
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ImageHandler imageHandler = imageHandlersDictionary[fileName];
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NinePatchData ninePatchData = new NinePatchData(fileName, a, b, c, d);
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imageHandler.ninePatchData = ninePatchData;
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}
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public void RemoveNinePatch(string fileName)
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{
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imageHandlersDictionary[fileName].ninePatchData = null;
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}
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private class Node
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{
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public Node parent;
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private Node a, b;
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public Node childA { get { if (a == null) a = new Node(this); return a; } set { value.parent = this; a = value; } }
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public Node childB { get { if (b == null) { b = new Node(this); } return b; } set { value.parent = this; b = value; } }
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public Rectangle region;
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public bool ContainsImage = false;
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public bool CanPlaceImage { get { return (a == null && b == null && !ContainsImage); } }
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public Node(Node parent = null)
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{
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this.parent = parent;
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if (parent != null) region = parent.region;
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}
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/// <summary>
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/// Attempts to insert image within the node. This builds the node to have children if needed.
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/// </summary>
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/// <param name="imageHandler">the image to insert.</param>
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/// <returns>The node the image is placed in.</returns>
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public Node InsertImageHandler(ImageHandler imageHandler)
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{
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if (imageHandler.Width != region.Width)
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{
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if (imageHandler.Width < region.Width)
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{
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if (a == null)
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{
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childA.region.Width = imageHandler.Width;
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}
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Node attemptedNode = null;
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if (!childA.ContainsImage && imageHandler.Width <= childA.region.Width)
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{
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attemptedNode = childA.InsertImageHandler(imageHandler);
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}
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if (attemptedNode == null && !childB.ContainsImage)
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{
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childB.region.Width = region.Width - childA.region.Width;
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childB.region.X = childA.region.X + childA.region.Width;
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attemptedNode = childB.InsertImageHandler(imageHandler);
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}
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return attemptedNode;
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}
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}
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else if (imageHandler.Height != region.Height)
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{
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if (imageHandler.Height < region.Height)
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{
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if (a == null)
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{
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childA.region.Height = imageHandler.Height;
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}
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Node attemptedNode = null;
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if (!childA.ContainsImage && imageHandler.Height <= childA.region.Height)
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{
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attemptedNode = childA.InsertImageHandler(imageHandler);
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}
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if (attemptedNode == null && !childB.ContainsImage)
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{
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childB.region.Height = region.Height - childA.region.Height;
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childB.region.Y = childA.region.Y + childA.region.Height;
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attemptedNode = childB.InsertImageHandler(imageHandler);
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}
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return attemptedNode;
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}
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}
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else if (CanPlaceImage)
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{
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imageHandler.x = region.X;
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imageHandler.y = region.Y;
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ContainsImage = true;
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return this;
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}
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return null;
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}
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}
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private class ImageHandler : IComparable<ImageHandler>
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{
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public readonly string path;
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public readonly IImageInfo image;
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public int Area { get { return image.Width * image.Height; } }
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public string Name { get { return Path.GetFileName(path); } }
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public int Width { get { return image.Width; } }
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public int Height { get { return image.Height; } }
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public int x, y;
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public NinePatchData ninePatchData;
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internal ImageHandler(String path)
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{
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this.path = path;
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try
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{
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using (FileStream stream = new FileStream(path, FileMode.Open))
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{
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image = Image.Identify(stream);
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}
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} catch (SecurityException)
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{
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throw new ArgumentException("Security exception occurred for image: " + path);
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}
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}
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public int CompareTo(ImageHandler tImage)
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{
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return Area - tImage.Area;
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}
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}
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}
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}
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