diff options
Diffstat (limited to 'NesTiler/ColorFinder.cs')
| -rw-r--r-- | NesTiler/ColorFinder.cs | 388 |
1 files changed, 194 insertions, 194 deletions
diff --git a/NesTiler/ColorFinder.cs b/NesTiler/ColorFinder.cs index 257e9b1..0a615cb 100644 --- a/NesTiler/ColorFinder.cs +++ b/NesTiler/ColorFinder.cs @@ -1,194 +1,194 @@ -using SkiaSharp; -using System; -using System.Collections.Generic; -using System.Diagnostics; -using System.Drawing; -using System.IO; -using System.Linq; -using System.Text.Json; - -namespace com.clusterrr.Famicom.NesTiler -{ - class ColorFinder - { - static byte[] FORBIDDEN_COLORS = { 0x0D, 0x0E, 0x0F, 0x1E, 0x1F, 0x2E, 0x2F, 0x3E, 0x3F }; - - public readonly Dictionary<byte, SKColor> Colors; - private readonly Dictionary<SKColor, byte> cache = new(); - - public ColorFinder(string filename) - { - this.Colors = LoadColors(filename); - } - - private static Dictionary<byte, SKColor> LoadColors(string filename) - { - Trace.WriteLine($"Loading colors from {filename}..."); - if (!File.Exists(filename)) throw new FileNotFoundException($"Could not find file '{filename}'.", filename); - var data = File.ReadAllBytes(filename); - Dictionary<byte, SKColor> nesColors; - // Detect file type - if ((Path.GetExtension(filename) == ".pal") || ((data.Length == 192 || data.Length == 1536) && data.Where(b => b >= 128).Any())) - { - // Binary file - nesColors = new Dictionary<byte, SKColor>(); - for (byte c = 0; c < 64; c++) - { - var color = new SKColor(data[c * 3], data[(c * 3) + 1], data[(c * 3) + 2]); - nesColors[c] = color; - } - } - else - { - var paletteJson = File.ReadAllText(filename); - var nesColorsStr = JsonSerializer.Deserialize<Dictionary<string, string>>(paletteJson); - if (nesColorsStr == null) throw new InvalidDataException($"Can't parse {filename}"); - nesColors = nesColorsStr.ToDictionary( - kv => - { - try - { - var index = kv.Key.ToLower().StartsWith("0x") ? Convert.ToByte(kv.Key.Substring(2), 16) : byte.Parse(kv.Key); - if (FORBIDDEN_COLORS.Contains(index)) - Trace.WriteLine($"WARNING! color #{kv.Key} is forbidden color, it will be ignored."); - if (index > 0x3F) throw new ArgumentException($"{kv.Key} - invalid color index.", filename); - return index; - } - catch (Exception ex) when (ex is FormatException || ex is OverflowException) - { - throw new ArgumentException($"{kv.Key} - invalid color index.", filename); - } - }, - kv => - { - try - { - var color = ColorTranslator.FromHtml(kv.Value); ; - return new SKColor(color.R, color.G, color.B); - } - catch (FormatException) - { - throw new ArgumentException($"{kv.Value} - invalid color.", filename); - } - } - ); - } - // filter out invalid colors; - nesColors = nesColors.Where(kv => !FORBIDDEN_COLORS.Contains(kv.Key)).ToDictionary(kv => kv.Key, kv => kv.Value); - return nesColors; - } - - /// <summary> - /// Find index of most similar color from NES colors - /// </summary> - /// <param name="color">Input color</param> - /// <returns>Output color index</returns> - public byte FindSimilarColorIndex(SKColor color) - { - if (cache.ContainsKey(color)) - return cache[color]; - byte result = byte.MaxValue; - double minDelta = double.MaxValue; - SKColor c = SKColors.Transparent; - foreach (var index in Colors.Keys) - { - var delta = color.GetDelta(Colors[index]); - if (delta < minDelta) - { - minDelta = delta; - result = index; - c = Colors[index]; - } - } - if (result == byte.MaxValue) - throw new KeyNotFoundException($"Invalid color: {color}."); - if (cache != null) - cache[color] = result; - return result; - } - - /// <summary> - /// Find most similar color from list of colors - /// </summary> - /// <param name="colors">Haystack</param> - /// <param name="color">Niddle</param> - /// <returns>Output color</returns> - public SKColor FindSimilarColor(IEnumerable<SKColor> colors, SKColor color) - { - SKColor result = SKColors.Black; - double minDelta = double.MaxValue; - foreach (var c in colors) - { - var delta = color.GetDelta(c); - if (delta < minDelta) - { - minDelta = delta; - result = c; - } - } - return result; - } - - /// <summary> - /// Find most similar color from NES colors - /// </summary> - /// <param name="color">Input colo</param> - /// <returns>Output color</returns> - public SKColor FindSimilarColor(SKColor color) => Colors[FindSimilarColorIndex(color)]; - - public void WriteColorsTable(string filename) - { - // Export colors to nice table image - const int colorSize = 64; - const int colorColumns = 16; - const int colorRows = 4; - const int strokeWidth = 5; - float textSize = 20; - float textYOffset = 39; - using var image = new SKBitmap(colorSize * colorColumns, colorSize * colorRows); - using var canvas = new SKCanvas(image); - for (int y = 0; y < colorRows; y++) - { - for (int x = 0; x < colorColumns; x++) - { - SKColor color; - SKPaint paint; - if (Colors.TryGetValue((byte)((y * colorColumns) + x), out color)) - { - paint = new SKPaint() { Color = color }; - canvas.DrawRegion(new SKRegion(new SKRectI(x * colorSize, y * colorSize, (x + 1) * colorSize, (y + 1) * colorSize)), paint); - - color = new SKColor((byte)(0xFF - color.Red), (byte)(0xFF - color.Green), (byte)(0xFF - color.Blue)); // invert color - paint = new SKPaint() - { - Color = color, - TextAlign = SKTextAlign.Center, - TextSize = textSize, - FilterQuality = SKFilterQuality.High, - IsAntialias = true - }; - canvas.DrawText($"{(y * colorColumns) + x:X02}", (x * colorSize) + (colorSize / 2), (y * colorSize) + textYOffset, paint); - } - else - { - paint = new SKPaint() { Color = SKColors.Black }; - SKPath path = new SKPath(); - canvas.DrawRegion(new SKRegion(new SKRectI(x * colorSize, y * colorSize, (x + 1) * colorSize, (y + 1) * colorSize)), paint); - paint = new SKPaint() - { - Color = SKColors.Red, - Style = SKPaintStyle.Stroke, - StrokeCap = SKStrokeCap.Round, - StrokeWidth = strokeWidth, - FilterQuality = SKFilterQuality.High, - IsAntialias = true - }; - canvas.DrawLine((x * colorSize) + strokeWidth, (y * colorSize) + strokeWidth, ((x + 1) * colorSize) - strokeWidth, ((y + 1) * colorSize) - strokeWidth, paint); - canvas.DrawLine(((x + 1) * colorSize) - strokeWidth, (y * colorSize) + strokeWidth, (x * colorSize) + strokeWidth, ((y + 1) * colorSize) - strokeWidth, paint); - } - }; - } - File.WriteAllBytes(filename, image.Encode(SKEncodedImageFormat.Png, 0).ToArray()); - } - } -} +using SkiaSharp;
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Drawing;
+using System.IO;
+using System.Linq;
+using System.Text.Json;
+
+namespace com.clusterrr.Famicom.NesTiler
+{
+ class ColorFinder
+ {
+ static byte[] FORBIDDEN_COLORS = { 0x0D, 0x0E, 0x0F, 0x1E, 0x1F, 0x2E, 0x2F, 0x3E, 0x3F };
+
+ public readonly Dictionary<byte, SKColor> Colors;
+ private readonly Dictionary<SKColor, byte> cache = new();
+
+ public ColorFinder(string filename)
+ {
+ this.Colors = LoadColors(filename);
+ }
+
+ private static Dictionary<byte, SKColor> LoadColors(string filename)
+ {
+ Trace.WriteLine($"Loading colors from {filename}...");
+ if (!File.Exists(filename)) throw new FileNotFoundException($"Could not find file '{filename}'.", filename);
+ var data = File.ReadAllBytes(filename);
+ Dictionary<byte, SKColor> nesColors;
+ // Detect file type
+ if ((Path.GetExtension(filename) == ".pal") || ((data.Length == 192 || data.Length == 1536) && data.Where(b => b >= 128).Any()))
+ {
+ // Binary file
+ nesColors = new Dictionary<byte, SKColor>();
+ for (byte c = 0; c < 64; c++)
+ {
+ var color = new SKColor(data[c * 3], data[(c * 3) + 1], data[(c * 3) + 2]);
+ nesColors[c] = color;
+ }
+ }
+ else
+ {
+ var paletteJson = File.ReadAllText(filename);
+ var nesColorsStr = JsonSerializer.Deserialize<Dictionary<string, string>>(paletteJson);
+ if (nesColorsStr == null) throw new InvalidDataException($"Can't parse {filename}");
+ nesColors = nesColorsStr.ToDictionary(
+ kv =>
+ {
+ try
+ {
+ var index = kv.Key.ToLower().StartsWith("0x") ? Convert.ToByte(kv.Key.Substring(2), 16) : byte.Parse(kv.Key);
+ if (FORBIDDEN_COLORS.Contains(index))
+ Trace.WriteLine($"WARNING! color #{kv.Key} is forbidden color, it will be ignored.");
+ if (index > 0x3F) throw new ArgumentException($"{kv.Key} - invalid color index.", filename);
+ return index;
+ }
+ catch (Exception ex) when (ex is FormatException || ex is OverflowException)
+ {
+ throw new ArgumentException($"{kv.Key} - invalid color index.", filename);
+ }
+ },
+ kv =>
+ {
+ try
+ {
+ var color = ColorTranslator.FromHtml(kv.Value); ;
+ return new SKColor(color.R, color.G, color.B);
+ }
+ catch (FormatException)
+ {
+ throw new ArgumentException($"{kv.Value} - invalid color.", filename);
+ }
+ }
+ );
+ }
+ // filter out invalid colors;
+ nesColors = nesColors.Where(kv => !FORBIDDEN_COLORS.Contains(kv.Key)).ToDictionary(kv => kv.Key, kv => kv.Value);
+ return nesColors;
+ }
+
+ /// <summary>
+ /// Find index of most similar color from NES colors
+ /// </summary>
+ /// <param name="color">Input color</param>
+ /// <returns>Output color index</returns>
+ public byte FindSimilarColorIndex(SKColor color)
+ {
+ if (cache.ContainsKey(color))
+ return cache[color];
+ byte result = byte.MaxValue;
+ double minDelta = double.MaxValue;
+ SKColor c = SKColors.Transparent;
+ foreach (var index in Colors.Keys)
+ {
+ var delta = color.GetDelta(Colors[index]);
+ if (delta < minDelta)
+ {
+ minDelta = delta;
+ result = index;
+ c = Colors[index];
+ }
+ }
+ if (result == byte.MaxValue)
+ throw new KeyNotFoundException($"Invalid color: {color}.");
+ if (cache != null)
+ cache[color] = result;
+ return result;
+ }
+
+ /// <summary>
+ /// Find most similar color from list of colors
+ /// </summary>
+ /// <param name="colors">Haystack</param>
+ /// <param name="color">Niddle</param>
+ /// <returns>Output color</returns>
+ public SKColor FindSimilarColor(IEnumerable<SKColor> colors, SKColor color)
+ {
+ SKColor result = SKColors.Black;
+ double minDelta = double.MaxValue;
+ foreach (var c in colors)
+ {
+ var delta = color.GetDelta(c);
+ if (delta < minDelta)
+ {
+ minDelta = delta;
+ result = c;
+ }
+ }
+ return result;
+ }
+
+ /// <summary>
+ /// Find most similar color from NES colors
+ /// </summary>
+ /// <param name="color">Input colo</param>
+ /// <returns>Output color</returns>
+ public SKColor FindSimilarColor(SKColor color) => Colors[FindSimilarColorIndex(color)];
+
+ public void WriteColorsTable(string filename)
+ {
+ // Export colors to nice table image
+ const int colorSize = 64;
+ const int colorColumns = 16;
+ const int colorRows = 4;
+ const int strokeWidth = 5;
+ float textSize = 20;
+ float textYOffset = 39;
+ using var image = new SKBitmap(colorSize * colorColumns, colorSize * colorRows);
+ using var canvas = new SKCanvas(image);
+ for (int y = 0; y < colorRows; y++)
+ {
+ for (int x = 0; x < colorColumns; x++)
+ {
+ SKColor color;
+ SKPaint paint;
+ if (Colors.TryGetValue((byte)((y * colorColumns) + x), out color))
+ {
+ paint = new SKPaint() { Color = color };
+ canvas.DrawRegion(new SKRegion(new SKRectI(x * colorSize, y * colorSize, (x + 1) * colorSize, (y + 1) * colorSize)), paint);
+
+ color = new SKColor((byte)(0xFF - color.Red), (byte)(0xFF - color.Green), (byte)(0xFF - color.Blue)); // invert color
+ paint = new SKPaint()
+ {
+ Color = color,
+ TextAlign = SKTextAlign.Center,
+ TextSize = textSize,
+ FilterQuality = SKFilterQuality.High,
+ IsAntialias = true
+ };
+ canvas.DrawText($"{(y * colorColumns) + x:X02}", (x * colorSize) + (colorSize / 2), (y * colorSize) + textYOffset, paint);
+ }
+ else
+ {
+ paint = new SKPaint() { Color = SKColors.Black };
+ SKPath path = new SKPath();
+ canvas.DrawRegion(new SKRegion(new SKRectI(x * colorSize, y * colorSize, (x + 1) * colorSize, (y + 1) * colorSize)), paint);
+ paint = new SKPaint()
+ {
+ Color = SKColors.Red,
+ Style = SKPaintStyle.Stroke,
+ StrokeCap = SKStrokeCap.Round,
+ StrokeWidth = strokeWidth,
+ FilterQuality = SKFilterQuality.High,
+ IsAntialias = true
+ };
+ canvas.DrawLine((x * colorSize) + strokeWidth, (y * colorSize) + strokeWidth, ((x + 1) * colorSize) - strokeWidth, ((y + 1) * colorSize) - strokeWidth, paint);
+ canvas.DrawLine(((x + 1) * colorSize) - strokeWidth, (y * colorSize) + strokeWidth, (x * colorSize) + strokeWidth, ((y + 1) * colorSize) - strokeWidth, paint);
+ }
+ };
+ }
+ File.WriteAllBytes(filename, image.Encode(SKEncodedImageFormat.Png, 0).ToArray());
+ }
+ }
+}
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