Initial commit

LibDgf.Graphics/Aqualead/Image/Conversion/PngConverter.cs

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+using LibDgf.Aqualead.Image;
+using SixLabors.ImageSharp;
+using SixLabors.ImageSharp.PixelFormats;
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Text;
+
+namespace LibDgf.Aqualead.Image.Conversion
+{
+    public class PngConverter : IAlImageConverter
+    {
+        public string FileExtension => ".png";
+
+        public void ConvertFromAl(AlImage image, Stream destStream)
+        {
+            // Only grab the first mip
+            var pixels = image.Mipmaps[0];
+            using (MemoryStream ms = new MemoryStream(pixels))
+            {
+                BinaryReader br = new BinaryReader(ms);
+                using (var img = ConvertBgra32(br, (int)image.Width, (int)image.Height))
+                {
+                    img.SaveAsPng(destStream);
+                }
+            }
+        }
+
+        public bool CanConvert(string pixelFormat)
+        {
+            return pixelFormat == "BGRA";
+        }
+
+        public static Image<Bgra32> ConvertBgra32(BinaryReader br, int width, int height)
+        {
+            Image<Bgra32> img = new Image<Bgra32>(width, height);
+            for (int y = 0; y < height; ++y)
+            {
+                var row = img.GetPixelRowSpan(y);
+                for (int x = 0; x < width; ++x)
+                {
+                    byte b = br.ReadByte();
+                    byte g = br.ReadByte();
+                    byte r = br.ReadByte();
+                    byte a = br.ReadByte();
+                    row[x] = new Bgra32(r, g, b, a);
+                }
+            }
+            return img;
+        }
+
+        public void ConvertFromAlAlt(AlImage image, Stream destStream)
+        {
+            throw new NotSupportedException();
+        }
+
+        public bool HasAlternativeFile(AlImage image)
+        {
+            return false;
+        }
+    }
+}