1 files changed, 160 insertions, 0 deletions
diff --git a/Ryujinx.Core/Gpu/TextureReader.cs b/Ryujinx.Core/Gpu/TextureReader.cs
new file mode 100644
index 00000000..f3e41046
--- /dev/null
+++ b/Ryujinx.Core/Gpu/TextureReader.cs
@@ -0,0 +1,160 @@
+using ChocolArm64.Memory;
+using Ryujinx.Graphics.Gal;
+using System;
+
+namespace Ryujinx.Core.Gpu
+{
+    public static class TextureReader
+    {
+        public static byte[] Read(IAMemory Memory, Texture Texture)
+        {
+            switch (Texture.Format)
+            {
+                case GalTextureFormat.A8B8G8R8: return Read4Bpp    (Memory, Texture);
+                case GalTextureFormat.A1B5G5R5: return Read2Bpp    (Memory, Texture);
+                case GalTextureFormat.B5G6R5:   return Read2Bpp    (Memory, Texture);
+                case GalTextureFormat.BC1:      return Read8Bpt4x4 (Memory, Texture);
+                case GalTextureFormat.BC2:      return Read16Bpt4x4(Memory, Texture);
+                case GalTextureFormat.BC3:      return Read16Bpt4x4(Memory, Texture);
+                case GalTextureFormat.BC4:      return Read8Bpt4x4 (Memory, Texture);
+                case GalTextureFormat.BC5:      return Read16Bpt4x4(Memory, Texture);
+            }
+
+            throw new NotImplementedException(Texture.Format.ToString());
+        }
+
+        private unsafe static byte[] Read2Bpp(IAMemory Memory, Texture Texture)
+        {
+            int Width  = Texture.Width;
+            int Height = Texture.Height;
+
+            byte[] Output = new byte[Width * Height * 2];
+
+            ISwizzle Swizzle = TextureHelper.GetSwizzle(Texture, Width, 2);
+
+            (AMemory CpuMem, long Position) = TextureHelper.GetMemoryAndPosition(
+                Memory,
+                Texture.Position);
+
+            fixed (byte* BuffPtr = Output)
+            {
+                long OutOffs = 0;
+
+                for (int Y = 0; Y < Height; Y++)
+                for (int X = 0; X < Width;  X++)
+                {
+                    long Offset = (uint)Swizzle.GetSwizzleOffset(X, Y);
+
+                    short Pixel = CpuMem.ReadInt16Unchecked(Position + Offset);
+
+                    *(short*)(BuffPtr + OutOffs) = Pixel;
+
+                    OutOffs += 2;
+                }
+            }
+
+            return Output;
+        }
+
+        private unsafe static byte[] Read4Bpp(IAMemory Memory, Texture Texture)
+        {
+            int Width  = Texture.Width;
+            int Height = Texture.Height;
+
+            byte[] Output = new byte[Width * Height * 4];
+
+            ISwizzle Swizzle = TextureHelper.GetSwizzle(Texture, Width, 4);
+
+            (AMemory CpuMem, long Position) = TextureHelper.GetMemoryAndPosition(
+                Memory,
+                Texture.Position);
+
+            fixed (byte* BuffPtr = Output)
+            {
+                long OutOffs = 0;
+
+                for (int Y = 0; Y < Height; Y++)
+                for (int X = 0; X < Width;  X++)
+                {
+                    long Offset = (uint)Swizzle.GetSwizzleOffset(X, Y);
+
+                    int Pixel = CpuMem.ReadInt32Unchecked(Position + Offset);
+
+                    *(int*)(BuffPtr + OutOffs) = Pixel;
+
+                    OutOffs += 4;
+                }
+            }
+
+            return Output;
+        }
+
+        private unsafe static byte[] Read8Bpt4x4(IAMemory Memory, Texture Texture)
+        {
+            int Width  = (Texture.Width  + 3) / 4;
+            int Height = (Texture.Height + 3) / 4;
+
+            byte[] Output = new byte[Width * Height * 8];
+
+            ISwizzle Swizzle = TextureHelper.GetSwizzle(Texture, Width, 8);
+
+            (AMemory CpuMem, long Position) = TextureHelper.GetMemoryAndPosition(
+                Memory,
+                Texture.Position);
+
+            fixed (byte* BuffPtr = Output)
+            {
+                long OutOffs = 0;
+
+                for (int Y = 0; Y < Height; Y++)
+                for (int X = 0; X < Width;  X++)
+                {
+                    long Offset = (uint)Swizzle.GetSwizzleOffset(X, Y);
+
+                    long Tile = CpuMem.ReadInt64Unchecked(Position + Offset);
+
+                    *(long*)(BuffPtr + OutOffs) = Tile;
+
+                    OutOffs += 8;
+                }
+            }
+
+            return Output;
+        }
+
+        private unsafe static byte[] Read16Bpt4x4(IAMemory Memory, Texture Texture)
+        {
+            int Width  = (Texture.Width  + 3) / 4;
+            int Height = (Texture.Height + 3) / 4;
+
+            byte[] Output = new byte[Width * Height * 16];
+
+            ISwizzle Swizzle = TextureHelper.GetSwizzle(Texture, Width, 16);
+
+            (AMemory CpuMem, long Position) = TextureHelper.GetMemoryAndPosition(
+                Memory,
+                Texture.Position);
+
+            fixed (byte* BuffPtr = Output)
+            {
+                long OutOffs = 0;
+
+                for (int Y = 0; Y < Height; Y++)
+                for (int X = 0; X < Width;  X++)
+                {
+                    long Offset = (uint)Swizzle.GetSwizzleOffset(X, Y);
+
+                    long Tile0 = CpuMem.ReadInt64Unchecked(Position + Offset + 0);
+                    long Tile1 = CpuMem.ReadInt64Unchecked(Position + Offset + 8);
+
+                    *(long*)(BuffPtr + OutOffs + 0) = Tile0;
+                    *(long*)(BuffPtr + OutOffs + 8) = Tile1;
+
+                    OutOffs += 16;
+                }
+            }
+
+            return Output;
+        }
+    }
+}