[GPU] Add support for the BC4/5 texture formats

Ryujinx.Core/OsHle/Services/Nv/INvDrvServices.cs

@@ -316,6 +316,8 @@ namespace Ryujinx.Core.OsHle.Services.Nv
                 int Padding = Reader.ReadInt32();
                 int Offset  = Reader.ReadInt32();
                 int Pages   = Reader.ReadInt32();
+
+                System.Console.WriteLine("remap " + Offset.ToString("x8") + " " + Pages.ToString("x8"));
             }
 
             //TODO

Ryujinx.Graphics/Gal/GalTextureFormat.cs

@@ -7,6 +7,8 @@ namespace Ryujinx.Graphics.Gal
         B5G6R5   = 0x15,
         BC1      = 0x24,
         BC2      = 0x25,
-        BC3      = 0x26
+        BC3      = 0x26,
+        BC4      = 0x27,
+        BC5      = 0x28
     }
 }

Ryujinx.Graphics/Gal/OpenGL/OGLEnumConverter.cs

@@ -74,6 +74,8 @@ namespace Ryujinx.Graphics.Gal.OpenGL
                 case GalTextureFormat.BC1: return PixelInternalFormat.CompressedRgbaS3tcDxt1Ext;
                 case GalTextureFormat.BC2: return PixelInternalFormat.CompressedRgbaS3tcDxt3Ext;
                 case GalTextureFormat.BC3: return PixelInternalFormat.CompressedRgbaS3tcDxt5Ext;
+                case GalTextureFormat.BC4: return PixelInternalFormat.CompressedRedRgtc1;
+                case GalTextureFormat.BC5: return PixelInternalFormat.CompressedRgRgtc2;
             }
 
             throw new NotImplementedException(Format.ToString());

Ryujinx.Graphics/Gal/OpenGL/OGLTexture.cs

@@ -85,9 +85,17 @@ namespace Ryujinx.Graphics.Gal.OpenGL
 
         private static bool IsCompressedTextureFormat(GalTextureFormat Format)
         {
-            return Format == GalTextureFormat.BC1 ||
-                   Format == GalTextureFormat.BC2 ||
-                   Format == GalTextureFormat.BC3;
+            switch (Format)
+            {
+                case GalTextureFormat.BC1:
+                case GalTextureFormat.BC2:
+                case GalTextureFormat.BC3:
+                case GalTextureFormat.BC4:
+                case GalTextureFormat.BC5:
+                    return true;
+            }
+
+            return false;
         }
 
         private int EnsureTextureInitialized(int TexIndex)

Ryujinx.Graphics/Gpu/TextureReader.cs

@@ -16,6 +16,8 @@ namespace Ryujinx.Graphics.Gpu
                 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());