Implement R16 texture format (#147)

Ryujinx.Graphics/Gal/GalTextureFormat.cs

@@ -10,6 +10,7 @@ namespace Ryujinx.Graphics.Gal
         B5G6R5       = 0x15,
         BC7U         = 0x17,
         G8R8         = 0x18,
+        R16          = 0x1b,
         R8           = 0x1d,
         BC1          = 0x24,
         BC2          = 0x25,

Ryujinx.Graphics/Gal/OpenGL/OGLEnumConverter.cs

@@ -66,6 +66,7 @@ namespace Ryujinx.Graphics.Gal.OpenGL
                 case GalTextureFormat.A1B5G5R5:     return (PixelFormat.Rgba, PixelType.UnsignedShort5551);
                 case GalTextureFormat.B5G6R5:       return (PixelFormat.Rgb,  PixelType.UnsignedShort565);
                 case GalTextureFormat.G8R8:         return (PixelFormat.Rg,   PixelType.UnsignedByte);
+                case GalTextureFormat.R16:          return (PixelFormat.Red,  PixelType.HalfFloat);
                 case GalTextureFormat.R8:           return (PixelFormat.Red,  PixelType.UnsignedByte);
             }
 

Ryujinx.HLE/Gpu/TextureHelper.cs

@@ -33,6 +33,7 @@ namespace Ryujinx.HLE.Gpu
                 case GalTextureFormat.A1B5G5R5:     return Texture.Width * Texture.Height * 2;
                 case GalTextureFormat.B5G6R5:       return Texture.Width * Texture.Height * 2;
                 case GalTextureFormat.G8R8:         return Texture.Width * Texture.Height * 2;
+                case GalTextureFormat.R16:          return Texture.Width * Texture.Height * 2;
                 case GalTextureFormat.R8:           return Texture.Width * Texture.Height;
 
                 case GalTextureFormat.BC1:

Ryujinx.HLE/Gpu/TextureReader.cs

@@ -17,6 +17,7 @@ namespace Ryujinx.HLE.Gpu
                 case GalTextureFormat.A1B5G5R5:     return Read5551    (Memory, Texture);
                 case GalTextureFormat.B5G6R5:       return Read565     (Memory, Texture);
                 case GalTextureFormat.G8R8:         return Read2Bpp    (Memory, Texture);
+                case GalTextureFormat.R16:          return Read2Bpp    (Memory, Texture);
                 case GalTextureFormat.R8:           return Read1Bpp    (Memory, Texture);
                 case GalTextureFormat.BC7U:         return Read16Bpt4x4(Memory, Texture);
                 case GalTextureFormat.BC1:          return Read8Bpt4x4 (Memory, Texture);