Fix vertex buffer size on the gpu when the draw vertex count is less than the buffer size, added a few more registers (currently not implemented)

Ryujinx.Graphics/Gal/GalComparisonOp.cs

@@ -0,0 +1,14 @@
+namespace Ryujinx.Graphics.Gal
+{
+    public enum GalComparisonOp
+    {
+        Never    = 0x200,
+        Less     = 0x201,
+        Equal    = 0x202,
+        Lequal   = 0x203,
+        Greater  = 0x204,
+        NotEqual = 0x205,
+        Gequal   = 0x206,
+        Always   = 0x207
+    }
+}

Ryujinx.Graphics/Gal/IGalRasterizer.cs

@@ -8,6 +8,16 @@ namespace Ryujinx.Graphics.Gal
 
         bool IsIboCached(long Key, long DataSize);
 
+        void EnableCullFace();
+
+        void DisableCullFace();
+
+        void EnableDepthTest();
+
+        void DisableDepthTest();
+
+        void SetDepthFunction(GalComparisonOp Func);
+
         void CreateVbo(long Key, byte[] Buffer);
 
         void CreateIbo(long Key, byte[] Buffer);

Ryujinx.Graphics/Gal/OpenGL/OGLEnumConverter.cs

@@ -5,6 +5,17 @@ namespace Ryujinx.Graphics.Gal.OpenGL
 {
     static class OGLEnumConverter
     {
+        public static DepthFunction GetDepthFunc(GalComparisonOp Func)
+        {
+            if ((int)Func >= (int)DepthFunction.Never &&
+                (int)Func <= (int)DepthFunction.Always)
+            {
+                return (DepthFunction)Func;
+            }
+
+            throw new ArgumentException(nameof(Func));
+        }
+
         public static DrawElementsType GetDrawElementsType(GalIndexFormat Format)
         {
             switch (Format)

Ryujinx.Graphics/Gal/OpenGL/OGLRasterizer.cs

@@ -106,6 +106,31 @@ namespace Ryujinx.Graphics.Gal.OpenGL
             return IboCache.TryGetSize(Key, out long Size) && Size == DataSize;
         }
 
+        public void EnableCullFace()
+        {
+            GL.Enable(EnableCap.CullFace);
+        }
+
+        public void DisableCullFace()
+        {
+            GL.Disable(EnableCap.CullFace);
+        }
+
+        public void EnableDepthTest()
+        {
+            GL.Enable(EnableCap.DepthTest);
+        }
+
+        public void DisableDepthTest()
+        {
+            GL.Disable(EnableCap.DepthTest);
+        }
+
+        public void SetDepthFunction(GalComparisonOp Func)
+        {
+            GL.DepthFunc(OGLEnumConverter.GetDepthFunc(Func));
+        }
+
         public void CreateVbo(long Key, byte[] Buffer)
         {
             int Handle = GL.GenBuffer();

Ryujinx.Graphics/Gal/OpenGL/OGLShader.cs

@@ -283,7 +283,7 @@ namespace Ryujinx.Graphics.Gal.OpenGL
 
                 return FreeBinding;
             }
-            
+
             BindUniformBuffersIfNotNull(Current.Vertex);
             BindUniformBuffersIfNotNull(Current.TessControl);
             BindUniformBuffersIfNotNull(Current.TessEvaluation);