synchronous gl debug

src/GLSLEffect.cs

@@ -120,6 +120,9 @@ namespace PoroCYon.FNAGLSL {
 			GL.Init(gd);
 			GL.GetError(); // ignore errors from FNA/mojoshader
 
+			GL.Enable(GL.DEBUG_OUTPUT_SYNCHRONOUS);
+			GL.Throw();
+
 			if (maxTextureSlots < 0) {
 				maxTextureSlots = GL.GetIntegerv(GL.MAX_COMBINED_TEXTURE_IMAGE_UNITS);
 				GL.Throw();

src/GLUtil_Const.cs

@@ -10,6 +10,8 @@ namespace PoroCYon.FNAGLSL {
 			LINK_STATUS     = 0x8B82,
 			CURRENT_PROGRAM = 0x8B8D,
 
+			DEBUG_OUTPUT_SYNCHRONOUS = 0x8242,
+
 			ACTIVE_ATTRIBUTES = 0x8B89,
 			ACTIVE_UNIFORMS   = 0x8B86,
 			INVALID_INDEX     = 0xFFFFFFFFu,

src/GLUtil_GL.cs

@@ -50,6 +50,9 @@ namespace PoroCYon.FNAGLSL {
 			_ActiveTexture = GetProcAddress<ActiveTexture_T>("ActiveTexture");
 			_BindTexture = GetProcAddress<BindTexture_T>("BindTexture");
 
+			_Enable = GetProcAddress<Enable_T>("Enable");
+			_Disable = GetProcAddress<Disable_T>("Disable");
+
 			_Uniform1fv = GetProcAddress<Uniform1fv_T>("Uniform1fv");
 			_Uniform2fv = GetProcAddress<Uniform2fv_T>("Uniform2fv");
 			_Uniform3fv = GetProcAddress<Uniform3fv_T>("Uniform3fv");
@@ -110,6 +113,12 @@ namespace PoroCYon.FNAGLSL {
 			_GetActiveUniformsiv  = null;
 			_GetActiveUniform     = null;
 
+			_ActiveTexture = null;
+			_BindTexture = null;
+
+			_Enable = null;
+			_Disable = null;
+
 			_Uniform1fv = null;
 			_Uniform2fv = null;
 			_Uniform3fv = null;
@@ -598,6 +607,14 @@ namespace PoroCYon.FNAGLSL {
 		public static void BindTexture(GLenum tar, GLuint tex) {
 			_BindTexture(tar, tex);
 		}
+
+		delegate void Enable_T(GLenum cap);
+		static Enable_T _Enable;
+		public static void Enable(GLenum cap) { _Enable(cap); }
+
+		delegate void Disable_T(GLenum cap);
+		static Disable_T _Disable;
+		public static void Disable(GLenum cap) { _Disable(cap); }
 	}
 }