Add renderer support for matrix uniforms.

OpenRA.FileFormats/Graphics/IGraphicsDevice.cs

@@ -62,6 +62,7 @@ namespace OpenRA.FileFormats.Graphics
 	{
 		void SetVec(string name, float x, float y);
 		void SetTexture(string param, ITexture texture);
+		void SetMatrix(string param, float[] mtx);
 		void Render(Action a);
 	}
 

OpenRA.Renderer.Cg/Shader.cs

@@ -81,5 +81,15 @@ namespace OpenRA.Renderer.Cg
 			if (param != IntPtr.Zero)
 				Tao.Cg.CgGl.cgGLSetParameter2f(param, x, y);
 		}
+
+		public void SetMatrix(string name, float[] mtx)
+		{
+			if (mtx.Length != 16)
+				throw new InvalidDataException("Invalid 4x4 matrix");
+
+			var param = Tao.Cg.Cg.cgGetNamedEffectParameter(effect, name);
+			if (param != IntPtr.Zero)
+				Tao.Cg.CgGl.cgGLSetMatrixParameterfr(param, mtx);
+		}
 	}
 }

OpenRA.Renderer.Gl/Shader.cs

@@ -150,5 +150,18 @@ namespace OpenRA.Renderer.Glsl
 			Gl.glUniform2fARB(param,x,y);
 			ErrorHandler.CheckGlError();
 		}
+
+		public void SetMatrix(string name, float[] mtx)
+		{
+			if (mtx.Length != 16)
+				throw new InvalidDataException("Invalid 4x4 matrix");
+
+			Gl.glUseProgramObjectARB(program);
+			ErrorHandler.CheckGlError();
+			int param = Gl.glGetUniformLocationARB(program, name);
+			ErrorHandler.CheckGlError();
+			Gl.glUniformMatrix4fv(param, 1, Gl.GL_FALSE, mtx);
+			ErrorHandler.CheckGlError();
+		}
 	}
 }

OpenRA.Renderer.Null/NullGraphicsDevice.cs

@@ -60,6 +60,7 @@ namespace OpenRA.Renderer.Null
 	{
 		public void SetVec(string name, float x, float y) { }
 		public void SetTexture(string param, ITexture texture) { }
+		public void SetMatrix(string param, float[] mtx) { }
 		public void Commit() { }
 		public void Render(Action a) { }
 	}