More OO-like. a bit easier to read/use things

hexworld/Util/Program.cs

@@ -0,0 +1,63 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using OpenTK.Graphics.OpenGL4;
+
+namespace hexworld.Util
+{
+    public class Program : GLObject
+    {
+        private Dictionary<string, int> uniforms = new Dictionary<string, int>();
+        private Dictionary<string, int> attributes = new Dictionary<string, int>();
+
+        public string Log => GL.GetProgramInfoLog((int) Id);
+
+        public Program()
+            : base((uint) GL.CreateProgram())
+        {
+        }
+
+        public void Attach(Shader shader) => GL.AttachShader(Id, shader.Id);
+
+        public bool Link()
+        {
+            uniforms.Clear();
+            attributes.Clear();
+            GL.LinkProgram(Id);
+            GL.GetProgram(Id, GetProgramParameterName.LinkStatus, out int success);
+            if (success == 0) return false;
+
+            GL.GetProgram(Id, GetProgramParameterName.ActiveUniforms, out int uniformcount);
+            for (var i = 0; i < uniformcount; i++)
+            {
+                var sb = new StringBuilder(256);
+                GL.GetActiveUniformName((int) Id, i, sb.Capacity, out int length, sb);
+                uniforms[sb.ToString()] = i;
+            }
+
+            GL.GetProgram(Id, GetProgramParameterName.ActiveAttributes, out int attributecount);
+            for (var i = 0; i < attributecount; i++)
+            {
+                var sb = new StringBuilder(256);
+                GL.GetActiveAttrib((int) Id, i, sb.Capacity, out int length, out int size,
+                    out ActiveAttribType type, sb);
+                attributes[sb.ToString()] = i;
+            }
+
+            return true;
+        }
+
+        public int GetUniform(string name)
+        {
+            if (!uniforms.TryGetValue(name, out int id))
+                throw new ShaderException($"Shader Program {Id} does not contain uniform '{name}'");
+            else return id;
+        }
+
+        public void Use() => GL.UseProgram(Id);
+
+        public static void UseDefault() => GL.UseProgram(0);
+    }
+}