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