ShaderProgram.cs

using OpenGL;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Licenta_ver1
{
    /// <summary>
    /// Program abstraction.
    /// </summary>
    public class ShaderProgram : IDisposable
    {
        public ShaderProgram(string[] vertexSource, string[] fragmentSource)
        {
            // Create vertex and frament shaders
            // Note: they can be disposed after linking to program; resources are freed when deleting the program
            using (OpenGL_Object vObject = new OpenGL_Object(ShaderType.VertexShader, vertexSource))
            using (OpenGL_Object fObject = new OpenGL_Object(ShaderType.FragmentShader, fragmentSource))
            {
                // Create program
                ProgramName = Gl.CreateProgram();
                // Attach shaders
                Gl.AttachShader(ProgramName, vObject.ShaderName);
                Gl.AttachShader(ProgramName, fObject.ShaderName);
                // Link program
                Gl.LinkProgram(ProgramName);

                // Check linkage status
                int linked;

                Gl.GetProgram(ProgramName, ProgramProperty.LinkStatus, out linked);

                if (linked == 0)
                {
                    int infologLength;

                    StringBuilder infolog = new StringBuilder(1024);
                    Gl.GetProgramInfoLog(ProgramName, 1024, out infologLength, infolog);

                    throw new InvalidOperationException($"unable to link program: {infolog}");
                }
            }
        }

        Dictionary<string, int> UniformLocations = new();

        public int GetUniformLocation(string name)
        {
            if (UniformLocations.TryGetValue(name, out int location))
                return location;
            location = Gl.GetUniformLocation(ProgramName, name);
            if (location < 0)
                throw new InvalidOperationException($"No uniform |{name}|.");
            UniformLocations[name] = location;
            return location;
        }

        public readonly uint ProgramName;

        public void Dispose()
        {
            Gl.DeleteProgram(ProgramName);
        }
    }
}