ShaderProgram.java

package com.main;

import static org.lwjgl.opengl.GL11.*;
import static org.lwjgl.opengl.GL20.*;

public class ShaderProgram {

    private int programID;
    private int vertexShaderID;
    private int fragmentShaderID;

    public ShaderProgram() {
        programID = glCreateProgram();
    }

    public void attachVertexShader(String name)
    {
        // Load the source
        String vertexShaderSource = FileUtil.readFromFile(name);

        // Create the shader and set the source
        vertexShaderID = glCreateShader(GL_VERTEX_SHADER);
        glShaderSource(vertexShaderID, vertexShaderSource);

        // Compile the shader
        glCompileShader(vertexShaderID);

        // Check for errors
        if (glGetShaderi(vertexShaderID, GL_COMPILE_STATUS) == GL_FALSE)
            throw new RuntimeException("Error creating vertex shader\n"
                                       + glGetShaderInfoLog(vertexShaderID, glGetShaderi(vertexShaderID, GL_INFO_LOG_LENGTH)));

        // Attach the shader
        glAttachShader(programID, vertexShaderID);
    }

    public void attachFragmentShader(String name)
    {
        // Load the source
        String fragmentShaderSource = FileUtil.readFromFile(name);

        // Create the shader and set the source
        fragmentShaderID = glCreateShader(GL_FRAGMENT_SHADER);
        glShaderSource(fragmentShaderID, fragmentShaderSource);

        // Compile the shader
        glCompileShader(fragmentShaderID);

        // Check for errors
        if (glGetShaderi(fragmentShaderID, GL_COMPILE_STATUS) == GL_FALSE)
            throw new RuntimeException("Error creating vertex shader\n"
                                       + glGetShaderInfoLog(fragmentShaderID, glGetShaderi(fragmentShaderID, GL_INFO_LOG_LENGTH)));

        // Attach the shader
        glAttachShader(programID, fragmentShaderID);
    }

    public void link()
    {
        // Link this program
        glLinkProgram(programID);

        // Check for linking errors
        if (glGetProgrami(programID, GL_LINK_STATUS) == GL_FALSE)
            throw new RuntimeException("Unable to link shader program:");
    }

    public void bind()
    {
        glUseProgram(programID);
    }

    public void unbind()
    {
        glUseProgram(0);
    }

     public void dispose()
        {
            // Unbind the program
            unbind();

            // Detach the shaders
            glDetachShader(programID, vertexShaderID);
            glDetachShader(programID, fragmentShaderID);

            // Delete the shaders
            glDeleteShader(vertexShaderID);
            glDeleteShader(fragmentShaderID);

            // Delete the program
            glDeleteProgram(programID);
        }

     public int getID()
        {
            return programID;
        }
}