com.watabou.glwrap.Program.java Source code

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Here is the source code for com.watabou.glwrap.Program.java

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/*
 * Copyright (C) 2012-2014  Oleg Dolya
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>
 */

package com.watabou.glwrap;

import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.graphics.GL20;
import com.badlogic.gdx.utils.BufferUtils;

import java.nio.IntBuffer;

public class Program {

    private int handle;

    public Program() {
        handle = Gdx.gl.glCreateProgram();
    }

    public int handle() {
        return handle;
    }

    public void attach(Shader shader) {
        Gdx.gl.glAttachShader(handle, shader.handle());
    }

    public void link() {
        Gdx.gl.glLinkProgram(handle);

        IntBuffer status = BufferUtils.newIntBuffer(1);
        Gdx.gl.glGetProgramiv(handle, GL20.GL_LINK_STATUS, status);
        if (status.get() == GL20.GL_FALSE) {
            throw new Error(Gdx.gl.glGetProgramInfoLog(handle));
        }
    }

    public Attribute attribute(String name) {
        return new Attribute(Gdx.gl.glGetAttribLocation(handle, name));
    }

    public Uniform uniform(String name) {
        return new Uniform(Gdx.gl.glGetUniformLocation(handle, name));
    }

    public void use() {
        Gdx.gl.glUseProgram(handle);
    }

    public void delete() {
        Gdx.gl.glDeleteProgram(handle);
    }

    public static Program create(Shader... shaders) {
        Program program = new Program();
        for (int i = 0; i < shaders.length; i++) {
            program.attach(shaders[i]);
        }
        program.link();
        return program;
    }
}