/* * Pixel Dungeon * Copyright (C) 2012-2015 Oleg Dolya * * Shattered Pixel Dungeon * Copyright (C) 2014-2019 Evan Debenham * * 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; } }