com.voxelplugineering.voxelsniper.util.GLSLUtilities.java Source code

Introduction

Here is the source code for com.voxelplugineering.voxelsniper.util.GLSLUtilities.java

Source

/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2014 The Voxel Plugineering Team
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package com.voxelplugineering.voxelsniper.util;

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;

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

public class GLSLUtilities {
    public static int loadShader(String filename, int type) {
        StringBuilder shaderSource = new StringBuilder();
        int shaderID = 0;

        try {
            BufferedReader reader = new BufferedReader(new FileReader(filename));
            String line;
            while ((line = reader.readLine()) != null) {
                shaderSource.append(line).append("\n");
            }
            reader.close();
        } catch (IOException e) {
            System.err.println("Could not read file.");
            e.printStackTrace();
            System.exit(-1);
        }

        shaderID = GL20.glCreateShader(type);
        GL20.glShaderSource(shaderID, shaderSource);
        GL20.glCompileShader(shaderID);

        if (GL20.glGetShaderi(shaderID, GL20.GL_COMPILE_STATUS) == GL11.GL_FALSE) {
            System.err.println("Could not compile shader.");
            System.err.println(GL20.glGetShaderInfoLog(shaderID, 1024));
            System.exit(-1);
        }

        OpenGLUtilities.checkGLError("loadShader");

        return shaderID;
    }
}