net.betabears.the2dlibrary.graphics.shader.Shader.java Source code

Introduction

Here is the source code for net.betabears.the2dlibrary.graphics.shader.Shader.java

Source

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package net.betabears.the2dlibrary.graphics.shader;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.lwjgl.opengl.GL11;
import org.lwjgl.opengl.GL20;

class Shader {

    private int type;
    private File file;
    private int id;
    private String text;
    private Logger LOGGER = Logger.getLogger(Shader.class.getName());

    private Shader() {
    }

    public Shader(int type, String filepath) {
        this.type = type;
        file = new File(filepath);
    }

    public Shader(int type, File f) {
        this.type = type;
        file = f;
    }

    public void loadShader() {
        StringBuilder src = new StringBuilder();
        FileInputStream fis;
        try {
            fis = new FileInputStream(file);
            try (BufferedReader br = new BufferedReader(new InputStreamReader(fis, "UTF-8"))) {
                String line;
                while ((line = br.readLine()) != null) {
                    src.append(line).append("\n");
                }
                br.close();
            }
            fis.close();
        } catch (FileNotFoundException | UnsupportedEncodingException ex) {
            Logger.getLogger(Shader.class.getName()).log(Level.SEVERE, null, ex);
        } catch (IOException ex) {
            Logger.getLogger(Shader.class.getName()).log(Level.SEVERE, null, ex);
        }
        text = src.toString();
    }

    public int getType() {
        return type;
    }

    public File getFile() {
        return file;
    }

    public String getText() {
        return text;
    }

    public void createShader() {
        id = GL20.glCreateShader(type);
        GL20.glShaderSource(id, text);
        GL20.glCompileShader(id);

        int i;
        while ((i = GL11.glGetError()) != 0) {
            LOGGER.log(Level.WARNING, "Error happened during creation of ShaderProgram. GL error code: {0}", i);
        }
    }

    public int getID() {
        return id;
    }
}