com.auroraengine.opengl.GLTexture.java Source code

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Here is the source code for com.auroraengine.opengl.GLTexture.java

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/*
 * Copyright (C) 2017 LittleRover
 *
 * 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.auroraengine.opengl;

import com.auroraengine.client.ClientException;
import com.auroraengine.debug.AuroraLogs;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.util.logging.Logger;
import javax.imageio.ImageIO;
import org.lwjgl.opengl.GL11;
import org.lwjgl.opengl.GL12;

// TODO extend GLSharedObject and implement.
/**
 *
 * @author LittleRover
 */
public class GLTexture implements GLObject {
    private static final Logger LOG = AuroraLogs.getLogger(GLTexture.class.getName());

    public GLTexture(int w, int h) {
        this.img = new BufferedImage(w, h, BufferedImage.TYPE_4BYTE_ABGR);
    }

    public GLTexture(BufferedImage img) {
        this.img = img;
    }

    public GLTexture(File file) {
        this.file = file;
    }

    private File file;
    private boolean image_modified = true;
    private BufferedImage img;
    private int mag_filter = GL11.GL_LINEAR;
    private int min_filter = GL11.GL_LINEAR;
    private boolean save_on_unload = false;
    private int tex_ref = 0;
    private int wrap_s = GL11.GL_REPEAT;
    private int wrap_t = GL11.GL_REPEAT;

    @Override
    public void create() throws GLException {
        if (tex_ref == 0) {
            tex_ref = GL11.glGenTextures();
            update();
        }
    }

    @Override
    public void destroy() {
        if (tex_ref != 0) {
            GL11.glDeleteTextures(tex_ref);
            tex_ref = 0;
        }
    }

    @Override
    public boolean isCreated() {
        return tex_ref > 0;
    }

    @Override
    public boolean isLoaded() {
        return img == null;
    }

    @Override
    public void load() throws ClientException {
        if (file != null) {
            try {
                img = ImageIO.read(file);
            } catch (IOException ex) {
                throw new ClientException(ex);
            }
        }
    }

    @Override
    public void unload() throws ClientException {
        if (file != null) {
            if (save_on_unload) {
                try {
                    ImageIO.write(img, "png", file);
                } catch (IOException ex) {
                    throw new ClientException(ex);
                }
            }
            img = null;
        }
    }

    @Override
    public void update() throws GLException {
        if (tex_ref != 0) {
            GL11.glBindTexture(GL11.GL_TEXTURE_2D, tex_ref);

            GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_MIN_FILTER, min_filter);
            GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_MAG_FILTER, mag_filter);

            GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_WRAP_S, wrap_s);
            GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_WRAP_T, wrap_t);

            if (image_modified) {
                ByteBuffer bb = ByteBuffer.allocateDirect(4 * img.getWidth() * img.getHeight());
                GL11.glTexImage2D(GL11.GL_TEXTURE_2D, 0, GL12.GL_BGRA, img.getWidth(), img.getHeight(), 0,
                        GL12.GL_BGRA, GL11.GL_UNSIGNED_BYTE, bb);
                // TODO: Redirect images to buffers
            }
        }
    }
}