com.gameminers.mav.render.IconRenderer.java Source code

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Here is the source code for com.gameminers.mav.render.IconRenderer.java

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/*
 * This file is part of Mav.
 *
 * Mav is free software: you can redistribute it and/or modify it under the terms
 * of the GNU Lesser General Public License as published by the Free Software
 * Foundation, either version 3 of the License, or (at your option) any later
 * version.
 *
 * Mav 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License along
 * with Mav. If not, see <http://www.gnu.org/licenses/>.
 */
package com.gameminers.mav.render;

import java.nio.ByteBuffer;

import org.apache.commons.lang.ArrayUtils;
import org.lwjgl.BufferUtils;
import org.lwjgl.LWJGLException;
import org.lwjgl.opengl.Display;
import org.lwjgl.opengl.GL11;
import org.lwjgl.opengl.Pbuffer;
import org.lwjgl.opengl.PixelFormat;

import com.gameminers.mav.Mav;

public class IconRenderer extends Thread {
    public static final int SIZE = 64;
    private Pbuffer pbuffer;
    private volatile boolean run = true;
    private float[] previousRGB = null;

    public IconRenderer() {
        super("Icon render thread");
    }

    @Override
    public void run() {
        try {
            init();
        } catch (Exception e) {
            return;
        }
        try {
            final ByteBuffer icon = BufferUtils.createByteBuffer(SIZE * SIZE * 4);
            while (run) {
                // LWJGL makes a deep copy of our ByteBuffer, so skip frames we don't need to render
                if (!ArrayUtils.isEquals(RenderState.lagRGB, previousRGB)) {
                    previousRGB = RenderState.lagRGB.clone();
                    Rendering.beforeFrame(SIZE, SIZE);
                    GL11.glPushMatrix();
                    Mav.personality.renderIconBackground(SIZE);
                    GL11.glTranslatef(SIZE / 2f, SIZE / 2f, 0);
                    Mav.personality.renderIconForeground(SIZE);
                    GL11.glPopMatrix();
                    GL11.glReadBuffer(GL11.GL_FRONT);
                    GL11.glReadPixels(0, 0, SIZE, SIZE, GL11.GL_RGBA, GL11.GL_UNSIGNED_BYTE, icon);
                    Display.setIcon(new ByteBuffer[] { icon });
                }
                sleep(33L); // We don't care very much about accuracy, and using LWJGL's sync() method screws up the main context
            }
        } catch (InterruptedException e) {
        }
    }

    protected void init() throws LWJGLException {
        try {
            pbuffer = new Pbuffer(SIZE, SIZE, new PixelFormat(24, 0, 0, 0, 4), null);
        } catch (LWJGLException e) {
            try {
                pbuffer = new Pbuffer(SIZE, SIZE, new PixelFormat(24, 0, 0, 0, 0), null);
            } catch (LWJGLException ex) {
                ex.printStackTrace();
                System.err
                        .println("The current graphics driver is incapable of Pbuffers. The icon will be static.");
                throw ex;
            }
        }
        pbuffer.makeCurrent();
        Rendering.setUpGL();
    }

    public void finish() {
        run = false;
    }

}