akarnokd.opengl.experiment.FontExample.java Source code

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Here is the source code for akarnokd.opengl.experiment.FontExample.java

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/**
 * Copyright 2013 David Karnok
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
package akarnokd.opengl.experiment;

import java.awt.Font;
import java.io.InputStream;

import org.lwjgl.LWJGLException;
import org.lwjgl.opengl.Display;
import org.lwjgl.opengl.DisplayMode;
import org.lwjgl.opengl.GL11;

import org.newdawn.slick.Color;
import org.newdawn.slick.TrueTypeFont;
import org.newdawn.slick.util.ResourceLoader;

public class FontExample {

    /** The fonts to draw to the screen */
    private TrueTypeFont font;
    private TrueTypeFont font2;

    /** Boolean flag on whether AntiAliasing is enabled or not */
    private boolean antiAlias = true;

    /**
     * Start the test 
     */
    public void start() {
        initGL(800, 600);
        init();

        while (true) {
            GL11.glClear(GL11.GL_COLOR_BUFFER_BIT);
            render();

            Display.update();
            Display.sync(100);

            if (Display.isCloseRequested()) {
                Display.destroy();
                System.exit(0);
            }
        }
    }

    /**
     * Initialise the GL display
     * 
     * @param width The width of the display
     * @param height The height of the display
     */
    private void initGL(int width, int height) {
        try {
            Display.setDisplayMode(new DisplayMode(width, height));
            Display.create();
            Display.setVSyncEnabled(true);
        } catch (LWJGLException e) {
            e.printStackTrace();
            System.exit(0);
        }

        GL11.glEnable(GL11.GL_TEXTURE_2D);
        GL11.glShadeModel(GL11.GL_SMOOTH);
        GL11.glDisable(GL11.GL_DEPTH_TEST);
        GL11.glDisable(GL11.GL_LIGHTING);

        GL11.glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
        GL11.glClearDepth(1);

        GL11.glEnable(GL11.GL_BLEND);
        GL11.glBlendFunc(GL11.GL_SRC_ALPHA, GL11.GL_ONE_MINUS_SRC_ALPHA);

        GL11.glViewport(0, 0, width, height);
        GL11.glMatrixMode(GL11.GL_MODELVIEW);

        GL11.glMatrixMode(GL11.GL_PROJECTION);
        GL11.glLoadIdentity();
        GL11.glOrtho(0, width, height, 0, 1, -1);
        GL11.glMatrixMode(GL11.GL_MODELVIEW);
    }

    /**
     * Initialise resources
     */
    public void init() {
        // load a default java font
        Font awtFont = new Font("Consolas", Font.BOLD, 24);
        font = new TrueTypeFont(awtFont, antiAlias);

        // load font from file
        try {
            InputStream inputStream = ResourceLoader.getResourceAsStream("myfont.ttf");

            Font awtFont2 = Font.createFont(Font.TRUETYPE_FONT, inputStream);
            awtFont2 = awtFont2.deriveFont(24f); // set font size
            font2 = new TrueTypeFont(awtFont2, antiAlias);

        } catch (Exception e) {
            e.printStackTrace();
            font2 = font;
        }
    }

    /**
     * Game loop render
     */
    public void render() {
        Color.white.bind();

        font.drawString(100, 50, "THE LIGHTWEIGHT JAVA GAMES LIBRARY", Color.yellow);
        font2.drawString(100, 100, "NICE LOOKING FONTS!", Color.green);
    }

    /**
     * Main method
     */
    public static void main(String[] argv) {
        FontExample fontExample = new FontExample();
        fontExample.start();
    }
}