fr.theshark34.sharkengine.ui.components.Image.java Source code

Introduction

Here is the source code for fr.theshark34.sharkengine.ui.components.Image.java

Source

/*
 * Copyright 2015 TheShark34
 * 
 * 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 fr.theshark34.sharkengine.ui.components;

import java.io.IOException;
import java.io.InputStream;

import org.lwjgl.opengl.GL11;
import org.newdawn.slick.opengl.Texture;
import org.newdawn.slick.opengl.TextureLoader;

/**
 * A textured quad
 * 
 * @author TheShark34
 * @version ALPHA 0.0.1
 */
public class Image extends Component {

    /**
     * The texture
     */
    private Texture texture;

    /**
     * Init the image
     * 
     * @param is
     *            An input stream of a png file HEIGHT AND WIDTH IT NEED TO BE
     *            2/4/8/16/32/64/128/512/1024/etc... but you can scale it by
     *            setting a width and a height with the second constructor
     * @throws IOException
     *             If it fails to load the image
     */
    public Image(int x, int y, InputStream is) throws IOException {
        // Check if the input stream isn't null
        if (is == null)
            throw new IllegalArgumentException("is == null !");

        // Setting things
        this.texture = TextureLoader.getTexture("PNG", is);
        this.x = x;
        this.y = y;
        this.width = texture.getTextureWidth();
        this.height = texture.getTextureHeight();
    }

    /**
     * Init the image width predefined width and height
     * 
     * @param is
     *            An input stream of a png file HEIGHT AND WIDTH IT NEED TO BE
     *            2/4/8/16/32/64/128/512/1024/etc... but you can scale it by
     *            setting a width and a height
     * @throws IOException
     *             If it fails to load the image
     */
    public Image(int x, int y, int width, int height, InputStream is) throws IOException {
        // Check if the input stream isn't null
        if (is == null)
            throw new IllegalArgumentException("is == null !");

        // Setting things
        this.texture = TextureLoader.getTexture("PNG", is);
        this.x = x;
        this.y = y;
        this.width = width;
        this.height = height;
    }

    /**
     * Draw it
     */
    @Override
    public void draw() {
        // Without this, image can render strangely
        GL11.glColor3f(1.0F, 1.0F, 1.0F);

        // Enabling blend and texture
        GL11.glEnable(GL11.GL_BLEND);
        GL11.glBlendFunc(GL11.GL_SRC_ALPHA, GL11.GL_ONE_MINUS_SRC_ALPHA);
        GL11.glEnable(GL11.GL_TEXTURE_2D);
        GL11.glBindTexture(GL11.GL_TEXTURE_2D, texture.getTextureID());

        // Drawing the image
        GL11.glBegin(GL11.GL_QUADS);
        {
            GL11.glTexCoord2f(0.0f, 0.0f);
            GL11.glVertex2f(x, y);
            GL11.glTexCoord2f(1.0f, 0.0f);
            GL11.glVertex2f(x + width, y);
            GL11.glTexCoord2f(1.0f, 1.0f);
            GL11.glVertex2f(x + width, y + height);
            GL11.glTexCoord2f(0.0f, 1.0f);
            GL11.glVertex2f(x, y + height);
        }
        GL11.glEnd();

        // Disabling blend and texture
        GL11.glDisable(GL11.GL_BLEND);
        GL11.glDisable(GL11.GL_TEXTURE_2D);
        GL11.glBindTexture(GL11.GL_TEXTURE_2D, 0);
    }

    /**
     * Return the texture field
     * 
     * @return The texture
     */
    public Texture getTexture() {
        return texture;
    }

    /**
     * Set a new texture
     * 
     * @param texture
     *            The new texture to set
     */
    public void setTexture(Texture texture) {
        this.texture = texture;
    }

}