AnimatedGIFWriteFile.java Source code

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Here is the source code for AnimatedGIFWriteFile.java

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/*******************************************************************************
 * Copyright (c) 2000, 2005 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
//package org.eclipse.swt.snippets;
/*
 * Write an animated GIF to a file.
 * 
 * For a list of all SWT example snippets see
 * http://www.eclipse.org/swt/snippets/
 */
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.ImageData;
import org.eclipse.swt.graphics.ImageLoader;
import org.eclipse.swt.graphics.PaletteData;
import org.eclipse.swt.graphics.RGB;
import org.eclipse.swt.widgets.Display;

public class AnimatedGIFWriteFile {
    static Display display;

    static Color white, red, green, blue;

    static PaletteData palette;

    static Font font;

    public static void main(String[] args) {
        display = new Display();
        RGB whiteRGB = new RGB(0xff, 0xff, 0xff);
        RGB redRGB = new RGB(0xff, 0, 0);
        RGB greenRGB = new RGB(0, 0xff, 0);
        RGB blueRGB = new RGB(0, 0, 0xff);
        palette = new PaletteData(new RGB[] { whiteRGB, // 0
                redRGB, // 1
                greenRGB, // 2
                blueRGB }); // 3
        white = new Color(display, whiteRGB);
        red = new Color(display, redRGB);
        green = new Color(display, greenRGB);
        blue = new Color(display, blueRGB);
        font = new Font(display, "Comic Sans MS", 24, SWT.BOLD);

        ImageData[] data = new ImageData[4];
        data[0] = newFrame("", white, false, 0, 0, 101, 55, SWT.DM_FILL_NONE, 40);
        data[1] = newFrame("S", red, true, 0, 0, 30, 55, SWT.DM_FILL_NONE, 40);
        data[2] = newFrame("W", green, true, 28, 0, 39, 55, SWT.DM_FILL_NONE, 40);
        data[3] = newFrame("T", blue, true, 69, 0, 32, 55, SWT.DM_FILL_BACKGROUND, 200);

        ImageLoader loader = new ImageLoader();
        loader.data = data;
        loader.backgroundPixel = 0;
        loader.logicalScreenHeight = data[0].height;
        loader.logicalScreenWidth = data[0].width;
        loader.repeatCount = 0; // run forever
        loader.save("swt.gif", SWT.IMAGE_GIF);

        white.dispose();
        red.dispose();
        green.dispose();
        blue.dispose();
        font.dispose();
        display.dispose();

    }

    private static ImageData newFrame(String letter, Color color, boolean transparent, int x, int y, int width,
            int height, int disposalMethod, int delayTime) {
        ImageData temp = new ImageData(width, height, 2, palette); // 4-color
                                                                   // palette has
                                                                   // depth 2
        Image image = new Image(display, temp);
        GC gc = new GC(image);
        gc.setBackground(white);
        gc.fillRectangle(0, 0, width, height);
        gc.setForeground(color);
        gc.setFont(font);
        gc.drawString(letter, 5, 5);
        gc.dispose();
        ImageData frame = image.getImageData();
        if (transparent)
            frame.transparentPixel = 0; // white
        image.dispose();
        frame.x = x;
        frame.y = y;
        frame.disposalMethod = disposalMethod;
        frame.delayTime = delayTime;
        return frame;
    }
}