LodePaint: Painting Program

LodePaint is an open source painting program similar to (Kolour)Paint but with more advanced features, more filters, soft brushes, alpha channel support, some HDR image support, etc...
The program is aimed mostly at pixel artists, icons, texture editing, "programmer's art", etc...
It can be downloaded here: https://sourceforge.net/projects/lodepaint/files/
Just unzip & run. It requires SDL, and hardware accelerated OpenGL to run.
Please try it out!
Last edited by aardwolf (2010-03-06 15:20:01)

If you try compiling it for 64-bit, it'd be interesting to know if it worked.
It did not. Using this PKGBUILD
# Maintainer: Stefan Husmann <[email protected]>
pkgname=lodepaint-svn
pkgver=7
pkgrel=1
pkgdesc="Painting program with full SDL+OpenGL GUI."
url="http://sourceforge.net/projects/lodepaint/"
arch=('i686' 'x86_64')
license=('GPL3')
depends=('sdl')
source=()
md5sums=()
_svntrunk=https://lodepaint.svn.sourceforge.net/svnroot/lodepaint
_svnmod=lodepaint
build() {
cd "$srcdir"
LANG=C
if [ -d $_svnmod/.svn ]; then
(cd $_svnmod && svn up -r $pkgver)
else
svn co $_svntrunk --config-dir ./ -r $pkgver $_svnmod
fi
msg "SVN checkout done or server timeout"
msg "Starting make..."
rm -rf "$srcdir/$_svnmod-build"
cp -r "$srcdir/$_svnmod" "$srcdir/$_svnmod-build"
cd "$srcdir/$_svnmod-build/trunk"
# BUILD
g++ src/*.cpp src/lpi/*.cpp -o lodepaint -lSDL -lGL -W -Wall \
-Wextra -pedantic -ansi -O2
install -Dm755 lodepaint $pkgdir/usr/bin/lodepaint
I get
==> Determining latest svn revision...
-> Version found: 7
==> Making package: lodepaint-svn 7-1 x86_64 (So 7. Mär 13:25:31 CET 2010)
==> Checking Runtime Dependencies...
==> Checking Buildtime Dependencies...
==> Retrieving Sources...
==> Extracting Sources...
==> Removing existing pkg/ directory...
==> Entering fakeroot environment...
==> Starting build()...
At revision 7.
==> SVN checkout done or server timeout
==> Starting make...
src/paint_filter_plugin.cpp: In constructor 'FilterPlugin::FilterPlugin(const std::string&, GlobalToolSettings&, const lpi::gui::IGUIDrawer&)':
src/paint_filter_plugin.cpp:52: warning: dereferencing type-punned pointer will break strict-aliasing rules
src/paint_filter_plugin.cpp:69: warning: dereferencing type-punned pointer will break strict-aliasing rules
src/paint_filter_plugin.cpp:82: warning: dereferencing type-punned pointer will break strict-aliasing rules
src/paint_filter_plugin.cpp:83: warning: dereferencing type-punned pointer will break strict-aliasing rules
src/paint_filter_plugin.cpp:85: warning: dereferencing type-punned pointer will break strict-aliasing rules
src/paint_filter_plugin.cpp:86: warning: dereferencing type-punned pointer will break strict-aliasing rules
src/paint_filter_plugin.cpp:87: warning: dereferencing type-punned pointer will break strict-aliasing rules
src/paint_filter_plugin.cpp:88: warning: dereferencing type-punned pointer will break strict-aliasing rules
src/paint_filter_plugin.cpp:96: warning: dereferencing type-punned pointer will break strict-aliasing rules
src/paint_filter_plugin.cpp:97: warning: dereferencing type-punned pointer will break strict-aliasing rules
src/paint_filter_plugin.cpp:98: warning: dereferencing type-punned pointer will break strict-aliasing rules
src/paint_filter_plugin.cpp:99: warning: dereferencing type-punned pointer will break strict-aliasing rules
src/paint_filter_plugin.cpp:100: warning: dereferencing type-punned pointer will break strict-aliasing rules
src/paint_filter_plugin.cpp:101: warning: dereferencing type-punned pointer will break strict-aliasing rules
src/paint_filter_plugin.cpp:102: warning: dereferencing type-punned pointer will break strict-aliasing rules
src/paint_filter_plugin.cpp:103: warning: dereferencing type-punned pointer will break strict-aliasing rules
src/paint_filter_plugin.cpp:104: warning: dereferencing type-punned pointer will break strict-aliasing rules
src/paint_filter_plugin.cpp:105: warning: dereferencing type-punned pointer will break strict-aliasing rules
src/paint_filter_plugin.cpp:106: warning: dereferencing type-punned pointer will break strict-aliasing rules
src/paint_filter_plugin.cpp:107: warning: dereferencing type-punned pointer will break strict-aliasing rules
src/paint_filter_plugin.cpp:108: warning: dereferencing type-punned pointer will break strict-aliasing rules
src/paint_filter_plugin.cpp: In constructor 'FilterPlugin::FilterPlugin(const std::string&, GlobalToolSettings&, const lpi::gui::IGUIDrawer&)':
src/paint_filter_plugin.cpp:52: warning: dereferencing pointer 'p_getLodePaintPluginType.174' does break strict-aliasing rules
src/paint_filter_plugin.cpp:52: note: initialized from here
src/paint_filter_plugin.cpp: In constructor 'FilterPlugin::FilterPlugin(const std::string&, GlobalToolSettings&, const lpi::gui::IGUIDrawer&)':
src/paint_filter_plugin.cpp:52: warning: dereferencing pointer 'p_getLodePaintPluginType.174' does break strict-aliasing rules
src/paint_filter_plugin.cpp:52: note: initialized from here
src/paint_imageformats.cpp: In constructor 'ImageFormatPlugin::ImageFormatPlugin(const std::string&)':
src/paint_imageformats.cpp:403: warning: dereferencing type-punned pointer will break strict-aliasing rules
src/paint_imageformats.cpp:422: warning: dereferencing type-punned pointer will break strict-aliasing rules
src/paint_imageformats.cpp:435: warning: dereferencing type-punned pointer will break strict-aliasing rules
src/paint_imageformats.cpp:442: warning: dereferencing type-punned pointer will break strict-aliasing rules
src/paint_imageformats.cpp:449: warning: dereferencing type-punned pointer will break strict-aliasing rules
src/paint_imageformats.cpp:456: warning: dereferencing type-punned pointer will break strict-aliasing rules
src/paint_imageformats.cpp:463: warning: dereferencing type-punned pointer will break strict-aliasing rules
src/paint_imageformats.cpp:464: warning: dereferencing type-punned pointer will break strict-aliasing rules
src/paint_imageformats.cpp:465: warning: dereferencing type-punned pointer will break strict-aliasing rules
src/paint_imageformats.cpp:466: warning: dereferencing type-punned pointer will break strict-aliasing rules
src/paint_imageformats.cpp:468: warning: dereferencing type-punned pointer will break strict-aliasing rules
src/paint_imageformats.cpp: In constructor 'ImageFormatPlugin::ImageFormatPlugin(const std::string&)':
src/paint_imageformats.cpp:403: warning: dereferencing pointer 'p_getLodePaintPluginType.203' does break strict-aliasing rules
src/paint_imageformats.cpp:403: note: initialized from here
src/paint_imageformats.cpp: In constructor 'ImageFormatPlugin::ImageFormatPlugin(const std::string&)':
src/paint_imageformats.cpp:403: warning: dereferencing pointer 'p_getLodePaintPluginType.203' does break strict-aliasing rules
src/paint_imageformats.cpp:403: note: initialized from here
src/lpi/lpi_imageformats.cpp: In function 'bool lpi::decodeImageFile(std::string&, std::vector<unsigned char, std::allocator<unsigned char> >&, int&, int&, const unsigned char*, size_t, lpi::ImageFormat)':
src/lpi/lpi_imageformats.cpp:795: error: no matching function for call to 'CBitmap::GetBits(unsigned char*, size_t&, int)'
src/lpi/lpi_imageformats.cpp:593: note: candidates are: bool CBitmap::GetBits(void*, unsigned int&)
src/lpi/lpi_imageformats.cpp:607: note: void* CBitmap::GetBits()
src/lpi/lpi_imageformats.cpp:614: note: bool CBitmap::GetBits(void*, unsigned int&, unsigned int)
src/lpi/stb_image.cpp: In function 'stbi_uc* stbi_tga_load_from_memory(const stbi_uc*, int, int*, int*, int*, int)':
src/lpi/stb_image.cpp:2866: warning: 'trans_data$3' may be used uninitialized in this function
src/lpi/stb_image.cpp:2866: note: 'trans_data$3' was declared here
src/lpi/stb_image.cpp:2866: warning: 'trans_data$2' may be used uninitialized in this function
src/lpi/stb_image.cpp:2866: note: 'trans_data$2' was declared here
src/lpi/stb_image.cpp:2866: warning: 'trans_data$1' may be used uninitialized in this function
src/lpi/stb_image.cpp:2866: note: 'trans_data$1' was declared here
src/lpi/stb_image.cpp:2866: warning: 'trans_data$0' may be used uninitialized in this function
src/lpi/stb_image.cpp:2866: note: 'trans_data$0' was declared here
install: cannot stat `lodepaint': No such file or directory
==> ERROR: Build Failed.
Aborting...
Process makepkg exited abnormally with code 2
the relevant error seems to be in
src/lpi/lpi_imageformats.cpp:795:error: no matching function for call to 'CBitmap::GetBits(unsigned char*, size_t&, int)'
src/lpi/lpi_imageformats.cpp:593: note: candidates are: bool CBitmap::GetBits(void*, unsigned int&)
src/lpi/lpi_imageformats.cpp:607: note: void* CBitmap::GetBits()
src/lpi/lpi_imageformats.cpp:614: note: bool CBitmap::GetBits(void*, unsigned int&, unsigned int)
Last edited by Stefan Husmann (2010-03-07 12:39:07)

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Currently the code is like this:
public void mouseDragged(MouseEvent me)
            a = new Point();
            a.setLocation(me.getX(),me.getY());
            pt.add(a);
            repaint();
        }Is there a more effcicient way of doing this, if I drag my mouse accross the sccreen there are noticeable gaps between the points.

Don't draw a point at each spot along the drag path, draw a line between every two adjacent points. The mouse won't be at every pixel along the path, you can easily move it fast enough that it skips points, so drawing lines between adjacent points compensates for that.

Small paint program

hi guys
I'm having some trouble making a small paint program with swing. It needs the following functions:
- choose a shape from a combobox(only line, rectangle or circle).
- set the filled checkbox to on or off
- choose a color with the JColorChooser when you click on the colorLabel
Then you can start drawing the shape you selected on the JPanel.
Could someone help me out ? I would really appreciate that :-)
Greetz

noah.w's PaintLike2 program might get you what you want
http://forum.java.sun.com/thread.jspa?forumID=256&threadID=476969
there is a PaintLike3 (also from noah.w) in the forums somewhere,
but I couldn't find it

Paint program

please anyone help me in this:-
i want when i press button(line)
appear sign like (+) and draw line in any direction
please how can i do this ..
please anyone help me.
thanks in advance

first :- thanks my friend for your answer.
but i can't do anything in paint program .. i'm very annoying
this my code :
i hope anyone show to me how can draw line in texarea in my code .
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.ObjectInputStream;
import java.util.Vector;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
public class Paint extends JFrame {
    private JMenuBar bar;
    private JMenu fileMenue;
    private JMenuItem openItem, saveItem, aboutItem, exitItem;
    private ObjectInputStream ois;
    private Vector vFile;
   // private CanvasPanel canvaspanel;
    public Paint() {
        super("Paint program");
        bar = new JMenuBar();
        fileMenue = new JMenu("File");
        openItem = new JMenuItem("open");
        fileMenue.add(openItem);
   //     openItem.addActionListener(new HandlerListener());
        saveItem = new JMenuItem("save");
        fileMenue.add(saveItem);
        aboutItem = new JMenuItem("About");
        fileMenue.add(aboutItem);
        setJMenuBar(bar);
        bar.add(fileMenue);
        add(new Component());
    public static void main(String[] args) {
        Paint paint = new Paint();
        paint.setVisible(true);
        paint.setLocationRelativeTo(null);
        paint.pack();
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JPanel;
import javax.swing.JTextArea;
import javax.swing.JToolBar;
import javax.swing.border.TitledBorder;
class Component extends JPanel {
    private ButtonTest buttontest;
    private JToolBar toolBar;
    private JButton lineButton,RectButton,ovalButton,polyButton,colorButton,rubberButton;
    private JTextArea area;
    private JPanel titlePanel;
    public Component() {
        setLayout(new BorderLayout());
        toolBar=new JToolBar();
        lineButton=new JButton("line");
        lineButton.setToolTipText("Drawing line");
        lineButton.addActionListener(this);
         RectButton=new JButton("Rectangle");
        RectButton.setToolTipText("Drawing Rectangle");
        ovalButton=new JButton("Oval");
        ovalButton.setToolTipText("Drawing Oval");
        polyButton=new JButton("polygan");
        polyButton.setToolTipText("Drawing polygan");
        toolBar.add(lineButton,BorderLayout.PAGE_START);
        toolBar.add(RectButton);
        toolBar.add(ovalButton);
        toolBar.add(polyButton);
        add(toolBar,BorderLayout.NORTH);
        area=new JTextArea(20,30);
        area.setBackground(Color.LIGHT_GRAY);
        add(area);
       // setLayout(new GridLayout(0,2));
         titlePanel=new JPanel();
         TitledBorder titleColor;
         titleColor=BorderFactory.createTitledBorder("Component list");
         titlePanel.setBorder(titleColor);
         colorButton=new JButton("   Colors   ");
         rubberButton=new JButton("Rubber");
         titlePanel.setLayout(new GridLayout(0,1));
         titlePanel.add(colorButton,BorderLayout.NORTH);
         titlePanel.add(rubberButton,BorderLayout.SOUTH);
         add(titlePanel,BorderLayout.WEST);
    public void actionPerformed(ActionEvent e){
        if(e.getSource()==lineButton)
            ButtonTest
public Dimension getPrefereSize(){
        return new Dimension(600,500);
import java.awt.Graphics;
import java.awt.Point;
import org.w3c.dom.events.MouseEvent;
class ButtonTest implements MouseListener, MouseMotionListener {
    String[] Shape={"LINE","Oval","Rectangle","polygan"};
   Point p;
    int x1,y1,x2,y2,width,height;
    public ButtonTest()
    public void DrawingLine(Graphics g){
        g.drawLine(x1, y1, x2, y1);
        mousePressed(MouseEvent e);
        mouseDragged(MouseEvent e);
    public void mousePressed(MouseEvent e) {
      p=e.getPoint();
    public void mouseDragged(MouseEvent e){
        rePaint();
        getGraphics().drawLine(p.x1, p.y1, e.getX(), e.getY());//draw line from start point to current mouse position
    private Object getGraphics() {
        throw new UnsupportedOperationException("Not yet implemented");
    private void rePaint() {
        throw new UnsupportedOperationException("Not yet implemented");
i know there is a lot of error in my code but i can't to correct it so please any one help me
to correct my error and to draw only line in any direction in textarea
thanks my friends

Paint Program/Coloring book

Hi =) I'm pretty new to Java, just started taking java programming this quarter, and yeah, it's pretty confusing. ^^ But it started to make more sense when we learned about GUI and applets and stuff, since I'm more of an html person.
Anyways, what I have done is a simple paint program. I have the canvas, and buttons with colors to choose from, and the clear button. I want to see if I can do a coloring book/page program. So if anyone can help me out of give me some advice on how to start. What I want to be able to do is have certain objects or a picture already on the canvas, and people can simply select the colors, and click somewhere on the picture to color it.
I'd really appreciate the help. =) thanks!

Normally your repsonses are better, faster, and happier the more specific you are. This fairly vauge, I would suggest starting on your project and ask a specific question when you get stuck.

Paint Program Help

I'm trying to develop a simple paint program and the one feature that I just can't seem to figure out is how to add a text box to the image.
I want the user to be able to click a button, click on the spot on the image that they want text, and then to type that text in.
Thanks for the help!

You can use JOptionPane.showInputDialog() upon mouseClicked and thendrawString() after user inputs text

LodePaint: Painting Program

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