Why not add a postprocessing step and run OptiPNG after generating png. The easiest thing would probably be just running optipng after generating using QProcess.

I've already added the pngquant optimizer. I will send a pr it as soon as the optimizer pr is merged. The only thing i don't know yet with pngquant is, what the png opt level slider is for. It should use the slowest generation, so that the the output image quality istn't that much sacrified.Maybe optslider changes the compression of the saved image.

Crashes every time with exit code -1 or -1073741571. Example project file with 100% repro attached. The project was created in GUI and when used in GUI, it works fine.

In folder abc_0 there is file 00.png. But key has value abc_0/00.

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
 <dict>
  <key>frames</key>
  <dict>
   <key>abc_0/00</key>
   <dict>
    <key>aliases</key>
    <array/>
    <key>spriteOffset</key>
    <string>{-1,1}</string>
    <key>spriteSize</key>
    <string>{71,73}</string>
    <key>spriteSourceSize</key>
    <string>{75,98}</string>
    <key>textureRect</key>
    <string>{{85,0},{71,73}}</string>
    <key>textureRotated</key>
    <false/>
   </dict>

I get the following error message:

Could not find qmake spec 'default'.
Error while parsing file /home/user/projects/sprite-sheet-packer/sprite-sheet-packer.pro. Giving up.

Which Qt Creator Version do you user?

Hello,

I hope this is useful. It automatically creates packages for macOS & Linux (DMG for macOS, AppImage for Linux) on every commit to master using Github Actions (the tab here on top). A nice badge can be added on the readme for people to be able to download the builds or something similar, but I'll leave the niceties for somebody else if you accept this PR :).

Also, a Windows build is missing. Should be a matter of mostly copying what the macOS build is doing. And the commits are separate (more or less) in case you want to add only Linux or only macOS support for any reason :).

Finally, this is not perfect and can be improved a lot, but I've already spent too much time on it already :).

Hi, Saving a project on linux (tested in Ubuntu 19.10 with Qt 5.13) crashes. That's because the file dialog does not automatically adds the extension. I had the same problem for my own tool. I made a possible workarround here:

void MainWindow::on_actionSaveAs_triggered() {
    QSettings settings;
    QString dir;
    if (!_currentProjectFileName.isEmpty()) {
        dir = _currentProjectFileName;
    } else {
        dir = settings.value("spritePackerFileName", QDir::currentPath()).toString();
    }
    QString fileName = QFileDialog::getSaveFileName(this, tr("Save sprite packer project file."),
                                                    dir,
                                                    tr("Sprite sheet packer (*.ssp)"));
    if (!fileName.isEmpty()) {
        if (!fileName.endsWith(".ssp")) {
            fileName.append(".ssp");
        }
        settings.setValue("spritePackerFileName", fileName);
        saveSpritePackerProject(fileName);
    }
}

Just added a verification that if the correct suffix is not added to the filename when saving, add it by default. I'll make a PR if that way suits your guidelines!

Command line usage: input path does not support spaces, whereas output path with spaces work.

this does not work: SpriteSheetPacker.exe "C:\test\input with spaces\siteicons" "C:\test\output with spaces works"

this does work: SpriteSheetPacker.exe "C:\test\inputwithoutspacesworks\siteicons" "C:\test\output with spaces works"

For supporting the LibGDX format, it is necessary to be able to export the pixel format and texture filter options.

Currently you can select the pixel format but for the texture filter there is no UI control.

Hi, I suggest project file should be a zip file (with extension changed to .ssp) that includes the images used inside, as other tools do. This way we could move project arround, share it, even version it for group projects.

Hi! I'm trying to compile for linux in debut mode, and i get this error:

error while loading shared libraries: libPVRTexLib.so: cannot open shared object file: No such file or directory

I can confirm libPVRTexLib.so is present in 3rdparty folder.

In release mode, i cannot even compile.. i get that error during compilation.

Is there any instructions on how to build? Thanks!

I'm using Qt 5.13 64bits btw.