How to save encrypted.ctb after errode?

[msspad]

When preparing encrypted.ctb for Phrozen Mini 8k:

1. import from sl1
2. erode with 8 iterations all bottom layers
3. Save to encrypted.ctb
4. error message below

• Is there any solution for Phrozen Mini 8k?
• Same issue when applying operations ElephantFootErode() or AddEmptyFirstLayer() with scripts, see below.
• Changing WaitBeforeCure works fine (except for first layer), other operations also work fine.

System.NotSupportedException:
Currently we don't allow file save/encode/recreation on purpose on this encrypted file format.
We are against not permitted user data encryption, locks, constrains, restrictions, monopolization and non-sense policies that prevents others from create and lead-forward solutions around technology.
Full supporting this file format would be step-back for 3D technology and the community overall. Still, we allow to read the file for review, recover data and detect problems to make you a bit more covered from mistakes.
Please make your shift from this products and help the 3D technology go forward and open!
at UVtools.Core.FileFormats.FileFormat.Encode(String fileFullPath, OperationProgress progress) in D:\Tiago\Dropbox\Programming\C#\UVtools\UVtools.Core\FileFormats\FileFormat.cs:line 2626
at UVtools.Core.FileFormats.FileFormat.SaveAs(String filePath, OperationProgress progress) in D:\Tiago\Dropbox\Programming\C#\UVtools\UVtools.Core\FileFormats\FileFormat.cs:line 3507
at UVtools.WPF.MainWindow.<>c__DisplayClass109_0.b__0() in D:\Tiago\Dropbox\Programming\C#\UVtools\UVtools.WPF\MainWindow.axaml.cs:line 2069

private void ElephantFootErode() {
    if (0 < NumErodeInput.Value) {
        // log.AppendLine($"NumErodeInput={NumErodeInput.Value}");
        OperationMorph morph = new(SlicerFile) {
            MorphOperation = OperationMorph.MorphOperations.Erode,
            Iterations = NumErodeInput.Value,
        };
        morph.SelectBottomLayers();

        Progress.Token.ThrowIfCancellationRequested(); // Abort operation, user requested cancellation
        morph.ROI = Operation.ROI; // Copy user selected ROI to my operation
        morph.MaskPoints = Operation.MaskPoints; // Copy user selected Masks to my operation
        if (morph.CanValidate()) {
            morph.Execute(Progress);
        }
    }
}


private void AddEmptyFirstLayer() {
    var firstLayer = SlicerFile.FirstLayer;
    if (firstLayer.NonZeroPixelCount > 1) { // First layer is not blank as it seems, lets create one
        firstLayer = firstLayer.Clone();
        using var mat = EmguExtensions.InitMat(SlicerFile.Resolution);
        var pixelPos = firstLayer.BoundingRectangle.Center();
        mat.SetByte(pixelPos.X, pixelPos.Y, 1); // Print a very fade pixel to ignore empty layer detection
        firstLayer.LayerMat = mat;
        firstLayer.ExposureTime = SlicerFile.SupportsGCode ? 0 : 0.1f;
        firstLayer.SetWaitTimeBeforeCureOrLightOffDelay(0);
        SlicerFile.SuppressRebuildPropertiesWork(() => { SlicerFile.LayerManager.Prepend(firstLayer); });
    }
}

[sn4k3]

The Save is locked ATM for encrypted ctb.
To by pass that you need to convert the file, via File - Convert - Encrypted CTB
You can call the Convert method into script if you wish

[msspad]

• I wasn't precise enough: Menu File -> Save is locked. However, I always use Ctrl+s what works fine.
• My SL1s are configured with FILEFORMAT_ENCRYPTED.CTB in PrusaSlicer Notes, so they convert automatically with the Settings->Automation->Auto convert (though there should be modal window asking if overwriting was ok if there is already a ctb file)
• My issue is that once converted to encrypted.ctb, e.g. erroded layers cannot be saved anymore (neither with File->Save, File->"Save as" or Ctrl+s)

[sn4k3]

Menu File -> Save is locked. However, I always use Ctrl+s what works fine.

Both are the same method, Ctrl+S will raise same message. However you are allowed to change parameters and quick save (Not full enconde)

Auto convert (though there should be modal window asking if overwriting was ok if there is already a ctb file)

Can be a improvement for a future patch.

My issue is that once converted to encrypted.ctb, e.g. erroded layers cannot be saved anymore (neither with File->Save, File->"Save as" or Ctrl+s)

Yes, as i told, you need to re-convert your encrypted ctb to encrypted ctb to overcome that, is the same as a full save, made in other way...

[msspad]

thanks, saving with a script works now. Code snippet is below in case somebody else is interested.

string ctbEncryptedExtension = "encrypted.ctb";
var newFilePath = Path.Combine(SlicerFile.FileDirectoryPath, SlicerFile.FilenameNoExt +"."+ctbEncryptedExtension);
var ctbEncryptedFileFormat = FileFormat.FindByExtensionOrFilePath(ctbEncryptedExtension);
SlicerFile.Convert(ctbEncryptedFileFormat, newFilePath);

[sn4k3]

Heres a more clean alternative, fail-safe:

if (SlicerFile.GetType() == typeof(CTBEncryptedFile))
{
    // If SlicerFile is already an encrypted ctb
    SlicerFile.Convert(typeof(CTBEncryptedFile), SlicerFile.FileFullPath);
}
else
{
    // If you convert from other file thats not ctb encrypted
    // You dont need .encrypted.ctb virtual ext because you strict passing the file type to the converter
    var newFilePath = Path.Combine(SlicerFile.FileDirectoryPath, $"{SlicerFile.FilenameNoExt}.ctb");
    SlicerFile.Convert(typeof(CTBEncryptedFile), newFilePath);
}