The addition of the erase blend mode from #1117 resulted in loading pxo files from v1.0-v1.0.3 to have incorrect blend modes in their layers, if they are set to anything below normal, because the values of the `BaseLayer.BlendModes` enumerator changed.
* experimental support for texture changes
* fix some typos
* formatting + some improvements
* Some final touches, i think it's ready now
* moved a function to the shaderloader
* formatting
* add a void
* Blend group layers on `DrawingAlgos.blend_layers()`
* Support group layer blending on the canvas
* Allow editing of group layer properties
* Fix issues with group layer blending in canvas, and unite common code
* Group layers can now be used as clipping masks
* Make move tool preview work on child layers
* Change OffsetImage's `blend_layers()` to support group layer blending
* Support group layer blending in the canvas preview
* Fix layer blending mode, clipping mask opacity and cel opacity not being updated automatically if the layer/cel changed is not selected
* Add a pass through blending mode to layer groups
Fingers crossed that no bugs were introduced
* Fix issue with layers that belong to pass through groups not updating their textures on the canvas automatically on undo
You currently cannot move multiple cels on different layers, they still act as swapping. Eventually I'd also like to implement moving cels between different layers, but they would also have to be on the same frame. I don't think moving cels between different layers and frames at the same time is possible.
This has no effect on non-Steam builds. Steam achievements are mostly for fun, but can also be educational because they can let users know of certain features and functionalities. It's using the GodotSteam GDExtension, but because I do not want to bloat the GitHub repository with things that are not needed for most builds, I decided not to include the GDExtension files, and instead check if the `Steam` class exists in `ClassDB`. The new SteamManager class pretty much does nothing on non-Steam builds, so do not worry about bloat.
In the future we could even take advantage of more of Steam's features, such as Cloud storage for pxo files.
This only works for frames at the moment, not layers and cels. Layers may be harder to support because they also have children. Supports both the "move left/right" options and drag and dropping. Frame swapping (with control) only works when one frame is selected, because I am unsure how they should be handled, especially when the selected frames are not continuous.
Didn't encounter any issues on my testing, but more testing is always welcome.
Allows users to change project name and add custom user data. I was not sure where to put this, so I put it under the Edit menu. It might be a good idea to add a new "Project" menu in the future, and perhaps Scale Image, Resize Canvas and Crop to Content/Selection could be placed there, as they always affect the entire project.
The previous backup code was unnecessarily complicated, hard to read/understand and prone to errors. The new system simply stores the save and backup paths in the `Project` class, and stores the backup files inside `user://backups`, instead of having their file paths be in `cache.ini`.
A very simple implementation, not as complex as something like #768 yet, but it can be done in the future.
The main current limitation is that it doesn't work with group layers as of right now.
Godot 4 has changed how ImageTexture works, as now it doesn't work when the Image is empty. Thus, we need to add Images to PixelCels right when they are created, before the linked cel logic is being handled.
