CompositorEffect Function _render_callback Doesn't Do Anything

[The-Raphie]

Godot version

v4.3.stable.official [77dcf97d8]

godot-cpp version

4.3.stable

System information

Operating System: EndeavourOS KDE Plasma Version: 6.2.1 KDE Frameworks Version: 6.7.0 Qt Version: 6.8.0 Kernel Version: 6.11.4-arch1-1 (64-bit) Graphics Platform: X11 Processors: 12 × Intel® Core™ i7-10750H CPU @ 2.60GHz Memory: 15.4 GiB of RAM Graphics Processor: NVIDIA GeForce GTX 1660 Ti/PCIe/SSE2 Manufacturer: ASUSTeK COMPUTER INC. Product Name: ROG Zephyrus M15 GU502LU_GU502LU System Version: 1.0

Issue description

When dealing with the CompositerEffect resource, the function _render_callback, which should run every frame, doesn't run at all.

Steps to reproduce

1. Open the minimal reproduction project with Godot 4.3.
2. If the output is not printing the word "Test" repeatedly, then the _render_callback function in GDExtension is not working correctly.

Minimal reproduction project

https://drive.google.com/file/d/1upEw41XvzIDORykg_GxgHs2nBk1jDFLt/view?usp=sharing

Github wouldn't let me upload the .zip directly.

[dsnopek]

Thanks!

This should be fixed by PR godotengine/godot#99981 which will be included in Godot 4.4

[The-Raphie]

@dsnopek Is there any workaround for the time being while 4.3 is the latest stable version?

[dsnopek]

Hm, you could maybe use GDScript to work around it: add a normal method to your C++ class, and then attach a GDScript to it that implements _render_callback to call that method?

Or, alternatively, you could take the Godot 4.3 source and just apply the changes from PR godotengine/godot#99981 and re-compile Godot, so you'd have a custom version with that bug fixed?