inverse uv scaling for compressed mesh data in godot 4.2

godot_uv_scale_inverse.txt

// Adjusts UV and UV2 vectors based on provided uv_scale
void adjust_uv_scale(input_data &input, godot::Vector4 uv_scale) {
	// If the uv_scale is an empty/default vector, no adjustment is necessary.
	if (uv_scale == godot::Vector4())
		return;

	// Adjust UV coordinates
	for (auto &uv : input.uvs) {
		// The UV is shifted from a [0.5,1] range to [0,0.5] and then scaled according to the uv_scale.x and uv_scale.y.
		// see: godot/servers/rendering_server.cpp:718 (line number might change obviously)
		uv = (uv - godot::Vector2(0.5, 0.5)) * godot::Vector2(uv_scale.x, uv_scale.y);
	}

	// Adjust UV2 coordinates
	for (auto &uv2 : input.uv2s) {
		// The UV2 is adjusted in the same manner as UV.
		// see: servers/rendering_server.cpp:745 (line number might change obviously)
		uv2 = (uv2 - godot::Vector2(0.5, 0.5)) * godot::Vector2(uv_scale.x, uv_scale.y);
	}
}

If defined, uv scale can be accessed with:
godot::RenderingServer::get_singleton()->mesh_get_surface(mesh.get_rid(), surface_index)["uv_scale"]