Image.save_jpg cannot save to a directory that does not yet exist.

[calzila]

Tested versions

4.4

System information

Windows 11 - Godot 4.4
MacOS 15.3.1 - Godot 4.4

Issue description

When running the Method save_jpg on the class Image, the Method will fail to save to a directory if it does not already exist on the disk.

This may be expected behaviour - however - The Error in the Output Log is very unspecific, reporting only:
ERROR: Can't save JPG at path: 'res://PATH/example/...

Would it be possible to either get the method to generate the required sub-folders needed, to save to any arbitrary path, or, get the ERROR message updated to be more descriptive as to why the JPG failed to save.

(PS - it's assumed that the same happens with the other image export types, but I have not tested these myself).

Relevent Documentation page:
https://docs.godotengine.org/en/stable/classes/class_image.html#class-image-method-save-jpg

Steps to reproduce

1. Use the Method save_jpg to save an image.
2. Input a path for the image to be save to, at some sub-folder that does not yet exist.
3. Observe the ERROR.

Minimal reproduction project (MRP)

N/A

[onnileivo]

This seems to work to check if the directory exists first.

godot\modules\jpg\image_loader_jpegd.cpp

static Error _jpgd_save_func(const String &p_path, const Ref<Image> &p_img, float p_quality) {
	Error err;
	if (!DirAccess::dir_exists_absolute(p_path.get_base_dir())) {
		ERR_FAIL_COND_V_MSG(err, err, vformat("Directory '%s' doesn't exist.", p_path.get_base_dir()));
	}
	Ref<FileAccess> file = FileAccess::open(p_path, FileAccess::WRITE, &err);
  	ERR_FAIL_COND_V_MSG(err, err, vformat("Can't save JPG at path: '%s'.", p_path));
	ImageLoaderJPGOSFile ob;
	ob.f = file;
	return _jpgd_save_to_output_stream(&ob, p_img, p_quality);
}

[timothyqiu]

The error code ERR_FILE_NOT_FOUND means the directory is not found.