Auto resize custom class category icon in inspector.

[Daylily-Zeleen]

Before:

After:

Fixed #68962.

[akien-mga]

The fix looks good, my only doubt is whether it's fine to hardcode 16 here, or if that's something we can read from the editor theme?

[Daylily-Zeleen]

I'm not sure, I just copy it from editor_node.h:

Ref<ImageTexture> EditorNode::_load_custom_class_icon(const String &p_path) const {
	if (p_path.length()) {
		Ref<Image> img = memnew(Image);
		Error err = ImageLoader::load_image(p_path, img);
		if (err == OK) {
			img->resize(16 * EDSCALE, 16 * EDSCALE, Image::INTERPOLATE_LANCZOS);
			return ImageTexture::create_from_image(img);
		}
	}
	return nullptr;
}

EDSCALE is a macro that get editor scale, I think the hardcode 16 is a base size, and the real icon size can be auto scale by editor setting.

[YuriSizov]

Same as #71818, I'm not sure why we resize when we can just render it at the size we want.

[Daylily-Zeleen]

Same as #71818, I'm not sure why we resize when we can just render it at the size we want.

To keep discussion at one place, I describe my opnion at here.

[YuriSizov]

Thanks for your contribution! I've incorporated all your work in #75472, so this is superseded now. You are properly credited in the relevant commit.