How to transform a gif drawable by loading resource

[YummyLau]

Today, when I ran the sample and tested the effect of gif, I found that when I load the id of a Gif resource, the transform is in effect. If I load a gif resource, the transform does not take effect.

library version

versions.glide = "4.9.0"
versions.glideTransformations = "4.0.1"
versions.glideCompiler = "4.9.0"
versions.gpuImage = "2.0.3"

code show

val gifDrawable = ContextCompat.getDrawable(context, R.drawable.test)
                var context = Utils.isValidContextForGlide(holder.image)
                if (context != null) {
                    Glide.with(holder.image.context)
                            .asDrawable()
//                            .load(gifDrawable)     does not take effect.
                            .load(R.drawable.test)  //  in effect
                            .apply(bitmapTransform(MultiTransformation<Bitmap>(CenterCrop(), MaskTransformation(R.drawable.mask_starfish))))
                            .into(holder.image)
                }

If I use

.load(gifDrawable) 

there is no effect! So I would like to ask the reason, is it my own improper use?

OS detail

• Huawei Honor Magic 2
• Android 9