ImageSampler::init_descriptor (#11113)

Shortcut to avoid repetition in code like
#11109.

---------

Co-authored-by: Alice Cecile <alice.i.cecile@gmail.com>

crates/bevy_render/src/texture/image.rs

@@ -202,6 +202,23 @@ impl ImageSampler {
  pub fn nearest() -> ImageSampler {
  ImageSampler::Descriptor(ImageSamplerDescriptor::nearest())
  }
+
+ /// Initialize the descriptor if it is not already initialized.
+ ///
+ /// Descriptor is typically initialized by Bevy when the image is loaded,
+ /// so this is convenient shortcut for updating the descriptor.
+ pub fn get_or_init_descriptor(&mut self) -> &mut ImageSamplerDescriptor {
+ match self {
+ ImageSampler::Default => {
+ *self = ImageSampler::Descriptor(ImageSamplerDescriptor::default());
+ match self {
+ ImageSampler::Descriptor(descriptor) => descriptor,
+ _ => unreachable!(),
+ }
+ }
+ ImageSampler::Descriptor(descriptor) => descriptor,
+ }
+ }
 }
 
 /// A rendering resource for the default image sampler which is set during renderer