reject binding type multisampled when on a float filterable sample type (#3686)

CHANGELOG.md

@@ -143,6 +143,7 @@ By @cwfitzgerald in [#3671](https://github.com/gfx-rs/wgpu/pull/3671).
 - Make error descriptions all upper case. By @cwfitzgerald in [#3549](https://github.com/gfx-rs/wgpu/pull/3549)
 - Don't include ANSI terminal color escape sequences in shader module validation error messages. By @jimblandy in [#3591](https://github.com/gfx-rs/wgpu/pull/3591)
 - Report error messages from DXC compile. By @Davidster in [#3632](https://github.com/gfx-rs/wgpu/pull/3632)
+- Error in native when using a filterable `TextureSampleType::Float` on a multisample `BindingType::Texture`. By @mockersf in [#3686](https://github.com/gfx-rs/wgpu/pull/3686)
 
 #### WebGPU
 

wgpu-core/src/binding_model.rs

@@ -29,6 +29,8 @@ pub enum BindGroupLayoutEntryError {
     StorageTextureReadWrite,
     #[error("Arrays of bindings unsupported for this type of binding")]
     ArrayUnsupported,
+    #[error("Multisampled binding with sample type `TextureSampleType::Float` must have filterable set to false.")]
+    SampleTypeFloatFilterableBindingMultisampled,
     #[error(transparent)]
     MissingFeatures(#[from] MissingFeatures),
     #[error(transparent)]

wgpu-core/src/device/mod.rs

@@ -22,7 +22,7 @@ use hal::{CommandEncoder as _, Device as _};
 use parking_lot::{Mutex, MutexGuard};
 use smallvec::SmallVec;
 use thiserror::Error;
-use wgt::{BufferAddress, TextureFormat, TextureViewDimension};
+use wgt::{BufferAddress, TextureFormat, TextureSampleType, TextureViewDimension};
 
 use std::{borrow::Cow, iter, mem, num::NonZeroU32, ops::Range, ptr};
 
@@ -1694,6 +1694,16 @@ impl<A: HalApi> Device<A> {
                     Some(wgt::Features::TEXTURE_BINDING_ARRAY),
                     WritableStorage::No,
                 ),
+                Bt::Texture {
+                    multisampled: true,
+                    sample_type: TextureSampleType::Float { filterable: true },
+                    ..
+                } => {
+                    return Err(binding_model::CreateBindGroupLayoutError::Entry {
+                        binding: entry.binding,
+                        error: binding_model::BindGroupLayoutEntryError::SampleTypeFloatFilterableBindingMultisampled,
+                    });
+                }
                 Bt::Texture { .. } => (
                     Some(wgt::Features::TEXTURE_BINDING_ARRAY),
                     WritableStorage::No,