allow gles float textures to be multisampled if available (#3183)

CHANGELOG.md

@@ -94,6 +94,7 @@ Bottom level categories:
 #### GLES
 
 - Fixed WebGL not displaying srgb targets correctly if a non-screen filling viewport was previously set. By @Wumpf in [#3093](https://github.com/gfx-rs/wgpu/pull/3093)
+- Fix disallowing multisampling for float textures if otherwise supported. By @Wumpf in [#3183](https://github.com/gfx-rs/wgpu/pull/3183)
 
 #### deno-webgpu
 

wgpu-hal/src/gles/adapter.rs

@@ -716,12 +716,18 @@ impl crate::Adapter<super::Api> for super::Adapter {
 
         let half_float_renderable = private_caps_fn(
             super::PrivateCapabilities::COLOR_BUFFER_HALF_FLOAT,
-            Tfc::COLOR_ATTACHMENT | Tfc::COLOR_ATTACHMENT_BLEND,
+            Tfc::COLOR_ATTACHMENT
+                | Tfc::COLOR_ATTACHMENT_BLEND
+                | sample_count
+                | Tfc::MULTISAMPLE_RESOLVE,
         );
 
         let float_renderable = private_caps_fn(
             super::PrivateCapabilities::COLOR_BUFFER_FLOAT,
-            Tfc::COLOR_ATTACHMENT | Tfc::COLOR_ATTACHMENT_BLEND,
+            Tfc::COLOR_ATTACHMENT
+                | Tfc::COLOR_ATTACHMENT_BLEND
+                | sample_count
+                | Tfc::MULTISAMPLE_RESOLVE,
         );
 
         match format {