[gles] fix duplicated surface compat format computation

disable f16 for webgl for now again

Author: Wumpf

wgpu-hal/src/gles/adapter.rs

@@ -786,26 +786,6 @@ impl crate::Adapter<super::Api> for super::Adapter {
         &self,
         surface: &super::Surface,
     ) -> Option<crate::SurfaceCapabilities> {
-        let mut formats = if surface.supports_srgb() {
-            vec![
-                wgt::TextureFormat::Rgba8UnormSrgb,
-                #[cfg(not(target_arch = "wasm32"))]
-                wgt::TextureFormat::Bgra8UnormSrgb,
-            ]
-        } else {
-            vec![
-                wgt::TextureFormat::Rgba8Unorm,
-                #[cfg(not(target_arch = "wasm32"))]
-                wgt::TextureFormat::Bgra8Unorm,
-            ]
-        };
-        if self
-            .shared
-            .private_caps
-            .contains(super::PrivateCapabilities::COLOR_BUFFER_HALF_FLOAT)
-        {
-            formats.push(wgt::TextureFormat::Rgba16Float)
-        }
         if surface.presentable {
             let mut formats = vec![
                 wgt::TextureFormat::Rgba8Unorm,
@@ -819,6 +799,14 @@ impl crate::Adapter<super::Api> for super::Adapter {
                     wgt::TextureFormat::Bgra8UnormSrgb,
                 ])
             }
+            #[cfg(not(target_arch = "wasm32"))]
+            if self
+                .shared
+                .private_caps
+                .contains(super::PrivateCapabilities::COLOR_BUFFER_HALF_FLOAT)
+            {
+                formats.push(wgt::TextureFormat::Rgba16Float)
+            }
 
             Some(crate::SurfaceCapabilities {
                 formats,