Fix ASTC feature selection in the webgl backend (#3934)

* Update glow to a new minor version, improve gles adapter astc feature selection
* Update Cargo.lock
* Add changelog entry
* Improve cfg flags to filter out emscripten

CHANGELOG.md

@@ -77,6 +77,7 @@ Bottom level categories:
 - Fix OpenGL/EGL backend not respecting non-sRGB texture formats in `SurfaceConfiguration`. by @liquidev in [#3817](https://github.com/gfx-rs/wgpu/pull/3817)
 - Make write- and read-only marked buffers match non-readonly layouts. by @fornwall in [#3893](https://github.com/gfx-rs/wgpu/pull/3893)
 - Fix leaking X11 connections. by @wez in [#3924](https://github.com/gfx-rs/wgpu/pull/3924)
+- Fix ASTC feature selection in the webgl backend. by @expenses in [#3934](https://github.com/gfx-rs/wgpu/pull/3934)
 
 #### Metal
 

Cargo.toml

@@ -122,7 +122,7 @@ hassle-rs = "0.10.0"
 
 # Gles dependencies
 khronos-egl = "4.1"
-glow = "0.12.2"
+glow = "0.12.3"
 glutin = "0.29.1"
 
 # wasm32 dependencies

wgpu-hal/Cargo.toml

@@ -66,7 +66,7 @@ rustc-hash = "1.1"
 log = "0.4"
 
 # backend: Gles
-glow = { version = "0.12.2", optional = true }
+glow = { version = "0.12.3", optional = true }
 
 [dependencies.wgt]
 package = "wgpu-types"

wgpu-hal/src/gles/adapter.rs

@@ -397,8 +397,27 @@ impl super::Adapter {
         if extensions.contains("WEBGL_compressed_texture_astc")
             || extensions.contains("GL_OES_texture_compression_astc")
         {
-            features.insert(wgt::Features::TEXTURE_COMPRESSION_ASTC);
-            features.insert(wgt::Features::TEXTURE_COMPRESSION_ASTC_HDR);
+            #[cfg(all(target_arch = "wasm32", not(target_os = "emscripten")))]
+            {
+                if context
+                    .glow_context
+                    .compressed_texture_astc_supports_ldr_profile()
+                {
+                    features.insert(wgt::Features::TEXTURE_COMPRESSION_ASTC);
+                }
+                if context
+                    .glow_context
+                    .compressed_texture_astc_supports_hdr_profile()
+                {
+                    features.insert(wgt::Features::TEXTURE_COMPRESSION_ASTC_HDR);
+                }
+            }
+
+            #[cfg(any(not(target_arch = "wasm32"), target_os = "emscripten"))]
+            {
+                features.insert(wgt::Features::TEXTURE_COMPRESSION_ASTC);
+                features.insert(wgt::Features::TEXTURE_COMPRESSION_ASTC_HDR);
+            }
         } else {
             features.set(
                 wgt::Features::TEXTURE_COMPRESSION_ASTC,