implement add_srgb_suffix for TextureFormat (#3419)

CHANGELOG.md

@@ -216,6 +216,7 @@ let texture = device.create_texture(&wgpu::TextureDescriptor {
 - Implemented correleation between user timestamps and platform specific presentation timestamps via [`Adapter::get_presentation_timestamp`]. By @cwfitzgerald in [#3240](https://github.com/gfx-rs/wgpu/pull/3240)
 - Added support for `Features::SHADER_PRIMITIVE_INDEX` on all backends. By @cwfitzgerald in [#3272](https://github.com/gfx-rs/wgpu/pull/3272)
 - Implemented `TextureFormat::Stencil8`, allowing for stencil testing without depth components. By @Dinnerbone in [#3343](https://github.com/gfx-rs/wgpu/pull/3343)
+- Implemented `add_srgb_suffix()` for `TextureFormat` for converting linear formats to sRGB. By @Elabajaba in [#3419](https://github.com/gfx-rs/wgpu/pull/3419) 
 
 #### GLES
 

wgpu-types/src/lib.rs

@@ -2580,6 +2580,29 @@ impl TextureFormat {
             _ => *self,
         }
     }
+
+    /// Adds an `Srgb` suffix to the given texture format, if the format supports it.
+    pub fn add_srgb_suffix(&self) -> TextureFormat {
+        match *self {
+            Self::Rgba8Unorm => Self::Rgba8UnormSrgb,
+            Self::Bgra8Unorm => Self::Bgra8UnormSrgb,
+            Self::Bc1RgbaUnorm => Self::Bc1RgbaUnormSrgb,
+            Self::Bc2RgbaUnorm => Self::Bc2RgbaUnormSrgb,
+            Self::Bc3RgbaUnorm => Self::Bc3RgbaUnormSrgb,
+            Self::Bc7RgbaUnorm => Self::Bc7RgbaUnormSrgb,
+            Self::Etc2Rgb8Unorm => Self::Etc2Rgb8UnormSrgb,
+            Self::Etc2Rgb8A1Unorm => Self::Etc2Rgb8A1UnormSrgb,
+            Self::Etc2Rgba8Unorm => Self::Etc2Rgba8UnormSrgb,
+            Self::Astc {
+                block,
+                channel: AstcChannel::Unorm,
+            } => Self::Astc {
+                block,
+                channel: AstcChannel::UnormSrgb,
+            },
+            _ => *self,
+        }
+    }
 }
 
 #[test]