mesh: Remove Texel type alias.

This specific data type is no longer part of the API; implementors of
`texture::Tile` get to pick their own format.

CHANGELOG.md

@@ -65,7 +65,6 @@
       it is up to the texture implementation to convert and shuffle data as needed.
     - Renamed `TextureAllocator` to `texture::Allocator`.
     - Renamed `TextureTile` to `texture::Tile`.
-    - Renamed `Texel` to `texture::Texel`.
     - Renamed `NoTexture` to `texture::NoTexture`.
     - Renamed `NoTextures` to `texture::NoTextures`.
 
@@ -83,6 +82,7 @@
 - `all-is-cubes-mesh` library:
     - `TextureCoordinate` type alias no longer exists.
       Its only use was when implementing `TextureTile`; simply use `f32` instead.
+    - `Texel` type alias no longer exists; callers are free to choose their own texel data type.
 
 ## 0.6.0 (2023-07-29)
 

all-is-cubes-gpu/src/in_wgpu/block_texture.rs

@@ -68,8 +68,8 @@ struct TileBacking {
     ///
     /// Property: `self.handle.unwrap().allocation.volume() == self.data.len()`.
     handle: Option<AlloctreeHandle>,
-    /// Texture data (that might not be sent to the GPU yet).
-    data: Option<Box<[texture::Texel]>>,
+    /// sRGB texture data (that might not be sent to the GPU yet).
+    data: Option<Box<[[u8; 4]]>>,
     /// Whether the data has changed so that we need to send it to the GPU on next
     /// [`AtlasAllocator::flush`].
     dirty: bool,

all-is-cubes-mesh/src/texture.rs

@@ -17,10 +17,6 @@ use all_is_cubes::math::GridArray;
 /// dependents’ texture coordinates are not required to be f32.
 pub(crate) type TextureCoordinate = f32;
 
-/// Color data accepted by [`Allocator`].
-/// The components are sRGB `[R, G, B, A]`.
-pub type Texel = [u8; 4];
-
 /// Unit-of-measure identifier used with [`euclid`](all_is_cubes::euclid) for “whole texels”.
 /// TODO(euclid migration): Better name, and a type alias for the point
 #[allow(clippy::exhaustive_enums)]
@@ -179,7 +175,7 @@ pub(super) fn copy_voxels_to_texture<A: Allocator>(
 /// Helper function to implement the typical case of copying voxels into an X-major, sRGB, RGBA
 /// texture.
 #[doc(hidden)]
-pub fn copy_voxels_into_xmaj_texture(voxels: Vol<&[Evoxel]>, texture: &mut [Texel]) {
+pub fn copy_voxels_into_xmaj_texture(voxels: Vol<&[Evoxel]>, texture: &mut [[u8; 4]]) {
     let bounds = voxels.bounds();
     assert_eq!(bounds.volume(), texture.len());
 

all-is-cubes-port/src/gltf/texture.rs

@@ -265,7 +265,7 @@ mod internal {
     use std::sync::{Arc, Mutex, OnceLock};
 
     /// Texels are written here through tiles and read through planes.
-    pub(super) type TexelsCell = Arc<OnceLock<Vec<texture::Texel>>>;
+    pub(super) type TexelsCell = Arc<OnceLock<Vec<[u8; 4]>>>;
 
     /// Interior-mutable accumulator of textures to put in the atlas.
     #[derive(Clone, Debug, Default)]