Fix incorrect wgpu mixing

vello/src/lib.rs

@@ -89,10 +89,12 @@ mod shaders;
 mod wgpu_engine;
 
 #[cfg(feature = "wgpu")]
-use std::num::NonZeroUsize;
-use std::sync::{
-    atomic::{AtomicBool, Ordering},
-    Arc,
+use std::{
+    num::NonZeroUsize,
+    sync::{
+        atomic::{AtomicBool, Ordering},
+        Arc,
+    },
 };
 
 /// Styling and composition primitives.
@@ -124,16 +126,15 @@ pub use shaders::FullShaders;
 
 #[cfg(feature = "wgpu")]
 use vello_encoding::Resolver;
-use wgpu::SubmissionIndex;
 #[cfg(feature = "wgpu")]
 use wgpu_engine::{ExternalResource, WgpuEngine};
 
 /// Temporary export, used in `with_winit` for stats
 pub use vello_encoding::BumpAllocators;
 #[cfg(feature = "wgpu")]
 use wgpu::{
-    Buffer, BufferUsages, Device, PipelineCompilationOptions, Queue, SurfaceTexture, TextureFormat,
-    TextureView,
+    Buffer, BufferUsages, Device, PipelineCompilationOptions, Queue, SubmissionIndex,
+    SurfaceTexture, TextureFormat, TextureView,
 };
 #[cfg(all(feature = "wgpu", feature = "wgpu-profiler"))]
 use wgpu_profiler::{GpuProfiler, GpuProfilerSettings};
@@ -239,6 +240,7 @@ pub enum Error {
 #[allow(dead_code)] // this can be unused when wgpu feature is not used
 pub(crate) type Result<T, E = Error> = std::result::Result<T, E>;
 
+#[cfg(feature = "wgpu")]
 type BumpSubmission = (SubmissionIndex, Buffer, Arc<AtomicBool>);
 
 /// Renders a scene into a texture or surface.

vello_encoding/src/estimate.rs

@@ -4,7 +4,7 @@
 //! This utility provides conservative size estimation for buffer allocations backing
 //! GPU bump memory. This estimate relies on heuristics and naturally overestimates.
 
-use super::{BumpAllocatorMemory, BumpAllocators, Transform};
+use super::{BumpAllocators, Transform};
 use peniko::kurbo::{Cap, Join, PathEl, Point, Stroke, Vec2};
 
 const RSQRT_OF_TOL: f64 = 2.2360679775; // tol = 0.2