Stop creating image pipeline when unnecessary

wgpu/src/texture/atlas/allocator.rs

@@ -1,69 +0,0 @@
-use guillotiere::{AtlasAllocator, Size};
-
-pub struct Allocator {
-    raw: AtlasAllocator,
-    allocations: usize,
-}
-
-impl Allocator {
-    pub fn new(size: u32) -> Allocator {
-        let raw = AtlasAllocator::new(Size::new(size as i32, size as i32));
-
-        Allocator {
-            raw,
-            allocations: 0,
-        }
-    }
-
-    pub fn allocate(&mut self, width: u32, height: u32) -> Option<Region> {
-        let allocation =
-            self.raw.allocate(Size::new(width as i32, height as i32))?;
-
-        self.allocations += 1;
-
-        Some(Region { allocation })
-    }
-
-    pub fn deallocate(&mut self, region: &Region) {
-        self.raw.deallocate(region.allocation.id);
-
-        self.allocations = self.allocations.saturating_sub(1);
-    }
-
-    pub fn is_empty(&self) -> bool {
-        self.allocations == 0
-    }
-}
-
-pub struct Region {
-    allocation: guillotiere::Allocation,
-}
-
-impl Region {
-    pub fn position(&self) -> (u32, u32) {
-        let rectangle = &self.allocation.rectangle;
-
-        (rectangle.min.x as u32, rectangle.min.y as u32)
-    }
-
-    pub fn size(&self) -> (u32, u32) {
-        let size = self.allocation.rectangle.size();
-
-        (size.width as u32, size.height as u32)
-    }
-}
-
-impl std::fmt::Debug for Allocator {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        write!(f, "Allocator")
-    }
-}
-
-impl std::fmt::Debug for Region {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        f.debug_struct("Region")
-            .field("id", &self.allocation.id)
-            .field("rectangle", &self.allocation.rectangle)
-            .finish()
-    }
-}