remove unused view and upload buffer, remove use of unsafe, just use …

…resize (was also using reserve wrong anyways)

src/pipeline/cache.rs

@@ -2,7 +2,6 @@ use std::num::NonZeroU32;
 
 pub struct Cache {
     texture: wgpu::Texture,
-    pub(super) view: wgpu::TextureView,
     padded_cache: Vec<u8>
 }
 
@@ -25,19 +24,12 @@ impl Cache {
             sample_count: 1,
         });
 
-        let view = texture.create_view(&wgpu::TextureViewDescriptor::default());
-
-        let upload_buffer = device.create_buffer(&wgpu::BufferDescriptor {
-            label: Some("wgpu_glyph::Cache upload buffer"),
-            size: Self::INITIAL_UPLOAD_BUFFER_SIZE,
-            usage: wgpu::BufferUsage::COPY_DST | wgpu::BufferUsage::COPY_SRC,
-            mapped_at_creation: false,
-        });
+        let mut padded_cache = Vec::new();
+        padded_cache.reserve(Self::INITIAL_UPLOAD_BUFFER_SIZE as usize);
 
         Cache {
             texture,
-            view,
-            padded_cache: Vec::new()
+            padded_cache
         }
     }
 
@@ -62,11 +54,7 @@ impl Cache {
         let padded_width = width + padded_width_padding;
 
         let padded_data_size = (padded_width * height) as u64;
-        self.padded_cache.reserve(padded_data_size as usize);
-
-        unsafe {
-            self.padded_cache.set_len(padded_data_size as usize);
-        }
+        self.padded_cache.resize(padded_data_size as usize, 0);
 
         let padded_data = self.padded_cache.as_mut_slice();