fix view count

src/layout/texture.rs

@@ -3,7 +3,7 @@ use std::{
     sync::mpsc::{Receiver, Sender, channel},
 };
 
-use image::DynamicImage;
+use image::{DynamicImage, GenericImageView};
 
 use crate::{render::TexturePrimitive, util::RefCounter};
 
@@ -25,6 +25,7 @@ pub struct Textures {
 }
 
 pub enum TextureUpdate<'a> {
+    PushFree,
     Push(&'a DynamicImage),
     Set(u32, &'a DynamicImage),
     Free(u32),
@@ -84,7 +85,10 @@ impl Textures {
 
     pub fn updates(&mut self) -> impl Iterator<Item = TextureUpdate<'_>> {
         self.updates.drain(..).map(|u| match u {
-            Update::Push(i) => TextureUpdate::Push(self.images[i as usize].as_ref().unwrap()),
+            Update::Push(i) => self.images[i as usize]
+                .as_ref()
+                .map(TextureUpdate::Push)
+                .unwrap_or(TextureUpdate::PushFree),
             Update::Set(i) => TextureUpdate::Set(i, self.images[i as usize].as_ref().unwrap()),
             Update::Free(i) => TextureUpdate::Free(i),
         })