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),
         })

src/layout/ui.rs

@@ -137,7 +137,6 @@ impl<Ctx> Ui<Ctx> {
     where
         Ctx: 'static,
     {
-        self.free();
         let mut painter = Painter::new(
             &self.widgets,
             &mut self.primitives,
@@ -152,6 +151,7 @@ impl<Ctx> Ui<Ctx> {
         for id in self.updates.drain(..) {
             painter.redraw(&id.id);
         }
+        self.free();
     }
 
     /// free any resources that don't have references anymore

src/render/texture.rs

@@ -1,4 +1,4 @@
-use image::{DynamicImage, EncodableLayout};
+use image::{DynamicImage, EncodableLayout, GenericImageView};
 use wgpu::{util::DeviceExt, *};
 
 use crate::layout::{TextureUpdate, Textures};
@@ -22,6 +22,7 @@ impl GpuTextures {
                 TextureUpdate::Push(image) => self.push(image),
                 TextureUpdate::Set(i, image) => self.set(i, image),
                 TextureUpdate::Free(i) => self.free(i),
+                TextureUpdate::PushFree => self.push_free(),
             }
         }
         changed
@@ -40,6 +41,10 @@ impl GpuTextures {
         let view = self.create_view(image);
         self.views.push(view);
     }
+    fn push_free(&mut self) {
+        self.view_count += 1;
+        self.views.push(self.null_view.clone());
+    }
 
     fn create_view(&self, image: &DynamicImage) -> TextureView {
         let image = image.to_rgba8();