snap text on shader

src/layout/texture.rs

@@ -1,18 +1,17 @@
-use std::ops::Index;
+use std::{
+    ops::Index,
+    sync::mpsc::{Receiver, Sender, channel},
+};
 
 use image::DynamicImage;
 
-use crate::{
-    layout::{UiMsg, UiMsgSender},
-    render::TexturePrimitive,
-    util::RefCounter,
-};
+use crate::{render::TexturePrimitive, util::RefCounter};
 
 #[derive(Clone)]
 pub struct TextureHandle {
     pub inner: TexturePrimitive,
     counter: RefCounter,
-    send: UiMsgSender,
+    send: Sender<u32>,
 }
 
 /// a texture manager for a ui
@@ -21,7 +20,8 @@ pub struct Textures {
     free: Vec<u32>,
     images: Vec<Option<DynamicImage>>,
     updates: Vec<Update>,
-    send: UiMsgSender,
+    send: Sender<u32>,
+    recv: Receiver<u32>,
 }
 
 pub enum TextureUpdate<'a> {
@@ -37,12 +37,14 @@ enum Update {
 }
 
 impl Textures {
-    pub fn new(send: UiMsgSender) -> Self {
+    pub fn new() -> Self {
+        let (send, recv) = channel();
         Self {
             free: Vec::new(),
             images: Vec::new(),
             updates: Vec::new(),
             send,
+            recv,
         }
     }
     pub fn add(&mut self, image: impl Into<DynamicImage>) -> TextureHandle {
@@ -72,10 +74,12 @@ impl Textures {
         }
     }
 
-    pub fn free(&mut self, idx: u32) {
-        self.images[idx as usize] = None;
-        self.updates.push(Update::Free(idx));
-        self.free.push(idx);
+    pub fn free(&mut self) {
+        for idx in self.recv.try_iter() {
+            self.images[idx as usize] = None;
+            self.updates.push(Update::Free(idx));
+            self.free.push(idx);
+        }
     }
 
     pub fn updates(&mut self) -> impl Iterator<Item = TextureUpdate<'_>> {
@@ -90,7 +94,7 @@ impl Textures {
 impl Drop for TextureHandle {
     fn drop(&mut self) {
         if self.counter.drop() {
-            let _ = self.send.send(UiMsg::FreeTexture(self.inner.view_idx));
+            let _ = self.send.send(self.inner.view_idx);
         }
     }
 }
@@ -102,3 +106,9 @@ impl Index<&TextureHandle> for Textures {
         self.images[index.inner.view_idx as usize].as_ref().unwrap()
     }
 }
+
+impl Default for Textures {
+    fn default() -> Self {
+        Self::new()
+    }
+}