initial text impl

src/render/primitive.rs

@@ -1,5 +1,5 @@
 use crate::{
-    Color, UiRegion,
+    layout::{Color, TextureHandle, UiRegion},
     render::{ArrBuf, data::PrimitiveInstance},
 };
 use bytemuck::Pod;
@@ -8,6 +8,8 @@ use wgpu::*;
 pub struct Primitives {
     pub(super) instances: Vec<PrimitiveInstance>,
     pub(super) data: PrimitiveData,
+    // ensure drawn textures don't get freed
+    pub(crate) drawn_textures: Vec<TextureHandle>,
     pub updated: bool,
 }
 
@@ -16,6 +18,7 @@ impl Default for Primitives {
         Self {
             instances: Default::default(),
             data: Default::default(),
+            drawn_textures: Default::default(),
             updated: true,
         }
     }
@@ -98,6 +101,7 @@ impl Primitives {
         self.updated = true;
         self.instances.clear();
         self.data.clear();
+        self.drawn_textures.clear();
     }
 }