egui_glow: allow empty (zero-sized) textures

See https://github.com/emilk/egui/issues/1960

crates/eframe/CHANGELOG.md

@@ -7,6 +7,8 @@ NOTE: [`egui-winit`](../egui-winit/CHANGELOG.md), [`egui_glium`](../egui_glium/C
 ## Unreleased
 * Added `NativeOptions::event_loop_builder` hook for apps to change platform specific event loop options ([#1952](https://github.com/emilk/egui/pull/1952)).
 * Enabled deferred render state initialization to support Android ([#1952](https://github.com/emilk/egui/pull/1952)).
+* Allow empty textures with the glow renderer.
+
 
 ## 0.19.0 - 2022-08-20
 * MSRV (Minimum Supported Rust Version) is now `1.61.0` ([#1846](https://github.com/emilk/egui/pull/1846)).

crates/egui_glow/CHANGELOG.md

@@ -3,6 +3,7 @@ All notable changes to the `egui_glow` integration will be noted in this file.
 
 
 ## Unreleased
+* Allow empty textures.
 
 
 ## 0.19.0 - 2022-08-20

crates/egui_glow/src/painter.rs

@@ -552,12 +552,6 @@ impl Painter {
         data: &[u8],
     ) {
         assert_eq!(data.len(), w * h * 4);
-        assert!(
-            w >= 1 && h >= 1,
-            "Got a texture image of size {}x{}. A texture must at least be one texel wide.",
-            w,
-            h
-        );
         assert!(
             w <= self.max_texture_side && h <= self.max_texture_side,
             "Got a texture image of size {}x{}, but the maximum supported texture side is only {}",