improvements

src/text.rs

@@ -44,7 +44,13 @@ pub fn create_text_object(brush: &mut GlyphBrush<Vec<TextVertex>>, renderer: &mu
         uploaded_texture = update_text_texture(None, renderer, rect, text_data);
     }, convert_vertices) {
         Ok(BrushAction::Draw(quads)) => {
-            uploaded_mesh = update_text_quads(quads, uploaded_texture.unwrap(), None, renderer);
+            let t = if let Some(tex) = uploaded_texture {
+                tex
+            } else {
+                let brush_size = brush.texture_dimensions();
+                update_text_texture(None, renderer, Rectangle { min: [0, 0], max: [brush_size.0, brush_size.1] }, &[]).unwrap()
+            };
+            uploaded_mesh = update_text_quads(quads, t, None, renderer);
         },
         Ok(BrushAction::ReDraw) => {},
         Err(BrushError::TextureTooSmall { suggested }) => {