Take an Iterator of TextArea in prepare

examples/hello-world.rs

@@ -101,7 +101,7 @@ async fn run() {
                             width: config.width,
                             height: config.height,
                         },
-                        &[TextArea {
+                        [TextArea {
                             buffer: &buffer,
                             left: 10,
                             top: 10,
@@ -112,7 +112,8 @@ async fn run() {
                                 bottom: 160,
                             },
                             default_color: Color::rgb(255, 255, 255),
-                        }],
+                        }]
+                        .into_iter(),
                         &mut cache,
                     )
                     .unwrap();

src/lib.rs

@@ -96,6 +96,7 @@ impl Default for TextBounds {
 }
 
 /// A text area containing text to be rendered along with its overflow behavior.
+#[derive(Clone, Copy)]
 pub struct TextArea<'a> {
     /// The buffer containing the text to be rendered.
     pub buffer: &'a Buffer,

src/text_render.rs

@@ -61,14 +61,14 @@ impl TextRenderer {
     }
 
     /// Prepares all of the provided text areas for rendering.
-    pub fn prepare_with_depth(
+    pub fn prepare_with_depth<'a>(
         &mut self,
         device: &Device,
         queue: &Queue,
         font_system: &mut FontSystem,
         atlas: &mut TextAtlas,
         screen_resolution: Resolution,
-        text_areas: &[TextArea<'_>],
+        text_areas: impl Iterator<Item = TextArea<'a>> + Clone,
         cache: &mut SwashCache,
         mut metadata_to_depth: impl FnMut(usize) -> f32,
     ) -> Result<(), PrepareError> {
@@ -86,7 +86,7 @@ impl TextRenderer {
             });
         }
 
-        for text_area in text_areas.iter() {
+        for text_area in text_areas.clone() {
             for run in text_area.buffer.layout_runs() {
                 for glyph in run.glyphs.iter() {
                     if atlas.mask_atlas.glyph_cache.contains(&glyph.cache_key) {
@@ -193,7 +193,7 @@ impl TextRenderer {
         let mut glyph_indices: Vec<u32> = Vec::new();
         let mut glyphs_added = 0;
 
-        for text_area in text_areas.iter() {
+        for text_area in text_areas {
             // Note: subpixel positioning is not currently handled, so we always truncate down to
             // the nearest pixel whenever necessary.
             for run in text_area.buffer.layout_runs() {
@@ -351,14 +351,14 @@ impl TextRenderer {
         Ok(())
     }
 
-    pub fn prepare(
+    pub fn prepare<'a>(
         &mut self,
         device: &Device,
         queue: &Queue,
         font_system: &mut FontSystem,
         atlas: &mut TextAtlas,
         screen_resolution: Resolution,
-        text_areas: &[TextArea<'_>],
+        text_areas: impl Iterator<Item = TextArea<'a>> + Clone,
         cache: &mut SwashCache,
     ) -> Result<(), PrepareError> {
         self.prepare_with_depth(