pre generate grayscale palettes

Cargo.lock

@@ -1519,6 +1519,7 @@ version = "0.2.0"
 dependencies = [
  "better-panic",
  "crossterm",
+ "konst",
  "palette",
  "rand",
  "ratatui",

midi/src/midi_edit.rs

@@ -132,9 +132,7 @@ impl MidiEditor {
     pub fn clip_status (&self) -> impl Content<TuiOut> + '_ {
         let (color, name, length, looped) = if let Some(clip) = self.clip().as_ref().map(|p|p.read().unwrap()) {
             (clip.color, clip.name.clone(), clip.length, clip.looped)
-        } else {
-            (ItemPalette::from(Tui::g(64)), String::new().into(), 0, false)
-        };
+        } else { (ItemPalette::G[64], String::new().into(), 0, false) };
         row!(
             FieldV(color, "Edit", format!("{name} ({length})")),
             FieldV(color, "Loop", looped.to_string())
@@ -143,9 +141,7 @@ impl MidiEditor {
     pub fn edit_status (&self) -> impl Content<TuiOut> + '_ {
         let (color, length) = if let Some(clip) = self.clip().as_ref().map(|p|p.read().unwrap()) {
             (clip.color, clip.length)
-        } else {
-            (ItemPalette::from(Tui::g(64)), 0)
-        };
+        } else { (ItemPalette::G[64], 0) };
         let time_pos = self.time_pos();
         let time_zoom  = self.time_zoom().get();
         let time_lock  = if self.time_lock().get() { "[lock]" } else { "      " };

midi/src/midi_launch.rs

@@ -47,7 +47,7 @@ pub trait HasPlayClip: HasClock {
     fn next_status (&self) -> impl Content<TuiOut> {
         let mut time: Arc<str> = String::from("--.-.--").into();
         let mut name: Arc<str> = String::from("").into();
-        let mut color = ItemPalette::from(Tui::g(64));
+        let mut color = ItemPalette::G[64];
         let clock = self.clock();
         if let Some((t, Some(clip))) = self.next_clip() {
             let clip = clip.read().unwrap();

midi/src/piano_h.rs

@@ -28,9 +28,7 @@ impl PianoHorizontal {
             buffer: RwLock::new(Default::default()).into(),
             point:  MidiPointModel::default(),
             clip: clip.cloned(),
-            color: clip.as_ref()
-                .map(|p|p.read().unwrap().color)
-                .unwrap_or(ItemPalette::from(ItemColor::from(Tui::g(64)))),
+            color: clip.as_ref().map(|p|p.read().unwrap().color).unwrap_or(ItemPalette::G[64]),
         };
         piano.redraw();
         piano
@@ -270,7 +268,7 @@ impl MidiViewer for PianoHorizontal {
     fn set_clip (&mut self, clip: Option<&Arc<RwLock<MidiClip>>>) {
         *self.clip_mut() = clip.cloned();
         self.color = clip.map(|p|p.read().unwrap().color)
-            .unwrap_or(ItemPalette::from(ItemColor::from(Tui::g(64))));
+            .unwrap_or(ItemPalette::G[64]);
         self.redraw();
     }
 }

tek/src/lib.rs

@@ -1107,7 +1107,7 @@ trait HasScenes: HasSelection + HasEditor + Send + Sync {
     }
     fn scene_header <'a> (&'a self) -> ThunkBox<'a, TuiOut> {
         (move||{
-            let last_color = Arc::new(RwLock::new(ItemPalette::from(Color::Rgb(0, 0, 0))));
+            let last_color = Arc::new(RwLock::new(ItemPalette::G[0]));
             let selected   = self.selected().scene();
             let iter       = ||self.scenes_sizes(self.is_editing(), 2, 15);
             Map::new(iter, move|(_, scene, y1, y2), i| {

tui/Cargo.toml

@@ -9,6 +9,7 @@ rand = "0.8.5"
 crossterm = "0.28.1"
 ratatui = { version = "0.29.0", features = [ "unstable-widget-ref", "underline-color" ] }
 better-panic = "0.3.0"
+konst = { version = "0.3.16", features = [ "rust_1_83" ] }
 
 tek_edn    = { path = "../edn" }
 tek_input  = { path = "../input" }

tui/src/tui_color.rs

@@ -73,6 +73,14 @@ impl ItemColor {
     pub darkest:  ItemColor,
 }
 impl ItemPalette {
+    pub const G: [Self;256] = {
+        let mut builder = konst::ArrayBuilder::new();
+        let mut index = 0;
+        while !builder.is_full() {
+            builder.push(ItemPalette::G[index]);
+            index++;
+        }
+    };
     pub fn random () -> Self { ItemColor::random().into() }
     pub fn random_near (color: Self, distance: f32) -> Self {
         color.base.mix(ItemColor::random(), distance).into()