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perf(l2): cheaper frames -- less overdraw and blending

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Measured on the L2 (steady full frames): Settings page 37.7 -> 31.4 ms,
Display 41.5 -> 37.9, Contacts 34.6 -> 32.9, Home 37.3 -> 32.4.

- styleSurface() leaves boxes in the page colour unpainted; styleOpaque()
  for the screen and the status bar, which things slide under.
- group() cards clip their corners only while a row is held
  (rowPressable(), shared by the tappable rows).
- rowSlider(): the track an opaque tint (theme::mix(), also behind
  ACCENT_DIM) instead of 20 % accent blended every frame.
- Map buttons, pills, scale, nav bar and the Home minimap labels opaque.
- Screens drift in without the fading cover: its full-screen blend was in
  every entrance frame (page 39 -> 29 ms).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Jakub
2026-09-30 14:30:45 +02:00
co-authored by Claude Opus 5.5
parent f29c280c34
commit abbbdc5ae5
8 changed files with 72 additions and 57 deletions
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examples/companion_radio/ui-lvgl/HomeScreen.h
+2 -2
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@@ -600,7 +600,7 @@ void UITask::buildHomeMap(lv_obj_t* box) {
s_fitted = false;
s_hint = label(s_area, "", THEME_FONT_SMALL, theme::TEXT);
lv_obj_set_style_bg_color(s_hint, lv_color_hex(theme::BG), 0);
lv_obj_set_style_bg_opa(s_hint, LV_OPA_80, 0);
lv_obj_set_style_bg_opa(s_hint, LV_OPA_COVER, 0); // opaque over the tiles, as the map's pills
lv_obj_set_style_radius(s_hint, theme::RADIUS_SM, 0);
lv_obj_set_style_pad_hor(s_hint, 8, 0);
lv_obj_set_style_pad_ver(s_hint, 4, 0);
@@ -609,7 +609,7 @@ void UITask::buildHomeMap(lv_obj_t* box) {
lv_obj_add_flag(s_hint, LV_OBJ_FLAG_HIDDEN);
s_caption = label(s_area, "", THEME_FONT_SMALL, theme::TEXT); // who's on it
lv_obj_set_style_bg_color(s_caption, lv_color_hex(theme::BG), 0);
lv_obj_set_style_bg_opa(s_caption, LV_OPA_80, 0);
lv_obj_set_style_bg_opa(s_caption, LV_OPA_COVER, 0);
lv_obj_set_style_radius(s_caption, theme::RADIUS_SM, 0);
lv_obj_set_style_pad_hor(s_caption, 6, 0);
lv_obj_set_style_pad_ver(s_caption, 2, 0);