Detailed 32 px imp sprite and finer world pixel rows (540, 1080)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/settings.rs

@@ -151,7 +151,7 @@ pub struct Settings {
     pub ui_factor: u8,   // old interface size (2 large, 3 medium, 4 small; only read to carry old settings over)
     pub ui_size: u16,    // interface size in percent of the standard (100 = 1080 interface rows), 0 = automatic
     pub render_scale: u8, // old pixel-look divisor (no longer used, kept for old settings files)
-    pub pixel_rows: u16,  // pixel look: rows of the world on every screen (270, 360, 480)
+    pub pixel_rows: u16,  // pixel look: rows of the world on every screen (one of PIXEL_ROWS)
     pub touch_ui: u8,     // touch interface: 0 = automatic (after the first touch), 1 = on, 2 = off
     pub debug_fps: bool,                // show FPS and rendering backend
     pub debug_frame_time: bool,          // show the frame-time line and graph
@@ -264,6 +264,13 @@ impl Settings {
     }
 }
 
+// the world's pixel rows of the settings menu (more rows: finer world, detailed sprites fit)
+pub const PIXEL_ROWS: [u16; 5] = [270, 360, 480, 540, 1080];
+
+pub fn pixel_rows(set: u16) -> u32 {
+    if PIXEL_ROWS.contains(&set) { set as u32 } else { 360 }
+}
+
 // the interface sizes of the settings menu in percent (0 = automatic), from small to large
 pub const UI_SIZES: [u16; 9] = [0, 75, 85, 100, 115, 130, 150, 175, 200];