Init

src/ui/art.rs

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+use ratatui::style::{Color, Style};
+use ratatui::text::{Line, Span, Text};
+
+use crate::art::ArtImage;
+
+/// Render half-block art as ratatui text: one `▀` per cell, foreground =
+/// top pixel, background = bottom pixel.
+pub fn to_text(art: &ArtImage) -> Text<'static> {
+    let mut lines = Vec::with_capacity(usize::from(art.height_cells));
+    for y in 0..art.height_cells {
+        let mut spans = Vec::with_capacity(usize::from(art.width_cells));
+        for x in 0..art.width_cells {
+            let (top, bottom) = art.cell(x, y);
+            spans.push(Span::styled(
+                "▀",
+                Style::new()
+                    .fg(Color::Rgb(top[0], top[1], top[2]))
+                    .bg(Color::Rgb(bottom[0], bottom[1], bottom[2])),
+            ));
+        }
+        lines.push(Line::from(spans));
+    }
+    Text::from(lines)
+}