Turn Photo into drawing

showbits-thermal-printer/src/drawer/photo.rs

@@ -0,0 +1,60 @@
+use image::{Luma, Pixel, RgbaImage};
+use showbits_common::{
+    color::{BLACK, WHITE},
+    widgets::{Image, Text},
+    Node, Tree, WidgetExt,
+};
+use taffy::{
+    style_helpers::{length, percent},
+    AlignItems, Display, FlexDirection,
+};
+
+use crate::printer::Printer;
+
+use super::{Context, Drawing};
+
+pub struct PhotoDrawing {
+    pub image: RgbaImage,
+    pub title: String,
+}
+
+impl Drawing for PhotoDrawing {
+    fn draw(&self, printer: &mut Printer, ctx: &mut Context) -> anyhow::Result<()> {
+        let mut tree = Tree::<Context>::new(WHITE);
+
+        let mut image = self.image.clone();
+        for pixel in image.pixels_mut() {
+            let [l] = pixel.to_luma().0;
+            let l = l as f32 / 255.0; // Convert to [0, 1]
+            let l = 1.0 - (0.4 * (1.0 - l)); // Lerp to [0.6, 1]
+            let l = (l.clamp(0.0, 1.0) * 255.0) as u8; // Convert back to [0, 255]
+            *pixel = Luma([l]).to_rgba();
+        }
+
+        let image = Image::new(image)
+            .with_dither_palette(&[BLACK, WHITE])
+            .node()
+            .register(&mut tree)?;
+
+        let title = Text::new()
+            .with_metrics(Text::default_metrics().scale(2.0))
+            .and_plain(&self.title)
+            .widget(&mut ctx.font_stuff)
+            .node()
+            .register(&mut tree)?;
+
+        let root = Node::empty()
+            .with_size_width(percent(1.0))
+            .with_display(Display::Flex)
+            .with_flex_direction(FlexDirection::Column)
+            .with_align_items(Some(AlignItems::Center))
+            .with_gap(length(8.0))
+            .and_child(image)
+            .and_child(title)
+            .register(&mut tree)?;
+
+        printer.print_tree(&mut tree, ctx, root)?;
+        printer.feed()?;
+        Ok(())
+    }
+}