.

t/src/canvas/mod.rs

@@ -0,0 +1,52 @@
+use std::path::Path;
+use std::sync::Arc;
+use eframe::egui::{Color32, ColorImage, Context, ImageData, TextureHandle, TextureOptions};
+use eframe::egui::load::SizedTexture;
+use image::{RgbImage};
+
+mod _draw;
+
+
+#[derive(Clone)]
+pub struct Canvas {
+    image: RgbImage,
+    handle: Option<TextureHandle>,
+}
+
+impl Canvas {
+    
+    pub fn new(path: impl AsRef<Path>) -> Self {
+        Self {
+            image: image::open(path)
+                .unwrap()
+                .to_rgb8(),
+            handle: None,
+        }
+    }
+    
+    pub fn rgba(&self) -> &RgbImage { &self.image }
+    pub fn rgba_mut(&mut self) -> &RgbImage { &mut self.image }
+
+    pub fn image(&mut self, ctx: &Context) -> SizedTexture {
+        let handle = self.handle.get_or_insert_with(|| {
+            let img = ColorImage::new(
+                [self.image.width() as _, self.image.height() as _],
+                self.image
+                    .pixels()
+                    .map(|a| Color32::from_rgb(a.0[0], a.0[1], a.0[2]))
+                    .collect(),
+            );
+            ctx.load_texture(
+                "_temp",
+                ImageData::Color(Arc::new(img)),
+                TextureOptions::LINEAR
+            )
+        });
+        SizedTexture::new(handle.id(), handle.size_vec2())
+    }
+    
+    pub fn refresh(&mut self) {
+        self.handle = None
+    }
+    
+}