Implement image support for `canvas` widget

5 files changed, 138 insertions, 5 deletions

diff --git a/tiny_skia/Cargo.toml b/tiny_skia/Cargo.toml
index 32ead3e0..323233f0 100644
--- a/tiny_skia/Cargo.toml
+++ b/tiny_skia/Cargo.toml
@@ -15,7 +15,7 @@ workspace = true
 
 [features]
 image = ["iced_graphics/image"]
-svg = ["resvg"]
+svg = ["iced_graphics/svg", "resvg"]
 geometry = ["iced_graphics/geometry"]
 
 [dependencies]
diff --git a/tiny_skia/src/engine.rs b/tiny_skia/src/engine.rs
index 898657c8..c5c4d494 100644
--- a/tiny_skia/src/engine.rs
+++ b/tiny_skia/src/engine.rs
@@ -556,6 +556,7 @@ impl Engine {
                 bounds,
                 rotation,
                 opacity,
+                snap: _,
             } => {
                 let physical_bounds = *bounds * _transformation;
 
diff --git a/tiny_skia/src/geometry.rs b/tiny_skia/src/geometry.rs
index 02b6e1b9..398b54f7 100644
--- a/tiny_skia/src/geometry.rs
+++ b/tiny_skia/src/geometry.rs
@@ -1,10 +1,12 @@
+use crate::core::image;
+use crate::core::svg;
 use crate::core::text::LineHeight;
-use crate::core::{Pixels, Point, Radians, Rectangle, Size, Vector};
+use crate::core::{Color, Pixels, Point, Radians, Rectangle, Size, Vector};
 use crate::graphics::cache::{self, Cached};
 use crate::graphics::geometry::fill::{self, Fill};
 use crate::graphics::geometry::stroke::{self, Stroke};
 use crate::graphics::geometry::{self, Path, Style};
-use crate::graphics::{Gradient, Text};
+use crate::graphics::{Gradient, Image, Text};
 use crate::Primitive;
 
 use std::rc::Rc;
@@ -13,6 +15,7 @@ use std::rc::Rc;
 pub enum Geometry {
     Live {
         text: Vec<Text>,
+        images: Vec<Image>,
         primitives: Vec<Primitive>,
         clip_bounds: Rectangle,
     },
@@ -22,6 +25,7 @@ pub enum Geometry {
 #[derive(Debug, Clone)]
 pub struct Cache {
     pub text: Rc<[Text]>,
+    pub images: Rc<[Image]>,
     pub primitives: Rc<[Primitive]>,
     pub clip_bounds: Rectangle,
 }
@@ -37,10 +41,12 @@ impl Cached for Geometry {
         match self {
             Self::Live {
                 primitives,
+                images,
                 text,
                 clip_bounds,
             } => Cache {
                 primitives: Rc::from(primitives),
+                images: Rc::from(images),
                 text: Rc::from(text),
                 clip_bounds,
             },
@@ -55,6 +61,7 @@ pub struct Frame {
     transform: tiny_skia::Transform,
     stack: Vec<tiny_skia::Transform>,
     primitives: Vec<Primitive>,
+    images: Vec<Image>,
     text: Vec<Text>,
 }
 
@@ -68,6 +75,7 @@ impl Frame {
             clip_bounds,
             stack: Vec::new(),
             primitives: Vec::new(),
+            images: Vec::new(),
             text: Vec::new(),
             transform: tiny_skia::Transform::from_translate(
                 clip_bounds.x,
@@ -238,7 +246,7 @@ impl geometry::frame::Backend for Frame {
         Self::with_clip(clip_bounds)
     }
 
-    fn paste(&mut self, frame: Self, _at: Point) {
+    fn paste(&mut self, frame: Self) {
         self.primitives.extend(frame.primitives);
         self.text.extend(frame.text);
     }
@@ -269,10 +277,82 @@ impl geometry::frame::Backend for Frame {
     fn into_geometry(self) -> Geometry {
         Geometry::Live {
             primitives: self.primitives,
+            images: self.images,
             text: self.text,
             clip_bounds: self.clip_bounds,
         }
     }
+
+    fn draw_image(
+        &mut self,
+        handle: &image::Handle,
+        bounds: Rectangle,
+        filter_method: image::FilterMethod,
+        rotation: Radians,
+        opacity: f32,
+    ) {
+        let (bounds, external_rotation) =
+            transform_rectangle(bounds, self.transform);
+
+        self.images.push(Image::Raster {
+            handle: handle.clone(),
+            filter_method,
+            bounds,
+            rotation: rotation + external_rotation,
+            opacity,
+            snap: false,
+        });
+    }
+
+    fn draw_svg(
+        &mut self,
+        handle: &svg::Handle,
+        bounds: Rectangle,
+        color: Option<Color>,
+        rotation: Radians,
+        opacity: f32,
+    ) {
+        let (bounds, external_rotation) =
+            transform_rectangle(bounds, self.transform);
+
+        self.images.push(Image::Vector {
+            handle: handle.clone(),
+            bounds,
+            color,
+            rotation: rotation + external_rotation,
+            opacity,
+        });
+    }
+}
+
+fn transform_rectangle(
+    rectangle: Rectangle,
+    transform: tiny_skia::Transform,
+) -> (Rectangle, Radians) {
+    let mut top_left = tiny_skia::Point {
+        x: rectangle.x,
+        y: rectangle.y,
+    };
+
+    let mut top_right = tiny_skia::Point {
+        x: rectangle.x + rectangle.width,
+        y: rectangle.y,
+    };
+
+    let mut bottom_left = tiny_skia::Point {
+        x: rectangle.x,
+        y: rectangle.y + rectangle.height,
+    };
+
+    transform.map_point(&mut top_left);
+    transform.map_point(&mut top_right);
+    transform.map_point(&mut bottom_left);
+
+    Rectangle::with_vertices(
+        Point::new(top_left.x, top_left.y),
+        Point::new(top_right.x, top_right.y),
+        Point::new(bottom_left.x, bottom_left.y),
+    )
 }
 
 fn convert_path(path: &Path) -> Option<tiny_skia::Path> {
diff --git a/tiny_skia/src/layer.rs b/tiny_skia/src/layer.rs
index 48fca1d8..9a169f46 100644
--- a/tiny_skia/src/layer.rs
+++ b/tiny_skia/src/layer.rs
@@ -117,6 +117,48 @@ impl Layer {
 
     pub fn draw_image(
         &mut self,
+        image: &Image,
+        transformation: Transformation,
+    ) {
+        match image {
+            Image::Raster {
+                handle,
+                filter_method,
+                bounds,
+                rotation,
+                opacity,
+                snap: _,
+            } => {
+                self.draw_raster(
+                    handle.clone(),
+                    *filter_method,
+                    *bounds,
+                    transformation,
+                    *rotation,
+                    *opacity,
+                );
+            }
+            Image::Vector {
+                handle,
+                color,
+                bounds,
+                rotation,
+                opacity,
+            } => {
+                self.draw_svg(
+                    handle.clone(),
+                    *color,
+                    *bounds,
+                    transformation,
+                    *rotation,
+                    *opacity,
+                );
+            }
+        }
+    }
+
+    pub fn draw_raster(
+        &mut self,
         handle: image::Handle,
         filter_method: image::FilterMethod,
         bounds: Rectangle,
@@ -130,6 +172,7 @@ impl Layer {
             bounds: bounds * transformation,
             rotation,
             opacity,
+            snap: false,
         };
 
         self.images.push(image);
diff --git a/tiny_skia/src/lib.rs b/tiny_skia/src/lib.rs
index 6ec60158..f09e5aa3 100644
--- a/tiny_skia/src/lib.rs
+++ b/tiny_skia/src/lib.rs
@@ -330,6 +330,7 @@ impl graphics::geometry::Renderer for Renderer {
         match geometry {
             Geometry::Live {
                 primitives,
+                images,
                 text,
                 clip_bounds,
             } => {
@@ -339,6 +340,10 @@ impl graphics::geometry::Renderer for Renderer {
                     transformation,
                 );
 
+                for image in images {
+                    layer.draw_image(&image, transformation);
+                }
+
                 layer.draw_text_group(text, clip_bounds, transformation);
             }
             Geometry::Cache(cache) => {
@@ -348,6 +353,10 @@ impl graphics::geometry::Renderer for Renderer {
                     transformation,
                 );
 
+                for image in cache.images.iter() {
+                    layer.draw_image(image, transformation);
+                }
+
                 layer.draw_text_cache(
                     cache.text,
                     cache.clip_bounds,
@@ -381,7 +390,7 @@ impl core::image::Renderer for Renderer {
         opacity: f32,
     ) {
         let (layer, transformation) = self.layers.current_mut();
-        layer.draw_image(
+        layer.draw_raster(
             handle,
             filter_method,
             bounds,