Scaffold `iced_tiny_skia` and connect it to `iced_renderer`

10 files changed, 318 insertions, 12 deletions

diff --git a/Cargo.toml b/Cargo.toml
index d999febe..b1f5cf66 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -50,6 +50,7 @@ members = [
     "native",
     "renderer",
     "style",
+    "tiny_skia",
     "wgpu",
     "winit",
     "examples/*",
diff --git a/renderer/Cargo.toml b/renderer/Cargo.toml
index 2a179f3a..5ba5d426 100644
--- a/renderer/Cargo.toml
+++ b/renderer/Cargo.toml
@@ -4,8 +4,8 @@ version = "0.1.0"
 edition = "2021"
 
 [features]
-image = ["iced_wgpu/image"]
-svg = ["iced_wgpu/svg"]
+image = ["iced_wgpu/image", "iced_tiny_skia/image"]
+svg = ["iced_wgpu/svg", "iced_tiny_skia/svg"]
 tracing = ["iced_wgpu/tracing"]
 
 [dependencies]
@@ -19,6 +19,10 @@ path = "../native"
 version = "0.7"
 path = "../graphics"
 
+[dependencies.iced_tiny_skia]
+version = "0.1"
+path = "../tiny_skia"
+
 [target.'cfg(not(target_arch = "wasm32"))'.dependencies]
 iced_wgpu = { version = "0.9", path = "../wgpu" }
 
diff --git a/renderer/src/backend.rs b/renderer/src/backend.rs
index 7b09eea8..a46d6f9b 100644
--- a/renderer/src/backend.rs
+++ b/renderer/src/backend.rs
@@ -7,12 +7,14 @@ use std::borrow::Cow;
 
 pub enum Backend {
     Wgpu(iced_wgpu::Backend),
+    TinySkia(iced_tiny_skia::Backend),
 }
 
 impl iced_graphics::Backend for Backend {
     fn trim_measurements(&mut self) {
         match self {
             Self::Wgpu(backend) => backend.trim_measurements(),
+            Self::TinySkia(backend) => backend.trim_measurements(),
         }
     }
 }
@@ -25,12 +27,14 @@ impl backend::Text for Backend {
     fn default_font(&self) -> Font {
         match self {
             Self::Wgpu(backend) => backend.default_font(),
+            Self::TinySkia(backend) => backend.default_font(),
         }
     }
 
     fn default_size(&self) -> f32 {
         match self {
             Self::Wgpu(backend) => backend.default_size(),
+            Self::TinySkia(backend) => backend.default_size(),
         }
     }
 
@@ -45,6 +49,9 @@ impl backend::Text for Backend {
             Self::Wgpu(backend) => {
                 backend.measure(contents, size, font, bounds)
             }
+            Self::TinySkia(backend) => {
+                backend.measure(contents, size, font, bounds)
+            }
         }
     }
 
@@ -66,6 +73,14 @@ impl backend::Text for Backend {
                 position,
                 nearest_only,
             ),
+            Self::TinySkia(backend) => backend.hit_test(
+                contents,
+                size,
+                font,
+                bounds,
+                position,
+                nearest_only,
+            ),
         }
     }
 
@@ -74,6 +89,9 @@ impl backend::Text for Backend {
             Self::Wgpu(backend) => {
                 backend.load_font(font);
             }
+            Self::TinySkia(backend) => {
+                backend.load_font(font);
+            }
         }
     }
 }
@@ -83,6 +101,7 @@ impl backend::Image for Backend {
     fn dimensions(&self, handle: &iced_native::image::Handle) -> Size<u32> {
         match self {
             Self::Wgpu(backend) => backend.dimensions(handle),
+            Self::TinySkia(backend) => backend.dimensions(handle),
         }
     }
 }
@@ -95,6 +114,7 @@ impl backend::Svg for Backend {
     ) -> Size<u32> {
         match self {
             Self::Wgpu(backend) => backend.viewport_dimensions(handle),
+            Self::TinySkia(backend) => backend.viewport_dimensions(handle),
         }
     }
 }
diff --git a/renderer/src/window/compositor.rs b/renderer/src/window/compositor.rs
index ad78d8bf..42afddc4 100644
--- a/renderer/src/window/compositor.rs
+++ b/renderer/src/window/compositor.rs
@@ -6,10 +6,12 @@ pub use iced_graphics::window::compositor::{Information, SurfaceError};
 
 pub enum Compositor<Theme> {
     Wgpu(iced_wgpu::window::Compositor<Theme>),
+    TinySkia(iced_tiny_skia::window::Compositor<Theme>),
 }
 
 pub enum Surface {
     Wgpu(iced_wgpu::window::Surface),
+    TinySkia(iced_tiny_skia::window::Surface),
 }
 
 impl<Theme> iced_graphics::window::Compositor for Compositor<Theme> {
@@ -19,21 +21,31 @@ impl<Theme> iced_graphics::window::Compositor for Compositor<Theme> {
 
     fn new<W: HasRawWindowHandle + HasRawDisplayHandle>(
         settings: Self::Settings,
-        compatible_window: Option<&W>,
+        _compatible_window: Option<&W>,
     ) -> Result<(Self, Self::Renderer), Error> {
-        let (compositor, backend) = iced_wgpu::window::compositor::new(
-            iced_wgpu::Settings {
+        //let (compositor, backend) = iced_wgpu::window::compositor::new(
+        //    iced_wgpu::Settings {
+        //        default_font: settings.default_font,
+        //        default_text_size: settings.default_text_size,
+        //        antialiasing: settings.antialiasing,
+        //        ..iced_wgpu::Settings::from_env()
+        //    },
+        //    compatible_window,
+        //)?;
+
+        //Ok((
+        //    Self::Wgpu(compositor),
+        //    Renderer::new(Backend::Wgpu(backend)),
+        //))
+        let (compositor, backend) =
+            iced_tiny_skia::window::compositor::new(iced_tiny_skia::Settings {
                 default_font: settings.default_font,
                 default_text_size: settings.default_text_size,
-                antialiasing: settings.antialiasing,
-                ..iced_wgpu::Settings::from_env()
-            },
-            compatible_window,
-        )?;
+            });
 
         Ok((
-            Self::Wgpu(compositor),
-            Renderer::new(Backend::Wgpu(backend)),
+            Self::TinySkia(compositor),
+            Renderer::new(Backend::TinySkia(backend)),
         ))
     }
 
@@ -45,6 +57,9 @@ impl<Theme> iced_graphics::window::Compositor for Compositor<Theme> {
             Self::Wgpu(compositor) => {
                 Surface::Wgpu(compositor.create_surface(window))
             }
+            Self::TinySkia(compositor) => {
+                Surface::TinySkia(compositor.create_surface(window))
+            }
         }
     }
 
@@ -58,12 +73,17 @@ impl<Theme> iced_graphics::window::Compositor for Compositor<Theme> {
             (Self::Wgpu(compositor), Surface::Wgpu(surface)) => {
                 compositor.configure_surface(surface, width, height);
             }
+            (Self::TinySkia(compositor), Surface::TinySkia(surface)) => {
+                compositor.configure_surface(surface, width, height);
+            }
+            _ => unreachable!(),
         }
     }
 
     fn fetch_information(&self) -> Information {
         match self {
             Self::Wgpu(compositor) => compositor.fetch_information(),
+            Self::TinySkia(compositor) => compositor.fetch_information(),
         }
     }
 
@@ -90,6 +110,20 @@ impl<Theme> iced_graphics::window::Compositor for Compositor<Theme> {
                     background_color,
                     overlay,
                 ),
+                (
+                    Self::TinySkia(compositor),
+                    Backend::TinySkia(backend),
+                    Surface::TinySkia(surface),
+                ) => iced_tiny_skia::window::compositor::present(
+                    compositor,
+                    backend,
+                    surface,
+                    primitives,
+                    viewport,
+                    background_color,
+                    overlay,
+                ),
+                _ => unreachable!(),
             }
         })
     }
diff --git a/tiny_skia/Cargo.toml b/tiny_skia/Cargo.toml
new file mode 100644
index 00000000..7f4b0f8c
--- /dev/null
+++ b/tiny_skia/Cargo.toml
@@ -0,0 +1,21 @@
+[package]
+name = "iced_tiny_skia"
+version = "0.1.0"
+edition = "2021"
+
+[features]
+image = []
+svg = []
+
+[dependencies]
+raw-window-handle = "0.5"
+softbuffer = "0.2"
+tiny-skia = "0.8"
+
+[dependencies.iced_native]
+version = "0.9"
+path = "../native"
+
+[dependencies.iced_graphics]
+version = "0.7"
+path = "../graphics"
diff --git a/tiny_skia/src/backend.rs b/tiny_skia/src/backend.rs
new file mode 100644
index 00000000..4282a745
--- /dev/null
+++ b/tiny_skia/src/backend.rs
@@ -0,0 +1,87 @@
+use crate::{Font, Settings, Size};
+
+use iced_graphics::backend;
+use iced_graphics::text;
+
+use std::borrow::Cow;
+
+pub struct Backend {
+    default_font: Font,
+    default_text_size: f32,
+}
+
+impl Backend {
+    pub fn new(settings: Settings) -> Self {
+        Self {
+            default_font: settings.default_font,
+            default_text_size: settings.default_text_size,
+        }
+    }
+}
+
+impl iced_graphics::Backend for Backend {
+    fn trim_measurements(&mut self) {
+        // TODO
+    }
+}
+
+impl backend::Text for Backend {
+    const ICON_FONT: Font = Font::Name("Iced-Icons");
+    const CHECKMARK_ICON: char = '\u{f00c}';
+    const ARROW_DOWN_ICON: char = '\u{e800}';
+
+    fn default_font(&self) -> Font {
+        self.default_font
+    }
+
+    fn default_size(&self) -> f32 {
+        self.default_text_size
+    }
+
+    fn measure(
+        &self,
+        _contents: &str,
+        _size: f32,
+        _font: Font,
+        _bounds: Size,
+    ) -> (f32, f32) {
+        // TODO
+        (0.0, 0.0)
+    }
+
+    fn hit_test(
+        &self,
+        _contents: &str,
+        _size: f32,
+        _font: Font,
+        _bounds: Size,
+        _point: iced_native::Point,
+        _nearest_only: bool,
+    ) -> Option<text::Hit> {
+        // TODO
+        None
+    }
+
+    fn load_font(&mut self, _font: Cow<'static, [u8]>) {
+        // TODO
+    }
+}
+
+#[cfg(feature = "image")]
+impl backend::Image for Backend {
+    fn dimensions(&self, _handle: &iced_native::image::Handle) -> Size<u32> {
+        // TODO
+        Size::new(0, 0)
+    }
+}
+
+#[cfg(feature = "svg")]
+impl backend::Svg for Backend {
+    fn viewport_dimensions(
+        &self,
+        _handle: &iced_native::svg::Handle,
+    ) -> Size<u32> {
+        // TODO
+        Size::new(0, 0)
+    }
+}
diff --git a/tiny_skia/src/lib.rs b/tiny_skia/src/lib.rs
new file mode 100644
index 00000000..fce44e9e
--- /dev/null
+++ b/tiny_skia/src/lib.rs
@@ -0,0 +1,16 @@
+pub mod window;
+
+mod backend;
+mod settings;
+
+pub use backend::Backend;
+pub use settings::Settings;
+
+pub use iced_graphics::{Color, Error, Font, Point, Size, Vector, Viewport};
+
+/// A [`tiny-skia`] graphics renderer for [`iced`].
+///
+/// [`tiny-skia`]: https://github.com/RazrFalcon/tiny-skia
+/// [`iced`]: https://github.com/iced-rs/iced
+pub type Renderer<Theme = iced_native::Theme> =
+    iced_graphics::Renderer<Backend, Theme>;
diff --git a/tiny_skia/src/settings.rs b/tiny_skia/src/settings.rs
new file mode 100644
index 00000000..88098345
--- /dev/null
+++ b/tiny_skia/src/settings.rs
@@ -0,0 +1,24 @@
+use crate::Font;
+
+/// The settings of a [`Backend`].
+///
+/// [`Backend`]: crate::Backend
+#[derive(Debug, Clone, Copy, PartialEq)]
+pub struct Settings {
+    /// The default [`Font`] to use.
+    pub default_font: Font,
+
+    /// The default size of text.
+    ///
+    /// By default, it will be set to `16.0`.
+    pub default_text_size: f32,
+}
+
+impl Default for Settings {
+    fn default() -> Settings {
+        Settings {
+            default_font: Font::SansSerif,
+            default_text_size: 16.0,
+        }
+    }
+}
diff --git a/tiny_skia/src/window.rs b/tiny_skia/src/window.rs
new file mode 100644
index 00000000..d8d9378e
--- /dev/null
+++ b/tiny_skia/src/window.rs
@@ -0,0 +1,3 @@
+pub mod compositor;
+
+pub use compositor::{Compositor, Surface};
diff --git a/tiny_skia/src/window/compositor.rs b/tiny_skia/src/window/compositor.rs
new file mode 100644
index 00000000..053bb29b
--- /dev/null
+++ b/tiny_skia/src/window/compositor.rs
@@ -0,0 +1,96 @@
+use crate::{Backend, Color, Error, Renderer, Settings, Viewport};
+
+use iced_graphics::window::compositor::{self, Information, SurfaceError};
+use iced_graphics::Primitive;
+
+use raw_window_handle::{HasRawDisplayHandle, HasRawWindowHandle};
+use std::marker::PhantomData;
+
+pub struct Compositor<Theme> {
+    _theme: PhantomData<Theme>,
+}
+
+pub struct Surface;
+
+impl<Theme> iced_graphics::window::Compositor for Compositor<Theme> {
+    type Settings = Settings;
+    type Renderer = Renderer<Theme>;
+    type Surface = Surface;
+
+    fn new<W: HasRawWindowHandle + HasRawDisplayHandle>(
+        settings: Self::Settings,
+        _compatible_window: Option<&W>,
+    ) -> Result<(Self, Self::Renderer), Error> {
+        let (compositor, backend) = new(settings);
+
+        Ok((compositor, Renderer::new(backend)))
+    }
+
+    fn create_surface<W: HasRawWindowHandle + HasRawDisplayHandle>(
+        &mut self,
+        _window: &W,
+    ) -> Surface {
+        // TODO
+        Surface
+    }
+
+    fn configure_surface(
+        &mut self,
+        _surface: &mut Surface,
+        _width: u32,
+        _height: u32,
+    ) {
+        // TODO
+    }
+
+    fn fetch_information(&self) -> Information {
+        Information {
+            adapter: String::from("CPU"),
+            backend: String::from("tiny-skia"),
+        }
+    }
+
+    fn present<T: AsRef<str>>(
+        &mut self,
+        renderer: &mut Self::Renderer,
+        surface: &mut Self::Surface,
+        viewport: &Viewport,
+        background_color: Color,
+        overlay: &[T],
+    ) -> Result<(), SurfaceError> {
+        renderer.with_primitives(|backend, primitives| {
+            present(
+                self,
+                backend,
+                surface,
+                primitives,
+                viewport,
+                background_color,
+                overlay,
+            )
+        })
+    }
+}
+
+pub fn new<Theme>(settings: Settings) -> (Compositor<Theme>, Backend) {
+    // TODO
+    (
+        Compositor {
+            _theme: PhantomData,
+        },
+        Backend::new(settings),
+    )
+}
+
+pub fn present<Theme, T: AsRef<str>>(
+    _compositor: &mut Compositor<Theme>,
+    _backend: &mut Backend,
+    _surface: &mut Surface,
+    _primitives: &[Primitive],
+    _viewport: &Viewport,
+    _background_color: Color,
+    _overlay: &[T],
+) -> Result<(), compositor::SurfaceError> {
+    // TODO
+    Ok(())
+}