Scaffold iced_tiny_skia and connect it to iced_renderer

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)
+    }
+}