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|
use crate::core::text;
use crate::core::{Font, Point, Size};
use crate::graphics::backend;
use std::borrow::Cow;
#[allow(clippy::large_enum_variant)]
pub enum Backend {
TinySkia(iced_tiny_skia::Backend),
#[cfg(feature = "wgpu")]
Wgpu(iced_wgpu::Backend),
}
macro_rules! delegate {
($backend:expr, $name:ident, $body:expr) => {
match $backend {
Self::TinySkia($name) => $body,
#[cfg(feature = "wgpu")]
Self::Wgpu($name) => $body,
}
};
}
impl backend::Text for Backend {
const ICON_FONT: Font = Font::with_name("Iced-Icons");
const CHECKMARK_ICON: char = '\u{f00c}';
const ARROW_DOWN_ICON: char = '\u{e800}';
fn default_font(&self) -> Font {
delegate!(self, backend, backend.default_font())
}
fn default_size(&self) -> f32 {
delegate!(self, backend, backend.default_size())
}
fn measure(
&self,
contents: &str,
size: f32,
line_height: text::LineHeight,
font: Font,
bounds: Size,
shaping: text::Shaping,
) -> Size {
delegate!(
self,
backend,
backend.measure(contents, size, line_height, font, bounds, shaping)
)
}
fn hit_test(
&self,
contents: &str,
size: f32,
line_height: text::LineHeight,
font: Font,
bounds: Size,
shaping: text::Shaping,
position: Point,
nearest_only: bool,
) -> Option<text::Hit> {
delegate!(
self,
backend,
backend.hit_test(
contents,
size,
line_height,
font,
bounds,
shaping,
position,
nearest_only,
)
)
}
fn load_font(&mut self, font: Cow<'static, [u8]>) {
delegate!(self, backend, backend.load_font(font));
}
}
#[cfg(feature = "image")]
impl backend::Image for Backend {
fn dimensions(&self, handle: &crate::core::image::Handle) -> Size<u32> {
delegate!(self, backend, backend.dimensions(handle))
}
}
#[cfg(feature = "svg")]
impl backend::Svg for Backend {
fn viewport_dimensions(
&self,
handle: &crate::core::svg::Handle,
) -> Size<u32> {
delegate!(self, backend, backend.viewport_dimensions(handle))
}
}
|
