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//! Attach an icon to the window of your application.
use std::fmt;
use std::io;
/// The icon of a window.
#[derive(Debug, Clone)]
pub struct Icon(iced_winit::winit::window::Icon);
impl Icon {
/// Creates an icon from 32bpp RGBA data.
pub fn from_rgba(
rgba: Vec<u8>,
width: u32,
height: u32,
) -> Result<Self, Error> {
let raw =
iced_winit::winit::window::Icon::from_rgba(rgba, width, height)?;
Ok(Icon(raw))
}
}
/// An error produced when using `Icon::from_rgba` with invalid arguments.
#[derive(Debug)]
pub enum Error {
/// The provided RGBA data isn't divisble by 4.
///
/// Therefore, it cannot be safely interpreted as 32bpp RGBA pixels.
InvalidData {
/// The length of the provided RGBA data.
byte_count: usize,
},
/// The number of RGBA pixels does not match the provided dimensions.
DimensionsMismatch {
/// The provided width.
width: u32,
/// The provided height.
height: u32,
/// The amount of pixels of the provided RGBA data.
pixel_count: usize,
},
/// The underlying OS failed to create the icon.
OsError(io::Error),
}
impl From<iced_winit::winit::window::BadIcon> for Error {
fn from(error: iced_winit::winit::window::BadIcon) -> Self {
use iced_winit::winit::window::BadIcon;
match error {
BadIcon::ByteCountNotDivisibleBy4 { byte_count } => {
Error::InvalidData { byte_count }
}
BadIcon::DimensionsVsPixelCount {
width,
height,
pixel_count,
..
} => Error::DimensionsMismatch {
width,
height,
pixel_count,
},
BadIcon::OsError(os_error) => Error::OsError(os_error),
}
}
}
impl From<Icon> for iced_winit::winit::window::Icon {
fn from(icon: Icon) -> Self {
icon.0
}
}
impl fmt::Display for Error {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
match self {
Error::InvalidData { byte_count } => {
write!(
f,
"The provided RGBA data (with length {:?}) isn't divisble by \
4. Therefore, it cannot be safely interpreted as 32bpp RGBA \
pixels.",
byte_count,
)
}
Error::DimensionsMismatch {
width,
height,
pixel_count,
} => {
write!(
f,
"The number of RGBA pixels ({:?}) does not match the provided \
dimensions ({:?}x{:?}).",
pixel_count, width, height,
)
}
Error::OsError(e) => write!(
f,
"The underlying OS failed to create the window \
icon: {:?}",
e
),
}
}
}
impl std::error::Error for Error {
fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
Some(self)
}
}
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