pconvert_rust/
errors.rs

1//! Internal error types definition and external error type conversions.
2
3use image::error::ImageError;
4use std::error::Error;
5use std::fmt::{Display, Formatter, Result};
6use std::io;
7
8/// Error types used across this crate.
9#[derive(Debug)]
10pub enum PConvertError {
11    ArgumentError(String),
12    UnsupportedImageTypeError,
13    IOError(io::Error),
14    ImageLibError(ImageError),
15}
16
17impl Display for PConvertError {
18    fn fmt(&self, formatter: &mut Formatter) -> Result {
19        match self {
20            PConvertError::UnsupportedImageTypeError => write!(
21                formatter,
22                "UnsupportedImageTypeError: images should be PNGs encoded as RGBA8"
23            ),
24            PConvertError::ImageLibError(err) => err.fmt(formatter),
25            PConvertError::IOError(err) => err.fmt(formatter),
26            PConvertError::ArgumentError(msg) => write!(formatter, "{}", msg),
27        }
28    }
29}
30
31impl Error for PConvertError {
32    fn source(&self) -> Option<&(dyn Error + 'static)> {
33        match *self {
34            PConvertError::UnsupportedImageTypeError => None,
35            PConvertError::ArgumentError(_) => None,
36            PConvertError::ImageLibError(ref err) => Some(err),
37            PConvertError::IOError(ref err) => Some(err),
38        }
39    }
40}
41
42impl From<io::Error> for PConvertError {
43    fn from(err: io::Error) -> PConvertError {
44        PConvertError::IOError(err)
45    }
46}
47
48impl From<ImageError> for PConvertError {
49    fn from(err: ImageError) -> PConvertError {
50        PConvertError::ImageLibError(err)
51    }
52}
pconvert_rust/errors.rs

pconvert_rust/
errors.rs
