jpeg_encoder/
error.rs

1use alloc::fmt::Display;
2use core::error::Error;
3
4/// # The error type for encoding
5#[derive(Debug)]
6pub enum EncodingError {
7    /// An invalid app segment number has been used
8    InvalidAppSegment(u8),
9
10    /// App segment exceeds maximum allowed data length
11    AppSegmentTooLarge(usize),
12
13    /// Color profile exceeds maximum allowed data length
14    IccTooLarge(usize),
15
16    /// Image data is too short
17    BadImageData { length: usize, required: usize },
18
19    /// Width or height is zero
20    ZeroImageDimensions { width: u16, height: u16 },
21
22    /// An io error occurred during writing
23    #[cfg(feature = "std")]
24    IoError(std::io::Error),
25
26    /// An io error occurred during writing (Should be used in no_std cases instead of IoError)
27    Write(alloc::string::String),
28}
29
30#[cfg(feature = "std")]
31impl From<std::io::Error> for EncodingError {
32    fn from(err: std::io::Error) -> EncodingError {
33        EncodingError::IoError(err)
34    }
35}
36
37impl Display for EncodingError {
38    fn fmt(&self, f: &mut alloc::fmt::Formatter<'_>) -> alloc::fmt::Result {
39        use EncodingError::*;
40        match self {
41            InvalidAppSegment(nr) => write!(f, "Invalid app segment number: {}", nr),
42            AppSegmentTooLarge(length) => write!(
43                f,
44                "App segment exceeds maximum allowed data length of 65533: {}",
45                length
46            ),
47            IccTooLarge(length) => write!(
48                f,
49                "ICC profile exceeds maximum allowed data length: {}",
50                length
51            ),
52            BadImageData { length, required } => write!(
53                f,
54                "Image data too small for dimensions and color_type: {} need at least {}",
55                length, required
56            ),
57            ZeroImageDimensions { width, height } => {
58                write!(f, "Image dimensions must be non zero: {}x{}", width, height)
59            }
60            #[cfg(feature = "std")]
61            IoError(err) => err.fmt(f),
62            Write(err) => write!(f, "{}", err),
63        }
64    }
65}
66
67impl Error for EncodingError {
68    #[cfg(feature = "std")]
69    fn source(&self) -> Option<&(dyn Error + 'static)> {
70        match self {
71            EncodingError::IoError(err) => Some(err),
72            _ => None,
73        }
74    }
75}
jpeg_encoder/error.rs

jpeg_encoder/
error.rs
