60 lines
2 KiB
Rust
60 lines
2 KiB
Rust
use std::{error::Error, fmt};
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use crate::colors::{BitDepth, ColorType};
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#[derive(Debug, Clone)]
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#[non_exhaustive]
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pub enum PngError {
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DeflatedDataTooLong(usize),
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TimedOut,
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NotPNG,
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APNGNotSupported,
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APNGOutOfOrder,
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InvalidData,
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TruncatedData,
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ChunkMissing(&'static str),
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InvalidDepthForType(BitDepth, ColorType),
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IncorrectDataLength(usize, usize),
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C2PAMetadataPreventsChanges,
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Other(Box<str>),
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}
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impl Error for PngError {}
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impl fmt::Display for PngError {
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#[inline]
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#[cold]
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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match *self {
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PngError::DeflatedDataTooLong(_) => f.write_str("deflated data too long"),
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PngError::TimedOut => f.write_str("timed out"),
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PngError::NotPNG => f.write_str("Invalid header detected; Not a PNG file"),
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PngError::InvalidData => f.write_str("Invalid data found; unable to read PNG file"),
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PngError::TruncatedData => {
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f.write_str("Missing data in the file; the file is truncated")
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}
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PngError::APNGNotSupported => f.write_str("APNG files are not (yet) supported"),
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PngError::APNGOutOfOrder => f.write_str("APNG chunks are out of order"),
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PngError::ChunkMissing(s) => write!(f, "Chunk {s} missing or empty"),
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PngError::InvalidDepthForType(d, ref c) => {
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write!(f, "Invalid bit depth {d} for color type {c}")
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}
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PngError::IncorrectDataLength(l1, l2) => write!(
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f,
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"Data length {l1} does not match the expected length {l2}"
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),
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PngError::C2PAMetadataPreventsChanges => f.write_str(
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"The image contains C2PA manifest that would be invalidated by any file changes",
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),
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PngError::Other(ref s) => f.write_str(s),
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}
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}
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}
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impl PngError {
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#[cold]
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#[must_use]
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pub fn new(description: &str) -> PngError {
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PngError::Other(description.into())
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}
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}
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