7cc91b1308
Adds an option to skip files when the uncompressed IDAT (or the file size itself) exceeds a certain size. This provides an effective way to limit resource usage in constrained environments. Closes #411.
71 lines
2.5 KiB
Rust
71 lines
2.5 KiB
Rust
use std::{error::Error, fmt};
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use crate::colors::{BitDepth, ColorType};
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#[derive(Debug)]
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#[non_exhaustive]
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pub enum PngError {
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APNGOutOfOrder,
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C2PAMetadataPreventsChanges,
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ChunkMissing(&'static str),
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CRCMismatch([u8; 4]),
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DeflatedDataTooLong(usize),
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IncorrectDataLength(usize, usize),
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InflatedDataTooLong(usize),
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InvalidData,
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InvalidDepthForType(BitDepth, ColorType),
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NotPNG,
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ReadFailed(String, std::io::Error),
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TruncatedData,
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WriteFailed(String, std::io::Error),
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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::APNGOutOfOrder => f.write_str("APNG chunks are out of order"),
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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::ChunkMissing(s) => write!(f, "Chunk {s} missing or empty"),
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PngError::CRCMismatch(ref c) => write!(
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f,
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"CRC mismatch in {} chunk; May be recoverable by using --fix",
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String::from_utf8_lossy(c)
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),
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PngError::DeflatedDataTooLong(_) => f.write_str("Deflated data too long"),
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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::InflatedDataTooLong(max) => write!(
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f,
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"Inflated data would exceed the maximum size ({max} bytes)"
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),
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PngError::InvalidData => f.write_str("Invalid data found; unable to read PNG file"),
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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::NotPNG => f.write_str("Invalid header detected; Not a PNG file"),
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PngError::ReadFailed(ref s, ref e) => write!(f, "Failed to read from {s}: {e}"),
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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::WriteFailed(ref s, ref e) => write!(f, "Failed to write to {s}: {e}"),
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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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