Enum png::decoder::stream::FormatErrorInner

pub(crate) enum FormatErrorInner {
    CrcMismatch {
        crc_val: u32,
        crc_sum: u32,
        chunk: ChunkType,
    },
    InvalidSignature,
    UnexpectedEof,
    UnexpectedEndOfChunk,
    MissingIhdr,
    MissingFctl,
    MissingImageData,
    ChunkBeforeIhdr {
        kind: ChunkType,
    },
    AfterIdat {
        kind: ChunkType,
    },
    AfterPlte {
        kind: ChunkType,
    },
    OutsidePlteIdat {
        kind: ChunkType,
    },
    DuplicateChunk {
        kind: ChunkType,
    },
    ApngOrder {
        present: u32,
        expected: u32,
    },
    ShortPalette {
        expected: usize,
        len: usize,
    },
    PaletteRequired,
    InvalidColorBitDepth {
        color_type: ColorType,
        bit_depth: BitDepth,
    },
    ColorWithBadTrns(ColorType),
    InvalidDimensions,
    InvalidBitDepth(u8),
    InvalidColorType(u8),
    InvalidDisposeOp(u8),
    InvalidBlendOp(u8),
    InvalidUnit(u8),
    InvalidSrgbRenderingIntent(u8),
    UnknownCompressionMethod(u8),
    UnknownFilterMethod(u8),
    UnknownInterlaceMethod(u8),
    BadSubFrameBounds {},
    CorruptFlateStream {
        err: DecompressionError,
    },
    NoMoreImageData,
    BadTextEncoding(TextDecodingError),
    FdatShorterThanFourBytes,
}

Variants

CrcMismatch

Fields

crc_val: u32

Stored CRC32 value

crc_sum: u32

Calculated CRC32 sum

chunk: ChunkType

The chunk type that has the CRC mismatch.

Bad framing.

InvalidSignature

Not a PNG, the magic signature is missing.

UnexpectedEof

End of file, within a chunk event.

UnexpectedEndOfChunk

End of file, while expecting more image data.

MissingIhdr

Ihdr must occur.

MissingFctl

Fctl must occur if an animated chunk occurs.

MissingImageData

Image data that was indicated in IHDR or acTL is missing.

ChunkBeforeIhdr

Fields

kind: ChunkType

4.3., Must be first.

AfterIdat

Fields

kind: ChunkType

4.3., some chunks must be before IDAT.

AfterPlte

Fields

kind: ChunkType

4.3., some chunks must be before PLTE.

OutsidePlteIdat

Fields

kind: ChunkType

4.3., some chunks must be between PLTE and IDAT.

DuplicateChunk

Fields

kind: ChunkType

4.3., some chunks must be unique.

ApngOrder

Fields

present: u32

The sequence number in the chunk.

expected: u32

The one that should have been present.

Specifically for fdat there is an embedded sequence number for chunks.

ShortPalette

Fields

expected: usize

len: usize

The palette did not even contain a single pixel data.

PaletteRequired

A palletized image did not have a palette.

InvalidColorBitDepth

Fields

color_type: ColorType

bit_depth: BitDepth

The color-depth combination is not valid according to Table 11.1.

ColorWithBadTrns(ColorType)

InvalidDimensions

The image width or height is zero.

InvalidBitDepth(u8)

InvalidColorType(u8)

InvalidDisposeOp(u8)

InvalidBlendOp(u8)

InvalidUnit(u8)

InvalidSrgbRenderingIntent(u8)

The rendering intent of the sRGB chunk is invalid.

UnknownCompressionMethod(u8)

UnknownFilterMethod(u8)

UnknownInterlaceMethod(u8)

BadSubFrameBounds

Fields

The subframe is not in bounds of the image. TODO: fields with relevant data.

CorruptFlateStream

Fields

err: DecompressionError

The compression of the data stream was faulty.

NoMoreImageData

The image data chunk was too short for the expected pixel count.

BadTextEncoding(TextDecodingError)

Bad text encoding

FdatShorterThanFourBytes

fdAT shorter than 4 bytes

Trait Implementations

impl Debug for FormatErrorInner

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl From<FormatErrorInner> for FormatError

fn from(inner: FormatErrorInner) -> Self

Converts to this type from the input type.