image-tiff

TIFF decoding and encoding library in pure Rust

Forked from https://github.com/image-rs/image-tiff. Changes: read images containing RGBPalette frames, ignoring colormaps.

Supported

Features

• Baseline spec (other than formats and tags listed below as not supported)
• Multipage
• BigTIFF
• Incremental decoding

Formats

This table lists photometric interpretations and sample formats which are supported for encoding and decoding. The entries are ColorType variants for which sample bit depths are supported. Only samples where all bit depths are equal are currently supported. For example, RGB(8) means that the bit depth [8, 8, 8] is supported and will be interpreted as an 8 bit per channel RGB color type.

PhotometricInterpretation	UINT Format	IEEEFP Format
WhiteIsZero	Gray(8|16|32|64)	Gray(32|64)
BlackIsZero	Gray(8|16|32|64)	Gray(32|64)
RGB	RGB(8|16|32|64), RGBA(8|16|32|64)	RGB(32|64), RGBA(32|64)
RGBPalette
Mask
CMYK	CMYK(8|16|32|64)	CMYK(32|64)
CMYKA	CMYKA(8)
YCbCr
CIELab

Compressions

	Decoding	Encoding
None	✓	✓
LZW	✓	✓
Deflate	✓	✓
PackBits	✓	✓
Fax4	✓	not yet
JPEG	✓	not yet
ZSTD	✓	not yet

Not yet supported

Formats and interpretations not listed above or with empty entries are unsupported.

• Baseline tags
  • ExtraSamples
• Extension tags

Fuzzing

This crate uses cargo-fuzz in order to test the image parser.

After installing it with cargo install cargo-fuzz on a nightly rustc, the fuzzing harness can be run with recommended settings using cargo fuzz run decode_comprehensive -snone -- -dict=fuzz/tiff.dict -timeout=5.