Crate rpdfium_codec 

Image codecs and stream decode filters for rpdfium — a faithful Rust port of PDFium.

This crate implements the PDF stream decode filters:

• ASCII85Decode — base-85 decoding
• ASCIIHexDecode — hexadecimal decoding
• RunLengthDecode — run-length decoding
• LZWDecode — LZW decompression (PDF variant)
• FlateDecode — zlib/deflate decompression with predictor support
• DCTDecode — JPEG decompression
• CCITTFaxDecode — Group 3 and Group 4 fax decompression
• JBIG2Decode — JBIG2 decompression via hayro-jbig2
• JPXDecode — JPEG 2000 decompression via hayro-jpeg2000

The apply_filter_chain function applies multiple filters in sequence, enforcing security limits on chain length and output size.

Design Principles

• #![forbid(unsafe_code)]
• All deep operations are iterative (explicit stacks), never recursive.
• Security limits enforced: MAX_FILTER_CHAIN_LENGTH, decompressed size limits.

Re-exports

pub use error::DecodeError;

pub use scanline::DctScanlineDecoder;

pub use scanline::FlateScanlineDecoder;

pub use scanline::RandomAccessDecoder;

pub use scanline::ScanlineDecoder;

pub use streaming::StreamingDecoder;

pub use streaming::StreamingDecoderType;

pub use streaming::create_streaming_decoder;

Modules

basic

Basic stream filters — ASCII85, ASCIIHex, RunLength.

error

Error types for the codec crate.

fax

CCITTFaxDecode filter — Group 3 and Group 4 fax decompression.

flate

Flate/LZW decode filters with predictor support.

jbig2

JBIG2Decode filter — JBIG2 decompression.

jpeg

DCTDecode filter — JPEG decompression.

jpx

JPXDecode (JPEG 2000) filter — decodes JPEG 2000 codestreams and JP2 containers.

pipeline

Filter pipeline — applies multiple decode filters in sequence.

scanline

Scanline-based image decoding — yields one row of pixels at a time.

streaming

Streaming (incremental) decode API for large image decompression.

Structs

FilterParams

Parameters for decode filters.

Enums

DecodeFilter

Available PDF stream decode filters.

Functions

apply_filter_chain

Apply a chain of decode filters in sequence.

decode

Decode data using a single filter with the given parameters.