mlt-ffi

Diplomat-based FFI bindings formlt-core, providing MLT <-> MVT conversion and per-feature layer encoding from C, C++ and Kotlin.

API

Type	Purpose
`MltConverter`	`mlt_to_mvt(bytes)`, `mlt_to_mvt_with_limit(bytes, max_bytes)` and `mvt_to_mlt(bytes, options)`
`MltLayerBuilder`	Writes a layer one feature at a time from MVT geometry commands and encodes it into an `MltBuffer`
`MltEncoderOptions`	Builder wrapping `EncoderConfig` - construct with `new()`, toggle flags with setters
`MltBuffer`	Owned byte buffer with `.bytes` / `.len` accessors, `clear()`, and appending encodes
`MltTileStats`	`from_bytes(bytes)` parses a tile without decoding it, then reports each layer's name and bytes
`MltLayerBytes`	One layer's size, split into geometry, property, id and metadata bytes
`ConvertError`	Opaque error with `.kind` (`ConvertErrorKind`) and `.message` accessors
`MltWireVersion`	`V01` (default) or the experimental `V02`
`MltMvtGeometryType`	The MVT geometry type of one `MltLayerBuilder` feature
`ConvertErrorKind`	`InvalidInput`, `EncodingFailed` or `InvalidFeature`

The round-trip tests are the primary documentation for each language:

cargo build --release -p mlt-ffi

just rust::sync-ffi-bindings

Requires diplomat-tool, clang-format, ktlint, and jextract.

just rust::test-ffi-c
just rust::test-ffi-cpp
just rust::test-ffi-kotlin
just rust::test-ffi-java