iShape-swift

Swift Package that bridges the iShape Rust geometry toolkit (via the bundled i_shape_ffi crate) into native Swift APIs. It ships prebuilt static libraries plus thin Swift wrappers so you can run high-performance polygon Boolean operations on Apple platforms without touching Rust directly.

Rebuild the FFI artifacts whenever you change the Rust sources:

cd iShape-swift
./build_ffi.sh

Then build or test with SwiftPM (the script emits static libs for macOS, iOS device, and iOS simulator):

CLANG_MODULE_CACHE_PATH=$(pwd)/.cache/clang swift build --disable-sandbox
CLANG_MODULE_CACHE_PATH=$(pwd)/.cache/clang swift test --disable-sandbox

Quick Start

import iShape_swift

let overlay = IntOverlay()

// Add one subject shape (outer contour plus a hole).
overlay.addSubject([[
    [IntPoint(0, 0), IntPoint(0, 10), IntPoint(10, 10), IntPoint(10, 0)],
    [IntPoint(4, 4), IntPoint(4, 6), IntPoint(6, 6), IntPoint(6, 4)],
]])

overlay.addClip([[
    [IntPoint(5, 0), IntPoint(5, 10), IntPoint(12, 10), IntPoint(12, 0)],
]])

let buffer = FlatShapesBuffer()
overlay.overlay(overlayRule: .union, fillRule: .evenOdd, output: buffer)

let shapes: IntShapes = buffer.toIntShapes()
print(shapes.count)      // -> 1
print(shapes[0].count)   // -> outer contour + one hole

FlatShapesBuffer can be reused across calls and passed over the FFI boundary, while the high-level helpers return Swift-native [[[IntPoint]]] structures for convenience.