js-angusj-clipper/universal/native/PathToNativePath.js

Polygon and line clipping and offsetting library for Javascript / Typescript - a port of Angus Johnson's clipper to WebAssembly / Asm.JS

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.nativePathToPath = exports.doubleArrayToPath = exports.nativePathToDoubleArray = exports.pathToNativePath = exports.doubleArrayToNativePath = exports.pathToDoubleArray = exports.writePathToDoubleArray = exports.getNofItemsForPath = void 0;
var mem_1 = require("./mem");
var coordsPerPoint = 2;
function getNofItemsForPath(path) {
    return 1 + path.length * coordsPerPoint;
}
exports.getNofItemsForPath = getNofItemsForPath;
// js to c++
function writePathToDoubleArray(path, heapBytes, startPtr) {
    var len = path.length;
    heapBytes[startPtr] = len;
    var arrayI = 1 + startPtr;
    for (var i = 0; i < len; i++) {
        heapBytes[arrayI++] = path[i].x;
        heapBytes[arrayI++] = path[i].y;
    }
    return arrayI;
}
exports.writePathToDoubleArray = writePathToDoubleArray;
function pathToDoubleArray(nativeClipperLib, path) {
    var nofItems = getNofItemsForPath(path);
    var heapBytes = (0, mem_1.mallocDoubleArray)(nativeClipperLib, nofItems);
    writePathToDoubleArray(path, heapBytes, 0);
    return heapBytes;
}
exports.pathToDoubleArray = pathToDoubleArray;
function doubleArrayToNativePath(nativeClipperLib, array, freeArray) {
    var p = new nativeClipperLib.Path();
    nativeClipperLib.toPath(p, array.byteOffset);
    if (freeArray) {
        (0, mem_1.freeTypedArray)(nativeClipperLib, array);
    }
    return p;
}
exports.doubleArrayToNativePath = doubleArrayToNativePath;
function pathToNativePath(nativeClipperLib, path) {
    var array = pathToDoubleArray(nativeClipperLib, path);
    return doubleArrayToNativePath(nativeClipperLib, array, true);
}
exports.pathToNativePath = pathToNativePath;
// c++ to js
function nativePathToDoubleArray(nativeClipperLib, nativePath, freeNativePath) {
    var array = nativeClipperLib.fromPath(nativePath);
    if (freeNativePath) {
        nativePath.delete();
    }
    return array;
}
exports.nativePathToDoubleArray = nativePathToDoubleArray;
function doubleArrayToPath(nativeClipperLib, array, _freeDoubleArray, startPtr) {
    var len = array[startPtr];
    var path = [];
    path.length = len;
    var arrayI = 1 + startPtr;
    for (var i = 0; i < len; i++) {
        path[i] = {
            x: array[arrayI++],
            y: array[arrayI++],
        };
    }
    if (_freeDoubleArray) {
        (0, mem_1.freeTypedArray)(nativeClipperLib, array);
    }
    return {
        path: path,
        ptrEnd: arrayI,
    };
}
exports.doubleArrayToPath = doubleArrayToPath;
function nativePathToPath(nativeClipperLib, nativePath, freeNativePath) {
    var array = nativePathToDoubleArray(nativeClipperLib, nativePath, freeNativePath);
    return doubleArrayToPath(nativeClipperLib, array, true, 0).path;
}
exports.nativePathToPath = nativePathToPath;
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