collisionwasm/pkg/collisionwasm.js

Simple but very useful image collision check written in Rust which is compiled to WebAssembly.

let wasm;

let cachedUint8ArrayMemory0 = null;

function getUint8ArrayMemory0() {
    if (cachedUint8ArrayMemory0 === null || cachedUint8ArrayMemory0.byteLength === 0) {
        cachedUint8ArrayMemory0 = new Uint8Array(wasm.memory.buffer);
    }
    return cachedUint8ArrayMemory0;
}

let WASM_VECTOR_LEN = 0;

function passArray8ToWasm0(arg, malloc) {
    const ptr = malloc(arg.length * 1, 1) >>> 0;
    getUint8ArrayMemory0().set(arg, ptr / 1);
    WASM_VECTOR_LEN = arg.length;
    return ptr;
}
/**
 * @param {Uint8Array} data_a
 * @param {number} width_a
 * @param {number} height_a
 * @param {number} offset_x_a
 * @param {number} offset_y_a
 * @param {Uint8Array} data_b
 * @param {number} width_b
 * @param {number} height_b
 * @param {number} offset_x_b
 * @param {number} offset_y_b
 * @param {number} alpha_threshold
 * @returns {boolean}
 */
export function check_collision(data_a, width_a, height_a, offset_x_a, offset_y_a, data_b, width_b, height_b, offset_x_b, offset_y_b, alpha_threshold) {
    const ptr0 = passArray8ToWasm0(data_a, wasm.__wbindgen_malloc);
    const len0 = WASM_VECTOR_LEN;
    const ptr1 = passArray8ToWasm0(data_b, wasm.__wbindgen_malloc);
    const len1 = WASM_VECTOR_LEN;
    const ret = wasm.check_collision(ptr0, len0, width_a, height_a, offset_x_a, offset_y_a, ptr1, len1, width_b, height_b, offset_x_b, offset_y_b, alpha_threshold);
    return ret !== 0;
}

async function __wbg_load(module, imports) {
    if (typeof Response === 'function' && module instanceof Response) {
        if (typeof WebAssembly.instantiateStreaming === 'function') {
            try {
                return await WebAssembly.instantiateStreaming(module, imports);

            } catch (e) {
                if (module.headers.get('Content-Type') != 'application/wasm') {
                    console.warn("`WebAssembly.instantiateStreaming` failed because your server does not serve Wasm with `application/wasm` MIME type. Falling back to `WebAssembly.instantiate` which is slower. Original error:\n", e);

                } else {
                    throw e;
                }
            }
        }

        const bytes = await module.arrayBuffer();
        return await WebAssembly.instantiate(bytes, imports);

    } else {
        const instance = await WebAssembly.instantiate(module, imports);

        if (instance instanceof WebAssembly.Instance) {
            return { instance, module };

        } else {
            return instance;
        }
    }
}

function __wbg_get_imports() {
    const imports = {};
    imports.wbg = {};
    imports.wbg.__wbindgen_init_externref_table = function() {
        const table = wasm.__wbindgen_export_0;
        const offset = table.grow(4);
        table.set(0, undefined);
        table.set(offset + 0, undefined);
        table.set(offset + 1, null);
        table.set(offset + 2, true);
        table.set(offset + 3, false);
        ;
    };

    return imports;
}

function __wbg_init_memory(imports, memory) {

}

function __wbg_finalize_init(instance, module) {
    wasm = instance.exports;
    __wbg_init.__wbindgen_wasm_module = module;
    cachedUint8ArrayMemory0 = null;


    wasm.__wbindgen_start();
    return wasm;
}

function initSync(module) {
    if (wasm !== undefined) return wasm;


    if (typeof module !== 'undefined') {
        if (Object.getPrototypeOf(module) === Object.prototype) {
            ({module} = module)
        } else {
            console.warn('using deprecated parameters for `initSync()`; pass a single object instead')
        }
    }

    const imports = __wbg_get_imports();

    __wbg_init_memory(imports);

    if (!(module instanceof WebAssembly.Module)) {
        module = new WebAssembly.Module(module);
    }

    const instance = new WebAssembly.Instance(module, imports);

    return __wbg_finalize_init(instance, module);
}

async function __wbg_init(module_or_path) {
    if (wasm !== undefined) return wasm;


    if (typeof module_or_path !== 'undefined') {
        if (Object.getPrototypeOf(module_or_path) === Object.prototype) {
            ({module_or_path} = module_or_path)
        } else {
            console.warn('using deprecated parameters for the initialization function; pass a single object instead')
        }
    }

    if (typeof module_or_path === 'undefined') {
        module_or_path = new URL('collisionwasm_bg.wasm', import.meta.url);
    }
    const imports = __wbg_get_imports();

    if (typeof module_or_path === 'string' || (typeof Request === 'function' && module_or_path instanceof Request) || (typeof URL === 'function' && module_or_path instanceof URL)) {
        module_or_path = fetch(module_or_path);
    }

    __wbg_init_memory(imports);

    const { instance, module } = await __wbg_load(await module_or_path, imports);

    return __wbg_finalize_init(instance, module);
}

export { initSync };
export default __wbg_init;