libdart_openmvg/lib/archimedes_mobile_lib.dart

// import 'dart:async';
import 'dart:ffi';
import 'dart:io';
import 'dart:typed_data';
// import 'dart:isolate';
// import 'dart:ui';
import "package:ffi/ffi.dart";
import "package:path/path.dart" show dirname, join;
import 'dart:io' show Platform;

import 'archimedes_mobile_lib_bindings_generated.dart';

const String _libName = 'archimedes_mobile_lib';
final here = dirname(Platform.script.path);
final build = join(dirname(here), "build");

/// The dynamic library in which the symbols for [ArchimedesMobileLibBindings] can be found.
final DynamicLibrary _dylib = () {
  if (Platform.isMacOS || Platform.isIOS) {
    return DynamicLibrary.open(join(build, '$_libName.framework', _libName));
  }
  if (Platform.isAndroid || Platform.isLinux) {
    return DynamicLibrary.open(join(build, 'lib$_libName.so'));
  }
  if (Platform.isWindows) {
    return DynamicLibrary.open(join('$_libName.dll'));
  }
  throw UnsupportedError('Unknown platform: ${Platform.operatingSystem}');
}();

/// The bindings to the native functions in [_dylib].
final ArchimedesMobileLibBindings _bindings =
    ArchimedesMobileLibBindings(_dylib);

int getImageData(Pointer<Frame> frame, Pointer<UnsignedChar> data) =>
    _bindings.archimedes_get_image_data(frame, data);

Pointer<Frame> newFrame(
        Pointer<Uint8> data, int dataLen, int w, int h, int depth) =>
    _bindings.new_frame_from_data(data, dataLen, w, h, depth);

void main(List<String> arguments) {
  final assets = join(dirname(here), "assets");
  final testFrames = join(assets, "test", "frames");
  final firstFrame = join(testFrames, "0001.png");
  final f = File(firstFrame);
  final l = f.readAsBytesSync().cast();
  final myPointer = malloc<Uint8>(l.length);
  for (int i = 0; i < l.length; ++i) {
    myPointer[i] = l[i];
    print(myPointer[i]);
  }

  Pointer<Frame> frame = newFrame(myPointer, l.length, 768, 768, 64);

  Pointer<UnsignedChar> data = malloc<UnsignedChar>(l.length * 4);

  getImageData(frame, data);
}