imageFromNative function

Implementation

MpImage imageFromNative(bindings.MpImagePtr image, {String? task}) {
  final NativeScope scope = NativeScope(task: task);
  try {
    final int width = bindings.MpImageGetWidth(image);
    final int height = bindings.MpImageGetHeight(image);
    final bindings.MpImageFormat format = bindings.MpImageGetFormat(image);
    final int samples = width * height * bindings.MpImageGetChannels(image);
    final ffi.Pointer<ffi.Pointer<ffi.Char>> error = scope.errorOutput();
    return switch (format) {
      bindings.MpImageFormat.kMpImageFormatSrgb ||
      bindings.MpImageFormat.kMpImageFormatSrgba ||
      bindings.MpImageFormat.kMpImageFormatGray8 => _uint8ImageFromNative(
        scope,
        image,
        _dartImageFormat(format),
        width,
        height,
        samples,
        error,
      ),
      bindings.MpImageFormat.kMpImageFormatGray16 ||
      bindings.MpImageFormat.kMpImageFormatSrgb48 ||
      bindings.MpImageFormat.kMpImageFormatSrgba64 => _uint16ImageFromNative(
        scope,
        image,
        _dartImageFormat(format),
        width,
        height,
        samples,
        error,
      ),
      bindings.MpImageFormat.kMpImageFormatVec32F1 ||
      bindings.MpImageFormat.kMpImageFormatVec32F2 ||
      bindings.MpImageFormat.kMpImageFormatVec32F4 => _floatImageFromNative(
        scope,
        image,
        _dartImageFormat(format),
        width,
        height,
        samples,
        error,
      ),
      bindings.MpImageFormat.kMpImageFormatUnknown => throw MpException(
        MpStatus.dataLoss,
        'The native task returned an image with an unknown format.',
        task: task,
      ),
    };
  } finally {
    scope.release();
  }
}