execute method
Implementation
void execute(typed.Uint8List sourceBmp) {
final ffi.Pointer<ffi.Uint8> startingPointer = ext_ffi.calloc<ffi.Uint8>(
sourceBmp.length,
);
final pointerList = startingPointer.asTypedList(sourceBmp.length);
pointerList.setAll(0, sourceBmp);
ffiExecution(startingPointer, pointerList);
sourceBmp.setAll(0, pointerList);
ext_ffi.calloc.free(startingPointer);
}