add async core

ffigen.yaml

@@ -17,6 +17,7 @@ headers:
     - src/calib3d/calib3d.h
     - src/calib3d/calib3d_async.h
     - src/core/core.h
+    - src/core/core_async.h
     - src/core/exception.h
     - src/core/svd.h
     - src/core/svd_async.h
@@ -51,6 +52,7 @@ headers:
     - src/calib3d/calib3d.h
     - src/calib3d/calib3d_async.h
     - src/core/core.h
+    - src/core/core_async.h
     - src/core/exception.h
     - src/core/svd.h
     - src/core/svd_async.h

lib/opencv_dart.dart

@@ -13,17 +13,20 @@ export 'src/core/asyncarray.dart';
 export 'src/core/base.dart';
 export 'src/core/contours.dart';
 export 'src/core/core.dart';
+export 'src/core/core_async.dart';
 export 'src/core/cv_vec.dart';
 export 'src/core/dmatch.dart';
 export 'src/core/error_code.dart';
 export 'src/core/exception.dart';
 export 'src/core/keypoint.dart';
 export 'src/core/mat.dart';
+export 'src/core/mat_async.dart';
 export 'src/core/mat_type.dart';
 export 'src/core/moments.dart';
 export 'src/core/point.dart';
 export 'src/core/rect.dart';
 export 'src/core/rng.dart';
+export 'src/core/rng_async.dart';
 export 'src/core/scalar.dart';
 export 'src/core/size.dart';
 export 'src/core/vec.dart';

lib/src/core/core.dart

@@ -26,12 +26,6 @@ String openCvVersion() {
   return s;
 }
 
-Future<String> openCvVersionAsync() async => cvRunAsync(CFFI.openCVVersion_Async, (c, p) {
-      final s = p.cast<ffi.Pointer<ffi.Char>>().value.toDartString();
-      calloc.free(p);
-      c.complete(s);
-    });
-
 /// Returns full configuration time cmake output.
 ///
 /// Returned value is raw cmake output including version control system revision, compiler version, compiler flags, enabled modules and third party libraries, etc. Output format depends on target architecture.
@@ -43,12 +37,6 @@ String getBuildInformation() {
   return s;
 }
 
-Future<String> getBuildInformationAsync() async => cvRunAsync(CFFI.getBuildInfo_Async, (c, p) {
-      final s = p.cast<ffi.Pointer<ffi.Char>>().value.toDartString();
-      calloc.free(p);
-      c.complete(s);
-    });
-
 /// AbsDiff calculates the per-element absolute difference between two arrays
 /// or between an array and a scalar.
 ///