fix: preserve native module compatibility

Author: Som5ra

.github/workflows/ci.yml

@@ -52,6 +52,31 @@ jobs:
           PY
       - name: Build native backend
         run: python -m fastvisionops.build
+      - name: Verify portable native build
+        run: |
+          python -m fastvisionops.build \
+            --no-openmp \
+            --output "${RUNNER_TEMP}/libfastvisionops-portable.so"
+          python - <<'PY'
+          import os
+          import numpy as np
+
+          from fastvisionops import NativeBackend
+
+          backend = NativeBackend(
+              os.path.join(
+                  os.environ["RUNNER_TEMP"],
+                  "libfastvisionops-portable.so",
+              )
+          )
+          np.testing.assert_array_equal(
+              backend.nms(
+                  [[0, 0, 10, 10], [1, 1, 9, 9], [20, 20, 30, 30]],
+                  [0.9, 0.8, 0.7],
+              ),
+              [0, 2],
+          )
+          PY
       - name: Run test suite
         run: python -m unittest discover -s tests -v
       - name: Smoke-test benchmark runners

fastvisionops/native/__init__.py

@@ -4,15 +4,21 @@
     CBackend,
     NativeBackend,
     batch_multiclass_nms,
+    hwc_to_chw_normalize,
+    hwc_to_chw_normalize_batched,
     load_backend,
     multiclass_nms,
     nms,
 )
+from .build import DEFAULT_OUTPUT
 
 __all__ = [
     "CBackend",
+    "DEFAULT_OUTPUT",
     "NativeBackend",
     "batch_multiclass_nms",
+    "hwc_to_chw_normalize",
+    "hwc_to_chw_normalize_batched",
     "load_backend",
     "multiclass_nms",
     "nms",

tests/test_package_layout.py

@@ -6,9 +6,19 @@
 from fastvisionops.bbox import nms as bbox_compat_nms
 from fastvisionops.build import SOURCE, build_native_backend
 from fastvisionops.mask import mask_nms as mask_compat_nms
-from fastvisionops.native import NativeBackend
-from fastvisionops.native.backend import NativeBackend as BackendImplementation
+from fastvisionops.native import (
+    DEFAULT_OUTPUT,
+    NativeBackend,
+    hwc_to_chw_normalize as native_hwc_to_chw_normalize,
+    hwc_to_chw_normalize_batched as native_hwc_to_chw_normalize_batched,
+)
+from fastvisionops.native.backend import (
+    NativeBackend as BackendImplementation,
+    hwc_to_chw_normalize as native_hwc_to_chw_normalize_implementation,
+    hwc_to_chw_normalize_batched as native_batched_implementation,
+)
 from fastvisionops.native.build import (
+    DEFAULT_OUTPUT as native_default_output,
     build_native_backend as native_build_native_backend,
 )
 from fastvisionops.postprocess import mask_nms as postprocess_mask_nms
@@ -47,6 +57,15 @@ def test_mask_import_paths_share_one_implementation(self):
     def test_preprocess_and_native_packages_expose_implementations(self):
         self.assertIs(hwc_to_chw_normalize, numpy_hwc_to_chw_normalize)
         self.assertIs(NativeBackend, BackendImplementation)
+        self.assertIs(
+            native_hwc_to_chw_normalize,
+            native_hwc_to_chw_normalize_implementation,
+        )
+        self.assertIs(
+            native_hwc_to_chw_normalize_batched,
+            native_batched_implementation,
+        )
+        self.assertIs(DEFAULT_OUTPUT, native_default_output)
         self.assertIs(build_native_backend, native_build_native_backend)
 
     def test_native_source_is_colocated_with_backend(self):