Disable bounding box in calc_pixmap

Author: mcara

.github/workflows/ci.yml

@@ -22,15 +22,13 @@ jobs:
       envs: |
         - linux: check-style
         - linux: check-security
-
         - linux: py310-xdist
         - linux: py311-xdist
         - linux: py313-xdist
         - macos: py312-xdist
         - windows: py312-xdist
         - linux: py312-xdist-cov
           coverage: codecov
-
         - linux: py312-xdist-devdeps
     secrets:
       CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}

CHANGES.rst

@@ -4,6 +4,14 @@
 Release Notes
 =============
 
+2.0.1 (2024-12-16)
+==================
+
+- Update ``utils.calc_pixmap`` code to be ready for upcoming changes in GWCS
+  due to which inverse WCS transformations will respect bounding box by
+  disabling the bounding box when computing pixel map. [#164]
+
+
 2.0.0 (2024-10-23)
 ==================
 

drizzle/utils.py

@@ -85,7 +85,21 @@ def calc_pixmap(wcs_from, wcs_to, shape=None):
         )
 
     y, x = np.indices(shape, dtype=np.float64)
-    x, y = wcs_to.world_to_pixel_values(*wcs_from.pixel_to_world_values(x, y))
+
+    # temporarily disable the bounding box:
+    if hasattr(wcs_to, "bounding_box"):
+        orig_bbox = getattr(wcs_to, "bounding_box", None)
+        wcs_to.bounding_box = None
+    else:
+        orig_bbox = None
+    try:
+        x, y = wcs_to.world_to_pixel_values(
+            *wcs_from.pixel_to_world_values(x, y)
+        )
+    finally:
+        if orig_bbox is not None:
+            wcs_to.bounding_box = orig_bbox
+
     pixmap = np.dstack([x, y])
     return pixmap