1 files changed, 109 insertions, 0 deletions
diff --git a/webapp/django/contrib/gis/gdal/prototypes/geom.py b/webapp/django/contrib/gis/gdal/prototypes/geom.py
new file mode 100644
index 0000000000..7757f557ad
--- /dev/null
+++ b/webapp/django/contrib/gis/gdal/prototypes/geom.py
@@ -0,0 +1,109 @@
+from datetime import date
+from ctypes import c_char, c_char_p, c_double, c_int, c_ubyte, c_void_p, POINTER
+from django.contrib.gis.gdal.envelope import OGREnvelope
+from django.contrib.gis.gdal.libgdal import lgdal, gdal_version
+from django.contrib.gis.gdal.prototypes.errcheck import check_bool, check_envelope
+from django.contrib.gis.gdal.prototypes.generation import \
+    const_string_output, double_output, geom_output, int_output, \
+    srs_output, string_output, void_output
+
+# Some prototypes need to be aware of what version GDAL we have.
+major, minor = map(int, gdal_version().split('.')[:2])
+if major <= 1 and minor <= 4:
+    GEOJSON = False
+else:
+    GEOJSON = True
+
+### Generation routines specific to this module ###
+def env_func(f, argtypes):
+    "For getting OGREnvelopes."
+    f.argtypes = argtypes
+    f.restype = None
+    f.errcheck = check_envelope
+    return f
+
+def pnt_func(f):
+    "For accessing point information."
+    return double_output(f, [c_void_p, c_int])
+
+def topology_func(f):
+    f.argtypes = [c_void_p, c_void_p]
+    f.restype = c_int
+    f.errchck = check_bool
+    return f
+
+### OGR_G ctypes function prototypes ###
+
+# GeoJSON routines, if supported.
+if GEOJSON:
+    from_json = geom_output(lgdal.OGR_G_CreateGeometryFromJson, [c_char_p])
+    to_json = string_output(lgdal.OGR_G_ExportToJson, [c_void_p], str_result=True)
+else:
+    from_json = False
+    to_json = False
+
+# GetX, GetY, GetZ all return doubles.
+getx = pnt_func(lgdal.OGR_G_GetX)
+gety = pnt_func(lgdal.OGR_G_GetY)
+getz = pnt_func(lgdal.OGR_G_GetZ)
+    
+# Geometry creation routines.
+from_wkb = geom_output(lgdal.OGR_G_CreateFromWkb, [c_char_p, c_void_p, POINTER(c_void_p), c_int], offset=-2)
+from_wkt = geom_output(lgdal.OGR_G_CreateFromWkt, [POINTER(c_char_p), c_void_p, POINTER(c_void_p)], offset=-1)
+create_geom = geom_output(lgdal.OGR_G_CreateGeometry, [c_int])
+clone_geom = geom_output(lgdal.OGR_G_Clone, [c_void_p])
+get_geom_ref = geom_output(lgdal.OGR_G_GetGeometryRef, [c_void_p, c_int])
+get_boundary = geom_output(lgdal.OGR_G_GetBoundary, [c_void_p])
+geom_convex_hull = geom_output(lgdal.OGR_G_ConvexHull, [c_void_p])
+geom_diff = geom_output(lgdal.OGR_G_Difference, [c_void_p, c_void_p])
+geom_intersection = geom_output(lgdal.OGR_G_Intersection, [c_void_p, c_void_p])
+geom_sym_diff = geom_output(lgdal.OGR_G_SymmetricDifference, [c_void_p, c_void_p])
+geom_union = geom_output(lgdal.OGR_G_Union, [c_void_p, c_void_p])
+
+# Geometry modification routines.
+add_geom = void_output(lgdal.OGR_G_AddGeometry, [c_void_p, c_void_p])
+import_wkt = void_output(lgdal.OGR_G_ImportFromWkt, [c_void_p, POINTER(c_char_p)])
+
+# Destroys a geometry
+destroy_geom = void_output(lgdal.OGR_G_DestroyGeometry, [c_void_p], errcheck=False)
+
+# Geometry export routines.
+to_wkb = void_output(lgdal.OGR_G_ExportToWkb, None, errcheck=True) # special handling for WKB.
+to_wkt = string_output(lgdal.OGR_G_ExportToWkt, [c_void_p, POINTER(c_char_p)])
+to_gml = string_output(lgdal.OGR_G_ExportToGML, [c_void_p], str_result=True)
+get_wkbsize = int_output(lgdal.OGR_G_WkbSize, [c_void_p])
+
+# Geometry spatial-reference related routines.
+assign_srs = void_output(lgdal.OGR_G_AssignSpatialReference, [c_void_p, c_void_p], errcheck=False)
+get_geom_srs = srs_output(lgdal.OGR_G_GetSpatialReference, [c_void_p])
+
+# Geometry properties
+get_area = double_output(lgdal.OGR_G_GetArea, [c_void_p])
+get_centroid = void_output(lgdal.OGR_G_Centroid, [c_void_p, c_void_p])
+get_dims = int_output(lgdal.OGR_G_GetDimension, [c_void_p])
+get_coord_dims = int_output(lgdal.OGR_G_GetCoordinateDimension, [c_void_p])
+
+get_geom_count = int_output(lgdal.OGR_G_GetGeometryCount, [c_void_p])
+get_geom_name = const_string_output(lgdal.OGR_G_GetGeometryName, [c_void_p])
+get_geom_type = int_output(lgdal.OGR_G_GetGeometryType, [c_void_p])
+get_point_count = int_output(lgdal.OGR_G_GetPointCount, [c_void_p])
+get_point = void_output(lgdal.OGR_G_GetPoint, [c_void_p, c_int, POINTER(c_double), POINTER(c_double), POINTER(c_double)], errcheck=False)
+geom_close_rings = void_output(lgdal.OGR_G_CloseRings, [c_void_p], errcheck=False)
+
+# Topology routines.
+ogr_contains = topology_func(lgdal.OGR_G_Contains)
+ogr_crosses = topology_func(lgdal.OGR_G_Crosses)
+ogr_disjoint = topology_func(lgdal.OGR_G_Disjoint)
+ogr_equals = topology_func(lgdal.OGR_G_Equals)
+ogr_intersects = topology_func(lgdal.OGR_G_Intersects)
+ogr_overlaps = topology_func(lgdal.OGR_G_Overlaps)
+ogr_touches = topology_func(lgdal.OGR_G_Touches)
+ogr_within = topology_func(lgdal.OGR_G_Within)
+
+# Transformation routines.
+geom_transform = void_output(lgdal.OGR_G_Transform, [c_void_p, c_void_p])
+geom_transform_to = void_output(lgdal.OGR_G_TransformTo, [c_void_p, c_void_p])
+
+# For retrieving the envelope of the geometry.
+get_envelope = env_func(lgdal.OGR_G_GetEnvelope, [c_void_p, POINTER(OGREnvelope)])
+