Create a function prototype for the OSR routines that take
the OSRSpatialReference object and return a double value.
"""
return double_output(f, [c_void_p, POINTER(c_int)], errcheck=True)
def units_func(f):
"""
Create a ctypes function prototype for OSR units functions, e.g.,
OSRGetAngularUnits, OSRGetLinearUnits.
"""
return double_output(f, [c_void_p, POINTER(c_char_p)], strarg=True)
# Creation & destruction.
clone_srs = srs_output(std_call('OSRClone'), [c_void_p])
new_srs = srs_output(std_call('OSRNewSpatialReference'), [c_char_p])
release_srs = void_output(lgdal.OSRRelease, [c_void_p], errcheck=False)
destroy_srs = void_output(std_call('OSRDestroySpatialReference'), [c_void_p],
errcheck=False)
srs_validate = void_output(lgdal.OSRValidate, [c_void_p])
# Getting the semi_major, semi_minor, and flattening functions.
semi_major = srs_double(lgdal.OSRGetSemiMajor)
semi_minor = srs_double(lgdal.OSRGetSemiMinor)
invflattening = srs_double(lgdal.OSRGetInvFlattening)
# WKT, PROJ, EPSG, XML importation routines.
from_wkt = void_output(lgdal.OSRImportFromWkt, [c_void_p, POINTER(c_char_p)])
from_proj = void_output(lgdal.OSRImportFromProj4, [c_void_p, c_char_p])
from_epsg = void_output(std_call('OSRImportFromEPSG'), [c_void_p, c_int])
# 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)],
decoding='ascii')
to_gml = string_output(lgdal.OGR_G_ExportToGML, [c_void_p],
str_result=True,
decoding='ascii')
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_dim = int_output(lgdal.OGR_G_GetCoordinateDimension, [c_void_p])
set_coord_dim = void_output(lgdal.OGR_G_SetCoordinateDimension,
[c_void_p, c_int],
errcheck=False)
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],
decoding='ascii')
get_geom_type = int_output(lgdal.OGR_G_GetGeometryType, [c_void_p])
get_point_count = int_output(lgdal.OGR_G_GetPointCount, [c_void_p])
### DataSource ### open_ds = voidptr_output(lgdal.OGROpen, [c_char_p, c_int, POINTER(c_void_p)]) destroy_ds = void_output(lgdal.OGR_DS_Destroy, [c_void_p], errcheck=False) release_ds = void_output(lgdal.OGRReleaseDataSource, [c_void_p]) get_ds_name = const_string_output(lgdal.OGR_DS_GetName, [c_void_p]) get_layer = voidptr_output(lgdal.OGR_DS_GetLayer, [c_void_p, c_int]) get_layer_by_name = voidptr_output(lgdal.OGR_DS_GetLayerByName, [c_void_p, c_char_p]) get_layer_count = int_output(lgdal.OGR_DS_GetLayerCount, [c_void_p]) ### Layer Routines ### get_extent = void_output(lgdal.OGR_L_GetExtent, [c_void_p, POINTER(OGREnvelope), c_int]) get_feature = voidptr_output(lgdal.OGR_L_GetFeature, [c_void_p, c_long]) get_feature_count = int_output(lgdal.OGR_L_GetFeatureCount, [c_void_p, c_int]) get_layer_defn = voidptr_output(lgdal.OGR_L_GetLayerDefn, [c_void_p]) get_layer_srs = srs_output(lgdal.OGR_L_GetSpatialRef, [c_void_p]) get_next_feature = voidptr_output(lgdal.OGR_L_GetNextFeature, [c_void_p]) reset_reading = void_output(lgdal.OGR_L_ResetReading, [c_void_p], errcheck=False) test_capability = int_output(lgdal.OGR_L_TestCapability, [c_void_p, c_char_p]) get_spatial_filter = geom_output(lgdal.OGR_L_GetSpatialFilter, [c_void_p]) set_spatial_filter = void_output(lgdal.OGR_L_SetSpatialFilter, [c_void_p, c_void_p], errcheck=False) set_spatial_filter_rect = void_output(lgdal.OGR_L_SetSpatialFilterRect, [c_void_p, c_double, c_double, c_double, c_double], errcheck=False) ### Feature Definition Routines ### get_fd_geom_type = int_output(lgdal.OGR_FD_GetGeomType, [c_void_p]) get_fd_name = const_string_output(lgdal.OGR_FD_GetName, [c_void_p]) get_feat_name = const_string_output(lgdal.OGR_FD_GetName, [c_void_p]) get_field_count = int_output(lgdal.OGR_FD_GetFieldCount, [c_void_p]) get_field_defn = voidptr_output(lgdal.OGR_FD_GetFieldDefn, [c_void_p, c_int]) ### Feature Routines ###
# 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_dim = int_output(lgdal.OGR_G_GetCoordinateDimension, [c_void_p])
set_coord_dim = void_output(lgdal.OGR_G_SetCoordinateDimension, [c_void_p, c_int], errcheck=False)
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)
# DataSource
open_ds = voidptr_output(lgdal.OGROpen, [c_char_p, c_int, POINTER(c_void_p)])
destroy_ds = void_output(lgdal.OGR_DS_Destroy, [c_void_p], errcheck=False)
release_ds = void_output(lgdal.OGRReleaseDataSource, [c_void_p])
get_ds_name = const_string_output(lgdal.OGR_DS_GetName, [c_void_p])
get_layer = voidptr_output(lgdal.OGR_DS_GetLayer, [c_void_p, c_int])
get_layer_by_name = voidptr_output(lgdal.OGR_DS_GetLayerByName, [c_void_p, c_char_p])
get_layer_count = int_output(lgdal.OGR_DS_GetLayerCount, [c_void_p])
# Layer Routines
get_extent = void_output(lgdal.OGR_L_GetExtent, [c_void_p, POINTER(OGREnvelope), c_int])
get_feature = voidptr_output(lgdal.OGR_L_GetFeature, [c_void_p, c_long])
get_feature_count = int_output(lgdal.OGR_L_GetFeatureCount, [c_void_p, c_int])
get_layer_defn = voidptr_output(lgdal.OGR_L_GetLayerDefn, [c_void_p])
get_layer_srs = srs_output(lgdal.OGR_L_GetSpatialRef, [c_void_p])
get_next_feature = voidptr_output(lgdal.OGR_L_GetNextFeature, [c_void_p])
reset_reading = void_output(lgdal.OGR_L_ResetReading, [c_void_p], errcheck=False)
test_capability = int_output(lgdal.OGR_L_TestCapability, [c_void_p, c_char_p])
get_spatial_filter = geom_output(lgdal.OGR_L_GetSpatialFilter, [c_void_p])
set_spatial_filter = void_output(
lgdal.OGR_L_SetSpatialFilter, [c_void_p, c_void_p], errcheck=False
)
set_spatial_filter_rect = void_output(
lgdal.OGR_L_SetSpatialFilterRect,
[c_void_p, c_double, c_double, c_double, c_double],
errcheck=False,
)
# Feature Definition Routines
get_fd_geom_type = int_output(lgdal.OGR_FD_GetGeomType, [c_void_p])
"""
This module houses the ctypes function prototypes for OGR DataSource
related data structures. OGR_Dr_*, OGR_DS_*, OGR_L_*, OGR_F_*,
OGR_Fld_* routines are relevant here.
"""
from ctypes import POINTER, c_char_p, c_double, c_int, c_long, c_void_p
from django.contrib.gis.gdal.envelope import OGREnvelope
from django.contrib.gis.gdal.libgdal import GDAL_VERSION, lgdal
from django.contrib.gis.gdal.prototypes.generation import (
const_string_output, double_output, geom_output, int64_output, int_output,
srs_output, void_output, voidptr_output,
)
c_int_p = POINTER(c_int) # shortcut type
# Driver Routines
register_all = void_output(lgdal.OGRRegisterAll, [], errcheck=False)
cleanup_all = void_output(lgdal.OGRCleanupAll, [], errcheck=False)
get_driver = voidptr_output(lgdal.OGRGetDriver, [c_int])
get_driver_by_name = voidptr_output(lgdal.OGRGetDriverByName, [c_char_p], errcheck=False)
get_driver_count = int_output(lgdal.OGRGetDriverCount, [])
get_driver_name = const_string_output(lgdal.OGR_Dr_GetName, [c_void_p], decoding='ascii')
# DataSource
open_ds = voidptr_output(lgdal.OGROpen, [c_char_p, c_int, POINTER(c_void_p)])
destroy_ds = void_output(lgdal.OGR_DS_Destroy, [c_void_p], errcheck=False)
release_ds = void_output(lgdal.OGRReleaseDataSource, [c_void_p])
get_ds_name = const_string_output(lgdal.OGR_DS_GetName, [c_void_p])
get_layer = voidptr_output(lgdal.OGR_DS_GetLayer, [c_void_p, c_int])
get_layer_by_name = voidptr_output(lgdal.OGR_DS_GetLayerByName, [c_void_p, c_char_p])
get_layer_count = int_output(lgdal.OGR_DS_GetLayerCount, [c_void_p])
# Layer Routines
get_extent = void_output(lgdal.OGR_L_GetExtent, [c_void_p, POINTER(OGREnvelope), c_int])
Create a function prototype for the OSR routines that take
the OSRSpatialReference object and return a double value.
"""
return double_output(f, [c_void_p, POINTER(c_int)], errcheck=True)
def units_func(f):
"""
Create a ctypes function prototype for OSR units functions, e.g.,
OSRGetAngularUnits, OSRGetLinearUnits.
"""
return double_output(f, [c_void_p, POINTER(c_char_p)], strarg=True)
# Creation & destruction.
clone_srs = srs_output(std_call('OSRClone'), [c_void_p])
new_srs = srs_output(std_call('OSRNewSpatialReference'), [c_char_p])
release_srs = void_output(lgdal.OSRRelease, [c_void_p], errcheck=False)
destroy_srs = void_output(std_call('OSRDestroySpatialReference'), [c_void_p], errcheck=False)
srs_validate = void_output(lgdal.OSRValidate, [c_void_p])
# Getting the semi_major, semi_minor, and flattening functions.
semi_major = srs_double(lgdal.OSRGetSemiMajor)
semi_minor = srs_double(lgdal.OSRGetSemiMinor)
invflattening = srs_double(lgdal.OSRGetInvFlattening)
# WKT, PROJ, EPSG, XML importation routines.
from_wkt = void_output(lgdal.OSRImportFromWkt, [c_void_p, POINTER(c_char_p)])
from_proj = void_output(lgdal.OSRImportFromProj4, [c_void_p, c_char_p])
from_epsg = void_output(std_call('OSRImportFromEPSG'), [c_void_p, c_int])
from_xml = void_output(lgdal.OSRImportFromXML, [c_void_p, c_char_p])