Added RasterSource/GDALBand GDAL objects (6e08bde8) · Commits · Dom Sekotill / django

MANIFEST.in

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		@@ -26,6 +26,7 @@ recursive-include django/contrib/formtools/tests/templates *
		recursive-include django/contrib/formtools/tests/wizard/wizardtests/templates *
		recursive-include django/contrib/flatpages/fixtures *
		recursive-include django/contrib/flatpages/tests/templates *
		recursive-include django/contrib/gis/gdal/tests/data *
		recursive-include django/contrib/gis/static *
		recursive-include django/contrib/gis/templates *
		recursive-include django/contrib/gis/tests/data *

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		@@ -47,6 +47,7 @@ try:
		from django.contrib.gis.gdal.driver import Driver # NOQA
		from django.contrib.gis.gdal.datasource import DataSource # NOQA
		from django.contrib.gis.gdal.libgdal import gdal_version, gdal_full_version, GDAL_VERSION # NOQA
		from django.contrib.gis.gdal.raster.source import GDALRaster # NOQA
		from django.contrib.gis.gdal.srs import SpatialReference, CoordTransform # NOQA
		from django.contrib.gis.gdal.geometries import OGRGeometry # NOQA
		HAS_GDAL = True

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		@@ -54,8 +54,8 @@ get_band_ds = voidptr_output(lgdal.GDALGetBandDataset, [c_void_p])
		get_band_datatype = int_output(lgdal.GDALGetRasterDataType, [c_void_p])
		get_band_nodata_value = double_output(lgdal.GDALGetRasterNoDataValue, [c_void_p, POINTER(c_int)])
		set_band_nodata_value = void_output(lgdal.GDALSetRasterNoDataValue, [c_void_p, c_double])
		get_band_minimum = double_output(lgdal.GDALGetRasterMinimum, [c_void_p])
		get_band_maximum = double_output(lgdal.GDALGetRasterMaximum, [c_void_p])
		get_band_minimum = double_output(lgdal.GDALGetRasterMinimum, [c_void_p, POINTER(c_int)])
		get_band_maximum = double_output(lgdal.GDALGetRasterMaximum, [c_void_p, POINTER(c_int)])

		### Reprojection routine ###
		reproject_image = void_output(lgdal.GDALReprojectImage, [c_void_p, c_char_p, c_void_p, c_char_p,

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Empty file added.

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		from ctypes import byref, c_int

		from django.contrib.gis.gdal.base import GDALBase
		from django.contrib.gis.gdal.prototypes import raster as capi
		from django.utils.encoding import force_text

		from .const import GDAL_PIXEL_TYPES


		class GDALBand(GDALBase):
		"""
		Wraps a GDAL raster band, needs to be obtained from a GDALRaster object.
		"""
		def __init__(self, source, index):
		self.source = source
		self.ptr = capi.get_ds_raster_band(source.ptr, index)

		@property
		def description(self):
		"""
		Returns the description string of the band.
		"""
		return force_text(capi.get_band_description(self.ptr))

		@property
		def width(self):
		"""
		Width (X axis) in pixels of the band.
		"""
		return capi.get_band_xsize(self.ptr)

		@property
		def height(self):
		"""
		Height (Y axis) in pixels of the band.
		"""
		return capi.get_band_ysize(self.ptr)

		def datatype(self, as_string=False):
		"""
		Returns the GDAL Pixel Datatype for this band.
		"""
		dtype = capi.get_band_datatype(self.ptr)
		if as_string:
		dtype = GDAL_PIXEL_TYPES[dtype]
		return dtype

		@property
		def min(self):
		"""
		Returns the minimum pixel value for this band.
		"""
		return capi.get_band_minimum(self.ptr, byref(c_int()))

		@property
		def max(self):
		"""
		Returns the maximum pixel value for this band.
		"""
		return capi.get_band_maximum(self.ptr, byref(c_int()))

		@property
		def nodata_value(self):
		"""
		Returns the nodata value for this band, or None if it isn't set.
		"""
		nodata_exists = c_int()
		value = capi.get_band_nodata_value(self.ptr, nodata_exists)
		return value if nodata_exists else None