def test_adds_the_alpha_option(self):
with open(
os.path.join(
os.path.dirname(os.path.dirname(
os.path.abspath(__file__))), "data", "warped_rgb.vrt"),
'r') as f:
orig_vrt = f.read()
modif_vrt = gdal2tiles.add_alpha_band_to_string_vrt(orig_vrt)
vrt_root = ElementTree.fromstring(modif_vrt)
alpha_band_option = vrt_root.find(".//GDALWarpOptions/DstAlphaBand")
self.assertIsNotNone(alpha_band_option)
self.assertEqual(alpha_band_option.text, "4")
with open(
os.path.join(
os.path.dirname(os.path.dirname(
os.path.abspath(__file__))), "data",
"warped_grey.vrt"), 'r') as f:
orig_vrt = f.read()
modif_vrt = gdal2tiles.add_alpha_band_to_string_vrt(orig_vrt)
vrt_root = ElementTree.fromstring(modif_vrt)
alpha_band_option = vrt_root.find(".//GDALWarpOptions/DstAlphaBand")
self.assertIsNotNone(alpha_band_option)
self.assertEqual(alpha_band_option.text, "2")
def test_adds_the_alpha_option(self):
with open(os.path.join(
os.path.dirname(os.path.dirname(os.path.abspath(__file__))),
"data",
"warped_rgb.vrt"), 'r') as f:
orig_vrt = f.read()
modif_vrt = gdal2tiles.add_alpha_band_to_string_vrt(orig_vrt)
vrt_root = ElementTree.fromstring(modif_vrt)
alpha_band_option = vrt_root.find(".//GDALWarpOptions/DstAlphaBand")
self.assertIsNotNone(alpha_band_option)
self.assertEqual(alpha_band_option.text, "4")
with open(os.path.join(
os.path.dirname(os.path.dirname(os.path.abspath(__file__))),
"data",
"warped_grey.vrt"), 'r') as f:
orig_vrt = f.read()
modif_vrt = gdal2tiles.add_alpha_band_to_string_vrt(orig_vrt)
vrt_root = ElementTree.fromstring(modif_vrt)
alpha_band_option = vrt_root.find(".//GDALWarpOptions/DstAlphaBand")
self.assertIsNotNone(alpha_band_option)
self.assertEqual(alpha_band_option.text, "2")
def test_band_is_in_the_right_place(self):
"""
This is likely not necessary from a file format/machine standpoint, but is much better for a
human looking at the file
"""
with open(
os.path.join(
os.path.dirname(os.path.dirname(
os.path.abspath(__file__))), "data", "warped_rgb.vrt"),
'r') as f:
orig_vrt = f.read()
modif_vrt = gdal2tiles.add_alpha_band_to_string_vrt(orig_vrt)
vrt_root = ElementTree.fromstring(modif_vrt)
nb_bands = 0
for elem in list(vrt_root):
if elem.tag == "VRTRasterBand":
nb_bands += 1
# Band should be numbered in increasing order, starting at 1
self.assertEqual(elem.get("band"), str(nb_bands))
else:
if nb_bands:
# If we have already seen bands, exits, they should be all grouped
break
self.assertEqual(nb_bands, 4)
def test_band_is_in_the_right_place(self):
"""
This is likely not necessary from a file format/machine standpoint, but is much better for a
human looking at the file
"""
with open(os.path.join(
os.path.dirname(os.path.dirname(os.path.abspath(__file__))),
"data",
"warped_rgb.vrt"), 'r') as f:
orig_vrt = f.read()
modif_vrt = gdal2tiles.add_alpha_band_to_string_vrt(orig_vrt)
vrt_root = ElementTree.fromstring(modif_vrt)
nb_bands = 0
for elem in list(vrt_root):
if elem.tag == "VRTRasterBand":
nb_bands += 1
# Band should be numbered in increasing order, starting at 1
self.assertEqual(elem.get("band"), str(nb_bands))
else:
if nb_bands:
# If we have already seen bands, exits, they should be all grouped
break
self.assertEqual(nb_bands, 4)
def test_adds_the_init_dest_option(self):
with open(os.path.join(
os.path.dirname(os.path.dirname(os.path.abspath(__file__))),
"data",
"warped_rgb.vrt"), 'r') as f:
orig_vrt = f.read()
modif_vrt = gdal2tiles.add_alpha_band_to_string_vrt(orig_vrt)
vrt_root = ElementTree.fromstring(modif_vrt)
init_dest_option = vrt_root.find(".//GDALWarpOptions/Option[@name='INIT_DEST']")
self.assertIsNotNone(init_dest_option)
self.assertEqual(init_dest_option.text, "0")
def test_adds_the_correct_band_info_3_bands(self):
with open(os.path.join(
os.path.dirname(os.path.dirname(os.path.abspath(__file__))),
"data",
"warped_rgb.vrt"), 'r') as f:
orig_vrt = f.read()
modif_vrt = gdal2tiles.add_alpha_band_to_string_vrt(orig_vrt)
vrt_root = ElementTree.fromstring(modif_vrt)
band4 = vrt_root.findall(".//VRTRasterBand[@band='4']")
self.assertIsNotNone(band4)
self.assertEqual(len(band4), 1)
band4_color = band4[0].find("./ColorInterp")
self.assertEqual(band4_color.text, "Alpha")
