# vim: set fileencoding=utf-8 :
# test helpers
import os
import tempfile
import pytest
import pyvips
IMAGES = os.path.join(os.path.dirname(__file__), os.pardir, 'images')
JPEG_FILE = os.path.join(IMAGES, "йцук.jpg")
SRGB_FILE = os.path.join(IMAGES, "sRGB.icm")
MATLAB_FILE = os.path.join(IMAGES, "sample.mat")
PNG_FILE = os.path.join(IMAGES, "sample.png")
TIF_FILE = os.path.join(IMAGES, "sample.tif")
OME_FILE = os.path.join(IMAGES, "multi-channel-z-series.ome.tif")
ANALYZE_FILE = os.path.join(IMAGES, "t00740_tr1_segm.hdr")
GIF_FILE = os.path.join(IMAGES, "cramps.gif")
WEBP_FILE = os.path.join(IMAGES, "1.webp")
EXR_FILE = os.path.join(IMAGES, "sample.exr")
FITS_FILE = os.path.join(IMAGES, "WFPC2u5780205r_c0fx.fits")
OPENSLIDE_FILE = os.path.join(IMAGES, "CMU-1-Small-Region.svs")
PDF_FILE = os.path.join(IMAGES, "ISO_12233-reschart.pdf")
CMYK_PDF_FILE = os.path.join(IMAGES, "cmyktest.pdf")
SVG_FILE = os.path.join(IMAGES, "vips-profile.svg")
SVGZ_FILE = os.path.join(IMAGES, "vips-profile.svgz")
SVG_GZ_FILE = os.path.join(IMAGES, "vips-profile.svg.gz")
GIF_ANIM_FILE = os.path.join(IMAGES, "cogs.gif")
DICOM_FILE = os.path.join(IMAGES, "dicom_test_image.dcm")
BMP_FILE = os.path.join(IMAGES, "MARBLES.BMP")
NIFTI_FILE = os.path.join(IMAGES, "avg152T1_LR_nifti.nii.gz")
ICO_FILE = os.path.join(IMAGES, "favicon.ico")
HEIC_FILE = os.path.join(IMAGES, "Example1.heic")
unsigned_formats = [pyvips.BandFormat.UCHAR,
pyvips.BandFormat.USHORT,
pyvips.BandFormat.UINT]
signed_formats = [pyvips.BandFormat.CHAR,
pyvips.BandFormat.SHORT,
pyvips.BandFormat.INT]
float_formats = [pyvips.BandFormat.FLOAT,
pyvips.BandFormat.DOUBLE]
complex_formats = [pyvips.BandFormat.COMPLEX,
pyvips.BandFormat.DPCOMPLEX]
int_formats = unsigned_formats + signed_formats
noncomplex_formats = int_formats + float_formats
all_formats = int_formats + float_formats + complex_formats
colour_colourspaces = [pyvips.Interpretation.XYZ,
pyvips.Interpretation.LAB,
pyvips.Interpretation.LCH,
pyvips.Interpretation.CMC,
pyvips.Interpretation.LABS,
pyvips.Interpretation.SCRGB,
pyvips.Interpretation.HSV,
pyvips.Interpretation.SRGB,
pyvips.Interpretation.YXY]
cmyk_colourspaces = [pyvips.Interpretation.CMYK]
coded_colourspaces = [pyvips.Interpretation.LABQ]
mono_colourspaces = [pyvips.Interpretation.B_W]
sixteenbit_colourspaces = [pyvips.Interpretation.GREY16,
pyvips.Interpretation.RGB16]
all_colourspaces = colour_colourspaces + mono_colourspaces + \
coded_colourspaces + sixteenbit_colourspaces + \
cmyk_colourspaces
max_value = {pyvips.BandFormat.UCHAR: 0xff,
pyvips.BandFormat.USHORT: 0xffff,
pyvips.BandFormat.UINT: 0xffffffff,
pyvips.BandFormat.CHAR: 0x7f,
pyvips.BandFormat.SHORT: 0x7fff,
pyvips.BandFormat.INT: 0x7fffffff,
pyvips.BandFormat.FLOAT: 1.0,
pyvips.BandFormat.DOUBLE: 1.0,
pyvips.BandFormat.COMPLEX: 1.0,
pyvips.BandFormat.DPCOMPLEX: 1.0}
sizeof_format = {pyvips.BandFormat.UCHAR: 1,
pyvips.BandFormat.USHORT: 2,
pyvips.BandFormat.UINT: 4,
pyvips.BandFormat.CHAR: 1,
pyvips.BandFormat.SHORT: 2,
pyvips.BandFormat.INT: 4,
pyvips.BandFormat.FLOAT: 4,
pyvips.BandFormat.DOUBLE: 8,
pyvips.BandFormat.COMPLEX: 8,
pyvips.BandFormat.DPCOMPLEX: 16}
rot45_angles = [pyvips.Angle45.D0,
pyvips.Angle45.D45,
pyvips.Angle45.D90,
pyvips.Angle45.D135,
pyvips.Angle45.D180,
pyvips.Angle45.D225,
pyvips.Angle45.D270,
pyvips.Angle45.D315]
rot45_angle_bonds = [pyvips.Angle45.D0,
pyvips.Angle45.D315,
pyvips.Angle45.D270,
pyvips.Angle45.D225,
pyvips.Angle45.D180,
pyvips.Angle45.D135,
pyvips.Angle45.D90,
pyvips.Angle45.D45]
rot_angles = [pyvips.Angle.D0,
pyvips.Angle.D90,
pyvips.Angle.D180,
pyvips.Angle.D270]
rot_angle_bonds = [pyvips.Angle.D0,
pyvips.Angle.D270,
pyvips.Angle.D180,
pyvips.Angle.D90]
# an expanding zip ... if either of the args is a scalar or a one-element list,
# duplicate it down the other side
def zip_expand(x, y):
# handle singleton list case
if isinstance(x, list) and len(x) == 1:
x = x[0]
if isinstance(y, list) and len(y) == 1:
y = y[0]
if isinstance(x, list) and isinstance(y, list):
return list(zip(x, y))
elif isinstance(x, list):
return [[i, y] for i in x]
elif isinstance(y, list):
return [[x, j] for j in y]
else:
return [[x, y]]
# run a 1-ary function on a thing -- loop over elements if the
# thing is a list
def run_fn(fn, x):
if isinstance(x, list):
return [fn(i) for i in x]
else:
return fn(x)
# make a temp filename with the specified suffix and in the
# specified directory
def temp_filename(directory, suffix):
temp_name = next(tempfile._get_candidate_names())
filename = os.path.join(directory, temp_name + suffix)
return filename
# test for an operator exists
def have(name):
return pyvips.type_find("VipsOperation", name) != 0
def skip_if_no(operation_name):
return pytest.mark.skipif(not have(operation_name),
reason='no {}, skipping test'.format(operation_name))
# run a 2-ary function on two things -- loop over elements pairwise if the
# things are lists
def run_fn2(fn, x, y):
if isinstance(x, pyvips.Image) or isinstance(y, pyvips.Image):
return fn(x, y)
elif isinstance(x, list) or isinstance(y, list):
return [fn(i, j) for i, j in zip_expand(x, y)]
else:
return fn(x, y)
# test a pair of things which can be lists for approx. equality
def assert_almost_equal_objects(a, b, threshold=0.0001, msg=''):
# print 'assertAlmostEqualObjects %s = %s' % (a, b)
assert all([pytest.approx(x, abs=threshold) == y
for x, y in zip_expand(a, b)]), msg
# test a pair of things which can be lists for equality
def assert_equal_objects(a, b, msg=''):
# print 'assertEqualObjects %s = %s' % (a, b)
assert all([x == y for x, y in zip_expand(a, b)]), msg
# test a pair of things which can be lists for difference less than a
# threshold
def assert_less_threshold(a, b, diff):
assert all([abs(x - y) < diff for x, y in zip_expand(a, b)])
# run a function on an image and on a single pixel, the results
# should match
def run_cmp(message, im, x, y, fn):
a = im(x, y)
v1 = fn(a)
im2 = fn(im)
v2 = im2(x, y)
assert_almost_equal_objects(v1, v2, msg=message)
# run a function on an image,
# 50,50 and 10,10 should have different values on the test image
def run_image(message, im, fn):
run_cmp(message, im, 50, 50, fn)
run_cmp(message, im, 10, 10, fn)
# run a function on (image, constant), and on (constant, image).
# 50,50 and 10,10 should have different values on the test image
def run_const(message, fn, im, c):
run_cmp(message, im, 50, 50, lambda x: run_fn2(fn, x, c))
run_cmp(message, im, 50, 50, lambda x: run_fn2(fn, c, x))
run_cmp(message, im, 10, 10, lambda x: run_fn2(fn, x, c))
run_cmp(message, im, 10, 10, lambda x: run_fn2(fn, c, x))
# run a function on a pair of images and on a pair of pixels, the results
# should match
def run_cmp2(message, left, right, x, y, fn):
a = left(x, y)
b = right(x, y)
v1 = fn(a, b)
after = fn(left, right)
v2 = after(x, y)
assert_almost_equal_objects(v1, v2, msg=message)
# run a function on a pair of images
# 50,50 and 10,10 should have different values on the test image
def run_image2(message, left, right, fn):
run_cmp2(message, left, right, 50, 50,
lambda x, y: run_fn2(fn, x, y))
run_cmp2(message, left, right, 10, 10,
lambda x, y: run_fn2(fn, x, y))