def test_set_lum():
im1 = util.fill((1, 1), [0, 128, 255])
im2 = util.fill((1, 1), [128, 128, 128])
r1, g1, b1 = im1.split()
r2, g2, b2 = im2.split()
c1 = '(float(r1), float(g1), float(b1))'
c2 = '(float(r2), float(g2), float(b2))'
bands = ImageMath.eval('set_lum({}, lum({}))'.format(c1, c2),
set_lum=set_lum,
lum=lum,
r1=r1,
g1=g1,
b1=b1,
r2=r2,
b2=b2,
g2=g2)
expected1 = [
[pytest.approx(41.13881001122631, 1e-6)],
[pytest.approx(148.48874067225782, 1e-6)],
[255],
]
assert [list(band.im.getdata()) for band in bands] == expected1
im_set_lum = Image.merge('RGB', [_convert(band, 'L').im for band in bands])
expected2 = [(floor(41.13881001122631), floor(148.48874067225782), 255)]
assert list(im_set_lum.getdata()) == expected2
def linear_gradient(size, start, end, is_horizontal=True):
"""Creates linear gradient image.
Arguments:
size: A tuple/list of 2 integers. The size of output image.
start: A tuple/list of 3 integers. The starting point color.
The point is left-side when `is_horizontal` is True, top otherwise.
end: A tuple/list of 3 integers. The ending point color.
The point is right-side when `is_horizontal` is True,
the bottom otherwise.
is_horizontal: An optional boolean. The direction of gradient line.
Left to right if True, top to bottom else.
Returns:
The output image.
Raises:
AssertionError: if `size`, `start` and/or `end` have invalid size.
"""
assert len(size) == 2
assert len(start) == 3
assert len(end) == 3
im_start = fill(size, start)
im_end = fill(size, end)
mask = linear_gradient_mask(size, is_horizontal=is_horizontal)
return Image.composite(im_start, im_end, mask)
def mayfair(im):
"""Applies Mayfair filter.
Arguments:
im: An input image.
Returns:
The output image.
"""
cb = util.or_convert(im, 'RGB')
size = cb.size
pos = (.4, .4)
cs1 = util.fill(size, [255, 255, 255, .8])
cm1 = css.blending.overlay(cb, cs1)
cs2 = util.fill(size, [255, 200, 200, .6])
cm2 = css.blending.overlay(cb, cs2)
cs3 = util.fill(size, [17, 17, 17])
cm3 = css.blending.overlay(cb, cs3)
mask1 = util.radial_gradient_mask(size, scale=.3, center=pos)
cs = Image.composite(cm1, cm2, mask1)
mask2 = util.radial_gradient_mask(size, length=.3, scale=.6, center=pos)
cs = Image.composite(cs, cm3, mask2)
cr = Image.blend(cb, cs, .4) # opacity
cr = css.contrast(cr, 1.1)
cr = css.saturate(cr, 1.1)
return cr
def test_alpha_blend_normal_opaque_backdrop_with_transparent_source():
cb = util.fill((2, 2), [0, 128, 255, 1])
cs = util.fill((2, 2), [255, 128, 0, 0])
cr = alpha_blend(cb, cs, _normal)
expected = split_alpha(cb)[0]
assert cr == expected
def brooklyn(im):
"""Applies Brooklyn filter.
Arguments:
im: An input image.
Returns:
The output image.
"""
cb = util.or_convert(im, 'RGB')
cs1 = util.fill(cb.size, [168, 223, 193, .4])
cm1 = css.blending.overlay(cb, cs1)
cs2 = util.fill(cb.size, [196, 183, 200])
cm2 = css.blending.overlay(cb, cs2)
gradient_mask = util.radial_gradient_mask(cb.size, length=.7)
cr = Image.composite(cm1, cm2, gradient_mask)
cr = css.contrast(cr, .9)
cr = css.brightness(cr, 1.1)
return cr
def xpro2(im):
"""Applies X-pro II filter.
Arguments:
im: An input image.
Returns:
The output image.
"""
cb = util.or_convert(im, 'RGB')
cs1 = util.fill(cb.size, [230, 231, 224])
cs2 = util.fill(cb.size, [43, 42, 161])
cs2 = Image.blend(cb, cs2, .6)
gradient_mask = util.radial_gradient_mask(cb.size, length=.4, scale=1.1)
cs = Image.composite(cs1, cs2, gradient_mask)
# TODO: improve alpha blending
cm1 = css.blending.color_burn(cb, cs)
cm2 = cm1.copy()
cm2 = Image.blend(cb, cm2, .6)
cr = Image.composite(cm1, cm2, gradient_mask)
cr = css.sepia(cr, .3)
return cr
def test_screen():
cb = util.fill((2, 2), [255, 128, 0])
cs = util.fill((2, 2), [0, 128, 255])
actual = css.blending.screen(cb, cs)
expected = ImageChops.screen(cb, cs)
assert actual == expected
def nashville(im):
"""Applies Nashville filter.
Arguments:
im: An input image.
Returns:
The output image.
"""
cb = util.or_convert(im, 'RGB')
cs1 = util.fill(cb.size, [247, 176, 153])
cm1 = ImageChops.darker(cb, cs1)
cm1 = Image.blend(cb, cm1, .56)
cs2 = util.fill(cb.size, [0, 70, 150])
cm2 = ImageChops.lighter(cm1, cs2)
cr = Image.blend(cm1, cm2, .4)
cr = css.sepia(cr, .2)
cr = css.contrast(cr, 1.2)
cr = css.brightness(cr, 1.05)
cr = css.saturate(cr, 1.2)
return cr
def test_overlay2():
cb = util.fill((2, 2), [0, 128, 255])
cs = util.fill((2, 2), [255, 128, 0])
actual = css.blending.overlay(cb, cs)
expected = css.blending.hard_light(cs, cb)
assert actual == expected
def test_subtract2():
im1 = util.fill((2, 2), [0, 127, 255])
im2 = util.fill((2, 2), [255, 127, 0])
actual = util.subtract(im1, im2)
expected = ImageChops.subtract(im1, im2)
assert actual == expected
def test_difference():
cb = util.fill((2, 2), [255, 128, 0])
cs = util.fill((2, 2), [0, 128, 255])
actual = css.blending.difference(cb, cs)
expected = ImageChops.difference(cb, cs)
assert actual == expected
def rise(im):
"""Applies Rise filter.
Arguments:
im: An input image.
Returns:
The output image.
"""
cb = util.or_convert(im, 'RGB')
cs1 = util.fill(cb.size, [236, 205, 169, .15])
cm1 = css.blending.multiply(cb, cs1)
cs2 = util.fill(cb.size, [50, 30, 7, .4])
cm2 = css.blending.multiply(cb, cs2)
gradient_mask1 = util.radial_gradient_mask(cb.size, length=.55)
cm = Image.composite(cm1, cm2, gradient_mask1)
cs3 = util.fill(cb.size, [232, 197, 152, .8])
cm3 = css.blending.overlay(cm, cs3)
gradient_mask2 = util.radial_gradient_mask(cb.size, scale=.9)
cm_ = Image.composite(cm3, cm, gradient_mask2)
cr = Image.blend(cm, cm_, .6) # opacity
cr = css.brightness(cr, 1.05)
cr = css.sepia(cr, .2)
cr = css.contrast(cr, .9)
cr = css.saturate(cr, .9)
return cr
def test_add2():
im1 = util.fill((2, 2), [0, 127, 255])
im2 = util.fill((2, 2), [0, 127, 255])
actual = util.add(im1, im2)
expected = ImageChops.add(im1, im2)
assert actual == expected
def test_add():
im1 = util.fill((2, 2), [0, 127, 255])
im2 = util.fill((2, 2), [0, 127, 255])
actual = util.add(im1, im2)
expected = util.fill((2, 2), [0, 254, 255])
assert actual == expected
def test_normal():
cb = util.fill((2, 2), [255, 128, 0])
cs = util.fill((2, 2), [0, 128, 255])
actual = css.blending.normal(cb, cs)
expected = cs
assert actual == expected
def test_alpha_blend_normal_rgb_with_opaque_source():
cb = util.fill((2, 2), [0, 128, 255])
cs = util.fill((2, 2), [255, 128, 0, 1])
cr = alpha_blend(cb, cs, _normal)
expected = split_alpha(cs)[0]
assert cr == expected
def test_contrast_0():
im = util.fill((4, 4), [174, 56, 3])
im2 = util.fill((4, 4), [128] * 3)
contrasted_im = css.contrast(im, 0)
assert list(contrasted_im.getdata()) == list(im2.getdata())
assert contrasted_im.size == im.size
assert contrasted_im.mode == im.mode
def test_brightness_0():
im = util.fill((4, 4), [174, 56, 3])
black = util.fill((4, 4), [0] * 3)
im_b = css.brightness(im, 0)
assert list(im_b.getdata()) == list(black.getdata())
assert im_b.size == im.size
assert im_b.mode == im.mode
def test_alpha_blend_call_blending(mocker):
cb = util.fill((2, 2), [0, 128, 255, 1])
cs = util.fill((2, 2), [255, 128, 0, 1])
return_value, _ = split_alpha(cs)
normal_stub = mocker.Mock(return_value=return_value)
alpha_blend(cb, cs, normal_stub)
# TODO: assert with parameters
normal_stub.assert_called_once()
def test_sepia_0():
im = util.fill((4, 4), [174, 56, 3])
sepiaed_im = css.sepia(im, 0)
assert list(sepiaed_im.getdata()) == list(im.getdata())
assert sepiaed_im.size == im.size
assert sepiaed_im.mode == im.mode
def test_grayscale_0():
im = util.fill((4, 4), [174, 56, 3])
grayscaled_im = css.grayscale(im, 0)
assert list(grayscaled_im.getdata()) == list(im.getdata())
assert grayscaled_im.size == im.size
assert grayscaled_im.mode == im.mode
def test_hue_rotate():
im = util.fill((4, 4), [174, 56, 3])
hue_rotated_im = css.hue_rotate(im)
assert list(hue_rotated_im.getdata()) == list(im.getdata())
assert hue_rotated_im.size == im.size
assert hue_rotated_im.mode == im.mode
def test_brightness():
im = util.fill((4, 4), [174, 56, 3])
im_b = css.brightness(im)
assert list(im_b.getdata()) == list(im.getdata())
assert im_b.size == im.size
assert im_b.mode == im.mode
def test_fill_alpha():
w, h = (4, 4)
im = util.fill((w, h), [0, 127, 255, .5])
assert list(im.getdata()) == [(0, 127, 255, 128)] * (w * h)
assert im.size == (w, h)
assert im.mode == 'RGBA'
def test_or_convert_different_mode():
w, h = (4, 4)
im = util.fill((w, h), [0, 127, 255, .5]) # RGBA
converted = util.or_convert(im, 'RGB')
assert converted != im
assert converted.mode == 'RGB'
def test_or_convert_same_mode():
w, h = (4, 4)
im = util.fill((w, h), [0, 127, 255]) # RGB
converted = util.or_convert(im, 'RGB')
assert converted == im # should be the same instance
assert converted.mode == 'RGB'
def test_contrast_greater_than_1():
im = util.fill((4, 4), [174, 56, 3])
contrasted_im = css.contrast(im, 2)
contrasted_im2 = css.contrast(im, 1)
assert list(contrasted_im.getdata()) != list(contrasted_im2.getdata())
assert contrasted_im.size == im.size
assert contrasted_im.mode == im.mode
def test_grayscale_greater_than_1():
im = util.fill((4, 4), [174, 56, 3])
grayscaled_im = css.grayscale(im, 2)
grayscaleed_im2 = css.grayscale(im, 1)
assert list(grayscaled_im.getdata()) == list(grayscaleed_im2.getdata())
assert grayscaled_im.size == im.size
assert grayscaled_im.mode == im.mode
def test_sepia_greater_than_1():
im = util.fill((4, 4), [174, 56, 3])
sepiaed_im = css.sepia(im, 2)
sepiaed_im2 = css.sepia(im, 1)
assert list(sepiaed_im.getdata()) == list(sepiaed_im2.getdata())
assert sepiaed_im.size == im.size
assert sepiaed_im.mode == im.mode
def test_hue_rotate_less_than_0():
im = util.fill((4, 4), [174, 56, 3])
hue_rotated_im = css.hue_rotate(im, -42)
hue_rotated_im2 = css.hue_rotate(im)
assert list(hue_rotated_im.getdata()) != list(hue_rotated_im2.getdata())
assert hue_rotated_im.size == im.size
assert hue_rotated_im.mode == im.mode
