class ImageTest(unittest.TestCase, UnittestTools):
def setUp(self):
self.data = np.empty(shape=(128, 256, 4), dtype='uint8')
self.data[:, :, 0] = np.arange(256)
self.data[:, :, 1] = np.arange(128)[:, np.newaxis]
self.data[:, :, 2] = np.arange(256)[::-1]
self.data[:, :, 3] = np.arange(128)[::-1, np.newaxis]
self.image_24 = Image(self.data[..., :3])
self.image_32 = Image(self.data)
def test_fromfile_png_rgb(self):
# basic smoke test - assume that kiva.image does the right thing
path = os.path.join(data_dir, 'PngSuite', 'basn2c08.png')
image = Image.from_file(path)
self.assertEqual(image.data.shape, (32, 32, 3))
self.assertEqual(image.format, 'rgb24')
def test_fromfile_png_rgba(self):
# basic smoke test - assume that kiva.image does the right thing
path = os.path.join(data_dir, 'PngSuite', 'basi6a08.png')
image = Image.from_file(path)
self.assertEqual(image.data.shape, (32, 32, 4))
self.assertEqual(image.format, 'rgba32')
def test_init_bad_shape(self):
data = np.zeros(shape=(256, 256), dtype='uint8')
with self.assertRaises(TraitError):
Image(data=data)
def test_init_bad_dtype(self):
data = np.array(['red']*65536).reshape(128, 128, 4)
with self.assertRaises(TraitError):
Image(data=data)
def test_set_bad_shape(self):
data = np.zeros(shape=(256, 256), dtype='uint8')
with self.assertRaises(TraitError):
self.image_32.data = data
def test_set_bad_dtype(self):
data = np.array(['red']*65536).reshape(128, 128, 4)
with self.assertRaises(TraitError):
self.image_32.data = data
def test_format(self):
self.assertEqual(self.image_24.format, 'rgb24')
self.assertEqual(self.image_32.format, 'rgba32')
def test_format_change(self):
image = self.image_24
with self.assertTraitChanges(image, 'format'):
image.data = self.data
self.assertEqual(self.image_24.format, 'rgba32')
def test_bounds_default(self):
self.assertEqual(self.image_24.bounds, [256, 128])
self.assertEqual(self.image_32.bounds, [256, 128])
def test_bounds_overrride(self):
image = Image(self.data, bounds=[200, 100])
self.assertEqual(image.bounds, [200, 100])
def test_size_hint(self):
self.assertEqual(self.image_24.layout_size_hint, (256, 128))
self.assertEqual(self.image_32.layout_size_hint, (256, 128))
def test_size_hint_change(self):
data = np.zeros(shape=(256, 128, 3), dtype='uint8')
image = self.image_24
with self.assertTraitChanges(image, 'layout_size_hint'):
image.data = data
self.assertEqual(self.image_24.layout_size_hint, (128, 256))
def test_image_gc_24(self):
# this is non-contiguous, because data comes from slice
image_gc = self.image_24._image
assert_array_equal(image_gc.bmp_array, self.data[..., :3])
def test_image_gc_32(self):
# this is contiguous
image_gc = self.image_32._image
assert_array_equal(image_gc.bmp_array, self.data)
def test_draw_24(self):
gc = GraphicsContext((256, 128), pix_format='rgb24')
self.image_24.draw(gc)
# if test is failing, uncomment this line to see what is drawn
#gc.save('test_image_draw_24.png')
# smoke test: image isn't all white
assert_array_equal(gc.bmp_array[..., :3], self.data[..., :3])
gc2 = GraphicsContext((256, 128), pix_format='rgba32')
self.image_24.draw(gc2)
assert_array_equal(gc2.bmp_array[..., :3], self.data[..., :3])
def test_draw_32(self):
gc = GraphicsContext((256, 128), pix_format='rgba32')
self.image_32.draw(gc)
# if test is failing, uncommetn this line to see what is drawn
#gc.save('test_image_draw_32.png')
# smoke test: image isn't all white
# XXX actually compute what it should look like with alpha transfer
white_image = np.ones(shape=(256, 128, 4), dtype='uint8')*255
self.assertFalse(np.array_equal(white_image, gc.bmp_array))
def test_draw_stretched(self):
gc = GraphicsContext((256, 256), pix_format='rgba32')
self.image_32.bounds = [128, 258]
self.image_32.position = [128, 0]
self.image_32.draw(gc)
# if test is failing, uncommetn this line to see what is drawn
#gc.save('test_image_draw_stretched.png')
# smoke test: image isn't all white
# XXX actually compute what it should look like with alpha transfer
white_image = np.ones(shape=(256, 256, 4), dtype='uint8')*255
self.assertFalse(np.array_equal(white_image, gc.bmp_array))
# left half of the image *should* be white
assert_array_equal(gc.bmp_array[:, :128, :], white_image[:, :128, :])
class ImageTest(unittest.TestCase, UnittestTools):
def setUp(self):
self.data = np.empty(shape=(128, 256, 4), dtype='uint8')
self.data[:, :, 0] = np.arange(256)
self.data[:, :, 1] = np.arange(128)[:, np.newaxis]
self.data[:, :, 2] = np.arange(256)[::-1]
self.data[:, :, 3] = np.arange(128)[::-1, np.newaxis]
self.image_24 = Image(self.data[..., :3])
self.image_32 = Image(self.data)
def test_fromfile_png_rgb(self):
# basic smoke test - assume that kiva.image does the right thing
path = os.path.join(data_dir, 'PngSuite', 'basn2c08.png')
image = Image.from_file(path)
self.assertEqual(image.data.shape, (32, 32, 3))
self.assertEqual(image.format, 'rgb24')
def test_fromfile_png_rgba(self):
# basic smoke test - assume that kiva.image does the right thing
path = os.path.join(data_dir, 'PngSuite', 'basi6a08.png')
image = Image.from_file(path)
self.assertEqual(image.data.shape, (32, 32, 4))
self.assertEqual(image.format, 'rgba32')
def test_init_bad_shape(self):
data = np.zeros(shape=(256, 256), dtype='uint8')
with self.assertRaises(TraitError):
Image(data=data)
def test_init_bad_dtype(self):
data = np.array(['red'] * 65536).reshape(128, 128, 4)
with self.assertRaises(TraitError):
Image(data=data)
def test_set_bad_shape(self):
data = np.zeros(shape=(256, 256), dtype='uint8')
with self.assertRaises(TraitError):
self.image_32.data = data
def test_set_bad_dtype(self):
data = np.array(['red'] * 65536).reshape(128, 128, 4)
with self.assertRaises(TraitError):
self.image_32.data = data
def test_format(self):
self.assertEqual(self.image_24.format, 'rgb24')
self.assertEqual(self.image_32.format, 'rgba32')
def test_format_change(self):
image = self.image_24
with self.assertTraitChanges(image, 'format'):
image.data = self.data
self.assertEqual(self.image_24.format, 'rgba32')
def test_bounds_default(self):
self.assertEqual(self.image_24.bounds, [256, 128])
self.assertEqual(self.image_32.bounds, [256, 128])
def test_bounds_overrride(self):
image = Image(self.data, bounds=[200, 100])
self.assertEqual(image.bounds, [200, 100])
def test_size_hint(self):
self.assertEqual(self.image_24.layout_size_hint, (256, 128))
self.assertEqual(self.image_32.layout_size_hint, (256, 128))
def test_size_hint_change(self):
data = np.zeros(shape=(256, 128, 3), dtype='uint8')
image = self.image_24
with self.assertTraitChanges(image, 'layout_size_hint'):
image.data = data
self.assertEqual(self.image_24.layout_size_hint, (128, 256))
def test_image_gc_24(self):
# this is non-contiguous, because data comes from slice
image_gc = self.image_24._image
assert_array_equal(image_gc.bmp_array, self.data[..., :3])
def test_image_gc_32(self):
# this is contiguous
image_gc = self.image_32._image
assert_array_equal(image_gc.bmp_array, self.data)
def test_draw_24(self):
gc = GraphicsContext((256, 128), pix_format='rgb24')
self.image_24.draw(gc)
# if test is failing, uncomment this line to see what is drawn
#gc.save('test_image_draw_24.png')
# smoke test: image isn't all white
assert_array_equal(gc.bmp_array[..., :3], self.data[..., :3])
gc2 = GraphicsContext((256, 128), pix_format='rgba32')
self.image_24.draw(gc2)
assert_array_equal(gc2.bmp_array[..., :3], self.data[..., :3])
def test_draw_32(self):
gc = GraphicsContext((256, 128), pix_format='rgba32')
self.image_32.draw(gc)
# if test is failing, uncommetn this line to see what is drawn
#gc.save('test_image_draw_32.png')
# smoke test: image isn't all white
# XXX actually compute what it should look like with alpha transfer
white_image = np.ones(shape=(256, 128, 4), dtype='uint8') * 255
self.assertFalse(np.array_equal(white_image, gc.bmp_array))
def test_draw_stretched(self):
gc = GraphicsContext((256, 256), pix_format='rgba32')
self.image_32.bounds = [128, 258]
self.image_32.position = [128, 0]
self.image_32.draw(gc)
# if test is failing, uncommetn this line to see what is drawn
#gc.save('test_image_draw_stretched.png')
# smoke test: image isn't all white
# XXX actually compute what it should look like with alpha transfer
white_image = np.ones(shape=(256, 256, 4), dtype='uint8') * 255
self.assertFalse(np.array_equal(white_image, gc.bmp_array))
# left half of the image *should* be white
assert_array_equal(gc.bmp_array[:, :128, :], white_image[:, :128, :])
