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import numpy as np
import pytest
from vispy.testing import run_tests_if_main
from vispy.visuals._scalable_textures import (
get_default_clim_from_dtype,
get_default_clim_from_data,
CPUScaledTextureMixin,
GPUScaledTextureMixin,
)
class Stub:
_ndim = 2
def __init__(self, data, **kwargs):
pass
def set_data(self, data, *args, **kwargs):
self._data = data
class CPUScaledStub(CPUScaledTextureMixin, Stub):
pass
class GPUScaledStub(GPUScaledTextureMixin, Stub):
internalformat = "r32f"
def _get_texture_format_for_data(self, data, internalformat=None):
return None
def test_default_clim():
ref_data = np.array([10, 5, 15, 25, 15])
# f32
data = ref_data.astype(np.float32)
clim = get_default_clim_from_dtype(data.dtype)
assert clim == (0, 1)
clim = get_default_clim_from_data(data)
assert clim == (5, 25)
# i32
data = ref_data.astype(np.int32)
clim = get_default_clim_from_dtype(data.dtype)
assert clim == (-2**31, 2**31 - 1)
clim = get_default_clim_from_data(data)
assert clim == (5, 25)
# u8
data = ref_data.astype(np.uint8)
clim = get_default_clim_from_dtype(data.dtype)
assert clim == (0, 255)
clim = get_default_clim_from_data(data)
assert clim == (5, 25)
def test_default_clim_non_finite():
data = np.array([10, np.nan, 5, 15, 25, 15]).astype(np.float32)
clim = get_default_clim_from_dtype(data.dtype)
assert clim == (0, 1)
clim = get_default_clim_from_data(data)
assert clim == (5, 25)
data = np.array([10, np.inf, 5, 15, 25, 15]).astype(np.float32)
clim = get_default_clim_from_dtype(data.dtype)
assert clim == (0, 1)
clim = get_default_clim_from_data(data)
assert clim == (5, 25)
data = np.array([10, -np.inf, 5, 15, 25, 15]).astype(np.float32)
clim = get_default_clim_from_dtype(data.dtype)
assert clim == (0, 1)
clim = get_default_clim_from_data(data)
assert clim == (5, 25)
data = np.array([np.nan, np.nan, np.nan]).astype(np.float32)
clim = get_default_clim_from_dtype(data.dtype)
assert clim == (0, 1)
clim = get_default_clim_from_data(data)
assert clim == (0, 0)
data = np.array([np.nan, np.inf, -np.inf]).astype(np.float32)
clim = get_default_clim_from_dtype(data.dtype)
assert clim == (0, 1)
clim = get_default_clim_from_data(data)
assert clim == (0, 0)
def test_clim_handling_cpu():
ref_data = np.array([[10, 10, 5], [15, 25, 15]])
# f32 - auto clim
st = CPUScaledStub()
st.set_clim("auto")
st.scale_and_set_data(ref_data.astype(np.float32))
assert st.clim == (5, 25)
assert st.clim_normalized == (0, 1)
assert np.all(st._data == (ref_data - 5) / 20)
# Updating clim keeps data the same if not changing too much
st.set_clim((0, 20))
assert st.clim == (0, 20)
assert st.clim_normalized == (-0.25, 0.75)
assert np.all(st._data == (ref_data - 5) / 20)
# f32 - custom clim
st = CPUScaledStub()
st.set_clim((0, 20))
st.scale_and_set_data(ref_data.astype(np.float32))
assert st.clim == (0, 20)
assert st.clim_normalized == (0, 1)
assert np.all(st._data == ref_data / 20)
# f32 - flat clim
st = CPUScaledStub()
st.set_clim((10, 10))
st.scale_and_set_data(ref_data.astype(np.float32))
assert st.clim == (10, 10)
assert st.clim_normalized == (0, np.inf)
# assert np.min(st._data) == 0 - does not matter
# f32 - auto clim
st = CPUScaledStub()
st.set_clim("auto")
assert st.clim == "auto"
pytest.raises(RuntimeError, getattr, st, "clim_normalized")
st.scale_and_set_data(ref_data.astype(np.float32))
assert st.clim == (5, 25)
assert st.clim_normalized == (0, 1)
def test_clim_handling_gpu():
ref_data = np.array([[10, 10, 5], [15, 25, 15]])
# f32 - auto clim
st = GPUScaledStub()
st.set_clim("auto")
st.scale_and_set_data(ref_data.astype(np.float32))
assert st.clim == (5, 25)
assert st.clim_normalized == (5, 25)
assert np.all(st._data == ref_data)
# Updating clim keeps data the same if not changing too much
st.set_clim((0, 20))
assert st.clim == (0, 20)
assert st.clim_normalized == (0, 20)
assert np.all(st._data == ref_data)
# f32 - custom clim
st = GPUScaledStub()
st.set_clim((0, 20))
st.scale_and_set_data(ref_data.astype(np.float32))
assert st.clim == (0, 20)
assert st.clim_normalized == (0, 20)
assert np.all(st._data == ref_data)
# f32 - flat clim
st = GPUScaledStub()
st.set_clim((10, 10))
st.scale_and_set_data(ref_data.astype(np.float32))
assert st.clim == (10, 10)
assert st.clim_normalized == (10, np.inf)
# assert np.min(st._data) == 0 - does not matter
# f32 - auto clim
st = GPUScaledStub()
st.set_clim("auto")
assert st.clim == "auto"
pytest.raises(RuntimeError, getattr, st, "clim_normalized")
st.scale_and_set_data(ref_data.astype(np.float32))
assert st.clim == (5.0, 25.0)
assert st.clim_normalized == (5.0, 25.0)
run_tests_if_main()
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