Merge pull request #369 from campagnola/imageitem-tests

Imageitem tests
This commit is contained in:
Luke Campagnola 2016-08-27 17:26:43 -07:00 committed by GitHub
commit e84af46380
4 changed files with 118 additions and 15 deletions

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@ -300,8 +300,11 @@ class ImageItem(GraphicsObject):
y = self.mapToDevice(QtCore.QPointF(0,1))
w = Point(x-o).length()
h = Point(y-o).length()
xds = int(1/max(1, w))
yds = int(1/max(1, h))
if w == 0 or h == 0:
self.qimage = None
return
xds = int(1.0/w)
yds = int(1.0/h)
image = fn.downsample(self.image, xds, axis=0)
image = fn.downsample(image, yds, axis=1)
else:

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@ -1,17 +1,113 @@
import gc
import weakref
import time
import pytest
# try:
# import faulthandler
# faulthandler.enable()
# except ImportError:
# pass
from pyqtgraph.Qt import QtCore, QtGui, QtTest
import numpy as np
import pyqtgraph as pg
from pyqtgraph.tests import assertImageApproved
app = pg.mkQApp()
def test_ImageItem():
w = pg.GraphicsWindow()
view = pg.ViewBox()
w.setCentralWidget(view)
w.resize(200, 200)
w.show()
img = pg.ImageItem(border=0.5)
view.addItem(img)
# test mono float
np.random.seed(0)
data = np.random.normal(size=(20, 20))
dmax = data.max()
data[:10, 1] = dmax + 10
data[1, :10] = dmax + 12
data[3, :10] = dmax + 13
img.setImage(data)
QtTest.QTest.qWaitForWindowShown(w)
time.sleep(0.1)
app.processEvents()
assertImageApproved(w, 'imageitem/init', 'Init image item. View is auto-scaled, image axis 0 marked by 1 line, axis 1 is marked by 2 lines. Origin in bottom-left.')
# ..with colormap
cmap = pg.ColorMap([0, 0.25, 0.75, 1], [[0, 0, 0, 255], [255, 0, 0, 255], [255, 255, 0, 255], [255, 255, 255, 255]])
img.setLookupTable(cmap.getLookupTable())
assertImageApproved(w, 'imageitem/lut', 'Set image LUT.')
# ..and different levels
img.setLevels([dmax+9, dmax+13])
assertImageApproved(w, 'imageitem/levels1', 'Levels show only axis lines.')
img.setLookupTable(None)
# test mono int
data = np.fromfunction(lambda x,y: x+y*10, (129, 128)).astype(np.int16)
img.setImage(data)
assertImageApproved(w, 'imageitem/gradient_mono_int', 'Mono int gradient.')
img.setLevels([640, 641])
assertImageApproved(w, 'imageitem/gradient_mono_int_levels', 'Mono int gradient w/ levels to isolate diagonal.')
# test mono byte
data = np.fromfunction(lambda x,y: x+y, (129, 128)).astype(np.ubyte)
img.setImage(data)
assertImageApproved(w, 'imageitem/gradient_mono_byte', 'Mono byte gradient.')
img.setLevels([127, 128])
assertImageApproved(w, 'imageitem/gradient_mono_byte_levels', 'Mono byte gradient w/ levels to isolate diagonal.')
# test RGBA byte
data = np.zeros((100, 100, 4), dtype='ubyte')
data[..., 0] = np.linspace(0, 255, 100).reshape(100, 1)
data[..., 1] = np.linspace(0, 255, 100).reshape(1, 100)
data[..., 3] = 255
img.setImage(data)
assertImageApproved(w, 'imageitem/gradient_rgba_byte', 'RGBA byte gradient.')
img.setLevels([[128, 129], [128, 255], [0, 1], [0, 255]])
assertImageApproved(w, 'imageitem/gradient_rgba_byte_levels', 'RGBA byte gradient. Levels set to show x=128 and y>128.')
# test RGBA float
data = data.astype(float)
img.setImage(data / 1e9)
assertImageApproved(w, 'imageitem/gradient_rgba_float', 'RGBA float gradient.')
# checkerboard to test alpha
img2 = pg.ImageItem()
img2.setImage(np.fromfunction(lambda x,y: (x+y)%2, (10, 10)), levels=[-1,2])
view.addItem(img2)
img2.scale(10, 10)
img2.setZValue(-10)
data[..., 0] *= 1e-9
data[..., 1] *= 1e9
data[..., 3] = np.fromfunction(lambda x,y: np.sin(0.1 * (x+y)), (100, 100))
img.setImage(data, levels=[[0, 128e-9],[0, 128e9],[0, 1],[-1, 1]])
assertImageApproved(w, 'imageitem/gradient_rgba_float_alpha', 'RGBA float gradient with alpha.')
# test composition mode
img.setCompositionMode(QtGui.QPainter.CompositionMode_Plus)
assertImageApproved(w, 'imageitem/gradient_rgba_float_additive', 'RGBA float gradient with alpha and additive composition mode.')
img2.hide()
img.setCompositionMode(QtGui.QPainter.CompositionMode_SourceOver)
# test downsampling
data = np.fromfunction(lambda x,y: np.cos(0.002 * x**2), (800, 100))
img.setImage(data, levels=[-1, 1])
assertImageApproved(w, 'imageitem/resolution_without_downsampling', 'Resolution test without downsampling.')
img.setAutoDownsample(True)
assertImageApproved(w, 'imageitem/resolution_with_downsampling_x', 'Resolution test with downsampling axross x axis.')
img.setImage(data.T, levels=[-1, 1])
assertImageApproved(w, 'imageitem/resolution_with_downsampling_y', 'Resolution test with downsampling across y axis.')
@pytest.mark.skipif(pg.Qt.USE_PYSIDE, reason="pyside does not have qWait")
def test_dividebyzero():
import pyqtgraph as pg

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@ -1,15 +1,15 @@
import pyqtgraph as pg
import numpy as np
app = pg.mkQApp()
plot = pg.plot()
app.processEvents()
# set view range equal to its bounding rect.
# This causes plots to look the same regardless of pxMode.
plot.setRange(rect=plot.boundingRect())
def test_scatterplotitem():
plot = pg.PlotWidget()
# set view range equal to its bounding rect.
# This causes plots to look the same regardless of pxMode.
plot.setRange(rect=plot.boundingRect())
for i, pxMode in enumerate([True, False]):
for j, useCache in enumerate([True, False]):
s = pg.ScatterPlotItem()
@ -54,6 +54,10 @@ def test_scatterplotitem():
def test_init_spots():
plot = pg.PlotWidget()
# set view range equal to its bounding rect.
# This causes plots to look the same regardless of pxMode.
plot.setRange(rect=plot.boundingRect())
spots = [
{'x': 0, 'y': 1},
{'pos': (1, 2), 'pen': None, 'brush': None, 'data': 'zzz'},

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@ -42,7 +42,7 @@ Procedure for unit-testing with images:
# pyqtgraph should be tested against. When adding or changing test images,
# create and push a new tag and update this variable. To test locally, begin
# by creating the tag in your ~/.pyqtgraph/test-data repository.
testDataTag = 'test-data-4'
testDataTag = 'test-data-5'
import time