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import sys
import pytest
from vispy.testing import (requires_application, SkipTest, run_tests_if_main,
assert_raises, IS_CI)
from vispy.app import Canvas, use_app
from vispy.gloo import get_gl_configuration, Program
from vispy.gloo.gl import check_error
@requires_application()
def test_context_properties():
"""Test setting context properties"""
a = use_app()
if a.backend_name.lower() == 'pyglet':
return # cannot set more than once on Pyglet
if a.backend_name.lower() == 'osmesa':
return # cannot set config on OSMesa
if 'pyqt5' in a.backend_name.lower() or 'pyqt6' in a.backend_name.lower() or 'pyside2' in a.backend_name.lower() or 'pyside6' in a.backend_name.lower():
pytest.xfail("Context sharing is not supported in PyQt5, PyQt6, PySide2, or PySide6 at this time.")
# stereo, double buffer won't work on every sys
configs = [dict(samples=4), dict(stencil_size=8),
dict(samples=4, stencil_size=8)]
if a.backend_name.lower() != 'glfw': # glfw *always* double-buffers
configs.append(dict(double_buffer=False, samples=4))
configs.append(dict(double_buffer=False))
else:
assert_raises(RuntimeError, Canvas, app=a,
config=dict(double_buffer=False))
if a.backend_name.lower() == 'sdl2' and IS_CI:
raise SkipTest('Travis SDL cannot set context')
for config in configs:
n_items = len(config)
with Canvas(config=config):
if IS_CI:
# Travis and Appveyor cannot handle obtaining these values
props = config
else:
props = get_gl_configuration()
assert len(config) == n_items
for key, val in config.items():
# XXX knownfail for windows samples, and wx/tkinter (all platforms)
if key == 'samples':
will_fail_backend = a.backend_name.lower() in ('wx', 'tkinter')
if not (sys.platform.startswith('win') or will_fail_backend):
assert val == props[key], key
assert_raises(TypeError, Canvas, config='foo')
assert_raises(KeyError, Canvas, config=dict(foo=True))
assert_raises(TypeError, Canvas, config=dict(double_buffer='foo'))
@requires_application()
def test_context_sharing():
"""Test context sharing"""
with Canvas() as c1:
vert = "attribute vec4 pos;\nvoid main (void) {gl_Position = pos;}"
frag = "void main (void) {gl_FragColor = vec4(1.0, 0.0, 0.0, 1.0);}"
program = Program(vert, frag)
program['pos'] = [(1, 2, 3, 1), (4, 5, 6, 1)]
program.draw('points')
def check():
# Do something to program and see if it worked
program['pos'] = [(1, 2, 3, 1), (4, 5, 6, 1)] # Do command
program.draw('points')
check_error()
# Check while c1 is active
check()
# pyqt5 does not currently support context sharing, pyside6 seg faults on app tests
if 'pyqt5' in c1.app.backend_name.lower() or 'pyqt6' in c1.app.backend_name.lower() or 'pyside2' in c1.app.backend_name.lower() or 'pyside6' in c1.app.backend_name.lower():
pytest.xfail("Context sharing is not supported in PyQt5, PyQt6, PySide2, or PySide6 at this time.")
# Tkinter does not currently support context sharing
if 'tk' in c1.app.backend_name.lower():
pytest.xfail("Context sharing is not supported in Tkinter at this time.")
# Check while c2 is active (with different context)
with Canvas() as c2:
# pyglet always shares
if 'pyglet' not in c2.app.backend_name.lower():
assert_raises(Exception, check)
# Check while c2 is active (with *same* context)
with Canvas(shared=c1.context) as c2:
assert c1.context.shared is c2.context.shared # same object
check()
run_tests_if_main()
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