def _nvidia_shader_workaround(self) -> None:
"""Work around QOpenGLShaderProgram issues.
See https://bugs.launchpad.net/ubuntu/+source/python-qt4/+bug/941826
"""
self._assert_backend(usertypes.Backend.QtWebEngine)
utils.libgl_workaround()
def apply_libgl_workaround():
"""Make sure we load libGL early so QtWebEngine tests run properly."""
utils.libgl_workaround()
def opengl_info() -> Optional[OpenGLInfo]: # pragma: no cover
"""Get the OpenGL vendor used.
This returns a string such as 'nouveau' or
'Intel Open Source Technology Center'; or None if the vendor can't be
determined.
"""
assert QApplication.instance()
# Some setups can segfault in here if we don't do this.
utils.libgl_workaround()
override = os.environ.get('QUTE_FAKE_OPENGL')
if override is not None:
log.init.debug("Using override {}".format(override))
vendor, version = override.split(', ', maxsplit=1)
return OpenGLInfo.parse(vendor=vendor, version=version)
old_context = cast(Optional[QOpenGLContext], QOpenGLContext.currentContext())
old_surface = None if old_context is None else old_context.surface()
surface = QOffscreenSurface()
surface.create()
ctx = QOpenGLContext()
ok = ctx.create()
if not ok:
log.init.debug("Creating context failed!")
return None
ok = ctx.makeCurrent(surface)
if not ok:
log.init.debug("Making context current failed!")
return None
try:
if ctx.isOpenGLES():
# Can't use versionFunctions there
return OpenGLInfo(gles=True)
vp = QOpenGLVersionProfile()
vp.setVersion(2, 0)
try:
vf = ctx.versionFunctions(vp)
except ImportError as e:
log.init.debug("Importing version functions failed: {}".format(e))
return None
if vf is None:
log.init.debug("Getting version functions failed!")
return None
vendor = vf.glGetString(vf.GL_VENDOR)
version = vf.glGetString(vf.GL_VERSION)
return OpenGLInfo.parse(vendor=vendor, version=version)
finally:
ctx.doneCurrent()
if old_context and old_surface:
old_context.makeCurrent(old_surface)
