# ----------------------------------------------------------------------------
# pyglet
# Copyright (c) 2006-2008 Alex Holkner
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in
# the documentation and/or other materials provided with the
# distribution.
# * Neither the name of pyglet nor the names of its
# contributors may be used to endorse or promote products
# derived from this software without specific prior written
# permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
# ----------------------------------------------------------------------------
'''Information about version and extensions of current GLX implementation.
Usage::
from pyglet.gl import glx_info
if glx_info.have_extension('GLX_NV_float_buffer'):
# ...
Or, if using more than one display::
from pyglet.gl.glx_info import GLXInfo
info = GLXInfo(window._display)
if info.get_server_vendor() == 'ATI':
# ...
'''
__docformat__ = 'restructuredtext'
__version__ = '$Id: glx_info.py 1579 2008-01-15 14:47:19Z Alex.Holkner $'
from ctypes import *
from pyglet.gl.glx import *
from pyglet.gl.glx import Display
class GLXInfoException(Exception):
pass
class GLXInfo(object):
def __init__(self, display=None):
self.display = display
def set_display(self, display):
self.display = cast(pointer(display), POINTER(Display))
def check_display(self):
if not self.display:
raise GLXInfoException('No X11 display has been set yet.')
def have_version(self, major, minor=0):
self.check_display()
if not glXQueryExtension(self.display, None, None):
raise GLXInfoException('pyglet requires an X server with GLX')
server_version = self.get_server_version().split()[0]
client_version = self.get_client_version().split()[0]
server = [int(i) for i in server_version.split('.')]
client = [int(i) for i in client_version.split('.')]
return (tuple(server) >= (major, minor) and
tuple(client) >= (major, minor))
def get_server_vendor(self):
self.check_display()
return glXQueryServerString(self.display, 0, GLX_VENDOR)
def get_server_version(self):
# glXQueryServerString was introduced in GLX 1.1, so we need to use the
# 1.0 function here which queries the server implementation for its
# version.
self.check_display()
major = c_int()
minor = c_int()
if not glXQueryVersion(self.display, byref(major), byref(minor)):
raise GLXInfoException('Could not determine GLX server version')
return '%s.%s'%(major.value, minor.value)
def get_server_extensions(self):
self.check_display()
return glXQueryServerString(self.display, 0, GLX_EXTENSIONS).split()
def get_client_vendor(self):
self.check_display()
return glXGetClientString(self.display, GLX_VENDOR)
def get_client_version(self):
self.check_display()
return glXGetClientString(self.display, GLX_VERSION)
def get_client_extensions(self):
self.check_display()
return glXGetClientString(self.display, GLX_EXTENSIONS).split()
def get_extensions(self):
self.check_display()
return glXQueryExtensionsString(self.display, 0).split()
def have_extension(self, extension):
self.check_display()
if not self.have_version(1, 1):
return False
return extension in self.get_extensions()
# Single instance suitable for apps that use only a single display.
_glx_info = GLXInfo()
set_display = _glx_info.set_display
check_display = _glx_info.check_display
have_version = _glx_info.have_version
get_server_vendor = _glx_info.get_server_vendor
get_server_version = _glx_info.get_server_version
get_server_extensions = _glx_info.get_server_extensions
get_client_vendor = _glx_info.get_client_vendor
get_client_version = _glx_info.get_client_version
get_client_extensions = _glx_info.get_client_extensions
get_extensions = _glx_info.get_extensions
have_extension = _glx_info.have_extension
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