196 lines
6.5 KiB
Python
196 lines
6.5 KiB
Python
# ----------------------------------------------------------------------------
|
|
# 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 GL implementation.
|
|
|
|
Usage::
|
|
|
|
from pyglet.gl import gl_info
|
|
|
|
if gl_info.have_extension('GL_NV_register_combiners'):
|
|
# ...
|
|
|
|
If you are using more than one context, you can set up a separate GLInfo
|
|
object for each context. Call `set_active_context` after switching to the
|
|
context::
|
|
|
|
from pyglet.gl.gl_info import GLInfo
|
|
|
|
info = GLInfo()
|
|
info.set_active_context()
|
|
|
|
if info.have_version(2, 1):
|
|
# ...
|
|
|
|
'''
|
|
|
|
__docformat__ = 'restructuredtext'
|
|
__version__ = '$Id: $'
|
|
|
|
from ctypes import *
|
|
import warnings
|
|
|
|
from pyglet.gl.gl import *
|
|
|
|
class GLInfo(object):
|
|
'''Information interface for a single GL context.
|
|
|
|
A default instance is created automatically when the first OpenGL context
|
|
is created. You can use the module functions as a convenience for
|
|
this default instance's methods.
|
|
|
|
If you are using more than one context, you must call `set_active_context`
|
|
when the context is active for this `GLInfo` instance.
|
|
'''
|
|
have_context = False
|
|
version = '0.0.0'
|
|
vendor = ''
|
|
renderer = ''
|
|
extensions = set()
|
|
|
|
_have_info = False
|
|
|
|
def set_active_context(self):
|
|
'''Store information for the currently active context.
|
|
|
|
This method is called automatically for the default context.
|
|
'''
|
|
self.have_context = True
|
|
if not self._have_info:
|
|
self.vendor = cast(glGetString(GL_VENDOR), c_char_p).value
|
|
self.renderer = cast(glGetString(GL_RENDERER), c_char_p).value
|
|
self.extensions = cast(glGetString(GL_EXTENSIONS), c_char_p).value
|
|
if self.extensions:
|
|
self.extensions = set(self.extensions.split())
|
|
self.version = cast(glGetString(GL_VERSION), c_char_p).value
|
|
self._have_info = True
|
|
|
|
def remove_active_context(self):
|
|
self.have_context = False
|
|
|
|
def have_extension(self, extension):
|
|
'''Determine if an OpenGL extension is available.
|
|
|
|
:Parameters:
|
|
`extension` : str
|
|
The name of the extension to test for, including its
|
|
``GL_`` prefix.
|
|
|
|
:return: True if the extension is provided by the driver.
|
|
:rtype: bool
|
|
'''
|
|
if not self.have_context:
|
|
warnings.warn('No GL context created yet.')
|
|
return extension in self.extensions
|
|
|
|
def get_extensions(self):
|
|
'''Get a list of available OpenGL extensions.
|
|
|
|
:return: a list of the available extensions.
|
|
:rtype: list of str
|
|
'''
|
|
if not self.have_context:
|
|
warnings.warn('No GL context created yet.')
|
|
return self.extensions
|
|
|
|
def get_version(self):
|
|
'''Get the current OpenGL version.
|
|
|
|
:return: the OpenGL version
|
|
:rtype: str
|
|
'''
|
|
if not self.have_context:
|
|
warnings.warn('No GL context created yet.')
|
|
return self.version
|
|
|
|
def have_version(self, major, minor=0, release=0):
|
|
'''Determine if a version of OpenGL is supported.
|
|
|
|
:Parameters:
|
|
`major` : int
|
|
The major revision number (typically 1 or 2).
|
|
`minor` : int
|
|
The minor revision number.
|
|
`release` : int
|
|
The release number.
|
|
|
|
:rtype: bool
|
|
:return: True if the requested or a later version is supported.
|
|
'''
|
|
|
|
if not self.have_context:
|
|
warnings.warn('No GL context created yet.')
|
|
ver = '%s.0.0' % self.version.split(' ', 1)[0]
|
|
imajor, iminor, irelease = [int(v) for v in ver.split('.', 3)[:3]]
|
|
return imajor > major or \
|
|
(imajor == major and iminor > minor) or \
|
|
(imajor == major and iminor == minor and irelease >= release)
|
|
|
|
def get_renderer(self):
|
|
'''Determine the renderer string of the OpenGL context.
|
|
|
|
:rtype: str
|
|
'''
|
|
if not self.have_context:
|
|
warnings.warn('No GL context created yet.')
|
|
return self.renderer
|
|
|
|
def get_vendor(self):
|
|
'''Determine the vendor string of the OpenGL context.
|
|
|
|
:rtype: str
|
|
'''
|
|
if not self.have_context:
|
|
warnings.warn('No GL context created yet.')
|
|
return self.vendor
|
|
|
|
# Single instance useful for apps with only a single context (or all contexts
|
|
# have same GL driver, common case).
|
|
_gl_info = GLInfo()
|
|
|
|
set_active_context = _gl_info.set_active_context
|
|
remove_active_context = _gl_info.remove_active_context
|
|
have_extension = _gl_info.have_extension
|
|
get_extensions = _gl_info.get_extensions
|
|
get_version = _gl_info.get_version
|
|
have_version = _gl_info.have_version
|
|
get_renderer = _gl_info.get_renderer
|
|
get_vendor = _gl_info.get_vendor
|
|
|
|
def have_context():
|
|
'''Determine if a default OpenGL context has been set yet.
|
|
|
|
:rtype: bool
|
|
'''
|
|
return _gl_info.have_context
|