# ----------------------------------------------------------------------------
# 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.
# ----------------------------------------------------------------------------
'''
'''
__docformat__ = 'restructuredtext'
__version__ = '$Id: lib.py 1978 2008-03-28 15:11:48Z Alex.Holkner $'
import sys
import ctypes
import pyglet
__all__ = ['link_GL', 'link_GLU', 'link_AGL', 'link_GLX', 'link_WGL']
_debug_gl = pyglet.options['debug_gl']
_debug_gl_trace = pyglet.options['debug_gl_trace']
_debug_gl_trace_args = pyglet.options['debug_gl_trace_args']
class MissingFunctionException(Exception):
def __init__(self, name, requires=None, suggestions=None):
msg = '%s is not exported by the available OpenGL driver.' % name
if requires:
msg += ' %s is required for this functionality.' % requires
if suggestions:
msg += ' Consider alternative(s) %s.' % ', '.join(suggestions)
Exception.__init__(self, msg)
def missing_function(name, requires=None, suggestions=None):
def MissingFunction(*args, **kwargs):
raise MissingFunctionException(name, requires, suggestions)
return MissingFunction
_int_types = (ctypes.c_int16, ctypes.c_int32)
if hasattr(ctypes, 'c_int64'):
# Some builds of ctypes apparently do not have c_int64
# defined; it's a pretty good bet that these builds do not
# have 64-bit pointers.
_int_types += (ctypes.c_int64,)
for t in _int_types:
if ctypes.sizeof(t) == ctypes.sizeof(ctypes.c_size_t):
c_ptrdiff_t = t
class c_void(ctypes.Structure):
# c_void_p is a buggy return type, converting to int, so
# POINTER(None) == c_void_p is actually written as
# POINTER(c_void), so it can be treated as a real pointer.
_fields_ = [('dummy', ctypes.c_int)]
class GLException(Exception):
pass
def errcheck(result, func, arguments):
if _debug_gl_trace:
try:
name = func.__name__
except AttributeError:
name = repr(func)
if _debug_gl_trace_args:
trace_args = ', '.join([repr(arg)[:20] for arg in arguments])
print '%s(%s)' % (name, trace_args)
else:
print name
from pyglet import gl
context = gl.current_context
if not context:
raise GLException('No GL context; create a Window first')
if not context._gl_begin:
error = gl.glGetError()
if error:
msg = ctypes.cast(gl.gluErrorString(error), ctypes.c_char_p).value
raise GLException(msg)
return result
def errcheck_glbegin(result, func, arguments):
from pyglet import gl
context = gl.current_context
if not context:
raise GLException('No GL context; create a Window first')
context._gl_begin = True
return result
def errcheck_glend(result, func, arguments):
from pyglet import gl
context = gl.current_context
if not context:
raise GLException('No GL context; create a Window first')
context._gl_begin = False
return errcheck(result, func, arguments)
def decorate_function(func, name):
if _debug_gl:
if name == 'glBegin':
func.errcheck = errcheck_glbegin
elif name == 'glEnd':
func.errcheck = errcheck_glend
elif name not in ('glGetError', 'gluErrorString') and \
name[:3] not in ('glX', 'agl', 'wgl'):
func.errcheck = errcheck
link_AGL = None
link_GLX = None
link_WGL = None
if sys.platform in ('win32', 'cygwin'):
from pyglet.gl.lib_wgl import link_GL,link_GLU,link_WGL
elif sys.platform == 'darwin':
from pyglet.gl.lib_agl import link_GL,link_GLU,link_AGL
else:
from pyglet.gl.lib_glx import link_GL,link_GLU,link_GLX
|