Hi All,
I've just been trying to get started using pyglet-1.1.2. Setup is as
follows...
Mac OS 10.4.11
Intel 24" iMac ( white version, pre-aluminium).
Python 2.5.2 ( "enthon" distribution ")
I initially tried the pyglet that comes with Enthought distribution
but since it was an egg I rebuild manually so that I could debug.
The simple demo below fails to run. ( Stack trace from IPython is
below).
============================
import pyglet
#import pyglet.window
from pyglet.gl import Config
config = Config(sample_buffers=1, samples=4,
depth_size=16, double_buffer=True,)
window = WindowClass(resizable=True, config=config)
screen = pyglet.window.get_platform().get_default_display
().get_default_screen()
============================
/Users/andy/<ipython console> in <module>()
/tmp/python-58174lg.py in <module>()
2 #import pyglet.window
3
----> 4 from pyglet.gl import Config
5
6 config = Config(sample_buffers=1, samples=4,
/Library/Frameworks/Python.framework/Versions/2.5.2001/lib/python2.5/
site-packages/pyglet/gl/__init__.pyc in <module>()
503 'pyglet.window' not in _sys.modules and
504 _pyglet.options['shadow_window']):
505 # trickery is for circular import
506 _pyglet.gl = _sys.modules[__name__]
--> 507 import pyglet.window
/Library/Frameworks/Python.framework/Versions/2.5.2001/lib/python2.5/
site-packages/pyglet/window/__init__.pyc in <module>()
1687
1688 # Create shadow window. (trickery is for circular import)
1689 if not _is_epydoc:
1690 pyglet.window = sys.modules[__name__]
-> 1691 gl._create_shadow_window()
/Library/Frameworks/Python.framework/Versions/2.5.2001/lib/python2.5/
site-packages/pyglet/gl/__init__.pyc in _create_shadow_window()
489
490 from pyglet.window import Window
--> 491 _shadow_window = Window(width=1, height=1, visible=False)
492 _shadow_window.switch_to()
493
/Library/Frameworks/Python.framework/Versions/2.5.2001/lib/python2.5/
site-packages/pyglet/window/__init__.pyc in __init__(self, width,
height, caption, resizable, style, fullscreen, visible, vsync,
display, screen, config, context)
649
650 if not config.is_complete():
--> 651 config = screen.get_best_config(config)
652
653 print "Best - %s" % config
/Library/Frameworks/Python.framework/Versions/2.5.2001/lib/python2.5/
site-packages/pyglet/window/__init__.pyc in get_best_config(self,
template)
290 configs = self.get_matching_configs(template)
291 if not configs:
--> 292 raise NoSuchConfigException()
293 return configs[0]
294
NoSuchConfigException:
===============================
From what I've been able to gather -
/Library/Frameworks/Python.framework/Versions/2.5.2001/lib/python2.5/
site-packages/pyglet/window/__init__.pyc:290
configs = self.get_matching_configs(template)
calls into ....
/Library/Frameworks/Python.framework/Versions/2.5.2001/lib/python2.5/
site-packages/pyglet/window/carbon/__init__.py
def get_matching_configs(self, template):
# Construct array of attributes for aglChoosePixelFormat
attrs = []
for name, value in template.get_gl_attributes():
attr = CarbonGLConfig._attribute_ids.get(name, None)
if not attr or not value:
continue
attrs.append(attr)
if attr not in CarbonGLConfig._boolean_attributes:
attrs.append(int(value))
# Support for RAGE-II, which is not compliant
attrs.append(agl.AGL_ALL_RENDERERS)
# Force selection policy and RGBA
attrs.append(agl.AGL_MAXIMUM_POLICY)
attrs.append(agl.AGL_RGBA)
# In 10.3 and later, AGL_FULLSCREEN is specified so the
window can
# be toggled to/from fullscreen without losing context. pyglet
# no longer supports earlier versions of OS X, so we always
supply it.
attrs.append(agl.AGL_FULLSCREEN)
# Terminate the list.
attrs.append(agl.AGL_NONE)
attrib_list = (c_int * len(attrs))(*attrs)
device = self.get_gdevice()
pformat = agl.aglChoosePixelFormat(device, 1, attrib_list)
_aglcheck()
if not pformat:
return []
else:
return [CarbonGLConfig(self, pformat)]
===============================================
I've ran through this function in pdb and immediately prior to exit
pformat and device
are set as follows ....
(Pdb) device
<ctypes.LP_LP_struct_GDevice object at 0x15119e0>
(Pdb) bool(device)
True
(Pdb) pformat
<ctypes.LP_struct___AGLPixelFormatRec object at 0x1511a30>
(Pdb) bool(pformat)
False
(Pdb)
since pformat evaluates to false the list returned by
get_matching_configs is empty hence the exception. My guess is the
underlying C API returned a Null and a 'False' object is how ctypes
represents this right?
I'm not really sure what attributes I should be trying to pass into
agl.aglChoosePixelFormat(device, 1, attrib_list) otherwise I would
debug further.
Can anyone help?!
Many thanks!
A.
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