On Sunday, 8 February 2015 22:40:28 UTC+11, Daniel Gillet wrote:
>
> Hello,
>
> On my laptop when trying to launch this minimal code
> import pyglet
>
> pic = pyglet.image.load('image1.png',
> file=pyglet.resource.file('image1.png'))
> texture = pic.get_texture()
>
> window = pyglet.window.Window()
>
> @window.event
> def on_draw():
> window.clear()
>
> pyglet.app.run()
>
> I get this error message: pyglet.gl.ContextException: Unable to share
> contexts with this stack trace:
>
> Traceback (most recent call last):
> File "test.py", line 9, in <module>
> window = pyglet.window.Window()
> File
> "C:\Python27\lib\site-packages\pyglet-1.2.0rc3-py2.7.egg\pyglet\window\win32\__init__.py",
>
> line 131, in __init__
> super(Win32Window, self).__init__(*args, **kwargs)
> File
> "C:\Python27\lib\site-packages\pyglet-1.2.0rc3-py2.7.egg\pyglet\window\__init__.py",
>
> line 559, in __init__
> self._create()
> File
> "C:\Python27\lib\site-packages\pyglet-1.2.0rc3-py2.7.egg\pyglet\window\win32\__init__.py",
>
> line 261, in _create
> self.context.attach(self.canvas)
> File
> "C:\Python27\lib\site-packages\pyglet-1.2.0rc3-py2.7.egg\pyglet\gl\win32.py",
> line 263, in attach
> super(Win32ARBContext, self).attach(canvas)
> File
> "C:\Python27\lib\site-packages\pyglet-1.2.0rc3-py2.7.egg\pyglet\gl\win32.py",
> line 208, in attach
> raise gl.ContextException('Unable to share contexts')
> pyglet.gl.ContextException: Unable to share contexts
>
> If I create the window before the texture = pic.get_texture(), it works
> correctly. I cannot reproduce this error on my desktop.
>
> I believe this comes from
> pyglet\image\__init__.py(1502)create()
> id = GLuint()
> which (I'm guessing here) is creating a context. So when trying to create
> the window, we have more than one OpenGL context and it throws an exception
> with my video card driver.
>
Hi, you later post that you're using an Intel HD 4000 system. We've
historically noticed that Intel systems don't support shared opengl
contexts.
You can disable the automatic creation of a shadow context by setting the
environment variable
PYGLET_SHADOW_WINDOW=0
Note that if you do this then you must alter your application to always
open its window first - if you don't and load images first you'll get all
sorts of brokenness (and possibly segfaults).
Richard
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