def match(self, canvas):
if not isinstance(canvas, XlibCanvas):
raise RuntimeError('Canvas must be instance of XlibCanvas')
x_display = canvas.display._display
x_screen = canvas.display.x_screen
info = glx_info.GLXInfo(x_display)
have_13 = info.have_version(1, 3)
if have_13:
config_class = XlibCanvasConfig13
else:
if 'ATI' in info.get_client_vendor():
config_class = XlibCanvasConfig10ATI
else:
config_class = XlibCanvasConfig10
# Construct array of attributes
attrs = []
for name, value in self.get_gl_attributes():
attr = config_class.attribute_ids.get(name, None)
if attr and value is not None:
attrs.extend([attr, int(value)])
if have_13:
attrs.extend([glx.GLX_X_RENDERABLE, True])
else:
attrs.extend([glx.GLX_RGBA, True])
if len(attrs):
attrs.extend([0, 0])
attrib_list = (c_int * len(attrs))(*attrs)
else:
attrib_list = None
if have_13:
elements = c_int()
configs = glx.glXChooseFBConfig(x_display, x_screen, attrib_list,
byref(elements))
if not configs:
return []
configs = cast(configs,
POINTER(glx.GLXFBConfig * elements.value)).contents
result = [config_class(canvas, info, c, self) for c in configs]
# Can't free array until all XlibGLConfig13's are GC'd. Too much
# hassle, live with leak. XXX
#xlib.XFree(configs)
return result
else:
try:
return [config_class(canvas, info, attrib_list, self)]
except gl.ContextException:
return []
def __init__(self, name):
super(XlibDisplayDevice, self).__init__()
self._display = xlib.XOpenDisplay(name)
if not self._display:
raise NoSuchDisplayException('Cannot connect to "%s"' % name)
self.info = glx_info.GLXInfo(self._display)
# Also set the default GLX display for future info queries
glx_info.set_display(self._display.contents)