def link_GL(name, restype, argtypes, requires=None, suggestions=None):
try:
func = getattr(gl_lib, name)
func.restype = restype
func.argtypes = argtypes
decorate_function(func, name)
return func
except AttributeError:
# Not in opengl32.dll. Try and get a pointer from WGL.
try:
fargs = (restype,) + tuple(argtypes)
ftype = ctypes.WINFUNCTYPE(*fargs)
if _have_get_proc_address:
from pyglet.gl import gl_info
if gl_info.have_context():
address = wglGetProcAddress(name)
if address:
func = cast(address, ftype)
decorate_function(func, name)
return func
else:
# Insert proxy until we have a context
return WGLFunctionProxy(name, ftype, requires, suggestions)
except:
pass
return missing_function(name, requires, suggestions)
def get_matching_configs(self, template):
# Determine which technique should be used for finding matching configs.
# Use the builtin PIXELFORMATDESCRIPTOR if possible, otherwise resort
# to the WGL_ARB_pixel_format extension.
need_pixel_format_arb = False
if template.sample_buffers or template.samples:
need_pixel_format_arb = True
if need_pixel_format_arb:
# Need a GL context before we can query WGL extensions.
dummy_window = None
if not gl_info.have_context():
# Create a dummy context
config = self.get_best_config()
context = config.create_context(None)
dummy_window = Win32Window(visible=False, context=context)
try:
# Check for required extensions
if not wgl_info.have_extension('WGL_ARB_pixel_format'):
return []
return self._get_arb_pixel_format_matching_configs(template)
finally:
if dummy_window:
dummy_window.close()
return self._get_pixel_format_descriptor_matching_configs(template)
def get_extensions(self):
if not gl_info.have_context():
warnings.warn("Can't query WGL until a context is created.")
return []
try:
return wglGetExtensionsStringEXT().split()
except MissingFunctionException:
return cast(glGetString(GL_EXTENSIONS), c_char_p).value.split()
def get_extensions(self):
if not gl_info.have_context():
warnings.warn("Can't query WGL until a context is created.")
return []
try:
return wglGetExtensionsStringEXT().split()
except MissingFunctionException:
return cast(glGetString(GL_EXTENSIONS), c_char_p).value.split()
def match(self, canvas):
if not isinstance(canvas, Win32Canvas):
raise RuntimeError("Canvas must be instance of Win32Canvas")
# Use ARB API if available
if gl_info.have_context() and wgl_info.have_extension("WGL_ARB_pixel_format"):
return self._get_arb_pixel_format_matching_configs(canvas)
else:
return self._get_pixel_format_descriptor_matching_configs(canvas)
def match(self, canvas):
if not isinstance(canvas, Win32Canvas):
raise RuntimeError('Canvas must be instance of Win32Canvas')
# Use ARB API if available
if gl_info.have_context() and wgl_info.have_extension('WGL_ARB_pixel_format'):
return self._get_arb_pixel_format_matching_configs(canvas)
else:
return self._get_pixel_format_descriptor_matching_configs(canvas)
def __call__(self, *args, **kwargs):
if self.func:
return self.func(*args, **kwargs)
from pyglet.gl import gl_info
if not gl_info.have_context():
raise Exception(
'Call to function "%s" before GL context created' % self.name)
address = wglGetProcAddress(self.name)
if cast(address, POINTER(c_int)): # check cast because address is func
self.func = cast(address, self.ftype)
decorate_function(self.func, self.name)
else:
self.func = missing_function(
self.name, self.requires, self.suggestions)
result = self.func(*args, **kwargs)
return result
def __call__(self, *args, **kwargs):
if self.func:
return self.func(*args, **kwargs)
from pyglet.gl import gl_info
if not gl_info.have_context():
raise Exception('Call to function "%s" before GL context created' %
self.name)
address = wglGetProcAddress(self.name)
if cast(address, POINTER(c_int)): # check cast because address is func
self.func = cast(address, self.ftype)
decorate_function(self.func, self.name)
else:
self.func = missing_function(self.name, self.requires,
self.suggestions)
result = self.func(*args, **kwargs)
return result
