98 lines
3.3 KiB
Python
98 lines
3.3 KiB
Python
import ctypes
|
|
|
|
import pyglet
|
|
|
|
__all__ = ['link_GL', 'link_AGL', 'link_GLX', 'link_WGL',
|
|
'GLException', 'missing_function', 'decorate_function']
|
|
|
|
_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(f'{name}({trace_args})')
|
|
else:
|
|
print(name)
|
|
|
|
from pyglet import gl
|
|
if not gl.current_context:
|
|
raise GLException('No GL context; create a Window first')
|
|
error = gl.glGetError()
|
|
if error:
|
|
# These are the 6 possible error codes we can get in opengl core 3.3+
|
|
error_types = {
|
|
gl.GL_INVALID_ENUM: "Invalid enum. An unacceptable value is specified for an enumerated argument.",
|
|
gl.GL_INVALID_VALUE: "Invalid value. A numeric argument is out of range.",
|
|
gl.GL_INVALID_OPERATION: "Invalid operation. The specified operation is not allowed in the current state.",
|
|
gl.GL_INVALID_FRAMEBUFFER_OPERATION: "Invalid framebuffer operation. The framebuffer object is not complete.",
|
|
gl.GL_OUT_OF_MEMORY: "Out of memory. There is not enough memory left to execute the command.",
|
|
}
|
|
msg = error_types.get(error, "Unknown error")
|
|
raise GLException(f'(0x{error}): {msg}')
|
|
return result
|
|
|
|
|
|
def decorate_function(func, name):
|
|
if _debug_gl:
|
|
if name not in ('glGetError',) and name[:3] not in ('glX', 'agl', 'wgl'):
|
|
func.errcheck = errcheck
|
|
|
|
|
|
link_AGL = None
|
|
link_GLX = None
|
|
link_WGL = None
|
|
|
|
if pyglet.compat_platform in ('win32', 'cygwin'):
|
|
from pyglet.gl.lib_wgl import link_GL, link_WGL
|
|
elif pyglet.compat_platform == 'darwin':
|
|
from pyglet.gl.lib_agl import link_GL, link_AGL
|
|
else:
|
|
from pyglet.gl.lib_glx import link_GL, link_GLX
|