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Runtime error
Runtime error
| 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 | |
| context = gl.current_context | |
| if not 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 | |