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February 23, 2018 14:51
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pyglet.gl
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# ---------------------------------------------------------------------------- | |
# pyglet | |
# Copyright (c) 2006-2008 Alex Holkner | |
# All rights reserved. | |
# | |
# Redistribution and use in source and binary forms, with or without | |
# modification, are permitted provided that the following conditions | |
# are met: | |
# | |
# * Redistributions of source code must retain the above copyright | |
# notice, this list of conditions and the following disclaimer. | |
# * Redistributions in binary form must reproduce the above copyright | |
# notice, this list of conditions and the following disclaimer in | |
# the documentation and/or other materials provided with the | |
# distribution. | |
# * Neither the name of pyglet nor the names of its | |
# contributors may be used to endorse or promote products | |
# derived from this software without specific prior written | |
# permission. | |
# | |
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS | |
# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE | |
# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, | |
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, | |
# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER | |
# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN | |
# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
# POSSIBILITY OF SUCH DAMAGE. | |
# ---------------------------------------------------------------------------- | |
'''OpenGL and GLU interface. | |
This package imports all OpenGL, GLU and registered OpenGL extension | |
functions. Functions have identical signatures to their C counterparts. For | |
example:: | |
from pyglet.gl import * | |
# [...omitted: set up a GL context and framebuffer] | |
glBegin(GL_QUADS) | |
glVertex3f(0, 0, 0) | |
glVertex3f(0.1, 0.2, 0.3) | |
glVertex3f(0.1, 0.2, 0.3) | |
glEnd() | |
OpenGL is documented in full at the `OpenGL Reference Pages`_. | |
The `OpenGL Programming Guide`_ is a popular reference manual organised by | |
topic. The free online version documents only OpenGL 1.1. `Later editions`_ | |
cover more recent versions of the API and can be purchased from a book store. | |
.. _OpenGL Reference Pages: http://www.opengl.org/documentation/red_book/ | |
.. _OpenGL Programming Guide: http://fly.cc.fer.hr/~unreal/theredbook/ | |
.. _Later editions: http://www.opengl.org/documentation/red_book/ | |
The following subpackages are imported into this "mega" package already (and | |
so are available by importing ``pyglet.gl``): | |
``pyglet.gl.gl`` | |
OpenGL | |
``pyglet.gl.glu`` | |
GLU | |
``pyglet.gl.gl.glext_arb`` | |
ARB registered OpenGL extension functions | |
These subpackages are also available, but are not imported into this namespace | |
by default: | |
``pyglet.gl.glext_nv`` | |
nVidia OpenGL extension functions | |
``pyglet.gl.agl`` | |
AGL (Mac OS X OpenGL context functions) | |
``pyglet.gl.glx`` | |
GLX (Linux OpenGL context functions) | |
``pyglet.gl.glxext_arb`` | |
ARB registered GLX extension functions | |
``pyglet.gl.glxext_nv`` | |
nvidia GLX extension functions | |
``pyglet.gl.wgl`` | |
WGL (Windows OpenGL context functions) | |
``pyglet.gl.wglext_arb`` | |
ARB registered WGL extension functions | |
``pyglet.gl.wglext_nv`` | |
nvidia WGL extension functions | |
The information modules are provided for convenience, and are documented | |
below. | |
''' | |
from __future__ import print_function | |
from __future__ import absolute_import | |
from builtins import range | |
__docformat__ = 'restructuredtext' | |
__version__ = '$Id$' | |
from pyglet.gl.lib import GLException | |
from pyglet.gl.gl import * | |
from pyglet.gl.glu import * | |
from pyglet.gl.glext_arb import * | |
from pyglet.gl import gl_info | |
import sys as _sys | |
_is_epydoc = hasattr(_sys, 'is_epydoc') and _sys.is_epydoc | |
#: The active OpenGL context. | |
#: | |
#: You can change the current context by calling `Context.set_current`; do not | |
#: modify this global. | |
#: | |
#: :type: `Context` | |
#: | |
#: .. versionadded:: 1.1 | |
current_context = None | |
def get_current_context(): | |
'''Return the active OpenGL context. | |
You can change the current context by calling `Context.set_current`. | |
:deprecated: Use `current_context` | |
:rtype: `Context` | |
:return: the context to which OpenGL commands are directed, or None | |
if there is no selected context. | |
''' | |
return current_context | |
class ContextException(Exception): | |
pass | |
class ConfigException(Exception): | |
pass | |
import pyglet as _pyglet | |
if _pyglet.options['debug_texture']: | |
_debug_texture_total = 0 | |
_debug_texture_sizes = {} | |
_debug_texture = None | |
def _debug_texture_alloc(texture, size): | |
global _debug_texture_total | |
_debug_texture_sizes[texture] = size | |
_debug_texture_total += size | |
print('%d (+%d)' % (_debug_texture_total, size)) | |
def _debug_texture_dealloc(texture): | |
global _debug_texture_total | |
size = _debug_texture_sizes[texture] | |
del _debug_texture_sizes[texture] | |
_debug_texture_total -= size | |
print('%d (-%d)' % (_debug_texture_total, size)) | |
_glBindTexture = glBindTexture | |
def glBindTexture(target, texture): | |
global _debug_texture | |
_debug_texture = texture | |
return _glBindTexture(target, texture) | |
_glTexImage2D = glTexImage2D | |
def glTexImage2D(target, level, internalformat, width, height, border, | |
format, type, pixels): | |
try: | |
_debug_texture_dealloc(_debug_texture) | |
except KeyError: | |
pass | |
if internalformat in (1, GL_ALPHA, GL_INTENSITY, GL_LUMINANCE): | |
depth = 1 | |
elif internalformat in (2, GL_RGB16, GL_RGBA16): | |
depth = 2 | |
elif internalformat in (3, GL_RGB): | |
depth = 3 | |
else: | |
depth = 4 # Pretty crap assumption | |
size = (width + 2 * border) * (height + 2 * border) * depth | |
_debug_texture_alloc(_debug_texture, size) | |
return _glTexImage2D(target, level, internalformat, width, height, | |
border, format, type, pixels) | |
_glDeleteTextures = glDeleteTextures | |
def glDeleteTextures(n, textures): | |
if not hasattr(textures, '__len__'): | |
_debug_texture_dealloc(textures.value) | |
else: | |
for i in range(n): | |
_debug_texture_dealloc(textures[i].value) | |
return _glDeleteTextures(n, textures) | |
def _create_shadow_window(): | |
global _shadow_window | |
import pyglet | |
if not pyglet.options['shadow_window'] or _is_epydoc: | |
return | |
from pyglet.window import Window | |
_shadow_window = Window(width=1, height=1, visible=False) | |
_shadow_window.switch_to() | |
from pyglet import app | |
app.windows.remove(_shadow_window) | |
from pyglet import compat_platform | |
from .base import ObjectSpace, CanvasConfig, Context | |
if _is_epydoc: | |
from .base import Config | |
elif compat_platform in ('win32', 'cygwin'): | |
from .win32 import Win32Config as Config | |
elif compat_platform.startswith('linux'): | |
from .xlib import XlibConfig as Config | |
elif compat_platform == 'darwin': | |
from .cocoa import CocoaConfig as Config | |
# del base | |
# XXX remove | |
_shadow_window = None | |
# Import pyglet.window now if it isn't currently being imported (this creates | |
# the shadow window). | |
if (not _is_epydoc and | |
'pyglet.window' not in _sys.modules and | |
_pyglet.options['shadow_window']): | |
# trickery is for circular import | |
_pyglet.gl = _sys.modules[__name__] | |
import pyglet.window |
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