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glfw/src/glx_context.c
Camilla Löwy 6659a80040 X11: Fix sonames for loaded libraries on NetBSD 
The NetBSD sonames for X11 and related libraries is more stable than on
OpenBSD but the version numbers are still bumped more often than their
Linux counterparts, even excluding the one-time version bump across all
X11 related libraries.

This commit moves to using version-less sonames for X11 and related
libraries on NetBSD, which will hopefully be more forward-compatible
than hard-coding NetBSD-specific sonames.

This may not be the correct long-term solution but it runs now.

Binaries also appear to need an LD_LIBRARY_PATH or rpath entry of
/usr/X11R7/lib in order for the libraries to be found by dlopen.

Tested on NetBSD 9.2.

(cherry picked from commit d78b0a4ead)
2022-03-13 16:43:58 +01:00

702 lines
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//========================================================================
// GLFW 3.3 GLX - www.glfw.org
//------------------------------------------------------------------------
// Copyright (c) 2002-2006 Marcus Geelnard
// Copyright (c) 2006-2019 Camilla Löwy <elmindreda@glfw.org>
//
// This software is provided 'as-is', without any express or implied
// warranty. In no event will the authors be held liable for any damages
// arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it
// freely, subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented; you must not
// claim that you wrote the original software. If you use this software
// in a product, an acknowledgment in the product documentation would
// be appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such, and must not
// be misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source
// distribution.
//
//========================================================================
// It is fine to use C99 in this file because it will not be built with VS
//========================================================================
#include "internal.h"
#include <string.h>
#include <stdlib.h>
#include <assert.h>
#ifndef GLXBadProfileARB
#define GLXBadProfileARB 13
#endif
// Returns the specified attribute of the specified GLXFBConfig
//
static int getGLXFBConfigAttrib(GLXFBConfig fbconfig, int attrib)
{
int value;
glXGetFBConfigAttrib(_glfw.x11.display, fbconfig, attrib, &value);
return value;
}
// Return the GLXFBConfig most closely matching the specified hints
//
static GLFWbool chooseGLXFBConfig(const _GLFWfbconfig* desired,
GLXFBConfig* result)
{
GLXFBConfig* nativeConfigs;
_GLFWfbconfig* usableConfigs;
const _GLFWfbconfig* closest;
int i, nativeCount, usableCount;
const char* vendor;
GLFWbool trustWindowBit = GLFW_TRUE;
// HACK: This is a (hopefully temporary) workaround for Chromium
// (VirtualBox GL) not setting the window bit on any GLXFBConfigs
vendor = glXGetClientString(_glfw.x11.display, GLX_VENDOR);
if (vendor && strcmp(vendor, "Chromium") == 0)
trustWindowBit = GLFW_FALSE;
nativeConfigs =
glXGetFBConfigs(_glfw.x11.display, _glfw.x11.screen, &nativeCount);
if (!nativeConfigs || !nativeCount)
{
_glfwInputError(GLFW_API_UNAVAILABLE, "GLX: No GLXFBConfigs returned");
return GLFW_FALSE;
}
usableConfigs = calloc(nativeCount, sizeof(_GLFWfbconfig));
usableCount = 0;
for (i = 0; i < nativeCount; i++)
{
const GLXFBConfig n = nativeConfigs[i];
_GLFWfbconfig* u = usableConfigs + usableCount;
// Only consider RGBA GLXFBConfigs
if (!(getGLXFBConfigAttrib(n, GLX_RENDER_TYPE) & GLX_RGBA_BIT))
continue;
// Only consider window GLXFBConfigs
if (!(getGLXFBConfigAttrib(n, GLX_DRAWABLE_TYPE) & GLX_WINDOW_BIT))
{
if (trustWindowBit)
continue;
}
if (getGLXFBConfigAttrib(n, GLX_DOUBLEBUFFER) != desired->doublebuffer)
continue;
if (desired->transparent)
{
XVisualInfo* vi = glXGetVisualFromFBConfig(_glfw.x11.display, n);
if (vi)
{
u->transparent = _glfwIsVisualTransparentX11(vi->visual);
XFree(vi);
}
}
u->redBits = getGLXFBConfigAttrib(n, GLX_RED_SIZE);
u->greenBits = getGLXFBConfigAttrib(n, GLX_GREEN_SIZE);
u->blueBits = getGLXFBConfigAttrib(n, GLX_BLUE_SIZE);
u->alphaBits = getGLXFBConfigAttrib(n, GLX_ALPHA_SIZE);
u->depthBits = getGLXFBConfigAttrib(n, GLX_DEPTH_SIZE);
u->stencilBits = getGLXFBConfigAttrib(n, GLX_STENCIL_SIZE);
u->accumRedBits = getGLXFBConfigAttrib(n, GLX_ACCUM_RED_SIZE);
u->accumGreenBits = getGLXFBConfigAttrib(n, GLX_ACCUM_GREEN_SIZE);
u->accumBlueBits = getGLXFBConfigAttrib(n, GLX_ACCUM_BLUE_SIZE);
u->accumAlphaBits = getGLXFBConfigAttrib(n, GLX_ACCUM_ALPHA_SIZE);
u->auxBuffers = getGLXFBConfigAttrib(n, GLX_AUX_BUFFERS);
if (getGLXFBConfigAttrib(n, GLX_STEREO))
u->stereo = GLFW_TRUE;
if (_glfw.glx.ARB_multisample)
u->samples = getGLXFBConfigAttrib(n, GLX_SAMPLES);
if (_glfw.glx.ARB_framebuffer_sRGB || _glfw.glx.EXT_framebuffer_sRGB)
u->sRGB = getGLXFBConfigAttrib(n, GLX_FRAMEBUFFER_SRGB_CAPABLE_ARB);
u->handle = (uintptr_t) n;
usableCount++;
}
closest = _glfwChooseFBConfig(desired, usableConfigs, usableCount);
if (closest)
*result = (GLXFBConfig) closest->handle;
XFree(nativeConfigs);
free(usableConfigs);
return closest != NULL;
}
// Create the OpenGL context using legacy API
//
static GLXContext createLegacyContextGLX(_GLFWwindow* window,
GLXFBConfig fbconfig,
GLXContext share)
{
return glXCreateNewContext(_glfw.x11.display,
fbconfig,
GLX_RGBA_TYPE,
share,
True);
}
static void makeContextCurrentGLX(_GLFWwindow* window)
{
if (window)
{
if (!glXMakeCurrent(_glfw.x11.display,
window->context.glx.window,
window->context.glx.handle))
{
_glfwInputError(GLFW_PLATFORM_ERROR,
"GLX: Failed to make context current");
return;
}
}
else
{
if (!glXMakeCurrent(_glfw.x11.display, None, NULL))
{
_glfwInputError(GLFW_PLATFORM_ERROR,
"GLX: Failed to clear current context");
return;
}
}
_glfwPlatformSetTls(&_glfw.contextSlot, window);
}
static void swapBuffersGLX(_GLFWwindow* window)
{
glXSwapBuffers(_glfw.x11.display, window->context.glx.window);
}
static void swapIntervalGLX(int interval)
{
_GLFWwindow* window = _glfwPlatformGetTls(&_glfw.contextSlot);
if (_glfw.glx.EXT_swap_control)
{
_glfw.glx.SwapIntervalEXT(_glfw.x11.display,
window->context.glx.window,
interval);
}
else if (_glfw.glx.MESA_swap_control)
_glfw.glx.SwapIntervalMESA(interval);
else if (_glfw.glx.SGI_swap_control)
{
if (interval > 0)
_glfw.glx.SwapIntervalSGI(interval);
}
}
static int extensionSupportedGLX(const char* extension)
{
const char* extensions =
glXQueryExtensionsString(_glfw.x11.display, _glfw.x11.screen);
if (extensions)
{
if (_glfwStringInExtensionString(extension, extensions))
return GLFW_TRUE;
}
return GLFW_FALSE;
}
static GLFWglproc getProcAddressGLX(const char* procname)
{
if (_glfw.glx.GetProcAddress)
return _glfw.glx.GetProcAddress((const GLubyte*) procname);
else if (_glfw.glx.GetProcAddressARB)
return _glfw.glx.GetProcAddressARB((const GLubyte*) procname);
else
return _glfw_dlsym(_glfw.glx.handle, procname);
}
static void destroyContextGLX(_GLFWwindow* window)
{
if (window->context.glx.window)
{
glXDestroyWindow(_glfw.x11.display, window->context.glx.window);
window->context.glx.window = None;
}
if (window->context.glx.handle)
{
glXDestroyContext(_glfw.x11.display, window->context.glx.handle);
window->context.glx.handle = NULL;
}
}
//////////////////////////////////////////////////////////////////////////
////// GLFW internal API //////
//////////////////////////////////////////////////////////////////////////
// Initialize GLX
//
GLFWbool _glfwInitGLX(void)
{
int i;
const char* sonames[] =
{
#if defined(_GLFW_GLX_LIBRARY)
_GLFW_GLX_LIBRARY,
#elif defined(__CYGWIN__)
"libGL-1.so",
#elif defined(__OpenBSD__) || defined(__NetBSD__)
"libGL.so",
#else
"libGL.so.1",
"libGL.so",
#endif
NULL
};
if (_glfw.glx.handle)
return GLFW_TRUE;
for (i = 0; sonames[i]; i++)
{
_glfw.glx.handle = _glfw_dlopen(sonames[i]);
if (_glfw.glx.handle)
break;
}
if (!_glfw.glx.handle)
{
_glfwInputError(GLFW_API_UNAVAILABLE, "GLX: Failed to load GLX");
return GLFW_FALSE;
}
_glfw.glx.GetFBConfigs =
_glfw_dlsym(_glfw.glx.handle, "glXGetFBConfigs");
_glfw.glx.GetFBConfigAttrib =
_glfw_dlsym(_glfw.glx.handle, "glXGetFBConfigAttrib");
_glfw.glx.GetClientString =
_glfw_dlsym(_glfw.glx.handle, "glXGetClientString");
_glfw.glx.QueryExtension =
_glfw_dlsym(_glfw.glx.handle, "glXQueryExtension");
_glfw.glx.QueryVersion =
_glfw_dlsym(_glfw.glx.handle, "glXQueryVersion");
_glfw.glx.DestroyContext =
_glfw_dlsym(_glfw.glx.handle, "glXDestroyContext");
_glfw.glx.MakeCurrent =
_glfw_dlsym(_glfw.glx.handle, "glXMakeCurrent");
_glfw.glx.SwapBuffers =
_glfw_dlsym(_glfw.glx.handle, "glXSwapBuffers");
_glfw.glx.QueryExtensionsString =
_glfw_dlsym(_glfw.glx.handle, "glXQueryExtensionsString");
_glfw.glx.CreateNewContext =
_glfw_dlsym(_glfw.glx.handle, "glXCreateNewContext");
_glfw.glx.CreateWindow =
_glfw_dlsym(_glfw.glx.handle, "glXCreateWindow");
_glfw.glx.DestroyWindow =
_glfw_dlsym(_glfw.glx.handle, "glXDestroyWindow");
_glfw.glx.GetVisualFromFBConfig =
_glfw_dlsym(_glfw.glx.handle, "glXGetVisualFromFBConfig");
if (!_glfw.glx.GetFBConfigs ||
!_glfw.glx.GetFBConfigAttrib ||
!_glfw.glx.GetClientString ||
!_glfw.glx.QueryExtension ||
!_glfw.glx.QueryVersion ||
!_glfw.glx.DestroyContext ||
!_glfw.glx.MakeCurrent ||
!_glfw.glx.SwapBuffers ||
!_glfw.glx.QueryExtensionsString ||
!_glfw.glx.CreateNewContext ||
!_glfw.glx.CreateWindow ||
!_glfw.glx.DestroyWindow ||
!_glfw.glx.GetVisualFromFBConfig)
{
_glfwInputError(GLFW_PLATFORM_ERROR,
"GLX: Failed to load required entry points");
return GLFW_FALSE;
}
// NOTE: Unlike GLX 1.3 entry points these are not required to be present
_glfw.glx.GetProcAddress = (PFNGLXGETPROCADDRESSPROC)
_glfw_dlsym(_glfw.glx.handle, "glXGetProcAddress");
_glfw.glx.GetProcAddressARB = (PFNGLXGETPROCADDRESSPROC)
_glfw_dlsym(_glfw.glx.handle, "glXGetProcAddressARB");
if (!glXQueryExtension(_glfw.x11.display,
&_glfw.glx.errorBase,
&_glfw.glx.eventBase))
{
_glfwInputError(GLFW_API_UNAVAILABLE, "GLX: GLX extension not found");
return GLFW_FALSE;
}
if (!glXQueryVersion(_glfw.x11.display, &_glfw.glx.major, &_glfw.glx.minor))
{
_glfwInputError(GLFW_API_UNAVAILABLE,
"GLX: Failed to query GLX version");
return GLFW_FALSE;
}
if (_glfw.glx.major == 1 && _glfw.glx.minor < 3)
{
_glfwInputError(GLFW_API_UNAVAILABLE,
"GLX: GLX version 1.3 is required");
return GLFW_FALSE;
}
if (extensionSupportedGLX("GLX_EXT_swap_control"))
{
_glfw.glx.SwapIntervalEXT = (PFNGLXSWAPINTERVALEXTPROC)
getProcAddressGLX("glXSwapIntervalEXT");
if (_glfw.glx.SwapIntervalEXT)
_glfw.glx.EXT_swap_control = GLFW_TRUE;
}
if (extensionSupportedGLX("GLX_SGI_swap_control"))
{
_glfw.glx.SwapIntervalSGI = (PFNGLXSWAPINTERVALSGIPROC)
getProcAddressGLX("glXSwapIntervalSGI");
if (_glfw.glx.SwapIntervalSGI)
_glfw.glx.SGI_swap_control = GLFW_TRUE;
}
if (extensionSupportedGLX("GLX_MESA_swap_control"))
{
_glfw.glx.SwapIntervalMESA = (PFNGLXSWAPINTERVALMESAPROC)
getProcAddressGLX("glXSwapIntervalMESA");
if (_glfw.glx.SwapIntervalMESA)
_glfw.glx.MESA_swap_control = GLFW_TRUE;
}
if (extensionSupportedGLX("GLX_ARB_multisample"))
_glfw.glx.ARB_multisample = GLFW_TRUE;
if (extensionSupportedGLX("GLX_ARB_framebuffer_sRGB"))
_glfw.glx.ARB_framebuffer_sRGB = GLFW_TRUE;
if (extensionSupportedGLX("GLX_EXT_framebuffer_sRGB"))
_glfw.glx.EXT_framebuffer_sRGB = GLFW_TRUE;
if (extensionSupportedGLX("GLX_ARB_create_context"))
{
_glfw.glx.CreateContextAttribsARB = (PFNGLXCREATECONTEXTATTRIBSARBPROC)
getProcAddressGLX("glXCreateContextAttribsARB");
if (_glfw.glx.CreateContextAttribsARB)
_glfw.glx.ARB_create_context = GLFW_TRUE;
}
if (extensionSupportedGLX("GLX_ARB_create_context_robustness"))
_glfw.glx.ARB_create_context_robustness = GLFW_TRUE;
if (extensionSupportedGLX("GLX_ARB_create_context_profile"))
_glfw.glx.ARB_create_context_profile = GLFW_TRUE;
if (extensionSupportedGLX("GLX_EXT_create_context_es2_profile"))
_glfw.glx.EXT_create_context_es2_profile = GLFW_TRUE;
if (extensionSupportedGLX("GLX_ARB_create_context_no_error"))
_glfw.glx.ARB_create_context_no_error = GLFW_TRUE;
if (extensionSupportedGLX("GLX_ARB_context_flush_control"))
_glfw.glx.ARB_context_flush_control = GLFW_TRUE;
return GLFW_TRUE;
}
// Terminate GLX
//
void _glfwTerminateGLX(void)
{
// NOTE: This function must not call any X11 functions, as it is called
// after XCloseDisplay (see _glfwPlatformTerminate for details)
if (_glfw.glx.handle)
{
_glfw_dlclose(_glfw.glx.handle);
_glfw.glx.handle = NULL;
}
}
#define setAttrib(a, v) \
{ \
assert(((size_t) index + 1) < sizeof(attribs) / sizeof(attribs[0])); \
attribs[index++] = a; \
attribs[index++] = v; \
}
// Create the OpenGL or OpenGL ES context
//
GLFWbool _glfwCreateContextGLX(_GLFWwindow* window,
const _GLFWctxconfig* ctxconfig,
const _GLFWfbconfig* fbconfig)
{
int attribs[40];
GLXFBConfig native = NULL;
GLXContext share = NULL;
if (ctxconfig->share)
share = ctxconfig->share->context.glx.handle;
if (!chooseGLXFBConfig(fbconfig, &native))
{
_glfwInputError(GLFW_FORMAT_UNAVAILABLE,
"GLX: Failed to find a suitable GLXFBConfig");
return GLFW_FALSE;
}
if (ctxconfig->client == GLFW_OPENGL_ES_API)
{
if (!_glfw.glx.ARB_create_context ||
!_glfw.glx.ARB_create_context_profile ||
!_glfw.glx.EXT_create_context_es2_profile)
{
_glfwInputError(GLFW_API_UNAVAILABLE,
"GLX: OpenGL ES requested but GLX_EXT_create_context_es2_profile is unavailable");
return GLFW_FALSE;
}
}
if (ctxconfig->forward)
{
if (!_glfw.glx.ARB_create_context)
{
_glfwInputError(GLFW_VERSION_UNAVAILABLE,
"GLX: Forward compatibility requested but GLX_ARB_create_context_profile is unavailable");
return GLFW_FALSE;
}
}
if (ctxconfig->profile)
{
if (!_glfw.glx.ARB_create_context ||
!_glfw.glx.ARB_create_context_profile)
{
_glfwInputError(GLFW_VERSION_UNAVAILABLE,
"GLX: An OpenGL profile requested but GLX_ARB_create_context_profile is unavailable");
return GLFW_FALSE;
}
}
_glfwGrabErrorHandlerX11();
if (_glfw.glx.ARB_create_context)
{
int index = 0, mask = 0, flags = 0;
if (ctxconfig->client == GLFW_OPENGL_API)
{
if (ctxconfig->forward)
flags |= GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB;
if (ctxconfig->profile == GLFW_OPENGL_CORE_PROFILE)
mask |= GLX_CONTEXT_CORE_PROFILE_BIT_ARB;
else if (ctxconfig->profile == GLFW_OPENGL_COMPAT_PROFILE)
mask |= GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB;
}
else
mask |= GLX_CONTEXT_ES2_PROFILE_BIT_EXT;
if (ctxconfig->debug)
flags |= GLX_CONTEXT_DEBUG_BIT_ARB;
if (ctxconfig->robustness)
{
if (_glfw.glx.ARB_create_context_robustness)
{
if (ctxconfig->robustness == GLFW_NO_RESET_NOTIFICATION)
{
setAttrib(GLX_CONTEXT_RESET_NOTIFICATION_STRATEGY_ARB,
GLX_NO_RESET_NOTIFICATION_ARB);
}
else if (ctxconfig->robustness == GLFW_LOSE_CONTEXT_ON_RESET)
{
setAttrib(GLX_CONTEXT_RESET_NOTIFICATION_STRATEGY_ARB,
GLX_LOSE_CONTEXT_ON_RESET_ARB);
}
flags |= GLX_CONTEXT_ROBUST_ACCESS_BIT_ARB;
}
}
if (ctxconfig->release)
{
if (_glfw.glx.ARB_context_flush_control)
{
if (ctxconfig->release == GLFW_RELEASE_BEHAVIOR_NONE)
{
setAttrib(GLX_CONTEXT_RELEASE_BEHAVIOR_ARB,
GLX_CONTEXT_RELEASE_BEHAVIOR_NONE_ARB);
}
else if (ctxconfig->release == GLFW_RELEASE_BEHAVIOR_FLUSH)
{
setAttrib(GLX_CONTEXT_RELEASE_BEHAVIOR_ARB,
GLX_CONTEXT_RELEASE_BEHAVIOR_FLUSH_ARB);
}
}
}
if (ctxconfig->noerror)
{
if (_glfw.glx.ARB_create_context_no_error)
setAttrib(GLX_CONTEXT_OPENGL_NO_ERROR_ARB, GLFW_TRUE);
}
// NOTE: Only request an explicitly versioned context when necessary, as
// explicitly requesting version 1.0 does not always return the
// highest version supported by the driver
if (ctxconfig->major != 1 || ctxconfig->minor != 0)
{
setAttrib(GLX_CONTEXT_MAJOR_VERSION_ARB, ctxconfig->major);
setAttrib(GLX_CONTEXT_MINOR_VERSION_ARB, ctxconfig->minor);
}
if (mask)
setAttrib(GLX_CONTEXT_PROFILE_MASK_ARB, mask);
if (flags)
setAttrib(GLX_CONTEXT_FLAGS_ARB, flags);
setAttrib(None, None);
window->context.glx.handle =
_glfw.glx.CreateContextAttribsARB(_glfw.x11.display,
native,
share,
True,
attribs);
// HACK: This is a fallback for broken versions of the Mesa
// implementation of GLX_ARB_create_context_profile that fail
// default 1.0 context creation with a GLXBadProfileARB error in
// violation of the extension spec
if (!window->context.glx.handle)
{
if (_glfw.x11.errorCode == _glfw.glx.errorBase + GLXBadProfileARB &&
ctxconfig->client == GLFW_OPENGL_API &&
ctxconfig->profile == GLFW_OPENGL_ANY_PROFILE &&
ctxconfig->forward == GLFW_FALSE)
{
window->context.glx.handle =
createLegacyContextGLX(window, native, share);
}
}
}
else
{
window->context.glx.handle =
createLegacyContextGLX(window, native, share);
}
_glfwReleaseErrorHandlerX11();
if (!window->context.glx.handle)
{
_glfwInputErrorX11(GLFW_VERSION_UNAVAILABLE, "GLX: Failed to create context");
return GLFW_FALSE;
}
window->context.glx.window =
glXCreateWindow(_glfw.x11.display, native, window->x11.handle, NULL);
if (!window->context.glx.window)
{
_glfwInputError(GLFW_PLATFORM_ERROR, "GLX: Failed to create window");
return GLFW_FALSE;
}
window->context.makeCurrent = makeContextCurrentGLX;
window->context.swapBuffers = swapBuffersGLX;
window->context.swapInterval = swapIntervalGLX;
window->context.extensionSupported = extensionSupportedGLX;
window->context.getProcAddress = getProcAddressGLX;
window->context.destroy = destroyContextGLX;
return GLFW_TRUE;
}
#undef setAttrib
// Returns the Visual and depth of the chosen GLXFBConfig
//
GLFWbool _glfwChooseVisualGLX(const _GLFWwndconfig* wndconfig,
const _GLFWctxconfig* ctxconfig,
const _GLFWfbconfig* fbconfig,
Visual** visual, int* depth)
{
GLXFBConfig native;
XVisualInfo* result;
if (!chooseGLXFBConfig(fbconfig, &native))
{
_glfwInputError(GLFW_FORMAT_UNAVAILABLE,
"GLX: Failed to find a suitable GLXFBConfig");
return GLFW_FALSE;
}
result = glXGetVisualFromFBConfig(_glfw.x11.display, native);
if (!result)
{
_glfwInputError(GLFW_PLATFORM_ERROR,
"GLX: Failed to retrieve Visual for GLXFBConfig");
return GLFW_FALSE;
}
*visual = result->visual;
*depth = result->depth;
XFree(result);
return GLFW_TRUE;
}
//////////////////////////////////////////////////////////////////////////
////// GLFW native API //////
//////////////////////////////////////////////////////////////////////////
GLFWAPI GLXContext glfwGetGLXContext(GLFWwindow* handle)
{
_GLFWwindow* window = (_GLFWwindow*) handle;
_GLFW_REQUIRE_INIT_OR_RETURN(NULL);
if (window->context.source != GLFW_NATIVE_CONTEXT_API)
{
_glfwInputError(GLFW_NO_WINDOW_CONTEXT, NULL);
return NULL;
}
return window->context.glx.handle;
}
GLFWAPI GLXWindow glfwGetGLXWindow(GLFWwindow* handle)
{
_GLFWwindow* window = (_GLFWwindow*) handle;
_GLFW_REQUIRE_INIT_OR_RETURN(None);
if (window->context.source != GLFW_NATIVE_CONTEXT_API)
{
_glfwInputError(GLFW_NO_WINDOW_CONTEXT, NULL);
return None;
}
return window->context.glx.window;
}
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