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105 lines
3.3 KiB
105 lines
3.3 KiB
/*
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* Copyright © 2013 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#include <assert.h>
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#include <string.h>
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#include <stdio.h>
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#include "dispatch_common.h"
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/**
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* If we can determine the GLX version from the current context, then
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* return that, otherwise return a version that will just send us on
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* to dlsym() or get_proc_address().
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*/
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int
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epoxy_conservative_glx_version(void)
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{
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Display *dpy = glXGetCurrentDisplay();
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GLXContext ctx = glXGetCurrentContext();
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int screen;
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if (!dpy || !ctx)
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return 14;
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glXQueryContext(dpy, ctx, GLX_SCREEN, &screen);
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return epoxy_glx_version(dpy, screen);
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}
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PUBLIC int
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epoxy_glx_version(Display *dpy, int screen)
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{
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int server_major, server_minor;
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int client_major, client_minor;
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int server, client;
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const char *version_string;
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int ret;
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version_string = glXQueryServerString(dpy, screen, GLX_VERSION);
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ret = sscanf(version_string, "%d.%d", &server_major, &server_minor);
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assert(ret == 2);
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server = server_major * 10 + server_minor;
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version_string = glXGetClientString(dpy, GLX_VERSION);
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ret = sscanf(version_string, "%d.%d", &client_major, &client_minor);
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assert(ret == 2);
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client = client_major * 10 + client_minor;
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if (client < server)
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return client;
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else
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return server;
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}
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/**
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* If we can determine the GLX extension support from the current
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* context, then return that, otherwise give the answer that will just
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* send us on to get_proc_address().
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*/
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bool
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epoxy_conservative_has_glx_extension(const char *ext)
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{
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Display *dpy = glXGetCurrentDisplay();
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GLXContext ctx = glXGetCurrentContext();
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int screen;
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if (!dpy || !ctx)
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return true;
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glXQueryContext(dpy, ctx, GLX_SCREEN, &screen);
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return epoxy_has_glx_extension(dpy, screen, ext);
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}
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PUBLIC bool
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epoxy_has_glx_extension(Display *dpy, int screen, const char *ext)
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{
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/* No, you can't just use glXGetClientString or
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* glXGetServerString() here. Those each tell you about one half
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* of what's needed for an extension to be supported, and
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* glXQueryExtensionsString() is what gives you the intersection
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* of the two.
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*/
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return epoxy_extension_in_string(glXQueryExtensionsString(dpy, screen), ext);
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}
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