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/*
* Copyright © 2013 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#include <assert.h>
#include <string.h>
#include <stdio.h>
#include "dispatch_common.h"
/**
* If we can determine the GLX version from the current context, then
* return that, otherwise return a version that will just send us on
* to dlsym() or get_proc_address().
*/
int
epoxy_conservative_glx_version(void)
{
Display *dpy = glXGetCurrentDisplay();
GLXContext ctx = glXGetCurrentContext();
int screen;
if (!dpy || !ctx)
return 14;
glXQueryContext(dpy, ctx, GLX_SCREEN, &screen);
return epoxy_glx_version(dpy, screen);
}
int
epoxy_glx_version(Display *dpy, int screen)
{
int server_major, server_minor;
int client_major, client_minor;
int server, client;
const char *version_string;
int ret;
version_string = glXQueryServerString(dpy, screen, GLX_VERSION);
if (!version_string)
return 0;
ret = sscanf(version_string, "%d.%d", &server_major, &server_minor);
assert(ret == 2);
server = server_major * 10 + server_minor;
version_string = glXGetClientString(dpy, GLX_VERSION);
if (!version_string)
return 0;
ret = sscanf(version_string, "%d.%d", &client_major, &client_minor);
assert(ret == 2);
client = client_major * 10 + client_minor;
if (client < server)
return client;
else
return server;
}
/**
* If we can determine the GLX extension support from the current
* context, then return that, otherwise give the answer that will just
* send us on to get_proc_address().
*/
bool
epoxy_conservative_has_glx_extension(const char *ext)
{
Display *dpy = glXGetCurrentDisplay();
GLXContext ctx = glXGetCurrentContext();
int screen;
if (!dpy || !ctx)
return true;
glXQueryContext(dpy, ctx, GLX_SCREEN, &screen);
return epoxy_has_glx_extension(dpy, screen, ext);
}
bool
epoxy_has_glx_extension(Display *dpy, int screen, const char *ext)
{
/* No, you can't just use glXGetClientString or
* glXGetServerString() here. Those each tell you about one half
* of what's needed for an extension to be supported, and
* glXQueryExtensionsString() is what gives you the intersection
* of the two.
*/
return epoxy_extension_in_string(glXQueryExtensionsString(dpy, screen), ext);
}
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