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/*
* Copyright © 2011 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 <string.h>
#include <ctype.h>
#include "glxclient.h"
#include <xcb/glx.h>
#include <X11/Xlib-xcb.h>
_X_HIDDEN void
__glX_send_client_info(struct glx_display *glx_dpy)
{
const unsigned ext_length = strlen("GLX_ARB_create_context");
const unsigned prof_length = strlen("_profile");
char *gl_extension_string;
int gl_extension_length;
xcb_connection_t *c;
Bool any_screen_has_ARB_create_context = False;
Bool any_screen_has_ARB_create_context_profile = False;
unsigned i;
#ifdef HAVE_XCB_GLX_CREATE_CONTEXT
static const uint32_t gl_versions[] = {
1, 4,
};
static const uint32_t gl_versions_profiles[] = {
1, 4, 0x00000000,
};
static const char glx_extensions[] =
"GLX_ARB_create_context GLX_ARB_create_context_profile";
#endif
/* There are three possible flavors of the client info structure that the
* client could send to the server. The version sent depends on the
* combination of GLX versions and extensions supported by the client and
* the server.
*
* Server supports Client sends
* ----------------------------------------------------------------------
* GLX version = 1.0 Nothing.
*
* GLX version >= 1.1 struct GLXClientInfo
*
* GLX version >= 1.4 and
* GLX_ARB_create_context struct glXSetClientInfoARB
*
* GLX version >= 1.4 and
* GLX_ARB_create_context_profile struct glXSetClientInfo2ARB
*
* GLX_ARB_create_context and GLX_ARB_create_context_profile use FBConfigs,
* and these only exist in GLX 1.4 or with GLX_SGIX_fbconfig. I can't
* imagine an implementation that supports GLX_SGIX_fbconfig and
* GLX_ARB_create_context but not GLX 1.4. Making GLX 1.4 a hard
* requirement in this case does not seem like a limitation.
*
* This library currently only supports struct GLXClientInfo.
*/
if (glx_dpy->majorVersion == 1 && glx_dpy->minorVersion == 0)
return;
/* Determine whether any screen on the server supports either of the
* create-context extensions.
*/
for (i = 0; i < ScreenCount(glx_dpy->dpy); i++) {
struct glx_screen *src = glx_dpy->screens[i];
const char *haystack = src->serverGLXexts;
while (haystack != NULL) {
char *match = strstr(haystack, "GLX_ARB_create_context");
if (match == NULL)
break;
match += ext_length;
switch (match[0]) {
case '\0':
case ' ':
any_screen_has_ARB_create_context = True;
break;
case '_':
if (strncmp(match, "_profile", prof_length) == 0
&& (match[prof_length] == '\0'
|| match[prof_length] == ' ')) {
any_screen_has_ARB_create_context_profile = True;
match += prof_length;
}
break;
}
haystack = match;
}
}
gl_extension_string = __glXGetClientGLExtensionString();
gl_extension_length = strlen(gl_extension_string) + 1;
c = XGetXCBConnection(glx_dpy->dpy);
/* Depending on the GLX verion and the available extensions on the server,
* send the correct "flavor" of protocol to the server.
*
* THE ORDER IS IMPORTANT. We want to send the most recent version of the
* protocol that the server can support.
*/
#ifdef HAVE_XCB_GLX_CREATE_CONTEXT
if (glx_dpy->majorVersion == 1 && glx_dpy->minorVersion == 4
&& any_screen_has_ARB_create_context_profile) {
xcb_glx_set_client_info_2arb(c,
GLX_MAJOR_VERSION, GLX_MINOR_VERSION,
sizeof(gl_versions_profiles)
/ (3 * sizeof(gl_versions_profiles[0])),
gl_extension_length,
strlen(glx_extensions) + 1,
gl_versions_profiles,
gl_extension_string,
glx_extensions);
} else if (glx_dpy->majorVersion == 1 && glx_dpy->minorVersion == 4
&& any_screen_has_ARB_create_context) {
xcb_glx_set_client_info_arb(c,
GLX_MAJOR_VERSION, GLX_MINOR_VERSION,
sizeof(gl_versions)
/ (2 * sizeof(gl_versions[0])),
gl_extension_length,
strlen(glx_extensions) + 1,
gl_versions,
gl_extension_string,
glx_extensions);
} else
#endif
{
xcb_glx_client_info(c,
GLX_MAJOR_VERSION, GLX_MINOR_VERSION,
gl_extension_length,
gl_extension_string);
}
Xfree(gl_extension_string);
}
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