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1 /*
2  * (C) Copyright IBM Corporation 2004
3  * All Rights Reserved.
4  *
5  * Permission is hereby granted, free of charge, to any person obtaining a
6  * copy of this software and associated documentation files (the "Software"),
7  * to deal in the Software without restriction, including without limitation
8  * on the rights to use, copy, modify, merge, publish, distribute, sub
9  * license, and/or sell copies of the Software, and to permit persons to whom
10  * the Software is furnished to do so, subject to the following conditions:
11  *
12  * The above copyright notice and this permission notice (including the next
13  * paragraph) shall be included in all copies or substantial portions of the
14  * Software.
15  *
16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.  IN NO EVENT SHALL
19  * IBM AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
22  * DEALINGS IN THE SOFTWARE.
23  */
24 
25 /**
26  * \file glx_query.c
27  * Generic utility functions to query internal data from the server.
28  *
29  * \author Ian Romanick <idr@us.ibm.com>
30  */
31 
32 #include "glxclient.h"
33 
34 # include <X11/Xlib-xcb.h>
35 # include <xcb/xcb.h>
36 # include <xcb/glx.h>
37 
38 
39 /**
40  * Exchange a protocol request for glXQueryServerString.
41  */
42 char *
__glXQueryServerString(Display * dpy,int opcode,CARD32 screen,CARD32 name)43 __glXQueryServerString(Display * dpy, int opcode, CARD32 screen, CARD32 name)
44 {
45    xcb_connection_t *c = XGetXCBConnection(dpy);
46    xcb_glx_query_server_string_reply_t *reply =
47       xcb_glx_query_server_string_reply(c,
48                                         xcb_glx_query_server_string(c,
49                                                                     screen,
50                                                                     name),
51                                         NULL);
52 
53    /* The spec doesn't mention this, but the Xorg server replies with
54     * a string already terminated with '\0'. */
55    uint32_t len = xcb_glx_query_server_string_string_length(reply);
56    char *buf = malloc(len);
57    memcpy(buf, xcb_glx_query_server_string_string(reply), len);
58    free(reply);
59 
60    return buf;
61 }
62 
63 /**
64  * Exchange a protocol request for glGetString.
65  */
66 char *
__glXGetString(Display * dpy,int opcode,CARD32 contextTag,CARD32 name)67 __glXGetString(Display * dpy, int opcode, CARD32 contextTag, CARD32 name)
68 {
69    xcb_connection_t *c = XGetXCBConnection(dpy);
70    xcb_glx_get_string_reply_t *reply = xcb_glx_get_string_reply(c,
71                                                                 xcb_glx_get_string
72                                                                 (c,
73                                                                  contextTag,
74                                                                  name),
75                                                                 NULL);
76 
77    /* The spec doesn't mention this, but the Xorg server replies with
78     * a string already terminated with '\0'. */
79    uint32_t len = xcb_glx_get_string_string_length(reply);
80    char *buf = malloc(len);
81    memcpy(buf, xcb_glx_get_string_string(reply), len);
82    free(reply);
83 
84    return buf;
85 }
86 
87