src/glx/glx_query.c

   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 *
  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    if (!reply)
  54       return NULL;
  55
  56    /* The spec doesn't mention this, but the Xorg server replies with
  57     * a string already terminated with '\0'. */
  58    uint32_t len = xcb_glx_query_server_string_string_length(reply);
  59    char *buf = malloc(len);
  60    memcpy(buf, xcb_glx_query_server_string_string(reply), len);
  61    free(reply);
  62
  63    return buf;
  64 }
  65
  66 /**
  67  * Exchange a protocol request for glGetString.
  68  */
  69 char *
  70 __glXGetString(Display * dpy, int opcode, CARD32 contextTag, CARD32 name)
  71 {
  72    xcb_connection_t *c = XGetXCBConnection(dpy);
  73    xcb_glx_get_string_reply_t *reply = xcb_glx_get_string_reply(c,
  74                                                                 xcb_glx_get_string
  75                                                                 (c,
  76                                                                  contextTag,
  77                                                                  name),
  78                                                                 NULL);
  79
  80    if (!reply)
  81       return NULL;
  82
  83    /* The spec doesn't mention this, but the Xorg server replies with
  84     * a string already terminated with '\0'. */
  85    uint32_t len = xcb_glx_get_string_string_length(reply);
  86    char *buf = malloc(len);
  87    memcpy(buf, xcb_glx_get_string_string(reply), len);
  88    free(reply);
  89
  90    return buf;
  91 }
  92