src/gallium/state_trackers/egl/x11/native_x11.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  7.8
   4  *
   5  * Copyright (C) 2009-2010 Chia-I Wu <olv@0xlab.org>
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included
  15  * in all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  21  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  22  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  23  */
  24
  25 #include <string.h>
  26 #include "util/u_debug.h"
  27 #include "util/u_memory.h"
  28 #include "state_tracker/drm_api.h"
  29 #include "egllog.h"
  30
  31 #include "native_x11.h"
  32 #include "x11_screen.h"
  33
  34 #define X11_PROBE_MAGIC 0x11980BE /* "X11PROBE" */
  35
  36 static struct drm_api *api;
  37
  38 static void
  39 x11_probe_destroy(struct native_probe *nprobe)
  40 {
  41    if (nprobe->data)
  42       free(nprobe->data);
  43    free(nprobe);
  44 }
  45
  46 struct native_probe *
  47 native_create_probe(EGLNativeDisplayType dpy)
  48 {
  49    struct native_probe *nprobe;
  50    struct x11_screen *xscr;
  51    int scr;
  52    const char *driver_name = NULL;
  53    Display *xdpy;
  54
  55    nprobe = CALLOC_STRUCT(native_probe);
  56    if (!nprobe)
  57       return NULL;
  58
  59    xdpy = dpy;
  60    if (!xdpy) {
  61       xdpy = XOpenDisplay(NULL);
  62       if (!xdpy) {
  63          free(nprobe);
  64          return NULL;
  65       }
  66    }
  67
  68    scr = DefaultScreen(xdpy);
  69    xscr = x11_screen_create(xdpy, scr);
  70    if (xscr) {
  71       if (x11_screen_support(xscr, X11_SCREEN_EXTENSION_DRI2)) {
  72          driver_name = x11_screen_probe_dri2(xscr);
  73          if (driver_name)
  74             nprobe->data = strdup(driver_name);
  75       }
  76
  77       x11_screen_destroy(xscr);
  78    }
  79
  80    if (xdpy != dpy)
  81       XCloseDisplay(xdpy);
  82
  83    nprobe->magic = X11_PROBE_MAGIC;
  84    nprobe->display = dpy;
  85
  86    nprobe->destroy = x11_probe_destroy;
  87
  88    return nprobe;
  89 }
  90
  91 enum native_probe_result
  92 native_get_probe_result(struct native_probe *nprobe)
  93 {
  94    if (!nprobe || nprobe->magic != X11_PROBE_MAGIC)
  95       return NATIVE_PROBE_UNKNOWN;
  96
  97    if (!api)
  98       api = drm_api_create();
  99
 100    /* this is a software driver */
 101    if (!api)
 102       return NATIVE_PROBE_SUPPORTED;
 103
 104    /* the display does not support DRI2 or the driver mismatches */
 105    if (!nprobe->data || strcmp(api->name, (const char *) nprobe->data) != 0)
 106       return NATIVE_PROBE_FALLBACK;
 107
 108    return NATIVE_PROBE_EXACT;
 109 }
 110
 111 const char *
 112 native_get_name(void)
 113 {
 114    static char x11_name[32];
 115
 116    if (!api)
 117       api = drm_api_create();
 118
 119    if (api)
 120       snprintf(x11_name, sizeof(x11_name), "X11/%s", api->name);
 121    else
 122       snprintf(x11_name, sizeof(x11_name), "X11");
 123
 124    return x11_name;
 125 }
 126
 127 struct native_display *
 128 native_create_display(EGLNativeDisplayType dpy)
 129 {
 130    struct native_display *ndpy = NULL;
 131    boolean force_sw;
 132
 133    if (!api)
 134       api = drm_api_create();
 135
 136    force_sw = debug_get_bool_option("EGL_SOFTWARE", FALSE);
 137    if (api && !force_sw) {
 138       ndpy = x11_create_dri2_display(dpy, api);
 139    }
 140
 141    if (!ndpy) {
 142       EGLint level = (force_sw) ? _EGL_INFO : _EGL_WARNING;
 143
 144       _eglLog(level, "use software fallback");
 145       ndpy = x11_create_ximage_display(dpy, TRUE);
 146    }
 147
 148    return ndpy;
 149 }