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 OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  22  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  23  * DEALINGS IN THE SOFTWARE.
  24  */
  25
  26 #include <stdio.h>
  27 #include <string.h>
  28 #include "util/u_debug.h"
  29 #include "util/u_memory.h"
  30 #include "state_tracker/drm_api.h"
  31 #include "egllog.h"
  32
  33 #include "native_x11.h"
  34 #include "x11_screen.h"
  35
  36 #define X11_PROBE_MAGIC 0x11980BE /* "X11PROBE" */
  37
  38 static struct drm_api *api;
  39
  40 static void
  41 x11_probe_destroy(struct native_probe *nprobe)
  42 {
  43    if (nprobe->data)
  44       free(nprobe->data);
  45    free(nprobe);
  46 }
  47
  48 struct native_probe *
  49 native_create_probe(EGLNativeDisplayType dpy)
  50 {
  51    struct native_probe *nprobe;
  52    struct x11_screen *xscr;
  53    int scr;
  54    const char *driver_name = NULL;
  55    Display *xdpy;
  56
  57    nprobe = CALLOC_STRUCT(native_probe);
  58    if (!nprobe)
  59       return NULL;
  60
  61    xdpy = dpy;
  62    if (!xdpy) {
  63       xdpy = XOpenDisplay(NULL);
  64       if (!xdpy) {
  65          free(nprobe);
  66          return NULL;
  67       }
  68    }
  69
  70    scr = DefaultScreen(xdpy);
  71    xscr = x11_screen_create(xdpy, scr);
  72    if (xscr) {
  73       if (x11_screen_support(xscr, X11_SCREEN_EXTENSION_DRI2)) {
  74          driver_name = x11_screen_probe_dri2(xscr, NULL, NULL);
  75          if (driver_name)
  76             nprobe->data = strdup(driver_name);
  77       }
  78
  79       x11_screen_destroy(xscr);
  80    }
  81
  82    if (xdpy != dpy)
  83       XCloseDisplay(xdpy);
  84
  85    nprobe->magic = X11_PROBE_MAGIC;
  86    nprobe->display = dpy;
  87
  88    nprobe->destroy = x11_probe_destroy;
  89
  90    return nprobe;
  91 }
  92
  93 enum native_probe_result
  94 native_get_probe_result(struct native_probe *nprobe)
  95 {
  96    if (!nprobe || nprobe->magic != X11_PROBE_MAGIC)
  97       return NATIVE_PROBE_UNKNOWN;
  98
  99    if (!api)
 100       api = drm_api_create();
 101
 102    /* this is a software driver */
 103    if (!api)
 104       return NATIVE_PROBE_SUPPORTED;
 105
 106    /* the display does not support DRI2 or the driver mismatches */
 107    if (!nprobe->data || strcmp(api->name, (const char *) nprobe->data) != 0)
 108       return NATIVE_PROBE_FALLBACK;
 109
 110    return NATIVE_PROBE_EXACT;
 111 }
 112
 113 const char *
 114 native_get_name(void)
 115 {
 116    static char x11_name[32];
 117
 118    if (!api)
 119       api = drm_api_create();
 120
 121    if (api)
 122       snprintf(x11_name, sizeof(x11_name), "X11/%s", api->name);
 123    else
 124       snprintf(x11_name, sizeof(x11_name), "X11");
 125
 126    return x11_name;
 127 }
 128
 129 struct native_display *
 130 native_create_display(EGLNativeDisplayType dpy,
 131                       struct native_event_handler *event_handler)
 132 {
 133    struct native_display *ndpy = NULL;
 134    boolean force_sw;
 135
 136    if (!api)
 137       api = drm_api_create();
 138
 139    force_sw = debug_get_bool_option("EGL_SOFTWARE", FALSE);
 140    if (api && !force_sw) {
 141       ndpy = x11_create_dri2_display(dpy, event_handler, api);
 142    }
 143
 144    if (!ndpy) {
 145       EGLint level = (force_sw) ? _EGL_INFO : _EGL_WARNING;
 146
 147       _eglLog(level, "use software fallback");
 148       ndpy = x11_create_ximage_display(dpy, event_handler);
 149    }
 150
 151    return ndpy;
 152 }