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 <string.h>
  27 #include "util/u_debug.h"
  28 #include "util/u_memory.h"
  29 #include "util/u_string.h"
  30 #include "egllog.h"
  31
  32 #include "native_x11.h"
  33 #include "x11_screen.h"
  34
  35 #include "state_tracker/drm_driver.h"
  36
  37 #define X11_PROBE_MAGIC 0x11980BE /* "X11PROBE" */
  38
  39 static void
  40 x11_probe_destroy(struct native_probe *nprobe)
  41 {
  42    if (nprobe->data)
  43       FREE(nprobe->data);
  44    FREE(nprobe);
  45 }
  46
  47 static struct native_probe *
  48 x11_create_probe(void *dpy)
  49 {
  50    struct native_probe *nprobe;
  51    struct x11_screen *xscr;
  52    int scr;
  53    const char *driver_name = NULL;
  54    Display *xdpy;
  55
  56    nprobe = CALLOC_STRUCT(native_probe);
  57    if (!nprobe)
  58       return NULL;
  59
  60    xdpy = dpy;
  61    if (!xdpy) {
  62       xdpy = XOpenDisplay(NULL);
  63       if (!xdpy) {
  64          FREE(nprobe);
  65          return NULL;
  66       }
  67    }
  68
  69    scr = DefaultScreen(xdpy);
  70    xscr = x11_screen_create(xdpy, scr);
  71    if (xscr) {
  72       if (x11_screen_support(xscr, X11_SCREEN_EXTENSION_DRI2)) {
  73          driver_name = x11_screen_probe_dri2(xscr, NULL, NULL);
  74          if (driver_name)
  75             nprobe->data = strdup(driver_name);
  76       }
  77
  78       x11_screen_destroy(xscr);
  79    }
  80
  81    if (xdpy != dpy)
  82       XCloseDisplay(xdpy);
  83
  84    nprobe->magic = X11_PROBE_MAGIC;
  85    nprobe->display = dpy;
  86
  87    nprobe->destroy = x11_probe_destroy;
  88
  89    return nprobe;
  90 }
  91
  92 static enum native_probe_result
  93 x11_get_probe_result(struct native_probe *nprobe)
  94 {
  95    if (!nprobe || nprobe->magic != X11_PROBE_MAGIC)
  96       return NATIVE_PROBE_UNKNOWN;
  97
  98    /* this is a software driver */
  99    if (!driver_descriptor.create_screen)
 100       return NATIVE_PROBE_SUPPORTED;
 101
 102    /* the display does not support DRI2 or the driver mismatches */
 103    if (!nprobe->data || strcmp(driver_descriptor.name, (const char *) nprobe->data) != 0)
 104       return NATIVE_PROBE_FALLBACK;
 105
 106    return NATIVE_PROBE_EXACT;
 107 }
 108
 109 static struct native_display *
 110 native_create_display(void *dpy, struct native_event_handler *event_handler)
 111 {
 112    struct native_display *ndpy = NULL;
 113    boolean force_sw;
 114
 115    force_sw = debug_get_bool_option("EGL_SOFTWARE", FALSE);
 116    if (!driver_descriptor.create_screen)
 117       force_sw = TRUE;
 118
 119    if (!force_sw) {
 120       ndpy = x11_create_dri2_display((Display *) dpy, event_handler);
 121    }
 122
 123    if (!ndpy) {
 124       EGLint level = (force_sw) ? _EGL_INFO : _EGL_WARNING;
 125
 126       _eglLog(level, "use software fallback");
 127       ndpy = x11_create_ximage_display((Display *) dpy, event_handler);
 128    }
 129
 130    return ndpy;
 131 }
 132
 133 static void
 134 x11_init_platform(struct native_platform *nplat)
 135 {
 136    static char x11_name[32];
 137
 138    if (nplat->name)
 139       return;
 140
 141    util_snprintf(x11_name, sizeof(x11_name), "X11/%s", driver_descriptor.name);
 142
 143    nplat->name = x11_name;
 144    nplat->create_probe = x11_create_probe;
 145    nplat->get_probe_result = x11_get_probe_result;
 146    nplat->create_display = native_create_display;
 147 }
 148
 149 static struct native_platform x11_platform;
 150
 151 const struct native_platform *
 152 native_get_platform(void)
 153 {
 154    x11_init_platform(&x11_platform);
 155    return &x11_platform;
 156 }