src/egl/main/eglmisc.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28
  29 /**
  30  * Small/misc EGL functions
  31  */
  32
  33
  34 #include <assert.h>
  35 #include <string.h>
  36 #include "eglglobals.h"
  37 #include "eglmisc.h"
  38
  39
  40 /**
  41  * Examine the individual extension enable/disable flags and recompute
  42  * the driver's Extensions string.
  43  */
  44 static void
  45 _eglUpdateExtensionsString(_EGLDriver *drv)
  46 {
  47    drv->Extensions.String[0] = 0;
  48
  49    if (drv->Extensions.MESA_screen_surface)
  50       strcat(drv->Extensions.String, "EGL_MESA_screen_surface ");
  51    if (drv->Extensions.MESA_copy_context)
  52       strcat(drv->Extensions.String, "EGL_MESA_copy_context ");
  53    assert(strlen(drv->Extensions.String) < _EGL_MAX_EXTENSIONS_LEN);
  54 }
  55
  56
  57 #if 0 /* prototype code */
  58
  59 #include <dlfcn.h>
  60
  61 static EGLint
  62 _eglFindAPIs_by_sym(void)
  63 {
  64    EGLint mask = 0x0;
  65
  66    if (dlsym(NULL, "glBegin"))
  67       mask |= EGL_OPENGL_BIT;
  68    if (dlsym(NULL, "glGetFixedv"))
  69       mask |= EGL_OPENGL_ES_BIT;
  70    if (dlsym(NULL, "vgSetf"))
  71       mask |= EGL_OPENVG_BIT;
  72
  73    return mask;
  74 }
  75
  76 static EGLint
  77 _eglFindAPIs_by_lib(void)
  78 {
  79    EGLint mask = 0x0;
  80    int flag = RTLD_NOW;
  81    void *h;
  82
  83    if ((h = dlopen("libGLESv1_CM.so", flag))) {
  84       dlclose(h);
  85       mask |= EGL_OPENGL_ES_BIT;
  86    }
  87
  88    if ((h = dlopen("libGLESv2.so", flag))) {
  89       dlclose(h);
  90       mask |= EGL_OPENGL_ES2_BIT;
  91    }
  92
  93    if ((h = dlopen("libGL.so", flag))) {
  94       dlclose(h);
  95       mask |= EGL_OPENGL_BIT;
  96    }
  97
  98    if ((h = dlopen("libOpenVG.so", flag))) {
  99       dlclose(h);
 100       mask |= EGL_OPENVG_BIT;
 101    }
 102
 103    return mask;
 104 }
 105
 106 #endif
 107
 108
 109 static void
 110 _eglUpdateAPIsString(_EGLDriver *drv)
 111 {
 112    _eglGlobal.ClientAPIs[0] = 0;
 113
 114    if (_eglGlobal.ClientAPIsMask & EGL_OPENGL_BIT)
 115       strcat(_eglGlobal.ClientAPIs, "OpenGL ");
 116
 117    if (_eglGlobal.ClientAPIsMask & EGL_OPENGL_ES_BIT)
 118       strcat(_eglGlobal.ClientAPIs, "OpenGL_ES ");
 119
 120    if (_eglGlobal.ClientAPIsMask & EGL_OPENGL_ES2_BIT)
 121       strcat(_eglGlobal.ClientAPIs, "OpenGL_ES2 ");
 122
 123    if (_eglGlobal.ClientAPIsMask & EGL_OPENVG_BIT)
 124       strcat(_eglGlobal.ClientAPIs, "OpenVG ");
 125
 126    assert(strlen(_eglGlobal.ClientAPIs) < sizeof(_eglGlobal.ClientAPIs));
 127 }
 128
 129
 130
 131 const char *
 132 _eglQueryString(_EGLDriver *drv, EGLDisplay dpy, EGLint name)
 133 {
 134    (void) drv;
 135    (void) dpy;
 136    switch (name) {
 137    case EGL_VENDOR:
 138       return _EGL_VENDOR_STRING;
 139    case EGL_VERSION:
 140       return drv->Version;
 141    case EGL_EXTENSIONS:
 142       _eglUpdateExtensionsString(drv);
 143       return drv->Extensions.String;
 144 #ifdef EGL_VERSION_1_2
 145    case EGL_CLIENT_APIS:
 146       _eglUpdateAPIsString(drv);
 147       return _eglGlobal.ClientAPIs;
 148 #endif
 149    default:
 150       _eglError(EGL_BAD_PARAMETER, "eglQueryString");
 151       return NULL;
 152    }
 153 }
 154
 155
 156 EGLBoolean
 157 _eglWaitGL(_EGLDriver *drv, EGLDisplay dpy)
 158 {
 159    /* just a placeholder */
 160    (void) drv;
 161    (void) dpy;
 162    return EGL_TRUE;
 163 }
 164
 165
 166 EGLBoolean
 167 _eglWaitNative(_EGLDriver *drv, EGLDisplay dpy, EGLint engine)
 168 {
 169    /* just a placeholder */
 170    (void) drv;
 171    (void) dpy;
 172    switch (engine) {
 173    case EGL_CORE_NATIVE_ENGINE:
 174       break;
 175    default:
 176       _eglError(EGL_BAD_PARAMETER, "eglWaitNative(engine)");
 177       return EGL_FALSE;
 178    }
 179
 180    return EGL_TRUE;
 181 }