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 "eglcurrent.h"
  37 #include "eglmisc.h"
  38 #include "egldisplay.h"
  39
  40
  41 /**
  42  * Examine the individual extension enable/disable flags and recompute
  43  * the driver's Extensions string.
  44  */
  45 static void
  46 _eglUpdateExtensionsString(_EGLDisplay *dpy)
  47 {
  48    char *exts = dpy->Extensions.String;
  49
  50    if (exts[0])
  51       return;
  52
  53    if (dpy->Extensions.MESA_screen_surface)
  54       strcat(exts, "EGL_MESA_screen_surface ");
  55    if (dpy->Extensions.MESA_copy_context)
  56       strcat(exts, "EGL_MESA_copy_context ");
  57
  58    if (dpy->Extensions.KHR_image_base)
  59       strcat(exts, "EGL_KHR_image_base ");
  60    if (dpy->Extensions.KHR_image_pixmap)
  61       strcat(exts, "EGL_KHR_image_pixmap ");
  62    if (dpy->Extensions.KHR_image_base && dpy->Extensions.KHR_image_pixmap)
  63       strcat(exts, "EGL_KHR_image ");
  64
  65    assert(strlen(exts) < _EGL_MAX_EXTENSIONS_LEN);
  66 }
  67
  68
  69 static void
  70 _eglUpdateAPIsString(_EGLDisplay *dpy)
  71 {
  72    char *apis = dpy->ClientAPIs;
  73
  74    if (apis[0] || !dpy->ClientAPIsMask)
  75       return;
  76
  77    if (dpy->ClientAPIsMask & EGL_OPENGL_BIT)
  78       strcat(apis, "OpenGL ");
  79
  80    if (dpy->ClientAPIsMask & EGL_OPENGL_ES_BIT)
  81       strcat(apis, "OpenGL_ES ");
  82
  83    if (dpy->ClientAPIsMask & EGL_OPENGL_ES2_BIT)
  84       strcat(apis, "OpenGL_ES2 ");
  85
  86    if (dpy->ClientAPIsMask & EGL_OPENVG_BIT)
  87       strcat(apis, "OpenVG ");
  88
  89    assert(strlen(apis) < sizeof(dpy->ClientAPIs));
  90 }
  91
  92
  93 const char *
  94 _eglQueryString(_EGLDriver *drv, _EGLDisplay *dpy, EGLint name)
  95 {
  96    (void) drv;
  97    (void) dpy;
  98    switch (name) {
  99    case EGL_VENDOR:
 100       return _EGL_VENDOR_STRING;
 101    case EGL_VERSION:
 102       return dpy->Version;
 103    case EGL_EXTENSIONS:
 104       _eglUpdateExtensionsString(dpy);
 105       return dpy->Extensions.String;
 106 #ifdef EGL_VERSION_1_2
 107    case EGL_CLIENT_APIS:
 108       _eglUpdateAPIsString(dpy);
 109       return dpy->ClientAPIs;
 110 #endif
 111    default:
 112       _eglError(EGL_BAD_PARAMETER, "eglQueryString");
 113       return NULL;
 114    }
 115 }
 116
 117
 118 EGLBoolean
 119 _eglWaitClient(_EGLDriver *drv, _EGLDisplay *dpy, _EGLContext *ctx)
 120 {
 121    /* just a placeholder */
 122    (void) drv;
 123    (void) dpy;
 124    (void) ctx;
 125    return EGL_TRUE;
 126 }
 127
 128
 129 EGLBoolean
 130 _eglWaitNative(_EGLDriver *drv, _EGLDisplay *dpy, EGLint engine)
 131 {
 132    /* just a placeholder */
 133    (void) drv;
 134    (void) dpy;
 135    switch (engine) {
 136    case EGL_CORE_NATIVE_ENGINE:
 137       break;
 138    default:
 139       _eglError(EGL_BAD_PARAMETER, "eglWaitNative(engine)");
 140       return EGL_FALSE;
 141    }
 142
 143    return EGL_TRUE;
 144 }