1/**************************************************************************
2 *
3 * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
4 * Copyright 2009-2010 Chia-I Wu <olvaffe@gmail.com>
5 * Copyright 2010-2011 LunarG, Inc.
6 * All Rights Reserved.
7 *
8 * Permission is hereby granted, free of charge, to any person obtaining a
9 * copy of this software and associated documentation files (the
10 * "Software"), to deal in the Software without restriction, including
11 * without limitation the rights to use, copy, modify, merge, publish,
12 * distribute, sub license, and/or sell copies of the Software, and to
13 * permit persons to whom the Software is furnished to do so, subject to
14 * the following conditions:
15 *
16 * The above copyright notice and this permission notice (including the
17 * next paragraph) shall be included in all copies or substantial portions
18 * of the Software.
19 *
20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
21 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
23 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
24 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
25 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
26 * DEALINGS IN THE SOFTWARE.
27 *
28 **************************************************************************/
29
30
31/**
32 * Small/misc EGL functions
33 */
34
35
36#include <assert.h>
37#include <string.h>
38#include "eglcurrent.h"
39#include "eglmisc.h"
40#include "egldisplay.h"
41#include "egldriver.h"
42#include "eglstring.h"
43
44
45/**
46 * Copy the extension into the string and update the string pointer.
47 */
48static EGLint
49_eglAppendExtension(char **str, const char *ext)
50{
51   char *s = *str;
52   size_t len = strlen(ext);
53
54   if (s) {
55      memcpy(s, ext, len);
56      s[len++] = ' ';
57      s[len] = '\0';
58
59      *str += len;
60   }
61   else {
62      len++;
63   }
64
65   return (EGLint) len;
66}
67
68
69/**
70 * Examine the individual extension enable/disable flags and recompute
71 * the driver's Extensions string.
72 */
73static void
74_eglUpdateExtensionsString(_EGLDisplay *dpy)
75{
76#define _EGL_CHECK_EXTENSION(ext)                                          \
77   do {                                                                    \
78      if (dpy->Extensions.ext) {                                           \
79         _eglAppendExtension(&exts, "EGL_" #ext);                          \
80         assert(exts <= dpy->ExtensionsString + _EGL_MAX_EXTENSIONS_LEN);  \
81      }                                                                    \
82   } while (0)
83
84   char *exts = dpy->ExtensionsString;
85
86   if (exts[0])
87      return;
88
89   _EGL_CHECK_EXTENSION(MESA_screen_surface);
90   _EGL_CHECK_EXTENSION(MESA_copy_context);
91   _EGL_CHECK_EXTENSION(MESA_drm_display);
92   _EGL_CHECK_EXTENSION(MESA_drm_image);
93
94   _EGL_CHECK_EXTENSION(WL_bind_wayland_display);
95
96   _EGL_CHECK_EXTENSION(KHR_image_base);
97   _EGL_CHECK_EXTENSION(KHR_image_pixmap);
98   if (dpy->Extensions.KHR_image_base && dpy->Extensions.KHR_image_pixmap)
99      _eglAppendExtension(&exts, "EGL_KHR_image");
100
101   _EGL_CHECK_EXTENSION(KHR_vg_parent_image);
102   _EGL_CHECK_EXTENSION(KHR_gl_texture_2D_image);
103   _EGL_CHECK_EXTENSION(KHR_gl_texture_cubemap_image);
104   _EGL_CHECK_EXTENSION(KHR_gl_texture_3D_image);
105   _EGL_CHECK_EXTENSION(KHR_gl_renderbuffer_image);
106
107   _EGL_CHECK_EXTENSION(KHR_reusable_sync);
108   _EGL_CHECK_EXTENSION(KHR_fence_sync);
109
110   _EGL_CHECK_EXTENSION(KHR_surfaceless_context);
111   _EGL_CHECK_EXTENSION(KHR_create_context);
112
113   _EGL_CHECK_EXTENSION(NOK_swap_region);
114   _EGL_CHECK_EXTENSION(NOK_texture_from_pixmap);
115
116   _EGL_CHECK_EXTENSION(ANDROID_image_native_buffer);
117
118   _EGL_CHECK_EXTENSION(EXT_create_context_robustness);
119
120   _EGL_CHECK_EXTENSION(NV_post_sub_buffer);
121#undef _EGL_CHECK_EXTENSION
122}
123
124
125static void
126_eglUpdateAPIsString(_EGLDisplay *dpy)
127{
128   char *apis = dpy->ClientAPIsString;
129
130   if (apis[0] || !dpy->ClientAPIs)
131      return;
132
133   if (dpy->ClientAPIs & EGL_OPENGL_BIT)
134      strcat(apis, "OpenGL ");
135
136   if (dpy->ClientAPIs & EGL_OPENGL_ES_BIT)
137      strcat(apis, "OpenGL_ES ");
138
139   if (dpy->ClientAPIs & EGL_OPENGL_ES2_BIT)
140      strcat(apis, "OpenGL_ES2 ");
141
142   if (dpy->ClientAPIs & EGL_OPENVG_BIT)
143      strcat(apis, "OpenVG ");
144
145   assert(strlen(apis) < sizeof(dpy->ClientAPIsString));
146}
147
148
149const char *
150_eglQueryString(_EGLDriver *drv, _EGLDisplay *dpy, EGLint name)
151{
152   (void) drv;
153
154   switch (name) {
155   case EGL_VENDOR:
156      return _EGL_VENDOR_STRING;
157   case EGL_VERSION:
158      _eglsnprintf(dpy->VersionString, sizeof(dpy->VersionString),
159              "%d.%d (%s)", dpy->VersionMajor, dpy->VersionMinor,
160              dpy->Driver->Name);
161      return dpy->VersionString;
162   case EGL_EXTENSIONS:
163      _eglUpdateExtensionsString(dpy);
164      return dpy->ExtensionsString;
165   case EGL_CLIENT_APIS:
166      _eglUpdateAPIsString(dpy);
167      return dpy->ClientAPIsString;
168   default:
169      _eglError(EGL_BAD_PARAMETER, "eglQueryString");
170      return NULL;
171   }
172}
173