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 */
48 static EGLint
_eglAppendExtension(char ** str,const char * ext)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 */
73 static void
_eglUpdateExtensionsString(_EGLDisplay * dpy)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
125 static void
_eglUpdateAPIsString(_EGLDisplay * dpy)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
149 const char *
_eglQueryString(_EGLDriver * drv,_EGLDisplay * dpy,EGLint name)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