3 * @brief EGL OpenGL extension module
5 /*****************************************************************************
6 * Copyright © 2010-2011 Rémi Denis-Courmont
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU Lesser General Public License as published by
10 * the Free Software Foundation; either version 2.1 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public License
19 * along with this program; if not, write to the Free Software Foundation,
20 * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
21 *****************************************************************************/
31 #include <vlc_common.h>
32 #include <vlc_plugin.h>
33 #include <vlc_opengl.h>
34 #include <vlc_vout_window.h>
36 # include <vlc_xlib.h>
39 /* Plugin callbacks */
40 static int OpenGLES2 (vlc_object_t *);
41 static int OpenGLES (vlc_object_t *);
42 static int OpenGL (vlc_object_t *);
43 static void Close (vlc_object_t *);
46 set_shortname (N_("EGL"))
47 set_description (N_("EGL extension for OpenGL"))
48 set_category (CAT_VIDEO)
49 set_subcategory (SUBCAT_VIDEO_VOUT)
50 set_capability ("opengl", 50)
51 set_callbacks (OpenGL, Close)
55 set_capability ("opengl es2", 50)
56 set_callbacks (OpenGLES2, Close)
60 set_capability ("opengl es", 50)
61 set_callbacks (OpenGLES, Close)
66 typedef struct vlc_gl_sys_t
73 /* OpenGL callbacks */
74 static int MakeCurrent (vlc_gl_t *);
75 static void ReleaseCurrent (vlc_gl_t *);
76 static void SwapBuffers (vlc_gl_t *);
77 static void *GetSymbol(vlc_gl_t *, const char *);
79 static bool CheckAPI (EGLDisplay dpy, const char *api)
81 const char *apis = eglQueryString (dpy, EGL_CLIENT_APIS);
82 size_t apilen = strlen (api);
84 /* Cannot use strtok_r() on constant string... */
89 if (!strncmp (apis, api, apilen)
90 && (memchr (" ", apis[apilen], 2) != NULL))
93 apis = strchr (apis, ' ');
110 * Probe EGL display availability
112 static int Open (vlc_object_t *obj, const struct gl_api *api)
114 vlc_gl_t *gl = (vlc_gl_t *)obj;
116 /* http://www.khronos.org/registry/egl/api/EGL/eglplatform.h defines the
117 * list and order of EGL platforms. */
118 #if defined(_WIN32) || defined(__VC32__) \
119 && !defined(__CYGWIN__) && !defined(__SCITECH_SNAP__) /* Win32 and WinCE */
120 # define vlc_eglGetWindow(w) ((w)->handle.hwnd)
122 #elif defined(__WINSCW__) || defined(__SYMBIAN32__) /* Symbian */
123 # error Symbian EGL not supported.
125 #elif defined(__ANDROID__) || defined(ANDROID)
126 # error Android EGL not supported
128 #elif defined(__unix__) /* X11 (tentative) */
129 # define vlc_eglGetWindow(w) ((w)->handle.xid)
130 /* EGL can only use the default X11 display */
131 if (gl->surface->display.x11 != NULL)
133 if (!vlc_xlib_init (obj))
137 # error EGL platform not recognized.
140 /* Initialize EGL display */
141 /* TODO: support various display types */
142 EGLDisplay dpy = eglGetDisplay (EGL_DEFAULT_DISPLAY);
143 if (dpy == EGL_NO_DISPLAY)
146 vlc_gl_sys_t *sys = malloc (sizeof (*sys));
147 if (unlikely(sys == NULL))
153 if (eglInitialize (dpy, &major, &minor) != EGL_TRUE)
155 /* No need to call eglTerminate() in this case */
160 if (major != 1 || minor < api->min_minor || !CheckAPI (dpy, api->name))
163 msg_Dbg (obj, "EGL version %s by %s", eglQueryString (dpy, EGL_VERSION),
164 eglQueryString (dpy, EGL_VENDOR));
166 const char *ext = eglQueryString (dpy, EGL_EXTENSIONS);
168 msg_Dbg (obj, " extensions: %s", ext);
171 const EGLint conf_attr[] = {
175 EGL_RENDERABLE_TYPE, api->render_bit,
181 if (eglChooseConfig (dpy, conf_attr, cfgv, 1, &cfgc) != EGL_TRUE
184 msg_Err (obj, "cannot choose EGL configuration");
188 /* Create a drawing surface */
189 EGLNativeWindowType win = vlc_eglGetWindow(gl->surface);
190 EGLSurface surface = eglCreateWindowSurface (dpy, cfgv[0], win, NULL);
191 if (surface == EGL_NO_SURFACE)
193 msg_Err (obj, "cannot create EGL window surface");
196 sys->surface = surface;
198 if (eglBindAPI (api->api) != EGL_TRUE)
200 msg_Err (obj, "cannot bind EGL API");
204 EGLContext ctx = eglCreateContext (dpy, cfgv[0], EGL_NO_CONTEXT,
206 if (ctx == EGL_NO_CONTEXT)
208 msg_Err (obj, "cannot create EGL context");
213 /* Initialize OpenGL callbacks */
215 gl->makeCurrent = MakeCurrent;
216 gl->releaseCurrent = ReleaseCurrent;
217 gl->swap = SwapBuffers;
218 gl->getProcAddress = GetSymbol;
228 static int OpenGLES2 (vlc_object_t *obj)
230 static const struct gl_api api = {
231 "OpenGL_ES", EGL_OPENGL_ES_API, 3, EGL_OPENGL_ES2_BIT,
232 { EGL_CONTEXT_CLIENT_VERSION, 2, EGL_NONE },
234 return Open (obj, &api);
237 static int OpenGLES (vlc_object_t *obj)
239 static const struct gl_api api = {
240 "OpenGL_ES", EGL_OPENGL_ES_API, 0, EGL_OPENGL_ES_BIT,
241 { EGL_CONTEXT_CLIENT_VERSION, 1, EGL_NONE },
243 return Open (obj, &api);
246 static int OpenGL (vlc_object_t *obj)
248 static const struct gl_api api = {
249 "OpenGL", EGL_OPENGL_API, 4, EGL_OPENGL_BIT,
252 return Open (obj, &api);
255 static void Close (vlc_object_t *obj)
257 vlc_gl_t *gl = (vlc_gl_t *)obj;
258 vlc_gl_sys_t *sys = gl->sys;
260 eglTerminate (sys->display);
264 static int MakeCurrent (vlc_gl_t *gl)
266 vlc_gl_sys_t *sys = gl->sys;
268 if (eglMakeCurrent (sys->display, sys->surface, sys->surface,
269 sys->context) != EGL_TRUE)
274 static void ReleaseCurrent (vlc_gl_t *gl)
276 vlc_gl_sys_t *sys = gl->sys;
278 eglMakeCurrent (sys->display, EGL_NO_SURFACE, EGL_NO_SURFACE,
282 static void SwapBuffers (vlc_gl_t *gl)
284 vlc_gl_sys_t *sys = gl->sys;
286 eglSwapBuffers (sys->display, sys->surface);
289 static void *GetSymbol(vlc_gl_t *gl, const char *procname)
292 return (void *)eglGetProcAddress (procname);