example: port testegl.c to desktop

Will be easier to maintain.

Also uniformize autotool build with meson build which is
already retrieving the gl libs.

https://bugzilla.gnome.org/show_bug.cgi?id=781606

configure.ac

@@ -163,6 +163,27 @@ GST_PREFIX="`$PKG_CONFIG --variable=prefix gstreamer-$GST_API_VERSION`"
 AC_SUBST(GLIB_PREFIX)
 AC_SUBST(GST_PREFIX)
 
+dnl *** EGL ***
+PKG_CHECK_MODULES([EGL], [egl], [
+  AC_DEFINE(HAVE_EGL, 1, [Have egl])
+  HAVE_EGL=yes
+], [HAVE_EGL=no])
+AM_CONDITIONAL(HAVE_EGL, test "x$HAVE_EGL" = "xyes")
+
+dnl *** GLESv2 ***
+PKG_CHECK_MODULES([GLES2], [glesv2], [
+  AC_DEFINE(HAVE_EGL, 1, [Have glesv2])
+  HAVE_GLES2=yes
+], [HAVE_GLES2=no])
+AM_CONDITIONAL(HAVE_GLES2, test "x$HAVE_GLES2" = "xyes")
+
+dnl *** X11 ***
+PKG_CHECK_MODULES([X11], [x11], [
+  AC_DEFINE(HAVE_X11, 1, [Have x11])
+  HAVE_X11=yes
+], [HAVE_X11=no])
+AM_CONDITIONAL(HAVE_X11, test "x$HAVE_X11" = "xyes")
+
 dnl Check for -Bsymbolic-functions linker flag used to avoid
 dnl intra-library PLT jumps, if available.
 AC_ARG_ENABLE(Bsymbolic,

examples/egl/Makefile.am

@@ -2,6 +2,10 @@ noinst_PROGRAMS =
 
 if USE_OMX_TARGET_RPI
 noinst_PROGRAMS += testegl
+else
+if HAVE_X11
+noinst_PROGRAMS += testegl
+endif
 endif
 
 testegl_SOURCES = testegl.c
@@ -16,9 +20,24 @@ testegl_LDADD = \
 	$(GST_GL_LIBS) \
 	-lm
 
+if HAVE_GLES2
+testegl_LDADD += $(GLES2_LIBS)
+endif
+
+if HAVE_EGL
+testegl_LDADD += $(EGL_LIBS)
+endif
+
+if HAVE_X11
+testegl_LDADD += $(X11_LIBS)
+endif
+
+if USE_OMX_TARGET_RPI
+testegl_LDADD += -lbcm_host
+endif
+
 testegl_CFLAGS = \
 	$(GST_PLUGINS_BASE_CFLAGS) \
 	$(GST_BASE_CFLAGS) \
 	$(GST_CFLAGS) \
 	$(GST_GL_CFLAGS)
-

examples/egl/meson.build

@@ -1,4 +1,9 @@
-if omx_target == 'rpi'
+optional_deps = []
+if x11_dep.found()
+  optional_deps += x11_dep
+endif
+
+if x11_dep.found() or omx_target == 'rpi'
   egl_sources = ['testegl.c']
 
   egl_dep = dependency('egl', required : false)
@@ -15,5 +20,7 @@ if omx_target == 'rpi'
       sources : egl_sources,
       c_args : gst_omx_args,
       include_directories : [configinc],
-      dependencies : [libm, gst_dep, gstvideo_dep, gstgl_dep, egl_dep, gles2_dep])
+      dependencies : [libm, gst_dep, gstvideo_dep, gstgl_dep, egl_dep,
+                      gles2_dep] + optional_deps
+  )
 endif

examples/egl/testegl.c

@@ -39,6 +39,9 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include "config.h"
 #endif
 
+#include <EGL/egl.h>
+#include <GLES2/gl2.h>
+
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -63,6 +66,9 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #if defined (USE_OMX_TARGET_RPI)
 #include <bcm_host.h>
+#elif defined(HAVE_X11)
+#include <X11/Xlib.h>
+#include <X11/Xutil.h>
 #endif
 
 #if defined (USE_OMX_TARGET_RPI) && defined (__GNUC__)
@@ -344,6 +350,11 @@ typedef struct
   /* number of rendered and dropped frames */
   guint64 rendered;
   guint64 dropped;
+
+#if !defined (USE_OMX_TARGET_RPI) && defined(HAVE_X11)
+  Display *xdisplay;
+  Window xwindow;
+#endif
 } APP_STATE_T;
 
 static void init_ogl (APP_STATE_T * state);
@@ -390,7 +401,12 @@ typedef enum
 static void
 init_ogl (APP_STATE_T * state)
 {
+#if defined (USE_OMX_TARGET_RPI)
   int32_t success = 0;
+#else
+  gint screen_num = 0;
+  gulong black_pixel = 0;
+#endif
   EGLBoolean result;
   EGLint num_config;
   EGLNativeWindowType window_handle = (EGLNativeWindowType) 0;
@@ -477,6 +493,19 @@ init_ogl (APP_STATE_T * state)
   vc_dispmanx_update_submit_sync (dispman_update);
 
   window_handle = &nativewindow;
+#elif defined(HAVE_X11)
+  state->screen_width = 1280;
+  state->screen_height = 720;
+  state->xdisplay = XOpenDisplay (NULL);
+  screen_num = DefaultScreen (state->xdisplay);
+  black_pixel = XBlackPixel (state->xdisplay, screen_num);
+  state->xwindow = XCreateSimpleWindow (state->xdisplay,
+      DefaultRootWindow (state->xdisplay), 0, 0, state->screen_width,
+      state->screen_height, 0, 0, black_pixel);
+  XSetWindowBackgroundPixmap (state->xdisplay, state->xwindow, None);
+  XMapRaised (state->xdisplay, state->xwindow);
+  XSync (state->xdisplay, FALSE);
+  window_handle = state->xwindow;
 #endif
 
   state->surface =
@@ -696,7 +725,10 @@ redraw_scene (APP_STATE_T * state)
   glDrawArrays (GL_TRIANGLE_STRIP, 16, 4);
   glDrawArrays (GL_TRIANGLE_STRIP, 20, 4);
 
-  eglSwapBuffers (state->display, state->surface);
+  if (!eglSwapBuffers (state->display, state->surface)) {
+    g_main_loop_quit (state->main_loop);
+    return;
+  }
 
   glDisable (GL_DEPTH_TEST);
   glDisable (GL_CULL_FACE);
@@ -1090,7 +1122,7 @@ init_playbin_player (APP_STATE_T * state, const gchar * uri)
   GstElement *vsink = gst_element_factory_make ("fakesink", "vsink");
 
   g_object_set (capsfilter, "caps",
-      gst_caps_from_string ("video/x-raw(memory:GLMemory)"), NULL);
+      gst_caps_from_string ("video/x-raw(memory:GLMemory), format=RGBA"), NULL);
   g_object_set (vsink, "sync", TRUE, "silent", TRUE, "qos", TRUE,
       "enable-last-sample", FALSE, "max-lateness", 20 * GST_MSECOND,
       "signal-handoffs", TRUE, NULL);
@@ -1411,6 +1443,12 @@ close_ogl (void)
   vc_dispmanx_element_remove (dispman_update, state->dispman_element);
   vc_dispmanx_update_submit_sync (dispman_update);
   vc_dispmanx_display_close (state->dispman_display);
+#elif defined(HAVE_X11)
+  XSync (state->xdisplay, FALSE);
+  XUnmapWindow (state->xdisplay, state->xwindow);
+  XDestroyWindow (state->xdisplay, state->xwindow);
+  XSync (state->xdisplay, FALSE);
+  XCloseDisplay (state->xdisplay);
 #endif
 }
 
@@ -1510,7 +1548,7 @@ main (int argc, char **argv)
   if (!res)
     goto done;
 
-  /* Create a GLib Main Loop and set it to run */
+  /* Create a GLib Main Loop */
   state->main_loop = g_main_loop_new (NULL, FALSE);
 
   /* Add a keyboard watch so we get notified of keystrokes */
@@ -1552,7 +1590,6 @@ main (int argc, char **argv)
   gst_element_set_state (state->pipeline, GST_STATE_PLAYING);
 
   /* Start the mainloop */
-  state->main_loop = g_main_loop_new (NULL, FALSE);
   g_main_loop_run (state->main_loop);
 
 done:

meson.build

@@ -153,6 +153,8 @@ gstvideo_dep = dependency('gstreamer-video-1.0', version : gst_req,
 gstgl_dep = dependency('gstreamer-gl-1.0', version : gst_req,
     fallback : ['gst-plugins-bad', 'gstgl_dep'], required : false)
 
+x11_dep = dependency('x11', required : false)
+
 if host_machine.system() != 'windows'
   gstcheck_dep = dependency('gstreamer-check-1.0', version : gst_req,
     fallback : ['gstreamer', 'gst_check_dep'])
@@ -293,6 +295,10 @@ if gstgl_dep.found()
   cdata.set ('HAVE_GST_GL', 1)
 endif
 
+if x11_dep.found()
+  cdata.set ('HAVE_X11', 1)
+endif
+
 omx_struct_packing = get_option ('with_omx_struct_packing').to_int()
 if omx_struct_packing == 0
   omx_struct_packing = default_omx_struct_packing