Move sample from agl-service-homescreen-2017
[src/libhomescreen.git] / sample / simple-egl / src / simple-egl.cpp
diff --git a/sample/simple-egl/src/simple-egl.cpp b/sample/simple-egl/src/simple-egl.cpp
new file mode 100644 (file)
index 0000000..4494ac8
--- /dev/null
@@ -0,0 +1,744 @@
+/*
+ * Copyright (c) 2017 TOYOTA MOTOR CORPORATION
+ * Copyright © 2011 Benjamin Franzke
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#include <mutex>
+#include <chrono>
+
+#include <iostream>
+#include <string>
+#include <stdarg.h>
+#include <sys/types.h>
+#include <thread>
+#include <exception>
+#include <vector>
+#include <sstream>
+
+#include <assert.h>
+#include <signal.h>
+
+#include <wayland-client.h>
+#include <wayland-egl.h>
+
+#include <GLES2/gl2.h>
+#include <EGL/egl.h>
+#include <EGL/eglext.h>
+
+#include "libwindowmanager.h"
+#include <libhomescreen.hpp>
+
+#include <ilm/ivi-application-client-protocol.h>
+using namespace std;
+
+
+uint32_t g_id_ivisurf = 9009;
+long port = 1700;
+string token = string("wm");
+bool enable_debug = false;
+
+string app_name = string("Navigation");
+
+LibHomeScreen* hs;
+LibWindowmanager *wm;
+
+static const struct wl_interface *types[] = {
+        NULL,
+        NULL,
+        NULL,
+        &wl_surface_interface,
+        &ivi_surface_interface,
+};
+
+static const struct wl_message ivi_surface_requests[] = {
+        { "destroy", "", types + 0 },
+};
+
+static const struct wl_message ivi_surface_events[] = {
+        { "configure", "ii", types + 0 },
+};
+
+const struct wl_interface ivi_surface_interface = {
+        "ivi_surface", 1,
+        1, ivi_surface_requests,
+        1, ivi_surface_events,
+};
+
+static const struct wl_message ivi_application_requests[] = {
+        { "surface_create", "uon", types + 2 },
+};
+
+const struct wl_interface ivi_application_interface = {
+       "ivi_application", 1,
+       1, ivi_application_requests,
+       0, NULL,
+};
+
+#include "platform.h"
+
+#ifndef EGL_EXT_swap_buffers_with_damage
+#define EGL_EXT_swap_buffers_with_damage 1
+typedef EGLBoolean (EGLAPIENTRYP PFNEGLSWAPBUFFERSWITHDAMAGEEXTPROC)(EGLDisplay dpy, EGLSurface surface, EGLint *rects, EGLint n_rects);
+#endif
+
+#ifndef EGL_EXT_buffer_age
+#define EGL_EXT_buffer_age 1
+#define EGL_BUFFER_AGE_EXT                     0x313D
+#endif
+
+struct window;
+struct seat;
+
+struct display {
+       struct wl_display *display;
+       struct wl_registry *registry;
+       struct wl_compositor *compositor;
+       struct wl_seat *seat;
+       struct {
+               EGLDisplay dpy;
+               EGLContext ctx;
+               EGLConfig conf;
+       } egl;
+       struct window *window;
+       struct ivi_application *ivi_application;
+
+       PFNEGLSWAPBUFFERSWITHDAMAGEEXTPROC swap_buffers_with_damage;
+};
+
+struct geometry {
+       int width, height;
+};
+
+struct window {
+       struct display *display;
+       struct geometry geometry, window_size;
+       struct {
+               GLuint rotation_uniform;
+               GLuint pos;
+               GLuint col;
+       } gl;
+
+       uint32_t benchmark_time, frames;
+       struct wl_egl_window *native;
+       struct wl_surface *surface;
+       struct ivi_surface *ivi_surface;
+       EGLSurface egl_surface;
+       struct wl_callback *callback;
+       int fullscreen, opaque, buffer_size, frame_sync;
+};
+
+static const char *vert_shader_text =
+       "uniform mat4 rotation;\n"
+       "attribute vec4 pos;\n"
+       "attribute vec4 color;\n"
+       "varying vec4 v_color;\n"
+       "void main() {\n"
+       "  gl_Position = rotation * pos;\n"
+       "  v_color = color;\n"
+       "}\n";
+
+static const char *frag_shader_text =
+       "precision mediump float;\n"
+       "varying vec4 v_color;\n"
+       "void main() {\n"
+       "  gl_FragColor = v_color;\n"
+       "}\n";
+
+static int running = 1;
+
+static void debug_out(const char* str, ...)
+{
+       if(!enable_debug)
+               return;
+       char *out;
+       va_list arg_ptr;
+       va_start(arg_ptr, str);
+       vasprintf(&out, str, arg_ptr);
+       cout << out;
+       va_end(arg_ptr);
+       // cout << endl;
+}
+
+static void
+init_egl(struct display *display, struct window *window)
+{
+       static const EGLint context_attribs[] = {
+               EGL_CONTEXT_CLIENT_VERSION, 2,
+               EGL_NONE
+       };
+       const char *extensions;
+
+       EGLint config_attribs[] = {
+               EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
+               EGL_RED_SIZE, 1,
+               EGL_GREEN_SIZE, 1,
+               EGL_BLUE_SIZE, 1,
+               EGL_ALPHA_SIZE, 1,
+               EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
+               EGL_NONE
+       };
+
+       EGLint major, minor, n, count, i, size;
+       EGLConfig *configs;
+       EGLBoolean ret;
+
+       if (window->opaque || window->buffer_size == 16)
+               config_attribs[9] = 0;
+       
+       display->egl.dpy = weston_platform_get_egl_display(EGL_PLATFORM_WAYLAND_KHR, display->display, NULL);
+       assert(display->egl.dpy);
+
+       ret = eglInitialize(display->egl.dpy, &major, &minor);
+       assert(ret == EGL_TRUE);
+       ret = eglBindAPI(EGL_OPENGL_ES_API);
+       assert(ret == EGL_TRUE);
+
+       if (!eglGetConfigs(display->egl.dpy, NULL, 0, &count) || count < 1)
+               assert(0);
+
+       configs = calloc(count, sizeof *configs);
+       assert(configs);
+
+       ret = eglChooseConfig(display->egl.dpy, config_attribs,
+                             configs, count, &n);
+       assert(ret && n >= 1);
+
+       for (i = 0; i < n; i++) {
+               eglGetConfigAttrib(display->egl.dpy,
+                                  configs[i], EGL_BUFFER_SIZE, &size);
+               if (window->buffer_size == size) {
+                       display->egl.conf = configs[i];
+                       break;
+               }
+       }
+       free(configs);
+       if (display->egl.conf == NULL) {
+               debug_out("did not find config with buffer size %d\n",
+                       window->buffer_size);
+               exit(EXIT_FAILURE);
+       }
+
+       display->egl.ctx = eglCreateContext(display->egl.dpy,
+                                           display->egl.conf,
+                                           EGL_NO_CONTEXT, context_attribs);
+       assert(display->egl.ctx);
+
+       display->swap_buffers_with_damage = NULL;
+       extensions = eglQueryString(display->egl.dpy, EGL_EXTENSIONS);
+       if (extensions &&
+           strstr(extensions, "EGL_EXT_swap_buffers_with_damage") &&
+           strstr(extensions, "EGL_EXT_buffer_age"))
+               display->swap_buffers_with_damage =
+                       (PFNEGLSWAPBUFFERSWITHDAMAGEEXTPROC)
+                       eglGetProcAddress("eglSwapBuffersWithDamageEXT");
+
+       if (display->swap_buffers_with_damage)
+               debug_out("has EGL_EXT_buffer_age and EGL_EXT_swap_buffers_with_damage\n");
+
+}
+
+static void
+fini_egl(struct display *display)
+{
+       eglTerminate(display->egl.dpy);
+       eglReleaseThread();
+}
+
+static GLuint
+create_shader(struct window *window, const char *source, GLenum shader_type)
+{
+       GLuint shader;
+       GLint status;
+
+       shader = glCreateShader(shader_type);
+       assert(shader != 0);
+
+       glShaderSource(shader, 1, (const char **) &source, NULL);
+       glCompileShader(shader);
+
+       glGetShaderiv(shader, GL_COMPILE_STATUS, &status);
+       if (!status) {
+               char log[1000];
+               GLsizei len;
+               glGetShaderInfoLog(shader, 1000, &len, log);
+               debug_out("Error: compiling %s: %*s\n",
+                       shader_type == GL_VERTEX_SHADER ? "vertex" : "fragment",
+                       len, log);
+               exit(1);
+       }
+
+       return shader;
+}
+
+static void
+init_gl(struct window *window)
+{
+       GLuint frag, vert;
+       GLuint program;
+       GLint status;
+
+       frag = create_shader(window, frag_shader_text, GL_FRAGMENT_SHADER);
+       vert = create_shader(window, vert_shader_text, GL_VERTEX_SHADER);
+
+       program = glCreateProgram();
+       glAttachShader(program, frag);
+       glAttachShader(program, vert);
+       glLinkProgram(program);
+
+       glGetProgramiv(program, GL_LINK_STATUS, &status);
+       if (!status) {
+               char log[1000];
+               GLsizei len;
+               glGetProgramInfoLog(program, 1000, &len, log);
+               debug_out("Error: linking:\n%*s\n", len, log);
+               exit(1);
+       }
+
+       glUseProgram(program);
+
+       window->gl.pos = 0;
+       window->gl.col = 1;
+
+       glBindAttribLocation(program, window->gl.pos, "pos");
+       glBindAttribLocation(program, window->gl.col, "color");
+       glLinkProgram(program);
+
+       window->gl.rotation_uniform =
+               glGetUniformLocation(program, "rotation");
+}
+
+static void
+handle_ivi_surface_configure(void *data, struct ivi_surface *ivi_surface,
+                             int32_t width, int32_t height)
+{
+       struct window *window = data;
+
+       wl_egl_window_resize(window->native, width, height, 0, 0);
+
+       window->geometry.width = width;
+       window->geometry.height = height;
+
+       if (!window->fullscreen)
+               window->window_size = window->geometry;
+}
+
+static const struct ivi_surface_listener ivi_surface_listener = {
+       handle_ivi_surface_configure,
+};
+
+static void
+create_ivi_surface(struct window *window, struct display *display)
+{
+       uint32_t id_ivisurf = g_id_ivisurf;
+       window->ivi_surface =
+               ivi_application_surface_create(display->ivi_application,
+                                              id_ivisurf, window->surface);
+
+       if (window->ivi_surface == NULL) {
+               debug_out("Failed to create ivi_client_surface\n");
+               abort();
+       }
+
+       ivi_surface_add_listener(window->ivi_surface,
+                                &ivi_surface_listener, window);
+}
+
+static void
+create_surface(struct window *window)
+{
+       struct display *display = window->display;
+       EGLBoolean ret;
+
+       window->surface = wl_compositor_create_surface(display->compositor);
+
+       window->native =
+               wl_egl_window_create(window->surface,
+                                    window->geometry.width,
+                                    window->geometry.height);
+       window->egl_surface =
+               weston_platform_create_egl_surface(display->egl.dpy,
+                                                  display->egl.conf,
+                                                  window->native, NULL);
+
+
+       if (display->ivi_application ) {
+               create_ivi_surface(window, display);
+       } else {
+               assert(0);
+       }
+
+       ret = eglMakeCurrent(window->display->egl.dpy, window->egl_surface,
+                            window->egl_surface, window->display->egl.ctx);
+       assert(ret == EGL_TRUE);
+
+       if (!window->frame_sync)
+               eglSwapInterval(display->egl.dpy, 0);
+
+}
+
+static void
+destroy_surface(struct window *window)
+{
+       /* Required, otherwise segfault in egl_dri2.c: dri2_make_current()
+        * on eglReleaseThread(). */
+       eglMakeCurrent(window->display->egl.dpy, EGL_NO_SURFACE, EGL_NO_SURFACE,
+                      EGL_NO_CONTEXT);
+
+       eglDestroySurface(window->display->egl.dpy, window->egl_surface);
+       wl_egl_window_destroy(window->native);
+
+       if (window->display->ivi_application)
+               ivi_surface_destroy(window->ivi_surface);
+       wl_surface_destroy(window->surface);
+
+       if (window->callback)
+               wl_callback_destroy(window->callback);
+}
+
+static void
+redraw(void *data, struct wl_callback *callback, uint32_t time)
+{
+       struct window *window = data;
+       struct display *display = window->display;
+       static const GLfloat verts[3][2] = {
+               { -0.5, -0.5 },
+               {  0.5, -0.5 },
+               {  0,    0.5 }
+       };
+
+       static const GLfloat colors_H[3][3] = {
+               { 1, 1, 1 },
+               { 1, 1, 1 },
+               { 1, 1, 1 }
+       };
+
+       static const GLfloat colors_N[3][3] = {
+               { 1, 0, 0 },
+               { 0, 1, 0 },
+               { 0, 0, 1 }
+       };
+
+       GLfloat angle;
+       GLfloat rotation[4][4] = {
+               { 1, 0, 0, 0 },
+               { 0, 1, 0, 0 },
+               { 0, 0, 1, 0 },
+               { 0, 0, 0, 1 }
+       };
+       static const uint32_t speed_div = 5, benchmark_interval = 5;
+       struct wl_region *region;
+       EGLint rect[4];
+       EGLint buffer_age = 0;
+       struct timeval tv;
+
+       assert(window->callback == callback);
+       window->callback = NULL;
+
+       if (callback)
+               wl_callback_destroy(callback);
+
+       gettimeofday(&tv, NULL);
+       time = tv.tv_sec * 1000 + tv.tv_usec / 1000;
+       if (window->frames == 0)
+               window->benchmark_time = time;
+       if (time - window->benchmark_time > (benchmark_interval * 1000)) {
+               debug_out("%d frames in %d seconds: %f fps\n",
+                      window->frames,
+                      benchmark_interval,
+                      (float) window->frames / benchmark_interval);
+               window->benchmark_time = time;
+               window->frames = 0;
+       }
+
+       angle = (time / speed_div) % 360 * M_PI / 180.0;
+       rotation[0][0] =  cos(angle);
+       rotation[0][2] =  sin(angle);
+       rotation[2][0] = -sin(angle);
+       rotation[2][2] =  cos(angle);
+
+       if (display->swap_buffers_with_damage)
+               eglQuerySurface(display->egl.dpy, window->egl_surface,
+                               EGL_BUFFER_AGE_EXT, &buffer_age);
+
+       glViewport(0, 0, window->geometry.width, window->geometry.height);
+
+       glUniformMatrix4fv(window->gl.rotation_uniform, 1, GL_FALSE,
+                          (GLfloat *) rotation);
+
+       glClearColor(0.0, 0.0, 0.0, 0.5);
+       glClear(GL_COLOR_BUFFER_BIT);
+
+       glVertexAttribPointer(window->gl.pos, 2, GL_FLOAT, GL_FALSE, 0, verts);
+       if(app_name == string("HVAC")){
+               glVertexAttribPointer(window->gl.col, 3, GL_FLOAT, GL_FALSE, 0, colors_H);
+       }
+       else{
+               glVertexAttribPointer(window->gl.col, 3, GL_FLOAT, GL_FALSE, 0, colors_N);
+       }
+       glEnableVertexAttribArray(window->gl.pos);
+       glEnableVertexAttribArray(window->gl.col);
+
+       glDrawArrays(GL_TRIANGLES, 0, 3);
+
+       glDisableVertexAttribArray(window->gl.pos);
+       glDisableVertexAttribArray(window->gl.col);
+
+       if (window->opaque || window->fullscreen) {
+               region = wl_compositor_create_region(window->display->compositor);
+               wl_region_add(region, 0, 0,
+                             window->geometry.width,
+                             window->geometry.height);
+               wl_surface_set_opaque_region(window->surface, region);
+               wl_region_destroy(region);
+       } else {
+               wl_surface_set_opaque_region(window->surface, NULL);
+       }
+
+       if (display->swap_buffers_with_damage && buffer_age > 0) {
+               rect[0] = window->geometry.width / 4 - 1;
+               rect[1] = window->geometry.height / 4 - 1;
+               rect[2] = window->geometry.width / 2 + 2;
+               rect[3] = window->geometry.height / 2 + 2;
+               display->swap_buffers_with_damage(display->egl.dpy,
+                                                 window->egl_surface,
+                                                 rect, 1);
+       } else {
+               eglSwapBuffers(display->egl.dpy, window->egl_surface);
+       }
+    
+       window->frames++;
+}
+
+static void
+registry_handle_global(void *data, struct wl_registry *registry,
+                      uint32_t name, const char *interface, uint32_t version)
+{
+       struct display *d = data;
+
+       if (strcmp(interface, "wl_compositor") == 0) {
+               d->compositor =
+                       wl_registry_bind(registry, name,
+                                        &wl_compositor_interface, 1);
+       } else if (strcmp(interface, "ivi_application") == 0) {
+               d->ivi_application =
+                       wl_registry_bind(registry, name,
+                                        &ivi_application_interface, 1);
+       }
+}
+
+static void
+registry_handle_global_remove(void *data, struct wl_registry *registry,
+                             uint32_t name)
+{
+}
+
+static const struct wl_registry_listener registry_listener = {
+       registry_handle_global,
+       registry_handle_global_remove
+};
+
+static void
+signal_int(int signum)
+{
+       running = 0;
+}
+
+int
+init_wm(LibWindowmanager *wm)
+{
+       char* surfaceIdStr;
+
+       if (wm->init(port, token.c_str()) != 0) {
+               debug_out("************** [SIMPLE EGL] [WM SIMPLE >>>>] wm init failed. \n");
+               return -1;
+       }
+
+       if (wm->requestSurface(app_name.c_str()) != 0) {
+               debug_out("************** [SIMPLE EGL] [WM SIMPLE >>>>] wm request surface failed \n");
+               return -1;
+       }
+
+       wm->set_event_handler(LibWindowmanager::Event_Active, [](char const *label) {
+               debug_out("************** [SIMPLE EGL] [WM SIMPLE >>>>] Surface %s got activated! \n", label);
+       });
+
+       wm->set_event_handler(LibWindowmanager::Event_Inactive, [](char const *label) {
+               debug_out("************** [SIMPLE EGL] [WM SIMPLE >>>>] Surface %s got inactivated!\n", label);
+       });
+
+       wm->set_event_handler(LibWindowmanager::Event_Visible, [wm](char const *label) {
+               debug_out("************** [SIMPLE EGL] [WM SIMPLE >>>>] Surface %s got visibled!\n", label);
+       });
+
+       wm->set_event_handler(LibWindowmanager::Event_Invisible, [](char const *label) {
+               debug_out("************** [SIMPLE EGL] [WM SIMPLE >>>>] Surface %s got invisibled!\n", label);
+       });
+
+       wm->set_event_handler(LibWindowmanager::Event_SyncDraw, [wm](char const *label) {
+               debug_out("************** [SIMPLE EGL] [WM SIMPLE >>>>] Surface %s got syncdraw!\n", label);
+        debug_out("************** [SIMPLE EGL] [WM SIMPLE >>>>] try to endDraw %s \n", app_name.c_str());
+        wm->endDraw(app_name.c_str());
+       });
+
+       wm->set_event_handler(LibWindowmanager::Event_FlushDraw, [](char const *label) {
+               debug_out("************** [SIMPLE EGL] [WM SIMPLE >>>>] Surface %s got flushdraw! \n", label);
+       });
+
+       do
+       {
+        surfaceIdStr = getenv("QT_IVI_SURFACE_ID");
+       } while (surfaceIdStr == NULL);  
+       
+       g_id_ivisurf = atoi(surfaceIdStr);
+       debug_out("************** [SIMPLE EGL] [WM SIMPLE >>>>] IVI_SURFACE_ID: %d \n", g_id_ivisurf);
+
+       return 0;
+}
+
+int
+init_hs(LibHomeScreen* hs){
+       if(hs->init(port, token)!=0)
+       {
+               debug_out("************** [SIMPLE EGL] [HS SIMPLE >>>>] homescreen init failed. \n");
+               return -1;
+       }
+
+       hs->set_event_handler(LibHomeScreen::Event_TapShortcut, [](const char* application_name){
+               debug_out("************** [SIMPLE EGL] [HS SIMPLE >>>>] Event_TapShortcut application_name = %s \n", application_name);
+               if(strcmp(application_name, app_name.c_str()) == 0)
+               {
+                       debug_out("************** [SIMPLE EGL] [HS SIMPLE] try to activesurface %s \n", app_name.c_str());
+                       wm->activateSurface(app_name.c_str());
+               }
+       });
+
+       hs->set_event_handler(LibHomeScreen::Event_OnScreenMessage, [](const char* display_message){
+       debug_out("************** [SIMPLE EGL] [HS SIMPLE >>>>] Event_OnScreenMessage display_message = %s \n", display_message);
+       });
+
+       return 0;
+}
+
+int
+main(int argc, char **argv)
+{
+       struct sigaction sigint;
+    struct window  window  = { 0 };
+       struct display display = { 0 };
+
+       if(getenv("ENABLE_DEMO_DEBUG"))
+       {
+               enable_debug = true;
+       }
+
+       window.display = &display;
+       display.window = &window;
+       window.geometry.width  = 1080;
+       window.geometry.height = 1488;
+       window.window_size = window.geometry;
+       window.buffer_size = 32;
+       window.frame_sync = 1;
+
+       if(argc > 2)
+       {
+               if(string(argv[0]).find("hvac") != string::npos)
+                       app_name = string("HVAC");
+               port = strtol(argv[1], NULL, 10);
+               token = argv[2];
+       }
+
+       debug_out("************** [SIMPLE EGL] [MAIN] app_name: %s, port: %d, token: %s. \n", app_name.c_str(), port, token.c_str());
+
+       display.display = wl_display_connect(NULL);
+       assert(display.display);
+
+       display.registry = wl_display_get_registry(display.display);
+       wl_registry_add_listener(display.registry,
+                                &registry_listener, &display);
+
+       wl_display_roundtrip(display.display);
+
+       init_egl(&display, &window);
+
+       wm = new LibWindowmanager();
+       hs = new LibHomeScreen();
+       
+       if(init_wm(wm)!=0){
+               fini_egl(&display);
+               if (display.ivi_application)
+                       ivi_application_destroy(display.ivi_application);
+               if (display.compositor)
+                       wl_compositor_destroy(display.compositor);
+               wl_registry_destroy(display.registry);
+               wl_display_flush(display.display);
+               return -1;
+       }
+
+       if(init_hs(hs)!=0){
+               fini_egl(&display);
+               if (display.ivi_application)
+                       ivi_application_destroy(display.ivi_application);
+               if (display.compositor)
+                       wl_compositor_destroy(display.compositor);
+               wl_registry_destroy(display.registry);
+               wl_display_flush(display.display);
+               return -1;
+       }
+
+       create_surface(&window);
+       init_gl(&window);
+       
+       //Ctrl+C
+       sigint.sa_handler = signal_int;
+       sigemptyset(&sigint.sa_mask);
+       sigint.sa_flags = SA_RESETHAND;
+       sigaction(SIGINT, &sigint, NULL);
+
+       eglSwapBuffers(display.egl.dpy, window.egl_surface);
+       wm->activateSurface(app_name.c_str());
+       
+       /* The mainloop here is a little subtle.  Redrawing will cause
+        * EGL to read events so we can just call
+        * wl_display_dispatch_pending() to handle any events that got
+        * queued up as a side effect. */
+       while (running) {
+               wl_display_dispatch_pending(display.display);
+               redraw(&window, NULL, 0);
+       }
+
+       debug_out("************** [SIMPLE EGL] [MAIN] simple-egl exiting! \n");
+
+       destroy_surface(&window);
+       fini_egl(&display);
+
+       if (display.ivi_application)
+               ivi_application_destroy(display.ivi_application);
+
+       if (display.compositor)
+               wl_compositor_destroy(display.compositor);
+
+       wl_registry_destroy(display.registry);
+       wl_display_flush(display.display);
+       wl_display_disconnect(display.display);
+
+       return 0;
+}