kmscube/cube-wl.cpp

   1
   2 #include <wayland-client.h>
   3 #include <wayland-egl.h>
   4
   5 #include <EGL/egl.h>
   6 #include <GL/gl.h>
   7
   8 #include <string.h>
   9
  10 static struct wl_compositor *s_compositor = NULL;
  11 static struct wl_shell *s_shell = NULL;
  12 static EGLDisplay s_egl_display;
  13 static char s_running = 1;
  14
  15 struct window {
  16         EGLContext egl_context;
  17         struct wl_surface *surface;
  18         struct wl_shell_surface *shell_surface;
  19         struct wl_egl_window *egl_window;
  20         EGLSurface egl_surface;
  21 };
  22
  23 // listeners
  24 static void registry_add_object(void *data, struct wl_registry *registry, uint32_t name, const char *interface, uint32_t version)
  25 {
  26         if (!strcmp(interface, "wl_compositor"))
  27                 s_compositor = (struct wl_compositor*)wl_registry_bind(registry, name, &wl_compositor_interface, 0);
  28         else if (!strcmp(interface, "wl_shell"))
  29                 s_shell = (struct wl_shell*)wl_registry_bind(registry, name, &wl_shell_interface, 0);
  30 }
  31
  32 static void registry_remove_object(void *data, struct wl_registry *registry, uint32_t name)
  33 {
  34
  35 }
  36
  37 static struct wl_registry_listener registry_listener = { &registry_add_object, &registry_remove_object };
  38
  39 static void shell_surface_ping(void *data, struct wl_shell_surface *shell_surface, uint32_t serial)
  40 {
  41         wl_shell_surface_pong(shell_surface, serial);
  42 }
  43
  44 static void shell_surface_configure(void *data, struct wl_shell_surface *shell_surface, uint32_t edges, int32_t width, int32_t height)
  45 {
  46         struct window *window = (struct window*)data;
  47
  48         wl_egl_window_resize(window->egl_window, width, height, 0, 0);
  49 }
  50
  51 static void shell_surface_popup_done(void *data, struct wl_shell_surface *shell_surface)
  52 {
  53
  54 }
  55
  56 static struct wl_shell_surface_listener shell_surface_listener = { &shell_surface_ping, &shell_surface_configure, &shell_surface_popup_done };
  57
  58 static void create_window(struct window *window, int32_t width, int32_t height)
  59 {
  60         eglBindAPI(EGL_OPENGL_API);
  61         EGLint attributes[] = {
  62                 EGL_RED_SIZE,   8,
  63                 EGL_GREEN_SIZE, 8,
  64                 EGL_BLUE_SIZE,  8,
  65                 EGL_NONE
  66         };
  67         EGLConfig config;
  68         EGLint num_config;
  69         eglChooseConfig(s_egl_display, attributes, &config, 1, &num_config);
  70         window->egl_context = eglCreateContext(s_egl_display, config, EGL_NO_CONTEXT, NULL);
  71
  72         window->surface = wl_compositor_create_surface(s_compositor);
  73         window->shell_surface = wl_shell_get_shell_surface(s_shell, window->surface);
  74         wl_shell_surface_add_listener(window->shell_surface, &shell_surface_listener, window);
  75         wl_shell_surface_set_toplevel(window->shell_surface);
  76         window->egl_window = wl_egl_window_create(window->surface, width, height);
  77         window->egl_surface = eglCreateWindowSurface(s_egl_display, config, window->egl_window, NULL);
  78         eglMakeCurrent(s_egl_display, window->egl_surface, window->egl_surface, window->egl_context);
  79 }
  80
  81 static void delete_window(struct window *window)
  82 {
  83         eglDestroySurface(s_egl_display, window->egl_surface);
  84         wl_egl_window_destroy(window->egl_window);
  85         wl_shell_surface_destroy(window->shell_surface);
  86         wl_surface_destroy(window->surface);
  87         eglDestroyContext(s_egl_display, window->egl_context);
  88 }
  89
  90 static void draw_window(struct window *window)
  91 {
  92         glClearColor(0.0, 1.0, 0.0, 1.0);
  93         glClear(GL_COLOR_BUFFER_BIT);
  94         eglSwapBuffers(s_egl_display, window->egl_surface);
  95 }
  96
  97 int main_wl()
  98 {
  99         struct wl_display *display = wl_display_connect(NULL);
 100         struct wl_registry *registry = wl_display_get_registry(display);
 101         wl_registry_add_listener(registry, &registry_listener, NULL);
 102         wl_display_roundtrip(display);
 103
 104         s_egl_display = eglGetDisplay(display);
 105         eglInitialize(s_egl_display, NULL, NULL);
 106
 107         uint32_t width = 600;
 108         uint32_t height = 600;
 109
 110         struct window window;
 111         create_window(&window, width, height);
 112
 113         while (s_running) {
 114                 wl_display_dispatch_pending(display);
 115                 draw_window(&window);
 116         }
 117
 118         delete_window(&window);
 119         eglTerminate(s_egl_display);
 120         wl_display_disconnect(display);
 121         return 0;
 122 }