kmscube/cube-x11.cpp

   1
   2 #include <X11/Xlib-xcb.h>
   3 #include <X11/Xlibint.h>
   4
   5 #include "cube.h"
   6 #include "cube-egl.h"
   7 #include "cube-gles2.h"
   8
   9 #include "test.h"
  10
  11 using namespace std;
  12
  13 static void main_loop(Display* dpy, xcb_connection_t *c, xcb_window_t window, uint32_t width, uint32_t height)
  14 {
  15         EglState egl(dpy);
  16         EglSurface surface(egl, (void*)(uintptr_t)window);
  17         GlScene scene;
  18
  19         scene.set_viewport(width, height);
  20
  21         unsigned framenum = 0;
  22
  23         surface.make_current();
  24         surface.swap_buffers();
  25
  26         bool need_exit = false;
  27
  28         xcb_generic_event_t *event;
  29         while (true) {
  30
  31                 while ((event = xcb_poll_for_event (c))) {
  32                         bool handled = false;
  33                         uint8_t response_type = event->response_type & ~0x80;
  34
  35                         switch (response_type) {
  36                         case XCB_EXPOSE: {
  37                                 handled = true;
  38                                 break;
  39                         }
  40                         case XCB_KEY_PRESS: {
  41                                 handled = true;
  42
  43                                 xcb_key_press_event_t *kp = (xcb_key_press_event_t *)event;
  44                                 if (kp->detail == 24) {
  45                                         printf("Exit due to keypress\n");
  46                                         need_exit = true;
  47                                 }
  48
  49                                 break;
  50                         }
  51                         }
  52
  53                         if (!handled) {
  54                                 // Check if a custom XEvent constructor was registered in xlib for this event type, and call it discarding the constructed XEvent if any.
  55                                 // XESetWireToEvent might be used by libraries to intercept messages from the X server e.g. the OpenGL lib waiting for DRI2 events.
  56
  57                                 XLockDisplay(dpy);
  58                                 Bool (*proc)(Display*, XEvent*, xEvent*) = XESetWireToEvent(dpy, response_type, NULL);
  59                                 if (proc) {
  60                                         XESetWireToEvent(dpy, response_type, proc);
  61                                         XEvent dummy;
  62                                         event->sequence = LastKnownRequestProcessed(dpy);
  63                                         proc(dpy, &dummy, (xEvent*)event);
  64                                 }
  65                                 XUnlockDisplay(dpy);
  66                         }
  67
  68                         free(event);
  69                 }
  70
  71                 if (s_num_frames && framenum >= s_num_frames)
  72                         need_exit = true;
  73
  74                 if (need_exit)
  75                         break;
  76
  77                 // this should be in XCB_EXPOSE, but we don't get the event after swaps...
  78                 scene.draw(framenum++);
  79                 surface.swap_buffers();
  80         }
  81 }
  82
  83 void main_x11()
  84 {
  85         Display* dpy = XOpenDisplay(NULL);
  86         FAIL_IF(!dpy, "Failed to connect to the X server");
  87
  88         xcb_connection_t *c = XGetXCBConnection(dpy);
  89
  90         /* Acquire event queue ownership */
  91         XSetEventQueueOwner(dpy, XCBOwnsEventQueue);
  92
  93         /* Get the first screen */
  94         const xcb_setup_t      *setup  = xcb_get_setup (c);
  95         xcb_screen_t           *screen = xcb_setup_roots_iterator (setup).data;
  96
  97         /* Create the window */
  98
  99         uint32_t width;
 100         uint32_t height;
 101
 102         if (s_fullscreen) {
 103                 width = screen->width_in_pixels;
 104                 height = screen->height_in_pixels;
 105         } else {
 106                 width = 600;
 107                 height = 600;
 108         }
 109
 110         const uint32_t xcb_window_attrib_mask = XCB_CW_OVERRIDE_REDIRECT | XCB_CW_EVENT_MASK;
 111         const uint32_t xcb_window_attrib_list[] = {
 112                 // OVERRIDE_REDIRECT
 113                 0,
 114                 // EVENT_MASK
 115                 XCB_EVENT_MASK_EXPOSURE | XCB_EVENT_MASK_KEY_PRESS,
 116         };
 117
 118         xcb_window_t window = xcb_generate_id (c);
 119         xcb_create_window (c,                    /* Connection          */
 120                            XCB_COPY_FROM_PARENT,          /* depth (same as root)*/
 121                            window,                        /* window Id           */
 122                            screen->root,                  /* parent window       */
 123                            0, 0,                          /* x, y                */
 124                            width, height,                 /* width, height       */
 125                            0,                             /* border_width        */
 126                            XCB_WINDOW_CLASS_INPUT_OUTPUT, /* class               */
 127                            screen->root_visual,           /* visual              */
 128                            xcb_window_attrib_mask,
 129                            xcb_window_attrib_list);
 130
 131 #if 0 // Doesn't work
 132         if (s_fullscreen) {
 133
 134                 xcb_intern_atom_cookie_t cookie = xcb_intern_atom(c, 0, 12, "_NET_WM_STATE");
 135                 xcb_intern_atom_reply_t* reply = xcb_intern_atom_reply(c, cookie, 0);
 136
 137                 xcb_intern_atom_cookie_t cookie2 = xcb_intern_atom(c, 0, 24, "_NET_WM_STATE_FULLSCREEN");
 138                 xcb_intern_atom_reply_t* reply2 = xcb_intern_atom_reply(c, cookie2, 0);
 139
 140                 xcb_change_property(c, XCB_PROP_MODE_REPLACE, window, reply->atom, XCB_ATOM_ATOM , 32, 1, (void*)&reply2->atom);
 141         }
 142 #endif
 143
 144         xcb_map_window (c, window);
 145         xcb_flush (c);
 146
 147         main_loop(dpy, c, window, width, height);
 148
 149         xcb_flush(c);
 150         xcb_unmap_window(c, window);
 151         xcb_destroy_window(c, window);
 152
 153         XCloseDisplay(dpy);
 154 }