1
2 #include <kms++util/kms++util.h>
3
4 #include "cube.h"
5 #include "cube-egl.h"
6 #include "cube-gles2.h"
7
8 #include <X11/Xlib-xcb.h>
9 #include <X11/Xlibint.h>
10
11 using namespace std;
12
main_loop(Display * dpy,xcb_connection_t * c,xcb_window_t window,uint32_t width,uint32_t height)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 || kp->detail == 9) {
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
main_x11()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 (s_fullscreen)
132 {
133 const char *net_wm_state = "_NET_WM_STATE";
134 const char *net_wm_state_fullscreen = "_NET_WM_STATE_FULLSCREEN";
135
136 xcb_intern_atom_cookie_t cookie = xcb_intern_atom(c, 0, strlen(net_wm_state), net_wm_state);
137 xcb_intern_atom_reply_t* reply = xcb_intern_atom_reply(c, cookie, 0);
138
139 xcb_intern_atom_cookie_t cookie2 = xcb_intern_atom(c, 0, strlen(net_wm_state_fullscreen), net_wm_state_fullscreen);
140 xcb_intern_atom_reply_t* reply2 = xcb_intern_atom_reply(c, cookie2, 0);
141
142 xcb_change_property(c, XCB_PROP_MODE_REPLACE, window, reply->atom, XCB_ATOM_ATOM , 32, 1, (void*)&reply2->atom);
143 }
144
145 xcb_map_window (c, window);
146 xcb_flush (c);
147
148 main_loop(dpy, c, window, width, height);
149
150 xcb_flush(c);
151 xcb_unmap_window(c, window);
152 xcb_destroy_window(c, window);
153
154 XCloseDisplay(dpy);
155 }
156