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demos: Create windows on the correct XCB screen.

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This commit is contained in:
Sven Hesse 2017-08-31 15:28:54 +02:00 committed by Henri Verbeet
parent 62bd4e6e63
commit e04b6a537c
1 changed files with 19 additions and 2 deletions
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21
demos/demo_xcb.h
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@ -33,6 +33,7 @@ struct demo
xcb_atom_t wm_protocols_atom;
xcb_atom_t wm_delete_window_atom;
xcb_key_symbols_t *xcb_keysyms;
int screen;
struct demo_window **windows;
size_t windows_size;
@ -130,6 +131,20 @@ static inline struct demo_window *demo_find_window(struct demo *demo, xcb_window
return NULL;
}
static inline xcb_screen_t *demo_get_screen(xcb_connection_t *c, int idx)
{
xcb_screen_iterator_t iter;
iter = xcb_setup_roots_iterator(xcb_get_setup(c));
for (; iter.rem; xcb_screen_next(&iter), --idx)
{
if (!idx)
return iter.data;
}
return NULL;
}
static inline struct demo_window *demo_window_create(struct demo *demo, const char *title,
unsigned int width, unsigned int height, void *user_data)
{
@ -139,6 +154,9 @@ static inline struct demo_window *demo_window_create(struct demo *demo, const ch
xcb_size_hints_t hints;
xcb_screen_t *screen;
if (!(screen = demo_get_screen(demo->connection, demo->screen)))
return NULL;
if (!(window = malloc(sizeof(*window))))
return NULL;
@ -153,7 +171,6 @@ static inline struct demo_window *demo_window_create(struct demo *demo, const ch
window->user_data = user_data;
window->expose_func = NULL;
window->key_press_func = NULL;
screen = xcb_setup_roots_iterator(xcb_get_setup(demo->connection)).data;
xcb_create_window(demo->connection, XCB_COPY_FROM_PARENT, window->window, screen->root, 0, 0,
width, height, 0, XCB_WINDOW_CLASS_INPUT_OUTPUT, screen->root_visual,
XCB_CW_EVENT_MASK, &window_events);
@ -250,7 +267,7 @@ static inline void demo_process_events(struct demo *demo)
static inline bool demo_init(struct demo *demo, void *user_data)
{
if (!(demo->connection = xcb_connect(NULL, NULL)))
if (!(demo->connection = xcb_connect(NULL, &demo->screen)))
return false;
if (xcb_connection_has_error(demo->connection) > 0)
goto fail;