diff options
Diffstat (limited to 'xinerama.c')
-rw-r--r-- | xinerama.c | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/xinerama.c b/xinerama.c new file mode 100644 index 0000000..91be487 --- /dev/null +++ b/xinerama.c @@ -0,0 +1,86 @@ +/* + * vim:ts=4:sw=4:expandtab + * + * © 2010-2012 Michael Stapelberg + * + * See LICENSE for licensing information + * + */ +#include <stdbool.h> +#include <stdlib.h> +#include <stdio.h> +#include <math.h> +#include <xcb/xcb.h> +#include <xcb/xinerama.h> + +#include "xcb.h" +#include "xinerama.h" + +/* Number of Xinerama screens which are currently present. */ +int xr_screens = 0; + +/* The resolutions of the currently present Xinerama screens. */ +Rect *xr_resolutions; + +static bool xinerama_active; + +void xinerama_init() { + if (!xcb_get_extension_data(conn, &xcb_xinerama_id)->present) { + printf("Xinerama extension not found, disabling.\n"); + return; + } + + xcb_xinerama_is_active_cookie_t cookie; + xcb_xinerama_is_active_reply_t *reply; + + cookie = xcb_xinerama_is_active(conn); + reply = xcb_xinerama_is_active_reply(conn, cookie, NULL); + if (!reply) + return; + + if (!reply->state) { + free(reply); + return; + } + + xinerama_active = true; +} + +void xinerama_query_screens() { + if (!xinerama_active) + return; + + xcb_xinerama_query_screens_cookie_t cookie; + xcb_xinerama_query_screens_reply_t *reply; + xcb_xinerama_screen_info_t *screen_info; + + cookie = xcb_xinerama_query_screens_unchecked(conn); + reply = xcb_xinerama_query_screens_reply(conn, cookie, NULL); + if (!reply) { + fprintf(stderr, "Couldn't get Xinerama screens\n"); + return; + } + screen_info = xcb_xinerama_query_screens_screen_info(reply); + int screens = xcb_xinerama_query_screens_screen_info_length(reply); + + Rect *resolutions = malloc(screens * sizeof(Rect)); + /* No memory? Just keep on using the old information. */ + if (!resolutions) { + free(reply); + return; + } + xr_resolutions = resolutions; + xr_screens = screens; + + for (int screen = 0; screen < xr_screens; screen++) { + xr_resolutions[screen].x = screen_info[screen].x_org; + xr_resolutions[screen].y = screen_info[screen].y_org; + xr_resolutions[screen].width = screen_info[screen].width; + xr_resolutions[screen].height = screen_info[screen].height; + printf("found Xinerama screen: %d x %d at %d x %d\n", + screen_info[screen].width, screen_info[screen].height, + screen_info[screen].x_org, screen_info[screen].y_org); + } + + free(reply); +} |