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87 lines
2.3 KiB
87 lines
2.3 KiB
13 years ago
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/*
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* vim:ts=4:sw=4:expandtab
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*
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* © 2010-2012 Michael Stapelberg
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*
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* See LICENSE for licensing information
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*
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*/
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#include <stdbool.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <math.h>
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#include <xcb/xcb.h>
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#include <xcb/xinerama.h>
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#include "xcb.h"
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#include "xinerama.h"
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/* Number of Xinerama screens which are currently present. */
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int xr_screens = 0;
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/* The resolutions of the currently present Xinerama screens. */
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Rect *xr_resolutions;
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static bool xinerama_active;
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void xinerama_init() {
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if (!xcb_get_extension_data(conn, &xcb_xinerama_id)->present) {
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printf("Xinerama extension not found, disabling.\n");
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return;
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}
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xcb_xinerama_is_active_cookie_t cookie;
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xcb_xinerama_is_active_reply_t *reply;
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cookie = xcb_xinerama_is_active(conn);
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reply = xcb_xinerama_is_active_reply(conn, cookie, NULL);
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if (!reply)
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return;
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if (!reply->state) {
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free(reply);
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return;
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}
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xinerama_active = true;
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}
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void xinerama_query_screens() {
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if (!xinerama_active)
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return;
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xcb_xinerama_query_screens_cookie_t cookie;
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xcb_xinerama_query_screens_reply_t *reply;
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xcb_xinerama_screen_info_t *screen_info;
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cookie = xcb_xinerama_query_screens_unchecked(conn);
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reply = xcb_xinerama_query_screens_reply(conn, cookie, NULL);
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if (!reply) {
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fprintf(stderr, "Couldn't get Xinerama screens\n");
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return;
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}
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screen_info = xcb_xinerama_query_screens_screen_info(reply);
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int screens = xcb_xinerama_query_screens_screen_info_length(reply);
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Rect *resolutions = malloc(screens * sizeof(Rect));
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/* No memory? Just keep on using the old information. */
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if (!resolutions) {
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free(reply);
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return;
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}
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xr_resolutions = resolutions;
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xr_screens = screens;
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for (int screen = 0; screen < xr_screens; screen++) {
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xr_resolutions[screen].x = screen_info[screen].x_org;
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xr_resolutions[screen].y = screen_info[screen].y_org;
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xr_resolutions[screen].width = screen_info[screen].width;
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xr_resolutions[screen].height = screen_info[screen].height;
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printf("found Xinerama screen: %d x %d at %d x %d\n",
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screen_info[screen].width, screen_info[screen].height,
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screen_info[screen].x_org, screen_info[screen].y_org);
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}
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free(reply);
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}
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