128 lines
4.4 KiB
C
128 lines
4.4 KiB
C
/*
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* xscreen.c - common X screen management
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*
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* Copyright © 2007-2008 Julien Danjou <julien@danjou.info>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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*/
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#include <xcb/xcb.h>
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#include <xcb/xinerama.h>
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#include "xscreen.h"
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#include "structs.h"
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extern awesome_t globalconf;
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static inline area_t
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screen_xsitoarea(xcb_xinerama_screen_info_t si)
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{
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area_t a;
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a.x = si.x_org;
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a.y = si.y_org;
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a.width = si.width;
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a.height = si.height;
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return a;
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}
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/** Get screens informations.
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* \return A pointer to complete screens_info_t structure.
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*/
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screens_info_t *
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screensinfo_new(void)
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{
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screens_info_t *si;
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xcb_xinerama_query_screens_reply_t *xsq;
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xcb_xinerama_screen_info_t *xsi;
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int xinerama_screen_number, screen, screen_to_test;
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xcb_screen_t *s;
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bool drop;
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xcb_xinerama_is_active_reply_t *xia = NULL;
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si = p_new(screens_info_t, 1);
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/* Check for extension before checking for Xinerama */
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if(xcb_get_extension_data(globalconf.connection, &xcb_xinerama_id)->present)
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{
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xia = xcb_xinerama_is_active_reply(globalconf.connection, xcb_xinerama_is_active(globalconf.connection), NULL);
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si->xinerama_is_active = xia->state;
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p_delete(&xia);
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}
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if(si->xinerama_is_active)
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{
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xsq = xcb_xinerama_query_screens_reply(globalconf.connection,
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xcb_xinerama_query_screens_unchecked(globalconf.connection),
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NULL);
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xsi = xcb_xinerama_query_screens_screen_info(xsq);
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xinerama_screen_number = xcb_xinerama_query_screens_screen_info_length(xsq);
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si->geometry = p_new(area_t, xinerama_screen_number);
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si->nscreen = 0;
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/* now check if screens overlaps (same x,y): if so, we take only the biggest one */
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for(screen = 0; screen < xinerama_screen_number; screen++)
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{
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drop = false;
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for(screen_to_test = 0; screen_to_test < si->nscreen; screen_to_test++)
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if(xsi[screen].x_org == si->geometry[screen_to_test].x
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&& xsi[screen].y_org == si->geometry[screen_to_test].y)
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{
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/* we already have a screen for this area, just check if
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* it's not bigger and drop it */
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drop = true;
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si->geometry[screen_to_test].width =
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MAX(xsi[screen].width, xsi[screen_to_test].width);
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si->geometry[screen_to_test].height =
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MAX(xsi[screen].height, xsi[screen_to_test].height);
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}
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if(!drop)
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si->geometry[si->nscreen++] = screen_xsitoarea(xsi[screen]);
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}
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/* realloc smaller if xinerama_screen_number != screen registered */
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if(xinerama_screen_number != si->nscreen)
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{
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area_t *newgeometry = p_new(area_t, si->nscreen);
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memcpy(newgeometry, si->geometry, si->nscreen * sizeof(area_t));
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p_delete(&si->geometry);
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si->geometry = newgeometry;
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}
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p_delete(&xsq);
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}
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else
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{
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si->nscreen = xcb_setup_roots_length(xcb_get_setup(globalconf.connection));
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si->geometry = p_new(area_t, si->nscreen);
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for(screen = 0; screen < si->nscreen; screen++)
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{
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s = xutil_screen_get(globalconf.connection, screen);
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si->geometry[screen].x = 0;
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si->geometry[screen].y = 0;
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si->geometry[screen].width = s->width_in_pixels;
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si->geometry[screen].height = s->height_in_pixels;
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}
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}
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return si;
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}
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// vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=80
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