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/*
* vim:ts=4:sw=4:expandtab
*
* i3 - an improved dynamic tiling window manager
* © 2009 Michael Stapelberg and contributors (see also: LICENSE)
*
* This is LEGACY code (we support RandR, which can do much more than
* Xinerama), but necessary for the poor users of the nVidia binary
* driver which does not support RandR in 2011 *sigh*.
*
*/
#include "all.h"
#include <xcb/xinerama.h>
static int num_screens;
/*
* Looks in outputs for the Output whose start coordinates are x, y
*
*/
static Output *get_screen_at(unsigned int x, unsigned int y) {
Output *output;
TAILQ_FOREACH (output, &outputs, outputs) {
if (output->rect.x == x && output->rect.y == y) {
return output;
}
}
return NULL;
}
/*
* Gets the Xinerama screens and converts them to virtual Outputs (only one screen for two
* Xinerama screen which are configured in clone mode) in the given screenlist
*
*/
static void query_screens(xcb_connection_t *conn) {
xcb_xinerama_query_screens_reply_t *reply;
xcb_xinerama_screen_info_t *screen_info;
reply = xcb_xinerama_query_screens_reply(conn, xcb_xinerama_query_screens_unchecked(conn), NULL);
if (!reply) {
ELOG("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);
for (int screen = 0; screen < screens; screen++) {
Output *s = get_screen_at(screen_info[screen].x_org, screen_info[screen].y_org);
if (s != NULL) {
DLOG("Re-used old Xinerama screen %p\n", s);
/* This screen already exists. We use the littlest screen so that the user
can always see the complete workspace */
s->rect.width = min(s->rect.width, screen_info[screen].width);
s->rect.height = min(s->rect.height, screen_info[screen].height);
} else {
s = scalloc(1, sizeof(Output));
struct output_name *output_name = scalloc(1, sizeof(struct output_name));
sasprintf(&output_name->name, "xinerama-%d", num_screens);
SLIST_INIT(&s->names_head);
SLIST_INSERT_HEAD(&s->names_head, output_name, names);
DLOG("Created new Xinerama screen %s (%p)\n", output_primary_name(s), s);
s->active = true;
s->rect.x = screen_info[screen].x_org;
s->rect.y = screen_info[screen].y_org;
s->rect.width = screen_info[screen].width;
s->rect.height = screen_info[screen].height;
/* We always treat the screen at 0x0 as the primary screen */
if (s->rect.x == 0 && s->rect.y == 0) {
TAILQ_INSERT_HEAD(&outputs, s, outputs);
} else {
TAILQ_INSERT_TAIL(&outputs, s, outputs);
}
output_init_con(s);
init_ws_for_output(s);
num_screens++;
}
DLOG("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);
if (num_screens == 0) {
ELOG("No screens found. Please fix your setup. i3 will exit now.\n");
exit(EXIT_SUCCESS);
}
}
/*
* This creates the root_output (borrowed from randr.c) and uses it
* as the sole output for this session.
*
*/
static void use_root_output(xcb_connection_t *conn) {
Output *s = create_root_output(conn);
s->active = true;
TAILQ_INSERT_TAIL(&outputs, s, outputs);
output_init_con(s);
init_ws_for_output(s);
}
/*
* We have just established a connection to the X server and need the initial Xinerama
* information to setup workspaces for each screen.
*
*/
void xinerama_init(void) {
if (!xcb_get_extension_data(conn, &xcb_xinerama_id)->present) {
DLOG("Xinerama extension not found, using root output.\n");
use_root_output(conn);
} else {
xcb_xinerama_is_active_reply_t *reply;
reply = xcb_xinerama_is_active_reply(conn, xcb_xinerama_is_active(conn), NULL);
if (reply == NULL || !reply->state) {
DLOG("Xinerama is not active (in your X-Server), using root output.\n");
use_root_output(conn);
} else {
query_screens(conn);
}
FREE(reply);
}
}
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