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