#include <math.h>
#include <xcb/xcb.h>
#include <xcb/xinerama.h>
+#include <xcb/randr.h>
#include "i3lock.h"
#include "xcb.h"
int xr_screens = 0;
/* The resolutions of the currently present Xinerama screens. */
-Rect *xr_resolutions;
+Rect *xr_resolutions = NULL;
static bool xinerama_active;
+static bool has_randr = false;
+static bool has_randr_1_5 = false;
extern bool debug_mode;
-void xinerama_init(void) {
+void _xinerama_init(void);
+
+void randr_init(int *event_base, xcb_window_t root) {
+ const xcb_query_extension_reply_t *extreply;
+
+ extreply = xcb_get_extension_data(conn, &xcb_randr_id);
+ if (!extreply->present) {
+ DEBUG("RandR is not present, falling back to Xinerama.\n");
+ _xinerama_init();
+ return;
+ }
+
+ xcb_generic_error_t *err;
+ xcb_randr_query_version_reply_t *randr_version =
+ xcb_randr_query_version_reply(
+ conn, xcb_randr_query_version(conn, XCB_RANDR_MAJOR_VERSION, XCB_RANDR_MINOR_VERSION), &err);
+ if (err != NULL) {
+ DEBUG("Could not query RandR version: X11 error code %d\n", err->error_code);
+ _xinerama_init();
+ return;
+ }
+
+ has_randr = true;
+
+ has_randr_1_5 = (randr_version->major_version >= 1) &&
+ (randr_version->minor_version >= 5);
+
+ free(randr_version);
+
+ if (event_base != NULL)
+ *event_base = extreply->first_event;
+
+ xcb_randr_select_input(conn, root,
+ XCB_RANDR_NOTIFY_MASK_SCREEN_CHANGE |
+ XCB_RANDR_NOTIFY_MASK_OUTPUT_CHANGE |
+ XCB_RANDR_NOTIFY_MASK_CRTC_CHANGE |
+ XCB_RANDR_NOTIFY_MASK_OUTPUT_PROPERTY);
+
+ xcb_flush(conn);
+}
+
+void _xinerama_init(void) {
if (!xcb_get_extension_data(conn, &xcb_xinerama_id)->present) {
DEBUG("Xinerama extension not found, disabling.\n");
return;
free(reply);
}
-void xinerama_query_screens(void) {
- if (!xinerama_active)
+/*
+ * randr_query_outputs_15 uses RandR ≥ 1.5 to update outputs.
+ *
+ */
+static bool _randr_query_monitors_15(xcb_window_t root) {
+#if XCB_RANDR_MINOR_VERSION < 5
+ return false;
+#else
+ /* RandR 1.5 available at compile-time, i.e. libxcb is new enough */
+ if (!has_randr_1_5) {
+ return false;
+ }
+ /* RandR 1.5 available at run-time (supported by the server) */
+ DEBUG("Querying monitors using RandR 1.5\n");
+ xcb_generic_error_t *err;
+ xcb_randr_get_monitors_reply_t *monitors =
+ xcb_randr_get_monitors_reply(
+ conn, xcb_randr_get_monitors(conn, root, true), &err);
+ if (err != NULL) {
+ DEBUG("Could not get RandR monitors: X11 error code %d\n", err->error_code);
+ free(err);
+ /* Fall back to RandR ≤ 1.4 */
+ return false;
+ }
+
+ int screens = xcb_randr_get_monitors_monitors_length(monitors);
+ DEBUG("%d RandR monitors found (timestamp %d)\n",
+ screens, monitors->timestamp);
+
+ Rect *resolutions = malloc(screens * sizeof(Rect));
+ /* No memory? Just keep on using the old information. */
+ if (!resolutions) {
+ free(monitors);
+ return true;
+ }
+
+ xcb_randr_monitor_info_iterator_t iter;
+ int screen;
+ for (iter = xcb_randr_get_monitors_monitors_iterator(monitors), screen = 0;
+ iter.rem;
+ xcb_randr_monitor_info_next(&iter), screen++) {
+ const xcb_randr_monitor_info_t *monitor_info = iter.data;
+
+ resolutions[screen].x = monitor_info->x;
+ resolutions[screen].y = monitor_info->y;
+ resolutions[screen].width = monitor_info->width;
+ resolutions[screen].height = monitor_info->height;
+ DEBUG("found RandR monitor: %d x %d at %d x %d\n",
+ monitor_info->width, monitor_info->height,
+ monitor_info->x, monitor_info->y);
+ }
+ free(xr_resolutions);
+ xr_resolutions = resolutions;
+ xr_screens = screens;
+
+ free(monitors);
+ return true;
+#endif
+}
+
+/*
+ * randr_query_outputs_14 uses RandR ≤ 1.4 to update outputs.
+ *
+ */
+static bool _randr_query_outputs_14(xcb_window_t root) {
+ if (!has_randr) {
+ return false;
+ }
+ DEBUG("Querying outputs using RandR ≤ 1.4\n");
+
+ /* Get screen resources (primary output, crtcs, outputs, modes) */
+ xcb_randr_get_screen_resources_current_cookie_t rcookie;
+ rcookie = xcb_randr_get_screen_resources_current(conn, root);
+
+ xcb_randr_get_screen_resources_current_reply_t *res =
+ xcb_randr_get_screen_resources_current_reply(conn, rcookie, NULL);
+ if (res == NULL) {
+ DEBUG("Could not query screen resources.\n");
+ return false;
+ }
+
+ /* timestamp of the configuration so that we get consistent replies to all
+ * requests (if the configuration changes between our different calls) */
+ const xcb_timestamp_t cts = res->config_timestamp;
+
+ const int len = xcb_randr_get_screen_resources_current_outputs_length(res);
+
+ /* an output is VGA-1, LVDS-1, etc. (usually physical video outputs) */
+ xcb_randr_output_t *randr_outputs = xcb_randr_get_screen_resources_current_outputs(res);
+
+ /* Request information for each output */
+ xcb_randr_get_output_info_cookie_t ocookie[len];
+ for (int i = 0; i < len; i++) {
+ ocookie[i] = xcb_randr_get_output_info(conn, randr_outputs[i], cts);
+ }
+ Rect *resolutions = malloc(len * sizeof(Rect));
+ /* No memory? Just keep on using the old information. */
+ if (!resolutions) {
+ free(res);
+ return true;
+ }
+
+ /* Loop through all outputs available for this X11 screen */
+ int screen = 0;
+
+ for (int i = 0; i < len; i++) {
+ xcb_randr_get_output_info_reply_t *output;
+
+ if ((output = xcb_randr_get_output_info_reply(conn, ocookie[i], NULL)) == NULL) {
+ continue;
+ }
+
+ if (output->crtc == XCB_NONE) {
+ free(output);
+ continue;
+ }
+
+ xcb_randr_get_crtc_info_cookie_t icookie;
+ xcb_randr_get_crtc_info_reply_t *crtc;
+ icookie = xcb_randr_get_crtc_info(conn, output->crtc, cts);
+ if ((crtc = xcb_randr_get_crtc_info_reply(conn, icookie, NULL)) == NULL) {
+ DEBUG("Skipping output: could not get CRTC (0x%08x)\n", output->crtc);
+ free(output);
+ continue;
+ }
+
+ resolutions[screen].x = crtc->x;
+ resolutions[screen].y = crtc->y;
+ resolutions[screen].width = crtc->width;
+ resolutions[screen].height = crtc->height;
+
+ DEBUG("found RandR output: %d x %d at %d x %d\n",
+ crtc->width, crtc->height,
+ crtc->x, crtc->y);
+
+ screen++;
+
+ free(crtc);
+
+ free(output);
+ }
+ free(xr_resolutions);
+ xr_resolutions = resolutions;
+ xr_screens = screen;
+ free(res);
+ return true;
+}
+
+void _xinerama_query_screens(void) {
+ 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;
-
+ xcb_generic_error_t *err;
cookie = xcb_xinerama_query_screens_unchecked(conn);
- reply = xcb_xinerama_query_screens_reply(conn, cookie, NULL);
+ reply = xcb_xinerama_query_screens_reply(conn, cookie, &err);
if (!reply) {
- if (debug_mode)
- fprintf(stderr, "Couldn't get Xinerama screens\n");
+ DEBUG("Couldn't get Xinerama screens: X11 error code %d\n", err->error_code);
+ free(err);
return;
}
screen_info = xcb_xinerama_query_screens_screen_info(reply);
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;
+ resolutions[screen].x = screen_info[screen].x_org;
+ resolutions[screen].y = screen_info[screen].y_org;
+ resolutions[screen].width = screen_info[screen].width;
+ resolutions[screen].height = screen_info[screen].height;
DEBUG("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(xr_resolutions);
+ xr_resolutions = resolutions;
+ xr_screens = screens;
+
free(reply);
}
+
+void randr_query(xcb_window_t root) {
+ if (_randr_query_monitors_15(root)) {
+ return;
+ }
+
+ if (_randr_query_outputs_14(root)) {
+ return;
+ }
+
+ _xinerama_query_screens();
+}
projects / i3 / i3lock / blobdiff