From 69a05d516bd0c7e369a0ba1fb78aac57a5ea26f2 Mon Sep 17 00:00:00 2001 From: Simeon Simeonov Date: Thu, 12 Mar 2020 12:30:51 +0100 Subject: Initial commit for the last i3lock commit at this time f3b061233e28ad0cf920c9421adc2459b6920812 --- randr.c | 297 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 297 insertions(+) create mode 100644 randr.c (limited to 'randr.c') diff --git a/randr.c b/randr.c new file mode 100644 index 0000000..4b1ea97 --- /dev/null +++ b/randr.c @@ -0,0 +1,297 @@ +/* + * vim:ts=4:sw=4:expandtab + * + * © 2010 Michael Stapelberg + * + * See LICENSE for licensing information + * + */ +#include +#include +#include +#include +#include +#include +#include + +#include "i3lock.h" +#include "xcb.h" +#include "randr.h" + +/* Number of Xinerama screens which are currently present. */ +int xr_screens = 0; + +/* The resolutions of the currently present Xinerama screens. */ +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 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; + } + + xcb_xinerama_is_active_cookie_t cookie; + xcb_xinerama_is_active_reply_t *reply; + + cookie = xcb_xinerama_is_active(conn); + reply = xcb_xinerama_is_active_reply(conn, cookie, NULL); + if (!reply) + return; + + if (!reply->state) { + free(reply); + return; + } + + xinerama_active = true; + free(reply); +} + +/* + * 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, &err); + if (!reply) { + 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); + int screens = xcb_xinerama_query_screens_screen_info_length(reply); + + Rect *resolutions = malloc(screens * sizeof(Rect)); + /* No memory? Just keep on using the old information. */ + if (!resolutions) { + free(reply); + return; + } + + for (int screen = 0; screen < xr_screens; screen++) { + 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(); +} -- cgit v1.3