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279 lines
8.9 KiB
279 lines
8.9 KiB
/*
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* vim:ts=4:sw=4:expandtab
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*
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* © 2010 Michael Stapelberg
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*
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* xcb.c: contains all functions which use XCB to talk to X11. Mostly wrappers
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* around the rather complicated/ugly parts of the XCB API.
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*
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*/
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#include <xcb/xcb.h>
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#include <xcb/xcb_keysyms.h>
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#include <xcb/xcb_image.h>
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#include <xcb/dpms.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdbool.h>
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#include <unistd.h>
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#include <assert.h>
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#include <err.h>
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#include "cursors.h"
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#define curs_invisible_width 8
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#define curs_invisible_height 8
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static unsigned char curs_invisible_bits[] = {
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
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#define curs_windows_width 11
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#define curs_windows_height 19
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static unsigned char curs_windows_bits[] = {
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0xfe, 0x07, 0xfc, 0x07, 0xfa, 0x07, 0xf6, 0x07, 0xee, 0x07, 0xde, 0x07,
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0xbe, 0x07, 0x7e, 0x07, 0xfe, 0x06, 0xfe, 0x05, 0x3e, 0x00, 0xb6, 0x07,
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0x6a, 0x07, 0x6c, 0x07, 0xde, 0x06, 0xdf, 0x06, 0xbf, 0x05, 0xbf, 0x05,
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0x7f, 0x06 };
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#define mask_windows_width 11
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#define mask_windows_height 19
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static unsigned char mask_windows_bits[] = {
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0x01, 0x00, 0x03, 0x00, 0x07, 0x00, 0x0f, 0x00, 0x1f, 0x00, 0x3f, 0x00,
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0x7f, 0x00, 0xff, 0x00, 0xff, 0x01, 0xff, 0x03, 0xff, 0x07, 0x7f, 0x00,
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0xf7, 0x00, 0xf3, 0x00, 0xe1, 0x01, 0xe0, 0x01, 0xc0, 0x03, 0xc0, 0x03,
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0x80, 0x01 };
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static uint32_t get_colorpixel(char *hex) {
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char strgroups[3][3] = {{hex[0], hex[1], '\0'},
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{hex[2], hex[3], '\0'},
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{hex[4], hex[5], '\0'}};
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uint32_t rgb16[3] = {(strtol(strgroups[0], NULL, 16)),
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(strtol(strgroups[1], NULL, 16)),
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(strtol(strgroups[2], NULL, 16))};
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return (rgb16[0] << 16) + (rgb16[1] << 8) + rgb16[2];
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}
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xcb_visualtype_t *get_root_visual_type(xcb_screen_t *screen) {
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xcb_visualtype_t *visual_type = NULL;
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xcb_depth_iterator_t depth_iter;
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xcb_visualtype_iterator_t visual_iter;
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for (depth_iter = xcb_screen_allowed_depths_iterator(screen);
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depth_iter.rem;
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xcb_depth_next(&depth_iter)) {
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for (visual_iter = xcb_depth_visuals_iterator(depth_iter.data);
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visual_iter.rem;
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xcb_visualtype_next(&visual_iter)) {
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if (screen->root_visual != visual_iter.data->visual_id)
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continue;
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visual_type = visual_iter.data;
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return visual_type;
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}
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}
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return NULL;
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}
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xcb_window_t open_fullscreen_window(xcb_connection_t *conn, xcb_screen_t *scr, char *color) {
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uint32_t mask = 0;
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uint32_t values[3];
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xcb_window_t win = xcb_generate_id(conn);
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mask |= XCB_CW_BACK_PIXEL;
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values[0] = get_colorpixel(color);
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mask |= XCB_CW_OVERRIDE_REDIRECT;
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values[1] = 1;
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mask |= XCB_CW_EVENT_MASK;
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values[2] = XCB_EVENT_MASK_EXPOSURE |
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XCB_EVENT_MASK_KEY_PRESS |
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XCB_EVENT_MASK_KEY_RELEASE |
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XCB_EVENT_MASK_VISIBILITY_CHANGE;
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xcb_create_window(conn,
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24,
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win, /* the window id */
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scr->root, /* parent == root */
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0, 0,
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scr->width_in_pixels,
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scr->height_in_pixels, /* dimensions */
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0, /* border = 0, we draw our own */
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XCB_WINDOW_CLASS_INPUT_OUTPUT,
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XCB_WINDOW_CLASS_COPY_FROM_PARENT, /* copy visual from parent */
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mask,
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values);
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/* Map the window (= make it visible) */
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xcb_map_window(conn, win);
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/* Raise window (put it on top) */
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values[0] = XCB_STACK_MODE_ABOVE;
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xcb_configure_window(conn, win, XCB_CONFIG_WINDOW_STACK_MODE, values);
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return win;
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}
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/*
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* Returns the mask for Mode_switch (to be used for looking up keysymbols by
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* keycode).
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*
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*/
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uint32_t get_mod_mask(xcb_connection_t *conn, xcb_key_symbols_t *symbols, uint32_t keycode) {
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xcb_get_modifier_mapping_reply_t *modmap_r;
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xcb_keycode_t *modmap, kc;
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xcb_keycode_t *modeswitchcodes = xcb_key_symbols_get_keycode(symbols, keycode);
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if (modeswitchcodes == NULL)
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return 0;
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modmap_r = xcb_get_modifier_mapping_reply(conn, xcb_get_modifier_mapping(conn), NULL);
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modmap = xcb_get_modifier_mapping_keycodes(modmap_r);
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for (int i = 0; i < 8; i++)
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for (int j = 0; j < modmap_r->keycodes_per_modifier; j++) {
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kc = modmap[i * modmap_r->keycodes_per_modifier + j];
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for (xcb_keycode_t *ktest = modeswitchcodes; *ktest; ktest++) {
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if (*ktest != kc)
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continue;
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free(modeswitchcodes);
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free(modmap_r);
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return (1 << i);
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}
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}
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return 0;
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}
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void dpms_turn_off_screen(xcb_connection_t *conn) {
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xcb_dpms_enable(conn);
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xcb_dpms_force_level(conn, XCB_DPMS_DPMS_MODE_OFF);
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xcb_flush(conn);
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}
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/*
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* Repeatedly tries to grab pointer and keyboard (up to 1000 times).
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*
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*/
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void grab_pointer_and_keyboard(xcb_connection_t *conn, xcb_screen_t *screen, xcb_cursor_t cursor) {
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xcb_grab_pointer_cookie_t pcookie;
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xcb_grab_pointer_reply_t *preply;
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xcb_grab_keyboard_cookie_t kcookie;
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xcb_grab_keyboard_reply_t *kreply;
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int tries = 10000;
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while (tries-- > 0) {
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pcookie = xcb_grab_pointer(
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conn,
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false, /* get all pointer events specified by the following mask */
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screen->root, /* grab the root window */
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XCB_NONE, /* which events to let through */
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XCB_GRAB_MODE_ASYNC, /* pointer events should continue as normal */
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XCB_GRAB_MODE_ASYNC, /* keyboard mode */
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XCB_NONE, /* confine_to = in which window should the cursor stay */
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cursor, /* we change the cursor to whatever the user wanted */
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XCB_CURRENT_TIME
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);
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if ((preply = xcb_grab_pointer_reply(conn, pcookie, NULL)) &&
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preply->status == XCB_GRAB_STATUS_SUCCESS) {
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free(preply);
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break;
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}
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/* Make this quite a bit slower */
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usleep(50);
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}
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while (tries-- > 0) {
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kcookie = xcb_grab_keyboard(
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conn,
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true, /* report events */
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screen->root, /* grab the root window */
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XCB_CURRENT_TIME,
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XCB_GRAB_MODE_ASYNC, /* process events as normal, do not require sync */
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XCB_GRAB_MODE_ASYNC
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);
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if ((kreply = xcb_grab_keyboard_reply(conn, kcookie, NULL)) &&
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kreply->status == XCB_GRAB_STATUS_SUCCESS) {
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free(kreply);
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break;
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}
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/* Make this quite a bit slower */
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usleep(50);
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}
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if (tries <= 0)
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errx(EXIT_FAILURE, "Cannot grab pointer/keyboard");
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}
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xcb_cursor_t create_cursor(xcb_connection_t *conn, xcb_screen_t *screen, xcb_window_t win, int choice) {
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xcb_pixmap_t bitmap;
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xcb_pixmap_t mask;
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xcb_cursor_t cursor;
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unsigned char* curs_bits;
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unsigned char* mask_bits;
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int curs_w, curs_h;
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switch (choice) {
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case CURS_NONE:
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curs_bits = curs_invisible_bits;
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mask_bits = curs_invisible_bits;
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curs_w = curs_invisible_width;
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curs_h = curs_invisible_height;
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break;
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case CURS_WIN:
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curs_bits = curs_windows_bits;
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mask_bits = mask_windows_bits;
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curs_w = curs_windows_width;
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curs_h = curs_windows_height;
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break;
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case CURS_DEFAULT:
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default:
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return XCB_NONE; /* XCB_NONE is xcb's way of saying "don't change the cursor" */
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}
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bitmap = xcb_create_pixmap_from_bitmap_data(conn,
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win,
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curs_bits,
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curs_w,
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curs_h,
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1,
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screen->white_pixel,
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screen->black_pixel,
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NULL);
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mask = xcb_create_pixmap_from_bitmap_data(conn,
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win,
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mask_bits,
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curs_w,
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curs_h,
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1,
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screen->white_pixel,
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screen->black_pixel,
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NULL);
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cursor = xcb_generate_id(conn);
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xcb_create_cursor(conn,
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cursor,
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bitmap,
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mask,
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65535,65535,65535,
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0,0,0,
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0,0);
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xcb_free_pixmap(conn, bitmap);
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xcb_free_pixmap(conn, mask);
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return cursor;
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}
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