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/* Copyright (c) 2012 Jess VanDerwalker
*
* rootimg.c
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use, copy,
* modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <stdlib.h>
#include <stdio.h>
#include <xcb/xcb.h>
#include <xcb/xcb_image.h>
#include <xcb/xcb_aux.h>
#include "util.h"
/* Main driver */
int
main (int argc, char **argv)
{
xcb_connection_t *conn;
int conn_screen;
xcb_screen_t *root_screen;
xcb_drawable_t root_window;
xcb_connection_t *conn_two;
int conn_two_screen;
xcb_screen_t *root_two_screen;
xcb_drawable_t root_two_window;
xcb_drawable_t window;
uint32_t mask;
uint32_t values[1];
xcb_void_cookie_t cookie;
xcb_get_geometry_reply_t *geom_reply;
xcb_generic_event_t *event;
image_data_t img_data;
xcb_image_t *image;
xcb_pixmap_t pixmap;
xcb_gcontext_t gc;
/* Check the first argument to see what display to connect to. If
empty, then use default display. */
if (argc > 1) {
conn = xcb_connect(argv[1], &conn_screen);
} else {
conn = xcb_connect(NULL, &conn_screen);
}
root_screen = xcb_aux_get_screen(conn, conn_screen);
root_window = root_screen->root;
/* Get the geometry of the root window */
geom_reply = GetWindowGeometry(conn, root_window);
WriteWindowInfo(conn, root_window);
WriteAllChildrenWindowInfo(conn, root_window);
img_data = GetWindowImageData(conn, root_window);
xcb_flush(conn);
/* Get the image of the root window */
image = xcb_image_get(conn,
root_window,
geom_reply->x,
geom_reply->y,
geom_reply->width,
geom_reply->height,
(unsigned int) ~0L,
XCB_IMAGE_FORMAT_Z_PIXMAP);
/* Set up the events the window will recognize */
mask = XCB_CW_EVENT_MASK;
values[0] = XCB_EVENT_MASK_EXPOSURE | XCB_EVENT_MASK_KEY_PRESS;
/* Create our new window on the default display. Make it half the size */
conn_two = xcb_connect(NULL, &conn_two_screen);
root_two_screen = xcb_aux_get_screen(conn_two, conn_two_screen);
root_two_window = root_two_screen->root;
window = xcb_generate_id(conn_two);
cookie = xcb_create_window_checked(conn_two,
XCB_COPY_FROM_PARENT,
window,
root_two_window,
geom_reply->x,
geom_reply->y,
geom_reply->width / 2,
geom_reply->height / 2,
geom_reply->border_width,
XCB_WINDOW_CLASS_INPUT_OUTPUT,
root_two_screen->root_visual,
mask,
values);
if (RequestCheck(conn_two, cookie, "Falied to create new window")) {
exit(1);
}
WriteWindowInfo(conn_two, window);
/* Map the window and flush the connection so it draws to the screen */
xcb_map_window(conn_two, window);
xcb_flush(conn_two);
WriteWindowInfo(conn_two, window);
/* Create the pixmap and associate it with our new window. */
pixmap = xcb_generate_id(conn_two);
cookie = xcb_create_pixmap(conn_two,
geom_reply->depth,
pixmap,
window,
geom_reply->width,
geom_reply->height);
if (RequestCheck(conn_two, cookie, "Failed to create pixmap")) {
exit(1);
}
/* Put the root_window image into the pixmap. Note that a gc is
* created, but I believe it is ignored. */
gc = xcb_generate_id(conn_two);
xcb_create_gc(conn_two, gc, window, 0, 0);
cookie = xcb_image_put(conn_two,
pixmap,
gc,
image,
0,
0,
0);
if (RequestCheck(conn_two, cookie, "Failed to put image into pixmap")) {
exit(1);
}
/* Copy the pixmap into the new window */
cookie = xcb_copy_area(conn_two,
pixmap,
window,
gc,
0,
0,
0,
0,
geom_reply->width / 2,
geom_reply->height / 2);
if (RequestCheck(conn_two, cookie, "Failed to put image into pixmap")) {
exit(1);
}
xcb_flush(conn_two);
WriteWindowInfo(conn_two, window);
/* Enter infinte loop so the window stays open */
while (1) {
}
/* Never get here, but if we could, would still want to clean up memory */
free(geom_reply);
xcb_disconnect(conn);
xcb_disconnect(conn_two);
return 0;
}
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