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/*
* Copyright 2017 © Samsung Research America, Silicon Valley
*
* Use of this source code is governed by the 3-Clause BSD license
* specified in the COPYING file included with this source code.
*/
#include <config.h>
#include <err.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "xcb.h"
#include "device_config.h"
bool
createXCBContextAndWindow(xcb_state_t *state, int width, int height)
{
xcb_screen_t *screen;
uint32_t mask[2];
const xcb_setup_t *setup;
xcb_visualtype_t *visual;
xcb_generic_event_t *event;
xcb_screen_iterator_t screen_iter;
xcb_depth_iterator_t depth_iter;
// Set up XCB
state->xcb_connection = xcb_connect(NULL, &state->xcb_screen_number);
if (state->xcb_connection == NULL) {
warnx("Could not create XCB context\n");
return false;
} else if (xcb_connection_has_error(state->xcb_connection)) {
warnx("Could not connect to X11 server\n");
return false;
}
// Set up screen
setup = xcb_get_setup(state->xcb_connection);
if (setup == NULL) {
warnx("Could not create XCB setup\n");
return false;
}
screen_iter = xcb_setup_roots_iterator(setup);
for (; screen_iter.rem; --state->xcb_screen_number, xcb_screen_next(&screen_iter)) {
if (state->xcb_screen_number == 0) {
state->xcb_screen = screen_iter.data;
break;
}
}
if (state->xcb_screen == NULL) {
warnx("Could not create XCB screen\n");
return false;
}
// Create window
state->xcb_window = xcb_generate_id(state->xcb_connection);
mask[0] = 1;
mask[1] = XCB_EVENT_MASK_EXPOSURE;
xcb_create_window(state->xcb_connection, // XCB connection to X11
XCB_COPY_FROM_PARENT, // Window's depth
state->xcb_window, // Window ID
state->xcb_screen->root, // Parent window
20, 20, // X, Y position
width, // Window width
height, // Window height
0, // Border width in pixels
XCB_WINDOW_CLASS_INPUT_OUTPUT, // Behavior class for window
state->xcb_screen->root_visual, // New window's visual id
XCB_CW_OVERRIDE_REDIRECT | XCB_CW_EVENT_MASK, // Mask type
mask); // Mask values list
xcb_map_window(state->xcb_connection, state->xcb_window);
xcb_flush(state->xcb_connection);
// Get the visual
depth_iter = xcb_screen_allowed_depths_iterator(state->xcb_screen);
for (; depth_iter.rem; xcb_depth_next(&depth_iter)) {
xcb_visualtype_iterator_t visual_iter;
visual_iter = xcb_depth_visuals_iterator(depth_iter.data);
for (; visual_iter.rem; xcb_visualtype_next(&visual_iter)) {
if (state->xcb_screen->root_visual == visual_iter.data->visual_id) {
state->xcb_visual_type = visual_iter.data;
return true;
}
}
}
warnx("XCB internal error, could not find visual\n");
xcb_disconnect(state->xcb_connection);
return false;
}
void
destroyXCBContextAndWindow (xcb_state_t *state)
{
xcb_disconnect(state->xcb_connection);
}
void
cleanup_state_xcb (void *data)
{
xcb_state_t *state = (xcb_state_t*)data;
destroyXCBContextAndWindow(state);
free(state);
}
/*
Local Variables:
mode:c++
c-file-style:"stroustrup"
c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
indent-tabs-mode:nil
fill-column:99
End:
*/
// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :
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