104 lines
3.6 KiB
C++
104 lines
3.6 KiB
C++
/*
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SPDX-FileCopyrightText: 2014 Martin Gräßlin <mgraesslin@kde.org>
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SPDX-License-Identifier: GPL-2.0-only OR GPL-3.0-only OR LicenseRef-KDE-Accepted-GPL
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*/
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#include <cstdlib>
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#include <iostream>
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#include <xcb/xcb.h>
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#include <xcb/xcb_icccm.h>
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/*
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* This is a small test app to ensure that KWin calculates the size of a window correctly
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* according to ICCCM section 4.1.2.3
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*
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* The application creates a window and specifies the normal hints with:
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* * min size
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* * base size
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* * size increment
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*
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* With these normal flags the size should be calculated as:
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* width = base_width + (i * width_inc)
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* height = base_height + (j * height_inc)
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*
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* With i and j being non-negative integers!
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*
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* This application waits for configure notify events and calculates the i and j and
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* tries to calculate the size it expects. If it doesn't match it exits with a non-zero
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* exit code and prints the mismatching i and/or j value to stderr.
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*
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* To simply quit the application just click into the window. This will return with exit code 0.
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*/
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int main(int, char **)
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{
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int screenNumber;
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xcb_connection_t *c = xcb_connect(nullptr, &screenNumber);
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auto getScreen = [=]() {
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const xcb_setup_t *setup = xcb_get_setup(c);
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auto it = xcb_setup_roots_iterator (setup);
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for (int i = 0; i < screenNumber; ++i) {
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xcb_screen_next(&it);
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}
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return it.data;
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};
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xcb_screen_t *screen = getScreen();
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xcb_window_t w = xcb_generate_id(c);
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const uint32_t values[2] = {
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screen->white_pixel,
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XCB_EVENT_MASK_BUTTON_PRESS | XCB_EVENT_MASK_BUTTON_RELEASE | XCB_EVENT_MASK_STRUCTURE_NOTIFY
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};
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xcb_create_window(c, 0, w, screen->root, 0, 0, 365, 104, 0, XCB_WINDOW_CLASS_INPUT_OUTPUT,
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screen->root_visual, XCB_CW_BACK_PIXEL | XCB_CW_EVENT_MASK, values);
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// set the normal hints
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xcb_size_hints_t hints;
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hints.flags = XCB_ICCCM_SIZE_HINT_P_MIN_SIZE | XCB_ICCCM_SIZE_HINT_BASE_SIZE | XCB_ICCCM_SIZE_HINT_P_RESIZE_INC;
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hints.min_width = 365;
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hints.min_height = 104;
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hints.base_width = 15;
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hints.base_height = 64;
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hints.width_inc = 9;
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hints.height_inc = 18;
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xcb_icccm_set_wm_normal_hints(c, w, &hints);
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// and map the window
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xcb_map_window(c, w);
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xcb_flush(c);
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bool error = false;
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while (xcb_generic_event_t *event = xcb_wait_for_event(c)) {
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bool exit = false;
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if ((event->response_type & ~0x80) == XCB_BUTTON_RELEASE) {
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exit = true;
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} else if ((event->response_type & ~0x80) == XCB_CONFIGURE_NOTIFY) {
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auto *ce = reinterpret_cast<xcb_configure_notify_event_t*>(event);
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const double i = (ce->width - hints.base_width) / (double)hints.width_inc;
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const double j = (ce->height - hints.base_height) / (double)hints.height_inc;
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// according to ICCCM the size should be:
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// width = base_width + (i * width_inc)
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// height = base_height + (j * height_inc)
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// thus if the window manager configured correctly we get the same result
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if (hints.base_width + (int(i) * hints.width_inc) != ce->width) {
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std::cerr << "Incorrect width - i factor is " << i << std::endl;
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exit = true;
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error = true;
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}
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if (hints.base_height + (int(j) * hints.height_inc) != ce->height) {
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std::cerr << "Incorrect height - j factor is " << i << std::endl;
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exit = true;
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error = true;
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}
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}
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free(event);
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if (exit) {
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break;
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}
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}
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xcb_disconnect(c);
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return error ? 1 : 0;
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}
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