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| ** Copyright (C) 2016 The Qt Company Ltd. |
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| ** |
| ** This file is part of the plugins of the Qt Toolkit. |
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| ** $QT_BEGIN_LICENSE:LGPL$ |
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| ** |
| ** GNU General Public License Usage |
| ** Alternatively, this file may be used under the terms of the GNU |
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| ** Public license version 3 or any later version approved by the KDE Free |
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| ****************************************************************************/ |
| |
| #include "qeglfsx11integration.h" |
| #include <QThread> |
| |
| #include <X11/Xlib.h> |
| #include <X11/Xlib-xcb.h> |
| |
| /* Make no mistake: This is not a replacement for the xcb platform plugin. |
| This here is barely an extremely useful tool for developing eglfs itself because |
| it allows to do so without any requirements for devices or drivers. */ |
| |
| QT_BEGIN_NAMESPACE |
| |
| class EventReader : public QThread |
| { |
| public: |
| EventReader(QEglFSX11Integration *integration) |
| : m_integration(integration) { } |
| |
| void run() override; |
| |
| private: |
| QEglFSX11Integration *m_integration; |
| }; |
| |
| QAtomicInt running; |
| |
| void EventReader::run() |
| { |
| xcb_generic_event_t *event = nullptr; |
| while (running.loadRelaxed() && (event = xcb_wait_for_event(m_integration->connection()))) { |
| uint response_type = event->response_type & ~0x80; |
| switch (response_type) { |
| case XCB_CLIENT_MESSAGE: { |
| xcb_client_message_event_t *client = (xcb_client_message_event_t *) event; |
| const xcb_atom_t *atoms = m_integration->atoms(); |
| if (client->format == 32 |
| && client->type == atoms[Atoms::WM_PROTOCOLS] |
| && client->data.data32[0] == atoms[Atoms::WM_DELETE_WINDOW]) { |
| QWindow *window = m_integration->platformWindow() ? m_integration->platformWindow()->window() : nullptr; |
| if (window) |
| QWindowSystemInterface::handleCloseEvent(window); |
| } |
| break; |
| } |
| default: |
| break; |
| } |
| } |
| } |
| |
| void QEglFSX11Integration::sendConnectionEvent(xcb_atom_t a) |
| { |
| xcb_client_message_event_t event; |
| memset(&event, 0, sizeof(event)); |
| |
| event.response_type = XCB_CLIENT_MESSAGE; |
| event.format = 32; |
| event.sequence = 0; |
| event.window = m_connectionEventListener; |
| event.type = a; |
| |
| xcb_send_event(m_connection, false, m_connectionEventListener, XCB_EVENT_MASK_NO_EVENT, (const char *)&event); |
| xcb_flush(m_connection); |
| } |
| |
| #define DISPLAY ((Display *) m_display) |
| |
| void QEglFSX11Integration::platformInit() |
| { |
| m_display = XOpenDisplay(nullptr); |
| if (Q_UNLIKELY(!m_display)) |
| qFatal("Could not open display"); |
| |
| XSetEventQueueOwner(DISPLAY, XCBOwnsEventQueue); |
| m_connection = XGetXCBConnection(DISPLAY); |
| |
| running.ref(); |
| |
| xcb_screen_iterator_t it = xcb_setup_roots_iterator(xcb_get_setup(m_connection)); |
| |
| m_connectionEventListener = xcb_generate_id(m_connection); |
| xcb_create_window(m_connection, XCB_COPY_FROM_PARENT, |
| m_connectionEventListener, it.data->root, |
| 0, 0, 1, 1, 0, XCB_WINDOW_CLASS_INPUT_ONLY, |
| it.data->root_visual, 0, nullptr); |
| |
| m_eventReader = new EventReader(this); |
| m_eventReader->start(); |
| } |
| |
| void QEglFSX11Integration::platformDestroy() |
| { |
| running.deref(); |
| |
| sendConnectionEvent(XCB_ATOM_NONE); |
| |
| m_eventReader->wait(); |
| delete m_eventReader; |
| m_eventReader = nullptr; |
| |
| XCloseDisplay(DISPLAY); |
| m_display = nullptr; |
| m_connection = nullptr; |
| } |
| |
| EGLNativeDisplayType QEglFSX11Integration::platformDisplay() const |
| { |
| return DISPLAY; |
| } |
| |
| QSize QEglFSX11Integration::screenSize() const |
| { |
| if (m_screenSize.isEmpty()) { |
| QList<QByteArray> env = qgetenv("EGLFS_X11_SIZE").split('x'); |
| if (env.length() == 2) { |
| m_screenSize = QSize(env.at(0).toInt(), env.at(1).toInt()); |
| } else { |
| XWindowAttributes a; |
| if (XGetWindowAttributes(DISPLAY, DefaultRootWindow(DISPLAY), &a)) |
| m_screenSize = QSize(a.width, a.height); |
| } |
| } |
| return m_screenSize; |
| } |
| |
| EGLNativeWindowType QEglFSX11Integration::createNativeWindow(QPlatformWindow *platformWindow, |
| const QSize &size, |
| const QSurfaceFormat &format) |
| { |
| Q_UNUSED(format); |
| |
| m_platformWindow = platformWindow; |
| |
| xcb_screen_iterator_t it = xcb_setup_roots_iterator(xcb_get_setup(m_connection)); |
| m_window = xcb_generate_id(m_connection); |
| xcb_create_window(m_connection, XCB_COPY_FROM_PARENT, m_window, it.data->root, |
| 0, 0, size.width(), size.height(), 0, |
| XCB_WINDOW_CLASS_INPUT_OUTPUT, it.data->root_visual, |
| 0, nullptr); |
| |
| xcb_intern_atom_cookie_t cookies[Atoms::N_ATOMS]; |
| static const char *atomNames[Atoms::N_ATOMS] = { |
| "_NET_WM_NAME", |
| "UTF8_STRING", |
| "WM_PROTOCOLS", |
| "WM_DELETE_WINDOW", |
| "_NET_WM_STATE", |
| "_NET_WM_STATE_FULLSCREEN" |
| }; |
| |
| for (int i = 0; i < Atoms::N_ATOMS; ++i) { |
| cookies[i] = xcb_intern_atom(m_connection, false, strlen(atomNames[i]), atomNames[i]); |
| xcb_intern_atom_reply_t *reply = xcb_intern_atom_reply(m_connection, cookies[i], nullptr); |
| m_atoms[i] = reply->atom; |
| free(reply); |
| } |
| |
| // Set window title |
| xcb_change_property(m_connection, XCB_PROP_MODE_REPLACE, m_window, |
| m_atoms[Atoms::_NET_WM_NAME], m_atoms[Atoms::UTF8_STRING], 8, 5, "EGLFS"); |
| |
| // Enable WM_DELETE_WINDOW |
| xcb_change_property(m_connection, XCB_PROP_MODE_REPLACE, m_window, |
| m_atoms[Atoms::WM_PROTOCOLS], XCB_ATOM_ATOM, 32, 1, &m_atoms[Atoms::WM_DELETE_WINDOW]); |
| |
| // Go fullscreen. |
| xcb_change_property(m_connection, XCB_PROP_MODE_REPLACE, m_window, |
| m_atoms[Atoms::_NET_WM_STATE], XCB_ATOM_ATOM, 32, 1, &m_atoms[Atoms::_NET_WM_STATE_FULLSCREEN]); |
| |
| xcb_map_window(m_connection, m_window); |
| |
| xcb_flush(m_connection); |
| |
| return qt_egl_cast<EGLNativeWindowType>(m_window); |
| } |
| |
| void QEglFSX11Integration::destroyNativeWindow(EGLNativeWindowType window) |
| { |
| xcb_destroy_window(m_connection, qt_egl_cast<xcb_window_t>(window)); |
| } |
| |
| bool QEglFSX11Integration::hasCapability(QPlatformIntegration::Capability cap) const |
| { |
| Q_UNUSED(cap); |
| return false; |
| } |
| |
| QT_END_NAMESPACE |