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/****************************************************************************
**
** Copyright (C) 2021 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtCore module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:COMM$
**
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** $QT_END_LICENSE$
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
****************************************************************************/
#ifndef QXCBBASICCONNECTION_H
#define QXCBBASICCONNECTION_H
#include "qxcbatom.h"
#include "qxcbexport.h"
#include <QtCore/QPair>
#include <QtCore/QObject>
#include <QtCore/QByteArray>
#include <QtCore/QLoggingCategory>
#include <QtGui/private/qtguiglobal_p.h>
#include <xcb/xcb.h>
#include <memory>
QT_BEGIN_NAMESPACE
Q_DECLARE_LOGGING_CATEGORY(lcQpaXcb)
class Q_XCB_EXPORT QXcbBasicConnection : public QObject
{
Q_OBJECT
public:
QXcbBasicConnection(const char *displayName);
~QXcbBasicConnection();
#if QT_CONFIG(xcb_xlib)
void *xlib_display() const { return m_xlibDisplay; }
#endif
const char *displayName() const { return m_displayName.constData(); }
int primaryScreenNumber() const { return m_primaryScreenNumber; }
xcb_connection_t *xcb_connection() const { return m_xcbConnection; }
bool isConnected() const {
return m_xcbConnection && !xcb_connection_has_error(m_xcbConnection);
}
const xcb_setup_t *setup() const { return m_setup; }
size_t maxRequestDataBytes(size_t requestSize) const;
inline xcb_atom_t atom(QXcbAtom::Atom qatom) const { return m_xcbAtom.atom(qatom); }
QXcbAtom::Atom qatom(xcb_atom_t atom) const { return m_xcbAtom.qatom(atom); }
xcb_atom_t internAtom(const char *name);
QByteArray atomName(xcb_atom_t atom);
bool hasXFixes() const { return m_hasXFixes; }
bool hasXShape() const { return m_hasXhape; }
bool hasXRandr() const { return m_hasXRandr; }
bool hasInputShape() const { return m_hasInputShape; }
bool hasXKB() const { return m_hasXkb; }
bool hasXRender(int major = -1, int minor = -1) const {
if (m_hasXRender && major != -1 && minor != -1)
return m_xrenderVersion >= qMakePair(major, minor);
return m_hasXRender;
}
bool hasXInput2() const { return m_xi2Enabled; }
bool hasShm() const { return m_hasShm; }
bool hasShmFd() const { return m_hasShmFd; }
bool hasXSync() const { return m_hasXSync; }
bool hasXinerama() const { return m_hasXinerama; }
bool hasBigRequest() const;
bool isAtLeastXI21() const { return m_xi2Enabled && m_xi2Minor >= 1; }
bool isAtLeastXI22() const { return m_xi2Enabled && m_xi2Minor >= 2; }
bool isXIEvent(xcb_generic_event_t *event) const;
bool isXIType(xcb_generic_event_t *event, uint16_t type) const;
bool isXFixesType(uint responseType, int eventType) const;
bool isXRandrType(uint responseType, int eventType) const;
bool isXkbType(uint responseType) const; // https://bugs.freedesktop.org/show_bug.cgi?id=51295
protected:
void initializeShm();
void initializeXFixes();
void initializeXRender();
void initializeXRandr();
void initializeXinerama();
void initializeXShape();
void initializeXKB();
void initializeXSync();
void initializeXInput2();
private:
#if QT_CONFIG(xcb_xlib)
void *m_xlibDisplay = nullptr;
#endif
QByteArray m_displayName;
xcb_connection_t *m_xcbConnection = nullptr;
int m_primaryScreenNumber = 0;
const xcb_setup_t *m_setup = nullptr;
QXcbAtom m_xcbAtom;
bool m_hasXFixes = false;
bool m_hasXinerama = false;
bool m_hasXhape = false;
bool m_hasInputShape;
bool m_hasXRandr = false;
bool m_hasXkb = false;
bool m_hasXRender = false;
bool m_hasShm = false;
bool m_hasShmFd = false;
bool m_hasXSync = false;
QPair<int, int> m_xrenderVersion;
bool m_xi2Enabled = false;
int m_xi2Minor = -1;
int m_xiOpCode = -1;
uint32_t m_xinputFirstEvent = 0;
uint32_t m_xfixesFirstEvent = 0;
uint32_t m_xrandrFirstEvent = 0;
uint32_t m_xkbFirstEvent = 0;
uint32_t m_maximumRequestLength = 0;
};
#define Q_XCB_REPLY_CONNECTION_ARG(connection, ...) connection
struct QStdFreeDeleter {
void operator()(void *p) const noexcept { return std::free(p); }
};
#define Q_XCB_REPLY(call, ...) \
std::unique_ptr<call##_reply_t, QStdFreeDeleter>( \
call##_reply(Q_XCB_REPLY_CONNECTION_ARG(__VA_ARGS__), call(__VA_ARGS__), nullptr) \
)
#define Q_XCB_REPLY_UNCHECKED(call, ...) \
std::unique_ptr<call##_reply_t, QStdFreeDeleter>( \
call##_reply(Q_XCB_REPLY_CONNECTION_ARG(__VA_ARGS__), call##_unchecked(__VA_ARGS__), nullptr) \
)
QT_END_NAMESPACE
#endif // QXCBBASICCONNECTION_H
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