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kwin/xcbutils.cpp

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/********************************************************************
KWin - the KDE window manager
This file is part of the KDE project.
Copyright (C) 2006 Lubos Lunak <l.lunak@kde.org>
Copyright (C) 2012 Martin Gräßlin <mgraesslin@kde.org>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*********************************************************************/
#include "xcbutils.h"
#include "utils.h"
// Qt
#include <QDebug>
// xcb
#include <xcb/composite.h>
#include <xcb/damage.h>
#include <xcb/randr.h>
#include <xcb/render.h>
#include <xcb/shape.h>
#include <xcb/sync.h>
#include <xcb/xfixes.h>
// system
#include <sys/shm.h>
#include <sys/types.h>
namespace KWin {
namespace Xcb {
static const int COMPOSITE_MAX_MAJOR = 0;
static const int COMPOSITE_MAX_MINOR = 4;
static const int DAMAGE_MAX_MAJOR = 1;
static const int DAMAGE_MIN_MAJOR = 1;
static const int SYNC_MAX_MAJOR = 3;
static const int SYNC_MAX_MINOR = 0;
static const int RANDR_MAX_MAJOR = 1;
static const int RANDR_MAX_MINOR = 4;
static const int RENDER_MAX_MAJOR = 0;
static const int RENDER_MAX_MINOR = 11;
static const int XFIXES_MAX_MAJOR = 5;
static const int XFIXES_MAX_MINOR = 0;
ExtensionData::ExtensionData()
: version(0)
, eventBase(0)
, errorBase(0)
, majorOpcode(0)
, present(0)
{
}
template<typename reply, typename T, typename F>
void Extensions::initVersion(T cookie, F f, ExtensionData *dataToFill)
{
ScopedCPointer<reply> version(f(connection(), cookie, NULL));
dataToFill->version = version->major_version * 0x10 + version->minor_version;
}
Extensions *Extensions::s_self = NULL;
Extensions *Extensions::self()
{
if (!s_self) {
s_self = new Extensions();
}
return s_self;
}
void Extensions::destroy()
{
delete s_self;
s_self = NULL;
}
Extensions::Extensions()
{
init();
}
Extensions::~Extensions()
{
}
void Extensions::init()
{
xcb_connection_t *c = connection();
xcb_prefetch_extension_data(c, &xcb_shape_id);
xcb_prefetch_extension_data(c, &xcb_randr_id);
xcb_prefetch_extension_data(c, &xcb_damage_id);
xcb_prefetch_extension_data(c, &xcb_composite_id);
xcb_prefetch_extension_data(c, &xcb_xfixes_id);
xcb_prefetch_extension_data(c, &xcb_render_id);
xcb_prefetch_extension_data(c, &xcb_sync_id);
m_shape.name = QByteArray("SHAPE");
m_randr.name = QByteArray("RANDR");
m_damage.name = QByteArray("DAMAGE");
m_composite.name = QByteArray("Composite");
m_fixes.name = QByteArray("XFIXES");
m_render.name = QByteArray("RENDER");
m_sync.name = QByteArray("SYNC");
extensionQueryReply(xcb_get_extension_data(c, &xcb_shape_id), &m_shape);
extensionQueryReply(xcb_get_extension_data(c, &xcb_randr_id), &m_randr);
extensionQueryReply(xcb_get_extension_data(c, &xcb_damage_id), &m_damage);
extensionQueryReply(xcb_get_extension_data(c, &xcb_composite_id), &m_composite);
extensionQueryReply(xcb_get_extension_data(c, &xcb_xfixes_id), &m_fixes);
extensionQueryReply(xcb_get_extension_data(c, &xcb_render_id), &m_render);
extensionQueryReply(xcb_get_extension_data(c, &xcb_sync_id), &m_sync);
// extension specific queries
xcb_shape_query_version_cookie_t shapeVersion;
xcb_randr_query_version_cookie_t randrVersion;
xcb_damage_query_version_cookie_t damageVersion;
xcb_composite_query_version_cookie_t compositeVersion;
xcb_xfixes_query_version_cookie_t xfixesVersion;
xcb_render_query_version_cookie_t renderVersion;
xcb_sync_initialize_cookie_t syncVersion;
if (m_shape.present) {
shapeVersion = xcb_shape_query_version_unchecked(c);
}
if (m_randr.present) {
randrVersion = xcb_randr_query_version_unchecked(c, RANDR_MAX_MAJOR, RANDR_MAX_MINOR);
xcb_randr_select_input(connection(), rootWindow(), XCB_RANDR_NOTIFY_MASK_SCREEN_CHANGE);
}
if (m_damage.present) {
damageVersion = xcb_damage_query_version_unchecked(c, DAMAGE_MAX_MAJOR, DAMAGE_MIN_MAJOR);
}
if (m_composite.present) {
compositeVersion = xcb_composite_query_version_unchecked(c, COMPOSITE_MAX_MAJOR, COMPOSITE_MAX_MINOR);
}
if (m_fixes.present) {
xfixesVersion = xcb_xfixes_query_version_unchecked(c, XFIXES_MAX_MAJOR, XFIXES_MAX_MINOR);
}
if (m_render.present) {
renderVersion = xcb_render_query_version_unchecked(c, RENDER_MAX_MAJOR, RENDER_MAX_MINOR);
}
if (m_sync.present) {
syncVersion = xcb_sync_initialize(c, SYNC_MAX_MAJOR, SYNC_MAX_MINOR);
}
// handle replies
if (m_shape.present) {
initVersion<xcb_shape_query_version_reply_t>(shapeVersion, &xcb_shape_query_version_reply, &m_shape);
}
if (m_randr.present) {
initVersion<xcb_randr_query_version_reply_t>(randrVersion, &xcb_randr_query_version_reply, &m_randr);
}
if (m_damage.present) {
initVersion<xcb_damage_query_version_reply_t>(damageVersion, &xcb_damage_query_version_reply, &m_damage);
}
if (m_composite.present) {
initVersion<xcb_composite_query_version_reply_t>(compositeVersion, &xcb_composite_query_version_reply, &m_composite);
}
if (m_fixes.present) {
initVersion<xcb_xfixes_query_version_reply_t>(xfixesVersion, &xcb_xfixes_query_version_reply, &m_fixes);
}
if (m_render.present) {
initVersion<xcb_render_query_version_reply_t>(renderVersion, &xcb_render_query_version_reply, &m_render);
}
if (m_sync.present) {
initVersion<xcb_sync_initialize_reply_t>(syncVersion, &xcb_sync_initialize_reply, &m_sync);
}
qDebug() << "Extensions: shape: 0x" << QString::number(m_shape.version, 16)
<< " composite: 0x" << QString::number(m_composite.version, 16)
<< " render: 0x" << QString::number(m_render.version, 16)
<< " fixes: 0x" << QString::number(m_fixes.version, 16)
<< " randr: 0x" << QString::number(m_randr.version, 16)
<< " sync: 0x" << QString::number(m_sync.version, 16)
<< " damage: 0x " << QString::number(m_damage.version, 16) << endl;
}
void Extensions::extensionQueryReply(const xcb_query_extension_reply_t *extension, ExtensionData *dataToFill)
{
if (!extension) {
return;
}
dataToFill->present = extension->present;
dataToFill->eventBase = extension->first_event;
dataToFill->errorBase = extension->first_error;
dataToFill->majorOpcode = extension->major_opcode;
}
int Extensions::damageNotifyEvent() const
{
return m_damage.eventBase + XCB_DAMAGE_NOTIFY;
}
bool Extensions::hasShape(xcb_window_t w) const
{
if (!isShapeAvailable()) {
return false;
}
ScopedCPointer<xcb_shape_query_extents_reply_t> extents(xcb_shape_query_extents_reply(
connection(), xcb_shape_query_extents_unchecked(connection(), w), NULL));
if (extents.isNull()) {
return false;
}
return extents->bounding_shaped > 0;
}
bool Extensions::isCompositeOverlayAvailable() const
{
return m_composite.version >= 0x03; // 0.3
}
bool Extensions::isFixesRegionAvailable() const
{
return m_fixes.version >= 0x30; // 3
}
int Extensions::fixesCursorNotifyEvent() const
{
return m_fixes.eventBase + XCB_XFIXES_CURSOR_NOTIFY;
}
bool Extensions::isShapeInputAvailable() const
{
return m_shape.version >= 0x11; // 1.1
}
int Extensions::randrNotifyEvent() const
{
return m_randr.eventBase + XCB_RANDR_SCREEN_CHANGE_NOTIFY;
}
int Extensions::shapeNotifyEvent() const
{
return m_shape.eventBase + XCB_SHAPE_NOTIFY;
}
int Extensions::syncAlarmNotifyEvent() const
{
return m_sync.eventBase + XCB_SYNC_ALARM_NOTIFY;
}
QVector<ExtensionData> Extensions::extensions() const
{
QVector<ExtensionData> extensions;
extensions << m_shape
<< m_randr
<< m_damage
<< m_composite
<< m_render
<< m_fixes
<< m_sync;
return extensions;
}
//****************************************
// Shm
//****************************************
Shm::Shm()
: m_shmId(-1)
, m_buffer(NULL)
, m_segment(XCB_NONE)
, m_valid(false)
, m_pixmapFormat(XCB_IMAGE_FORMAT_XY_BITMAP)
{
m_valid = init();
}
Shm::~Shm()
{
if (m_valid) {
xcb_shm_detach(connection(), m_segment);
shmdt(m_buffer);
}
}
bool Shm::init()
{
const xcb_query_extension_reply_t *ext = xcb_get_extension_data(connection(), &xcb_shm_id);
if (!ext || !ext->present) {
qDebug() << "SHM extension not available";
return false;
}
ScopedCPointer<xcb_shm_query_version_reply_t> version(xcb_shm_query_version_reply(connection(),
xcb_shm_query_version_unchecked(connection()), NULL));
if (version.isNull()) {
qDebug() << "Failed to get SHM extension version information";
return false;
}
m_pixmapFormat = version->pixmap_format;
const int MAXSIZE = 4096 * 2048 * 4; // TODO check there are not larger windows
m_shmId = shmget(IPC_PRIVATE, MAXSIZE, IPC_CREAT | 0600);
if (m_shmId < 0) {
qDebug() << "Failed to allocate SHM segment";
return false;
}
m_buffer = shmat(m_shmId, NULL, 0 /*read/write*/);
if (-1 == reinterpret_cast<long>(m_buffer)) {
qDebug() << "Failed to attach SHM segment";
shmctl(m_shmId, IPC_RMID, NULL);
return false;
}
shmctl(m_shmId, IPC_RMID, NULL);
m_segment = xcb_generate_id(connection());
const xcb_void_cookie_t cookie = xcb_shm_attach_checked(connection(), m_segment, m_shmId, false);
ScopedCPointer<xcb_generic_error_t> error(xcb_request_check(connection(), cookie));
if (!error.isNull()) {
qDebug() << "xcb_shm_attach error: " << error->error_code;
shmdt(m_buffer);
return false;
}
return true;
}
} // namespace Xcb
} // namespace KWin
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