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kwin/kcmkwin/kwincompositing/compositing.cpp
Martin Gräßlin 58668e52a0 [kcmkwin/compositing] Show warning message when selecting "dangerous" options 
The idea is to warn the user that changing the settings might break
the setup when we know it could be dangerous. The following cases are
considered:
* Scale filter Accurate
* Tearing prevention
* keep window thumbnail always
* EGL if EGL and GLX are available
* unredirect fullscreen not working on all hardware

In addition the OpenGL is Unsafe warning is turned int a KMessageWidget
which is also used for all the other warnings.

REVIEW: 118494
2014-06-16 09:04:33 +02:00

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/**************************************************************************
* KWin - the KDE window manager *
* This file is part of the KDE project. *
* *
* Copyright (C) 2013 Antonis Tsiapaliokas <kok3rs@gmail.com> *
* Copyright (C) 2013 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 "compositing.h"
#include <kwin_compositing_interface.h>
#include <KCModuleProxy>
#include <KConfigGroup>
#include <KLocalizedString>
#include <KSharedConfig>
#include <QDBusInterface>
#include <QDBusReply>
#include <QHash>
#include <QDebug>
namespace KWin {
namespace Compositing {
Compositing::Compositing(QObject *parent)
: QObject(parent)
, m_animationSpeed(0)
, m_windowThumbnail(0)
, m_glScaleFilter(0)
, m_xrScaleFilter(false)
, m_unredirectFullscreen(false)
, m_glSwapStrategy(0)
, m_glColorCorrection(false)
, m_compositingType(0)
, m_compositingEnabled(true)
, m_changed(false)
, m_openGLPlatformInterfaceModel(new OpenGLPlatformInterfaceModel(this))
, m_openGLPlatformInterface(0)
{
reset();
connect(this, &Compositing::animationSpeedChanged, this, &Compositing::changed);
connect(this, &Compositing::windowThumbnailChanged, this, &Compositing::changed);
connect(this, &Compositing::glScaleFilterChanged, this, &Compositing::changed);
connect(this, &Compositing::xrScaleFilterChanged, this, &Compositing::changed);
connect(this, &Compositing::unredirectFullscreenChanged, this, &Compositing::changed);
connect(this, &Compositing::glSwapStrategyChanged, this, &Compositing::changed);
connect(this, &Compositing::glColorCorrectionChanged, this, &Compositing::changed);
connect(this, &Compositing::compositingTypeChanged, this, &Compositing::changed);
connect(this, &Compositing::compositingEnabledChanged, this, &Compositing::changed);
connect(this, &Compositing::openGLPlatformInterfaceChanged, this, &Compositing::changed);
connect(this, &Compositing::changed, [this]{
m_changed = true;
});
}
void Compositing::reset()
{
KConfigGroup kwinConfig(KSharedConfig::openConfig(QStringLiteral("kwinrc")), QStringLiteral("Compositing"));
setAnimationSpeed(kwinConfig.readEntry("AnimationSpeed", 3));
setWindowThumbnail(kwinConfig.readEntry("HiddenPreviews", 5) - 4);
setGlScaleFilter(kwinConfig.readEntry("GLTextureFilter", 2));
setXrScaleFilter(kwinConfig.readEntry("XRenderSmoothScale", false));
setUnredirectFullscreen(kwinConfig.readEntry("UnredirectFullscreen", false));
setCompositingEnabled(kwinConfig.readEntry("Enabled", true));
auto swapStrategy = [&kwinConfig]() {
const QString glSwapStrategyValue = kwinConfig.readEntry("GLPreferBufferSwap", "a");
if (glSwapStrategyValue == "n") {
return 0;
} else if (glSwapStrategyValue == "a") {
return 1;
} else if (glSwapStrategyValue == "e") {
return 2;
} else if (glSwapStrategyValue == "p") {
return 3;
} else if (glSwapStrategyValue == "c") {
return 4;
}
return 0;
};
setGlSwapStrategy(swapStrategy());
setGlColorCorrection(kwinConfig.readEntry("GLColorCorrection", false));
auto type = [&kwinConfig]{
const QString backend = kwinConfig.readEntry("Backend", "OpenGL");
const bool glCore = kwinConfig.readEntry("GLCore", false);
if (backend == QStringLiteral("OpenGL")) {
if (glCore) {
return CompositingType::OPENGL31_INDEX;
} else {
return CompositingType::OPENGL20_INDEX;
}
} else {
return CompositingType::XRENDER_INDEX;
}
};
setCompositingType(type());
const QModelIndex index = m_openGLPlatformInterfaceModel->indexForKey(kwinConfig.readEntry("GLPlatformInterface", "glx"));
setOpenGLPlatformInterface(index.isValid() ? index.row() : 0);
m_changed = false;
}
void Compositing::defaults()
{
setAnimationSpeed(3);
setWindowThumbnail(1);
setGlScaleFilter(2);
setXrScaleFilter(false);
setUnredirectFullscreen(false);
setGlSwapStrategy(1);
setGlColorCorrection(false);
setCompositingType(CompositingType::OPENGL20_INDEX);
const QModelIndex index = m_openGLPlatformInterfaceModel->indexForKey(QStringLiteral("glx"));
setOpenGLPlatformInterface(index.isValid() ? index.row() : 0);
m_changed = true;
}
bool Compositing::OpenGLIsUnsafe() const
{
KConfigGroup kwinConfig(KSharedConfig::openConfig("kwinrc"), "Compositing");
return kwinConfig.readEntry("OpenGLIsUnsafe", true);
}
bool Compositing::OpenGLIsBroken()
{
OrgKdeKwinCompositingInterface interface(QStringLiteral("org.kde.KWin"),
QStringLiteral("/Compositor"),
QDBusConnection::sessionBus());
KConfigGroup kwinConfig(KSharedConfig::openConfig("kwinrc"), "Compositing");
QString oldBackend = kwinConfig.readEntry("Backend", "OpenGL");
kwinConfig.writeEntry("Backend", "OpenGL");
kwinConfig.sync();
if (interface.openGLIsBroken()) {
kwinConfig.writeEntry("Backend", oldBackend);
kwinConfig.sync();
return true;
}
kwinConfig.writeEntry("OpenGLIsUnsafe", false);
kwinConfig.sync();
return false;
}
void Compositing::reenableOpenGLDetection()
{
KConfigGroup kwinConfig(KSharedConfig::openConfig("kwinrc"), "Compositing");
kwinConfig.writeEntry("OpenGLIsUnsafe", false);
kwinConfig.sync();
}
int Compositing::animationSpeed() const
{
return m_animationSpeed;
}
int Compositing::windowThumbnail() const
{
return m_windowThumbnail;
}
int Compositing::glScaleFilter() const
{
return m_glScaleFilter;
}
bool Compositing::xrScaleFilter() const
{
return m_xrScaleFilter;
}
bool Compositing::unredirectFullscreen() const
{
return m_unredirectFullscreen;
}
int Compositing::glSwapStrategy() const
{
return m_glSwapStrategy;
}
bool Compositing::glColorCorrection() const
{
return m_glColorCorrection;
}
int Compositing::compositingType() const
{
return m_compositingType;
}
bool Compositing::compositingEnabled() const
{
return m_compositingEnabled;
}
void Compositing::setAnimationSpeed(int speed)
{
if (speed == m_animationSpeed) {
return;
}
m_animationSpeed = speed;
emit animationSpeedChanged(speed);
}
void Compositing::setGlColorCorrection(bool correction)
{
if (correction == m_glColorCorrection) {
return;
}
m_glColorCorrection = correction;
emit glColorCorrectionChanged(correction);
}
void Compositing::setGlScaleFilter(int index)
{
if (index == m_glScaleFilter) {
return;
}
m_glScaleFilter = index;
emit glScaleFilterChanged(index);
}
void Compositing::setGlSwapStrategy(int strategy)
{
if (strategy == m_glSwapStrategy) {
return;
}
m_glSwapStrategy = strategy;
emit glSwapStrategyChanged(strategy);
}
void Compositing::setUnredirectFullscreen(bool unredirect)
{
if (unredirect == m_unredirectFullscreen) {
return;
}
m_unredirectFullscreen = unredirect;
emit unredirectFullscreenChanged(unredirect);
}
void Compositing::setWindowThumbnail(int index)
{
if (index == m_windowThumbnail) {
return;
}
m_windowThumbnail = index;
emit windowThumbnailChanged(index);
}
void Compositing::setXrScaleFilter(bool filter)
{
if (filter == m_xrScaleFilter) {
return;
}
m_xrScaleFilter = filter;
emit xrScaleFilterChanged(filter);
}
void Compositing::setCompositingType(int index)
{
if (index == m_compositingType) {
return;
}
m_compositingType = index;
emit compositingTypeChanged(index);
}
void Compositing::setCompositingEnabled(bool enabled)
{
if (enabled == m_compositingEnabled) {
return;
}
m_compositingEnabled = enabled;
emit compositingEnabledChanged(enabled);
}
void Compositing::save()
{
KConfigGroup kwinConfig(KSharedConfig::openConfig(QStringLiteral("kwinrc")), "Compositing");
kwinConfig.writeEntry("AnimationSpeed", animationSpeed());
kwinConfig.writeEntry("HiddenPreviews", windowThumbnail() + 4);
kwinConfig.writeEntry("GLTextureFilter", glScaleFilter());
kwinConfig.writeEntry("XRenderSmoothScale", xrScaleFilter());
kwinConfig.writeEntry("UnredirectFullscreen", unredirectFullscreen());
kwinConfig.writeEntry("Enabled", compositingEnabled());
auto swapStrategy = [this] {
switch (glSwapStrategy()) {
case 0:
return QStringLiteral("n");
case 2:
return QStringLiteral("e");
case 3:
return QStringLiteral("p");
case 4:
return QStringLiteral("c");
case 1:
default:
return QStringLiteral("a");
}
};
kwinConfig.writeEntry("GLPreferBufferSwap", swapStrategy());
kwinConfig.writeEntry("GLColorCorrection", glColorCorrection());
QString backend;
bool glCore = false;
switch (compositingType()) {
case CompositingType::OPENGL31_INDEX:
backend = "OpenGL";
glCore = true;
break;
case CompositingType::OPENGL20_INDEX:
backend = "OpenGL";
glCore = false;
break;
case CompositingType::XRENDER_INDEX:
backend = "XRender";
glCore = false;
break;
}
kwinConfig.writeEntry("Backend", backend);
kwinConfig.writeEntry("GLCore", glCore);
const QModelIndex glIndex = m_openGLPlatformInterfaceModel->index(m_openGLPlatformInterface);
if (glIndex.isValid()) {
kwinConfig.writeEntry("GLPlatformInterface", glIndex.data(Qt::UserRole).toString());
}
kwinConfig.sync();
if (m_changed) {
// Send signal to all kwin instances
QDBusMessage message = QDBusMessage::createSignal(QStringLiteral("/Compositor"),
QStringLiteral("org.kde.kwin.Compositing"),
QStringLiteral("reinit"));
QDBusConnection::sessionBus().send(message);
m_changed = false;
}
}
OpenGLPlatformInterfaceModel *Compositing::openGLPlatformInterfaceModel() const
{
return m_openGLPlatformInterfaceModel;
}
int Compositing::openGLPlatformInterface() const
{
return m_openGLPlatformInterface;
}
void Compositing::setOpenGLPlatformInterface(int interface)
{
if (m_openGLPlatformInterface == interface) {
return;
}
m_openGLPlatformInterface = interface;
emit openGLPlatformInterfaceChanged(interface);
}
CompositingType::CompositingType(QObject *parent)
: QAbstractItemModel(parent) {
generateCompositing();
}
void CompositingType::generateCompositing()
{
QHash<QString, CompositingType::CompositingTypeIndex> compositingTypes;
compositingTypes[i18n("OpenGL 3.1")] = CompositingType::OPENGL31_INDEX;
compositingTypes[i18n("OpenGL 2.0")] = CompositingType::OPENGL20_INDEX;
compositingTypes[i18n("XRender")] = CompositingType::XRENDER_INDEX;
CompositingData data;
beginResetModel();
auto it = compositingTypes.begin();
while (it != compositingTypes.end()) {
data.name = it.key();
data.type = it.value();
m_compositingList << data;
it++;
}
qSort(m_compositingList.begin(), m_compositingList.end(), [](const CompositingData &a, const CompositingData &b) {
return a.type < b.type;
});
endResetModel();
}
QHash< int, QByteArray > CompositingType::roleNames() const
{
QHash<int, QByteArray> roleNames;
roleNames[NameRole] = "NameRole";
roleNames[TypeRole] = QByteArrayLiteral("type");
return roleNames;
}
QModelIndex CompositingType::index(int row, int column, const QModelIndex &parent) const
{
if (parent.isValid() || column > 0 || column < 0 || row < 0 || row >= m_compositingList.count()) {
return QModelIndex();
}
return createIndex(row, column);
}
QModelIndex CompositingType::parent(const QModelIndex &child) const
{
Q_UNUSED(child)
return QModelIndex();
}
int CompositingType::columnCount(const QModelIndex &parent) const
{
Q_UNUSED(parent)
return 1;
}
int CompositingType::rowCount(const QModelIndex &parent) const
{
if (parent.isValid()) {
return 0;
}
return m_compositingList.count();
}
QVariant CompositingType::data(const QModelIndex &index, int role) const
{
if (!index.isValid()) {
return QVariant();
}
switch (role) {
case Qt::DisplayRole:
case NameRole:
return m_compositingList.at(index.row()).name;
case TypeRole:
return m_compositingList.at(index.row()).type;
default:
return QVariant();
}
}
int CompositingType::compositingTypeForIndex(int row) const
{
return index(row, 0).data(TypeRole).toInt();
}
int CompositingType::indexForCompositingType(int type) const
{
for (int i = 0; i < m_compositingList.count(); ++i) {
if (m_compositingList.at(i).type == type) {
return i;
}
}
return -1;
}
OpenGLPlatformInterfaceModel::OpenGLPlatformInterfaceModel(QObject *parent)
: QAbstractListModel(parent)
{
beginResetModel();
OrgKdeKwinCompositingInterface interface(QStringLiteral("org.kde.KWin"),
QStringLiteral("/Compositor"),
QDBusConnection::sessionBus());
m_keys << interface.supportedOpenGLPlatformInterfaces();
for (const QString &key : m_keys) {
if (key == QStringLiteral("egl")) {
m_names << i18nc("OpenGL Platform Interface", "EGL");
} else if (key == QStringLiteral("glx")) {
m_names << i18nc("OpenGL Platform Interface", "GLX");
} else {
m_names << key;
}
}
endResetModel();
}
OpenGLPlatformInterfaceModel::~OpenGLPlatformInterfaceModel() = default;
int OpenGLPlatformInterfaceModel::rowCount(const QModelIndex &parent) const
{
if (parent.isValid()) {
return 0;
}
return m_keys.count();
}
QHash< int, QByteArray > OpenGLPlatformInterfaceModel::roleNames() const
{
return QHash<int, QByteArray>({
{Qt::DisplayRole, QByteArrayLiteral("display")},
{Qt::UserRole, QByteArrayLiteral("openglPlatformInterface")}
});
}
QVariant OpenGLPlatformInterfaceModel::data(const QModelIndex &index, int role) const
{
if (!index.isValid() || index.row() < 0 || index.row() >= m_keys.size() || index.column() != 0) {
return QVariant();
}
switch (role) {
case Qt::DisplayRole:
return m_names.at(index.row());
case Qt::UserRole:
return m_keys.at(index.row());
default:
return QVariant();
}
}
QModelIndex OpenGLPlatformInterfaceModel::indexForKey(const QString &key) const
{
const int keyIndex = m_keys.indexOf(key);
if (keyIndex < 0) {
return QModelIndex();
}
return createIndex(keyIndex, 0);
}
}//end namespace Compositing
}//end namespace KWin
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