File indexing completed on 2024-05-12 09:36:14

 /*
  *  SPDX-FileCopyrightText: 2012 Alejandro Fiestas Olivares <afiestas@kde.org>
  *  SPDX-FileCopyrightText: 2012-2015 Daniel Vrátil <dvratil@redhat.com>
  *
  *  SPDX-License-Identifier: LGPL-2.1-or-later
  */
 #include "xrandrconfig.h"
 
 #include "xrandr.h"
 #include "xrandrmode.h"
 #include "xrandrscreen.h"
 
 #include "../xcbwrapper.h"
 
 #include "config.h"
 #include "edid.h"
 #include "mode.h"
 #include "output.h"
 #include "screen.h"
 
 #include <QRect>
 #include <QScopedPointer>
 #include <QtGui/private/qtx11extras_p.h>
 
 #include <optional>
 #include <utility>
 
 using namespace KScreen;
 
 XRandRConfig::XRandRConfig()
     : QObject()
     , m_screen(nullptr)
 {
     m_screen = new XRandRScreen(this);
 
     XCB::ScopedPointer<xcb_randr_get_screen_resources_reply_t> resources(XRandR::screenResources());
 
     xcb_randr_crtc_t *crtcs = xcb_randr_get_screen_resources_crtcs(resources.data());
     const int crtcsCount = xcb_randr_get_screen_resources_crtcs_length(resources.data());
     for (int i = 0; i < crtcsCount; ++i) {
         addNewCrtc(crtcs[i]);
     }
 
     xcb_randr_output_t *outputs = xcb_randr_get_screen_resources_outputs(resources.data());
     const int outputsCount = xcb_randr_get_screen_resources_outputs_length(resources.data());
     for (int i = 0; i < outputsCount; ++i) {
         addNewOutput(outputs[i]);
     }
 }
 
 XRandRConfig::~XRandRConfig()
 {
     qDeleteAll(m_outputs);
     qDeleteAll(m_crtcs);
     delete m_screen;
 }
 
 XRandROutput::Map XRandRConfig::outputs() const
 {
     return m_outputs;
 }
 
 XRandROutput *XRandRConfig::output(xcb_randr_output_t output) const
 {
     return m_outputs[output];
 }
 
 XRandRCrtc::Map XRandRConfig::crtcs() const
 {
     return m_crtcs;
 }
 
 XRandRCrtc *XRandRConfig::crtc(xcb_randr_crtc_t crtc) const
 {
     return m_crtcs[crtc];
 }
 
 XRandRScreen *XRandRConfig::screen() const
 {
     return m_screen;
 }
 
 void XRandRConfig::addNewOutput(xcb_randr_output_t id)
 {
     XRandROutput *xOutput = new XRandROutput(id, this);
     m_outputs.insert(id, xOutput);
 }
 
 void XRandRConfig::addNewCrtc(xcb_randr_crtc_t crtc)
 {
     m_crtcs.insert(crtc, new XRandRCrtc(crtc, this));
 }
 
 void XRandRConfig::removeOutput(xcb_randr_output_t id)
 {
     delete m_outputs.take(id);
 }
 
 KScreen::ConfigPtr XRandRConfig::toKScreenConfig() const
 {
     KScreen::ConfigPtr config(new KScreen::Config);
 
     const Config::Features features = Config::Feature::Writable | Config::Feature::PrimaryDisplay | Config::Feature::OutputReplication;
     config->setSupportedFeatures(features);
 
     KScreen::OutputList kscreenOutputs;
 
     for (const XRandROutput *output : std::as_const(m_outputs)) {
         KScreen::OutputPtr kscreenOutput = output->toKScreenOutput();
         kscreenOutputs.insert(kscreenOutput->id(), kscreenOutput);
     }
 
     config->setOutputs(kscreenOutputs);
     config->setScreen(m_screen->toKScreenScreen());
 
     return config;
 }
 
 void XRandRConfig::applyKScreenConfig(const KScreen::ConfigPtr &config)
 {
     config->adjustPriorities(); // never trust input
 
     const KScreen::OutputList kscreenOutputs = config->outputs();
 
     const QSize newScreenSize = screenSize(config);
     const QSize currentScreenSize = m_screen->currentSize();
 
     // When the current screen configuration is bigger than the new size (like
     // when rotating an output), the XSetScreenSize can fail or apply the smaller
     // size only partially, because we apply the size (we have to) before the
     // output changes. To prevent all kinds of weird screen sizes from happening,
     // we initially set such screen size, that it can take the current as well
     // as the new configuration, then we apply the output changes, and finally then
     // (if necessary) we reduce the screen size to fix the new configuration precisely.
     const QSize intermediateScreenSize =
         QSize(qMax(newScreenSize.width(), currentScreenSize.width()), qMax(newScreenSize.height(), currentScreenSize.height()));
 
     int neededCrtcs = 0;
 
     // pairs of before/after
     QMap<xcb_randr_output_t, std::pair<std::optional<uint32_t>, std::optional<uint32_t>>> prioritiesChange;
     for (const XRandROutput *xrandrOutput : std::as_const(m_outputs)) {
         prioritiesChange[xrandrOutput->id()].first = std::optional(xrandrOutput->priority());
     }
     for (const KScreen::OutputPtr &kscreenOutput : kscreenOutputs) {
         prioritiesChange[kscreenOutput->id()].second = std::optional(kscreenOutput->priority());
     }
     const bool prioritiesDiffer = std::any_of(prioritiesChange.cbegin(), prioritiesChange.cend(), [](const auto &pair) {
         const auto &[before, after] = pair;
         return !before.has_value() || !after.has_value() || before.value() != after.value();
     });
 
     KScreen::OutputList toDisable, toEnable, toChange;
 
     for (const KScreen::OutputPtr &kscreenOutput : kscreenOutputs) {
         xcb_randr_output_t outputId = kscreenOutput->id();
         XRandROutput *currentOutput = output(outputId);
 
         const bool currentEnabled = currentOutput->isEnabled();
 
         if (!kscreenOutput->isEnabled() && currentEnabled) {
             toDisable.insert(outputId, kscreenOutput);
             continue;
         } else if (kscreenOutput->isEnabled() && !currentEnabled) {
             toEnable.insert(outputId, kscreenOutput);
             ++neededCrtcs;
             continue;
         } else if (!kscreenOutput->isEnabled() && !currentEnabled) {
             continue;
         }
 
         ++neededCrtcs;
 
         if (kscreenOutput->currentModeId() != currentOutput->currentModeId()) {
             if (!toChange.contains(outputId)) {
                 toChange.insert(outputId, kscreenOutput);
             }
         }
 
         if (kscreenOutput->pos() != currentOutput->position()) {
             if (!toChange.contains(outputId)) {
                 toChange.insert(outputId, kscreenOutput);
             }
         }
 
         if (kscreenOutput->rotation() != currentOutput->rotation()) {
             if (!toChange.contains(outputId)) {
                 toChange.insert(outputId, kscreenOutput);
             }
         }
 
         if (kscreenOutput->explicitLogicalSize() != currentOutput->logicalSize()) {
             if (!toChange.contains(outputId)) {
                 toChange.insert(outputId, kscreenOutput);
             }
         }
 
         XRandRMode *currentMode = currentOutput->modes().value(kscreenOutput->currentModeId().toInt());
         // For some reason, in some environments currentMode is null
         // which doesn't make sense because it is the *current* mode...
         // Since we haven't been able to figure out the reason why
         // this happens, we are adding this debug code to try to
         // figure out how this happened.
         if (!currentMode) {
             qWarning() << "Current mode is null:"
                        << "ModeId:" << currentOutput->currentModeId() << "Mode: " << currentOutput->currentMode() << "Output: " << currentOutput->id();
             printConfig(config);
             printInternalCond();
             continue;
         }
 
         // When the output would not fit into new screen size, we need to disable and reposition it.
         const QRect geom = kscreenOutput->geometry();
         if (geom.right() > newScreenSize.width() || geom.bottom() > newScreenSize.height()) {
             if (!toDisable.contains(outputId)) {
                 qCDebug(KSCREEN_XRANDR) << "The new output would not fit into screen - new geometry: " << geom << ", new screen size:" << newScreenSize;
                 toDisable.insert(outputId, kscreenOutput);
             }
         }
     }
 
     const KScreen::ScreenPtr kscreenScreen = config->screen();
     if (newScreenSize.width() > kscreenScreen->maxSize().width() || newScreenSize.height() > kscreenScreen->maxSize().height()) {
         qCDebug(KSCREEN_XRANDR) << "The new screen size is too big - requested: " << newScreenSize << ", maximum: " << kscreenScreen->maxSize();
         return;
     }
 
     qCDebug(KSCREEN_XRANDR) << "Needed CRTCs: " << neededCrtcs;
 
     XCB::ScopedPointer<xcb_randr_get_screen_resources_reply_t> screenResources(XRandR::screenResources());
 
     if (neededCrtcs > screenResources->num_crtcs) {
         qCDebug(KSCREEN_XRANDR) << "We need more CRTCs than we have available - requested: " << neededCrtcs << ", available: " << screenResources->num_crtcs;
         return;
     }
 
     qCDebug(KSCREEN_XRANDR) << "Actions to perform:\n"
                             << "\tPriorities:" << prioritiesDiffer;
     for (auto it = prioritiesChange.constBegin(); it != prioritiesChange.constEnd(); it++) {
         const auto &[before, after] = it.value();
         if (before != after) {
             qCDebug(KSCREEN_XRANDR) << "\tOutput" << it.key() << "\n"
                                     << "\t\tOld:" << (before.has_value() ? QString::number(before.value()) : QStringLiteral("none")) << "\n"
                                     << "\t\tNew:" << (after.has_value() ? QString::number(after.value()) : QStringLiteral("none"));
         }
     }
 
     qCDebug(KSCREEN_XRANDR) << "\tChange Screen Size:" << (newScreenSize != currentScreenSize);
     if (newScreenSize != currentScreenSize) {
         qCDebug(KSCREEN_XRANDR) << "\t\tOld:" << currentScreenSize << "\n"
                                 << "\t\tIntermediate:" << intermediateScreenSize << "\n"
                                 << "\t\tNew:" << newScreenSize;
     }
 
     qCDebug(KSCREEN_XRANDR) << "\tDisable outputs:" << !toDisable.isEmpty();
     if (!toDisable.isEmpty()) {
         qCDebug(KSCREEN_XRANDR) << "\t\t" << toDisable.keys();
     }
 
     qCDebug(KSCREEN_XRANDR) << "\tChange outputs:" << !toChange.isEmpty();
     if (!toChange.isEmpty()) {
         qCDebug(KSCREEN_XRANDR) << "\t\t" << toChange.keys();
     }
 
     qCDebug(KSCREEN_XRANDR) << "\tEnable outputs:" << !toEnable.isEmpty();
     if (!toEnable.isEmpty()) {
         qCDebug(KSCREEN_XRANDR) << "\t\t" << toEnable.keys();
     }
 
     // Grab the server so that no-one else can do changes to XRandR and to block
     // change notifications until we are done
     XCB::GrabServer grabber;
 
     // If there is nothing to do, not even bother
     if (!prioritiesDiffer && toDisable.isEmpty() && toEnable.isEmpty() && toChange.isEmpty()) {
         if (newScreenSize != currentScreenSize) {
             setScreenSize(newScreenSize);
         }
         return;
     }
 
     for (const KScreen::OutputPtr &output : toDisable) {
         disableOutput(output);
     }
 
     if (intermediateScreenSize != currentScreenSize) {
         setScreenSize(intermediateScreenSize);
     }
 
     bool forceScreenSizeUpdate = false;
 
     for (const KScreen::OutputPtr &output : toChange) {
         if (!changeOutput(output)) {
             /* If we disabled the output before changing it and XRandR failed
              * to re-enable it, then update screen size too */
             if (toDisable.contains(output->id())) {
                 output->setEnabled(false);
                 qCDebug(KSCREEN_XRANDR) << "Output failed to change: " << output->name();
                 forceScreenSizeUpdate = true;
             }
         }
     }
 
     for (const KScreen::OutputPtr &output : toEnable) {
         if (!enableOutput(output)) {
             qCDebug(KSCREEN_XRANDR) << "Output failed to be Enabled: " << output->name();
             forceScreenSizeUpdate = true;
         }
     }
 
     for (auto it = prioritiesChange.constBegin(); it != prioritiesChange.constEnd(); it++) {
         const xcb_randr_output_t outputId = it.key();
         const auto &[before, after] = it.value();
         const uint32_t priority = after.value_or(0);
         setOutputPriority(outputId, priority);
     }
 
     if (forceScreenSizeUpdate || intermediateScreenSize != newScreenSize) {
         QSize newSize = newScreenSize;
         if (forceScreenSizeUpdate) {
             newSize = screenSize(config);
             qCDebug(KSCREEN_XRANDR) << "Forced to change screen size: " << newSize;
         }
         setScreenSize(newSize);
     }
 }
 
 void XRandRConfig::printConfig(const ConfigPtr &config) const
 {
     qCDebug(KSCREEN_XRANDR) << "KScreen version:" /*<< LIBKSCREEN_VERSION*/;
 
     if (!config) {
         qCDebug(KSCREEN_XRANDR) << "Config is invalid";
         return;
     }
     if (!config->screen()) {
         qCDebug(KSCREEN_XRANDR) << "No screen in the configuration, broken backend";
         return;
     }
 
     qCDebug(KSCREEN_XRANDR) << "Screen:"
                             << "\n"
                             << "\tmaxSize:" << config->screen()->maxSize() << "\n"
                             << "\tminSize:" << config->screen()->minSize() << "\n"
                             << "\tcurrentSize:" << config->screen()->currentSize();
 
     const OutputList outputs = config->outputs();
     for (const OutputPtr &output : outputs) {
         qCDebug(KSCREEN_XRANDR) << "\n-----------------------------------------------------\n"
                                 << "\n"
                                 << "Id: " << output->id() << "\n"
                                 << "Name: " << output->name() << "\n"
                                 << "Type: " << output->type() << "\n"
                                 << "Connected: " << output->isConnected();
 
         if (!output->isConnected()) {
             continue;
         }
 
         qCDebug(KSCREEN_XRANDR) << "Enabled: " << output->isEnabled() << "\n"
                                 << "Priority: " << output->priority() << "\n"
                                 << "Rotation: " << output->rotation() << "\n"
                                 << "Pos: " << output->pos() << "\n"
                                 << "MMSize: " << output->sizeMm();
         if (output->currentMode()) {
             qCDebug(KSCREEN_XRANDR) << "Size: " << output->currentMode()->size();
         }
 
         qCDebug(KSCREEN_XRANDR) << "Clones: " << (output->clones().isEmpty() ? QStringLiteral("None") : QString::number(output->clones().count())) << "\n"
                                 << "Mode: " << output->currentModeId() << "\n"
                                 << "Preferred Mode: " << output->preferredModeId() << "\n"
                                 << "Preferred modes: " << output->preferredModes() << "\n"
                                 << "Modes: ";
 
         ModeList modes = output->modes();
         for (const ModePtr &mode : modes) {
             qCDebug(KSCREEN_XRANDR) << "\t" << mode->id() << "  " << mode->name() << " " << mode->size() << " " << mode->refreshRate();
         }
 
         Edid *edid = output->edid();
         qCDebug(KSCREEN_XRANDR) << "EDID Info: ";
         if (edid && edid->isValid()) {
             qCDebug(KSCREEN_XRANDR) << "\tDevice ID: " << edid->deviceId() << "\n"
                                     << "\tName: " << edid->name() << "\n"
                                     << "\tVendor: " << edid->vendor() << "\n"
                                     << "\tSerial: " << edid->serial() << "\n"
                                     << "\tEISA ID: " << edid->eisaId() << "\n"
                                     << "\tHash: " << edid->hash() << "\n"
                                     << "\tWidth: " << edid->width() << "\n"
                                     << "\tHeight: " << edid->height() << "\n"
                                     << "\tGamma: " << edid->gamma() << "\n"
                                     << "\tRed: " << edid->red() << "\n"
                                     << "\tGreen: " << edid->green() << "\n"
                                     << "\tBlue: " << edid->blue() << "\n"
                                     << "\tWhite: " << edid->white();
         } else {
             qCDebug(KSCREEN_XRANDR) << "\tUnavailable";
         }
     }
 }
 
 void XRandRConfig::printInternalCond() const
 {
     qCDebug(KSCREEN_XRANDR) << "Internal config in xrandr";
     for (const XRandROutput *output : m_outputs) {
         qCDebug(KSCREEN_XRANDR) << "Id: " << output->id() << "\n"
                                 << "Current Mode: " << output->currentMode() << "\n"
                                 << "Current mode id: " << output->currentModeId() << "\n"
                                 << "Connected: " << output->isConnected() << "\n"
                                 << "Enabled: " << output->isEnabled() << "\n"
                                 << "Priority: " << output->priority();
         if (!output->isEnabled()) {
             continue;
         }
 
         XRandRMode::Map modes = output->modes();
         for (const XRandRMode *mode : modes) {
             qCDebug(KSCREEN_XRANDR) << "\t" << mode->id() << "\n"
                                     << "\t" << mode->name() << "\n"
                                     << "\t" << mode->size() << mode->refreshRate();
         }
     }
 }
 
 QSize XRandRConfig::screenSize(const KScreen::ConfigPtr &config) const
 {
     QRect rect;
     for (const KScreen::OutputPtr &output : config->outputs()) {
         if (!output->isConnected() || !output->isEnabled()) {
             continue;
         }
 
         const ModePtr currentMode = output->currentMode();
         if (!currentMode) {
             qCDebug(KSCREEN_XRANDR) << "Output: " << output->name() << " has no current Mode!";
             continue;
         }
 
         const QRect outputGeom = output->geometry();
         rect = rect.united(outputGeom);
     }
 
     const QSize size = QSize(rect.width(), rect.height());
     qCDebug(KSCREEN_XRANDR) << "Requested screen size is" << size;
     return size;
 }
 
 bool XRandRConfig::setScreenSize(const QSize &size) const
 {
     const double dpi = 25.4 * XRandR::screen()->height_in_pixels / XRandR::screen()->height_in_millimeters;
     const int widthMM = (25.4 * size.width()) / dpi;
     const int heightMM = (25.4 * size.height()) / dpi;
 
     qCDebug(KSCREEN_XRANDR) << "RRSetScreenSize"
                             << "\n"
                             << "\tDPI:" << dpi << "\n"
                             << "\tSize:" << size << "\n"
                             << "\tSizeMM:" << QSize(widthMM, heightMM);
 
     xcb_randr_set_screen_size(XCB::connection(), XRandR::rootWindow(), size.width(), size.height(), widthMM, heightMM);
     m_screen->update(size);
     return true;
 }
 
 void XRandRConfig::setOutputPriority(xcb_randr_output_t outputId, uint32_t priority) const
 {
     qCDebug(KSCREEN_XRANDR) << "RRSetOutputPrimary"
                             << "\n"
                             << "\tNew priority:" << priority;
 
     if (m_outputs.contains(outputId)) {
         m_outputs[outputId]->setPriority(priority);
     }
 }
 
 bool XRandRConfig::disableOutput(const OutputPtr &kscreenOutput) const
 {
     XRandROutput *xOutput = output(kscreenOutput->id());
     Q_ASSERT(xOutput);
     Q_ASSERT(xOutput->crtc());
 
     if (!xOutput->crtc()) {
         qCWarning(KSCREEN_XRANDR) << "Attempting to disable output without CRTC, wth?";
         return false;
     }
 
     const xcb_randr_crtc_t crtc = xOutput->crtc()->crtc();
 
     qCDebug(KSCREEN_XRANDR) << "RRSetCrtcConfig (disable output)"
                             << "\n"
                             << "\tCRTC:" << crtc;
 
     xOutput->setPriority(0);
 
     auto cookie = xcb_randr_set_crtc_config(XCB::connection(), //
                                             crtc,
                                             XCB_CURRENT_TIME,
                                             XCB_CURRENT_TIME,
                                             0,
                                             0,
                                             XCB_NONE,
                                             XCB_RANDR_ROTATION_ROTATE_0,
                                             0,
                                             nullptr);
 
     XCB::ScopedPointer<xcb_randr_set_crtc_config_reply_t> reply(xcb_randr_set_crtc_config_reply(XCB::connection(), cookie, nullptr));
 
     if (!reply) {
         qCDebug(KSCREEN_XRANDR) << "\tResult: unknown (error)";
         return false;
     }
     qCDebug(KSCREEN_XRANDR) << "\tResult:" << reply->status;
 
     // Update the cached output now, otherwise we get RRNotify_CrtcChange notification
     // for an outdated output, which can lead to a crash.
     if (reply->status == XCB_RANDR_SET_CONFIG_SUCCESS) {
         xOutput->update(XCB_NONE, XCB_NONE, xOutput->isConnected() ? XCB_RANDR_CONNECTION_CONNECTED : XCB_RANDR_CONNECTION_DISCONNECTED);
         if (xOutput->crtc())
             xOutput->crtc()->updateTimestamp(reply->timestamp);
     }
     return (reply->status == XCB_RANDR_SET_CONFIG_SUCCESS);
 }
 
 bool XRandRConfig::enableOutput(const OutputPtr &kscreenOutput) const
 {
     XRandRCrtc *freeCrtc = nullptr;
     qCDebug(KSCREEN_XRANDR) << m_crtcs;
 
     for (XRandRCrtc *crtc : m_crtcs) {
         crtc->update();
         qCDebug(KSCREEN_XRANDR) << "Testing CRTC" << crtc->crtc() << "\n"
                                 << "\tFree:" << crtc->isFree() << "\n"
                                 << "\tMode:" << crtc->mode() << "\n"
                                 << "\tPossible outputs:" << crtc->possibleOutputs() << "\n"
                                 << "\tConnected outputs:" << crtc->outputs() << "\n"
                                 << "\tGeometry:" << crtc->geometry();
 
         if (crtc->isFree() && crtc->possibleOutputs().contains(kscreenOutput->id())) {
             freeCrtc = crtc;
             break;
         }
     }
 
     if (!freeCrtc) {
         qCWarning(KSCREEN_XRANDR) << "Failed to get free CRTC for output" << kscreenOutput->id();
         return false;
     }
 
     XRandROutput *xOutput = output(kscreenOutput->id());
     const int modeId = kscreenOutput->currentMode() ? kscreenOutput->currentModeId().toInt() : kscreenOutput->preferredModeId().toInt();
     xOutput->updateLogicalSize(kscreenOutput, freeCrtc);
 
     qCDebug(KSCREEN_XRANDR) << "RRSetCrtcConfig (enable output)"
                             << "\n"
                             << "\tOutput:" << kscreenOutput->id() << "(" << kscreenOutput->name() << ")"
                             << "\n"
                             << "\tNew CRTC:" << freeCrtc->crtc() << "\n"
                             << "\tPos:" << kscreenOutput->pos() << "\n"
                             << "\tMode:" << kscreenOutput->currentMode() << "Preferred:" << kscreenOutput->preferredModeId() << "\n"
                             << "\tRotation:" << kscreenOutput->rotation();
 
     if (!sendConfig(kscreenOutput, freeCrtc)) {
         return false;
     }
 
     xOutput->update(freeCrtc->crtc(), modeId, XCB_RANDR_CONNECTION_CONNECTED);
     xOutput->setPriority(kscreenOutput->priority());
     return true;
 }
 
 bool XRandRConfig::changeOutput(const KScreen::OutputPtr &kscreenOutput) const
 {
     XRandROutput *xOutput = output(kscreenOutput->id());
     Q_ASSERT(xOutput);
 
     if (!xOutput->crtc()) {
         qCDebug(KSCREEN_XRANDR) << "Output" << kscreenOutput->id() << "has no CRTC, falling back to enableOutput()";
         return enableOutput(kscreenOutput);
     }
 
     int modeId = kscreenOutput->currentMode() ? kscreenOutput->currentModeId().toInt() : kscreenOutput->preferredModeId().toInt();
     xOutput->updateLogicalSize(kscreenOutput);
 
     qCDebug(KSCREEN_XRANDR) << "RRSetCrtcConfig (change output)"
                             << "\n"
                             << "\tOutput:" << kscreenOutput->id() << "(" << kscreenOutput->name() << ")"
                             << "\n"
                             << "\tCRTC:" << xOutput->crtc()->crtc() << "\n"
                             << "\tPos:" << kscreenOutput->pos() << "\n"
                             << "\tMode:" << kscreenOutput->currentMode() << "Preferred:" << kscreenOutput->preferredModeId() << "\n"
                             << "\tRotation:" << kscreenOutput->rotation();
 
     if (!sendConfig(kscreenOutput, xOutput->crtc())) {
         return false;
     }
 
     xOutput->update(xOutput->crtc()->crtc(), modeId, XCB_RANDR_CONNECTION_CONNECTED);
     xOutput->setPriority(kscreenOutput->priority());
     return true;
 }
 
 bool XRandRConfig::sendConfig(const KScreen::OutputPtr &kscreenOutput, XRandRCrtc *crtc) const
 {
     xcb_randr_output_t outputs[1]{static_cast<xcb_randr_output_t>(kscreenOutput->id())};
     const int modeId = kscreenOutput->currentMode() ? kscreenOutput->currentModeId().toInt() : kscreenOutput->preferredModeId().toInt();
 
     auto cookie = xcb_randr_set_crtc_config(XCB::connection(),
                                             crtc->crtc(),
                                             XCB_CURRENT_TIME,
                                             XCB_CURRENT_TIME,
                                             kscreenOutput->pos().rx(),
                                             kscreenOutput->pos().ry(),
                                             modeId,
                                             kscreenOutput->rotation(),
                                             1,
                                             outputs);
 
     XCB::ScopedPointer<xcb_randr_set_crtc_config_reply_t> reply(xcb_randr_set_crtc_config_reply(XCB::connection(), cookie, nullptr));
     if (!reply) {
         qCDebug(KSCREEN_XRANDR) << "\tResult: unknown (error)";
         return false;
     }
 
     crtc->updateTimestamp(reply->timestamp);
 
     qCDebug(KSCREEN_XRANDR) << "\tResult: " << reply->status << " timestamp: " << reply->timestamp;
     return (reply->status == XCB_RANDR_SET_CONFIG_SUCCESS);
 }
 
 #include "moc_xrandrconfig.cpp"