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#include "loginrpc.h"
#include "cvt.h"
#include <QtNetwork/QTcpServer>
#include <QtNetwork/QTcpSocket>
#include <QDebug>
#include <QSize>
#include <QProcess>
#include <QRegularExpression>
static int setMode(const QString &virtOut, const QString &name, const QStringList &allOutputs);
static int sizeDiff(const QSize &a, const QSize &b)
{
return qAbs((a.width() * a.width()) - (b.width() * b.width()))
+ qAbs((a.height() * a.height()) - (b.height() * b.height()));
}
LoginRpc::LoginRpc(int port, QObject *parent)
: QObject(parent)
{
QTcpServer *srv = new QTcpServer(this);
srv->listen(QHostAddress::Any, port);
connect(srv, &QTcpServer::newConnection, [=] {
while (srv->hasPendingConnections()) {
QTcpSocket *sock = srv->nextPendingConnection();
handleIncoming(sock);
}
});
}
void LoginRpc::handleIncoming(QTcpSocket *sock) {
connect(sock, &QTcpSocket::readyRead, [=] {
QByteArray ba = sock->readAll(); // XXX We assume everything arrives in one packet
if (ba.length() < 2) {
sock->deleteLater();
return;
}
int vers = (ba[0] << 8) + ba[1];
ba = ba.mid(2);
ba = QByteArray::fromBase64(ba);
if (vers == 1) {
handleCommandV1(QString::fromUtf8(ba));
} else {
qDebug() << "Ignoring unknown Login RPC version" << vers;
}
});
}
void LoginRpc::handleCommandV1(const QString &command)
{
QStringList lines = command.split('\n');
while (lines.count() < 3) {
lines.append(QString());
}
QString res = lines[2];
QStringList parts = res.split("x");
qDebug() << "Got resolution" << res << "parsed to" << parts;
if (parts.size() == 2) {
struct {
QString output;
QString modeName;
QSize size;
} bestConMode, bestDisconMode, *currentReadMode = nullptr;
int x = parts[0].toInt();
int y = parts[1].toInt();
qDebug() << "As int:" << x << y;
if (x > 0 && y > 0) {
x = (x / 8) * 8;
y = (y / 8) * 8;
// TODO: Configurable min max sizes
if (x < 1024) x = 1024;
if (y < 720) y = 720;
if (x > 1920) x = 1920;
if (y > 1080) y = 1080;
QString name = QString("%1x%2_60").arg(x).arg(y);
mode *mode = vert_refresh(x, y, 60, 0, 0, 0);
QProcess p;
// Fetch xrandr default output once
p.setProcessChannelMode(QProcess::MergedChannels);
p.start("xrandr", QStringList());
p.waitForFinished(2000);
p.kill();
QString xrandrOutput = QString::fromLocal8Bit(p.readAll());
qDebug() << "Creating new mode via xrandr";
p.setProcessChannelMode(QProcess::ForwardedChannels);
QStringList newmode = QStringList() << "--verbose" << "--newmode" << name << QString::asprintf("%.2f", mode->pclk)
<< QString::number(mode->hr) << QString::number(mode->hss) << QString::number(mode->hse) << QString::number(mode->hfl)
<< QString::number(mode->vr) << QString::number(mode->vss) << QString::number(mode->vse) << QString::number(mode->vfl)
<< "-hsync" << "+vsync";
// Create mode
p.start("xrandr", newmode);
p.waitForFinished(2000);
qDebug() << "Exit code" << p.exitCode();
bool lowResFallback = p.exitCode() != 0;
p.kill();
do {
// Find best match among existing modes in case --newmode failed, or --addmode fails later
QSize wantedSize(x, y);
QStringList lines = xrandrOutput.split(QRegularExpression("[\r\n]+"));
QString curScreen;
bool curConnected = false;
QRegularExpression scr("^([A-Za-z0-9_-]+)\\s+(connected|disconnected)\\s+");
QRegularExpression mode("^\\s+([0-9]+)x([0-9]+)(\\S*)\\s+\\d");
for (const auto &line : lines) {
//qDebug() << "Line" << line;
auto m = scr.match(line);
if (m.hasMatch()) {
// Is a line that starts a new screen section
curScreen = m.captured(1);
curConnected = m.captured(2) == QStringLiteral("connected");
currentReadMode = curConnected ? &bestConMode : &bestDisconMode;
//qDebug() << "Output" << curScreen << curConnected;
continue;
}
if (currentReadMode != nullptr) {
m = mode.match(line);
if (m.hasMatch()) {
// Is a resolution/mode
QSize s(m.captured(1).toInt(), m.captured(2).toInt());
//qDebug() << "Matched resolution" << m.captured() << s;
//qDebug() << "Current:" << sizeDiff(currentReadMode->size, wantedSize) << ", This: " << sizeDiff(s, wantedSize);
if (s.width() > 1000 && s.height() > 700 && sizeDiff(currentReadMode->size, wantedSize) > sizeDiff(s, wantedSize)) {
// Better
qDebug() << s << "is better than" << currentReadMode->size << "on" << curScreen << curConnected;
currentReadMode->output = curScreen;
currentReadMode->modeName = m.captured(1) + "x" + m.captured(2) + m.captured(3);
currentReadMode->size = s;
}
}
}
}
} while(0);
// Get all outputs
QRegularExpression re("^(\\S+)\\s.*?(\\w*connected)", QRegularExpression::MultilineOption);
QRegularExpressionMatchIterator it = re.globalMatch(xrandrOutput);
QString virtOut, evdiOut;
QStringList allOutputs, disconnectedOutputs, connectedOutputs;
while (it.hasNext()) {
QRegularExpressionMatch m = it.next();
QString output = m.captured(1);
if (virtOut.isEmpty() && (output == QLatin1String("VIRTUAL1") || output == QLatin1String("VIRTUAL-1")
|| output == QLatin1String("Virtual1") || output == QLatin1String("Virtual-1")
|| output == QLatin1String("default"))) {
virtOut = output;
} else if (output == QLatin1String("DVI-I-1-1")) {
evdiOut = output;
} else {
allOutputs << output;
}
if (m.captured(2) == QStringLiteral("disconnected")) {
disconnectedOutputs << output;
} else {
connectedOutputs << output;
}
}
if (virtOut.isEmpty()) {
virtOut = evdiOut;
} else if (!evdiOut.isEmpty()) {
allOutputs << evdiOut;
}
qDebug() << "Virtual output:" << virtOut << "unwanted additional outputs:" << allOutputs;
int ret = -1;
// Always try virtual output first, even if --newmode failed. Might have to be re-evaluated in the future
if (!virtOut.isEmpty()) {
// Add to virtual output
p.start("xrandr", QStringList() << "--verbose" << "--addmode" << virtOut << name);
p.waitForFinished(2000);
p.kill();
ret = setMode(virtOut, name, allOutputs);
if (ret != 0) {
allOutputs << virtOut;
}
}
// Overridden, because --newmode failed?
if (lowResFallback) {
if (ret != 0 && !bestDisconMode.modeName.isEmpty()) {
qDebug() << "Ret" << ret << "- Trying to enable best disconnected screen (1)";
ret = setMode(bestDisconMode.output, bestDisconMode.modeName, allOutputs);
bestDisconMode.modeName.clear();
}
if (ret != 0 && !bestConMode.modeName.isEmpty()) {
qDebug() << "Ret" << ret << "- Trying to enable best connected screen (1)";
ret = setMode(bestConMode.output, bestConMode.modeName, allOutputs);
bestConMode.modeName.clear();
}
}
// Either -1 if we didn't have a virtual one, or != 0 if xrandr setting failed
// Now as fallback, try enabling a disconnected output only
if (ret != 0 && !disconnectedOutputs.isEmpty()) {
qDebug() << "Ret:" << ret << "- Trying to enable one random disconnected output";
QRegularExpression re("\\d+$");
QString dis;
int used[10] = {};
for (QString c : connectedOutputs) {
auto m = re.match(c);
if (m.hasMatch()) {
int i = m.captured().toInt();
if (i >= 0 && i < 10) {
used[i]++;
}
}
}
for (QString c : disconnectedOutputs) {
auto m = re.match(c);
if (m.hasMatch()) {
int i = m.captured().toInt();
if (i >= 0 && i < 10 && used[i] == 0) {
dis = c;
break;
}
}
}
if (dis.isEmpty()) {
dis = disconnectedOutputs.first();
}
// Add to output
p.start("xrandr", QStringList() << "--verbose" << "--addmode" << dis << name);
p.waitForFinished(2000);
p.kill();
ret = setMode(dis, name, allOutputs);
}
// Try this stuff again in case --newmode succeeded but --addmode now didn't (NVIDIA)
if (ret != 0 && !bestDisconMode.modeName.isEmpty()) {
qDebug() << "Ret" << ret << "- Trying to enable best disconnected screen (2)";
ret = setMode(bestDisconMode.output, bestDisconMode.modeName, allOutputs);
bestDisconMode.modeName.clear();
}
// Now as fallback, try enabling just one connected output
if (ret != 0 && !connectedOutputs.isEmpty()) {
qDebug() << "Ret:" << ret << "- Trying to enable one random connected output";
QString conn = connectedOutputs.first();
// Add to output
p.start("xrandr", QStringList() << "--verbose" << "--addmode" << conn << name);
p.waitForFinished(2000);
p.kill();
ret = setMode(conn, name, allOutputs);
}
// Try this stuff again in case --newmode succeeded but --addmode now didn't (NVIDIA)
if (ret != 0 && !bestConMode.modeName.isEmpty()) {
qDebug() << "Ret" << ret << "- Trying to enable best connected screen (2)";
ret = setMode(bestConMode.output, bestConMode.modeName, allOutputs);
bestConMode.modeName.clear();
}
}
}
emit loginRequest(lines[0], lines[1], lines[2]);
}
static int setMode(const QString &virtOut, const QString &name, const QStringList &allOutputs)
{
QStringList setMode(QStringLiteral("--verbose"));
QProcess p;
p.setProcessChannelMode(QProcess::ForwardedChannels);
for (auto output : allOutputs) {
if (output == virtOut)
continue; // Skip self
setMode << "--output" << output << "--off";
}
setMode << "--output" << virtOut << "--mode" << name;
// Set all outputs
qDebug() << setMode;
p.start("xrandr", setMode);
p.waitForFinished(2000);
int ret = p.exitCode();
p.kill();
return ret;
}
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