--- a/QTfrontend/game.cpp	Sun Dec 30 03:00:51 2012 +0100
+++ b/QTfrontend/game.cpp	Mon Dec 31 12:12:23 2012 +0200
@@ -23,6 +23,8 @@
 #include <QStringListModel>
 #include <QTextStream>
 
+#include "hwform.h"
+#include "ui/page/pageoptions.h"
 #include "game.h"
 #include "hwconsts.h"
 #include "gameuiconfig.h"
@@ -297,6 +299,16 @@
                 writeCampaignVar(msg.right(msg.size() - 3));
             break;
         }
+        case 'W':
+        {
+            // fetch new window resolution via IPC and save it in the settings
+            int size = msg.size();
+            QString newResolution = QString().append(msg.mid(2)).left(size - 4);
+            QStringList wh = newResolution.split('x');
+            config->Form->ui.pageOptions->windowWidthEdit->setText(wh[0]);
+            config->Form->ui.pageOptions->windowHeightEdit->setText(wh[1]);
+            break;
+        }
         default:
         {
             if (gameType == gtNet && !netSuspend)

--- a/QTfrontend/gameuiconfig.cpp	Sun Dec 30 03:00:51 2012 +0100
+++ b/QTfrontend/gameuiconfig.cpp	Mon Dec 31 12:12:23 2012 +0200
@@ -34,6 +34,7 @@
 #include "fpsedit.h"
 #include "HWApplication.h"
 #include "DataManager.h"
+#include "SDL.h"
 
 
 const QNetworkProxy::ProxyType proxyTypesMap[] = {
@@ -81,6 +82,20 @@
             Form->ui.pageOptions->CBResolution->setCurrentIndex(0);
     }
     else Form->ui.pageOptions->CBResolution->setCurrentIndex(t);
+    
+    // Default the windowed resolution to 2/3 of the screen size
+    int screenWidth = SDL_GetVideoInfo()->current_w * 2 / 3; 
+    int screenHeight = SDL_GetVideoInfo()->current_h * 2 / 3; 
+    QString widthStr; widthStr.setNum(screenWidth);
+    QString heightStr; heightStr.setNum(screenHeight);
+    QString wWidth = value("video/windowedWidth", widthStr).toString();
+    QString wHeight = value("video/windowedHeight", heightStr).toString();
+    // If left blank reset the resolution to the default
+    wWidth = (wWidth == "" ? widthStr : wWidth);
+    wHeight = (wHeight == "" ? heightStr : wHeight);
+    Form->ui.pageOptions->windowWidthEdit->setText(wWidth);
+    Form->ui.pageOptions->windowHeightEdit->setText(wHeight);
+    
     Form->ui.pageOptions->CBResolution->setCurrentIndex((t < 0) ? 1 : t);
     Form->ui.pageOptions->CBFullscreen->setChecked(value("video/fullscreen", false).toBool());
     bool ffscr=value("frontend/fullscreen", false).toBool();
@@ -216,6 +231,8 @@
 void GameUIConfig::SaveOptions()
 {
     setValue("video/resolution", Form->ui.pageOptions->CBResolution->currentText());
+    setValue("video/windowedWidth", Form->ui.pageOptions->windowWidthEdit->text());
+    setValue("video/windowedHeight", Form->ui.pageOptions->windowHeightEdit->text());
     setValue("video/fullscreen", vid_Fullscreen());
 
     setValue("video/quality", Form->ui.pageOptions->SLQuality->value());
@@ -338,11 +355,17 @@
 QRect GameUIConfig::vid_Resolution()
 {
     QRect result(0, 0, 640, 480);
-    QStringList wh = Form->ui.pageOptions->CBResolution->currentText().split('x');
-    if (wh.size() == 2)
-    {
-        result.setWidth(wh[0].toInt());
-        result.setHeight(wh[1].toInt());
+    if(Form->ui.pageOptions->CBFullscreen->isChecked()) {
+        QStringList wh = Form->ui.pageOptions->CBResolution->currentText().split('x');
+        if (wh.size() == 2)
+        {
+            result.setWidth(wh[0].toInt());
+            result.setHeight(wh[1].toInt());
+        }
+    }
+    else {
+        result.setWidth(Form->ui.pageOptions->windowWidthEdit->text().toInt());
+        result.setHeight(Form->ui.pageOptions->windowHeightEdit->text().toInt());
     }
     return result;
 }

--- a/QTfrontend/ui/page/pageoptions.cpp	Sun Dec 30 03:00:51 2012 +0100
+++ b/QTfrontend/ui/page/pageoptions.cpp	Mon Dec 31 12:12:23 2012 +0200
@@ -271,7 +271,9 @@
 
             QVBoxLayout * GBAlayout = new QVBoxLayout(AGGroupBox);
             QGridLayout * GBAfrontendlayout = new QGridLayout(0);
-            QHBoxLayout * GBAreslayout = new QHBoxLayout(0);
+            QGridLayout * GBAreslayout = new QGridLayout(0);
+            QHBoxLayout * GBAfullreslayout = new QHBoxLayout(0);
+            QHBoxLayout * GBAwindowedreslayout = new QHBoxLayout(0);
             QHBoxLayout * GBAstereolayout = new QHBoxLayout(0);
             QHBoxLayout * GBAqualayout = new QHBoxLayout(0);
 
@@ -306,16 +308,36 @@
 
             QLabel * resolution = new QLabel(AGGroupBox);
             resolution->setText(QLabel::tr("Resolution"));
-            GBAreslayout->addWidget(resolution);
+            GBAreslayout->addWidget(resolution, 0, 0);
 
             CBResolution = new QComboBox(AGGroupBox);
-            GBAreslayout->addWidget(CBResolution);
-            GBAlayout->addLayout(GBAreslayout);
+            GBAfullreslayout->addWidget(CBResolution);
 
             CBFullscreen = new QCheckBox(AGGroupBox);
             CBFullscreen->setText(QCheckBox::tr("Fullscreen"));
-            GBAreslayout->addWidget(CBFullscreen);
-
+            GBAfullreslayout->addWidget(CBFullscreen);
+            GBAreslayout->addLayout(GBAfullreslayout, 0, 1);
+            
+            QLabel * windowedResolution = new QLabel(AGGroupBox);
+            windowedResolution->setText(QLabel::tr("Windowed Resolution"));
+            GBAreslayout->addWidget(windowedResolution, 1, 0);
+            
+            // decorational X
+            QLabel *winLabelX = new QLabel(AGGroupBox);
+            winLabelX->setText("X");
+            
+            windowWidthEdit = new QLineEdit(AGGroupBox);
+            windowWidthEdit->setValidator(new QIntValidator(this));
+            windowHeightEdit = new QLineEdit(AGGroupBox);
+            windowHeightEdit->setValidator(new QIntValidator(this));
+            
+            GBAwindowedreslayout->addWidget(windowWidthEdit);
+            GBAwindowedreslayout->addWidget(winLabelX);
+            GBAwindowedreslayout->addWidget(windowHeightEdit);
+            GBAreslayout->addLayout(GBAwindowedreslayout, 1, 1);
+            
+            GBAlayout->addLayout(GBAreslayout);
+            
             QLabel * quality = new QLabel(AGGroupBox);
             quality->setText(QLabel::tr("Quality"));
             quality->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);
@@ -638,6 +660,10 @@
     previousQuality = this->SLQuality->value();
     previousResolutionIndex = this->CBResolution->currentIndex();
     previousFullscreenValue = this->CBFullscreen->isChecked();
+    // mutually exclude window and fullscreen resolution
+    CBResolution->setEnabled(this->CBFullscreen->isChecked());
+    windowHeightEdit->setEnabled(!this->CBFullscreen->isChecked());
+    windowWidthEdit->setEnabled(!this->CBFullscreen->isChecked());
 
     return pageLayout;
 }
@@ -672,7 +698,10 @@
 void PageOptions::forceFullscreen(int index)
 {
     bool forced = (index == 7 || index == 8 || index == 9);
-
+    CBResolution->setEnabled(this->CBFullscreen->isChecked());
+    windowHeightEdit->setEnabled(!this->CBFullscreen->isChecked());
+    windowWidthEdit->setEnabled(!this->CBFullscreen->isChecked());
+    
     if (index != 0)
     {
         this->SLQuality->setValue(this->SLQuality->maximum());
@@ -703,7 +732,10 @@
 void PageOptions::setFullscreen(int state)
 {
     Q_UNUSED(state);
-
+    CBResolution->setEnabled(this->CBFullscreen->isChecked());
+    windowHeightEdit->setEnabled(!this->CBFullscreen->isChecked());
+    windowWidthEdit->setEnabled(!this->CBFullscreen->isChecked());
+    
     int index = this->CBStereoMode->currentIndex();
     if (index != 7 && index != 8 && index != 9)
         previousFullscreenValue = this->CBFullscreen->isChecked();

--- a/QTfrontend/ui/page/pageoptions.h	Sun Dec 30 03:00:51 2012 +0100
+++ b/QTfrontend/ui/page/pageoptions.h	Mon Dec 31 12:12:23 2012 +0200
@@ -58,6 +58,8 @@
         QComboBox *CBTeamName;
         IconedGroupBox *AGGroupBox;
         QComboBox *CBResolution;
+        QLineEdit *windowWidthEdit;
+        QLineEdit *windowHeightEdit;
         QComboBox *CBStereoMode;
         QCheckBox *CBFrontendSound;
         QCheckBox *CBFrontendMusic;

--- a/hedgewars/hwengine.pas	Sun Dec 30 03:00:51 2012 +0100
+++ b/hedgewars/hwengine.pas	Mon Dec 31 12:12:23 2012 +0200
@@ -279,6 +279,7 @@
             ScriptOnScreenResize();
             InitCameraBorders();
             InitTouchInterface();
+            SendIPC('W' + IntToStr(cScreenWidth) + 'x' + IntToStr(cScreenHeight));
         end;
 
         CurrTime:= SDL_GetTicks();