Qt: Add screenshot button

src/duckstation-qt/mainwindow.cpp

@@ -378,6 +378,7 @@ void MainWindow::updateEmulationActions(bool starting, bool running)
   m_ui.actionReset->setDisabled(starting || !running);
   m_ui.actionPause->setDisabled(starting || !running);
   m_ui.actionChangeDisc->setDisabled(starting || !running);
+  m_ui.actionScreenshot->setDisabled(starting || !running);
   m_ui.menuChangeDisc->setDisabled(starting || !running);
 
   m_ui.actionSaveState->setDisabled(starting || !running);
@@ -434,6 +435,7 @@ void MainWindow::connectSignals()
   connect(m_ui.actionPowerOff, &QAction::triggered, m_host_interface, &QtHostInterface::powerOffSystem);
   connect(m_ui.actionReset, &QAction::triggered, m_host_interface, &QtHostInterface::resetSystem);
   connect(m_ui.actionPause, &QAction::toggled, m_host_interface, &QtHostInterface::pauseSystem);
+  connect(m_ui.actionScreenshot, &QAction::triggered, m_host_interface, &QtHostInterface::saveScreenshot);
   connect(m_ui.actionLoadState, &QAction::triggered, this, [this]() { m_ui.menuLoadState->exec(QCursor::pos()); });
   connect(m_ui.actionSaveState, &QAction::triggered, this, [this]() { m_ui.menuSaveState->exec(QCursor::pos()); });
   connect(m_ui.actionExit, &QAction::triggered, this, &MainWindow::close);

src/duckstation-qt/mainwindow.ui

@@ -163,6 +163,7 @@
    <addaction name="actionReset"/>
    <addaction name="actionPause"/>
    <addaction name="actionChangeDisc"/>
+   <addaction name="actionScreenshot"/>
    <addaction name="separator"/>
    <addaction name="actionLoadState"/>
    <addaction name="actionSaveState"/>
@@ -444,6 +445,15 @@
     <string>Show MDEC State</string>
    </property>
   </action>
+  <action name="actionScreenshot">
+   <property name="icon">
+    <iconset resource="resources/icons.qrc">
+     <normaloff>:/icons/video-display.png</normaloff>:/icons/video-display.png</iconset>
+   </property>
+   <property name="text">
+    <string>&amp;Screenshot</string>
+   </property>
+  </action>
  </widget>
  <resources>
   <include location="resources/icons.qrc"/>

src/duckstation-qt/qthostinterface.cpp

@@ -588,6 +588,17 @@ void QtHostInterface::stopDumpingAudio()
   StopDumpingAudio();
 }
 
+void QtHostInterface::saveScreenshot()
+{
+  if (!isOnWorkerThread())
+  {
+    QMetaObject::invokeMethod(this, "saveScreenshot");
+    return;
+  }
+
+  SaveScreenshot(nullptr, true, true);
+}
+
 void QtHostInterface::enableBackgroundControllerPolling()
 {
   if (!isOnWorkerThread())

src/duckstation-qt/qthostinterface.h

@@ -97,6 +97,7 @@ public Q_SLOTS:
   void saveState(bool global, qint32 slot, bool block_until_done = false);
   void startDumpingAudio();
   void stopDumpingAudio();
+  void saveScreenshot();
 
   /// Enables controller polling even without a system active. Must be matched by a call to
   /// disableBackgroundControllerPolling.