Qt: Add reload button to postprocessing UI

src/duckstation-qt/postprocessingchainconfigwidget.cpp

@@ -1,6 +1,7 @@
 #include "postprocessingchainconfigwidget.h"
 #include "frontend-common/postprocessing_chain.h"
 #include "postprocessingshaderconfigwidget.h"
+#include "qthostinterface.h"
 #include <QtGui/QCursor>
 #include <QtWidgets/QMenu>
 #include <QtWidgets/QMessageBox>
@@ -21,6 +22,7 @@ void PostProcessingChainConfigWidget::connectUi()
   connect(m_ui.clear, &QPushButton::clicked, this, &PostProcessingChainConfigWidget::onClearButtonClicked);
   connect(m_ui.moveUp, &QPushButton::clicked, this, &PostProcessingChainConfigWidget::onMoveUpButtonClicked);
   connect(m_ui.moveDown, &QPushButton::clicked, this, &PostProcessingChainConfigWidget::onMoveDownButtonClicked);
+  connect(m_ui.reload, &QPushButton::clicked, this, &PostProcessingChainConfigWidget::onReloadButtonClicked);
   connect(m_ui.shaderSettings, &QPushButton::clicked, this,
           &PostProcessingChainConfigWidget::onShaderConfigButtonClicked);
   connect(m_ui.shaders, &QListWidget::itemSelectionChanged, this, &PostProcessingChainConfigWidget::updateButtonStates);
@@ -73,6 +75,7 @@ void PostProcessingChainConfigWidget::updateButtonStates()
   std::optional<u32> index = getSelectedIndex();
   m_ui.remove->setEnabled(index.has_value());
   m_ui.clear->setEnabled(!m_chain.IsEmpty());
+  m_ui.reload->setEnabled(!m_chain.IsEmpty());
   m_ui.shaderSettings->setEnabled(index.has_value() && (index.value() < m_chain.GetStageCount()) &&
                                   m_chain.GetShaderStage(index.value()).HasOptions());
 
@@ -177,3 +180,8 @@ void PostProcessingChainConfigWidget::onShaderConfigButtonClicked()
     shader_config.exec();
   }
 }
+
+void PostProcessingChainConfigWidget::onReloadButtonClicked()
+{
+  QtHostInterface::GetInstance()->reloadPostProcessingShaders();
+}

src/duckstation-qt/postprocessingchainconfigwidget.h

@@ -31,6 +31,7 @@ private Q_SLOTS:
   void onMoveUpButtonClicked();
   void onMoveDownButtonClicked();
   void onShaderConfigButtonClicked();
+  void onReloadButtonClicked();
   void updateButtonStates();
 
 private:

src/duckstation-qt/postprocessingchainconfigwidget.ui

@@ -82,6 +82,17 @@
        </property>
       </widget>
      </item>
+     <item>
+      <widget class="QToolButton" name="reload">
+       <property name="text">
+        <string>&amp;Reload Shaders</string>
+       </property>
+       <property name="icon">
+        <iconset resource="resources/icons.qrc">
+         <normaloff>:/icons/view-refresh.png</normaloff>:/icons/view-refresh.png</iconset>
+       </property>
+      </widget>
+     </item>
      <item>
       <spacer name="horizontalSpacer">
        <property name="orientation">

src/duckstation-qt/qthostinterface.cpp

@@ -1024,7 +1024,7 @@ void QtHostInterface::setCheatEnabled(quint32 index, bool enabled)
   SetCheatCodeState(index, enabled, g_settings.auto_load_cheats);
 }
 
-void QtHostInterface::applyCheat(u32 index)
+void QtHostInterface::applyCheat(quint32 index)
 {
   if (!isOnWorkerThread())
   {
@@ -1035,6 +1035,17 @@ void QtHostInterface::applyCheat(u32 index)
   ApplyCheatCode(index);
 }
 
+void QtHostInterface::reloadPostProcessingShaders()
+{
+  if (!isOnWorkerThread())
+  {
+    QMetaObject::invokeMethod(this, "reloadPostProcessingShaders", Qt::QueuedConnection);
+    return;
+  }
+
+  ReloadPostProcessingShaders();
+}
+
 void QtHostInterface::loadState(const QString& filename)
 {
   if (!isOnWorkerThread())

src/duckstation-qt/qthostinterface.h

@@ -40,6 +40,8 @@ public:
   explicit QtHostInterface(QObject* parent = nullptr);
   ~QtHostInterface();
 
+  ALWAYS_INLINE static QtHostInterface* GetInstance() { return static_cast<QtHostInterface*>(g_host_interface); }
+
   const char* GetFrontendName() const override;
 
   bool Initialize() override;
@@ -164,6 +166,7 @@ public Q_SLOTS:
   void loadCheatList(const QString& filename);
   void setCheatEnabled(quint32 index, bool enabled);
   void applyCheat(quint32 index);
+  void reloadPostProcessingShaders();
 
 private Q_SLOTS:
   void doStopThread();