Fix final issue with snapshots not loading in RomInfoWidget.

src/common/FBBackendSDL2.cxx

@@ -71,8 +71,6 @@ FBBackendSDL2::~FBBackendSDL2()
     myWindow = nullptr;
   }
   SDL_QuitSubSystem(SDL_INIT_VIDEO | SDL_INIT_TIMER);
-
-cerr << "~FBBackendSDL2()" << endl;
 }
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

src/common/FBSurfaceSDL2.cxx

@@ -40,8 +40,6 @@ namespace {
   }
 }
 
-static int REF_COUNT = 0;
-
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 FBSurfaceSDL2::FBSurfaceSDL2(FBBackendSDL2& backend,
                              uInt32 width, uInt32 height,
@@ -50,7 +48,6 @@ FBSurfaceSDL2::FBSurfaceSDL2(FBBackendSDL2& backend,
   : myBackend{backend},
     myInterpolationMode{inter}
 {
-REF_COUNT++;
   createSurface(width, height, staticData);
 }
 
@@ -61,8 +58,6 @@ FBSurfaceSDL2::~FBSurfaceSDL2()
 
   if(mySurface)
   {
-REF_COUNT--;
-cerr << "  ~FBSurfaceSDL2(): " << this << "  " << REF_COUNT << endl;
     SDL_FreeSurface(mySurface);
     mySurface = nullptr;
   }

src/emucore/FrameBuffer.cxx

@@ -67,7 +67,6 @@ FrameBuffer::FrameBuffer(OSystem& osystem)
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 FrameBuffer::~FrameBuffer()
 {
-cerr << "~FrameBuffer()" << endl << endl;
 }
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

src/gui/Dialog.cxx

@@ -50,7 +50,8 @@ Dialog::Dialog(OSystem& instance, DialogContainer& parent, const GUI::Font& font
                const string& title, int x, int y, int w, int h)
   : GuiObject(instance, parent, *this, x, y, w, h),
     _font{font},
-    _title{title}
+    _title{title},
+    _renderCallback{[]() { return; }}
 {
   _flags = Widget::FLAG_ENABLED | Widget::FLAG_BORDER | Widget::FLAG_CLEARBG;
   setTitle(title);
@@ -75,8 +76,6 @@ Dialog::~Dialog()
   _firstWidget = nullptr;
 
   _buttonGroup.clear();
-
-cerr << "\n~Dialog(): " << this << endl;
 }
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
@@ -163,6 +162,12 @@ void Dialog::setDirtyChain()
   _dirtyChain = true;
 }
 
+// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+void Dialog::resetSurfaces()
+{
+  _surface->reload();
+}
+
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 void Dialog::tick()
 {
@@ -241,11 +246,7 @@ void Dialog::render()
   // Update dialog surface; also render any extra surfaces
   // Extra surfaces must be rendered afterwards, so they are drawn on top
   if(_surface->render())
-  {
-    mySurfaceStack.applyAll([](unique_ptr<FBSurface>& surface) {
-      surface->render();
-    });
-  }
+    _renderCallback();
 
   // A dialog is still on top if a non-shading dialog (e.g. ContextMenu)
   // is opended above it.
@@ -422,10 +423,9 @@ void Dialog::buildCurrentFocusList(int tabID)
 }
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-void Dialog::addSurface(const unique_ptr<FBSurface>& surface)
+void Dialog::addRenderCallback(const std::function<void()>& callback)
 {
-// FIXME : add this to the stack somehow
-//  mySurfaceStack.push(surface);
+  _renderCallback = callback;
 }
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

src/gui/Dialog.hxx

@@ -28,7 +28,6 @@ class TabWidget;
 class CommandSender;
 class ToolTip;
 
-#include "Stack.hxx"
 #include "Widget.hxx"
 #include "GuiObject.hxx"
 #include "StellaKeys.hxx"
@@ -45,6 +44,8 @@ class Dialog : public GuiObject
   friend class DialogContainer;
 
   public:
+    using RenderCallback = std::function<void()>;
+
     Dialog(OSystem& instance, DialogContainer& parent,
            int x = 0, int y = 0, int w = 0, int h = 0);
     Dialog(OSystem& instance, DialogContainer& parent, const GUI::Font& font,
@@ -62,6 +63,8 @@ class Dialog : public GuiObject
     virtual void saveConfig()  { }
     virtual void setDefaults() { }
 
+    virtual void resetSurfaces();
+
     void setDirty() override;
     void setDirtyChain() override;
     void redraw(bool force = false);
@@ -85,12 +88,11 @@ class Dialog : public GuiObject
     FBSurface& surface() const { return *_surface; }
 
     /**
-      Adds a surface to this dialog, which is rendered on top of the
-      base surface whenever the base surface is re-rendered.  Since
-      the surface render() call will always occur in such a case, the
-      surface should call setVisible() to enable/disable its output.
+      This method is called each time the main Dialog::render is called.
+      It is called *after* the dialog has been rendered, so it can be
+      used to render another surface on top of it, among other things.
     */
-    void addSurface(const unique_ptr<FBSurface>& surface);
+    void addRenderCallback(const RenderCallback& callback);
 
     void setTitle(const string& title);
     bool hasTitle() { return !_title.empty(); }
@@ -253,7 +255,7 @@ class Dialog : public GuiObject
     uInt32 _max_w{0}; // maximum wanted width
     uInt32 _max_h{0}; // maximum wanted height
 
-    Common::FixedStack<unique_ptr<FBSurface>> mySurfaceStack;
+    RenderCallback _renderCallback;
 
   private:
     // Following constructors and assignment operators not supported

src/gui/DialogContainer.cxx

@@ -203,7 +203,7 @@ void DialogContainer::reStack()
 void DialogContainer::resetSurfaces()
 {
   myDialogStack.applyAll([&](Dialog*& d) {
-    d->surface().reload();
+    d->resetSurfaces();
   });
 }
 

src/gui/LauncherDialog.cxx

@@ -350,6 +350,15 @@ void LauncherDialog::reload()
   myPendingReload = false;
 }
 
+// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+void LauncherDialog::resetSurfaces()
+{
+  if(myRomInfoWidget)
+    myRomInfoWidget->resetSurfaces();
+
+  Dialog::resetSurfaces();
+}
+
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 void LauncherDialog::tick()
 {

src/gui/LauncherDialog.hxx

@@ -108,6 +108,7 @@ class LauncherDialog : public Dialog
 
     void loadConfig() override;
     void saveConfig() override;
+    void resetSurfaces() override;
     void updateUI();
 
     /**

src/gui/RomInfoWidget.cxx

@@ -94,7 +94,11 @@ void RomInfoWidget::parseProperties(const FilesystemNode& node)
         myAvail.w, myAvail.h, ScalingInterpolation::blur);
     mySurface->applyAttributes();
 
-    dialog().addSurface(mySurface);
+    dialog().addRenderCallback([this]() {
+      if(mySurfaceIsValid)
+        mySurface->render();
+      }
+    );
   }
 
   // Initialize to empty properties entry
@@ -169,6 +173,13 @@ void RomInfoWidget::parseProperties(const FilesystemNode& node)
   setDirty();
 }
 
+// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+void RomInfoWidget::resetSurfaces()
+{
+  if(mySurface)
+    mySurface->reload();
+}
+
 #ifdef PNG_SUPPORT
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 bool RomInfoWidget::loadPng(const string& filename)

src/gui/RomInfoWidget.hxx

@@ -39,6 +39,8 @@ class RomInfoWidget : public Widget
     void clearProperties();
     void reloadProperties(const FilesystemNode& node);
 
+    void resetSurfaces();
+
   protected:
     void drawWidget(bool hilite) override;