a few minor changes

src/common/PNGLibrary.cxx

@@ -34,7 +34,7 @@ PNGLibrary::PNGLibrary(OSystem& osystem)
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 void PNGLibrary::loadImage(const string& filename, FBSurface& surface,
-                           double* aspectRatio, VariantList& metaData)
+                           VariantList& metaData)
 {
   png_structp png_ptr{nullptr};
   png_infop info_ptr{nullptr};
@@ -123,8 +123,6 @@ void PNGLibrary::loadImage(const string& filename, FBSurface& surface,
   // Load image into the surface, setting the correct dimensions
   loadImagetoSurface(surface, hasAlpha);
 
-  *aspectRatio = static_cast<double>(ReadInfo.width) / ReadInfo.height;
-
   // Cleanup
   if(png_ptr)
     png_destroy_read_struct(&png_ptr, info_ptr ? &info_ptr : nullptr, nullptr);

src/common/PNGLibrary.hxx

@@ -50,7 +50,7 @@ class PNGLibrary
              error message.
     */
     void loadImage(const string& filename, FBSurface& surface,
-                   double* aspectRatio, VariantList& metaData);
+                   VariantList& metaData);
 
     /**
       Save the current FrameBuffer image to a PNG file.  Note that in most

src/emucore/Bezel.cxx

@@ -80,7 +80,7 @@ uInt32 Bezel::borderSize(uInt32 x, uInt32 y, uInt32 size, Int32 step) const
     if(a < 255)
       return i;
   }
-  return size;
+  return size - 1;
 }
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
@@ -99,8 +99,6 @@ bool Bezel::load()
 
   if(isShown)
   {
-    double aspectRatio = 1;
-
     mySurface = myFB.allocateSurface(1, 1); // dummy size
     try
     {
@@ -114,17 +112,17 @@ bool Bezel::load()
         const string& name = getName(index);
         if(name != EmptyString)
         {
+          // Note: JPG does not support transparency
           imageName = path + name + ".png";
           FSNode node(imageName);
           if(node.exists())
           {
             isValid = true;
+            myOSystem.png().loadImage(imageName, *mySurface, metaData);
             break;
           }
         }
       } while(index != -1);
-      if(isValid)
-        myOSystem.png().loadImage(imageName, *mySurface, &aspectRatio, metaData);
     }
     catch(const runtime_error&)
     {
@@ -154,9 +152,15 @@ bool Bezel::load()
       top = std::min(h, settings.getInt("bezel.topborder"));
       bottom = h - 1 - std::min(h, settings.getInt("bezel.bottomborder"));
     }
-    //cerr << right - left + 1 << " x " << bottom - top + 1 << " = "
+
-    //  << double(right - left + 1) / double(bottom - top + 1);
+    cerr << (int)(right - left + 1) << " x " << (int)(bottom - top + 1) << " = "
-    myInfo = Info(Common::Size(w, h), Common::Rect(left, top, right, bottom));
+      << double((int)(right - left + 1)) / double((int)(bottom - top + 1));
+
+    // Disable bezel is no transparent window was found
+    if (left < right && top < bottom)
+      myInfo = Info(Common::Size(w, h), Common::Rect(left, top, right, bottom));
+    else
+      myInfo = Info();
   }
   else
     myInfo = Info();

src/gui/RomImageWidget.cxx

@@ -290,8 +290,7 @@ bool RomImageWidget::loadPng(const string& fileName)
   try
   {
     VariantList metaData;
-    double aspectRatio = 1;
+    instance().png().loadImage(fileName, *mySurface, metaData);
-    instance().png().loadImage(fileName, *mySurface, &aspectRatio, metaData);
 
     // Retrieve label for loaded image
     myLabel.clear();