enhanced multiple image sorting

improved image memory allocation

src/common/JPGLibrary.cxx

@@ -49,13 +49,13 @@ void JPGLibrary::loadImage(const string& filename, FBSurface& surface,
   in.seekg(0);
 
   // Create space for the entire file
-  if(size > myFileBuffer.size())
-    myFileBuffer.resize(size);
+  if(size > myFileBuffer.capacity())
+    myFileBuffer.reserve(size * 1.5);
   if(!in.read(myFileBuffer.data(), size))
-    loadImageERROR("Image data reading failed");
+    loadImageERROR("JPG image data reading failed");
 
   if(njDecode(myFileBuffer.data(), static_cast<int>(size)))
-    loadImageERROR("Error decoding the input file");
+    loadImageERROR("Error decoding the JPG image");
 
   // Read the entire image in one go
   myReadInfo.buffer = njGetImage();

src/common/PNGLibrary.cxx

@@ -49,18 +49,18 @@ void PNGLibrary::loadImage(const string& filename, FBSurface& surface, VariantLi
 
   std::ifstream in(filename, std::ios_base::binary);
   if(!in.is_open())
-    loadImageERROR("No snapshot found");
+    loadImageERROR("No image found");
 
   // Create the PNG loading context structure
   png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, nullptr,
                  png_user_error, png_user_warn);
   if(png_ptr == nullptr)
-    loadImageERROR("Couldn't allocate memory for PNG file");
+    loadImageERROR("Couldn't allocate memory for PNG image");
 
   // Allocate/initialize the memory for image information.  REQUIRED.
 	info_ptr = png_create_info_struct(png_ptr);
   if(info_ptr == nullptr)
-    loadImageERROR("Couldn't create image information for PNG file");
+    loadImageERROR("Couldn't create image information for PNG image");
 
   // Set up the input control
   png_set_read_fn(png_ptr, &in, png_read_data);
@@ -97,7 +97,7 @@ void PNGLibrary::loadImage(const string& filename, FBSurface& surface, VariantLi
 
   // Create/initialize storage area for the current image
   if(!allocateStorage(iwidth, iheight))
-    loadImageERROR("Not enough memory to read PNG file");
+    loadImageERROR("Not enough memory to read PNG image");
 
   // The PNG read function expects an array of rows, not a single 1-D array
   for(uInt32 irow = 0, offset = 0; irow < ReadInfo.height; ++irow, offset += ReadInfo.pitch)
@@ -385,12 +385,12 @@ bool PNGLibrary::allocateStorage(png_uint_32 w, png_uint_32 h)
 {
   // Create space for the entire image (3 bytes per pixel in RGB format)
   const size_t req_buffer_size = w * h * 3;
-  if(req_buffer_size > ReadInfo.buffer.size())
-    ReadInfo.buffer.resize(req_buffer_size);
+  if(req_buffer_size > ReadInfo.buffer.capacity())
+    ReadInfo.buffer.reserve(req_buffer_size * 1.5);
 
   const size_t req_row_size = h;
-  if(req_row_size > ReadInfo.row_pointers.size())
-    ReadInfo.row_pointers.resize(req_row_size);
+  if(req_row_size > ReadInfo.row_pointers.capacity())
+    ReadInfo.row_pointers.reserve(req_row_size * 1.5);
 
   ReadInfo.width  = w;
   ReadInfo.height = h;

src/gui/RomImageWidget.cxx

@@ -90,6 +90,7 @@ void RomImageWidget::reloadProperties(const FSNode& node)
 void RomImageWidget::parseProperties(const FSNode& node, bool full)
 {
   uInt64 startTime = TimerManager::getTicks() / 1000;
+
   if(myNavSurface == nullptr)
   {
     // Create navigation surface
@@ -154,7 +155,8 @@ void RomImageWidget::parseProperties(const FSNode& node, bool full)
 
     // Try to find all snapshots by property and ROM file name
     myImageList.clear();
-    getImageList(myProperties.get(PropType::Cart_Name), node.getNameWithExt());
+    getImageList(myProperties.get(PropType::Cart_Name), node.getNameWithExt(),
+      oldFileName);
 
     // The first file found before must not be the first file now, if files by
     // property *and* ROM name are found (TODO: fix that!)
@@ -191,13 +193,14 @@ bool RomImageWidget::changeImage(int direction)
 
 #ifdef IMAGE_SUPPORT
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-bool RomImageWidget::getImageList(const string& propName, const string& romName)
+bool RomImageWidget::getImageList(const string& propName, const string& romName,
+                                  const string& oldFileName)
 {
   const std::regex symbols{R"([-[\]{}()*+?.,\^$|#])"}; // \s
   const string rgxPropName = std::regex_replace(propName, symbols, R"(\$&)");
   const string rgxRomName  = std::regex_replace(romName,  symbols, R"(\$&)");
   // Look for <name.png|jpg> or <name_#.png|jpg> (# is a number)
-  const std::regex rgx("^(" + rgxPropName + "|" + rgxRomName + ")(_\\d+){0,1}\\.(png|jpg)$");
+  const std::regex rgx("^(" + rgxPropName + "|" + rgxRomName + ")(_\\d+)?\\.(png|jpg)$");
 
   FSNode::NameFilter filter = ([&](const FSNode& node)
     {
@@ -212,14 +215,17 @@ bool RomImageWidget::getImageList(const string& propName, const string& romName)
   // Sort again, not considering extensions, else <filename.png|jpg> would be at
   // the end of the list
   std::sort(myImageList.begin(), myImageList.end(),
-            [](const FSNode& node1, const FSNode& node2)
+            [oldFileName](const FSNode& node1, const FSNode& node2)
     {
       int compare = BSPF::compareIgnoreCase(node1.getNameWithExt(), node2.getNameWithExt());
       return
         compare < 0 ||
+        // PNGs first!
         (compare == 0 &&
           node1.getName().substr(node1.getName().find_last_of('.') + 1) >
-          node2.getName().substr(node2.getName().find_last_of('.') + 1)); // PNGs first!
+          node2.getName().substr(node2.getName().find_last_of('.') + 1)) ||
+        // Make sure that first image found in initial load is first image now too
+        node1.getName() == oldFileName;
     }
   );
   return myImageList.size() > 0;
@@ -348,7 +354,7 @@ void RomImageWidget::drawWidget(bool hilite)
   FBSurface& s = dialog().surface();
   const int yoff = myImageHeight;
 
-  s.fillRect(_x+1, _y+1, _w-2, _h-2, _bgcolor);
+  s.fillRect(_x, _y + 1, _w, _h - 1, _bgcolor);
   s.frameRect(_x, _y, _w, myImageHeight, kColor);
 
   if(!myHaveProperties)

src/gui/RomImageWidget.hxx

@@ -35,7 +35,8 @@ class RomImageWidget : public Widget
       return font.getFontHeight() * 9 / 8;
     }
 
-    void setProperties(const FSNode& node, const Properties properties, bool full = true);
+    void setProperties(const FSNode& node, const Properties properties,
+                       bool full = true);
     void clearProperties();
     void reloadProperties(const FSNode& node);
     bool changeImage(int direction = 1);
@@ -52,7 +53,8 @@ class RomImageWidget : public Widget
   private:
     void parseProperties(const FSNode& node, bool full = true);
   #ifdef IMAGE_SUPPORT
-    bool getImageList(const string& propName, const string& romName);
+    bool getImageList(const string& propName, const string& romName,
+                      const string& oldFileName);
     bool tryImageFormats(string& fileName);
     bool loadImage(const string& fileName);
     bool loadPng(const string& fileName);