A slight improvement to avoid rendering boxes behind text that is default bg color.

scratchpad/img2ansi.cpp

@@ -21,7 +21,9 @@ int main(int argc, char *argv[]) {
   image.loadFromFile(image_file);
 
   // create a grid panel to hold the cells
+  Panel panel(40,40, 0, 0, true);
   // divide the image into cells
+
   // for each cell:
   //    get the color
   //    calculate value