first stab at a group level margin override

pandatool/src/palettizer/paletteGroup.cxx

@@ -119,6 +119,37 @@ get_groups() const {
   return _dependent;
 }
 
+////////////////////////////////////////////////////////////////////
+//     Function: PaletteGroup::get_margin_override
+//       Access: Public
+//  Description: Returns the set of groups this group depends on.
+////////////////////////////////////////////////////////////////////
+int PaletteGroup::
+get_margin_override() const {
+  return _margin_override;
+}
+
+////////////////////////////////////////////////////////////////////
+//     Function: PaletteGroup::get_margin_override
+//       Access: Public
+//  Description: Returns the set of groups this group depends on.
+////////////////////////////////////////////////////////////////////
+void PaletteGroup::
+set_margin_override(const int override) {
+  _margin_override = override;
+  _has_margin_override = true;
+}
+
+////////////////////////////////////////////////////////////////////
+//     Function: PaletteGroup::has_margin_override
+//       Access: Public
+//  Description: Returns the set of groups this group depends on.
+////////////////////////////////////////////////////////////////////
+bool PaletteGroup::
+has_margin_override() const {
+  return _has_margin_override;
+}
+
 ////////////////////////////////////////////////////////////////////
 //     Function: PaletteGroup::get_placements
 //       Access: Public

pandatool/src/palettizer/paletteGroup.h

@@ -65,6 +65,10 @@ public:
   int get_dependency_order() const;
   int get_dirname_order() const;
 
+  void set_margin_override(const int override);
+  int get_margin_override() const;
+  bool has_margin_override() const;
+
   bool is_preferred_over(const PaletteGroup &other) const;
 
   void increment_egg_count();
@@ -116,6 +120,8 @@ private:
   // don't use them otherwise.
   int _num_placements;
   int _num_pages;
+  bool _has_margin_override;
+  int _margin_override;
   pvector<PalettePage *> _load_pages;
 
 public:

pandatool/src/palettizer/texturePlacement.cxx

@@ -939,7 +939,11 @@ compute_size_from_uvs(const TexCoordd &min_uv, const TexCoordd &max_uv) {
   _position._x_size = max(_position._x_size, 4);
   _position._y_size = max(_position._y_size, 4);
 
-  _position._margin = _texture->get_margin();
+  if(get_group()->has_margin_override()) {
+    _position._margin = get_group()->get_margin_override();
+  } else {
+    _position._margin = _texture->get_margin();
+  }
   //cout << "margin: " << _position._margin << endl;
   
   // Normally, we have interior margins, but if the image size is too

pandatool/src/palettizer/texturePlacement.h

@@ -128,6 +128,8 @@ private:
   // don't use it otherwise.
   int _num_references;
 
+  int _margin_override;
+
 public:
   static TypeHandle get_class_type() {
     return _type_handle;

pandatool/src/palettizer/txaFile.cxx

@@ -228,6 +228,7 @@ parse_group_line(const vector_string &words) {
     S_on,
     S_includes,
     S_dir,
+    S_margin,
   };
   State state = S_none;
 
@@ -248,6 +249,9 @@ parse_group_line(const vector_string &words) {
     } else if (word == "dir") {
       state = S_dir;
 
+    } else if (word == "margin") {
+      state = S_margin;
+
     } else {
       switch (state) {
       case S_none:
@@ -275,7 +279,16 @@ parse_group_line(const vector_string &words) {
         group->set_dirname(word);
         state = S_none;
         break;
+
+      case S_margin:
+        int margin_override;
+        if (!string_to_int(word, margin_override)) {
+          group->set_margin_override(margin_override);
+        }
+        state = S_none;
+        break;
       }
+
     }
 
     ++wi;