Panda3D
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dynamicTextPage.h
00001 // Filename: dynamicTextPage.h
00002 // Created by:  drose (09Feb02)
00003 //
00004 ////////////////////////////////////////////////////////////////////
00005 //
00006 // PANDA 3D SOFTWARE
00007 // Copyright (c) Carnegie Mellon University.  All rights reserved.
00008 //
00009 // All use of this software is subject to the terms of the revised BSD
00010 // license.  You should have received a copy of this license along
00011 // with this source code in a file named "LICENSE."
00012 //
00013 ////////////////////////////////////////////////////////////////////
00014 
00015 #ifndef DYNAMICTEXTPAGE_H
00016 #define DYNAMICTEXTPAGE_H
00017 
00018 #include "pandabase.h"
00019 
00020 #ifdef HAVE_FREETYPE
00021 
00022 #include "texture.h"
00023 #include "dynamicTextGlyph.h"
00024 #include "pointerTo.h"
00025 #include "pvector.h"
00026 
00027 class DynamicTextFont;
00028 
00029 ////////////////////////////////////////////////////////////////////
00030 //       Class : DynamicTextPage
00031 // Description : A single "page" of a DynamicTextFont.  This is a
00032 //               single texture that holds a number of glyphs for
00033 //               rendering.  The font starts out with one page, and
00034 //               will add more as it needs them.
00035 ////////////////////////////////////////////////////////////////////
00036 class EXPCL_PANDA_TEXT DynamicTextPage : public Texture {
00037 public:
00038   DynamicTextPage(DynamicTextFont *font, int page_number);
00039 
00040   DynamicTextGlyph *slot_glyph(int character, 
00041                                int x_size, int y_size, int margin);
00042 
00043   INLINE int get_x_size() const;
00044   INLINE int get_y_size() const;
00045 
00046   void fill_region(int x, int y, int x_size, int y_size, const LColor &color);
00047 
00048 PUBLISHED:
00049   INLINE bool is_empty() const;
00050 
00051 private:
00052   int garbage_collect(DynamicTextFont *font);
00053 
00054   bool find_hole(int &x, int &y, int x_size, int y_size) const;
00055   DynamicTextGlyph *find_overlap(int x, int y, int x_size, int y_size) const;
00056 
00057   typedef pvector< PT(DynamicTextGlyph) > Glyphs;
00058   Glyphs _glyphs;
00059 
00060   int _x_size, _y_size;
00061 
00062   DynamicTextFont *_font;
00063 
00064 public:
00065   static TypeHandle get_class_type() {
00066     return _type_handle;
00067   }
00068   static void init_type() {
00069     Texture::init_type();
00070     register_type(_type_handle, "DynamicTextPage",
00071                   Texture::get_class_type());
00072   }
00073   virtual TypeHandle get_type() const {
00074     return get_class_type();
00075   }
00076   virtual TypeHandle force_init_type() {init_type(); return get_class_type();}
00077 
00078 private:
00079   static TypeHandle _type_handle;
00080 
00081   friend class DynamicTextFont;
00082 };
00083 
00084 #include "dynamicTextPage.I"
00085 
00086 #endif  // HAVE_FREETYPE
00087 
00088 #endif
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