Add kerning support to Font

[libs/gl.git] / source / font.h

diff --git a/source/font.h b/source/font.h
index a2406b9ee043009824dbe1787fd7a05d6b583038..5fcc63c4414dee39064c7a63fcd92bd35497d4a2 100644 (file)
--- a/source/font.h
+++ b/source/font.h
@@ -1,17 +1,10 @@
-/* $Id$
-
-This file is part of libmspgl
-Copyright © 2007  Mikko Rasa, Mikkosoft Productions
-Distributed under the LGPL
-*/
-
 #ifndef MSP_GL_FONT_H_
 #define MSP_GL_FONT_H_
 
 #include <map>
 #include <string>
-#include <msp/datafile/collection.h>
-#include <msp/strings/utf8.h>
+#include <msp/datafile/objectloader.h>
+#include <msp/stringcodec/utf8.h>
 #include "vertexarray.h"
 
 namespace Msp {
@@ -23,38 +16,63 @@ class Texture2D;
 class Font
 {
 public:
-       class Loader: public DataFile::Loader
+       class Loader: public DataFile::CollectionObjectLoader<Font>
        {
-       private:
-               Font &font;
-               DataFile::Collection *coll;
-
        public:
-               typedef DataFile::Collection Collection;
-
                Loader(Font &);
-               Loader(Font &, DataFile::Collection &);
-               Font &get_object() { return font; }
-               DataFile::Collection &get_collection();
+               Loader(Font &, Collection &);
+
        private:
                void init();
                void glyph(unsigned);
-               void texture_inline();
+               void kerning(unsigned, unsigned, float);
+               void texture();
+               void texture_ref(const std::string &);
        };
 
+       struct Glyph
+       {
+               class Loader: public Msp::DataFile::ObjectLoader<Glyph>
+               {
+               public:
+                       Loader(Glyph &);
+               private:
+                       void texcoords(float, float, float, float);
+               };
+
+               unsigned code;
+               float x1,y1;
+               float x2,y2;
+               float w,h;
+               float off_x, off_y;
+               float advance;
+       };
+
+private:
+       typedef std::map<unsigned, Glyph> GlyphMap;
+       typedef std::pair<unsigned, unsigned> KerningKey;
+       typedef std::map<KerningKey, float> KerningMap;
+
+       RefPtr<const Texture2D> texture;
+       float native_size;
+       float ascent;
+       float descent;
+       GlyphMap glyphs;
+       KerningMap kerning;
+
+public:
        Font();
        ~Font();
 
-       void  set_texture(const Texture2D &);
+       void set_texture(const Texture2D &);
        const Texture2D &get_texture() const;
-       void  add_glyph(unsigned, float, float, float, float, float, float, float, float, float);
-       float get_default_size() const { return default_size; }
+       void add_glyph(const Glyph &);
+       void set_kerning(unsigned, unsigned, float);
+       float get_native_size() const { return native_size; }
        float get_ascent() const { return ascent; }
        float get_descent() const { return descent; }
-       float get_string_width(const std::string &, Codecs::Decoder &) const;
-       void  draw_glyph(unsigned);
-       void  draw_string(const std::string &, Codecs::Decoder &) const;
-       void  draw_string(const std::string &, Codecs::Decoder &, PrimitiveBuilder &) const;
+
+       float get_string_width(const std::string &, StringCodec::Decoder &) const;
 
        template<class C>
        float get_string_width(const std::string &str) const
@@ -64,60 +82,40 @@ public:
        }
 
        float get_string_width(const std::string &str) const
-       { return get_string_width<Codecs::Utf8>(str); }
+       { return get_string_width<StringCodec::Utf8>(str); }
+
+       /// Draws a string to the framebuffer with Immediate.
+       void draw_string(const std::string &, StringCodec::Decoder &, const Color & = Color()) const;
 
        template<class C>
-       void draw_string(const std::string &str) const
+       void draw_string(const std::string &str, const Color &color = Color()) const
        {
                typename C::Decoder dec;
-               draw_string(str, dec);
+               draw_string(str, dec, color);
        }
 
-       void draw_string(const std::string &str) const
-       { draw_string<Codecs::Utf8>(str); }
+       void draw_string(const std::string &str, const Color &color = Color()) const
+       { draw_string<StringCodec::Utf8>(str, color); }
+
+       /** Builds the primitives for a string.  The PrimitiveBuilder should be
+       associated with a target that has at least VERTEX2 and TEXCOORD2 components.
+       The texture is not bound, to avoid unnecessary bindings when creating
+       meshes. */
+       void build_string(const std::string &, StringCodec::Decoder &, PrimitiveBuilder &) const;
 
        template<class C>
-       void draw_string(const std::string &str, PrimitiveBuilder &pb) const
+       void build_string(const std::string &str, PrimitiveBuilder &pb) const
        {
                typename C::Decoder dec;
-               draw_string(str, dec, pb);
+               build_string(str, dec, pb);
        }
 
-       void draw_string(const std::string &str, PrimitiveBuilder &pb) const
-       { return draw_string<Codecs::Utf8>(str, pb); }
+       void build_string(const std::string &str, PrimitiveBuilder &pb) const
+       { return build_string<StringCodec::Utf8>(str, pb); }
 
 private:
-       struct Glyph
-       {
-               class Loader: public Msp::DataFile::Loader
-               {
-               public:
-                       Loader(Glyph &);
-                       Glyph &get_object() { return glyph; }
-               private:
-                       Glyph &glyph;
-
-                       void texcoords(float, float, float, float);
-               };
-
-               unsigned code;
-               float x1,y1;
-               float x2,y2;
-               float w,h;
-               float off_x, off_y;
-               float advance;
-       };
-       typedef std::map<unsigned, Glyph> GlyphMap;
-
-       const Texture2D *tex;
-       bool     own_tex;
-       float    default_size;
-       float    ascent;
-       float    descent;
-       GlyphMap glyphs;
-
-       void create_glyph_vertices(const Glyph &, VertexBuilder &, float) const;
-       float get_glyph_advance(unsigned) const;
+       void create_glyph_vertices(const Glyph &, VertexBuilder &) const;
+       float get_glyph_advance(unsigned, unsigned = 0) const;
 };
 
 } // namespace GL