-/* $Id$
-
-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 {
class PrimitiveBuilder;
class Texture2D;
+/**
+Stores a set of glyphs and creates strings out of them.
+*/
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;
+ float cap_height;
+ float x_height;
+ 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; }
+
+ /** Adds a glyph to the font. There must not be an existing glyph with the
+ same code. */
+ void add_glyph(const Glyph &);
+ void set_kerning(unsigned, unsigned, float);
+
+ /** Returns the size used to generate the font texture. This serves as a
+ hint for obtaining the best quality when rendering strings. */
+ 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_cap_height() const { return cap_height; }
+ float get_x_height() const { return x_height; }
+
+ /** Returns the width of a string, in multiples of the font size. Scale the
+ result according to the size used in rendering. */
+ float get_string_width(const std::string &, StringCodec::Decoder &) const;
template<class C>
float get_string_width(const std::string &str) const
}
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. It is drawn with size
+ 1.0; set up matrices for the desired size before the call. */
+ 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. Two-dimensional vertex and texture
+ coordinates are generated. Size 1.0 is used for building; set up the
+ builder's matrix before the call. 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_quad(const Glyph &, PrimitiveBuilder &) const;
+ float get_glyph_advance(unsigned, unsigned = 0) const;
};
} // namespace GL
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