//---------------------------------------------------------------------------- // Anti-Grain Geometry (AGG) - Version 2.5 // A high quality rendering engine for C++ // Copyright (C) 2002-2006 Maxim Shemanarev // Contact: mcseem@antigrain.com // mcseemagg@yahoo.com // http://antigrain.com // // AGG is free software; you can redistribute it and/or // modify it under the terms of the GNU General Public License // as published by the Free Software Foundation; either version 2 // of the License, or (at your option) any later version. // // AGG is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // // You should have received a copy of the GNU General Public License // along with AGG; if not, write to the Free Software // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, // MA 02110-1301, USA. //---------------------------------------------------------------------------- #ifndef AGG_FONT_FREETYPE_INCLUDED #define AGG_FONT_FREETYPE_INCLUDED #include <ft2build.h> #include FT_FREETYPE_H #include "agg_scanline_storage_aa.h" #include "agg_scanline_storage_bin.h" #include "agg_scanline_u.h" #include "agg_scanline_bin.h" #include "agg_path_storage_integer.h" #include "agg_rasterizer_scanline_aa.h" #include "agg_conv_curve.h" #include "agg_font_cache_manager.h" #include "agg_trans_affine.h" namespace agg { //-----------------------------------------------font_engine_freetype_base class font_engine_freetype_base { public: //-------------------------------------------------------------------- typedef serialized_scanlines_adaptor_aa<int8u> gray8_adaptor_type; typedef serialized_scanlines_adaptor_bin mono_adaptor_type; typedef scanline_storage_aa8 scanlines_aa_type; typedef scanline_storage_bin scanlines_bin_type; //-------------------------------------------------------------------- ~font_engine_freetype_base(); font_engine_freetype_base(bool flag32, unsigned max_faces = 32); // Set font parameters //-------------------------------------------------------------------- void resolution(unsigned dpi); bool load_font(const char* font_name, unsigned face_index, glyph_rendering ren_type, const char* font_mem = 0, const long font_mem_size = 0); bool attach(const char* file_name); bool char_map(FT_Encoding map); bool height(double h); bool width(double w); void hinting(bool h); void flip_y(bool f); void transform(const trans_affine& affine); // Set Gamma //-------------------------------------------------------------------- template<class GammaF> void gamma(const GammaF& f) { m_rasterizer.gamma(f); } // Accessors //-------------------------------------------------------------------- int last_error() const { return m_last_error; } unsigned resolution() const { return m_resolution; } const char* name() const { return m_name; } unsigned num_faces() const; FT_Encoding char_map() const { return m_char_map; } double height() const { return double(m_height) / 64.0; } double width() const { return double(m_width) / 64.0; } double ascender() const; double descender() const; bool hinting() const { return m_hinting; } bool flip_y() const { return m_flip_y; } // Interface mandatory to implement for font_cache_manager //-------------------------------------------------------------------- const char* font_signature() const { return m_signature; } int change_stamp() const { return m_change_stamp; } bool prepare_glyph(unsigned glyph_code); unsigned glyph_index() const { return m_glyph_index; } unsigned data_size() const { return m_data_size; } glyph_data_type data_type() const { return m_data_type; } const rect_i& bounds() const { return m_bounds; } double advance_x() const { return m_advance_x; } double advance_y() const { return m_advance_y; } void write_glyph_to(int8u* data) const; bool add_kerning(unsigned first, unsigned second, double* x, double* y); private: font_engine_freetype_base(const font_engine_freetype_base&); const font_engine_freetype_base& operator = (const font_engine_freetype_base&); void update_char_size(); void update_signature(); int find_face(const char* face_name) const; bool m_flag32; int m_change_stamp; int m_last_error; char* m_name; unsigned m_name_len; unsigned m_face_index; FT_Encoding m_char_map; char* m_signature; unsigned m_height; unsigned m_width; bool m_hinting; bool m_flip_y; bool m_library_initialized; FT_Library m_library; // handle to library FT_Face* m_faces; // A pool of font faces char** m_face_names; unsigned m_num_faces; unsigned m_max_faces; FT_Face m_cur_face; // handle to the current face object int m_resolution; glyph_rendering m_glyph_rendering; unsigned m_glyph_index; unsigned m_data_size; glyph_data_type m_data_type; rect_i m_bounds; double m_advance_x; double m_advance_y; trans_affine m_affine; path_storage_integer<int16, 6> m_path16; path_storage_integer<int32, 6> m_path32; conv_curve<path_storage_integer<int16, 6> > m_curves16; conv_curve<path_storage_integer<int32, 6> > m_curves32; scanline_u8 m_scanline_aa; scanline_bin m_scanline_bin; scanlines_aa_type m_scanlines_aa; scanlines_bin_type m_scanlines_bin; rasterizer_scanline_aa<> m_rasterizer; }; //------------------------------------------------font_engine_freetype_int16 // This class uses values of type int16 (10.6 format) for the vector cache. // The vector cache is compact, but when rendering glyphs of height // more that 200 there integer overflow can occur. // class font_engine_freetype_int16 : public font_engine_freetype_base { public: typedef serialized_integer_path_adaptor<int16, 6> path_adaptor_type; typedef font_engine_freetype_base::gray8_adaptor_type gray8_adaptor_type; typedef font_engine_freetype_base::mono_adaptor_type mono_adaptor_type; typedef font_engine_freetype_base::scanlines_aa_type scanlines_aa_type; typedef font_engine_freetype_base::scanlines_bin_type scanlines_bin_type; font_engine_freetype_int16(unsigned max_faces = 32) : font_engine_freetype_base(false, max_faces) {} }; //------------------------------------------------font_engine_freetype_int32 // This class uses values of type int32 (26.6 format) for the vector cache. // The vector cache is twice larger than in font_engine_freetype_int16, // but it allows you to render glyphs of very large sizes. // class font_engine_freetype_int32 : public font_engine_freetype_base { public: typedef serialized_integer_path_adaptor<int32, 6> path_adaptor_type; typedef font_engine_freetype_base::gray8_adaptor_type gray8_adaptor_type; typedef font_engine_freetype_base::mono_adaptor_type mono_adaptor_type; typedef font_engine_freetype_base::scanlines_aa_type scanlines_aa_type; typedef font_engine_freetype_base::scanlines_bin_type scanlines_bin_type; font_engine_freetype_int32(unsigned max_faces = 32) : font_engine_freetype_base(true, max_faces) {} }; } #endif |