Panda3D
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00001 // Filename: dynamicTextFont.h 00002 // Created by: drose (08Feb02) 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 DYNAMICTEXTFONT_H 00016 #define DYNAMICTEXTFONT_H 00017 00018 #include "pandabase.h" 00019 00020 #ifdef HAVE_FREETYPE 00021 00022 #include "textFont.h" 00023 #include "freetypeFont.h" 00024 #include "dynamicTextGlyph.h" 00025 #include "dynamicTextPage.h" 00026 #include "filename.h" 00027 #include "pvector.h" 00028 #include "pmap.h" 00029 00030 #include <ft2build.h> 00031 #include FT_FREETYPE_H 00032 00033 class NurbsCurveResult; 00034 00035 //////////////////////////////////////////////////////////////////// 00036 // Class : DynamicTextFont 00037 // Description : A DynamicTextFont is a special TextFont object that 00038 // rasterizes its glyphs from a standard font file 00039 // (e.g. a TTF file) on the fly. It requires the 00040 // FreeType 2.0 library (or any higher, 00041 // backward-compatible version). 00042 //////////////////////////////////////////////////////////////////// 00043 class EXPCL_PANDA_TEXT DynamicTextFont : public TextFont, public FreetypeFont { 00044 PUBLISHED: 00045 DynamicTextFont(const Filename &font_filename, int face_index = 0); 00046 DynamicTextFont(const char *font_data, int data_length, int face_index); 00047 DynamicTextFont(const DynamicTextFont ©); 00048 virtual ~DynamicTextFont(); 00049 00050 virtual PT(TextFont) make_copy() const; 00051 00052 INLINE const string &get_name() const; 00053 00054 INLINE bool set_point_size(PN_stdfloat point_size); 00055 INLINE PN_stdfloat get_point_size() const; 00056 00057 INLINE bool set_pixels_per_unit(PN_stdfloat pixels_per_unit); 00058 INLINE PN_stdfloat get_pixels_per_unit() const; 00059 00060 INLINE bool set_scale_factor(PN_stdfloat scale_factor); 00061 INLINE PN_stdfloat get_scale_factor() const; 00062 00063 INLINE void set_native_antialias(bool native_antialias); 00064 INLINE bool get_native_antialias() const; 00065 00066 INLINE int get_font_pixel_size() const; 00067 00068 INLINE PN_stdfloat get_line_height() const; 00069 INLINE PN_stdfloat get_space_advance() const; 00070 00071 INLINE void set_texture_margin(int texture_margin); 00072 INLINE int get_texture_margin() const; 00073 INLINE void set_poly_margin(PN_stdfloat poly_margin); 00074 INLINE PN_stdfloat get_poly_margin() const; 00075 00076 INLINE void set_page_size(int x_size, int y_size); 00077 INLINE int get_page_x_size() const; 00078 INLINE int get_page_y_size() const; 00079 00080 INLINE void set_minfilter(Texture::FilterType filter); 00081 INLINE Texture::FilterType get_minfilter() const; 00082 INLINE void set_magfilter(Texture::FilterType filter); 00083 INLINE Texture::FilterType get_magfilter() const; 00084 INLINE void set_anisotropic_degree(int anisotropic_degree); 00085 INLINE int get_anisotropic_degree() const; 00086 00087 INLINE void set_render_mode(RenderMode render_mode); 00088 INLINE RenderMode get_render_mode() const; 00089 INLINE void set_winding_order(WindingOrder winding_order); 00090 INLINE WindingOrder get_winding_order() const; 00091 00092 INLINE void set_fg(const LColor &fg); 00093 INLINE const LColor &get_fg() const; 00094 INLINE void set_bg(const LColor &bg); 00095 INLINE const LColor &get_bg() const; 00096 INLINE void set_outline(const LColor &outline_color, PN_stdfloat outline_width, 00097 PN_stdfloat outline_feather); 00098 INLINE const LColor &get_outline_color() const; 00099 INLINE PN_stdfloat get_outline_width() const; 00100 INLINE PN_stdfloat get_outline_feather() const; 00101 INLINE Texture::Format get_tex_format() const; 00102 00103 int get_num_pages() const; 00104 DynamicTextPage *get_page(int n) const; 00105 MAKE_SEQ(get_pages, get_num_pages, get_page); 00106 00107 int garbage_collect(); 00108 void clear(); 00109 00110 virtual void write(ostream &out, int indent_level) const; 00111 00112 public: 00113 virtual bool get_glyph(int character, const TextGlyph *&glyph); 00114 00115 private: 00116 void initialize(); 00117 void update_filters(); 00118 void determine_tex_format(); 00119 DynamicTextGlyph *make_glyph(int character, FT_Face face, int glyph_index); 00120 void copy_bitmap_to_texture(const FT_Bitmap &bitmap, DynamicTextGlyph *glyph); 00121 void copy_pnmimage_to_texture(const PNMImage &image, DynamicTextGlyph *glyph); 00122 void blend_pnmimage_to_texture(const PNMImage &image, DynamicTextGlyph *glyph, 00123 const LColor &fg); 00124 DynamicTextGlyph *slot_glyph(int character, int x_size, int y_size); 00125 00126 void render_wireframe_contours(DynamicTextGlyph *glyph); 00127 void render_polygon_contours(DynamicTextGlyph *glyph, bool face, bool extrude); 00128 00129 static int outline_move_to(const FT_Vector *to, void *user); 00130 static int outline_line_to(const FT_Vector *to, void *user); 00131 static int outline_conic_to(const FT_Vector *control, 00132 const FT_Vector *to, void *user); 00133 static int outline_cubic_to(const FT_Vector *control1, 00134 const FT_Vector *control2, 00135 const FT_Vector *to, void *user); 00136 int outline_nurbs(NurbsCurveResult *ncr); 00137 00138 int _texture_margin; 00139 PN_stdfloat _poly_margin; 00140 int _page_x_size, _page_y_size; 00141 00142 Texture::FilterType _minfilter; 00143 Texture::FilterType _magfilter; 00144 int _anisotropic_degree; 00145 00146 RenderMode _render_mode; 00147 WindingOrder _winding_order; 00148 00149 LColor _fg, _bg, _outline_color; 00150 PN_stdfloat _outline_width; 00151 PN_stdfloat _outline_feather; 00152 bool _has_outline; 00153 Texture::Format _tex_format; 00154 bool _needs_image_processing; 00155 00156 typedef pvector< PT(DynamicTextPage) > Pages; 00157 Pages _pages; 00158 int _preferred_page; 00159 00160 // This doesn't need to be a reference-counting pointer, because the 00161 // reference to each glyph is kept by the DynamicTextPage object. 00162 typedef pmap<int, DynamicTextGlyph *> Cache; 00163 Cache _cache; 00164 00165 // This is a list of the glyphs that do not have any printable 00166 // properties (e.g. space), but still have an advance measure. We 00167 // store them here to keep their reference counts; they also appear 00168 // in the above table. 00169 typedef pvector< PT(DynamicTextGlyph) > EmptyGlyphs; 00170 EmptyGlyphs _empty_glyphs; 00171 00172 class ContourPoint { 00173 public: 00174 INLINE ContourPoint(const LPoint2 &p, const LVector2 &in, 00175 const LVector2 &out); 00176 INLINE ContourPoint(PN_stdfloat px, PN_stdfloat py, PN_stdfloat tx, PN_stdfloat ty); 00177 INLINE void connect_to(const LVector2 &out); 00178 LPoint2 _p; 00179 LVector2 _in, _out; // tangents into and out of the vertex. 00180 }; 00181 typedef pvector<ContourPoint> Points; 00182 00183 class Contour { 00184 public: 00185 Points _points; 00186 bool _is_solid; 00187 int _start_vertex; 00188 }; 00189 00190 typedef pvector<Contour> Contours; 00191 Contours _contours; 00192 LPoint2 _q; // The "current point". 00193 00194 public: 00195 static TypeHandle get_class_type() { 00196 return _type_handle; 00197 } 00198 static void init_type() { 00199 TextFont::init_type(); 00200 register_type(_type_handle, "DynamicTextFont", 00201 TextFont::get_class_type()); 00202 } 00203 virtual TypeHandle get_type() const { 00204 return get_class_type(); 00205 } 00206 virtual TypeHandle force_init_type() {init_type(); return get_class_type();} 00207 00208 private: 00209 static TypeHandle _type_handle; 00210 00211 friend class TextNode; 00212 }; 00213 00214 INLINE ostream &operator << (ostream &out, const DynamicTextFont &dtf); 00215 00216 #include "dynamicTextFont.I" 00217 00218 #endif // HAVE_FREETYPE 00219 00220 #endif