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annotate libinterp/corefcn/txt-eng-ft.h @ 20945:9d9270e2f98f

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eliminate comments after preprocessor conditionals * annotation-dialog.h, gl-select.h, documentation-dock-widget.h, files-dock-widget.h, find-files-dialog.h, find-files-model.h, history-dock-widget.h, file-editor-interface.h, file-editor.h, find-dialog.h, main-window.h, resource-manager.h, settings-dialog.h, shortcut-manager.h, terminal-dock-widget.h, welcome-wizard.h, defun-int.h, gl2ps-renderer.h, load-save.cc, ls-hdf5.cc, ls-mat5.cc, octave-link.h, sighandlers.cc, txt-eng-ft.cc, txt-eng-ft.h, zfstream.cc, zfstream.h, ov-cx-mat.cc, ov-cx-sparse.cc, ov-flt-cx-mat.cc, ov-flt-re-mat.cc, ov-java.cc, ov-re-mat.cc, ov-re-sparse.cc, Sparse-diag-op-defs.h, Sparse-perm-op-defs.h, oct-env.cc, oct-refcount.h, sparse-util.cc, statdefs.h, main.in.cc: Eliminate comments after preprocessor conditionals.
author John W. Eaton <jwe@octave.org>
date Fri, 18 Dec 2015 22:06:22 -0500
parents 5b7643257978
children
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1 /*
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2
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3 Copyright (C) 2009-2015 Michael Goffioul
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4
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5 This file is part of Octave.
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6
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7 Octave is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by the
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9 Free Software Foundation; either version 3 of the License, or (at your
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10 option) any later version.
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11
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12 Octave is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with Octave; see the file COPYING. If not, see
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19 <http://www.gnu.org/licenses/>.
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20
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21 */
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22
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23 #if ! defined (txt_eng_ft_h)
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24 #define txt_eng_ft_h 1
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25
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26 #if HAVE_FREETYPE
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27
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28 #include <list>
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29 #include <vector>
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30
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31 #include <ft2build.h>
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32 #include FT_FREETYPE_H
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33
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34 #include <dMatrix.h>
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35 #include <uint8NDArray.h>
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36 #include "txt-eng.h"
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37
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38 class
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39 OCTINTERP_API
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40 ft_render : public text_processor
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41 {
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42 public:
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43 enum
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44 {
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45 MODE_BBOX = 0,
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46 MODE_RENDER = 1
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47 };
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48
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49 enum
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50 {
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51 ROTATION_0 = 0,
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52 ROTATION_90 = 1,
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53 ROTATION_180 = 2,
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54 ROTATION_270 = 3
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55 };
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56
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57 public:
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58
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59 ft_render (void);
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60
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61 ~ft_render (void);
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62
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63 void visit (text_element_string& e);
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64
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65 void visit (text_element_list& e);
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66
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67 void visit (text_element_subscript& e);
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68
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69 void visit (text_element_superscript& e);
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70
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71 void visit (text_element_color& e);
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72
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73 void visit (text_element_fontsize& e);
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75 void visit (text_element_fontname& e);
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77 void visit (text_element_fontstyle& e);
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79 void visit (text_element_symbol& e);
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80
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81 void visit (text_element_combined& e);
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82
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83 void reset (void);
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84
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85 uint8NDArray get_pixels (void) const { return pixels; }
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86
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87 Matrix get_boundingbox (void) const { return bbox; }
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88
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89 uint8NDArray render (text_element* elt, Matrix& box,
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90 int rotation = ROTATION_0);
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91
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92 Matrix get_extent (text_element *elt, double rotation = 0.0);
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93 Matrix get_extent (const std::string& txt, double rotation = 0.0,
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94 const caseless_str& interpreter = "tex");
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95
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96 void set_font (const std::string& name, const std::string& weight,
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97 const std::string& angle, double size);
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98
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99 void set_color (Matrix c);
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100
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101 void set_mode (int m);
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102
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103 void text_to_pixels (const std::string& txt,
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104 uint8NDArray& pixels_, Matrix& bbox,
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105 int halign, int valign, double rotation,
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106 const caseless_str& interpreter = "tex",
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107 bool handle_rotation = true);
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108
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109 private:
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110 int rotation_to_mode (double rotation) const;
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111
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112 // No copying!
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113
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114 ft_render (const ft_render&);
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115
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116 ft_render& operator = (const ft_render&);
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117
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118 // Class to hold information about fonts and a strong
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119 // reference to the font objects loaded by FreeType.
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120 class ft_font
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121 {
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122 public:
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123 ft_font (void)
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124 : name (), weight (), angle (), size (0), face (0) { }
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125
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126 ft_font (const std::string& nm, const std::string& wt,
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127 const std::string& ang, double sz, FT_Face f = 0)
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128 : name (nm), weight (wt), angle (ang), size (sz), face (f) { }
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129
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130 ft_font (const ft_font& ft);
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132 ~ft_font (void)
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133 {
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134 if (face)
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135 FT_Done_Face (face);
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136 }
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137
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138 ft_font& operator = (const ft_font& ft);
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139
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140 bool is_valid (void) const { return get_face (); }
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141
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142 std::string get_name (void) const { return name; }
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143
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144 std::string get_weight (void) const { return weight; }
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145
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146 std::string get_angle (void) const { return angle; }
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147
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148 double get_size (void) const { return size; }
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149
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150 FT_Face get_face (void) const;
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151
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152 private:
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153 std::string name;
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154 std::string weight;
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155 std::string angle;
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156 double size;
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157 mutable FT_Face face;
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158 };
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159
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160 void push_new_line (void);
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161
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162 void update_line_bbox (void);
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163
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164 void compute_bbox (void);
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165
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166 int compute_line_xoffset (const Matrix& lb) const;
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167
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168 FT_UInt process_character (FT_ULong code, FT_UInt previous = 0);
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169
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170 public:
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171 // A class to store informations on substrings after parsing.
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172 class ft_string : public ft_font
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173 {
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174 public:
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175 ft_string (const std::string s, const std::string fontang,
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176 const std::string fontwgt, const std::string nm,
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177 const double fontsz, const double x0, const double y0)
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178 : ft_font (nm, fontwgt, fontang, fontsz),
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179 string(s), x(x0), y(y0), z(0.0), code(0),
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180 color(Matrix (1,3,0.0)){ }
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181
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182 void set_string (const std::string str) { string = str; }
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183
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184 std::string get_string (void) const { return string; }
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185
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186 void set_x (const double x0) { x = x0; }
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187
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188 double get_x (void) const { return x; }
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189
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190 void set_y (const double y0) { y = y0; }
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191
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192 double get_y (void) const { return y; }
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193
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194 void set_z (const double z0) { z = z0; }
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195
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196 double get_z (void) const { return z; }
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197
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198 void set_code (const uint32_t c) { code = c; }
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199
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200 uint32_t get_code (void) const { return code; }
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201
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202 void set_color (const uint8NDArray c)
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203 {
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204 color(0) = static_cast<double> (c(0)) / 255;
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205 color(1) = static_cast<double> (c(1)) / 255;
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206 color(2) = static_cast<double> (c(2)) / 255;
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207 }
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208
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209 Matrix get_color (void) const { return color; }
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210
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211 private:
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212 std::string string;
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213 double x, y, z;
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214 uint32_t code;
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215 Matrix color;
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216 };
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217
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218 void text_to_strlist (const std::string& txt,
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219 std::list<ft_string>& lst, Matrix& box,
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220 int ha, int va, double rot,
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221 const caseless_str& interp = "tex")
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222 {
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223 uint8NDArray pixels_;
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224 // First run text_to_pixels which will also build the string list
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225 text_to_pixels (txt, pixels_, box, ha, va, rot, interp, false);
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226
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227 lst = strlist;
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228 }
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229
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230 private:
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231 // The current font used by the renderer.
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232 ft_font font;
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233
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234 // Used to stored the bounding box corresponding to the rendered text.
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235 // The bounding box has the form [x, y, w, h] where x and y represent the
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236 // coordinates of the bottom left corner relative to the anchor point of
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237 // the text (== start of text on the baseline). Due to font descent or
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238 // multiple lines, the value y is usually negative.
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239 Matrix bbox;
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240
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241 // Used to stored the rendered text. It's a 3D matrix with size MxNx4
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242 // where M and N are the width and height of the bounding box.
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243 uint8NDArray pixels;
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244
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245 // Used to store the bounding box of each line. This is used to layout
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246 // multiline text properly.
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247 std::list<Matrix> line_bbox;
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248
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249 // The current horizontal alignment. This is used to align multi-line text.
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250 int halign;
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251
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252 // The X offset for the next glyph.
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253 int xoffset;
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254
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255 // The Y offset of the baseline for the current line.
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256 int line_yoffset;
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257
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258 // The Y offset of the baseline for the next glyph. The offset is relative
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259 // to line_yoffset. The total Y offset is computed with:
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260 // line_yoffset + yoffset.
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261 int yoffset;
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262
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263 // The current mode of the rendering process (box computing or rendering).
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264 int mode;
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265
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266 // The base color of the rendered text.
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267 uint8NDArray color;
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268
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269 // A list of parsed strings to be used for printing.
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270 std::list<ft_string> strlist;
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271
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272 // The X offset of the baseline for the current line.
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273 int line_xoffset;
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274
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275 };
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276
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277 #endif
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278
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279 #endif