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annotate libinterp/corefcn/text-renderer.cc @ 31231:a026fb2be108

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sparse-xpow.cc: Return empty matrix for empty input (bug #63080)
author Arun Giridhar <arungiridhar@gmail.com>
date Mon, 19 Sep 2022 07:05:31 -0400
parents 796f54d4ddbf
children e88a07dec498
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1 ////////////////////////////////////////////////////////////////////////
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2 //
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3 // Copyright (C) 2009-2022 The Octave Project Developers
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4 //
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5 // See the file COPYRIGHT.md in the top-level directory of this
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6 // distribution or <https://octave.org/copyright/>.
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7 //
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8 // This file is part of Octave.
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9 //
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10 // Octave is free software: you can redistribute it and/or modify it
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11 // under the terms of the GNU General Public License as published by
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12 // the Free Software Foundation, either version 3 of the License, or
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13 // (at your option) any later version.
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14 //
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15 // Octave is distributed in the hope that it will be useful, but
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16 // WITHOUT ANY WARRANTY; without even the implied warranty of
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17 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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18 // GNU General Public License for more details.
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19 //
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20 // You should have received a copy of the GNU General Public License
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21 // along with Octave; see the file COPYING. If not, see
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22 // <https://www.gnu.org/licenses/>.
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23 //
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24 ////////////////////////////////////////////////////////////////////////
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25
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26 #if defined (HAVE_CONFIG_H)
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27 # include "config.h"
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28 #endif
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29
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30 #include "base-text-renderer.h"
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31 #include "error.h"
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32 #include "errwarn.h"
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33 #include "ft-text-renderer.h"
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34 #include "latex-text-renderer.h"
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35 #include "text-renderer.h"
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36
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37 namespace octave
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38 {
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39 text_renderer::text_renderer (void)
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40 : m_rep (make_ft_text_renderer ()),
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41 m_latex_rep (make_latex_text_renderer ())
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42 { }
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43
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44 text_renderer::~text_renderer (void)
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45 {
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46 delete m_rep;
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47 delete m_latex_rep;
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48 }
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49
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50 bool
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51 text_renderer::ok (void) const
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52 {
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53 static bool warned = false;
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54
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55 if (! m_rep)
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56 {
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57 if (! warned)
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58 {
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59 warn_disabled_feature ("opengl_renderer::render_text",
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60 "rendering text (FreeType)");
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61
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62 warned = true;
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63 }
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64 }
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65
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66 return m_rep != nullptr;
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67 }
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68
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69 Matrix
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70 text_renderer::get_extent (text_element *elt, double rotation)
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71 {
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72 static Matrix empty_extent (1, 4, 0.0);
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73
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74 return ok () ? m_rep->get_extent (elt, rotation) : empty_extent;
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75 }
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76
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77 Matrix
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78 text_renderer::get_extent (const std::string& txt, double rotation,
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79 const caseless_str& interpreter)
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80 {
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81 static Matrix retval (1, 4, 0.0);
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82
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83 if (interpreter == "latex" && m_latex_rep->ok ())
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84 retval = m_latex_rep->get_extent (txt, rotation, interpreter);
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85 else if (ok ())
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86 retval = m_rep->get_extent (txt, rotation, interpreter);
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87
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88 return retval;
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89 }
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90
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91 void
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92 text_renderer::set_anti_aliasing (bool val)
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93 {
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94 if (ok ())
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95 m_rep->set_anti_aliasing (val);
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96 }
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97
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98 octave_map
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99 text_renderer::get_system_fonts (void)
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100 {
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101 octave_map retval;
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102
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103 if (ok ())
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104 retval = m_rep->get_system_fonts ();
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105
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106 return retval;
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107 }
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108
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109 void
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110 text_renderer::set_font (const std::string& name, const std::string& weight,
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111 const std::string& angle, double size)
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112 {
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113 if (ok ())
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114 {
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115 m_rep->set_font (name, weight, angle, size);
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116 m_latex_rep->set_font (name, weight, angle, size);
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117 }
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118 }
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119
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120 void
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121 text_renderer::set_color (const Matrix& c)
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122 {
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123 if (ok ())
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124 {
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125 m_rep->set_color (c);
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126 m_latex_rep->set_color (c);
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127 }
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128 }
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129
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130 void
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131 text_renderer::text_to_pixels (const std::string& txt,
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132 uint8NDArray& pxls, Matrix& bbox,
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133 int halign, int valign, double rotation,
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134 const caseless_str& interpreter,
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135 bool handle_rotation)
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136 {
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137 static Matrix empty_bbox (1, 4, 0.0);
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138 static uint8NDArray empty_pxls;
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139
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140 if (interpreter == "latex" && m_latex_rep->ok ())
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141 m_latex_rep->text_to_pixels (txt, pxls, bbox, halign, valign, rotation,
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142 interpreter, handle_rotation);
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143 else if (ok ())
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144 m_rep->text_to_pixels (txt, pxls, bbox, halign, valign, rotation,
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145 interpreter, handle_rotation);
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146 else
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147 {
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148 bbox = empty_bbox;
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149 pxls = empty_pxls;
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150 }
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151 }
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152
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153 void
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154 text_renderer::text_to_strlist (const std::string& txt,
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155 std::list<text_renderer::string>& lst,
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156 Matrix& bbox, int halign, int valign,
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157 double rotation,
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158 const caseless_str& interpreter)
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159 {
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160 static Matrix empty_bbox (1, 4, 0.0);
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161 static std::list<text_renderer::string> empty_lst;
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162
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163 if (interpreter == "latex" && m_latex_rep->ok ())
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164 m_latex_rep->text_to_strlist (txt, lst, bbox, halign, valign, rotation,
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165 interpreter);
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166 else if (ok ())
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167 m_rep->text_to_strlist (txt, lst, bbox, halign, valign, rotation,
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168 interpreter);
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169 else
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170 {
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171 bbox = empty_bbox;
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172 lst = empty_lst;
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173 }
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174 }
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175 }