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1 /**************************************************************************** |
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2 ** |
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3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). |
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4 ** All rights reserved. |
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5 ** Contact: Nokia Corporation (qt-info@nokia.com) |
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6 ** |
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7 ** This file is part of the QtGui module of the Qt Toolkit. |
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8 ** |
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9 ** $QT_BEGIN_LICENSE:LGPL$ |
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10 ** No Commercial Usage |
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11 ** This file contains pre-release code and may not be distributed. |
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12 ** You may use this file in accordance with the terms and conditions |
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13 ** contained in the Technology Preview License Agreement accompanying |
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14 ** this package. |
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15 ** |
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16 ** GNU Lesser General Public License Usage |
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17 ** Alternatively, this file may be used under the terms of the GNU Lesser |
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18 ** General Public License version 2.1 as published by the Free Software |
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19 ** Foundation and appearing in the file LICENSE.LGPL included in the |
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20 ** packaging of this file. Please review the following information to |
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21 ** ensure the GNU Lesser General Public License version 2.1 requirements |
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22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. |
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23 ** |
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24 ** In addition, as a special exception, Nokia gives you certain additional |
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25 ** rights. These rights are described in the Nokia Qt LGPL Exception |
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26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. |
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27 ** |
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28 ** If you have questions regarding the use of this file, please contact |
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29 ** Nokia at qt-info@nokia.com. |
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30 ** |
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31 ** |
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32 ** |
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33 ** |
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34 ** |
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35 ** |
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36 ** |
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37 ** |
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38 ** $QT_END_LICENSE$ |
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39 ** |
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40 ****************************************************************************/ |
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41 |
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42 #include "qfontengine_p.h" |
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43 #include <private/qunicodetables_p.h> |
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44 #include <qwsdisplay_qws.h> |
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45 #include <qvarlengtharray.h> |
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46 #include <private/qpainter_p.h> |
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47 #include <private/qpaintengine_raster_p.h> |
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48 #include <private/qpdf_p.h> |
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49 #include "qtextengine_p.h" |
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50 #include "private/qcore_unix_p.h" // overrides QT_OPEN |
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51 |
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52 #include <qdebug.h> |
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53 |
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54 |
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55 #ifndef QT_NO_QWS_QPF |
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56 |
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57 #include "qfile.h" |
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58 #include "qdir.h" |
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59 |
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60 #define QT_USE_MMAP |
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61 #include <stdlib.h> |
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62 |
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63 #ifdef QT_USE_MMAP |
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64 // for mmap |
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65 #include <unistd.h> |
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66 #include <sys/types.h> |
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67 #include <sys/stat.h> |
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68 #include <sys/mman.h> |
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69 #include <fcntl.h> |
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70 #include <errno.h> |
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71 |
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72 # if defined(QT_LINUXBASE) && !defined(MAP_FILE) |
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73 // LSB 3.2 does not define MAP_FILE |
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74 # define MAP_FILE 0 |
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75 # endif |
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76 |
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77 #endif |
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78 |
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79 #endif // QT_NO_QWS_QPF |
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80 |
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81 QT_BEGIN_NAMESPACE |
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82 |
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83 #ifndef QT_NO_QWS_QPF |
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84 QT_BEGIN_INCLUDE_NAMESPACE |
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85 #include "qplatformdefs.h" |
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86 QT_END_INCLUDE_NAMESPACE |
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87 |
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88 static inline unsigned int getChar(const QChar *str, int &i, const int len) |
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89 { |
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90 unsigned int uc = str[i].unicode(); |
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91 if (uc >= 0xd800 && uc < 0xdc00 && i < len-1) { |
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92 uint low = str[i+1].unicode(); |
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93 if (low >= 0xdc00 && low < 0xe000) { |
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94 uc = (uc - 0xd800)*0x400 + (low - 0xdc00) + 0x10000; |
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95 ++i; |
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96 } |
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97 } |
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98 return uc; |
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99 } |
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100 |
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101 #define FM_SMOOTH 1 |
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102 |
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103 |
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104 class Q_PACKED QPFGlyphMetrics { |
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105 |
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106 public: |
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107 quint8 linestep; |
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108 quint8 width; |
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109 quint8 height; |
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110 quint8 flags; |
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111 |
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112 qint8 bearingx; // Difference from pen position to glyph's left bbox |
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113 quint8 advance; // Difference between pen positions |
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114 qint8 bearingy; // Used for putting characters on baseline |
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115 |
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116 qint8 reserved; // Do not use |
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117 |
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118 // Flags: |
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119 // RendererOwnsData - the renderer is responsible for glyph data |
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120 // memory deletion otherwise QPFGlyphTree must |
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121 // delete [] the data when the glyph is deleted. |
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122 enum Flags { RendererOwnsData=0x01 }; |
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123 }; |
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124 |
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125 class QPFGlyph { |
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126 public: |
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127 QPFGlyph() { metrics=0; data=0; } |
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128 QPFGlyph(QPFGlyphMetrics* m, uchar* d) : |
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129 metrics(m), data(d) { } |
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130 ~QPFGlyph() {} |
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131 |
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132 QPFGlyphMetrics* metrics; |
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133 uchar* data; |
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134 }; |
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135 |
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136 struct Q_PACKED QPFFontMetrics{ |
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137 qint8 ascent,descent; |
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138 qint8 leftbearing,rightbearing; |
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139 quint8 maxwidth; |
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140 qint8 leading; |
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141 quint8 flags; |
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142 quint8 underlinepos; |
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143 quint8 underlinewidth; |
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144 quint8 reserved3; |
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145 }; |
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146 |
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147 |
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148 class QPFGlyphTree { |
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149 public: |
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150 /* reads in a tree like this: |
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151 |
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152 A-Z |
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153 / \ |
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154 0-9 a-z |
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155 |
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156 etc. |
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157 |
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158 */ |
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159 glyph_t min,max; |
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160 QPFGlyphTree* less; |
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161 QPFGlyphTree* more; |
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162 QPFGlyph* glyph; |
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163 public: |
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164 #ifdef QT_USE_MMAP |
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165 QPFGlyphTree(uchar*& data) |
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166 { |
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167 read(data); |
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168 } |
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169 #else |
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170 QPFGlyphTree(QIODevice& f) |
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171 { |
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172 read(f); |
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173 } |
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174 #endif |
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175 |
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176 ~QPFGlyphTree() |
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177 { |
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178 // NOTE: does not delete glyph[*].metrics or .data. |
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179 // the caller does this (only they know who owns |
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180 // the data). See clear(). |
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181 delete less; |
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182 delete more; |
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183 delete [] glyph; |
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184 } |
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185 |
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186 bool inFont(glyph_t g) const |
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187 { |
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188 if ( g < min ) { |
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189 if ( !less ) |
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190 return false; |
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191 return less->inFont(g); |
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192 } else if ( g > max ) { |
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193 if ( !more ) |
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194 return false; |
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195 return more->inFont(g); |
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196 } |
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197 return true; |
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198 } |
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199 |
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200 QPFGlyph* get(glyph_t g) |
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201 { |
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202 if ( g < min ) { |
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203 if ( !less ) |
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204 return 0; |
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205 return less->get(g); |
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206 } else if ( g > max ) { |
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207 if ( !more ) |
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208 return 0; |
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209 return more->get(g); |
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210 } |
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211 return &glyph[g - min]; |
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212 } |
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213 int totalChars() const |
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214 { |
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215 if ( !this ) return 0; |
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216 return max-min+1 + less->totalChars() + more->totalChars(); |
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217 } |
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218 int weight() const |
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219 { |
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220 if ( !this ) return 0; |
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221 return 1 + less->weight() + more->weight(); |
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222 } |
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223 |
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224 void dump(int indent=0) |
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225 { |
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226 for (int i=0; i<indent; i++) printf(" "); |
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227 printf("%d..%d",min,max); |
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228 //if ( indent == 0 ) |
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229 printf(" (total %d)",totalChars()); |
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230 printf("\n"); |
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231 if ( less ) less->dump(indent+1); |
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232 if ( more ) more->dump(indent+1); |
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233 } |
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234 |
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235 private: |
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236 QPFGlyphTree() |
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237 { |
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238 } |
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239 |
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240 #ifdef QT_USE_MMAP |
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241 void read(uchar*& data) |
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242 { |
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243 // All node data first |
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244 readNode(data); |
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245 // Then all non-video data |
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246 readMetrics(data); |
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247 // Then all video data |
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248 readData(data); |
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249 } |
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250 #else |
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251 void read(QIODevice& f) |
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252 { |
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253 // All node data first |
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254 readNode(f); |
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255 // Then all non-video data |
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256 readMetrics(f); |
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257 // Then all video data |
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258 readData(f); |
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259 } |
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260 #endif |
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261 |
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262 #ifdef QT_USE_MMAP |
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263 void readNode(uchar*& data) |
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264 { |
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265 uchar rw = *data++; |
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266 uchar cl = *data++; |
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267 min = (rw << 8) | cl; |
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268 rw = *data++; |
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269 cl = *data++; |
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270 max = (rw << 8) | cl; |
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271 int flags = *data++; |
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272 if ( flags & 1 ) |
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273 less = new QPFGlyphTree; |
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274 else |
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275 less = 0; |
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276 if ( flags & 2 ) |
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277 more = new QPFGlyphTree; |
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278 else |
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279 more = 0; |
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280 int n = max-min+1; |
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281 glyph = new QPFGlyph[n]; |
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282 |
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283 if ( less ) |
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284 less->readNode(data); |
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285 if ( more ) |
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286 more->readNode(data); |
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287 } |
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288 #else |
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289 void readNode(QIODevice& f) |
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290 { |
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291 uchar rw = f.getch(); |
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292 uchar cl = f.getch(); |
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293 min = (rw << 8) | cl; |
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294 rw = f.getch(); |
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295 cl = f.getch(); |
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296 max = (rw << 8) | cl; |
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297 int flags = f.getch(); |
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298 if ( flags & 1 ) |
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299 less = new QPFGlyphTree; |
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300 else |
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301 less = 0; |
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302 if ( flags & 2 ) |
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303 more = new QPFGlyphTree; |
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304 else |
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305 more = 0; |
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306 int n = max-min+1; |
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307 glyph = new QPFGlyph[n]; |
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308 |
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309 if ( less ) |
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310 less->readNode(f); |
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311 if ( more ) |
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312 more->readNode(f); |
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313 } |
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314 #endif |
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315 |
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316 #ifdef QT_USE_MMAP |
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317 void readMetrics(uchar*& data) |
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318 { |
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319 int n = max-min+1; |
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320 for (int i=0; i<n; i++) { |
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321 glyph[i].metrics = (QPFGlyphMetrics*)data; |
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322 data += sizeof(QPFGlyphMetrics); |
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323 } |
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324 if ( less ) |
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325 less->readMetrics(data); |
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326 if ( more ) |
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327 more->readMetrics(data); |
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328 } |
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329 #else |
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330 void readMetrics(QIODevice& f) |
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331 { |
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332 int n = max-min+1; |
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333 for (int i=0; i<n; i++) { |
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334 glyph[i].metrics = new QPFGlyphMetrics; |
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335 f.readBlock((char*)glyph[i].metrics, sizeof(QPFGlyphMetrics)); |
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336 } |
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337 if ( less ) |
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338 less->readMetrics(f); |
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339 if ( more ) |
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340 more->readMetrics(f); |
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341 } |
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342 #endif |
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343 |
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344 #ifdef QT_USE_MMAP |
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345 void readData(uchar*& data) |
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346 { |
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347 int n = max-min+1; |
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348 for (int i=0; i<n; i++) { |
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349 QSize s( glyph[i].metrics->width, glyph[i].metrics->height ); |
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350 //######### s = qt_screen->mapToDevice( s ); |
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351 uint datasize = glyph[i].metrics->linestep * s.height(); |
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352 glyph[i].data = data; data += datasize; |
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353 } |
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354 if ( less ) |
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355 less->readData(data); |
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356 if ( more ) |
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357 more->readData(data); |
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358 } |
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359 #else |
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360 void readData(QIODevice& f) |
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361 { |
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362 int n = max-min+1; |
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363 for (int i=0; i<n; i++) { |
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364 QSize s( glyph[i].metrics->width, glyph[i].metrics->height ); |
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365 //############### s = qt_screen->mapToDevice( s ); |
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366 uint datasize = glyph[i].metrics->linestep * s.height(); |
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367 glyph[i].data = new uchar[datasize]; // ### deleted? |
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368 f.readBlock((char*)glyph[i].data, datasize); |
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369 } |
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370 if ( less ) |
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371 less->readData(f); |
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372 if ( more ) |
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373 more->readData(f); |
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374 } |
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375 #endif |
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376 |
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377 }; |
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378 |
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379 class QFontEngineQPF1Data |
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380 { |
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381 public: |
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382 QPFFontMetrics fm; |
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383 QPFGlyphTree *tree; |
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384 void *mmapStart; |
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385 size_t mmapLength; |
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386 }; |
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387 |
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388 |
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389 QFontEngineQPF1::QFontEngineQPF1(const QFontDef&, const QString &fn) |
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390 { |
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391 cache_cost = 1; |
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392 |
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393 int f = QT_OPEN( QFile::encodeName(fn), O_RDONLY, 0); |
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394 Q_ASSERT(f>=0); |
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395 QT_STATBUF st; |
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396 if ( QT_FSTAT( f, &st ) ) |
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397 qFatal("Failed to stat %s",QFile::encodeName(fn).data()); |
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398 uchar* data = (uchar*)mmap( 0, // any address |
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399 st.st_size, // whole file |
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400 PROT_READ, // read-only memory |
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401 #if !defined(Q_OS_SOLARIS) && !defined(Q_OS_QNX4) && !defined(Q_OS_INTEGRITY) && !defined(Q_OS_VXWORKS) |
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402 MAP_FILE | MAP_PRIVATE, // swap-backed map from file |
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403 #else |
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404 MAP_PRIVATE, |
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405 #endif |
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406 f, 0 ); // from offset 0 of f |
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407 #if defined(Q_OS_QNX4) && !defined(MAP_FAILED) |
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408 #define MAP_FAILED ((void *)-1) |
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409 #endif |
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410 if ( !data || data == (uchar*)MAP_FAILED ) |
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411 qFatal("Failed to mmap %s",QFile::encodeName(fn).data()); |
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412 QT_CLOSE(f); |
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413 |
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414 d = new QFontEngineQPF1Data; |
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415 d->mmapStart = data; |
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416 d->mmapLength = st.st_size; |
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417 memcpy(reinterpret_cast<char*>(&d->fm),data,sizeof(d->fm)); |
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418 |
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419 data += sizeof(d->fm); |
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420 d->tree = new QPFGlyphTree(data); |
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421 glyphFormat = (d->fm.flags & FM_SMOOTH) ? QFontEngineGlyphCache::Raster_A8 |
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422 : QFontEngineGlyphCache::Raster_Mono; |
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423 #if 0 |
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424 qDebug() << "font file" << fn |
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425 << "ascent" << d->fm.ascent << "descent" << d->fm.descent |
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426 << "leftbearing" << d->fm.leftbearing |
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427 << "rightbearing" << d->fm.rightbearing |
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428 << "maxwidth" << d->fm.maxwidth |
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429 << "leading" << d->fm.leading |
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430 << "flags" << d->fm.flags |
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431 << "underlinepos" << d->fm.underlinepos |
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432 << "underlinewidth" << d->fm.underlinewidth; |
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433 #endif |
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434 } |
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435 |
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436 QFontEngineQPF1::~QFontEngineQPF1() |
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437 { |
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438 if (d->mmapStart) |
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439 munmap(d->mmapStart, d->mmapLength); |
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440 delete d->tree; |
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441 delete d; |
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442 } |
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443 |
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444 |
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445 bool QFontEngineQPF1::stringToCMap(const QChar *str, int len, QGlyphLayout *glyphs, int *nglyphs, QTextEngine::ShaperFlags flags) const |
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446 { |
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447 if(*nglyphs < len) { |
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448 *nglyphs = len; |
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449 return false; |
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450 } |
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451 *nglyphs = 0; |
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452 |
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453 bool mirrored = flags & QTextEngine::RightToLeft; |
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454 for(int i = 0; i < len; i++) { |
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455 unsigned int uc = getChar(str, i, len); |
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456 if (mirrored) |
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457 uc = QChar::mirroredChar(uc); |
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458 glyphs->glyphs[*nglyphs] = uc < 0x10000 ? uc : 0; |
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459 ++*nglyphs; |
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460 } |
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461 |
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462 glyphs->numGlyphs = *nglyphs; |
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463 |
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464 if (flags & QTextEngine::GlyphIndicesOnly) |
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465 return true; |
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466 |
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467 recalcAdvances(glyphs, flags); |
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468 |
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469 return true; |
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470 } |
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471 |
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472 void QFontEngineQPF1::recalcAdvances(QGlyphLayout *glyphs, QTextEngine::ShaperFlags) const |
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473 { |
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474 for(int i = 0; i < glyphs->numGlyphs; i++) { |
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475 QPFGlyph *glyph = d->tree->get(glyphs->glyphs[i]); |
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476 |
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477 glyphs->advances_x[i] = glyph ? glyph->metrics->advance : 0; |
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478 glyphs->advances_y[i] = 0; |
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479 |
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480 if (!glyph) |
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481 glyphs->glyphs[i] = 0; |
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482 } |
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483 } |
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484 |
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485 void QFontEngineQPF1::draw(QPaintEngine *p, qreal _x, qreal _y, const QTextItemInt &si) |
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486 { |
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487 QPaintEngineState *pState = p->state; |
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488 QRasterPaintEngine *paintEngine = static_cast<QRasterPaintEngine*>(p); |
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489 |
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490 QTransform matrix = pState->transform(); |
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491 matrix.translate(_x, _y); |
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492 QFixed x = QFixed::fromReal(matrix.dx()); |
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493 QFixed y = QFixed::fromReal(matrix.dy()); |
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494 |
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495 QVarLengthArray<QFixedPoint> positions; |
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496 QVarLengthArray<glyph_t> glyphs; |
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497 getGlyphPositions(si.glyphs, matrix, si.flags, glyphs, positions); |
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498 if (glyphs.size() == 0) |
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499 return; |
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500 |
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501 int depth = (d->fm.flags & FM_SMOOTH) ? 8 : 1; |
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502 for(int i = 0; i < glyphs.size(); i++) { |
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503 const QPFGlyph *glyph = d->tree->get(glyphs[i]); |
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504 if (!glyph) |
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505 continue; |
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506 |
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507 int bpl = glyph->metrics->linestep; |
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508 |
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509 if(glyph->data) |
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510 paintEngine->alphaPenBlt(glyph->data, bpl, depth, |
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511 qRound(positions[i].x) + glyph->metrics->bearingx, |
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512 qRound(positions[i].y) - glyph->metrics->bearingy, |
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513 glyph->metrics->width,glyph->metrics->height); |
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514 } |
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515 } |
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516 |
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517 |
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518 QImage QFontEngineQPF1::alphaMapForGlyph(glyph_t g) |
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519 { |
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520 const QPFGlyph *glyph = d->tree->get(g); |
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521 if (!glyph) |
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522 return QImage(); |
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523 |
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524 int mono = !(d->fm.flags & FM_SMOOTH); |
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525 |
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526 const uchar *bits = glyph->data;//((const uchar *) glyph); |
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527 |
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528 QImage image; |
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529 if (mono) { |
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530 image = QImage((glyph->metrics->width+7)&~7, glyph->metrics->height, QImage::Format_Mono); |
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531 image.setColor(0, qRgba(0, 0, 0, 0)); |
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532 image.setColor(1, qRgba(0, 0, 0, 255)); |
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533 } else { |
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534 image = QImage(glyph->metrics->width, glyph->metrics->height, QImage::Format_Indexed8); |
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535 for (int j=0; j<256; ++j) |
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536 image.setColor(j, qRgba(0, 0, 0, j)); |
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537 } |
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538 for (int i=0; i<glyph->metrics->height; ++i) { |
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539 memcpy(image.scanLine(i), bits, glyph->metrics->linestep); |
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540 bits += glyph->metrics->linestep; |
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541 } |
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542 return image; |
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543 } |
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544 |
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545 |
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546 |
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547 void QFontEngineQPF1::addOutlineToPath(qreal x, qreal y, const QGlyphLayout &glyphs, QPainterPath *path, QTextItem::RenderFlags flags) |
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548 { |
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549 addBitmapFontToPath(x, y, glyphs, path, flags); |
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550 } |
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551 |
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552 glyph_metrics_t QFontEngineQPF1::boundingBox(const QGlyphLayout &glyphs) |
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553 { |
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554 if (glyphs.numGlyphs == 0) |
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555 return glyph_metrics_t(); |
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556 |
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557 QFixed w = 0; |
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558 for (int i = 0; i < glyphs.numGlyphs; ++i) |
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559 w += glyphs.effectiveAdvance(i); |
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560 return glyph_metrics_t(0, -ascent(), w, ascent()+descent()+1, w, 0); |
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561 } |
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562 |
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563 glyph_metrics_t QFontEngineQPF1::boundingBox(glyph_t glyph) |
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564 { |
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565 const QPFGlyph *g = d->tree->get(glyph); |
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566 if (!g) |
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567 return glyph_metrics_t(); |
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568 Q_ASSERT(g); |
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569 return glyph_metrics_t(g->metrics->bearingx, -g->metrics->bearingy, |
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570 g->metrics->width, g->metrics->height, |
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571 g->metrics->advance, 0); |
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572 } |
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573 |
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574 QFixed QFontEngineQPF1::ascent() const |
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575 { |
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576 return d->fm.ascent; |
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577 } |
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578 |
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579 QFixed QFontEngineQPF1::descent() const |
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580 { |
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581 return d->fm.descent; |
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582 } |
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583 |
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584 QFixed QFontEngineQPF1::leading() const |
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585 { |
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586 return d->fm.leading; |
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587 } |
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588 |
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589 qreal QFontEngineQPF1::maxCharWidth() const |
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590 { |
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591 return d->fm.maxwidth; |
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592 } |
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593 /* |
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594 const char *QFontEngineQPF1::name() const |
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595 { |
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596 return "qt"; |
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597 } |
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598 */ |
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599 bool QFontEngineQPF1::canRender(const QChar *str, int len) |
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600 { |
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601 for(int i = 0; i < len; i++) |
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602 if (!d->tree->inFont(str[i].unicode())) |
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603 return false; |
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604 return true; |
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605 } |
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606 |
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607 QFontEngine::Type QFontEngineQPF1::type() const |
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608 { |
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609 return QPF1; |
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610 } |
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611 |
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612 qreal QFontEngineQPF1::minLeftBearing() const |
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613 { |
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614 return d->fm.leftbearing; |
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615 } |
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616 |
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617 qreal QFontEngineQPF1::minRightBearing() const |
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618 { |
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619 return d->fm.rightbearing; |
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620 } |
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621 |
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622 QFixed QFontEngineQPF1::underlinePosition() const |
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623 { |
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624 return d->fm.underlinepos; |
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625 } |
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626 |
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627 QFixed QFontEngineQPF1::lineThickness() const |
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628 { |
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629 return d->fm.underlinewidth; |
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630 } |
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631 |
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632 #endif //QT_NO_QWS_QPF |
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633 |
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634 QT_END_NAMESPACE |