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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 #ifndef QFONTENGINE_QPF_P_H |
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43 #define QFONTENGINE_QPF_P_H |
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44 |
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45 // |
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46 // W A R N I N G |
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47 // ------------- |
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48 // |
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49 // This file is not part of the Qt API. It exists purely as an |
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50 // implementation detail. This header file may change from version to |
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51 // version without notice, or even be removed. |
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52 // |
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53 // We mean it. |
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54 // |
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55 |
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56 #include "qfontengine_p.h" |
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57 #include <qendian.h> |
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58 #include <qbuffer.h> |
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59 |
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60 #ifndef QT_NO_QWS_QPF2 |
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61 #if !defined(QT_NO_FREETYPE) |
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62 # include "qfontengine_ft_p.h" |
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63 #endif |
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64 #endif |
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65 |
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66 QT_BEGIN_NAMESPACE |
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67 |
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68 #ifndef QT_NO_QWS_QPF2 |
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69 |
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70 class QFontEngine; |
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71 class QFreetypeFace; |
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72 |
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73 class Q_GUI_EXPORT QFontEngineQPF : public QFontEngine |
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74 { |
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75 public: |
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76 // if you add new tags please make sure to update the tables in |
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77 // qpfutil.cpp and tools/makeqpf/qpf2.cpp |
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78 enum HeaderTag { |
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79 Tag_FontName, // 0 string |
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80 Tag_FileName, // 1 string |
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81 Tag_FileIndex, // 2 quint32 |
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82 Tag_FontRevision, // 3 quint32 |
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83 Tag_FreeText, // 4 string |
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84 Tag_Ascent, // 5 QFixed |
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85 Tag_Descent, // 6 QFixed |
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86 Tag_Leading, // 7 QFixed |
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87 Tag_XHeight, // 8 QFixed |
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88 Tag_AverageCharWidth, // 9 QFixed |
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89 Tag_MaxCharWidth, // 10 QFixed |
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90 Tag_LineThickness, // 11 QFixed |
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91 Tag_MinLeftBearing, // 12 QFixed |
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92 Tag_MinRightBearing, // 13 QFixed |
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93 Tag_UnderlinePosition, // 14 QFixed |
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94 Tag_GlyphFormat, // 15 quint8 |
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95 Tag_PixelSize, // 16 quint8 |
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96 Tag_Weight, // 17 quint8 |
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97 Tag_Style, // 18 quint8 |
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98 Tag_EndOfHeader, // 19 string |
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99 Tag_WritingSystems, // 20 bitfield |
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100 |
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101 NumTags |
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102 }; |
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103 |
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104 enum TagType { |
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105 StringType, |
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106 FixedType, |
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107 UInt8Type, |
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108 UInt32Type, |
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109 BitFieldType |
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110 }; |
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111 |
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112 struct Tag |
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113 { |
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114 quint16 tag; |
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115 quint16 size; |
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116 }; |
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117 |
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118 enum GlyphFormat { |
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119 BitmapGlyphs = 1, |
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120 AlphamapGlyphs = 8 |
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121 }; |
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122 |
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123 enum { |
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124 CurrentMajorVersion = 2, |
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125 CurrentMinorVersion = 0 |
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126 }; |
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127 |
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128 // The CMap is identical to the TrueType CMap table format |
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129 // The GMap table is a normal array with the total number of |
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130 // covered glyphs in the TrueType font |
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131 enum BlockTag { |
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132 CMapBlock, |
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133 GMapBlock, |
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134 GlyphBlock |
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135 }; |
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136 |
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137 struct Q_PACKED Header |
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138 { |
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139 char magic[4]; // 'QPF2' |
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140 quint32 lock; // values: 0 = unlocked, 0xffffffff = read-only, otherwise qws client id of locking process |
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141 quint8 majorVersion; |
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142 quint8 minorVersion; |
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143 quint16 dataSize; |
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144 }; |
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145 |
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146 struct Q_PACKED Block |
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147 { |
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148 quint16 tag; |
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149 quint16 pad; |
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150 quint32 dataSize; |
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151 }; |
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152 |
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153 struct Q_PACKED Glyph |
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154 { |
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155 quint8 width; |
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156 quint8 height; |
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157 quint8 bytesPerLine; |
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158 qint8 x; |
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159 qint8 y; |
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160 qint8 advance; |
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161 }; |
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162 |
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163 #ifdef QT_FONTS_ARE_RESOURCES |
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164 QFontEngineQPF(const QFontDef &def, const uchar *bytes, int size); |
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165 #else |
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166 QFontEngineQPF(const QFontDef &def, int fd, QFontEngine *renderingFontEngine = 0); |
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167 #endif |
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168 ~QFontEngineQPF(); |
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169 |
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170 FaceId faceId() const { return face_id; } |
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171 bool getSfntTableData(uint tag, uchar *buffer, uint *length) const; |
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172 |
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173 bool stringToCMap(const QChar *str, int len, QGlyphLayout *glyphs, int *nglyphs, QTextEngine::ShaperFlags flags) const; |
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174 void recalcAdvances(QGlyphLayout *, QTextEngine::ShaperFlags) const; |
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175 |
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176 void draw(QPaintEngine *p, qreal x, qreal y, const QTextItemInt &si); |
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177 void addOutlineToPath(qreal x, qreal y, const QGlyphLayout &glyphs, QPainterPath *path, QTextItem::RenderFlags flags); |
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178 QImage alphaMapForGlyph(glyph_t t); |
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179 |
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180 glyph_metrics_t boundingBox(const QGlyphLayout &glyphs); |
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181 glyph_metrics_t boundingBox(glyph_t glyph); |
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182 |
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183 QFixed ascent() const; |
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184 QFixed descent() const; |
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185 QFixed leading() const; |
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186 qreal maxCharWidth() const; |
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187 qreal minLeftBearing() const; |
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188 qreal minRightBearing() const; |
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189 QFixed underlinePosition() const; |
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190 QFixed lineThickness() const; |
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191 |
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192 Type type() const; |
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193 |
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194 bool canRender(const QChar *string, int len); |
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195 inline const char *name() const { return "QPF2"; } |
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196 |
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197 virtual int glyphCount() const { return glyphMapEntries; } |
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198 |
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199 bool isValid() const; |
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200 |
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201 const Glyph *findGlyph(glyph_t g) const; |
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202 |
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203 static bool verifyHeader(const uchar *data, int size); |
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204 static QVariant extractHeaderField(const uchar *data, HeaderTag tag); |
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205 static QList<QByteArray> cleanUpAfterClientCrash(const QList<int> &crashedClientIds); |
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206 |
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207 #if !defined(QT_NO_FREETYPE) |
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208 FT_Face lockFace() const; |
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209 void unlockFace() const; |
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210 void doKerning(QGlyphLayout *g, QTextEngine::ShaperFlags flags) const; |
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211 virtual HB_Error getPointInOutline(HB_Glyph glyph, int flags, hb_uint32 point, HB_Fixed *xpos, HB_Fixed *ypos, hb_uint32 *nPoints); |
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212 virtual QFixed emSquareSize() const; |
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213 #endif |
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214 |
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215 inline QString fontFile() const { return fileName; } |
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216 |
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217 QFontEngine *renderingEngine() const { return renderingFontEngine; } |
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218 |
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219 QFontEngine *takeRenderingEngine() |
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220 { |
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221 QFontEngine *engine = renderingFontEngine; |
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222 renderingFontEngine = 0; |
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223 return engine; |
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224 } |
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225 |
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226 private: |
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227 #if !defined(QT_NO_FREETYPE) |
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228 void ensureGlyphsLoaded(const QGlyphLayout &glyphs); |
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229 void loadGlyph(glyph_t glyph); |
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230 bool lockFile(); |
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231 void unlockFile(); |
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232 void remapFontData(); |
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233 #endif |
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234 |
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235 int fd; |
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236 const uchar *fontData; |
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237 int dataSize; |
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238 const uchar *externalCMap; |
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239 quint32 cmapOffset; |
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240 int cmapSize; |
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241 quint32 glyphMapOffset; |
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242 quint32 glyphMapEntries; |
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243 quint32 glyphDataOffset; |
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244 quint32 glyphDataSize; |
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245 QString fileName; |
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246 QByteArray encodedFileName; |
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247 bool readOnly; |
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248 |
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249 QFreetypeFace *freetype; |
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250 FaceId face_id; |
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251 QByteArray freetypeCMapTable; |
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252 mutable bool kerning_pairs_loaded; |
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253 QFontEngine *renderingFontEngine; |
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254 }; |
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255 |
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256 struct QPFGenerator |
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257 { |
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258 QPFGenerator(QBuffer *device, QFontEngine *engine) |
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259 : dev(device), fe(engine) {} |
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260 |
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261 void generate(); |
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262 void writeHeader(); |
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263 void writeGMap(); |
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264 void writeBlock(QFontEngineQPF::BlockTag tag, const QByteArray &data); |
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265 |
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266 void writeTaggedString(QFontEngineQPF::HeaderTag tag, const QByteArray &string); |
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267 void writeTaggedUInt32(QFontEngineQPF::HeaderTag tag, quint32 value); |
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268 void writeTaggedUInt8(QFontEngineQPF::HeaderTag tag, quint8 value); |
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269 void writeTaggedQFixed(QFontEngineQPF::HeaderTag tag, QFixed value); |
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270 |
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271 void writeUInt16(quint16 value) { value = qToBigEndian(value); dev->write((const char *)&value, sizeof(value)); } |
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272 void writeUInt32(quint32 value) { value = qToBigEndian(value); dev->write((const char *)&value, sizeof(value)); } |
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273 void writeUInt8(quint8 value) { dev->write((const char *)&value, sizeof(value)); } |
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274 void writeInt8(qint8 value) { dev->write((const char *)&value, sizeof(value)); } |
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275 |
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276 void align4() { while (dev->pos() & 3) { dev->putChar('\0'); } } |
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277 |
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278 QBuffer *dev; |
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279 QFontEngine *fe; |
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280 }; |
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281 |
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282 #endif // QT_NO_QWS_QPF2 |
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283 |
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284 class QFontEngineMultiQWS : public QFontEngineMulti |
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285 { |
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286 public: |
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287 QFontEngineMultiQWS(QFontEngine *fe, int script, const QStringList &fallbacks); |
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288 |
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289 void loadEngine(int at); |
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290 void draw(QPaintEngine *p, qreal x, qreal y, const QTextItemInt &si); |
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291 |
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292 private: |
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293 QStringList fallbackFamilies; |
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294 int script; |
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295 }; |
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296 |
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297 QT_END_NAMESPACE |
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298 |
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299 #endif // QFONTENGINE_QPF_P_H |