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These rights are described in The Qt Company LGPL Exception 28 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. 29 ** 30 ** GNU General Public License Usage 31 ** Alternatively, this file may be used under the terms of the GNU 32 ** General Public License version 3.0 as published by the Free Software 33 ** Foundation and appearing in the file LICENSE.GPL included in the 34 ** packaging of this file. Please review the following information to 35 ** ensure the GNU General Public License version 3.0 requirements will be 36 ** met: http://www.gnu.org/copyleft/gpl.html. 37 ** 38 ** $QT_END_LICENSE$ 39 ** 40 ****************************************************************************/ 41 42 #ifndef QFONTENGINE_QPF_P_H 43 #define QFONTENGINE_QPF_P_H 44 45 // 46 // W A R N I N G 47 // ------------- 48 // 49 // This file is not part of the Qt API. It exists purely as an 50 // implementation detail. This header file may change from version to 51 // version without notice, or even be removed. 52 // 53 // We mean it. 54 // 55 56 #include "qfontengine_p.h" 57 #include <qendian.h> 58 #include <qbuffer.h> 59 60 #ifndef QT_NO_QWS_QPF2 61 #if !defined(QT_NO_FREETYPE) 62 # include "qfontengine_ft_p.h" 63 #endif 64 #endif 65 66 QT_BEGIN_NAMESPACE 67 68 #ifndef QT_NO_QWS_QPF2 69 70 class QFontEngine; 71 class QFreetypeFace; 72 73 class Q_GUI_EXPORT QFontEngineQPF : public QFontEngine 74 { 75 public: 76 // if you add new tags please make sure to update the tables in 77 // qpfutil.cpp and tools/makeqpf/qpf2.cpp 78 enum HeaderTag { 79 Tag_FontName, // 0 string 80 Tag_FileName, // 1 string 81 Tag_FileIndex, // 2 quint32 82 Tag_FontRevision, // 3 quint32 83 Tag_FreeText, // 4 string 84 Tag_Ascent, // 5 QFixed 85 Tag_Descent, // 6 QFixed 86 Tag_Leading, // 7 QFixed 87 Tag_XHeight, // 8 QFixed 88 Tag_AverageCharWidth, // 9 QFixed 89 Tag_MaxCharWidth, // 10 QFixed 90 Tag_LineThickness, // 11 QFixed 91 Tag_MinLeftBearing, // 12 QFixed 92 Tag_MinRightBearing, // 13 QFixed 93 Tag_UnderlinePosition, // 14 QFixed 94 Tag_GlyphFormat, // 15 quint8 95 Tag_PixelSize, // 16 quint8 96 Tag_Weight, // 17 quint8 97 Tag_Style, // 18 quint8 98 Tag_EndOfHeader, // 19 string 99 Tag_WritingSystems, // 20 bitfield 100 101 NumTags 102 }; 103 104 enum TagType { 105 StringType, 106 FixedType, 107 UInt8Type, 108 UInt32Type, 109 BitFieldType 110 }; 111 112 struct Tag 113 { 114 quint16 tag; 115 quint16 size; 116 }; 117 118 enum GlyphFormat { 119 BitmapGlyphs = 1, 120 AlphamapGlyphs = 8 121 }; 122 123 enum { 124 CurrentMajorVersion = 2, 125 CurrentMinorVersion = 0 126 }; 127 128 // The CMap is identical to the TrueType CMap table format 129 // The GMap table is a normal array with the total number of 130 // covered glyphs in the TrueType font 131 enum BlockTag { 132 CMapBlock, 133 GMapBlock, 134 GlyphBlock 135 }; 136 137 struct Q_PACKED Header 138 { 139 char magic[4]; // 'QPF2' 140 quint32 lock; // values: 0 = unlocked, 0xffffffff = read-only, otherwise qws client id of locking process 141 quint8 majorVersion; 142 quint8 minorVersion; 143 quint16 dataSize; 144 }; 145 146 struct Q_PACKED Block 147 { 148 quint16 tag; 149 quint16 pad; 150 quint32 dataSize; 151 }; 152 153 struct Q_PACKED Glyph 154 { 155 quint8 width; 156 quint8 height; 157 quint8 bytesPerLine; 158 qint8 x; 159 qint8 y; 160 qint8 advance; 161 }; 162 163 #ifdef QT_FONTS_ARE_RESOURCES 164 QFontEngineQPF(const QFontDef &def, const uchar *bytes, int size); 165 #else 166 QFontEngineQPF(const QFontDef &def, int fd, QFontEngine *renderingFontEngine = 0); 167 #endif 168 ~QFontEngineQPF(); 169 faceId()170 FaceId faceId() const { return face_id; } 171 bool getSfntTableData(uint tag, uchar *buffer, uint *length) const; 172 173 bool stringToCMap(const QChar *str, int len, QGlyphLayout *glyphs, int *nglyphs, QTextEngine::ShaperFlags flags) const; 174 void recalcAdvances(QGlyphLayout *, QTextEngine::ShaperFlags) const; 175 176 void draw(QPaintEngine *p, qreal x, qreal y, const QTextItemInt &si); 177 void addOutlineToPath(qreal x, qreal y, const QGlyphLayout &glyphs, QPainterPath *path, QTextItem::RenderFlags flags); 178 QImage alphaMapForGlyph(glyph_t t); 179 180 glyph_metrics_t boundingBox(const QGlyphLayout &glyphs); 181 glyph_metrics_t boundingBox(glyph_t glyph); 182 183 QFixed ascent() const; 184 QFixed descent() const; 185 QFixed leading() const; 186 qreal maxCharWidth() const; 187 qreal minLeftBearing() const; 188 qreal minRightBearing() const; 189 QFixed underlinePosition() const; 190 QFixed lineThickness() const; 191 192 Type type() const; 193 194 bool canRender(const QChar *string, int len); name()195 inline const char *name() const { return "QPF2"; } 196 glyphCount()197 virtual int glyphCount() const { return glyphMapEntries; } 198 199 bool isValid() const; 200 201 const Glyph *findGlyph(glyph_t g) const; 202 203 static bool verifyHeader(const uchar *data, int size); 204 static QVariant extractHeaderField(const uchar *data, HeaderTag tag); 205 static QList<QByteArray> cleanUpAfterClientCrash(const QList<int> &crashedClientIds); 206 207 #if !defined(QT_NO_FREETYPE) 208 FT_Face lockFace() const; 209 void unlockFace() const; 210 void doKerning(QGlyphLayout *g, QTextEngine::ShaperFlags flags) const; 211 virtual HB_Error getPointInOutline(HB_Glyph glyph, int flags, hb_uint32 point, HB_Fixed *xpos, HB_Fixed *ypos, hb_uint32 *nPoints); 212 virtual QFixed emSquareSize() const; 213 #endif 214 fontFile()215 inline QString fontFile() const { return fileName; } 216 renderingEngine()217 QFontEngine *renderingEngine() const { return renderingFontEngine; } 218 takeRenderingEngine()219 QFontEngine *takeRenderingEngine() 220 { 221 QFontEngine *engine = renderingFontEngine; 222 renderingFontEngine = 0; 223 return engine; 224 } 225 226 private: 227 #if !defined(QT_NO_FREETYPE) 228 void ensureGlyphsLoaded(const QGlyphLayout &glyphs); 229 void loadGlyph(glyph_t glyph); 230 bool lockFile(); 231 void unlockFile(); 232 void remapFontData(); 233 #endif 234 235 int fd; 236 const uchar *fontData; 237 int dataSize; 238 const uchar *externalCMap; 239 quint32 cmapOffset; 240 int cmapSize; 241 quint32 glyphMapOffset; 242 quint32 glyphMapEntries; 243 quint32 glyphDataOffset; 244 quint32 glyphDataSize; 245 QString fileName; 246 QByteArray encodedFileName; 247 bool readOnly; 248 249 QFreetypeFace *freetype; 250 FaceId face_id; 251 QByteArray freetypeCMapTable; 252 mutable bool kerning_pairs_loaded; 253 QFontEngine *renderingFontEngine; 254 }; 255 256 struct QPFGenerator 257 { QPFGeneratorQPFGenerator258 QPFGenerator(QBuffer *device, QFontEngine *engine) 259 : dev(device), fe(engine) {} 260 261 void generate(); 262 void writeHeader(); 263 void writeGMap(); 264 void writeBlock(QFontEngineQPF::BlockTag tag, const QByteArray &data); 265 266 void writeTaggedString(QFontEngineQPF::HeaderTag tag, const QByteArray &string); 267 void writeTaggedUInt32(QFontEngineQPF::HeaderTag tag, quint32 value); 268 void writeTaggedUInt8(QFontEngineQPF::HeaderTag tag, quint8 value); 269 void writeTaggedQFixed(QFontEngineQPF::HeaderTag tag, QFixed value); 270 writeUInt16QPFGenerator271 void writeUInt16(quint16 value) { value = qToBigEndian(value); dev->write((const char *)&value, sizeof(value)); } writeUInt32QPFGenerator272 void writeUInt32(quint32 value) { value = qToBigEndian(value); dev->write((const char *)&value, sizeof(value)); } writeUInt8QPFGenerator273 void writeUInt8(quint8 value) { dev->write((const char *)&value, sizeof(value)); } writeInt8QPFGenerator274 void writeInt8(qint8 value) { dev->write((const char *)&value, sizeof(value)); } 275 align4QPFGenerator276 void align4() { while (dev->pos() & 3) { dev->putChar('\0'); } } 277 278 QBuffer *dev; 279 QFontEngine *fe; 280 }; 281 282 #endif // QT_NO_QWS_QPF2 283 284 class QFontEngineMultiQWS : public QFontEngineMulti 285 { 286 public: 287 QFontEngineMultiQWS(QFontEngine *fe, int script, const QStringList &fallbacks); 288 289 void loadEngine(int at); 290 void draw(QPaintEngine *p, qreal x, qreal y, const QTextItemInt &si); 291 292 private: 293 QStringList fallbackFamilies; 294 int script; 295 }; 296 297 QT_END_NAMESPACE 298 299 #endif // QFONTENGINE_QPF_P_H 300