qtextengine.cpp File Reference

#include "qdebug.h"
#include "qtextformat.h"
#include "qtextformat_p.h"
#include "qtextengine_p.h"
#include "qabstracttextdocumentlayout.h"
#include "qtextlayout.h"
#include "qtextboundaryfinder.h"
#include "qvarlengtharray.h"
#include "qfont.h"
#include "qfont_p.h"
#include "qfontengine_p.h"
#include "qstring.h"
#include <private/qunicodetables_p.h>
#include "qtextdocument_p.h"
#include <qapplication.h>
#include <stdlib.h>
#include "qfontengine_ft_p.h"
#include <private/qharfbuzz_p.h>

Go to the source code of this file.

Classes
struct	QBidiControl
struct	QBidiStatus
struct	QJustificationPoint

Macros
#define	BIDI_DEBUG   0

Enumerations
enum	{ MaxBidiLevel = 61 }

Functions
static void	appendItems (QScriptAnalysis *analysis, int &start, int &stop, const QBidiControl &control, QChar::Direction dir)
static bool	bidiItemize (QTextEngine *engine, QScriptAnalysis *analysis, QBidiControl &control)
static bool	enableHarfBuzz ()
static bool	hasCaseChange (const QScriptItem &si)
static void	heuristicSetGlyphAttributes (const QChar *uc, int length, QGlyphLayout *glyphs, unsigned short *logClusters, int num_glyphs)
static void	init (QTextEngine *e)
static void	moveGlyphData (const QGlyphLayout &destination, const QGlyphLayout &source, int num)
static bool	nextCharJoins (const QString &string, int pos)
static bool	prevCharJoins (const QString &string, int pos)
	Q_DECLARE_TYPEINFO (QJustificationPoint, Q_PRIMITIVE_TYPE)
QTransform	qt_true_matrix (qreal w, qreal h, QTransform x)
static void	releaseCachedFontEngine (QFontEngine *fontEngine)
static void	set (QJustificationPoint *point, int type, const QGlyphLayout &glyph, QFontEngine *fe)
static QChar::Direction	skipBoundryNeutrals (QScriptAnalysis *analysis, const ushort *unicode, int length, int &sor, int &eor, QBidiControl &control)
static bool	stringToGlyphs (HB_ShaperItem *item, QGlyphLayout *glyphs, QFontEngine *fontEngine)

Macro Definition Documentation

BIDI_DEBUG

#define BIDI_DEBUG   0

Definition at line 227 of file qtextengine.cpp.

Enumeration Type Documentation

anonymous enum

anonymous enum

Enumerator
MaxBidiLevel

Definition at line 254 of file qtextengine.cpp.

{ MaxBidiLevel = 61 };

Function Documentation

appendItems()

static void appendItems ( QScriptAnalysis *  analysis, int &  start, int &  stop, const QBidiControl &  control, QChar::Direction  dir  )

static

Definition at line 302 of file qtextengine.cpp.

Referenced by bidiItemize().

{
    if (start > stop)
        return;

    int level = control.level;

    if(dir != QChar::DirON && !control.override) {
        // add level of run (cases I1 & I2)
        if(level % 2) {
            if(dir == QChar::DirL || dir == QChar::DirAN || dir == QChar::DirEN)
                level++;
        } else {
            if(dir == QChar::DirR)
                level++;
            else if(dir == QChar::DirAN || dir == QChar::DirEN)
                level += 2;
        }
    }

#if (BIDI_DEBUG >= 1)
    qDebug("new run: dir=%s from %d, to %d level = %d override=%d", directions[dir], start, stop, level, control.override);
#endif
    QScriptAnalysis *s = analysis + start;
    const QScriptAnalysis *e = analysis + stop;
    while (s <= e) {
        s->bidiLevel = level;
        ++s;
    }
    ++stop;
    start = stop;
}

bidiItemize()

static bool bidiItemize ( QTextEngine *  engine, QScriptAnalysis *  analysis, QBidiControl &  control  )

static

Definition at line 357 of file qtextengine.cpp.

Referenced by QTextEngine::itemize().

{
    bool rightToLeft = (control.basicDirection() == 1);
    bool hasBidi = rightToLeft;
#if BIDI_DEBUG >= 2
    qDebug() << "bidiItemize: rightToLeft=" << rightToLeft << engine->layoutData->string;
#endif

    int sor = 0;
    int eor = -1;


    int length = engine->layoutData->string.length();

    const ushort *unicode = (const ushort *)engine->layoutData->string.unicode();
    int current = 0;

    QChar::Direction dir = rightToLeft ? QChar::DirR : QChar::DirL;
    QBidiStatus status;

    QChar::Direction sdir = QChar::direction(*unicode);
    if (sdir != QChar::DirL && sdir != QChar::DirR && sdir != QChar::DirEN && sdir != QChar::DirAN)
        sdir = QChar::DirON;
    else
        dir = QChar::DirON;
    status.eor = sdir;
    status.lastStrong = rightToLeft ? QChar::DirR : QChar::DirL;
    status.last = status.lastStrong;
    status.dir = sdir;


    while (current <= length) {

        QChar::Direction dirCurrent;
        if (current == (int)length)
            dirCurrent = control.basicDirection();
        else
            dirCurrent = QChar::direction(unicode[current]);

#if (BIDI_DEBUG >= 2)
//         qDebug() << "pos=" << current << " dir=" << directions[dir]
//                  << " current=" << directions[dirCurrent] << " last=" << directions[status.last]
//                  << " eor=" << eor << '/' << directions[status.eor]
//                  << " sor=" << sor << " lastStrong="
//                  << directions[status.lastStrong]
//                  << " level=" << (int)control.level << " override=" << (bool)control.override;
#endif

        switch(dirCurrent) {

            // embedding and overrides (X1-X9 in the BiDi specs)
        case QChar::DirRLE:
        case QChar::DirRLO:
        case QChar::DirLRE:
        case QChar::DirLRO:
            {
                bool rtl = (dirCurrent == QChar::DirRLE || dirCurrent == QChar::DirRLO);
                hasBidi |= rtl;
                bool override = (dirCurrent == QChar::DirLRO || dirCurrent == QChar::DirRLO);

                unsigned int level = control.level+1;
                if ((level%2 != 0) == rtl) ++level;
                if(level < MaxBidiLevel) {
                    eor = current-1;
                    appendItems(analysis, sor, eor, control, dir);
                    eor = current;
                    control.embed(rtl, override);
                    QChar::Direction edir = (rtl ? QChar::DirR : QChar::DirL);
                    dir = status.eor = edir;
                    status.lastStrong = edir;
                }
                break;
            }
        case QChar::DirPDF:
            {
                if (control.canPop()) {
                    if (dir != control.direction()) {
                        eor = current-1;
                        appendItems(analysis, sor, eor, control, dir);
                        dir = control.direction();
                    }
                    eor = current;
                    appendItems(analysis, sor, eor, control, dir);
                    control.pdf();
                    dir = QChar::DirON; status.eor = QChar::DirON;
                    status.last = control.direction();
                    if (control.override)
                        dir = control.direction();
                    else
                        dir = QChar::DirON;
                    status.lastStrong = control.direction();
                }
                break;
            }

            // strong types
        case QChar::DirL:
            if(dir == QChar::DirON)
                dir = QChar::DirL;
            switch(status.last)
                {
                case QChar::DirL:
                    eor = current; status.eor = QChar::DirL; break;
                case QChar::DirR:
                case QChar::DirAL:
                case QChar::DirEN:
                case QChar::DirAN:
                    if (eor >= 0) {
                        appendItems(analysis, sor, eor, control, dir);
                        status.eor = dir = skipBoundryNeutrals(analysis, unicode, length, sor, eor, control);
                    } else {
                        eor = current; status.eor = dir;
                    }
                    break;
                case QChar::DirES:
                case QChar::DirET:
                case QChar::DirCS:
                case QChar::DirBN:
                case QChar::DirB:
                case QChar::DirS:
                case QChar::DirWS:
                case QChar::DirON:
                    if(dir != QChar::DirL) {
                        //last stuff takes embedding dir
                        if(control.direction() == QChar::DirR) {
                            if(status.eor != QChar::DirR) {
                                // AN or EN
                                appendItems(analysis, sor, eor, control, dir);
                                status.eor = QChar::DirON;
                                dir = QChar::DirR;
                            }
                            eor = current - 1;
                            appendItems(analysis, sor, eor, control, dir);
                            status.eor = dir = skipBoundryNeutrals(analysis, unicode, length, sor, eor, control);
                        } else {
                            if(status.eor != QChar::DirL) {
                                appendItems(analysis, sor, eor, control, dir);
                                status.eor = QChar::DirON;
                                dir = QChar::DirL;
                            } else {
                                eor = current; status.eor = QChar::DirL; break;
                            }
                        }
                    } else {
                        eor = current; status.eor = QChar::DirL;
                    }
                default:
                    break;
                }
            status.lastStrong = QChar::DirL;
            break;
        case QChar::DirAL:
        case QChar::DirR:
            hasBidi = true;
            if(dir == QChar::DirON) dir = QChar::DirR;
            switch(status.last)
                {
                case QChar::DirL:
                case QChar::DirEN:
                case QChar::DirAN:
                    if (eor >= 0)
                        appendItems(analysis, sor, eor, control, dir);
                    // fall through
                case QChar::DirR:
                case QChar::DirAL:
                    dir = QChar::DirR; eor = current; status.eor = QChar::DirR; break;
                case QChar::DirES:
                case QChar::DirET:
                case QChar::DirCS:
                case QChar::DirBN:
                case QChar::DirB:
                case QChar::DirS:
                case QChar::DirWS:
                case QChar::DirON:
                    if(status.eor != QChar::DirR && status.eor != QChar::DirAL) {
                        //last stuff takes embedding dir
                        if(control.direction() == QChar::DirR
                           || status.lastStrong == QChar::DirR || status.lastStrong == QChar::DirAL) {
                            appendItems(analysis, sor, eor, control, dir);
                            dir = QChar::DirR; status.eor = QChar::DirON;
                            eor = current;
                        } else {
                            eor = current - 1;
                            appendItems(analysis, sor, eor, control, dir);
                            dir = QChar::DirR; status.eor = QChar::DirON;
                        }
                    } else {
                        eor = current; status.eor = QChar::DirR;
                    }
                default:
                    break;
                }
            status.lastStrong = dirCurrent;
            break;

            // weak types:

        case QChar::DirNSM:
            if (eor == current-1)
                eor = current;
            break;
        case QChar::DirEN:
            // if last strong was AL change EN to AN
            if(status.lastStrong != QChar::DirAL) {
                if(dir == QChar::DirON) {
                    if(status.lastStrong == QChar::DirL)
                        dir = QChar::DirL;
                    else
                        dir = QChar::DirEN;
                }
                switch(status.last)
                    {
                    case QChar::DirET:
                        if (status.lastStrong == QChar::DirR || status.lastStrong == QChar::DirAL) {
                            appendItems(analysis, sor, eor, control, dir);
                            status.eor = QChar::DirON;
                            dir = QChar::DirAN;
                        }
                        // fall through
                    case QChar::DirEN:
                    case QChar::DirL:
                        eor = current;
                        status.eor = dirCurrent;
                        break;
                    case QChar::DirR:
                    case QChar::DirAL:
                    case QChar::DirAN:
                        if (eor >= 0)
                            appendItems(analysis, sor, eor, control, dir);
                        else
                            eor = current;
                        status.eor = QChar::DirEN;
                        dir = QChar::DirAN; break;
                    case QChar::DirES:
                    case QChar::DirCS:
                        if(status.eor == QChar::DirEN || dir == QChar::DirAN) {
                            eor = current; break;
                        }
                    case QChar::DirBN:
                    case QChar::DirB:
                    case QChar::DirS:
                    case QChar::DirWS:
                    case QChar::DirON:
                        if(status.eor == QChar::DirR) {
                            // neutrals go to R
                            eor = current - 1;
                            appendItems(analysis, sor, eor, control, dir);
                            dir = QChar::DirON; status.eor = QChar::DirEN;
                            dir = QChar::DirAN;
                        }
                        else if(status.eor == QChar::DirL ||
                                 (status.eor == QChar::DirEN && status.lastStrong == QChar::DirL)) {
                            eor = current; status.eor = dirCurrent;
                        } else {
                            // numbers on both sides, neutrals get right to left direction
                            if(dir != QChar::DirL) {
                                appendItems(analysis, sor, eor, control, dir);
                                dir = QChar::DirON; status.eor = QChar::DirON;
                                eor = current - 1;
                                dir = QChar::DirR;
                                appendItems(analysis, sor, eor, control, dir);
                                dir = QChar::DirON; status.eor = QChar::DirON;
                                dir = QChar::DirAN;
                            } else {
                                eor = current; status.eor = dirCurrent;
                            }
                        }
                    default:
                        break;
                    }
                break;
            }
        case QChar::DirAN:
            hasBidi = true;
            dirCurrent = QChar::DirAN;
            if(dir == QChar::DirON) dir = QChar::DirAN;
            switch(status.last)
                {
                case QChar::DirL:
                case QChar::DirAN:
                    eor = current; status.eor = QChar::DirAN; break;
                case QChar::DirR:
                case QChar::DirAL:
                case QChar::DirEN:
                    if (eor >= 0){
                        appendItems(analysis, sor, eor, control, dir);
                    } else {
                        eor = current;
                    }
                    dir = QChar::DirAN; status.eor = QChar::DirAN;
                    break;
                case QChar::DirCS:
                    if(status.eor == QChar::DirAN) {
                        eor = current; break;
                    }
                case QChar::DirES:
                case QChar::DirET:
                case QChar::DirBN:
                case QChar::DirB:
                case QChar::DirS:
                case QChar::DirWS:
                case QChar::DirON:
                    if(status.eor == QChar::DirR) {
                        // neutrals go to R
                        eor = current - 1;
                        appendItems(analysis, sor, eor, control, dir);
                        status.eor = QChar::DirAN;
                        dir = QChar::DirAN;
                    } else if(status.eor == QChar::DirL ||
                               (status.eor == QChar::DirEN && status.lastStrong == QChar::DirL)) {
                        eor = current; status.eor = dirCurrent;
                    } else {
                        // numbers on both sides, neutrals get right to left direction
                        if(dir != QChar::DirL) {
                            appendItems(analysis, sor, eor, control, dir);
                            status.eor = QChar::DirON;
                            eor = current - 1;
                            dir = QChar::DirR;
                            appendItems(analysis, sor, eor, control, dir);
                            status.eor = QChar::DirAN;
                            dir = QChar::DirAN;
                        } else {
                            eor = current; status.eor = dirCurrent;
                        }
                    }
                default:
                    break;
                }
            break;
        case QChar::DirES:
        case QChar::DirCS:
            break;
        case QChar::DirET:
            if(status.last == QChar::DirEN) {
                dirCurrent = QChar::DirEN;
                eor = current; status.eor = dirCurrent;
            }
            break;

            // boundary neutrals should be ignored
        case QChar::DirBN:
            break;
            // neutrals
        case QChar::DirB:
            // ### what do we do with newline and paragraph separators that come to here?
            break;
        case QChar::DirS:
            // ### implement rule L1
            break;
        case QChar::DirWS:
        case QChar::DirON:
            break;
        default:
            break;
        }

        //qDebug() << "     after: dir=" << //        dir << " current=" << dirCurrent << " last=" << status.last << " eor=" << status.eor << " lastStrong=" << status.lastStrong << " embedding=" << control.direction();

        if(current >= (int)length) break;

        // set status.last as needed.
        switch(dirCurrent) {
        case QChar::DirET:
        case QChar::DirES:
        case QChar::DirCS:
        case QChar::DirS:
        case QChar::DirWS:
        case QChar::DirON:
            switch(status.last)
            {
            case QChar::DirL:
            case QChar::DirR:
            case QChar::DirAL:
            case QChar::DirEN:
            case QChar::DirAN:
                status.last = dirCurrent;
                break;
            default:
                status.last = QChar::DirON;
            }
            break;
        case QChar::DirNSM:
        case QChar::DirBN:
            // ignore these
            break;
        case QChar::DirLRO:
        case QChar::DirLRE:
            status.last = QChar::DirL;
            break;
        case QChar::DirRLO:
        case QChar::DirRLE:
            status.last = QChar::DirR;
            break;
        case QChar::DirEN:
            if (status.last == QChar::DirL) {
                status.last = QChar::DirL;
                break;
            }
            // fall through
        default:
            status.last = dirCurrent;
        }

        ++current;
    }

#if (BIDI_DEBUG >= 1)
    qDebug() << "reached end of line current=" << current << ", eor=" << eor;
#endif
    eor = current - 1; // remove dummy char

    if (sor <= eor)
        appendItems(analysis, sor, eor, control, dir);

    return hasBidi;
}

enableHarfBuzz()

static bool enableHarfBuzz ( )

static

Definition at line 891 of file qtextengine.cpp.

Referenced by QTextEngine::shapeText().

{
    static enum { Yes, No, Unknown } status = Unknown;

    if (status == Unknown) {
        QByteArray v = qgetenv("QT_ENABLE_HARFBUZZ");
        bool value = !v.isEmpty() && v != "0" && v != "false";
        if (value) status = Yes;
        else status = No;
    }
    return status == Yes;
}

hasCaseChange()

static bool hasCaseChange ( const QScriptItem &  si )

inlinestatic

Definition at line 987 of file qtextengine.cpp.

Referenced by QTextEngine::shapeTextWithCE(), and QTextEngine::shapeTextWithHarfbuzz().

{
    return si.analysis.flags == QScriptAnalysis::SmallCaps ||
           si.analysis.flags == QScriptAnalysis::Uppercase ||
           si.analysis.flags == QScriptAnalysis::Lowercase;
}

heuristicSetGlyphAttributes()

static void heuristicSetGlyphAttributes ( const QChar *  uc, int  length, QGlyphLayout *  glyphs, unsigned short *  logClusters, int  num_glyphs  )

static

Definition at line 998 of file qtextengine.cpp.

Referenced by QTextEngine::shapeTextWithCE().

{
    // ### zeroWidth and justification are missing here!!!!!

    Q_UNUSED(num_glyphs);
    Q_ASSERT(num_glyphs <= length);

//     qDebug("QScriptEngine::heuristicSetGlyphAttributes, num_glyphs=%d", item->num_glyphs);

    int glyph_pos = 0;
    for (int i = 0; i < length; i++) {
        if (uc[i].isHighSurrogate() && i < length-1 && uc[i+1].isLowSurrogate()) {
            logClusters[i] = glyph_pos;
            logClusters[++i] = glyph_pos;
        } else {
            logClusters[i] = glyph_pos;
        }
        ++glyph_pos;
    }

    // first char in a run is never (treated as) a mark
    int cStart = 0;

    const bool symbolFont = false; // ####
    glyphs->attributes[0].mark = false;
    glyphs->attributes[0].clusterStart = true;
    glyphs->attributes[0].dontPrint = (!symbolFont && uc[0].unicode() == 0x00ad) || qIsControlChar(uc[0].unicode());

    int pos = 0;
    int lastCat = QChar::category(uc[0].unicode());
    for (int i = 1; i < length; ++i) {
        if (logClusters[i] == pos)
            // same glyph
            continue;
        ++pos;
        while (pos < logClusters[i]) {
            glyphs[pos].attributes = glyphs[pos-1].attributes;
            ++pos;
        }
        // hide soft-hyphens by default
        if ((!symbolFont && uc[i].unicode() == 0x00ad) || qIsControlChar(uc[i].unicode()))
            glyphs->attributes[pos].dontPrint = true;
        const QUnicodeTables::Properties *prop = QUnicodeTables::properties(uc[i].unicode());
        int cat = prop->category;
        if (cat != QChar::Mark_NonSpacing) {
            glyphs->attributes[pos].mark = false;
            glyphs->attributes[pos].clusterStart = true;
            glyphs->attributes[pos].combiningClass = 0;
            cStart = logClusters[i];
        } else {
            int cmb = prop->combiningClass;

            if (cmb == 0) {
                // Fix 0 combining classes
                if ((uc[pos].unicode() & 0xff00) == 0x0e00) {
                    // thai or lao
                    unsigned char col = uc[pos].cell();
                    if (col == 0x31 ||
                         col == 0x34 ||
                         col == 0x35 ||
                         col == 0x36 ||
                         col == 0x37 ||
                         col == 0x47 ||
                         col == 0x4c ||
                         col == 0x4d ||
                         col == 0x4e) {
                        cmb = QChar::Combining_AboveRight;
                    } else if (col == 0xb1 ||
                                col == 0xb4 ||
                                col == 0xb5 ||
                                col == 0xb6 ||
                                col == 0xb7 ||
                                col == 0xbb ||
                                col == 0xcc ||
                                col == 0xcd) {
                        cmb = QChar::Combining_Above;
                    } else if (col == 0xbc) {
                        cmb = QChar::Combining_Below;
                    }
                }
            }

            glyphs->attributes[pos].mark = true;
            glyphs->attributes[pos].clusterStart = false;
            glyphs->attributes[pos].combiningClass = cmb;
            logClusters[i] = cStart;
            glyphs->advances_x[pos] = 0;
            glyphs->advances_y[pos] = 0;
        }

        // one gets an inter character justification point if the current char is not a non spacing mark.
        // as then the current char belongs to the last one and one gets a space justification point
        // after the space char.
        if (lastCat == QChar::Separator_Space)
            glyphs->attributes[pos-1].justification = HB_Space;
        else if (cat != QChar::Mark_NonSpacing)
            glyphs->attributes[pos-1].justification = HB_Character;
        else
            glyphs->attributes[pos-1].justification = HB_NoJustification;

        lastCat = cat;
    }
    pos = logClusters[length-1];
    if (lastCat == QChar::Separator_Space)
        glyphs->attributes[pos].justification = HB_Space;
    else
        glyphs->attributes[pos].justification = HB_Character;
}

init()

static void init ( QTextEngine *  e )

static

Definition at line 1368 of file qtextengine.cpp.

Referenced by QTextEngine::QTextEngine().

{
    e->ignoreBidi = false;
    e->cacheGlyphs = false;
    e->forceJustification = false;
    e->visualMovement = false;

    e->layoutData = 0;

    e->minWidth = 0;
    e->maxWidth = 0;

    e->underlinePositions = 0;
    e->specialData = 0;
    e->stackEngine = false;
}

moveGlyphData()

static void moveGlyphData ( const QGlyphLayout &  destination, const QGlyphLayout &  source, int  num  )

inlinestatic

Definition at line 1175 of file qtextengine.cpp.

Referenced by QTextEngine::shapeTextWithHarfbuzz().

{
    if (num > 0 && destination.glyphs != source.glyphs) {
        memmove(destination.glyphs, source.glyphs, num * sizeof(HB_Glyph));
        memmove(destination.attributes, source.attributes, num * sizeof(HB_GlyphAttributes));
        memmove(destination.advances_x, source.advances_x, num * sizeof(HB_Fixed));
        memmove(destination.offsets, source.offsets, num * sizeof(HB_FixedPoint));
    }
}

nextCharJoins()

static bool nextCharJoins ( const QString &  string, int  pos  )

inlinestatic

Definition at line 2467 of file qtextengine.cpp.

Referenced by QTextEngine::elidedText().

{
    while (pos < string.length() && string.at(pos).category() == QChar::Mark_NonSpacing)
        ++pos;
    if (pos == string.length())
        return false;
    return string.at(pos).joining() != QChar::OtherJoining;
}

prevCharJoins()

static bool prevCharJoins ( const QString &  string, int  pos  )

inlinestatic

Definition at line 2476 of file qtextengine.cpp.

Referenced by QTextEngine::elidedText().

{
    while (pos > 0 && string.at(pos - 1).category() == QChar::Mark_NonSpacing)
        --pos;
    if (pos == 0)
        return false;
    QChar::Joining joining = string.at(pos - 1).joining();
    return (joining == QChar::Dual || joining == QChar::Center);
}

Q_DECLARE_TYPEINFO()

Q_DECLARE_TYPEINFO	(	QJustificationPoint	,
		Q_PRIMITIVE_TYPE
	)

qt_true_matrix()

QTransform qt_true_matrix	(	qreal	w,
		qreal	h,
		QTransform	x
	)

Definition at line 3154 of file qtextengine.cpp.

Referenced by glyph_metrics_t::transformed().

{
    QRectF rect = x.mapRect(QRectF(0, 0, w, h));
    return x * QTransform::fromTranslate(-rect.x(), -rect.y());
}

releaseCachedFontEngine()

static void releaseCachedFontEngine ( QFontEngine *  fontEngine )

inlinestatic

Definition at line 1454 of file qtextengine.cpp.

Referenced by QTextEngine::fontEngine(), and QTextEngine::resetFontEngineCache().

{
    if (fontEngine) {
        fontEngine->ref.deref();
        if (fontEngine->cache_count == 0 && fontEngine->ref == 0)
            delete fontEngine;
    }
}

set()

static void set ( QJustificationPoint *  point, int  type, const QGlyphLayout &  glyph, QFontEngine *  fe  )

static

Definition at line 1974 of file qtextengine.cpp.

Referenced by QX11PaintEngine::drawFreetype(), QFontEngineFT::loadFlags(), QFontEngineFT::loadGlyph(), and QFontEngineX11FT::uploadGlyphToServer().

{
    point->type = type;
    point->glyph = glyph;
    point->fontEngine = fe;

    if (type >= HB_Arabic_Normal) {
        QChar ch(0x640); // Kashida character
        QGlyphLayoutArray<8> glyphs;
        int nglyphs = 7;
        fe->stringToCMap(&ch, 1, &glyphs, &nglyphs, 0);
        if (glyphs.glyphs[0] && glyphs.advances_x[0] != 0) {
            point->kashidaWidth = glyphs.advances_x[0];
        } else {
            point->type = HB_NoJustification;
            point->kashidaWidth = 0;
        }
    }
}

skipBoundryNeutrals()

static QChar::Direction skipBoundryNeutrals ( QScriptAnalysis *  analysis, const ushort *  unicode, int  length, int &  sor, int &  eor, QBidiControl &  control  )

static

Definition at line 335 of file qtextengine.cpp.

Referenced by bidiItemize().

{
    QChar::Direction dir = control.basicDirection();
    int level = sor > 0 ? analysis[sor - 1].bidiLevel : control.level;
    while (sor < length) {
        dir = QChar::direction(unicode[sor]);
        // Keep skipping DirBN as if it doesn't exist
        if (dir != QChar::DirBN)
            break;
        analysis[sor++].bidiLevel = level;
    }

    eor = sor;
    if (eor == length)
        dir = control.basicDirection();

    return dir;
}

stringToGlyphs()

static bool stringToGlyphs ( HB_ShaperItem *  item, QGlyphLayout *  glyphs, QFontEngine *  fontEngine  )

static

Definition at line 846 of file qtextengine.cpp.

Referenced by QTextEngine::shapeTextWithHarfbuzz().

{
    int nGlyphs = item->num_glyphs;

    QTextEngine::ShaperFlags shaperFlags(QTextEngine::GlyphIndicesOnly);
    if (item->item.bidiLevel % 2)
        shaperFlags |= QTextEngine::RightToLeft;

    bool result = fontEngine->stringToCMap(reinterpret_cast<const QChar *>(item->string + item->item.pos), item->item.length, glyphs, &nGlyphs, shaperFlags);
    item->num_glyphs = nGlyphs;
    glyphs->numGlyphs = nGlyphs;
    return result;
}