qfontengine_mac.mm File Reference

#include "qfontengine_mac_p.h"
#include <private/qapplication_p.h>
#include <private/qfontengine_p.h>
#include <private/qpainter_p.h>
#include <private/qtextengine_p.h>
#include <qbitmap.h>
#include <private/qpaintengine_mac_p.h>
#include <private/qprintengine_mac_p.h>
#include <qglobal.h>
#include <qpixmap.h>
#include <qpixmapcache.h>
#include <qvarlengtharray.h>
#include <qdebug.h>
#include <qendian.h>
#include <qmath.h>
#include <private/qimage_p.h>
#include <ApplicationServices/ApplicationServices.h>
#include <AppKit/AppKit.h>

Go to the source code of this file.

Classes
struct	QGlyphLayoutInfo
class	QMacFontPath

Macros
#define	FixedToQFixed(a)   QFixed::fromFixed((a) >> 10)
#define	QFixedToFixed(x)   ((x).value() << 10)

Functions
static void	addGlyphsToPathHelper (ATSUStyle style, glyph_t *glyphs, QFixedPoint *positions, int numGlyphs, QPainterPath *path)
static OSStatus	atsuPostLayoutCallback (ATSULayoutOperationSelector selector, ATSULineRef lineRef, URefCon refCon, void *operationExtraParameter, ATSULayoutOperationCallbackStatus *callbackStatus)
static unsigned int	getChar (const QChar *str, int &i, const int len)

Variables
int	qt_antialiasing_threshold

Macro Definition Documentation

FixedToQFixed

#define FixedToQFixed

(

a

)

QFixed::fromFixed((a) >> 10)

Definition at line 73 of file qfontengine_mac.mm.

Referenced by atsuPostLayoutCallback().

QFixedToFixed

#define QFixedToFixed

(

x

)

((x).value() << 10)

Definition at line 74 of file qfontengine_mac.mm.

Function Documentation

addGlyphsToPathHelper()

static void addGlyphsToPathHelper ( ATSUStyle  style, glyph_t *  glyphs, QFixedPoint *  positions, int  numGlyphs, QPainterPath *  path  )

static

Definition at line 890 of file qfontengine_mac.mm.

Referenced by QFontEngineMac::addGlyphsToPath(), and QFontEngineMac::getUnscaledGlyph().

{
    if (!numGlyphs)
        return;

    OSStatus e;

    QMacFontPath fontpath(0, 0, path);
    ATSCubicMoveToUPP moveTo = NewATSCubicMoveToUPP(QMacFontPath::moveTo);
    ATSCubicLineToUPP lineTo = NewATSCubicLineToUPP(QMacFontPath::lineTo);
    ATSCubicCurveToUPP cubicTo = NewATSCubicCurveToUPP(QMacFontPath::cubicTo);
    ATSCubicClosePathUPP closePath = NewATSCubicClosePathUPP(QMacFontPath::closePath);

    // CTFontCreatePathForGlyph
    for (int i = 0; i < numGlyphs; ++i) {
        GlyphID glyph = glyphs[i];

        fontpath.setPosition(positions[i].x.toReal(), positions[i].y.toReal());
        ATSUGlyphGetCubicPaths(style, glyph, moveTo, lineTo,
                               cubicTo, closePath, &fontpath, &e);
    }

    DisposeATSCubicMoveToUPP(moveTo);
    DisposeATSCubicLineToUPP(lineTo);
    DisposeATSCubicCurveToUPP(cubicTo);
    DisposeATSCubicClosePathUPP(closePath);
}

atsuPostLayoutCallback()

static OSStatus atsuPostLayoutCallback ( ATSULayoutOperationSelector  selector, ATSULineRef  lineRef, URefCon  refCon, void *  operationExtraParameter, ATSULayoutOperationCallbackStatus *  callbackStatus  )

static

Definition at line 221 of file qfontengine_mac.mm.

Referenced by QFontEngineMacMulti::stringToCMapInternal().

{
    Q_UNUSED(selector);
    Q_UNUSED(operationExtraParameter);

    QGlyphLayoutInfo *nfo = reinterpret_cast<QGlyphLayoutInfo *>(refCon);
    nfo->callbackCalled = true;

    ATSLayoutRecord *layoutData = 0;
    ItemCount itemCount = 0;

    OSStatus e = noErr;
    e = ATSUDirectGetLayoutDataArrayPtrFromLineRef(lineRef, kATSUDirectDataLayoutRecordATSLayoutRecordCurrent,
                                                   /*iCreate =*/ false,
                                                   (void **) &layoutData,
                                                   &itemCount);
    if (e != noErr)
        return e;

    *nfo->numGlyphs = itemCount - 1;

    Fixed *baselineDeltas = 0;

    e = ATSUDirectGetLayoutDataArrayPtrFromLineRef(lineRef, kATSUDirectDataBaselineDeltaFixedArray,
                                                   /*iCreate =*/ true,
                                                   (void **) &baselineDeltas,
                                                   &itemCount);
    if (e != noErr)
        return e;

    int nextCharStop = -1;
    int currentClusterGlyph = -1; // first glyph in log cluster
    QFontEngineMacMulti::ShaperItem *item = nfo->shaperItem;
    if (item->charAttributes) {
        item = nfo->shaperItem;
#if !defined(QT_NO_DEBUG)
        int surrogates = 0;
        const QChar *str = item->string;
        for (int i = item->from; i < item->from + item->length - 1; ++i)
            surrogates += (str[i].isHighSurrogate() && str[i+1].isLowSurrogate());
#endif
        for (nextCharStop = item->from; nextCharStop < item->from + item->length; ++nextCharStop)
            if (item->charAttributes[nextCharStop].charStop)
                break;
        nextCharStop -= item->from;
    }

    nfo->glyphs->attributes[0].clusterStart = true;
    int glyphIdx = 0;
    int glyphIncrement = 1;
    if (nfo->flags & QTextEngine::RightToLeft) {
        glyphIdx  = itemCount - 2;
        glyphIncrement = -1;
    }
    for (int i = 0; i < *nfo->numGlyphs; ++i, glyphIdx += glyphIncrement) {

        int charOffset = layoutData[glyphIdx].originalOffset / sizeof(UniChar);
        const int fontIdx = nfo->mappedFonts[charOffset];

        ATSGlyphRef glyphId = layoutData[glyphIdx].glyphID;

        QFixed yAdvance = FixedToQFixed(baselineDeltas[glyphIdx]);
        QFixed xAdvance = FixedToQFixed(layoutData[glyphIdx + 1].realPos - layoutData[glyphIdx].realPos);

        if (nfo->styleStrategy & QFont::ForceIntegerMetrics) {
            yAdvance = yAdvance.round();
            xAdvance = xAdvance.round();
        }

        if (glyphId != 0xffff || i == 0) {
            if (i < nfo->glyphs->numGlyphs)
            {
                nfo->glyphs->glyphs[i] = (glyphId & 0x00ffffff) | (fontIdx << 24);

                nfo->glyphs->advances_y[i] = yAdvance;
                nfo->glyphs->advances_x[i] = xAdvance;
            }
        } else {
            // ATSUI gives us 0xffff as glyph id at the index in the glyph array for
            // a character position that maps to a ligtature. Such a glyph id does not
            // result in any visual glyph, but it may have an advance, which is why we
            // sum up the glyph advances.
            --i;
            nfo->glyphs->advances_y[i] += yAdvance;
            nfo->glyphs->advances_x[i] += xAdvance;
            *nfo->numGlyphs -= 1;
        }

        if (item->log_clusters) {
            if (charOffset >= nextCharStop) {
                nfo->glyphs->attributes[i].clusterStart = true;
                currentClusterGlyph = i;

                ++nextCharStop;
                for (; nextCharStop < item->length; ++nextCharStop)
                    if (item->charAttributes[item->from + nextCharStop].charStop)
                        break;
            } else {
                if (currentClusterGlyph == -1)
                    currentClusterGlyph = i;
            }
            item->log_clusters[charOffset] = currentClusterGlyph;

            // surrogate handling
            if (charOffset < item->length - 1) {
                QChar current = item->string[item->from + charOffset];
                QChar next = item->string[item->from + charOffset + 1];
                if (current.isHighSurrogate() && next.isLowSurrogate())
                    item->log_clusters[charOffset + 1] = currentClusterGlyph;
            }
        }
    }

    /*
    if (item) {
        qDebug() << "resulting logclusters:";
        for (int i = 0; i < item->length; ++i)
            qDebug() << "logClusters[" << i << "] =" << item->log_clusters[i];
        qDebug() << "clusterstarts:";
        for (int i = 0; i < *nfo->numGlyphs; ++i)
            qDebug() << "clusterStart[" << i << "] =" << nfo->glyphs[i].attributes.clusterStart;
    }
    */

    ATSUDirectReleaseLayoutDataArrayPtr(lineRef, kATSUDirectDataBaselineDeltaFixedArray,
                                        (void **) &baselineDeltas);

    ATSUDirectReleaseLayoutDataArrayPtr(lineRef, kATSUDirectDataLayoutRecordATSLayoutRecordCurrent,
                                        (void **) &layoutData);

    *callbackStatus = kATSULayoutOperationCallbackStatusHandled;
    return noErr;
}

getChar()

static unsigned int getChar ( const QChar *  str, int &  i, const int  len  )

inlinestatic

Definition at line 735 of file qfontengine_mac.mm.

Referenced by QFontEngineMac::stringToCMap().

{
    uint ucs4 = str[i].unicode();
    if (str[i].isHighSurrogate() && i < len-1 && str[i+1].isLowSurrogate()) {
        ++i;
        ucs4 = QChar::surrogateToUcs4(ucs4, str[i].unicode());
    }
    return ucs4;
}

Variable Documentation

qt_antialiasing_threshold

int qt_antialiasing_threshold

Definition at line 495 of file qapplication.cpp.

Referenced by QFontEngineMac::imageForGlyph().