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Diffstat (limited to 'src/platformsupport/fontdatabases/mac/qfontengine_coretext.mm')
| -rw-r--r-- | src/platformsupport/fontdatabases/mac/qfontengine_coretext.mm | 882 |
1 files changed, 882 insertions, 0 deletions
diff --git a/src/platformsupport/fontdatabases/mac/qfontengine_coretext.mm b/src/platformsupport/fontdatabases/mac/qfontengine_coretext.mm new file mode 100644 index 0000000000..9a84dfc3dd --- /dev/null +++ b/src/platformsupport/fontdatabases/mac/qfontengine_coretext.mm @@ -0,0 +1,882 @@ +/**************************************************************************** +** +** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the QtGui module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** GNU Lesser General Public License Usage +** This file may be used under the terms of the GNU Lesser General Public +** License version 2.1 as published by the Free Software Foundation and +** appearing in the file LICENSE.LGPL included in the packaging of this +** file. Please review the following information to ensure the GNU Lesser +** General Public License version 2.1 requirements will be met: +** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain additional +** rights. These rights are described in the Nokia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU General +** Public License version 3.0 as published by the Free Software Foundation +** and appearing in the file LICENSE.GPL included in the packaging of this +** file. Please review the following information to ensure the GNU General +** Public License version 3.0 requirements will be met: +** http://www.gnu.org/copyleft/gpl.html. +** +** Other Usage +** Alternatively, this file may be used in accordance with the terms and +** conditions contained in a signed written agreement between you and Nokia. +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qfontengine_coretext_p.h" + +#include <QtCore/qendian.h> +#include <QtCore/qsettings.h> + +#include <private/qimage_p.h> + +#if !defined(Q_WS_MAC) || (MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_5) + +QT_BEGIN_NAMESPACE + +static float SYNTHETIC_ITALIC_SKEW = tanf(14 * acosf(0) / 90); + +static void loadAdvancesForGlyphs(CTFontRef ctfont, + QVarLengthArray<CGGlyph> &cgGlyphs, + QGlyphLayout *glyphs, int len, + QTextEngine::ShaperFlags flags, + const QFontDef &fontDef) +{ + Q_UNUSED(flags); + QVarLengthArray<CGSize> advances(len); + CTFontGetAdvancesForGlyphs(ctfont, kCTFontHorizontalOrientation, cgGlyphs.data(), advances.data(), len); + + for (int i = 0; i < len; ++i) { + if (glyphs->glyphs[i] & 0xff000000) + continue; + glyphs->advances_x[i] = QFixed::fromReal(advances[i].width); + glyphs->advances_y[i] = QFixed::fromReal(advances[i].height); + } + + if (fontDef.styleStrategy & QFont::ForceIntegerMetrics) { + for (int i = 0; i < len; ++i) { + glyphs->advances_x[i] = glyphs->advances_x[i].round(); + glyphs->advances_y[i] = glyphs->advances_y[i].round(); + } + } +} + +QCoreTextFontEngineMulti::QCoreTextFontEngineMulti(const QCFString &name, const QFontDef &fontDef, bool kerning) + : QFontEngineMulti(0) +{ + this->fontDef = fontDef; + CTFontSymbolicTraits symbolicTraits = 0; + if (fontDef.weight >= QFont::Bold) + symbolicTraits |= kCTFontBoldTrait; + switch (fontDef.style) { + case QFont::StyleNormal: + break; + case QFont::StyleItalic: + case QFont::StyleOblique: + symbolicTraits |= kCTFontItalicTrait; + break; + } + + transform = CGAffineTransformIdentity; + if (fontDef.stretch != 100) { + transform = CGAffineTransformMakeScale(float(fontDef.stretch) / float(100), 1); + } + + QCFType<CTFontDescriptorRef> descriptor = CTFontDescriptorCreateWithNameAndSize(name, fontDef.pixelSize); + QCFType<CTFontRef> baseFont = CTFontCreateWithFontDescriptor(descriptor, fontDef.pixelSize, &transform); + ctfont = NULL; + // There is a side effect in Core Text: if we apply 0 as symbolic traits to a font in normal weight, + // we will get the light version of that font (while the way supposed to work doesn't: + // setting kCTFontWeightTrait to some value between -1.0 to 0.0 has no effect on font selection) + if (fontDef.weight != QFont::Normal || symbolicTraits) + ctfont = CTFontCreateCopyWithSymbolicTraits(baseFont, fontDef.pixelSize, &transform, symbolicTraits, symbolicTraits); + + // CTFontCreateCopyWithSymbolicTraits returns NULL if we ask for a trait that does + // not exist for the given font. (for example italic) + if (ctfont == 0) { + ctfont = baseFont; + CFRetain(ctfont); + } + init(kerning); +} + +QCoreTextFontEngineMulti::QCoreTextFontEngineMulti(CTFontRef ctFontRef, const QFontDef &fontDef, bool kerning) + : QFontEngineMulti(0) +{ + this->fontDef = fontDef; + ctfont = (CTFontRef) CFRetain(ctFontRef); + init(kerning); +} + +QCoreTextFontEngineMulti::~QCoreTextFontEngineMulti() +{ + CFRelease(ctfont); +} + +void QCoreTextFontEngineMulti::init(bool kerning) +{ + Q_ASSERT(ctfont != NULL); + attributeDict = CFDictionaryCreateMutable(0, 2, + &kCFTypeDictionaryKeyCallBacks, + &kCFTypeDictionaryValueCallBacks); + CFDictionaryAddValue(attributeDict, kCTFontAttributeName, ctfont); + if (!kerning) { + float zero = 0.0; + QCFType<CFNumberRef> noKern = CFNumberCreate(kCFAllocatorDefault, kCFNumberFloatType, &zero); + CFDictionaryAddValue(attributeDict, kCTKernAttributeName, noKern); + } + + QCoreTextFontEngine *fe = new QCoreTextFontEngine(ctfont, fontDef); + fontDef.family = fe->fontDef.family; + fontDef.styleName = fe->fontDef.styleName; + transform = fe->transform; + fe->ref.ref(); + engines.append(fe); +} + +uint QCoreTextFontEngineMulti::fontIndexForFont(CTFontRef font) const +{ + for (int i = 0; i < engines.count(); ++i) { + if (CFEqual(engineAt(i)->ctfont, font)) + return i; + } + + QCoreTextFontEngineMulti *that = const_cast<QCoreTextFontEngineMulti *>(this); + QCoreTextFontEngine *fe = new QCoreTextFontEngine(font, fontDef); + fe->ref.ref(); + that->engines.append(fe); + return engines.count() - 1; +} + +bool QCoreTextFontEngineMulti::stringToCMap(const QChar *str, int len, QGlyphLayout *glyphs, + int *nglyphs, QTextEngine::ShaperFlags flags, + unsigned short *logClusters, const HB_CharAttributes *, + QScriptItem *si) const +{ + QCFType<CFStringRef> cfstring = CFStringCreateWithCharactersNoCopy(0, + reinterpret_cast<const UniChar *>(str), + len, kCFAllocatorNull); + QCFType<CFAttributedStringRef> attributedString = CFAttributedStringCreate(0, cfstring, attributeDict); + QCFType<CTTypesetterRef> typeSetter; + +#if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_6 + if (flags & QTextEngine::RightToLeft) { + const void *optionKeys[] = { kCTTypesetterOptionForcedEmbeddingLevel }; + const short rtlForcedEmbeddingLevelValue = 1; + const void *rtlOptionValues[] = { CFNumberCreate(kCFAllocatorDefault, kCFNumberShortType, &rtlForcedEmbeddingLevelValue) }; + QCFType<CFDictionaryRef> options = CFDictionaryCreate(kCFAllocatorDefault, optionKeys, rtlOptionValues, 1, + &kCFCopyStringDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks); + typeSetter = CTTypesetterCreateWithAttributedStringAndOptions(attributedString, options); + } else +#else + Q_UNUSED(flags); +#endif + typeSetter = CTTypesetterCreateWithAttributedString(attributedString); + + CFRange range = {0, 0}; + QCFType<CTLineRef> line = CTTypesetterCreateLine(typeSetter, range); + CFArrayRef array = CTLineGetGlyphRuns(line); + uint arraySize = CFArrayGetCount(array); + glyph_t *outGlyphs = glyphs->glyphs; + HB_GlyphAttributes *outAttributes = glyphs->attributes; + QFixed *outAdvances_x = glyphs->advances_x; + QFixed *outAdvances_y = glyphs->advances_y; + glyph_t *initialGlyph = outGlyphs; + + if (arraySize == 0) { + // CoreText failed to shape the text we gave it, so we assume one glyph + // per character and build a list of invalid glyphs with zero advance + *nglyphs = len; + for (int i = 0; i < len; ++i) { + outGlyphs[i] = 0; + if (logClusters) + logClusters[i] = i; + outAdvances_x[i] = QFixed(); + outAdvances_y[i] = QFixed(); + outAttributes[i].clusterStart = true; + } + return true; + } + + const bool rtl = (CTRunGetStatus(static_cast<CTRunRef>(CFArrayGetValueAtIndex(array, 0))) & kCTRunStatusRightToLeft); + + bool outOBounds = false; + for (uint i = 0; i < arraySize; ++i) { + CTRunRef run = static_cast<CTRunRef>(CFArrayGetValueAtIndex(array, rtl ? (arraySize - 1 - i) : i)); + CFIndex glyphCount = CTRunGetGlyphCount(run); + if (glyphCount == 0) + continue; + + Q_ASSERT((CTRunGetStatus(run) & kCTRunStatusRightToLeft) == rtl); + CFRange stringRange = CTRunGetStringRange(run); + int prepend = 0; +#if MAC_OS_X_VERSION_MAX_ALLOWED == MAC_OS_X_VERSION_10_5 + UniChar beginGlyph = CFStringGetCharacterAtIndex(cfstring, stringRange.location); + QChar dir = QChar::direction(beginGlyph); + bool beginWithOverride = dir == QChar::DirLRO || dir == QChar::DirRLO || dir == QChar::DirLRE || dir == QChar::DirRLE; + if (beginWithOverride) { + logClusters[stringRange.location] = 0; + outGlyphs[0] = 0xFFFF; + outAdvances_x[0] = 0; + outAdvances_y[0] = 0; + outAttributes[0].clusterStart = true; + outAttributes[0].dontPrint = true; + outGlyphs++; + outAdvances_x++; + outAdvances_y++; + outAttributes++; + prepend = 1; + } +#endif + UniChar endGlyph = CFStringGetCharacterAtIndex(cfstring, stringRange.location + stringRange.length - 1); + bool endWithPDF = QChar::direction(endGlyph) == QChar::DirPDF; + if (endWithPDF) + glyphCount++; + + if (!outOBounds && outGlyphs + glyphCount - initialGlyph > *nglyphs) { + outOBounds = true; + } + if (!outOBounds) { + CFDictionaryRef runAttribs = CTRunGetAttributes(run); + //NSLog(@"Dictionary %@", runAttribs); + if (!runAttribs) + runAttribs = attributeDict; + CTFontRef runFont = static_cast<CTFontRef>(CFDictionaryGetValue(runAttribs, kCTFontAttributeName)); + uint fontIndex = fontIndexForFont(runFont); + const QFontEngine *engine = engineAt(fontIndex); + fontIndex <<= 24; + si->ascent = qMax(engine->ascent(), si->ascent); + si->descent = qMax(engine->descent(), si->descent); + si->leading = qMax(engine->leading(), si->leading); + //NSLog(@"Run Font Name = %@", CTFontCopyFamilyName(runFont)); + if (endWithPDF) + glyphCount--; + + QVarLengthArray<CGGlyph, 512> cgglyphs(0); + const CGGlyph *tmpGlyphs = CTRunGetGlyphsPtr(run); + if (!tmpGlyphs) { + cgglyphs.resize(glyphCount); + CTRunGetGlyphs(run, range, cgglyphs.data()); + tmpGlyphs = cgglyphs.constData(); + } + QVarLengthArray<CGPoint, 512> cgpoints(0); + const CGPoint *tmpPoints = CTRunGetPositionsPtr(run); + if (!tmpPoints) { + cgpoints.resize(glyphCount); + CTRunGetPositions(run, range, cgpoints.data()); + tmpPoints = cgpoints.constData(); + } + + const int rtlOffset = rtl ? (glyphCount - 1) : 0; + const int rtlSign = rtl ? -1 : 1; + + if (logClusters) { + CFRange stringRange = CTRunGetStringRange(run); + QVarLengthArray<CFIndex, 512> stringIndices(0); + const CFIndex *tmpIndices = CTRunGetStringIndicesPtr(run); + if (!tmpIndices) { + stringIndices.resize(glyphCount); + CTRunGetStringIndices(run, range, stringIndices.data()); + tmpIndices = stringIndices.constData(); + } + + const int firstGlyphIndex = outGlyphs - initialGlyph; + outAttributes[0].clusterStart = true; + + CFIndex k = 0; + CFIndex i = 0; + for (i = stringRange.location + prepend; + (i < stringRange.location + stringRange.length) && (k < glyphCount); ++i) { + if (tmpIndices[k * rtlSign + rtlOffset] == i || i == stringRange.location + prepend) { + logClusters[i] = k + firstGlyphIndex; + outAttributes[k].clusterStart = true; + ++k; + } else { + logClusters[i] = k + firstGlyphIndex - 1; + } + } + // in case of a ligature at the end, fill the remaining logcluster entries + for (;i < stringRange.location + stringRange.length; i++) { + logClusters[i] = k + firstGlyphIndex - 1; + } + } + for (CFIndex i = 0; i < glyphCount - 1; ++i) { + int idx = rtlOffset + rtlSign * i; + outGlyphs[idx] = tmpGlyphs[i] | fontIndex; + outAdvances_x[idx] = QFixed::fromReal(tmpPoints[i + 1].x - tmpPoints[i].x); + // Use negative y advance for flipped coordinate system + outAdvances_y[idx] = QFixed::fromReal(tmpPoints[i].y - tmpPoints[i + 1].y); + + if (fontDef.styleStrategy & QFont::ForceIntegerMetrics) { + outAdvances_x[idx] = outAdvances_x[idx].round(); + outAdvances_y[idx] = outAdvances_y[idx].round(); + } + } + CGSize lastGlyphAdvance; + CTFontGetAdvancesForGlyphs(runFont, kCTFontHorizontalOrientation, tmpGlyphs + glyphCount - 1, &lastGlyphAdvance, 1); + + outGlyphs[rtl ? 0 : (glyphCount - 1)] = tmpGlyphs[glyphCount - 1] | fontIndex; + outAdvances_x[rtl ? 0 : (glyphCount - 1)] = + (fontDef.styleStrategy & QFont::ForceIntegerMetrics) + ? QFixed::fromReal(lastGlyphAdvance.width).round() + : QFixed::fromReal(lastGlyphAdvance.width); + + if (endWithPDF) { + logClusters[stringRange.location + stringRange.length - 1] = glyphCount + prepend; + outGlyphs[glyphCount] = 0xFFFF; + outAdvances_x[glyphCount] = 0; + outAdvances_y[glyphCount] = 0; + outAttributes[glyphCount].clusterStart = true; + outAttributes[glyphCount].dontPrint = true; + glyphCount++; + } + } + outGlyphs += glyphCount; + outAttributes += glyphCount; + outAdvances_x += glyphCount; + outAdvances_y += glyphCount; + } + *nglyphs = (outGlyphs - initialGlyph); + return !outOBounds; +} + +bool QCoreTextFontEngineMulti::stringToCMap(const QChar *str, int len, QGlyphLayout *glyphs, + int *nglyphs, QTextEngine::ShaperFlags flags) const +{ + *nglyphs = len; + QCFType<CFStringRef> cfstring; + + QVarLengthArray<CGGlyph> cgGlyphs(len); + CTFontGetGlyphsForCharacters(ctfont, (const UniChar*)str, cgGlyphs.data(), len); + + for (int i = 0; i < len; ++i) { + if (cgGlyphs[i]) { + glyphs->glyphs[i] = cgGlyphs[i]; + } else { + if (!cfstring) + cfstring = CFStringCreateWithCharactersNoCopy(0, reinterpret_cast<const UniChar *>(str), len, kCFAllocatorNull); + QCFType<CTFontRef> substituteFont = CTFontCreateForString(ctfont, cfstring, CFRangeMake(i, 1)); + CGGlyph substituteGlyph = 0; + CTFontGetGlyphsForCharacters(substituteFont, (const UniChar*)str + i, &substituteGlyph, 1); + if (substituteGlyph) { + const uint fontIndex = (fontIndexForFont(substituteFont) << 24); + glyphs->glyphs[i] = substituteGlyph | fontIndex; + if (!(flags & QTextEngine::GlyphIndicesOnly)) { + CGSize advance; + CTFontGetAdvancesForGlyphs(substituteFont, kCTFontHorizontalOrientation, &substituteGlyph, &advance, 1); + glyphs->advances_x[i] = QFixed::fromReal(advance.width); + glyphs->advances_y[i] = QFixed::fromReal(advance.height); + } + } + } + } + + if (flags & QTextEngine::GlyphIndicesOnly) + return true; + + loadAdvancesForGlyphs(ctfont, cgGlyphs, glyphs, len, flags, fontDef); + return true; +} + +void QCoreTextFontEngineMulti::loadEngine(int) +{ + // Do nothing + Q_ASSERT(false); +} + +extern int qt_antialiasing_threshold; // from qapplication.cpp + +CGAffineTransform qt_transform_from_fontdef(const QFontDef &fontDef) +{ + CGAffineTransform transform = CGAffineTransformIdentity; + if (fontDef.stretch != 100) + transform = CGAffineTransformMakeScale(float(fontDef.stretch) / float(100), 1); + return transform; +} + +QCoreTextFontEngine::QCoreTextFontEngine(CTFontRef font, const QFontDef &def) +{ + fontDef = def; + transform = qt_transform_from_fontdef(fontDef); + ctfont = font; + CFRetain(ctfont); + cgFont = CTFontCopyGraphicsFont(font, NULL); + init(); +} + +QCoreTextFontEngine::QCoreTextFontEngine(CGFontRef font, const QFontDef &def) +{ + fontDef = def; + transform = qt_transform_from_fontdef(fontDef); + cgFont = font; + // Keep reference count balanced + CFRetain(cgFont); + ctfont = CTFontCreateWithGraphicsFont(font, fontDef.pixelSize, &transform, NULL); + init(); +} + +QCoreTextFontEngine::~QCoreTextFontEngine() +{ + CFRelease(cgFont); + CFRelease(ctfont); +} + +static QFont::Weight weightFromInteger(int weight) +{ + if (weight < 400) + return QFont::Light; + else if (weight < 600) + return QFont::Normal; + else if (weight < 700) + return QFont::DemiBold; + else if (weight < 800) + return QFont::Bold; + else + return QFont::Black; +} + +int getTraitValue(CFDictionaryRef allTraits, CFStringRef trait) +{ + if (CFDictionaryContainsKey(allTraits, trait)) { + CFNumberRef traitNum = (CFNumberRef) CFDictionaryGetValue(allTraits, trait); + float v = 0; + CFNumberGetValue(traitNum, kCFNumberFloatType, &v); + // the value we get from CFNumberRef is from -1.0 to 1.0 + int value = v * 500 + 500; + return value; + } + + return 0; +} + +void QCoreTextFontEngine::init() +{ + Q_ASSERT(ctfont != NULL); + Q_ASSERT(cgFont != NULL); + + QCFString family = CTFontCopyFamilyName(ctfont); + fontDef.family = family; + + QCFString styleName = (CFStringRef) CTFontCopyAttribute(ctfont, kCTFontStyleNameAttribute); + fontDef.styleName = styleName; + + synthesisFlags = 0; + CTFontSymbolicTraits traits = CTFontGetSymbolicTraits(ctfont); + if (traits & kCTFontItalicTrait) + fontDef.style = QFont::StyleItalic; + + CFDictionaryRef allTraits = CTFontCopyTraits(ctfont); + fontDef.weight = weightFromInteger(getTraitValue(allTraits, kCTFontWeightTrait)); + int slant = getTraitValue(allTraits, kCTFontSlantTrait); + if (slant > 500 && !(traits & kCTFontItalicTrait)) + fontDef.style = QFont::StyleOblique; + CFRelease(allTraits); + + if (fontDef.weight >= QFont::Bold && !(traits & kCTFontBoldTrait)) + synthesisFlags |= SynthesizedBold; + // XXX: we probably don't need to synthesis italic for oblique font + if (fontDef.style != QFont::StyleNormal && !(traits & kCTFontItalicTrait)) + synthesisFlags |= SynthesizedItalic; + + avgCharWidth = 0; + QByteArray os2Table = getSfntTable(MAKE_TAG('O', 'S', '/', '2')); + unsigned emSize = CTFontGetUnitsPerEm(ctfont); + if (os2Table.size() >= 10) { + fsType = qFromBigEndian<quint16>(reinterpret_cast<const uchar *>(os2Table.constData() + 8)); + // qAbs is a workaround for weird fonts like Lucida Grande + qint16 width = qAbs(qFromBigEndian<qint16>(reinterpret_cast<const uchar *>(os2Table.constData() + 2))); + avgCharWidth = QFixed::fromReal(width * fontDef.pixelSize / emSize); + } else + avgCharWidth = QFontEngine::averageCharWidth(); +} + +bool QCoreTextFontEngine::stringToCMap(const QChar *str, int len, QGlyphLayout *glyphs, + int *nglyphs, QTextEngine::ShaperFlags flags) const +{ + *nglyphs = len; + QCFType<CFStringRef> cfstring; + + QVarLengthArray<CGGlyph> cgGlyphs(len); + CTFontGetGlyphsForCharacters(ctfont, (const UniChar*)str, cgGlyphs.data(), len); + + for (int i = 0; i < len; ++i) + if (cgGlyphs[i]) + glyphs->glyphs[i] = cgGlyphs[i]; + + if (flags & QTextEngine::GlyphIndicesOnly) + return true; + + loadAdvancesForGlyphs(ctfont, cgGlyphs, glyphs, len, flags, fontDef); + return true; +} + +glyph_metrics_t QCoreTextFontEngine::boundingBox(const QGlyphLayout &glyphs) +{ + QFixed w; + bool round = fontDef.styleStrategy & QFont::ForceIntegerMetrics; + + for (int i = 0; i < glyphs.numGlyphs; ++i) { + w += round ? glyphs.effectiveAdvance(i).round() + : glyphs.effectiveAdvance(i); + } + return glyph_metrics_t(0, -(ascent()), w - lastRightBearing(glyphs, round), ascent()+descent(), w, 0); +} + +glyph_metrics_t QCoreTextFontEngine::boundingBox(glyph_t glyph) +{ + glyph_metrics_t ret; + CGGlyph g = glyph; + CGRect rect = CTFontGetBoundingRectsForGlyphs(ctfont, kCTFontHorizontalOrientation, &g, 0, 1); + if (synthesisFlags & QFontEngine::SynthesizedItalic) { + rect.size.width += rect.size.height * SYNTHETIC_ITALIC_SKEW; + } + ret.width = QFixed::fromReal(rect.size.width); + ret.height = QFixed::fromReal(rect.size.height); + ret.x = QFixed::fromReal(rect.origin.x); + ret.y = -QFixed::fromReal(rect.origin.y) - ret.height; + CGSize advances[1]; + CTFontGetAdvancesForGlyphs(ctfont, kCTFontHorizontalOrientation, &g, advances, 1); + ret.xoff = QFixed::fromReal(advances[0].width); + ret.yoff = QFixed::fromReal(advances[0].height); + + if (fontDef.styleStrategy & QFont::ForceIntegerMetrics) { + ret.xoff = ret.xoff.round(); + ret.yoff = ret.yoff.round(); + } + + return ret; +} + +QFixed QCoreTextFontEngine::ascent() const +{ + return (fontDef.styleStrategy & QFont::ForceIntegerMetrics) + ? QFixed::fromReal(CTFontGetAscent(ctfont)).round() + : QFixed::fromReal(CTFontGetAscent(ctfont)); +} +QFixed QCoreTextFontEngine::descent() const +{ + QFixed d = QFixed::fromReal(CTFontGetDescent(ctfont)); + if (fontDef.styleStrategy & QFont::ForceIntegerMetrics) + d = d.round(); + + // subtract a pixel to even out the historical +1 in QFontMetrics::height(). + // Fix in Qt 5. + return d - 1; +} +QFixed QCoreTextFontEngine::leading() const +{ + return (fontDef.styleStrategy & QFont::ForceIntegerMetrics) + ? QFixed::fromReal(CTFontGetLeading(ctfont)).round() + : QFixed::fromReal(CTFontGetLeading(ctfont)); +} +QFixed QCoreTextFontEngine::xHeight() const +{ + return (fontDef.styleStrategy & QFont::ForceIntegerMetrics) + ? QFixed::fromReal(CTFontGetXHeight(ctfont)).round() + : QFixed::fromReal(CTFontGetXHeight(ctfont)); +} + +QFixed QCoreTextFontEngine::averageCharWidth() const +{ + return (fontDef.styleStrategy & QFont::ForceIntegerMetrics) + ? avgCharWidth.round() : avgCharWidth; +} + +qreal QCoreTextFontEngine::maxCharWidth() const +{ + return 0; +} + +qreal QCoreTextFontEngine::minLeftBearing() const +{ + return 0; +} + +qreal QCoreTextFontEngine::minRightBearing() const +{ + return 0; +} + +void QCoreTextFontEngine::draw(CGContextRef ctx, qreal x, qreal y, const QTextItemInt &ti, int paintDeviceHeight) +{ + QVarLengthArray<QFixedPoint> positions; + QVarLengthArray<glyph_t> glyphs; + QTransform matrix; + matrix.translate(x, y); + getGlyphPositions(ti.glyphs, matrix, ti.flags, glyphs, positions); + if (glyphs.size() == 0) + return; + + CGContextSetFontSize(ctx, fontDef.pixelSize); + + CGAffineTransform oldTextMatrix = CGContextGetTextMatrix(ctx); + + CGAffineTransform cgMatrix = CGAffineTransformMake(1, 0, 0, -1, 0, -paintDeviceHeight); + + CGAffineTransformConcat(cgMatrix, oldTextMatrix); + + if (synthesisFlags & QFontEngine::SynthesizedItalic) + cgMatrix = CGAffineTransformConcat(cgMatrix, CGAffineTransformMake(1, 0, -SYNTHETIC_ITALIC_SKEW, 1, 0, 0)); + + cgMatrix = CGAffineTransformConcat(cgMatrix, transform); + + CGContextSetTextMatrix(ctx, cgMatrix); + + CGContextSetTextDrawingMode(ctx, kCGTextFill); + + + QVarLengthArray<CGSize> advances(glyphs.size()); + QVarLengthArray<CGGlyph> cgGlyphs(glyphs.size()); + + for (int i = 0; i < glyphs.size() - 1; ++i) { + advances[i].width = (positions[i + 1].x - positions[i].x).toReal(); + advances[i].height = (positions[i + 1].y - positions[i].y).toReal(); + cgGlyphs[i] = glyphs[i]; + } + advances[glyphs.size() - 1].width = 0; + advances[glyphs.size() - 1].height = 0; + cgGlyphs[glyphs.size() - 1] = glyphs[glyphs.size() - 1]; + + CGContextSetFont(ctx, cgFont); + //NSLog(@"Font inDraw %@ ctfont %@", CGFontCopyFullName(cgFont), CTFontCopyFamilyName(ctfont)); + + CGContextSetTextPosition(ctx, positions[0].x.toReal(), positions[0].y.toReal()); + + CGContextShowGlyphsWithAdvances(ctx, cgGlyphs.data(), advances.data(), glyphs.size()); + + if (synthesisFlags & QFontEngine::SynthesizedBold) { + CGContextSetTextPosition(ctx, positions[0].x.toReal() + 0.5 * lineThickness().toReal(), + positions[0].y.toReal()); + + CGContextShowGlyphsWithAdvances(ctx, cgGlyphs.data(), advances.data(), glyphs.size()); + } + + CGContextSetTextMatrix(ctx, oldTextMatrix); +} + +struct ConvertPathInfo +{ + ConvertPathInfo(QPainterPath *newPath, const QPointF &newPos) : path(newPath), pos(newPos) {} + QPainterPath *path; + QPointF pos; +}; + +static void convertCGPathToQPainterPath(void *info, const CGPathElement *element) +{ + ConvertPathInfo *myInfo = static_cast<ConvertPathInfo *>(info); + switch(element->type) { + case kCGPathElementMoveToPoint: + myInfo->path->moveTo(element->points[0].x + myInfo->pos.x(), + element->points[0].y + myInfo->pos.y()); + break; + case kCGPathElementAddLineToPoint: + myInfo->path->lineTo(element->points[0].x + myInfo->pos.x(), + element->points[0].y + myInfo->pos.y()); + break; + case kCGPathElementAddQuadCurveToPoint: + myInfo->path->quadTo(element->points[0].x + myInfo->pos.x(), + element->points[0].y + myInfo->pos.y(), + element->points[1].x + myInfo->pos.x(), + element->points[1].y + myInfo->pos.y()); + break; + case kCGPathElementAddCurveToPoint: + myInfo->path->cubicTo(element->points[0].x + myInfo->pos.x(), + element->points[0].y + myInfo->pos.y(), + element->points[1].x + myInfo->pos.x(), + element->points[1].y + myInfo->pos.y(), + element->points[2].x + myInfo->pos.x(), + element->points[2].y + myInfo->pos.y()); + break; + case kCGPathElementCloseSubpath: + myInfo->path->closeSubpath(); + break; + default: + qDebug() << "Unhandled path transform type: " << element->type; + } + +} + +void QCoreTextFontEngine::addGlyphsToPath(glyph_t *glyphs, QFixedPoint *positions, int nGlyphs, + QPainterPath *path, QTextItem::RenderFlags) +{ + CGAffineTransform cgMatrix = CGAffineTransformIdentity; + cgMatrix = CGAffineTransformScale(cgMatrix, 1, -1); + + if (synthesisFlags & QFontEngine::SynthesizedItalic) + cgMatrix = CGAffineTransformConcat(cgMatrix, CGAffineTransformMake(1, 0, -SYNTHETIC_ITALIC_SKEW, 1, 0, 0)); + + for (int i = 0; i < nGlyphs; ++i) { + QCFType<CGPathRef> cgpath = CTFontCreatePathForGlyph(ctfont, glyphs[i], &cgMatrix); + ConvertPathInfo info(path, positions[i].toPointF()); + CGPathApply(cgpath, &info, convertCGPathToQPainterPath); + } +} + +QImage QCoreTextFontEngine::imageForGlyph(glyph_t glyph, QFixed subPixelPosition, int /*margin*/, bool aa) +{ + const glyph_metrics_t br = boundingBox(glyph); + QImage im(qRound(br.width)+2, qRound(br.height)+2, QImage::Format_RGB32); + im.fill(0); + + CGColorSpaceRef colorspace = CGColorSpaceCreateWithName(kCGColorSpaceGenericRGB); + uint cgflags = kCGImageAlphaNoneSkipFirst; +#ifdef kCGBitmapByteOrder32Host //only needed because CGImage.h added symbols in the minor version + cgflags |= kCGBitmapByteOrder32Host; +#endif + CGContextRef ctx = CGBitmapContextCreate(im.bits(), im.width(), im.height(), + 8, im.bytesPerLine(), colorspace, + cgflags); + CGContextSetFontSize(ctx, fontDef.pixelSize); + CGContextSetShouldAntialias(ctx, (aa || fontDef.pointSize > qt_antialiasing_threshold) + && !(fontDef.styleStrategy & QFont::NoAntialias)); + CGContextSetShouldSmoothFonts(ctx, aa); + CGAffineTransform oldTextMatrix = CGContextGetTextMatrix(ctx); + CGAffineTransform cgMatrix = CGAffineTransformMake(1, 0, 0, 1, 0, 0); + + CGAffineTransformConcat(cgMatrix, oldTextMatrix); + + if (synthesisFlags & QFontEngine::SynthesizedItalic) + cgMatrix = CGAffineTransformConcat(cgMatrix, CGAffineTransformMake(1, 0, SYNTHETIC_ITALIC_SKEW, 1, 0, 0)); + + cgMatrix = CGAffineTransformConcat(cgMatrix, transform); + + CGContextSetTextMatrix(ctx, cgMatrix); + CGContextSetRGBFillColor(ctx, 1, 1, 1, 1); + CGContextSetTextDrawingMode(ctx, kCGTextFill); + + CGContextSetFont(ctx, cgFont); + + qreal pos_x = -br.x.truncate() + subPixelPosition.toReal(); + qreal pos_y = im.height() + br.y.toReal(); + CGContextSetTextPosition(ctx, pos_x, pos_y); + + CGSize advance; + advance.width = 0; + advance.height = 0; + CGGlyph cgGlyph = glyph; + CGContextShowGlyphsWithAdvances(ctx, &cgGlyph, &advance, 1); + + if (synthesisFlags & QFontEngine::SynthesizedBold) { + CGContextSetTextPosition(ctx, pos_x + 0.5 * lineThickness().toReal(), pos_y); + CGContextShowGlyphsWithAdvances(ctx, &cgGlyph, &advance, 1); + } + + CGContextRelease(ctx); + + return im; +} + +QImage QCoreTextFontEngine::alphaMapForGlyph(glyph_t glyph, QFixed subPixelPosition) +{ + QImage im = imageForGlyph(glyph, subPixelPosition, 0, false); + + QImage indexed(im.width(), im.height(), QImage::Format_Indexed8); + QVector<QRgb> colors(256); + for (int i=0; i<256; ++i) + colors[i] = qRgba(0, 0, 0, i); + indexed.setColorTable(colors); + + for (int y=0; y<im.height(); ++y) { + uint *src = (uint*) im.scanLine(y); + uchar *dst = indexed.scanLine(y); + for (int x=0; x<im.width(); ++x) { + *dst = qGray(*src); + ++dst; + ++src; + } + } + + return indexed; +} + +QImage QCoreTextFontEngine::alphaRGBMapForGlyph(glyph_t glyph, QFixed subPixelPosition, int margin, const QTransform &x) +{ + if (x.type() >= QTransform::TxScale) + return QFontEngine::alphaRGBMapForGlyph(glyph, subPixelPosition, margin, x); + + QImage im = imageForGlyph(glyph, subPixelPosition, margin, true); + qGamma_correct_back_to_linear_cs(&im); + return im; +} + +void QCoreTextFontEngine::recalcAdvances(QGlyphLayout *glyphs, QTextEngine::ShaperFlags flags) const +{ + int i, numGlyphs = glyphs->numGlyphs; + QVarLengthArray<CGGlyph> cgGlyphs(numGlyphs); + + for (i = 0; i < numGlyphs; ++i) { + if (glyphs->glyphs[i] & 0xff000000) + cgGlyphs[i] = 0; + else + cgGlyphs[i] = glyphs->glyphs[i]; + } + + loadAdvancesForGlyphs(ctfont, cgGlyphs, glyphs, numGlyphs, flags, fontDef); +} + +QFontEngine::FaceId QCoreTextFontEngine::faceId() const +{ + return QFontEngine::FaceId(); +} + +bool QCoreTextFontEngine::canRender(const QChar *string, int len) +{ + QVarLengthArray<CGGlyph> cgGlyphs(len); + return CTFontGetGlyphsForCharacters(ctfont, (const UniChar *) string, cgGlyphs.data(), len); +} + +bool QCoreTextFontEngine::getSfntTableData(uint tag, uchar *buffer, uint *length) const +{ + QCFType<CFDataRef> table = CTFontCopyTable(ctfont, tag, 0); + if (!table || !length) + return false; + CFIndex tableLength = CFDataGetLength(table); + int availableLength = *length; + *length = tableLength; + if (buffer) { + if (tableLength > availableLength) + return false; + CFDataGetBytes(table, CFRangeMake(0, tableLength), buffer); + } + return true; +} + +void QCoreTextFontEngine::getUnscaledGlyph(glyph_t, QPainterPath *, glyph_metrics_t *) +{ + // ### +} + +QFixed QCoreTextFontEngine::emSquareSize() const +{ + return QFixed::QFixed(int(CTFontGetUnitsPerEm(ctfont))); +} + +QFontEngine *QCoreTextFontEngine::cloneWithSize(qreal pixelSize) const +{ + QFontDef newFontDef = fontDef; + newFontDef.pixelSize = pixelSize; + newFontDef.pointSize = pixelSize * 72.0 / qt_defaultDpi(); + + return new QCoreTextFontEngine(cgFont, newFontDef); +} + +QT_END_NAMESPACE + +#endif// !defined(Q_WS_MAC) || (MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_5) + |