diff options
Diffstat (limited to 'src/widgets/platforms/mac/qfontengine_mac.mm')
| -rw-r--r-- | src/widgets/platforms/mac/qfontengine_mac.mm | 1236 |
1 files changed, 1236 insertions, 0 deletions
diff --git a/src/widgets/platforms/mac/qfontengine_mac.mm b/src/widgets/platforms/mac/qfontengine_mac.mm new file mode 100644 index 0000000000..9f094ad7d1 --- /dev/null +++ b/src/widgets/platforms/mac/qfontengine_mac.mm @@ -0,0 +1,1236 @@ +/**************************************************************************** +** +** 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. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the Technology Preview License Agreement accompanying +** this package. +** +** GNU Lesser General Public License Usage +** Alternatively, 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. +** +** If you have questions regarding the use of this file, please contact +** Nokia at qt-info@nokia.com. +** +** +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#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> + +QT_BEGIN_NAMESPACE + +/***************************************************************************** + QFontEngine debug facilities + *****************************************************************************/ +//#define DEBUG_ADVANCES + +extern int qt_antialiasing_threshold; // QApplication.cpp + +#ifndef FixedToQFixed +#define FixedToQFixed(a) QFixed::fromFixed((a) >> 10) +#define QFixedToFixed(x) ((x).value() << 10) +#endif + +class QMacFontPath +{ + float x, y; + QPainterPath *path; +public: + inline QMacFontPath(float _x, float _y, QPainterPath *_path) : x(_x), y(_y), path(_path) { } + inline void setPosition(float _x, float _y) { x = _x; y = _y; } + inline void advance(float _x) { x += _x; } + static OSStatus lineTo(const Float32Point *, void *); + static OSStatus cubicTo(const Float32Point *, const Float32Point *, + const Float32Point *, void *); + static OSStatus moveTo(const Float32Point *, void *); + static OSStatus closePath(void *); +}; + +OSStatus QMacFontPath::lineTo(const Float32Point *pt, void *data) + +{ + QMacFontPath *p = static_cast<QMacFontPath*>(data); + p->path->lineTo(p->x + pt->x, p->y + pt->y); + return noErr; +} + +OSStatus QMacFontPath::cubicTo(const Float32Point *cp1, const Float32Point *cp2, + const Float32Point *ep, void *data) + +{ + QMacFontPath *p = static_cast<QMacFontPath*>(data); + p->path->cubicTo(p->x + cp1->x, p->y + cp1->y, + p->x + cp2->x, p->y + cp2->y, + p->x + ep->x, p->y + ep->y); + return noErr; +} + +OSStatus QMacFontPath::moveTo(const Float32Point *pt, void *data) +{ + QMacFontPath *p = static_cast<QMacFontPath*>(data); + p->path->moveTo(p->x + pt->x, p->y + pt->y); + return noErr; +} + +OSStatus QMacFontPath::closePath(void *data) +{ + static_cast<QMacFontPath*>(data)->path->closeSubpath(); + return noErr; +} + + +#ifndef QT_MAC_USE_COCOA +QFontEngineMacMulti::QFontEngineMacMulti(const ATSFontFamilyRef &atsFamily, const ATSFontRef &atsFontRef, const QFontDef &fontDef, bool kerning) + : QFontEngineMulti(0) +{ + this->fontDef = fontDef; + this->kerning = kerning; + + // hopefully (CTFontCreateWithName or CTFontCreateWithFontDescriptor) + CTFontCreateCopyWithSymbolicTraits + // (or CTFontCreateWithQuickdrawInstance) + FMFontFamily fmFamily; + FMFontStyle fntStyle = 0; + fmFamily = FMGetFontFamilyFromATSFontFamilyRef(atsFamily); + if (fmFamily == kInvalidFontFamily) { + // Use the ATSFont then... + fontID = FMGetFontFromATSFontRef(atsFontRef); + } else { + if (fontDef.weight >= QFont::Bold) + fntStyle |= ::bold; + if (fontDef.style != QFont::StyleNormal) + fntStyle |= ::italic; + + FMFontStyle intrinsicStyle; + FMFont fnt = 0; + if (FMGetFontFromFontFamilyInstance(fmFamily, fntStyle, &fnt, &intrinsicStyle) == noErr) + fontID = FMGetATSFontRefFromFont(fnt); + } + + // CFDictionaryRef, <CTStringAttributes.h> + OSStatus status; + + status = ATSUCreateTextLayout(&textLayout); + Q_ASSERT(status == noErr); + + const int maxAttributeCount = 5; + ATSUAttributeTag tags[maxAttributeCount + 1]; + ByteCount sizes[maxAttributeCount + 1]; + ATSUAttributeValuePtr values[maxAttributeCount + 1]; + int attributeCount = 0; + + Fixed size = FixRatio(fontDef.pixelSize, 1); + tags[attributeCount] = kATSUSizeTag; + sizes[attributeCount] = sizeof(size); + values[attributeCount] = &size; + ++attributeCount; + + tags[attributeCount] = kATSUFontTag; + sizes[attributeCount] = sizeof(fontID); + values[attributeCount] = &this->fontID; + ++attributeCount; + + transform = CGAffineTransformIdentity; + if (fontDef.stretch != 100) { + transform = CGAffineTransformMakeScale(float(fontDef.stretch) / float(100), 1); + tags[attributeCount] = kATSUFontMatrixTag; + sizes[attributeCount] = sizeof(transform); + values[attributeCount] = &transform; + ++attributeCount; + } + + status = ATSUCreateStyle(&style); + Q_ASSERT(status == noErr); + + Q_ASSERT(attributeCount < maxAttributeCount + 1); + status = ATSUSetAttributes(style, attributeCount, tags, sizes, values); + Q_ASSERT(status == noErr); + + QFontEngineMac *fe = new QFontEngineMac(style, fontID, fontDef, this); + fe->ref.ref(); + engines.append(fe); +} + +QFontEngineMacMulti::~QFontEngineMacMulti() +{ + ATSUDisposeTextLayout(textLayout); + ATSUDisposeStyle(style); + + for (int i = 0; i < engines.count(); ++i) { + QFontEngineMac *fe = const_cast<QFontEngineMac *>(static_cast<const QFontEngineMac *>(engines.at(i))); + fe->multiEngine = 0; + if (!fe->ref.deref()) + delete fe; + } + engines.clear(); +} + +struct QGlyphLayoutInfo +{ + QGlyphLayout *glyphs; + int *numGlyphs; + bool callbackCalled; + int *mappedFonts; + QTextEngine::ShaperFlags flags; + QFontEngineMacMulti::ShaperItem *shaperItem; + unsigned int styleStrategy; +}; + +static OSStatus atsuPostLayoutCallback(ATSULayoutOperationSelector selector, ATSULineRef lineRef, URefCon refCon, + void *operationExtraParameter, ATSULayoutOperationCallbackStatus *callbackStatus) +{ + 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].unicode() >= 0xd800 && str[i].unicode() < 0xdc00 + && str[i+1].unicode() >= 0xdc00 && str[i+1].unicode() < 0xe000); + } +#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.unicode() >= 0xd800 && current.unicode() < 0xdc00 + && next.unicode() >= 0xdc00 && next.unicode() < 0xe000) { + 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; +} + +int QFontEngineMacMulti::fontIndexForFontID(ATSUFontID id) const +{ + for (int i = 0; i < engines.count(); ++i) { + if (engineAt(i)->fontID == id) + return i; + } + + QFontEngineMacMulti *that = const_cast<QFontEngineMacMulti *>(this); + QFontEngineMac *fe = new QFontEngineMac(style, id, fontDef, that); + fe->ref.ref(); + that->engines.append(fe); + return engines.count() - 1; +} + +bool QFontEngineMacMulti::stringToCMap(const QChar *str, int len, QGlyphLayout *glyphs, int *nglyphs, QTextEngine::ShaperFlags flags) const +{ + return stringToCMap(str, len, glyphs, nglyphs, flags, /*logClusters=*/0, /*charAttributes=*/0); +} + +bool QFontEngineMacMulti::stringToCMap(const QChar *str, int len, QGlyphLayout *glyphs, int *nglyphs, QTextEngine::ShaperFlags flags, + unsigned short *logClusters, const HB_CharAttributes *charAttributes, QScriptItem *) const +{ + if (*nglyphs < len) { + *nglyphs = len; + return false; + } + + ShaperItem shaperItem; + shaperItem.string = str; + shaperItem.from = 0; + shaperItem.length = len; + shaperItem.glyphs = *glyphs; + shaperItem.glyphs.numGlyphs = *nglyphs; + shaperItem.flags = flags; + shaperItem.log_clusters = logClusters; + shaperItem.charAttributes = charAttributes; + + const int maxChars = qMax(1, + int(SHRT_MAX / maxCharWidth()) + - 10 // subtract a few to be on the safe side + ); + if (len < maxChars || !charAttributes) + return stringToCMapInternal(str, len, glyphs, nglyphs, flags, &shaperItem); + + int charIdx = 0; + int glyphIdx = 0; + ShaperItem tmpItem = shaperItem; + + do { + tmpItem.from = shaperItem.from + charIdx; + + int charCount = qMin(maxChars, len - charIdx); + + int lastWhitespace = tmpItem.from + charCount - 1; + int lastSoftBreak = lastWhitespace; + int lastCharStop = lastSoftBreak; + for (int i = lastCharStop; i >= tmpItem.from; --i) { + if (tmpItem.charAttributes[i].whiteSpace) { + lastWhitespace = i; + break; + } if (tmpItem.charAttributes[i].lineBreakType != HB_NoBreak) { + lastSoftBreak = i; + } if (tmpItem.charAttributes[i].charStop) { + lastCharStop = i; + } + } + charCount = qMin(lastWhitespace, qMin(lastSoftBreak, lastCharStop)) - tmpItem.from + 1; + + int glyphCount = shaperItem.glyphs.numGlyphs - glyphIdx; + if (glyphCount <= 0) + return false; + tmpItem.length = charCount; + tmpItem.glyphs = shaperItem.glyphs.mid(glyphIdx, glyphCount); + tmpItem.log_clusters = shaperItem.log_clusters + charIdx; + if (!stringToCMapInternal(tmpItem.string + tmpItem.from, tmpItem.length, + &tmpItem.glyphs, &glyphCount, flags, + &tmpItem)) { + *nglyphs = glyphIdx + glyphCount; + return false; + } + for (int i = 0; i < charCount; ++i) + tmpItem.log_clusters[i] += glyphIdx; + glyphIdx += glyphCount; + charIdx += charCount; + } while (charIdx < len); + *nglyphs = glyphIdx; + glyphs->numGlyphs = glyphIdx; + + return true; +} + +bool QFontEngineMacMulti::stringToCMapInternal(const QChar *str, int len, QGlyphLayout *glyphs, int *nglyphs, QTextEngine::ShaperFlags flags,ShaperItem *shaperItem) const +{ + //qDebug() << "stringToCMap" << QString(str, len); + + OSStatus e = noErr; + + e = ATSUSetTextPointerLocation(textLayout, (UniChar *)(str), 0, len, len); + if (e != noErr) { + qWarning("Qt: internal: %ld: Error ATSUSetTextPointerLocation %s: %d", long(e), __FILE__, __LINE__); + return false; + } + + QGlyphLayoutInfo nfo; + nfo.glyphs = glyphs; + nfo.numGlyphs = nglyphs; + nfo.callbackCalled = false; + nfo.flags = flags; + nfo.shaperItem = shaperItem; + nfo.styleStrategy = fontDef.styleStrategy; + + int prevNumGlyphs = *nglyphs; + + QVarLengthArray<int> mappedFonts(len); + for (int i = 0; i < len; ++i) + mappedFonts[i] = 0; + nfo.mappedFonts = mappedFonts.data(); + + Q_ASSERT(sizeof(void *) <= sizeof(URefCon)); + e = ATSUSetTextLayoutRefCon(textLayout, (URefCon)&nfo); + if (e != noErr) { + qWarning("Qt: internal: %ld: Error ATSUSetTextLayoutRefCon %s: %d", long(e), __FILE__, __LINE__); + return false; + } + + { + const int maxAttributeCount = 3; + ATSUAttributeTag tags[maxAttributeCount + 1]; + ByteCount sizes[maxAttributeCount + 1]; + ATSUAttributeValuePtr values[maxAttributeCount + 1]; + int attributeCount = 0; + + tags[attributeCount] = kATSULineLayoutOptionsTag; + ATSLineLayoutOptions layopts = kATSLineHasNoOpticalAlignment + | kATSLineIgnoreFontLeading + | kATSLineNoSpecialJustification // we do kashidas ourselves + | kATSLineDisableAllJustification + ; + + if (fontDef.styleStrategy & QFont::NoAntialias) + layopts |= kATSLineNoAntiAliasing; + + if (!kerning) + layopts |= kATSLineDisableAllKerningAdjustments; + + values[attributeCount] = &layopts; + sizes[attributeCount] = sizeof(layopts); + ++attributeCount; + + tags[attributeCount] = kATSULayoutOperationOverrideTag; + ATSULayoutOperationOverrideSpecifier spec; + spec.operationSelector = kATSULayoutOperationPostLayoutAdjustment; + spec.overrideUPP = atsuPostLayoutCallback; + values[attributeCount] = &spec; + sizes[attributeCount] = sizeof(spec); + ++attributeCount; + + // CTWritingDirection + Boolean direction; + if (flags & QTextEngine::RightToLeft) + direction = kATSURightToLeftBaseDirection; + else + direction = kATSULeftToRightBaseDirection; + tags[attributeCount] = kATSULineDirectionTag; + values[attributeCount] = &direction; + sizes[attributeCount] = sizeof(direction); + ++attributeCount; + + Q_ASSERT(attributeCount < maxAttributeCount + 1); + e = ATSUSetLayoutControls(textLayout, attributeCount, tags, sizes, values); + if (e != noErr) { + qWarning("Qt: internal: %ld: Error ATSUSetLayoutControls %s: %d", long(e), __FILE__, __LINE__); + return false; + } + + } + + e = ATSUSetRunStyle(textLayout, style, 0, len); + if (e != noErr) { + qWarning("Qt: internal: %ld: Error ATSUSetRunStyle %s: %d", long(e), __FILE__, __LINE__); + return false; + } + + if (!(fontDef.styleStrategy & QFont::NoFontMerging)) { + int pos = 0; + do { + ATSUFontID substFont = 0; + UniCharArrayOffset changedOffset = 0; + UniCharCount changeCount = 0; + + e = ATSUMatchFontsToText(textLayout, pos, len - pos, + &substFont, &changedOffset, + &changeCount); + if (e == kATSUFontsMatched) { + int fontIdx = fontIndexForFontID(substFont); + for (uint i = 0; i < changeCount; ++i) + mappedFonts[changedOffset + i] = fontIdx; + pos = changedOffset + changeCount; + ATSUSetRunStyle(textLayout, engineAt(fontIdx)->style, changedOffset, changeCount); + } else if (e == kATSUFontsNotMatched) { + pos = changedOffset + changeCount; + } + } while (pos < len && e != noErr); + } + { // trigger the a layout + // CFAttributedStringCreate, CTFramesetterCreateWithAttributedString (or perhaps Typesetter) + Rect rect; + e = ATSUMeasureTextImage(textLayout, kATSUFromTextBeginning, kATSUToTextEnd, + /*iLocationX =*/ 0, /*iLocationY =*/ 0, + &rect); + if (e != noErr) { + qWarning("Qt: internal: %ld: Error ATSUMeasureTextImage %s: %d", long(e), __FILE__, __LINE__); + return false; + } + } + + if (!nfo.callbackCalled) { + qWarning("Qt: internal: %ld: Error ATSUMeasureTextImage did not trigger callback %s: %d", long(e), __FILE__, __LINE__); + return false; + } + + ATSUClearLayoutCache(textLayout, kATSUFromTextBeginning); + if (prevNumGlyphs < *nfo.numGlyphs) + return false; + return true; +} + +void QFontEngineMacMulti::recalcAdvances(QGlyphLayout *glyphs, QTextEngine::ShaperFlags flags) const +{ + Q_ASSERT(false); + Q_UNUSED(glyphs); + Q_UNUSED(flags); +} + +void QFontEngineMacMulti::doKerning(QGlyphLayout *, QTextEngine::ShaperFlags) const +{ + //Q_ASSERT(false); +} + +void QFontEngineMacMulti::loadEngine(int /*at*/) +{ + // should never be called! + Q_ASSERT(false); +} + +bool QFontEngineMacMulti::canRender(const QChar *string, int len) +{ + ATSUSetTextPointerLocation(textLayout, reinterpret_cast<const UniChar *>(string), 0, len, len); + ATSUSetRunStyle(textLayout, style, 0, len); + + OSStatus e = noErr; + int pos = 0; + do { + FMFont substFont = 0; + UniCharArrayOffset changedOffset = 0; + UniCharCount changeCount = 0; + + // CTFontCreateForString + e = ATSUMatchFontsToText(textLayout, pos, len - pos, + &substFont, &changedOffset, + &changeCount); + if (e == kATSUFontsMatched) { + pos = changedOffset + changeCount; + } else if (e == kATSUFontsNotMatched) { + break; + } + } while (pos < len && e != noErr); + + return e == noErr || e == kATSUFontsMatched; +} + +QFontEngineMac::QFontEngineMac(ATSUStyle baseStyle, ATSUFontID fontID, const QFontDef &def, QFontEngineMacMulti *multiEngine) + : fontID(fontID), multiEngine(multiEngine), cmap(0), symbolCMap(false) +{ + fontDef = def; + ATSUCreateAndCopyStyle(baseStyle, &style); + ATSFontRef atsFont = FMGetATSFontRefFromFont(fontID); + cgFont = CGFontCreateWithPlatformFont(&atsFont); + + const int maxAttributeCount = 4; + ATSUAttributeTag tags[maxAttributeCount + 1]; + ByteCount sizes[maxAttributeCount + 1]; + ATSUAttributeValuePtr values[maxAttributeCount + 1]; + int attributeCount = 0; + + synthesisFlags = 0; + + // synthesizing using CG is not recommended + quint16 macStyle = 0; + { + uchar data[4]; + ByteCount len = 4; + if (ATSFontGetTable(atsFont, MAKE_TAG('h', 'e', 'a', 'd'), 44, 4, &data, &len) == noErr) + macStyle = qFromBigEndian<quint16>(data); + } + + Boolean atsuBold = false; + Boolean atsuItalic = false; + if (fontDef.weight >= QFont::Bold) { + if (!(macStyle & 1)) { + synthesisFlags |= SynthesizedBold; + atsuBold = true; + tags[attributeCount] = kATSUQDBoldfaceTag; + sizes[attributeCount] = sizeof(atsuBold); + values[attributeCount] = &atsuBold; + ++attributeCount; + } + } + if (fontDef.style != QFont::StyleNormal) { + if (!(macStyle & 2)) { + synthesisFlags |= SynthesizedItalic; + atsuItalic = true; + tags[attributeCount] = kATSUQDItalicTag; + sizes[attributeCount] = sizeof(atsuItalic); + values[attributeCount] = &atsuItalic; + ++attributeCount; + } + } + + tags[attributeCount] = kATSUFontTag; + values[attributeCount] = &fontID; + sizes[attributeCount] = sizeof(fontID); + ++attributeCount; + + Q_ASSERT(attributeCount < maxAttributeCount + 1); + OSStatus err = ATSUSetAttributes(style, attributeCount, tags, sizes, values); + Q_ASSERT(err == noErr); + Q_UNUSED(err); + + // CTFontCopyTable + quint16 tmpFsType; + if (ATSFontGetTable(atsFont, MAKE_TAG('O', 'S', '/', '2'), 8, 2, &tmpFsType, 0) == noErr) + fsType = qFromBigEndian<quint16>(tmpFsType); + else + fsType = 0; + + if (multiEngine) + transform = multiEngine->transform; + else + transform = CGAffineTransformIdentity; + + ATSUTextMeasurement metric; + + ATSUGetAttribute(style, kATSUAscentTag, sizeof(metric), &metric, 0); + m_ascent = FixRound(metric); + + ATSUGetAttribute(style, kATSUDescentTag, sizeof(metric), &metric, 0); + m_descent = FixRound(metric); + + ATSUGetAttribute(style, kATSULeadingTag, sizeof(metric), &metric, 0); + m_leading = FixRound(metric); + + ATSFontMetrics metrics; + + ATSFontGetHorizontalMetrics(FMGetATSFontRefFromFont(fontID), kATSOptionFlagsDefault, &metrics); + m_maxCharWidth = metrics.maxAdvanceWidth * fontDef.pointSize; + + ATSFontGetHorizontalMetrics(FMGetATSFontRefFromFont(fontID), kATSOptionFlagsDefault, &metrics); + m_xHeight = QFixed::fromReal(metrics.xHeight * fontDef.pointSize); + + ATSFontGetHorizontalMetrics(FMGetATSFontRefFromFont(fontID), kATSOptionFlagsDefault, &metrics); + m_averageCharWidth = QFixed::fromReal(metrics.avgAdvanceWidth * fontDef.pointSize); + + // Use width of 'X' if ATSFontGetHorizontalMetrics returns 0 for avgAdvanceWidth. + if (m_averageCharWidth == QFixed(0)) { + QChar c('X'); + QGlyphLayoutArray<1> glyphs; + int nglyphs = 1; + stringToCMap(&c, 1, &glyphs, &nglyphs, 0); + glyph_metrics_t metrics = boundingBox(glyphs); + m_averageCharWidth = metrics.width; + } +} + +QFontEngineMac::~QFontEngineMac() +{ + ATSUDisposeStyle(style); +} + +static inline unsigned int getChar(const QChar *str, int &i, const int len) +{ + unsigned int uc = str[i].unicode(); + if (uc >= 0xd800 && uc < 0xdc00 && i < len-1) { + uint low = str[i+1].unicode(); + if (low >= 0xdc00 && low < 0xe000) { + uc = (uc - 0xd800)*0x400 + (low - 0xdc00) + 0x10000; + ++i; + } + } + return uc; +} + +// Not used directly for shaping, only used to calculate m_averageCharWidth +bool QFontEngineMac::stringToCMap(const QChar *str, int len, QGlyphLayout *glyphs, int *nglyphs, QTextEngine::ShaperFlags flags) const +{ + if (!cmap) { + cmapTable = getSfntTable(MAKE_TAG('c', 'm', 'a', 'p')); + int size = 0; + cmap = getCMap(reinterpret_cast<const uchar *>(cmapTable.constData()), cmapTable.size(), &symbolCMap, &size); + if (!cmap) + return false; + } + if (symbolCMap) { + for (int i = 0; i < len; ++i) { + unsigned int uc = getChar(str, i, len); + glyphs->glyphs[i] = getTrueTypeGlyphIndex(cmap, uc); + if(!glyphs->glyphs[i] && uc < 0x100) + glyphs->glyphs[i] = getTrueTypeGlyphIndex(cmap, uc + 0xf000); + } + } else { + for (int i = 0; i < len; ++i) { + unsigned int uc = getChar(str, i, len); + glyphs->glyphs[i] = getTrueTypeGlyphIndex(cmap, uc); + } + } + + *nglyphs = len; + glyphs->numGlyphs = *nglyphs; + + if (!(flags & QTextEngine::GlyphIndicesOnly)) + recalcAdvances(glyphs, flags); + + return true; +} + +void QFontEngineMac::recalcAdvances(QGlyphLayout *glyphs, QTextEngine::ShaperFlags flags) const +{ + Q_UNUSED(flags) + + QVarLengthArray<GlyphID> atsuGlyphs(glyphs->numGlyphs); + for (int i = 0; i < glyphs->numGlyphs; ++i) + atsuGlyphs[i] = glyphs->glyphs[i]; + + QVarLengthArray<ATSGlyphScreenMetrics> metrics(glyphs->numGlyphs); + + ATSUGlyphGetScreenMetrics(style, glyphs->numGlyphs, atsuGlyphs.data(), sizeof(GlyphID), + /* iForcingAntiAlias =*/ false, + /* iAntiAliasSwitch =*/true, + metrics.data()); + + for (int i = 0; i < glyphs->numGlyphs; ++i) { + glyphs->advances_x[i] = QFixed::fromReal(metrics[i].deviceAdvance.x); + glyphs->advances_y[i] = QFixed::fromReal(metrics[i].deviceAdvance.y); + + if (fontDef.styleStrategy & QFont::ForceIntegerMetrics) { + glyphs->advances_x[i] = glyphs->advances_x[i].round(); + glyphs->advances_y[i] = glyphs->advances_y[i].round(); + } + } +} + +glyph_metrics_t QFontEngineMac::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 QFontEngineMac::boundingBox(glyph_t glyph) +{ + GlyphID atsuGlyph = glyph; + + ATSGlyphScreenMetrics metrics; + + ATSUGlyphGetScreenMetrics(style, 1, &atsuGlyph, 0, + /* iForcingAntiAlias =*/ false, + /* iAntiAliasSwitch =*/true, + &metrics); + + // ### check again + + glyph_metrics_t gm; + gm.width = int(metrics.width); + gm.height = int(metrics.height); + gm.x = QFixed::fromReal(metrics.topLeft.x); + gm.y = -QFixed::fromReal(metrics.topLeft.y); + gm.xoff = QFixed::fromReal(metrics.deviceAdvance.x); + gm.yoff = QFixed::fromReal(metrics.deviceAdvance.y); + + if (fontDef.styleStrategy & QFont::ForceIntegerMetrics) { + gm.x = gm.x.floor(); + gm.y = gm.y.floor(); + gm.xoff = gm.xoff.round(); + gm.yoff = gm.yoff.round(); + } + + return gm; +} + +QFixed QFontEngineMac::ascent() const +{ + return (fontDef.styleStrategy & QFont::ForceIntegerMetrics) + ? m_ascent.round() + : m_ascent; +} + +QFixed QFontEngineMac::descent() const +{ + // subtract a pixel to even out the historical +1 in QFontMetrics::height(). + // Fix in Qt 5. + return (fontDef.styleStrategy & QFont::ForceIntegerMetrics) + ? m_descent.round() - 1 + : m_descent; +} + +QFixed QFontEngineMac::leading() const +{ + return (fontDef.styleStrategy & QFont::ForceIntegerMetrics) + ? m_leading.round() + : m_leading; +} + +qreal QFontEngineMac::maxCharWidth() const +{ + return (fontDef.styleStrategy & QFont::ForceIntegerMetrics) + ? qRound(m_maxCharWidth) + : m_maxCharWidth; +} + +QFixed QFontEngineMac::xHeight() const +{ + return (fontDef.styleStrategy & QFont::ForceIntegerMetrics) + ? m_xHeight.round() + : m_xHeight; +} + +QFixed QFontEngineMac::averageCharWidth() const +{ + return (fontDef.styleStrategy & QFont::ForceIntegerMetrics) + ? m_averageCharWidth.round() + : m_averageCharWidth; +} + +static void addGlyphsToPathHelper(ATSUStyle style, glyph_t *glyphs, QFixedPoint *positions, int numGlyphs, QPainterPath *path) +{ + 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); +} + +void QFontEngineMac::addGlyphsToPath(glyph_t *glyphs, QFixedPoint *positions, int numGlyphs, QPainterPath *path, + QTextItem::RenderFlags) +{ + addGlyphsToPathHelper(style, glyphs, positions, numGlyphs, path); +} + + +/*! + Helper function for alphaMapForGlyph and alphaRGBMapForGlyph. The two are identical, except for + the subpixel antialiasing... +*/ +QImage QFontEngineMac::imageForGlyph(glyph_t glyph, int margin, bool colorful) +{ + const glyph_metrics_t br = boundingBox(glyph); + QImage im(qRound(br.width)+2, qRound(br.height)+4, QImage::Format_RGB32); + im.fill(0xff000000); + + CGColorSpaceRef colorspace = QCoreGraphicsPaintEngine::macGenericColorSpace(); + 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, fontDef.pointSize > qt_antialiasing_threshold && !(fontDef.styleStrategy & QFont::NoAntialias)); + // turn off sub-pixel hinting - no support for that in OpenGL + CGContextSetShouldSmoothFonts(ctx, colorful); + 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, tanf(14 * acosf(0) / 90), 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.toReal() + 1; + qreal pos_y = im.height() + br.y.toReal() - 2; + 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 QFontEngineMac::alphaMapForGlyph(glyph_t glyph) +{ + QImage im = imageForGlyph(glyph, 2, 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 QFontEngineMac::alphaRGBMapForGlyph(glyph_t glyph, QFixed, int margin, const QTransform &t) +{ + QImage im = imageForGlyph(glyph, margin, true); + + if (t.type() >= QTransform::TxScale) { + im = im.transformed(t); + } + + qGamma_correct_back_to_linear_cs(&im); + + return im; +} + + +bool QFontEngineMac::canRender(const QChar *string, int len) +{ + Q_ASSERT(false); + Q_UNUSED(string); + Q_UNUSED(len); + return false; +} + +void QFontEngineMac::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, -tanf(14 * acosf(0) / 90), 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); + + 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); +} + +QFontEngine::FaceId QFontEngineMac::faceId() const +{ + FaceId ret; +#if (MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_5) +if (QSysInfo::MacintoshVersion >= QSysInfo::MV_10_5) { + // CTFontGetPlatformFont + FSRef ref; + if (ATSFontGetFileReference(FMGetATSFontRefFromFont(fontID), &ref) != noErr) + return ret; + ret.filename = QByteArray(128, 0); + ret.index = fontID; + FSRefMakePath(&ref, (UInt8 *)ret.filename.data(), ret.filename.size()); +}else +#endif +{ + FSSpec spec; + if (ATSFontGetFileSpecification(FMGetATSFontRefFromFont(fontID), &spec) != noErr) + return ret; + + FSRef ref; + FSpMakeFSRef(&spec, &ref); + ret.filename = QByteArray(128, 0); + ret.index = fontID; + FSRefMakePath(&ref, (UInt8 *)ret.filename.data(), ret.filename.size()); +} + return ret; +} + +QByteArray QFontEngineMac::getSfntTable(uint tag) const +{ + ATSFontRef atsFont = FMGetATSFontRefFromFont(fontID); + + ByteCount length; + OSStatus status = ATSFontGetTable(atsFont, tag, 0, 0, 0, &length); + if (status != noErr) + return QByteArray(); + QByteArray table(length, 0); + // CTFontCopyTable + status = ATSFontGetTable(atsFont, tag, 0, table.length(), table.data(), &length); + if (status != noErr) + return QByteArray(); + return table; +} + +QFontEngine::Properties QFontEngineMac::properties() const +{ + QFontEngine::Properties props; + ATSFontRef atsFont = FMGetATSFontRefFromFont(fontID); + quint16 tmp; + // CTFontGetUnitsPerEm + if (ATSFontGetTable(atsFont, MAKE_TAG('h', 'e', 'a', 'd'), 18, 2, &tmp, 0) == noErr) + props.emSquare = qFromBigEndian<quint16>(tmp); + struct { + qint16 xMin; + qint16 yMin; + qint16 xMax; + qint16 yMax; + } bbox; + bbox.xMin = bbox.xMax = bbox.yMin = bbox.yMax = 0; + // CTFontGetBoundingBox + if (ATSFontGetTable(atsFont, MAKE_TAG('h', 'e', 'a', 'd'), 36, 8, &bbox, 0) == noErr) { + bbox.xMin = qFromBigEndian<quint16>(bbox.xMin); + bbox.yMin = qFromBigEndian<quint16>(bbox.yMin); + bbox.xMax = qFromBigEndian<quint16>(bbox.xMax); + bbox.yMax = qFromBigEndian<quint16>(bbox.yMax); + } + struct { + qint16 ascender; + qint16 descender; + qint16 linegap; + } metrics; + metrics.ascender = metrics.descender = metrics.linegap = 0; + // CTFontGetAscent, etc. + if (ATSFontGetTable(atsFont, MAKE_TAG('h', 'h', 'e', 'a'), 4, 6, &metrics, 0) == noErr) { + metrics.ascender = qFromBigEndian<quint16>(metrics.ascender); + metrics.descender = qFromBigEndian<quint16>(metrics.descender); + metrics.linegap = qFromBigEndian<quint16>(metrics.linegap); + } + props.ascent = metrics.ascender; + props.descent = -metrics.descender; + props.leading = metrics.linegap; + props.boundingBox = QRectF(bbox.xMin, -bbox.yMax, + bbox.xMax - bbox.xMin, + bbox.yMax - bbox.yMin); + props.italicAngle = 0; + props.capHeight = props.ascent; + + qint16 lw = 0; + // fonts lie + if (ATSFontGetTable(atsFont, MAKE_TAG('p', 'o', 's', 't'), 10, 2, &lw, 0) == noErr) + lw = qFromBigEndian<quint16>(lw); + props.lineWidth = lw; + + // CTFontCopyPostScriptName + QCFString psName; + if (ATSFontGetPostScriptName(FMGetATSFontRefFromFont(fontID), kATSOptionFlagsDefault, &psName) == noErr) + props.postscriptName = QString(psName).toUtf8(); + props.postscriptName = QFontEngine::convertToPostscriptFontFamilyName(props.postscriptName); + return props; +} + +void QFontEngineMac::getUnscaledGlyph(glyph_t glyph, QPainterPath *path, glyph_metrics_t *metrics) +{ + ATSUStyle unscaledStyle; + ATSUCreateAndCopyStyle(style, &unscaledStyle); + + int emSquare = properties().emSquare.toInt(); + + const int maxAttributeCount = 4; + ATSUAttributeTag tags[maxAttributeCount + 1]; + ByteCount sizes[maxAttributeCount + 1]; + ATSUAttributeValuePtr values[maxAttributeCount + 1]; + int attributeCount = 0; + + Fixed size = FixRatio(emSquare, 1); + tags[attributeCount] = kATSUSizeTag; + sizes[attributeCount] = sizeof(size); + values[attributeCount] = &size; + ++attributeCount; + + Q_ASSERT(attributeCount < maxAttributeCount + 1); + OSStatus err = ATSUSetAttributes(unscaledStyle, attributeCount, tags, sizes, values); + Q_ASSERT(err == noErr); + Q_UNUSED(err); + + // various CTFont metrics functions: CTFontGetBoundingRectsForGlyphs, CTFontGetAdvancesForGlyphs + GlyphID atsuGlyph = glyph; + ATSGlyphScreenMetrics atsuMetrics; + ATSUGlyphGetScreenMetrics(unscaledStyle, 1, &atsuGlyph, 0, + /* iForcingAntiAlias =*/ false, + /* iAntiAliasSwitch =*/true, + &atsuMetrics); + + metrics->width = int(atsuMetrics.width); + metrics->height = int(atsuMetrics.height); + metrics->x = QFixed::fromReal(atsuMetrics.topLeft.x); + metrics->y = -QFixed::fromReal(atsuMetrics.topLeft.y); + metrics->xoff = QFixed::fromReal(atsuMetrics.deviceAdvance.x); + metrics->yoff = QFixed::fromReal(atsuMetrics.deviceAdvance.y); + + QFixedPoint p; + addGlyphsToPathHelper(unscaledStyle, &glyph, &p, 1, path); + + ATSUDisposeStyle(unscaledStyle); +} +#endif // !QT_MAC_USE_COCOA + +QT_END_NAMESPACE |