/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia.  For licensing terms and
** conditions see http://qt.digia.com/licensing.  For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** 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, Digia gives you certain additional
** rights.  These rights are described in the Digia 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.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef QFONTENGINE_CORETEXT_P_H
#define QFONTENGINE_CORETEXT_P_H

#include <private/qfontengine_p.h>

#if defined(Q_OS_IOS)
#include <CoreText/CoreText.h>
#include <CoreGraphics/CoreGraphics.h>
#include <private/qcore_mac_p.h>
#endif

#if !defined(Q_WS_MAC) || (MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_5)

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

class QRawFontPrivate;
class QCoreTextFontEngineMulti;
class QCoreTextFontEngine : public QFontEngine
{
public:
    QCoreTextFontEngine(CTFontRef font, const QFontDef &def);
    QCoreTextFontEngine(CGFontRef font, const QFontDef &def);
    ~QCoreTextFontEngine();

    virtual bool stringToCMap(const QChar *str, int len, QGlyphLayout *glyphs, int *nglyphs, QTextEngine::ShaperFlags flags) const;
    virtual void recalcAdvances(QGlyphLayout *, QTextEngine::ShaperFlags) const;

    virtual glyph_metrics_t boundingBox(const QGlyphLayout &glyphs);
    virtual glyph_metrics_t boundingBox(glyph_t glyph);

    virtual QFixed ascent() const;
    virtual QFixed descent() const;
    virtual QFixed leading() const;
    virtual QFixed xHeight() const;
    virtual qreal maxCharWidth() const;
    virtual QFixed averageCharWidth() const;

    virtual void addGlyphsToPath(glyph_t *glyphs, QFixedPoint *positions, int numGlyphs,
                                 QPainterPath *path, QTextItem::RenderFlags);

    virtual const char *name() const { return "QCoreTextFontEngine"; }

    virtual bool canRender(const QChar *string, int len);

    virtual int synthesized() const { return synthesisFlags; }
    virtual bool supportsSubPixelPositions() const { return true; }

    virtual Type type() const { return QFontEngine::Mac; }

    void draw(CGContextRef ctx, qreal x, qreal y, const QTextItemInt &ti, int paintDeviceHeight);

    virtual FaceId faceId() const;
    virtual bool getSfntTableData(uint /*tag*/, uchar * /*buffer*/, uint * /*length*/) const;
    virtual void getUnscaledGlyph(glyph_t glyph, QPainterPath *path, glyph_metrics_t *metrics);
    virtual QImage alphaMapForGlyph(glyph_t, QFixed subPixelPosition);
    virtual QImage alphaRGBMapForGlyph(glyph_t, QFixed subPixelPosition, int margin, const QTransform &t);
    virtual qreal minRightBearing() const;
    virtual qreal minLeftBearing() const;
    virtual QFixed emSquareSize() const;

    virtual QFontEngine *cloneWithSize(qreal pixelSize) const;

private:
    friend class QRawFontPrivate;

    void init();
    QImage imageForGlyph(glyph_t glyph, QFixed subPixelPosition, int margin, bool colorful);
    CTFontRef ctfont;
    CGFontRef cgFont;
    int synthesisFlags;
    CGAffineTransform transform;
    QFixed avgCharWidth;
    friend class QCoreTextFontEngineMulti;
};

class QCoreTextFontEngineMulti : public QFontEngineMulti
{
public:
    QCoreTextFontEngineMulti(const QCFString &name, const QFontDef &fontDef, bool kerning);
    QCoreTextFontEngineMulti(CTFontRef ctFontRef, const QFontDef &fontDef, bool kerning);
    ~QCoreTextFontEngineMulti();

    virtual bool stringToCMap(const QChar *str, int len, QGlyphLayout *glyphs, int *nglyphs,
                              QTextEngine::ShaperFlags flags) const;
    bool stringToCMap(const QChar *str, int len, QGlyphLayout *glyphs, int *nglyphs,
                      QTextEngine::ShaperFlags flags,
                      unsigned short *logClusters, const HB_CharAttributes *charAttributes,
                      QScriptItem *si) const;

    virtual const char *name() const { return "CoreText"; }
    inline CTFontRef macFontID() const { return ctfont; }

protected:
    virtual void loadEngine(int at);

private:
    void init(bool kerning);
    inline const QCoreTextFontEngine *engineAt(int i) const
    { return static_cast<const QCoreTextFontEngine *>(engines.at(i)); }

    uint fontIndexForFont(CTFontRef font) const;
    CTFontRef ctfont;
    mutable QCFType<CFMutableDictionaryRef> attributeDict;
    CGAffineTransform transform;
    friend class QFontDialogPrivate;
    bool transformAdvances;
};

CGAffineTransform qt_transform_from_fontdef(const QFontDef &fontDef);

QT_END_NAMESPACE

QT_END_HEADER

#endif// !defined(Q_WS_MAC) || (MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_5)

#endif // QFONTENGINE_CORETEXT_P_H
