/****************************************************************************
**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtQuick module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL21$
** 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 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** 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.
**
** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef QSGDISTANCEFIELDGLYPHNODE_P_H
#define QSGDISTANCEFIELDGLYPHNODE_P_H

#include <private/qsgadaptationlayer_p.h>
#include <QtQuick/qsgtexture.h>

#include <QtQuick/private/qquicktext_p.h>

QT_BEGIN_NAMESPACE

class QSGRenderContext;
class QSGDistanceFieldGlyphCacheManager;
class QSGDistanceFieldTextMaterial;
class QSGDistanceFieldGlyphNode: public QSGGlyphNode, public QSGDistanceFieldGlyphConsumer
{
public:
    QSGDistanceFieldGlyphNode(QSGRenderContext *context);
    ~QSGDistanceFieldGlyphNode();

    virtual QPointF baseLine() const { return m_baseLine; }
    virtual void setGlyphs(const QPointF &position, const QGlyphRun &glyphs);
    virtual void setColor(const QColor &color);

    virtual void setPreferredAntialiasingMode(AntialiasingMode mode);

    virtual void setStyle(QQuickText::TextStyle style);
    virtual void setStyleColor(const QColor &color);

    virtual void update();
    void preprocess();

    void invalidateGlyphs(const QVector<quint32> &glyphs);

    void updateGeometry();

private:
    enum DistanceFieldGlyphNodeType {
        RootGlyphNode,
        SubGlyphNode
    };

    void setGlyphNodeType(DistanceFieldGlyphNodeType type) { m_glyphNodeType = type; }
    void updateMaterial();

    DistanceFieldGlyphNodeType m_glyphNodeType;
    QColor m_color;
    QPointF m_baseLine;
    QSGRenderContext *m_context;
    QSGDistanceFieldTextMaterial *m_material;
    QPointF m_originalPosition;
    QPointF m_position;
    QGlyphRun m_glyphs;
    QSGDistanceFieldGlyphCache *m_glyph_cache;
    QSGGeometry m_geometry;
    QQuickText::TextStyle m_style;
    QColor m_styleColor;
    AntialiasingMode m_antialiasingMode;
    QRectF m_boundingRect;
    const QSGDistanceFieldGlyphCache::Texture *m_texture;
    QLinkedList<QSGNode *> m_nodesToDelete;

    struct GlyphInfo {
        QVector<quint32> indexes;
        QVector<QPointF> positions;
    };
    QSet<quint32> m_allGlyphIndexesLookup;

    uint m_dirtyGeometry: 1;
    uint m_dirtyMaterial: 1;
};

QT_END_NAMESPACE

#endif
