/****************************************************************************+
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**+
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).+
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** All rights reserved.+
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** Contact: Nokia Corporation (qt-info@nokia.com)+
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**+
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** This file is part of the QtGui module of the Qt Toolkit.+
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**+
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** $QT_BEGIN_LICENSE:LGPL$+
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** No Commercial Usage+
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** This file contains pre-release code and may not be distributed.+
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** You may use this file in accordance with the terms and conditions+
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** contained in the Technology Preview License Agreement accompanying+
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** this package.+
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**+
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** GNU Lesser General Public License Usage+
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** Alternatively, this file may be used under the terms of the GNU Lesser+
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** General Public License version 2.1 as published by the Free Software+
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** Foundation and appearing in the file LICENSE.LGPL included in the+
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** packaging of this file.  Please review the following information to+
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** ensure the GNU Lesser General Public License version 2.1 requirements+
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.+
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**+
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** In addition, as a special exception, Nokia gives you certain additional+
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** rights.  These rights are described in the Nokia Qt LGPL Exception+
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.+
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** If you have questions regarding the use of this file, please contact+
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** Nokia at qt-info@nokia.com.+
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** $QT_END_LICENSE$+
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**+
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****************************************************************************/+
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+
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#ifndef QOUTLINEMAPPER_P_H+
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#define QOUTLINEMAPPER_P_H+
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+
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//+
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//  W A R N I N G+
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//  -------------+
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//+
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// This file is not part of the Qt API.  It exists purely as an+
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// implementation detail.  This header file may change from version to+
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// version without notice, or even be removed.+
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//+
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// We mean it.+
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//+
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+
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#include <QtCore/qrect.h>+
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+
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#include <QtGui/qtransform.h>+
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#include <QtGui/qpainterpath.h>+
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+
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#define QT_FT_BEGIN_HEADER+
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#define QT_FT_END_HEADER+
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+
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#include <private/qrasterdefs_p.h>+
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#include <private/qdatabuffer_p.h>+
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#include "qpaintengineex_p.h"+
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+
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QT_BEGIN_NAMESPACE+
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+
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// This limitations comes from qgrayraster.c. Any higher and+
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// rasterization of shapes will produce incorrect results.+
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const int QT_RASTER_COORD_LIMIT = 32767;+
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+
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//#define QT_DEBUG_CONVERT+
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+
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/********************************************************************************+
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 * class QOutlineMapper+
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 *+
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 * Used to map between QPainterPath and the QT_FT_Outline structure used by the+
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 * freetype scanconvertor.+
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 *+
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 * The outline mapper uses a path iterator to get points from the path,+
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 * so that it is possible to transform the points as they are converted. The+
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 * callback can be a noop, translate or full-fledged xform. (Tests indicated+
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 * that using a C callback was low cost).+
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 */+
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class QOutlineMapper+
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{+
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public:+
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    QOutlineMapper()+
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        : m_round_coords(false)+
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    {+
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    }+
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+
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    /*!+
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      Sets up the matrix to be used for conversion. This also+
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      sets up the qt_path_iterator function that is used as a callback+
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      to get points.+
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    */+
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    void setMatrix(const QTransform &m)+
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    {+
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        m_m11 = m.m11();+
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        m_m12 = m.m12();+
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        m_m13 = m.m13();+
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        m_m21 = m.m21();+
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        m_m22 = m.m22();+
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        m_m23 = m.m23();+
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        m_m33 = m.m33();+
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        m_dx = m.dx();+
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        m_dy = m.dy();+
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        m_txop = m.type();+
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    }+
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+
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    void beginOutline(Qt::FillRule fillRule)+
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    {+
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#ifdef QT_DEBUG_CONVERT+
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        printf("QOutlineMapper::beginOutline rule=%d\n", fillRule);+
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#endif+
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        m_valid = true;+
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        m_elements.reset();+
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        m_elements_dev.reset();+
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        m_element_types.reset();+
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        m_points.reset();+
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        m_tags.reset();+
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        m_contours.reset();+
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        m_outline.flags = fillRule == Qt::WindingFill+
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                          ? QT_FT_OUTLINE_NONE+
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                          : QT_FT_OUTLINE_EVEN_ODD_FILL;+
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        m_subpath_start = 0;+
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    }+
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+
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    void endOutline();+
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+
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    void clipElements(const QPointF *points, const QPainterPath::ElementType *types, int count);+
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+
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    void convertElements(const QPointF *points, const QPainterPath::ElementType *types, int count);+
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+
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    inline void moveTo(const QPointF &pt) {+
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#ifdef QT_DEBUG_CONVERT+
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        printf("QOutlineMapper::moveTo() (%f, %f)\n", pt.x(), pt.y());+
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#endif+
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        closeSubpath();+
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        m_subpath_start = m_elements.size();+
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        m_elements << pt;+
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        m_element_types << QPainterPath::MoveToElement;+
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    }+
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+
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    inline void lineTo(const QPointF &pt) {+
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#ifdef QT_DEBUG_CONVERT+
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        printf("QOutlineMapper::lineTo() (%f, %f)\n", pt.x(), pt.y());+
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#endif+
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        m_elements.add(pt);+
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        m_element_types << QPainterPath::LineToElement;+
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    }+
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+
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    inline void curveTo(const QPointF &cp1, const QPointF &cp2, const QPointF &ep) {+
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#ifdef QT_DEBUG_CONVERT+
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        printf("QOutlineMapper::curveTo() (%f, %f)\n", ep.x(), ep.y());+
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#endif+
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        m_elements << cp1 << cp2 << ep;+
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        m_element_types << QPainterPath::CurveToElement+
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                        << QPainterPath::CurveToDataElement+
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                        << QPainterPath::CurveToDataElement;+
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    }+
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+
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    inline void closeSubpath() {+
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        int element_count = m_elements.size();+
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        if (element_count > 0) {+
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            if (m_elements.at(element_count-1) != m_elements.at(m_subpath_start)) {+
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#ifdef QT_DEBUG_CONVERT+
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                printf(" - implicitly closing\n");+
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#endif+
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                // Put the object on the stack to avoid the odd case where+
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                // lineTo reallocs the databuffer and the QPointF & will+
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                // be invalidated.+
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                QPointF pt = m_elements.at(m_subpath_start);+
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+
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                // only do lineTo if we have element_type array...+
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                if (m_element_types.size())+
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                    lineTo(pt);+
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                else+
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                    m_elements << pt;+
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+
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            }+
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        }+
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    }+
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+
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    QT_FT_Outline *outline() {+
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        if (m_valid)+
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            return &m_outline;+
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        return 0;+
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    }+
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+
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    QT_FT_Outline *convertPath(const QPainterPath &path);+
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    QT_FT_Outline *convertPath(const QVectorPath &path);+
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+
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    void setCoordinateRounding(bool coordinateRounding) { m_round_coords = coordinateRounding; }+
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+
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    inline QPainterPath::ElementType *elementTypes() const { return m_element_types.size() == 0 ? 0 : m_element_types.data(); }+
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+
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public:+
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    QDataBuffer<QPainterPath::ElementType> m_element_types;+
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    QDataBuffer<QPointF> m_elements;+
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    QDataBuffer<QPointF> m_elements_dev;+
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    QDataBuffer<QT_FT_Vector> m_points;+
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    QDataBuffer<char> m_tags;+
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    QDataBuffer<int> m_contours;+
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+
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    QRect m_clip_rect;+
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    QDataBuffer<QPointF> m_polygon_dev;+
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+
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    QRectF controlPointRect; // only valid after endOutline()+
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+
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    QT_FT_Outline m_outline;+
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    uint m_txop;+
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+
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    int m_subpath_start;+
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+
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    // Matrix+
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    qreal m_m11;+
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    qreal m_m12;+
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    qreal m_m13;+
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    qreal m_m21;+
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    qreal m_m22;+
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    qreal m_m23;+
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    qreal m_m33;+
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    qreal m_dx;+
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    qreal m_dy;+
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+
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    bool m_valid;+
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+
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private:+
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    bool m_round_coords;+
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};+
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+
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QT_END_NAMESPACE+
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+
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#endif // QOUTLINEMAPPER_P_H+
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