/****************************************************************************
**
** Copyright (C) 2013 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.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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
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** use the contact form at http://qt.digia.com/contact-us.
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** 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
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** rights.  These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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** 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
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****************************************************************************/

#include "qqmlparserstatus.h"

#include <QtQuick/qtquickglobal.h>
#include <QtGui/qcolor.h>
#include <QtCore/qobject.h>
#include <QtCore/qsize.h>
#include <QtCore/qvariant.h>
#include <QtGui/qopenglfunctions.h>

#ifndef QQUICKSHADEREFFECTMESH_P_H
#define QQUICKSHADEREFFECTMESH_P_H

QT_BEGIN_NAMESPACE

class QSGGeometry;
class QRectF;

class QQuickShaderEffectMesh : public QObject
{
    Q_OBJECT
public:
    QQuickShaderEffectMesh(QObject *parent = 0);
    // If 'geometry' != 0, 'attributes' is the same as last time the function was called.
    virtual QSGGeometry *updateGeometry(QSGGeometry *geometry, const QVector<QByteArray> &attributes, const QRectF &rect) = 0;
    // If updateGeometry() fails, the reason should appear in the log.
    virtual QString log() const { return QString(); }

Q_SIGNALS:
    // Emitted when the geometry needs to be updated.
    void geometryChanged();
};

class QQuickGridMesh : public QQuickShaderEffectMesh
{
    Q_OBJECT
    Q_PROPERTY(QSize resolution READ resolution WRITE setResolution NOTIFY resolutionChanged)
public:
    QQuickGridMesh(QObject *parent = 0);
    virtual QSGGeometry *updateGeometry(QSGGeometry *geometry, const QVector<QByteArray> &attributes, const QRectF &rect);
    virtual QString log() const { return m_log; }

    void setResolution(const QSize &res);
    QSize resolution() const;

Q_SIGNALS:
    void resolutionChanged();

private:
    QSize m_resolution;
    QString m_log;
};

inline QColor qt_premultiply_color(const QColor &c)
{
    return QColor::fromRgbF(c.redF() * c.alphaF(), c.greenF() * c.alphaF(), c.blueF() * c.alphaF(), c.alphaF());
}


QT_END_NAMESPACE

#endif // QQUICKSHADEREFFECTMESH_P_H