/****************************************************************************
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** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
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** This file is part of the plugins of the Qt Toolkit.
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****************************************************************************/

#ifndef QEGLFSCURSOR_H
#define QEGLFSCURSOR_H

#include <qpa/qplatformcursor.h>
#include "qeglfsscreen.h"

QT_BEGIN_NAMESPACE

class QOpenGLShaderProgram;

class QEglFSCursor : public QPlatformCursor
{
public:
    QEglFSCursor(QEglFSScreen *screen);
    ~QEglFSCursor();

    void changeCursor(QCursor *cursor, QWindow *widget);
    void pointerEvent(const QMouseEvent &event);

    QPoint pos() const;
    void setPos(const QPoint &pos);

    QRect cursorRect() const { return QRect(m_pos, m_cursor.size); }

    void render();

private:
    void createShaderPrograms();
    static void createCursorTexture(uint *texture, const QImage &image);
    void initCursorAtlas();

    QPlatformScreen *m_screen;

    // cursor atlas information
    struct CursorAtlas {
        CursorAtlas() : texture(0), cursorWidth(0), cursorHeight(0) { }
        uint texture;
        int width, height; // width and height of the the atlas
        int cursorWidth, cursorHeight; // width and height of cursors inside the atlas
        QPoint hotSpot;
    } m_cursorAtlas;

    // current cursor information
    struct Cursor {
        Cursor() : texture(0), shape(Qt::BlankCursor) { }
        uint texture; // a texture from 'image' or the atlas
        Qt::CursorShape shape;
        QRectF textureRect; // normalized rect inside texture
        QSize size; // size of the cursor
        QPoint hotSpot;
    } m_cursor;

    QPoint m_pos;

    QOpenGLShaderProgram *m_program;
    int m_vertexCoordEntry;
    int m_textureCoordEntry;
    int m_textureEntry;
};

QT_END_NAMESPACE

#endif // QEGLFSCURSOR_H