/*
 * Qt UI
 *
 * Copyright (C) 2014 Samsung Electronics Co., Ltd. All rights reserved.
 *
 * Contact:
 * Jinhyung Jo <jinhyung.jo@samsung.com>
 * GiWoong Kim <giwoong.kim@samsung.com>
 * SeokYeon Hwang <syeon.hwang@samsung.com>
 * Stanislav Vorobiov
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 * MA 02110-1301, USA.
 *
 * Contributors:
 * - S-Core Co., Ltd
 *
 */

#ifndef DISPLAYGLWIDGET_H
#define DISPLAYGLWIDGET_H


#include "displaybase.h"
#include <QMutex>
#include <QOpenGLWidget>
#include <QMatrix4x4>

extern "C" {
#include "qemu/thread.h"

// FIXME: move it to common header
struct dpy_item {
    GLuint tex;
    uint32_t width;
    uint32_t height;

    bool available;
    QemuMutex mutex;
};
}


class QOpenGLFunctions;
class QOpenGLShaderProgram;
class QOpenGLVertexArrayObject;
class QOpenGLBuffer;

class DisplayGLWidget : public QOpenGLWidget,
                        public DisplayBase
{
    Q_OBJECT

public:
    DisplayGLWidget(QWidget *parent,
                    DisplayType *displayForm,
                    QSize resolution, qreal scaleFactor);
    ~DisplayGLWidget();

    void changedTexture(struct dpy_item *tex);

protected:
    void initializeGL();
    void paintGL();
    void resizeGL(int w, int h);

    void mousePressEvent(QMouseEvent *event);
    void mouseReleaseEvent(QMouseEvent *event);
    void mouseMoveEvent(QMouseEvent *event);

    void enterEvent(QEvent *event);
    void leaveEvent(QEvent *event);

    void dragEnterEvent(QDragEnterEvent *event);
    void dropEvent(QDropEvent *event);

private:
    float getBrightness();
    void drawQuad(GLuint texture, bool isMask);
    void drawMultiTouchPoints();

    QSize mGuestResolution;
    QOpenGLFunctions *mFuncs;

    bool needScale;
    QImage maskQImage;
    GLuint maskTexture;

    dpy_item* current;
    dpy_item* next;
    QMutex textureListMutex;

    GLuint mtTexture;
    QMatrix4x4 mOrtho;
    GLfloat mVertCoords[12];
    GLfloat mTexCoords[12];

    QOpenGLVertexArrayObject *mVAO;
    QOpenGLBuffer *mVBO;
    QOpenGLShaderProgram *texProgram;
    QOpenGLShaderProgram *scaleProgram;

};

#endif // DISPLAYGLWIDGET_H