updateablewindow.h

Linux下比较早的基于命令行的DVD播放器

//
// Copyright (c) 2005 by Istv醤 V醨adi
//
// This file is part of dxr3Player, a DVD player written specifically 
// for the DXR3 (aka Hollywood+) decoder card, but now handles other
// hardware as well. These files contain a (mostly) user-space driver 
// for the Unichrome board found on Via's EPIA motherboards.
//
// The information for implementing this driver has been gathered
// from the following sources:
//
// - The DirectFB Unichrome driver
//   Copyright (c) 2003 Andreas Robinson, All rights reserved.
//
// - Andreas Robinson's MPEG-2 decoder for the Unichrome board.
//   Copyright (c) 2003 Andreas Robinson, All rights reserved.
//
// - Via's Unichrome Framebuffer driver
//   Copyright 1998-2003 VIA Technologies, Inc. All Rights Reserved.
//   Copyright 2001-2003 S3 Graphics, Inc. All Rights Reserved.


// 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

#ifndef UNICHROME_UPDATEABLEWINDOW_H
#define UNICHROME_UPDATEABLEWINDOW_H
//------------------------------------------------------------------------------

#include "LogicalWindow.h"

#include "util/Area.h"

//------------------------------------------------------------------------------

namespace unichrome {

//------------------------------------------------------------------------------

/**
 * An updateable window. This window keeps track of which areas have
 * been updated and provides functions to copy only those areas into
 * another window.
 */
class UpdateableWindow : public LogicalWindow
{
private:
    /**
     * The updated area.
     */
    Area updatedArea;

public:
    /**
     * Construct the logical window with the given parent.
     */
    UpdateableWindow(Window& parent, 
                     size_t x, size_t y, size_t width, size_t height);

    /**
     * Draw a line.
     */
    virtual void drawLine(size_t x1, size_t y1, size_t x2, size_t y2);

    /**
     * Fill rectangle.
     */
    virtual void fillRectangle(size_t x, size_t y, 
                               size_t width, size_t height);

    /**
     * Blit from the given starting position and size to the given
     * destination position.
     */
    virtual void blit(size_t x, size_t y,
                      size_t width, size_t height,
                      size_t dx, size_t dy,
                      blitType_t blitType = BLIT_COPY);

    /**
     * Draw an arc into the window with the given parameters
     */
    virtual void drawArc(size_t x, size_t y, size_t width, size_t height, 
                         ssize_t x0, ssize_t y0, size_t r1, size_t r2,
                         uint32_t arcColor,
                         uint32_t innerColor = Painter::transparentColor, 
                         uint32_t outerColor = Painter::transparentColor);

    /**
     * Blit the window into the given other window at the given
     * position. The updated area will be reset.
     */
    virtual void blitInto(Window& window, size_t x, size_t y);
    

    /**
     * Mark the whole window as updated
     */
    void update();

    /**
     * Blit the updated parts of the window into the given other
     * window. The updated area will be reset.
     */
    void blitUpdatedInto(Window& window, size_t x, size_t y);

private:
    /**
     * Check if the updated area is empty.
     */
    bool isUpdatedAreaEmpty() const;

    /**
     * Update the given area.
     */
    void update(size_t x1, size_t y1, size_t x2, size_t y2);

    /**
     * Reset the updated area.
     */
    void resetUpdatedArea();
};

//------------------------------------------------------------------------------

} /* namespace unichrome */

//------------------------------------------------------------------------------
#endif // UNICHROME_UPDATEABLEWINDOW_H

// Local variables:
// mode: c++
// End: