atari-cursor.h

/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * 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 3 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, see <http://www.gnu.org/licenses/>.
 *
 */

#ifndef BACKENDS_GRAPHICS_ATARI_CURSOR_H
#define BACKENDS_GRAPHICS_ATARI_CURSOR_H

#include "common/rect.h"
#include "common/scummsys.h"
#include "graphics/surface.h"

class AtariGraphicsManager;
struct Screen;

// Global state consists of:
//  - palette (used for the overlay only atm)
//  - shape (surface, dimensions, hotspot, keycolor)
//  - visibility
// These always get updates by ScummVM, no need to differentiate between engines and the overlay.

struct Cursor {
    Cursor(AtariGraphicsManager *manager, Screen *screen)
        : _manager(manager)
        , _parentScreen(screen) {
    }

    void reset() {
        _positionChanged = true;
        _surfaceChanged = true;
        _visibilityChanged = false;

        _savedRect = Common::Rect();
    }

    // updates outOfScreen OR srcRect/dstRect (only if visible/needed)
    void update();

    // visibility
    bool setVisible(bool visible) {
        if (_visible == visible) {
            return _visible;
        }

        bool last = _visible;

        _visible = visible;

        _visibilityChanged = true;

        return last;
    }

    // position
    Common::Point getPosition() const {
        return Common::Point(_x, _y);
    }
    void setPosition(int x, int y) {
        if (_x == x && _y == y)
            return;

        _x = x;
        _y = y;

        _positionChanged = true;
    }
    void updatePosition(int deltaX, int deltaY);

    // surface
    void setSurface(const void *buf, int w, int h, int hotspotX, int hotspotY, uint32 keycolor);
    void setPalette(const byte *colors, uint start, uint num);
    void convertTo(const Graphics::PixelFormat &format);

    bool isVisible() const {
        return !_outOfScreen && _visible;
    }
    bool isChanged() const {
        return _positionChanged || _surfaceChanged || _visibilityChanged;
    }

    bool intersects(const Common::Rect &rect) const {
        return rect.intersects(_dstRect);
    }

    void flushBackground(const Graphics::Surface &srcSurface, const Common::Rect &rect);
    bool restoreBackground(const Graphics::Surface &srcSurface, bool force);
    bool draw(bool directRendering, bool force);

private:
    static byte _palette[256*3];

    AtariGraphicsManager *_manager;
    Screen *_parentScreen;

    bool _positionChanged = true;
    bool _surfaceChanged = true;
    bool _visibilityChanged = false;

    bool _visible = false;
    int _x = -1, _y = -1;
    bool _outOfScreen = true;
    Common::Rect _srcRect;
    Common::Rect _dstRect;

    Graphics::Surface _savedBackground; // used by direct rendering
    Common::Rect _savedRect;

    // related to 'surface'
    const byte *_buf = nullptr;
    int _width;
    int _height;
    int _hotspotX;
    int _hotspotY;
    uint32 _keycolor;

    Graphics::Surface _surface;
    Graphics::Surface _surfaceMask;
    int _rShift, _gShift, _bShift;
    int _rMask, _gMask, _bMask;
};

#endif // BACKENDS_GRAPHICS_ATARI_CURSOR_H