render.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 TOLTECS_RENDER_H
#define TOLTECS_RENDER_H

#include "graphics/surface.h"

#include "toltecs/segmap.h"
#include "toltecs/screen.h"
#include "toltecs/microtiles.h"

namespace Toltecs {

enum RenderType {
    kSprite,
    kText,
    kMask
};

enum RenderFlags {
    kNone           = 1 << 0,
    kRefresh        = 1 << 1,
    kRemoved        = 1 << 2,
    kMoved          = 1 << 3,
    kUnchanged      = 1 << 4
};

struct RenderTextItem {
    byte color;
    uint fontResIndex;
    byte *text;
    int len;
};

struct RenderQueueItem {
    RenderType type;
    uint flags;
    Common::Rect rect;
    int16 priority;
    union {
        SpriteDrawItem sprite;
        RenderTextItem text;
        SegmapMaskRect mask;
    };
};

class RenderQueue {
public:
    RenderQueue(ToltecsEngine *vm);
    ~RenderQueue();

    void addSprite(SpriteDrawItem &sprite);
    void addText(int16 x, int16 y, byte color, uint fontResIndex, byte *text, int len);
    void addMask(SegmapMaskRect &mask);
    void update();
    void clear();

protected:
    typedef Common::List<RenderQueueItem> RenderQueueArray;

    ToltecsEngine *_vm;
    RenderQueueArray *_currQueue, *_prevQueue;
    MicroTileArray *_updateUta;

    bool rectIntersectsItem(const Common::Rect &rect);
    RenderQueueItem *findItemInQueue(RenderQueueArray *queue, const RenderQueueItem &item);
    bool hasItemChanged(const RenderQueueItem &item1, const RenderQueueItem &item2);
    void invalidateItemsByRect(const Common::Rect &rect, const RenderQueueItem *item);

    void addDirtyRect(const Common::Rect &rect);
    void restoreDirtyBackground();
    void updateDirtyRects();

};

} // End of namespace Toltecs

#endif /* TOLTECS_RENDER_H */