gamesys.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 GNAP_GAMESYS_H
#define GNAP_GAMESYS_H

#include "gnap/gnap.h"
#include "gnap/resource.h"
#include "common/array.h"
#include "common/rect.h"
#include "graphics/surface.h"

namespace Gnap {

const int kMaxSequenceItems = 40;
const int kMaxSpriteDrawItems = 30;
const int kMaxSoundIds = 50;
const int kMaxSeqItems = 50;
const int kMaxUpdRects = 20;
const int kMaxGfxItems = 50;
const int kMaxAnimations = 12;

enum {
    kSeqNone        = 0x00,
    kSeqScale       = 0x01, // Enable scaling
    kSeqLoop        = 0x02, // Loop
    kSeqUnk         = 0x04, // Unknown
    kSeqSyncWait    = 0x08, // Start if other sequence is done
    kSeqSyncExists  = 0x20  // Start if other sequence exists
};

struct Sequence {
    int32 _sequenceId;
    int32 _id;
    int32 _sequenceId2;
    int32 _id2;
    uint32 _flags;
    int32 _totalDuration;
    int16 _x, _y;
};

struct SpriteDrawItem {
    int _id;
    Common::Rect _rect;
    Graphics::Surface *_surface;
};

struct RemoveSequenceItem {
    int _sequenceId;
    int _id;
    bool _forceFrameReset;
};

struct RemoveSpriteDrawItem {
    int _id;
    Graphics::Surface *_surface;
};

struct GfxItem {
    int _sequenceId;
    int _id;
    int _flags;
    SequenceAnimation *_animation;
    int _currFrameNum;
    int _delayTicks;
    bool _updFlag;
    int _updRectsCount;
    Graphics::Surface *_surface;
    Common::Rect _updRects[kMaxUpdRects];
    SequenceFrame _prevFrame;
    SequenceFrame _currFrame;
    void testUpdRect(const Common::Rect &updRect);
};

struct Animation {
    int _sequenceId;
    int _id;
    int _status;
};

class GameSys {
public:
    GameSys(GnapEngine *vm);
    ~GameSys();
    void insertSequence(int sequenceId, int id, int sequenceId2, int id2, int flags, int totalDuration, int16 x, int16 y);
    void insertDirtyRect(const Common::Rect &rect);
    void removeSequence(int sequenceId, int id, bool resetFl);
    void invalidateGrabCursorSprite(int id, Common::Rect &rect, Graphics::Surface *surface1, Graphics::Surface *surface2);
    void requestClear2(bool resetFl);
    void requestClear1();
    void requestRemoveSequence(int sequenceId, int id);
    void waitForUpdate();
    int isSequenceActive(int sequenceId, int id);
    void setBackgroundSurface(Graphics::Surface *surface, int a4, int a5, int a6, int a7);
    void setScaleValues(int a1, int a2, int a3, int a4);
    void insertSpriteDrawItem(Graphics::Surface *surface, int x, int y, int id);
    void removeSpriteDrawItem(Graphics::Surface *surface, int id);
    void drawSpriteToBackground(int x, int y, int resourceId);
    Graphics::Surface *allocSurface(int width, int height);
    Graphics::Surface *createSurface(int resourceId);
    void drawSpriteToSurface(Graphics::Surface *surface, int x, int y, int resourceId);
    void drawTextToSurface(Graphics::Surface *surface, int x, int y, byte r, byte g, byte b, const char *text);
    int getTextHeight(const char *text);
    int getTextWidth(const char *text);
    void fillSurface(Graphics::Surface *surface, int x, int y, int width, int height, byte r, byte g, byte b);
    void setAnimation(int sequenceId, int id, int animationIndex);
    int getAnimationStatus(int animationIndex);
    int getSpriteWidthById(int resourceId);
    int getSpriteHeightById(int resourceId);
    Graphics::Surface *loadBitmap(int resourceId);
    void drawBitmap(int resourceId);
public:
    GnapEngine *_vm;

    Common::Array<Common::Rect> _dirtyRects;

    SpriteDrawItem _newSpriteDrawItems[kMaxSpriteDrawItems];
    int _newSpriteDrawItemsCount;

    RemoveSequenceItem _removeSequenceItems[kMaxSequenceItems];
    int _removeSequenceItemsCount;

    RemoveSpriteDrawItem _removeSpriteDrawItems[kMaxSpriteDrawItems];
    int _removeSpriteDrawItemsCount;

    int _grabSpriteId;
    Common::Rect _grabSpriteRect;
    bool _grabSpriteChanged;
    Graphics::Surface *_grabSpriteSurface1, *_grabSpriteSurface2;

    bool _reqRemoveSequenceItem;
    int _removeSequenceItemSequenceId, _removeSequenceItemValue;

    Common::Array<int> _soundIds;


    Common::Array<Sequence> _seqItems;
    Common::Array<Sequence> _fatSequenceItems;

    GfxItem _gfxItems[kMaxGfxItems];
    int _gfxItemsCount;

    Animation _animations[kMaxAnimations];
    int _animationsCount;

    int _backgroundImageValue3, _backgroundImageValue1;
    int _backgroundImageValue4, _backgroundImageValue2;

    int32 _gameSysClock, _lastUpdateClock;
    bool _animationsDone;


    Graphics::Surface *_backgroundSurface;
    Graphics::Surface *_frontSurface;
    Common::Rect _screenRect;

    Sequence *seqFind(int sequenceId, int id, int *outIndex);
    int seqLocateGfx(int sequenceId, int id, int *outGfxIndex);
    void seqInsertGfx(int index, int duration);
    void seqRemoveGfx(int sequenceId, int id);
    bool updateSequenceDuration(int sequenceId, int id, int *outDuration);
    void updateAnimationsStatus(int sequenceId, int id);

    void restoreBackgroundRect(const Common::Rect &rect);

    void blitSurface32(Graphics::Surface *destSurface, int x, int y, Graphics::Surface *sourceSurface,
        Common::Rect &sourceRect, bool transparent);
    void blitSprite32(Graphics::Surface *destSurface, int x, int y, byte *sourcePixels,
        int sourceWidth, Common::Rect &sourceRect, uint32 *sourcePalette, bool transparent);
    void blitSpriteScaled32(Graphics::Surface *destSurface, Common::Rect &frameRect,
        Common::Rect &destRect, byte *sourcePixels, int sourceWidth, Common::Rect &sourceRect, uint32 *sourcePalette);

    void seqDrawStaticFrame(Graphics::Surface *surface, SequenceFrame &frame, Common::Rect *subRect);
    void seqDrawSpriteFrame(SpriteResource *spriteResource, SequenceFrame &frame, Common::Rect *subRect);

    void drawSprites();
    void updateRect(const Common::Rect &r);
    void updateScreen();

    void handleReqRemoveSequenceItem();
    void handleReqRemoveSequenceItems();
    void handleReqRemoveSpriteDrawItems();
    void fatUpdateFrame();
    void fatUpdate();
    void updatePlaySounds();

};

bool intersectRect(Common::Rect &intersectingRect, const Common::Rect &r1, const Common::Rect &r2);

} // End of namespace Gnap

#endif // GNAP_GAMESYS_H