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/* 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 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
 * 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.
 * $URL: https://scummvm.svn.sourceforge.net/svnroot/scummvm/scummvm/tags/release-1-2-0/engines/draci/animation.h $
 * $Id: animation.h 48936 2010-05-04 12:00:16Z fingolfin $


#include "common/array.h"
#include "common/list.h"
#include "common/rect.h"
#include "draci/sprite.h"

namespace Draci {

  * Animation IDs for those animations that don't have their IDs
  * specified in the data files.
enum {
      kOverlayImage = -1,
      kWalkingMapOverlay = -2,
      kWalkingShortestPathOverlay = -3,
      kWalkingObliquePathOverlay = -4,
      kTitleText = -5,
      kSpeechText = -6,
      kInventorySprite = -7,
      kDialogueLinesID = -8,
      kUnused = -12,
      kInventoryItemsID = -13

  * Used by overlays as a neutral index that won't get
  * released with the GPL Release command.
enum { kIgnoreIndex = -2 };

class DraciEngine;
class Surface;
struct SoundSample;

class Animation {

typedef void (Animation::* AnimationCallback)();

      Animation(DraciEngine *v, int id, uint z, bool playing);

      uint getZ() const { return _z; }
      void setZ(uint z) { _z = z; }

      void setID(int id) { _id = id; }
      int getID() const { return _id; }

      void nextFrame(bool force);
      void drawFrame(Surface *surface);

      void addFrame(Drawable *frame, const SoundSample *sample);
      void replaceFrame(int i, Drawable *frame, const SoundSample *sample);
      const Drawable *getConstCurrentFrame() const;
      Drawable *getCurrentFrame();
      Drawable *getFrame(int frameNum);
      void setCurrentFrame(uint frame);
      uint currentFrameNum() const { return _currentFrame; }
      uint getFrameCount() const { return _frames.size(); }
      void makeLastFrameRelative(int x, int y);
      void clearShift();

      bool isPlaying() const { return _playing; }
      void setPlaying(bool playing);

      bool isPaused() const { return _paused; }
      void setPaused(bool paused) { _paused = paused; }

      bool isLooping() const { return _looping; }
      void setLooping(bool looping);

      void setIsRelative(bool value) { _isRelative = value; }
      bool isRelative() const { return _isRelative; }
      void setRelative(int relx, int rely);
      int getRelativeX() const { return _displacement.relX; }
      int getRelativeY() const { return _displacement.relY; }
      const Displacement &getDisplacement() const { return _displacement; }   // displacement of the whole animation
      Displacement getCurrentFrameDisplacement() const;     // displacement of the current frame (includes _shift)
      Common::Point getCurrentFramePosition() const;  // with displacement and shift applied

      void supportsQuickAnimation(bool val) { _canBeQuick = val; }

      int getIndex() const { return _index; }
      void setIndex(int index) { _index = index; }

      void setScaleFactors(double scaleX, double scaleY);
      double getScaleX() const { return _displacement.extraScaleX; }
      double getScaleY() const { return _displacement.extraScaleY; }

      void markDirtyRect(Surface *surface) const;

      // Animation callbacks.  They can only do simple things, such as
      // setting the value of some variable or stopping an animation.  In
      // particular, they cannot run sub-loops or anything like that, because
      // the callback is called at an arbitrary time without much control
      // over what the state of the rest of the program is.
      void registerCallback(AnimationCallback callback) { _callback = callback; }

      void doNothing() {}
      void exitGameLoop();
      void tellWalkingState();

      void play();
      void stop();
      void del();

      uint nextFrameNum() const;
      void deleteFrames();

      /** Internal animation ID
        * (as specified in the data files and the bytecode)
      int _id;

      /** The recency index of an animation, i.e. the most recently added animation has
        * the highest index. Some script commands need this.
      int _index;

      uint _currentFrame;
      uint _z;
      Common::Point _shift;   // partial sum of _relativeShifts from the beginning of the animation until the current frame
      bool _hasChangedFrame;

      Displacement _displacement;
      bool _isRelative;

      uint _tick;
      bool _playing;
      bool _looping;
      bool _paused;

      bool _canBeQuick;

      /** Array of frames of the animation.  The animation object owns these pointers.
      Common::Array<Drawable *> _frames;
      Common::Array<Common::Point> _relativeShifts;
      /** Array of samples played during the animation.  The animation
       * object doesn't own these pointers, but they are stored in the
       * cache.
      Common::Array<const SoundSample *> _samples;

      AnimationCallback _callback;

      DraciEngine *_vm;

class AnimationManager {

      AnimationManager(DraciEngine *vm) : _vm(vm), _lastIndex(-1), _animationPauseCounter(0) {}
      ~AnimationManager() { deleteAll(); }

      void insert(Animation *anim, bool allocateIndex);
      Animation *load(uint animNum);

      void pauseAnimations();
      void unpauseAnimations();

      void deleteAnimation(Animation *anim);
      void deleteOverlays();
      void deleteAll();

      void drawScene(Surface *surf);

      Animation *getAnimation(int id);

      int getLastIndex() const { return _lastIndex; }
      void deleteAfterIndex(int index);

      const Animation *getTopAnimation(int x, int y) const;

      void sortAnimations();

      DraciEngine *_vm;

      /** List of animation objects, maintained sorted by decreasing Z-coordinates.
       * The animation manager owns the pointers.
      Common::List<Animation *> _animations;

      /** The index of the most recently added animation.
        * See Animation::_index for details.
      int _lastIndex;

      /** How many times the animations are paused.
       * Needed because the animations can be paused once by entering the
       * inventory and then again by entering the game menu.  When they are
       * unpaused the first time, they should be kept paused. */
      int _animationPauseCounter;

} // End of namespace Draci


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