Distorted Sokoban

package com.threedcell.sokoban;

import android.graphics.Bitmap;

import android.graphics.Canvas;

import android.util.Log;

///////////////////////////////////////////////////////////////////////////////////////////////////

public class SokobanLevelBuffer 

  {

  public static int INVALID = -1;	

  private static int numBuffers;

  private static int levelHeight;

  private static int scrHeight;

  private static int[] lD;

  private static int[] rD;

  public static Canvas[] lC;

  public static Canvas[] rC;

  public static Bitmap[] lB;

  public static Bitmap[] rB;

///////////////////////////////////////////////////////////////////////////////////////////////////

  public SokobanLevelBuffer(int lh, int sh)

    {

	int tmp1 = (sh-SokobanLevels.mGap);

	int tmp2 = tmp1/lh;

	numBuffers = (tmp2*lh == tmp1 ? tmp2+1:tmp2+2);

	lB = new Bitmap[numBuffers];

	rB = new Bitmap[numBuffers];

	lD = new int[numBuffers];

	rD = new int[numBuffers];

	lC = new Canvas[numBuffers];

	rC = new Canvas[numBuffers];

    allocate(lh,sh);	

    }

///////////////////////////////////////////////////////////////////////////////////////////////////

  public static void allocate(int lh,int sh)

    {

	levelHeight= lh;

	scrHeight  = sh;

	for(int i=0; i<numBuffers; i++)

	  {

	  lB[i] = Bitmap.createBitmap( SokobanLevels.backSmallW, SokobanLevels.backSmallH,  Bitmap.Config.ARGB_8888 );

	  rB[i] = Bitmap.createBitmap( SokobanLevels.levelBigW , SokobanLevels.backSmallH,  Bitmap.Config.ARGB_8888 );

	  }

	invalidateAllL();

	invalidateAllR();

	for(int i=0; i<numBuffers; i++)

	  {

	  lC[i] = new Canvas(lB[i]);

	  rC[i] = new Canvas(rB[i]);

	  }  

    }

///////////////////////////////////////////////////////////////////////////////////////////////////

  public static int isLBuffered(int lvl)

    {

	for(int i=0; i<numBuffers; i++) if( lD[i]==lvl ) return i;

	return INVALID;

    }

///////////////////////////////////////////////////////////////////////////////////////////////////

  public static int isRBuffered(int lvl)

    {

    for(int i=0; i<numBuffers; i++) if( rD[i]==lvl ) return i;

    return INVALID;

    }

///////////////////////////////////////////////////////////////////////////////////////////////////

  public static void setLBuffered(int num,int lvl)

    {

	lD[num]=lvl;  

    }

///////////////////////////////////////////////////////////////////////////////////////////////////

  public static void setRBuffered(int num,int lvl)

    {

    rD[num]=lvl;  

    }

///////////////////////////////////////////////////////////////////////////////////////////////////

  public static void invalidateAllL()

    {

	for(int i=0; i<numBuffers; i++)

	  {

	  lD[i]=INVALID;

	  lB[i].eraseColor(0);

	  }

    }

///////////////////////////////////////////////////////////////////////////////////////////////////

  public static void invalidateAllR()

    {

    for(int i=0; i<numBuffers; i++)

      {

      rD[i]=INVALID;

      rB[i].eraseColor(0);

      }

    }

///////////////////////////////////////////////////////////////////////////////////////////////////

  public static int whereL(int lvl)

    {

	int scrollPos = SokobanLevels.getScroll();  

	int beg = 1+Math.max( scrollPos/levelHeight, 0);

	int end = 1+(scrollPos+scrHeight-SokobanLevels.mGap)/levelHeight;

	for(int i=0; i<numBuffers; i++) 

	  if( lD[i]<beg || lD[i]>end ) return i;

	Log.e("Buffer", "whereL lvl="+lvl+" beg="+beg+" end="+end+" returning -1");

	return INVALID;

    }

///////////////////////////////////////////////////////////////////////////////////////////////////

  public static int whereR(int lvl)

    {

    int scrollPos = SokobanLevels.getScroll();  

    int beg = 1+Math.max( scrollPos/levelHeight, 0);

    int end = 1+(scrollPos+scrHeight-SokobanLevels.mGap)/levelHeight;

    for(int i=0; i<numBuffers; i++) 

      if( rD[i]<beg || rD[i]>end ) return i;

    Log.e("Buffer", "whereR lvl="+lvl+" beg="+beg+" end="+end+" returning -1");

    return INVALID;

    }

///////////////////////////////////////////////////////////////////////////////////////////////////

// end of SokobanLevelBuffer class

  }