/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: NPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Netscape Public License
 * Version 1.1 (the "License"); you may not use this file except in
 * compliance with the License. You may obtain a copy of the License at
 * http://www.mozilla.org/NPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is mozilla.org code.
 *
 * The Initial Developer of the Original Code is 
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 1998
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the NPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the NPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#ifndef nsImageBeOS_h___
#define nsImageBeOS_h___

#include "nsIImage.h"
#include "nsPoint.h"

#include <Bitmap.h>

#undef Bool

class nsImageBeOS : public nsIImage
{
public:
  nsImageBeOS();
  virtual ~nsImageBeOS();

  NS_DECL_ISUPPORTS

  /**
  @see nsIImage.h
  */
  virtual PRInt32     GetBytesPix()       { return mNumBytesPixel; } 
  virtual PRInt32     GetHeight();
  virtual PRInt32     GetWidth();
  virtual PRUint8*    GetBits();
  virtual void*       GetBitInfo();
  virtual PRBool      GetIsRowOrderTopToBottom() { return mIsTopToBottom; }
  virtual PRInt32     GetLineStride();

  NS_IMETHOD     SetNaturalWidth(PRInt32 naturalwidth) { mNaturalWidth= naturalwidth; return NS_OK;} 
  NS_IMETHOD     SetNaturalHeight(PRInt32 naturalheight) { mNaturalHeight= naturalheight; return NS_OK;} 
  virtual PRInt32     GetNaturalWidth() {return mNaturalWidth; } 
  virtual PRInt32     GetNaturalHeight() {return mNaturalHeight; } 
 
  NS_IMETHOD          SetDecodedRect(PRInt32 x1, PRInt32 y1, PRInt32 x2, PRInt32 y2);        
  virtual PRInt32     GetDecodedX1() { return mDecodedX1;}
  virtual PRInt32     GetDecodedY1() { return mDecodedY1;}
  virtual PRInt32     GetDecodedX2() { return mDecodedX2;}
  virtual PRInt32     GetDecodedY2() { return mDecodedY2;}

  virtual nsColorMap* GetColorMap();

  NS_IMETHOD Draw(nsIRenderingContext &aContext,
                  nsDrawingSurface aSurface,
                  PRInt32 aX, PRInt32 aY,
                  PRInt32 aWidth, PRInt32 aHeight);
  NS_IMETHOD Draw(nsIRenderingContext &aContext,
                  nsDrawingSurface aSurface,
                  PRInt32 aSX, PRInt32 aSY, PRInt32 aSWidth, PRInt32 aSHeight,
                  PRInt32 aDX, PRInt32 aDY, PRInt32 aDWidth, PRInt32 aDHeight);

#ifdef USE_IMG2
  NS_IMETHOD DrawToImage(nsIImage* aDstImage, nscoord aDX, nscoord aDY,
                         nscoord aDWidth, nscoord aDHeight);
#endif
 
  NS_IMETHOD DrawTile(nsIRenderingContext &aContext, 
                      nsDrawingSurface aSurface, 
                      nsRect &aSrcRect, 
                      nsRect &aTileRect); 
 
  NS_IMETHOD DrawTile(nsIRenderingContext &aContext, 
                      nsDrawingSurface aSurface, 
                      PRInt32 aSXOffset, PRInt32 aSYOffset, 
                      const nsRect &aTileRect); 
 
  virtual void ImageUpdated(nsIDeviceContext *aContext,
                            PRUint8 aFlags, nsRect *aUpdateRect);
  virtual nsresult    Init(PRInt32 aWidth, PRInt32 aHeight,
                           PRInt32 aDepth,
                           nsMaskRequirements aMaskRequirements);
  virtual PRBool      IsOptimized();

  virtual nsresult    Optimize(nsIDeviceContext* aContext);
 
  virtual PRBool      GetHasAlphaMask()     { return mAlphaBits != nsnull; }
  virtual PRUint8*    GetAlphaBits();
  virtual PRInt32     GetAlphaWidth();
  virtual PRInt32     GetAlphaHeight();
  virtual PRInt32     GetAlphaLineStride();
  virtual nsIImage*   DuplicateImage();

  virtual void  SetAlphaLevel(PRInt32 aAlphaLevel);
  virtual PRInt32 GetAlphaLevel();
  /**
   * Get the alpha depth for the image mask
   * @update - lordpixel 2001/05/16
   * @return  the alpha mask depth for the image, ie, 0, 1 or 8
   */
  virtual PRInt8 GetAlphaDepth() {return(mAlphaDepth);}  
  virtual void  MoveAlphaMask(PRInt32 aX, PRInt32 aY);

  NS_IMETHOD   LockImagePixels(PRBool aMaskPixels);
  NS_IMETHOD   UnlockImagePixels(PRBool aMaskPixels);    

private:
  /**
   * Calculate the amount of memory needed for the initialization of the image
   */
  void ComputeMetrics() { 
    mRowBytes = (mWidth * mDepth) >> 5; 
 
    if (((PRUint32)mWidth * mDepth) & 0x1F) 
      mRowBytes++; 
    mRowBytes <<= 2; 
    
    mSizeImage = mRowBytes * mHeight; 
  }; 
  void ComputePaletteSize(PRIntn nBitCount);

protected:
	void		CreateImage(nsDrawingSurface aSurface);
	nsresult	BuildImage(nsDrawingSurface aDrawingSurface);

private:
  BBitmap   *mImage;
  PRBool     mStaticImage;
  
  PRInt32    mWidth;
  PRInt32    mHeight;
  PRInt32    mDepth;       // bits per pixel
  PRInt32    mRowBytes;
  PRUint8    *mImageBits;
  PRUint8    *mConvertedBits;
  PRInt32    mSizeImage;
  PRBool     mIsTopToBottom;

  PRInt8     mNumBytesPixel;
 
  PRInt32              mNaturalWidth; 
  PRInt32              mNaturalHeight; 

  PRInt32             mDecodedX1;       //Keeps track of what part of image
  PRInt32             mDecodedY1;       // has been decoded.
  PRInt32             mDecodedX2; 
  PRInt32             mDecodedY2;    

  // alpha layer members
  PRUint8    *mAlphaBits;
  PRInt8     mAlphaDepth;        // alpha layer depth
  PRInt16    mAlphaRowBytes;     // alpha bytes per row
  PRInt16    mAlphaWidth;        // alpha layer width
  PRInt16    mAlphaHeight;       // alpha layer height
  nsPoint    mLocation;          // alpha mask location

  PRUint8    mFlags;             // flags set by ImageUpdated 
};

#endif