#ifndef MAYA_API_MNormalMapConverter
#define MAYA_API_MNormalMapConverter


// MNormalMapConverter.h

//-
// ==========================================================================
// Copyright (C) 1995 - 2005 Alias Systems Corp. and/or its licensors.  All 
// rights reserved. 
// 
// The coded instructions, statements, computer programs, and/or related 
// material (collectively the "Data") in these files are provided by Alias 
// Systems Corp. ("Alias") and/or its licensors for the exclusive use of the 
// Customer (as defined in the Alias Software License Agreement that 
// accompanies this Alias software). Such Customer has the right to use, 
// modify, and incorporate the Data into other products and to distribute such 
// products for use by end-users.
//  
// THE DATA IS PROVIDED "AS IS".  ALIAS HEREBY DISCLAIMS ALL WARRANTIES 
// RELATING TO THE DATA, INCLUDING, WITHOUT LIMITATION, ANY AND ALL EXPRESS OR 
// IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND/OR FITNESS FOR A 
// PARTICULAR PURPOSE. IN NO EVENT SHALL ALIAS BE LIABLE FOR ANY DAMAGES 
// WHATSOEVER, WHETHER DIRECT, INDIRECT, SPECIAL, OR PUNITIVE, WHETHER IN AN 
// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, OR IN EQUITY, 
// ARISING OUT OF ACCESS TO, USE OF, OR RELIANCE UPON THE DATA.
// ==========================================================================
//+

class MNormalMapConverter
{
public:
	enum OutFormatType
	{
		RGBA,
		HILO
	};

	MNormalMapConverter(){};
	~MNormalMapConverter(){};

	// These functions assume the that file texture is square, and
	// that its dimensions are exponents of 2.
	//

	// Convert the heightfield texture to its corresponding normal map texture
	//
	bool convertToNormalMap(
		unsigned char* inImagePtr,
		unsigned int width,
		unsigned int height,
		OutFormatType outputPixelFormat,
		float bumpScale = 1.0,
		unsigned char* outImagePtr = NULL );

	// Convert the normal map texture to its corresponding heightfield texture
	//
	bool convertToHeightMap(
		unsigned char* inImagePtr,
		unsigned int width,
		unsigned int height,
		OutFormatType outputPixelFormat,
		float heightScale = 1.0,
		unsigned char* outImagePtr = NULL );

protected:

	// Convert the heightfield to the normal map texture in place
	// (replace the input texture with the normal map version)
	//
	bool convertToNormalMap_InPlace(
		unsigned char* inImagePtr,
		unsigned int width,
		unsigned int height,
		OutFormatType outputPixelFormat,
		float bumpScale );
};

#endif // MAYA_API_MNormalMapConverter