MNormalMapConverter.h

#ifndef MAYA_API_MNormalMapConverter
#define MAYA_API_MNormalMapConverter


// MNormalMapConverter.h

//-
// ==========================================================================
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// The coded instructions, statements, computer programs, and/or related 
// material (collectively the "Data") in these files contain unpublished 
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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