CWE-ou-minkata/Sources/Plasma/PubUtilLib/plGImage/plCubicEnvironmap.cpp

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*==LICENSE==*/
///////////////////////////////////////////////////////////////////////////////
//                                                                           //
//  plCubicEnvironmap Class Functions                                        //
//  Derived bitmap class representing a collection of mipmaps to be used for //
//  cubic environment mapping.                                               //
//  Cyan, Inc.                                                               //
//                                                                           //
//// Version History //////////////////////////////////////////////////////////
//                                                                           //
//  6.7.2001 mcn - Created.                                                  //
//                                                                           //
///////////////////////////////////////////////////////////////////////////////

#include "hsTypes.h"
#include "plCubicEnvironmap.h"
#include "plMipmap.h"


//// Constructor & Destructor /////////////////////////////////////////////////

plCubicEnvironmap::plCubicEnvironmap()
{
    int     i;

    for( i = 0; i < 6; i++ )
        fFaces[ i ] = TRACKED_NEW plMipmap;

    fInitialized = false;
}

plCubicEnvironmap::~plCubicEnvironmap()
{
    int     i;

    for( i = 0; i < 6; i++ )
        delete fFaces[ i ];
}

//// GetTotalSize /////////////////////////////////////////////////////////////
//  Get the total size in bytes

UInt32  plCubicEnvironmap::GetTotalSize( void ) const
{
    UInt32  size, i;


    for( size = 0, i = 0; i < 6; i++ )
    {
        hsAssert( fFaces[ i ] != nil, "Nil face in GetTotalSize()" );
        size += fFaces[ i ]->GetTotalSize();
    }

    return size;
}

//// Read /////////////////////////////////////////////////////////////////////

UInt32  plCubicEnvironmap::Read( hsStream *s )
{
    UInt32  i, tr = plBitmap::Read( s );


    for( i = 0; i < 6; i++ )
        tr += fFaces[ i ]->Read( s );

    fInitialized = true;

    return tr;
}

//// Write ////////////////////////////////////////////////////////////////////

UInt32  plCubicEnvironmap::Write( hsStream *s )
{
    UInt32  i, tw = plBitmap::Write( s );


    for( i = 0; i < 6; i++ )
        tw += fFaces[ i ]->Write( s );

    return tw;
}

//// CopyToFace ///////////////////////////////////////////////////////////////
//  Export-only: Copy the mipmap given into a face

void    plCubicEnvironmap::CopyToFace( plMipmap *mip, UInt8 face )
{
    hsAssert( face < 6, "Invalid face index in CopyToFace()" );
    hsAssert( fFaces[ face ] != nil, "nil face in CopyToFace()" );
    hsAssert( mip != nil, "nil source in CopyToFace()" );


    if( !fInitialized )
    {
        // Make sure our stuff matches
        fCompressionType = mip->fCompressionType;
        if( fCompressionType != kDirectXCompression )
            fUncompressedInfo.fType = mip->fUncompressedInfo.fType;
        else
        {
            fDirectXInfo.fBlockSize = mip->fDirectXInfo.fBlockSize;
            fDirectXInfo.fCompressionType = mip->fDirectXInfo.fCompressionType;
        }

        fPixelSize = mip->GetPixelSize();
        fSpace = kDirectSpace;
        fFlags = mip->GetFlags();

        fInitialized = true;
    }
    else
    {
        // Check to make sure their stuff matches
        if( IsCompressed() != mip->IsCompressed() )
        {
            hsAssert( false, "Compression types do not match in CopyToFace()" );
            return;
        }

        if( !IsCompressed() )
        {
            if( fUncompressedInfo.fType != mip->fUncompressedInfo.fType )
            {
                hsAssert( false, "Compression formats do not match in CopyToFace()" );
                return;
            }
        }
        else
        {
            if( fDirectXInfo.fBlockSize != mip->fDirectXInfo.fBlockSize ||
                fDirectXInfo.fCompressionType != mip->fDirectXInfo.fCompressionType )
            {
                hsAssert( false, "Compression formats do not match in CopyToFace()" );
                return;
            }
        }

        if( fPixelSize != mip->GetPixelSize() )
        {
            hsAssert( false, "Bitdepths do not match in CopyToFace()" );
            return;
        }

        if( fFlags != mip->GetFlags() )
        {
            hsAssert( false, "Flags do not match in CopyToFace()" );
        }
    }

    // Copy the mipmap data
    fFaces[ face ]->CopyFrom( mip );
}