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

/*==LICENSE==*

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*==LICENSE==*/

#include "HeadSpin.h"

#include "plBumpMapGen.h"

#include "plMipmap.h"

#include "hsFastMath.h"

#include "hsCodecManager.h"

plMipmap* plBumpMapGen::MakeCompatibleBlank(const plMipmap* src)
{
    return new plMipmap(src->GetWidth(), src->GetHeight(), plMipmap::kARGB32Config, 1, plMipmap::kUncompressed, plMipmap::UncompressedInfo::kRGB8888);
}

plMipmap* plBumpMapGen::TwosCompToBias(plMipmap* dst)
{
    uint8_t* pDst = (uint8_t*)dst->GetAddr32(0, 0);

    const int width = dst->GetWidth();
    const int height = dst->GetHeight();
    int i;
    int j;
    for( j = 0; j < height; j++ )
    {
        for( i = 0; i < width; i++ )
        {
            *pDst++ += 128;
            *pDst++ += 128;
            *pDst++ += 128;
            pDst++;
        }
    }

    return dst;
}

plMipmap* plBumpMapGen::QikBumpMap(plMipmap* dst, const plMipmap* origSrc, uint32_t mask, uint32_t flags)
{
    const plMipmap* src = origSrc;
    if( !dst )
    {
        dst = MakeCompatibleBlank(src);
    }
    else if( (src->GetWidth() != dst->GetWidth()) || (src->GetHeight() != dst->GetHeight()) )
    {
        plMipmap* newSrc = src->Clone();
        // Note here that ResizeNicely currently does a point sample if scaling up (and about
        // as expensive a point sample as possible without using transcendental functions).
        // This might be correctable by calling plMipmap::Filter after the upscale. Or I 
        // could just assert that dst dimensions match src dimensions.
        newSrc->ResizeNicely((uint16_t)(dst->GetWidth()), (uint16_t)(dst->GetHeight()), plMipmap::kDefaultFilter);

        src = newSrc;
    }
    if( src->IsCompressed() )
    {
        plMipmap* newSrc = hsCodecManager::Instance().CreateUncompressedMipmap(const_cast<plMipmap*>(src), hsCodecManager::k32BitDepth);
        src = newSrc;
    }
    dst->SetCurrLevel(0);

    const int32_t divis = ((mask >> 0) & 0xff)
                    +((mask >> 8) & 0xff)
                    +((mask >> 16) & 0xff);

    const int width = src->GetWidth();
    const int height = src->GetHeight();
    const int stride = src->GetRowBytes(); // Should be width * 4;

    const uint32_t alphaOr = flags & kScaleHgtByAlpha ? 0 : 0xff;

    uint32_t* pDst = dst->GetAddr32(0, 0);
    uint32_t* pBase = src->GetAddr32(0, 0);
    uint32_t* pSrc = pBase;
    int i;
    int j;
    for( j = 0; j < height; j++ )
    {
        uint32_t* pUp = j ? pSrc - width : pBase;
        uint32_t* pDn = j < height-1 ? pSrc + width : pBase;
        for( i = 0; i < width; i++ )
        {
            uint32_t* pLf = i ? pSrc - 1 : pSrc + width-1;
            uint32_t* pRt = i < width-1 ? pSrc + 1 : pSrc - width + 1;

            uint32_t up = (((*pUp & mask) >> 0) & 0xff)
                        + (((*pUp & mask) >> 8) & 0xff)
                        + (((*pUp & mask) >> 16) & 0xff);
            uint32_t dn = (((*pDn & mask) >> 0) & 0xff)
                        + (((*pDn & mask) >> 8) & 0xff)
                        + (((*pDn & mask) >> 16) & 0xff);

            uint32_t rt = (((*pRt & mask) >> 0) & 0xff)
                        + (((*pRt & mask) >> 8) & 0xff)
                        + (((*pRt & mask) >> 16) & 0xff);
            uint32_t lf = (((*pLf & mask) >> 0) & 0xff)
                        + (((*pLf & mask) >> 8) & 0xff)
                        + (((*pLf & mask) >> 16) & 0xff);

            uint32_t hgt = (((*pSrc & mask) >> 0) & 0xff)
                        + (((*pSrc & mask) >> 8) & 0xff)
                        + (((*pSrc & mask) >> 16) & 0xff);
            
            if( hgt )
                hgt *= 1;

            // Multiply by alpha, divide by 255 (so *= float(alpha/255))
            // If we aren't scaling by alpha, we just force alpha to be 255.
            hgt *= ((*pSrc >> 24) & 0xff) | alphaOr; // scale by alpha
            hgt /= 255;

            // divis has an implicit 255. For example, all three channels
            // are on, so divis = 0xff+0xff+0xff = 3*255.
            // So we muliply by 255 and divide by divis, so in this example,
            // that means divide by 3.
            int32_t delUpDn = dn - up;
            delUpDn *= 255;
            delUpDn /= divis;

            int32_t delRtLf = lf - rt;
            delRtLf *= 255;
            delRtLf /= divis;

            hgt *= 255;
            hgt /= divis;

//          hgt = 0xff;

            *pDst = ((delRtLf & 0xff) << 16)
                    |((delUpDn & 0xff) << 8)
                    |((0xff) << 0)
                    |((hgt & 0xff) << 24);

            if( delRtLf )
                hgt *= 1;
            if( delUpDn )
                hgt *= 1;


            pUp++;
            pDn++;
            pSrc++;
            pDst++;
        }
    }

    if( flags & kBias )
        TwosCompToBias(dst);

    if( origSrc != src )
        delete src;

    return dst;
}

plMipmap* plBumpMapGen::QikNormalMap(plMipmap* dst, const plMipmap* src, uint32_t mask, uint32_t flags, float smooth)
{
    dst = QikBumpMap(dst, src, mask, flags & ~kBias);

    const int width = src->GetWidth();
    const int height = src->GetHeight();

    if( flags & kBubbleTest )
    {
        int8_t* pDst = (int8_t*)dst->GetAddr32(0, 0);

        int32_t nZ = int32_t(smooth * 255.99f);

        int i;
        int j;
        for( j = 0; j < height; j++ )
        {
            for( i = 0; i < width; i++ )
            {
                float x = float(i) / float(width-1) * 2.f - 1.f;
                float y = float(j) / float(height-1) * 2.f - 1.f;

                float z = 1.f - x*x - y*y;
                if( z > 0 )
                    z = sqrt(z);
                else
                {
                    x = 0;
                    y = 0;
                    z = 1.f;
                }
                z *= smooth;
                float invLen = hsFastMath::InvSqrt(x*x + y*y + z*z) * 127.00f;


                pDst[2] = int8_t(x * invLen);
                pDst[1] = int8_t(y * invLen);
                pDst[0] = int8_t(z * invLen);

                pDst += 4;
            }
        }
    }
    else
    if( flags & kNormalize )
    {
        int8_t* pDst = (int8_t*)dst->GetAddr32(0, 0);

        int32_t nZ = int32_t(smooth * 127.00f);

        int i;
        int j;
        for( j = 0; j < height; j++ )
        {
            for( i = 0; i < width; i++ )
            {
                int32_t x = pDst[2];
                int32_t y = pDst[1];
        
                if( x )
                    x *= 1;
                if( y )
                    y *= 1;

                float invLen = hsFastMath::InvSqrt((float)(x*x + y*y + nZ*nZ)) * 127.0f;
                pDst[2] = int8_t(x * invLen);
                pDst[1] = int8_t(y * invLen);
                pDst[0] = int8_t(nZ * invLen);

                pDst += 4;
            }
        }
    }
    else if( smooth != 1.f )
    {
        int32_t divis = 127;
        int32_t nZ = 127;
        if( (smooth > 1.f) )
        {
            divis = (int32_t)(smooth * 127);
        }
        else
        {
            nZ = uint32_t(smooth * 127.5f); 
        }
        int8_t* pDst = (int8_t*)dst->GetAddr32(0, 0);

        int i;
        int j;
        for( j = 0; j < height; j++ )
        {
            for( i = 0; i < width; i++ )
            {
                int32_t v;
                *pDst = (int8_t)nZ;
                pDst++;

                v = *pDst * 127;
                v /= divis;
                *pDst = (int8_t)(v & 0xff);
                pDst++;
                
                v = *pDst * 127;
                v /= divis;
                *pDst = (int8_t)(v & 0xff);

                pDst += 2;
            }
        }
    }

    if( flags & kBias )
        TwosCompToBias(dst);

    return dst;
}