Function FillInitData

SampleFramework11/v1.02/Graphics/DDSTextureLoader.cpp:800–894

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//--------------------------------------------------------------------------------------
static HRESULT FillInitData( _In_ size_t width,
                             _In_ size_t height,
                             _In_ size_t depth,
                             _In_ size_t mipCount,
                             _In_ size_t arraySize,
                             _In_ DXGI_FORMAT format,
                             _In_ size_t maxsize,
                             _In_ size_t bitSize,
                             _In_reads_bytes_(bitSize) const uint8_t* bitData,
                             _Out_ size_t& twidth,
                             _Out_ size_t& theight,
                             _Out_ size_t& tdepth,
                             _Out_ size_t& skipMip,
                             _Out_writes_(mipCount*arraySize) D3D11_SUBRESOURCE_DATA* initData )
{
    if ( !bitData || !initData )
    {
        return E_POINTER;
    }

    skipMip = 0;
    twidth = 0;
    theight = 0;
    tdepth = 0;

    size_t NumBytes = 0;
    size_t RowBytes = 0;
    const uint8_t* pSrcBits = bitData;
    const uint8_t* pEndBits = bitData + bitSize;

    size_t index = 0;
    for( size_t j = 0; j < arraySize; j++ )
    {
        size_t w = width;
        size_t h = height;
        size_t d = depth;
        for( size_t i = 0; i < mipCount; i++ )
        {
            GetSurfaceInfo( w,
                            h,
                            format,
                            &NumBytes,
                            &RowBytes,
                            nullptr
                          );

            if ( (mipCount <= 1) || !maxsize || (w <= maxsize && h <= maxsize && d <= maxsize) )
            {
                if ( !twidth )
                {
                    twidth = w;
                    theight = h;
                    tdepth = d;
                }

                assert(index < mipCount * arraySize);
                _Analysis_assume_(index < mipCount * arraySize);
                initData[index].pSysMem = ( const void* )pSrcBits;