Method ImportIES

Source/Engine/ContentImporters/ImportTexture.cpp:474–518

}

CreateAssetResult ImportTexture::ImportIES(class CreateAssetContext& context)
{
    // Base
    IMPORT_SETUP(IESProfile, 4);

    // Load file
    Array<byte> fileData;
    if (File::ReadAllBytes(context.InputPath, fileData))
    {
        return CreateAssetResult::InvalidPath;
    }
    fileData.Add('\0');

    // Load IES profile data
    ::ImportIES loader;
    if (loader.Load(fileData.Get()))
    {
        return CreateAssetResult::Error;
    }

    // Extract texture data
    Array<byte> rawData;
    const float multiplier = loader.ExtractInR16(rawData);

    // Fill texture header
    TextureHeader textureHeader;
    textureHeader.Width = loader.GetWidth();
    textureHeader.Height = loader.GetHeight();
    textureHeader.MipLevels = 1;
    textureHeader.Type = TextureFormatType::Unknown;
    textureHeader.Format = PixelFormat::R16_Float;
    auto data = (IESProfile::CustomDataLayout*)textureHeader.CustomData;
    static_assert(sizeof(IESProfile::CustomDataLayout) <= sizeof(textureHeader.CustomData), "Invalid Custom Data size in Texture Header.");
    data->Brightness = loader.GetBrightness();
    data->TextureMultiplier = multiplier;
    ASSERT(textureHeader.MipLevels <= GPU_MAX_TEXTURE_MIP_LEVELS);
    context.Data.CustomData.Copy(&textureHeader);

    // Set mip
    if (context.AllocateChunk(0))
        return CreateAssetResult::CannotAllocateChunk;
    context.Data.Header.Chunks[0]->Data.Copy(rawData);

    return CreateAssetResult::Ok;
}

#endif