How can I generate mip maps when creating KTX2 files using writer?

[GasimGasimzada]

I am currently, manually setting data when creating KTX files from my application:

ktxTexture2 *texture = nullptr;
auto res = ktxTexture2_Create(&createInfo, KTX_TEXTURE_CREATE_ALLOC_STORAGE, &texture);

// Need to cast it to ktxTexture to be able to use the functions below
auto *baseTexture = reinterpret_cast<ktxTexture *>(texture);

ktxTexture_SetImageFromMemory(
    baseTexture, 0, 0, 0, static_cast<const ktx_uint8_t *>(asset.data.data),
    asset.size);
ktxTexture_WriteToNamedFile(baseTexture, assetPath.string().c_str());

How am I supposed to generate the mip levels for the texture when I am setting the image memory manually? Is this value only used when loading the KTX2 file?

[MarkCallow]

libktx does not contain code for resampling images. Open issue #464 is for adding this.

Currently you have to create the mip level images yourself and then set them into the ktxTexture by calling ktxTexture_SetImageFromMemory for each one using the level parameter to tell it which level you are providing.

Closing this as a duplicate.