Method GL46TextureCubeArray

GTE/Graphics/GL46/GL46TextureCubeArray.cpp:17–88

}

GL46TextureCubeArray::GL46TextureCubeArray(TextureCubeArray const* texture)
    :
    GL46TextureArray(texture, GL_TEXTURE_CUBE_MAP_ARRAY, GL_TEXTURE_BINDING_CUBE_MAP_ARRAY)
{
    // Create a texture structure.
    glGenTextures(1, &mGLHandle);
    glBindTexture(GL_TEXTURE_CUBE_MAP_ARRAY, mGLHandle);

    // Allocate (immutable) texture storage for all levels.
    auto const width = texture->GetDimension(0);
    auto const height = texture->GetDimension(1);
    auto const numItems = texture->GetNumItems();
    auto const numCubes = texture->GetNumCubes();
    glTexStorage3D(GL_TEXTURE_CUBE_MAP_ARRAY, mNumLevels, mInternalFormat, width, height, numItems);

    // The default is 4-byte alignment.  This allows byte alignment when data
    // from user buffers into textures and vice versa.
    glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
    glPixelStorei(GL_PACK_ALIGNMENT, 1);

    // Set the range of levels.
    glTexParameteri(GL_TEXTURE_CUBE_MAP_ARRAY, GL_TEXTURE_BASE_LEVEL, 0);
    glTexParameteri(GL_TEXTURE_CUBE_MAP_ARRAY, GL_TEXTURE_MAX_LEVEL, mNumLevels-1);

    // Initialize with data?
    if (texture->GetData())
    {
        if (CanAutoGenerateMipmaps())
        {
            // Initialize with the first mipmap level and then generate
            // the remaining mipmaps.
            for (uint32_t cube = 0; cube < numCubes; ++cube)
            {
                for (uint32_t face = 0; face < texture->cubeFaceCount; ++face)
                {
                    auto data = texture->GetDataFor(cube, face, 0);
                    if (data)
                    {
                        auto item = texture->GetItemIndexFor(cube, face);
                        LoadTextureLevel(item, 0, data);
                    }
                }
            }
            GenerateMipmaps();
        }
        else
        {
            // Initialize with each mipmap level.
            for (uint32_t cube = 0; cube < numCubes; ++cube)
            {
                for (uint32_t face = 0; face < texture->cubeFaceCount; ++face)
                {
                    for (int32_t level = 0; level < mNumLevels; ++level)
                    {
                        auto data = texture->GetDataFor(cube, face, level);
                        if (data)
                        {
                            auto item = texture->GetItemIndexFor(cube, face);