vkFormat property
The Khronos VkFormat number the mip bytes are in — see VkFormat for
the subset this container ever carries. A Basis Universal file, ETC1S or
UASTC, comes out of here as plain RGBA8, so this is
VkFormat.r8g8b8a8UNorm for those paths too: one vocabulary for "what
format are these bytes in", whichever path produced them.
Implementation
final int vkFormat;