vkCmdBindIndexBuffer2KHR

To bind an index buffer, along with its size, to a command buffer, call:

void vkCmdBindIndexBuffer2KHR(
    VkCommandBuffer commandBuffer,
    VkBuffer buffer,
    VkDeviceSize offset,
    VkDeviceSize size,
    VkIndexType indexType);

• commandBuffer is the command buffer into which the command is recorded.
• buffer is the buffer being bound.
• offset is the starting offset in bytes within buffer used in index buffer address calculations.
• size is the size in bytes of index data bound from buffer.
• indexType is a VkIndexType value specifying the size of the indices.

size specifies the bound size of the index buffer starting from offset. If size is VK_WHOLE_SIZE then the bound size is from offset to the end of the buffer.

If the maintenance6 feature is enabled, buffer can be VK_NULL_HANDLE. If buffer is VK_NULL_HANDLE and the nullDescriptor feature is enabled, every index fetched results in a value of zero.