VkDescriptorBufferInfo

The VkDescriptorBufferInfo structure is defined as:

typedef struct VkDescriptorBufferInfo {
    VkBuffer buffer;
    VkDeviceSize offset;
    VkDeviceSize range;
} VkDescriptorBufferInfo;

• buffer is VK_NULL_HANDLE or the buffer resource.
• offset is the offset in bytes from the start of buffer. Access to buffer memory via this descriptor uses addressing that is relative to this starting offset.
• range is the size in bytes that is used for this descriptor update, or VK_WHOLE_SIZE to use the range from offset to the end of the buffer.

  When setting range to VK_WHOLE_SIZE, the effective range must not be larger than the maximum range for the descriptor type (maxUniformBufferRange or maxStorageBufferRange). This means that VK_WHOLE_SIZE is not typically useful in the common case where uniform buffer descriptors are suballocated from a buffer that is much larger than maxUniformBufferRange.

For VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER_DYNAMIC and VK_DESCRIPTOR_TYPE_STORAGE_BUFFER_DYNAMIC descriptor types, offset is the base offset from which the dynamic offset is applied and range is the static size used for all dynamic offsets.

When range is VK_WHOLE_SIZE the effective range is calculated at vkUpdateDescriptorSets is by taking the size of buffer minus the offset.