VK_KHR_present_id2

Table of Contents

1. Problem Statement
2. Solution Space
3. Proposal

This document details the proposed design for a replacement for the VK_KHR_present_id extension providing the same functionality, but being queryable per surface instead of per device.

1. Problem Statement

Vulkan WSI needs a way to allow applications to specify identifiers for specific present operations. These identifiers can then be used by other extensions to refer to those operations.

2. Solution Space

The VK_KHR_present_id extension already exists to solve this problem, however it is exposed via device capability. This leads to problems on some platforms where feature presence is not known at the device level.

Without knowing if a device can support the extension or not, the extension must be universally disabled, limiting its usability.

This proposal aims to fix this shortcoming in VK_KHR_present_id.

3. Proposal

Deprecate the existing VK_KHR_present_id extension and replace it with an almost identical extension, except this time make it queryable per surface instead of per device.