How to render HDR with Vulkan on iPadOS

Vulkan
1

My Vulkan app, which uses MoltenVK for now, is happily rendering in HDR on macOS (Sequoia) but not on iPadOS (M4 iPadPro, iPadOS 26.5). Is there something additional that I have to set to enable HDR rendering for the iPad app?

The app sets the surface format to VK_FORMAT_R16G16B16A16_SFLOAT and enables and uses the VK_EXT_swapchain_color_space extension.

2

You may also need to set the wantsExtendedDynamicRangeContent property on your CAMetalLayer to YES/true.