VK_EXT_present_mode_fifo_latest_ready

Other Extension Metadata

Last Modified Date

2024-05-28

IP Status

No known IP claims.

Contributors

• James Jones, NVIDIA
• Lionel Duc, NVIDIA

Description

This device extension adds a new present mode, VK_PRESENT_MODE_FIFO_LATEST_READY_EXT.

This tear-free present mode behaves much like VK_PRESENT_MODE_FIFO_KHR, except that each vertical blanking period dequeues consecutive present requests until the latest ready is found to update the current image.

While this seems similar in concept to VK_PRESENT_MODE_MAILBOX_KHR, the fundamental difference is that the processing of the present requests is done during vblank. From the application perspective, this means for example, that in a flip-based model, a single vblank may cause multiple swapchain images to be released at once, while VK_PRESENT_MODE_MAILBOX_KHR may continuously be releasing images as new requests become ready.

This additional present mode is useful when using a time-based present API.

New Structures

• Extending VkPhysicalDeviceFeatures2, VkDeviceCreateInfo:
  • VkPhysicalDevicePresentModeFifoLatestReadyFeaturesEXT

New Enum Constants

• VK_EXT_PRESENT_MODE_FIFO_LATEST_READY_EXTENSION_NAME
• VK_EXT_PRESENT_MODE_FIFO_LATEST_READY_SPEC_VERSION
• Extending VkPresentModeKHR:
  • VK_PRESENT_MODE_FIFO_LATEST_READY_EXT
• Extending VkStructureType:
  • VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_PRESENT_MODE_FIFO_LATEST_READY_FEATURES_EXT

Version History

• Revision 1, 2024-05-28 (Lionel Duc)
  • Internal revisions