C Specification

// Flag bits for XrFrameSynthesisInfoFlagsEXT
static const XrFrameSynthesisInfoFlagsEXT XR_FRAME_SYNTHESIS_INFO_USE_2D_MOTION_VECTOR_BIT_EXT = 0x00000001;
static const XrFrameSynthesisInfoFlagsEXT XR_FRAME_SYNTHESIS_INFO_REQUEST_RELAXED_FRAME_INTERVAL_BIT_EXT = 0x00000002;

Description

Flag Descriptions

  • XR_FRAME_SYNTHESIS_INFO_USE_2D_MOTION_VECTOR_BIT_EXT indicates 2D motion vector data is used.

  • XR_FRAME_SYNTHESIS_INFO_REQUEST_RELAXED_FRAME_INTERVAL_BIT_EXT provides a hint to the runtime that the application prefers additional time to render each frame, with the trade-off that more frames would be synthesized by the runtime. This may be useful for applications that prefer to conserve CPU and GPU utilization (e.g. for increased battery life) or to increase the compute budget of each frame. The runtime may request frames at any interval, regardless of the value of this flag.

By default, 3D motion vector data is expected by the runtime, so motionVectorSubImagergb, motionVectorScalexyz and motionVectorOffsetxyz are used, as described in XrFrameSynthesisInfoEXT.

When XR_FRAME_SYNTHESIS_INFO_USE_2D_MOTION_VECTOR_BIT_EXT is enabled on XrFrameSynthesisInfoEXT layerFlags, the runtime instead interprets the submitted motion vector image as 2D motion vector data, representing 2D pixel movement from the previous frame to the current frame. Pixels values are interpreted as follows for 2D motion vector data: motionVector = motionVectorSubImagerg * motionVectorScalexy + motionVectorOffsetxy. The components motionVectorSubImageba, motionVectorScalezw and motionVectorOffsetzw are ignored. Using 2D instead of 3D motion vector data may decrease the quality of the synthesized frames.

See Also

XrFrameSynthesisInfoFlagsEXT

Document Notes

For more information, see the OpenXR Specification

This page is extracted from the OpenXR Specification. Fixes and changes should be made to the Specification, not directly.

Copyright

Copyright 2014-2025 The Khronos Group Inc.

This work is licensed under a Creative Commons Attribution 4.0 International License.