C Specification

Valid bits for XrCompositionLayerFlags are defined by XrCompositionLayerFlagBits, which is specified as:

// Flag bits for XrCompositionLayerFlags
// XR_COMPOSITION_LAYER_CORRECT_CHROMATIC_ABERRATION_BIT is deprecated and should not be used
static const XrCompositionLayerFlags XR_COMPOSITION_LAYER_CORRECT_CHROMATIC_ABERRATION_BIT = 0x00000001;
static const XrCompositionLayerFlags XR_COMPOSITION_LAYER_BLEND_TEXTURE_SOURCE_ALPHA_BIT = 0x00000002;
static const XrCompositionLayerFlags XR_COMPOSITION_LAYER_UNPREMULTIPLIED_ALPHA_BIT = 0x00000004;
static const XrCompositionLayerFlags XR_COMPOSITION_LAYER_INVERTED_ALPHA_BIT_EXT = 0x00000008;

Description

The flag bits have the following meanings:

Flag Descriptions

  • XR_COMPOSITION_LAYER_CORRECT_CHROMATIC_ABERRATION_BIT (deprecated — ignored)  — Enables chromatic aberration correction when not done by default. This flag has no effect on any known conformant runtime, and is officially deprecated in OpenXR 1.1.

  • XR_COMPOSITION_LAYER_BLEND_TEXTURE_SOURCE_ALPHA_BIT  — Enables the layer texture alpha channel.

  • XR_COMPOSITION_LAYER_UNPREMULTIPLIED_ALPHA_BIT  — Indicates the texture color channels have not been premultiplied by the texture alpha channel.

  • XR_COMPOSITION_LAYER_INVERTED_ALPHA_BIT_EXT  — Indicates that the texture alpha channel stores transparency instead of opacity, and is to be inverted before layer blending. (Added by the XR_EXT_composition_layer_inverted_alpha extension)

See Also

XrCompositionLayerFlags, XrCompositionLayerProjection, XrCompositionLayerQuad

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.