Changes For Release 0.5

A number of changes were made to the API since the 0.4 release.

The Oculus SDK 0.5 moves from static linking to a dynamic link library (DLL) model. Using a DLL offers several advantages:

• As long as the arguments and return values are the same, experiences do not need to be recompiled to take advantage of the updated library.
• Localization into new languages is easier because the functions remain consistent across languages.
• The DLL can be updated to take advantage of new features and headsets without affecting current games and experiences.

In addition to moving to a DLL model, the following changes were made:

• SDK versions now use a product.major.minor.patch format. The product value is currently set to 0 as this is a pre-release product. For example, 0.5.0.1 means Product 0, Major 5, Minor 0, Patch 1.
• Significant improvements were made to tracking behavior and performance.
• Improvements were made to the samples.
• The SDK now provides better reporting of display driver incompatibility.
• Support for DX10 was removed.
• DX9 support is deprecated and will be removed in a future version of the SDK.
• A bug was fixed where full persistence was inadvertently enabled due to device initialization races.
• Improvements were made to headset USB sleep management.
• Uncommon deadlocks were fixed in the runtime service.
• Diagnostics and configuration capture were improved.
• Monitor rotation is now supported in the legacy Extended mode.
• Default time warp scheduling is improved, which should reduce frame drops.

The following SDK changes were made:

• Moved and renamed LibOVR/Src/OVR_CAPI.h to LibOVR/Include/OVR_CAPI_0_5_0.h. Some additional public headers such as OVR_Version.h have been moved to LibOVR/Include/. Any other previously public headers are now private to LibOVR.
• Added enum ovrHmdCaps::ovrHmdCap_DebugDevice.
• Renamed enum ovrDistortionCaps::ovrDistortionCap_ProfileNoTimewarpSpinWaits to ovrDistortionCap_ProfileNoSpinWaits.
• Removed enum ovrDistortionCaps::ovrDistortionCap_NoTimewarpJit.
• Added enum ovrDistortionCaps::ovrDistortionCap_TimewarpJitDelay.
• Removed ovrTrackingState::LastVisionProcessingTime.
• Removed ovrTrackingState::LastVisionFrameLatency.
• ovr_Initialize now takes a params argument. See the in-code documentation for details.
• ovr_Initialize now returns false for additional reasons.
• No API functions can be called after ovr_Shutdown except ovr_Initialize.
• The hmdToEyeViewOffset argument for ovr_GetEyePosess is now const.
• Added the ovrQuatf playerTorsoMotion argument to ovr_GetEyeTimewarpMatricesDebug.
• Added ovr_TraceMessage.