Adding upstream version 124.0.1.upstream/124.0.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

9 files changed, 1131 insertions, 0 deletions

diff --git a/gfx/vr/service/osvr/ClientKit/ClientKitC.h b/gfx/vr/service/osvr/ClientKit/ClientKitC.h
new file mode 100644
index 0000000000..8309e890d3
--- /dev/null
+++ b/gfx/vr/service/osvr/ClientKit/ClientKitC.h
@@ -0,0 +1,37 @@
+/** @file
+    @brief Header
+
+    Must be c-safe!
+
+    @date 2014
+
+    @author
+    Sensics, Inc.
+    <http://sensics.com/osvr>
+*/
+
+/*
+// Copyright 2014 Sensics, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+*/
+
+#ifndef INCLUDED_ClientKitC_h_GUID_8D7DF104_892D_4CB5_2302_7C6BB5BC985C
+#define INCLUDED_ClientKitC_h_GUID_8D7DF104_892D_4CB5_2302_7C6BB5BC985C
+
+#include <osvr/ClientKit/ContextC.h>
+#include <osvr/ClientKit/InterfaceC.h>
+#include <osvr/ClientKit/InterfaceCallbackC.h>
+#include <osvr/ClientKit/SystemCallbackC.h>
+
+#endif
diff --git a/gfx/vr/service/osvr/ClientKit/ContextC.h b/gfx/vr/service/osvr/ClientKit/ContextC.h
new file mode 100644
index 0000000000..e07e1b4a77
--- /dev/null
+++ b/gfx/vr/service/osvr/ClientKit/ContextC.h
@@ -0,0 +1,96 @@
+/** @file
+    @brief Header
+
+    Must be c-safe!
+
+    @todo Apply annotation macros
+
+    @date 2014
+
+    @author
+    Sensics, Inc.
+    <http://sensics.com/osvr>
+*/
+
+/*
+// Copyright 2014 Sensics, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+*/
+
+#ifndef INCLUDED_ContextC_h_GUID_3790F330_2425_4486_4C9F_20C300D7DED3
+#define INCLUDED_ContextC_h_GUID_3790F330_2425_4486_4C9F_20C300D7DED3
+
+/* Internal Includes */
+#include <osvr/ClientKit/Export.h>
+#include <osvr/Util/APIBaseC.h>
+#include <osvr/Util/ReturnCodesC.h>
+#include <osvr/Util/AnnotationMacrosC.h>
+#include <osvr/Util/StdInt.h>
+#include <osvr/Util/ClientOpaqueTypesC.h>
+
+/* Library/third-party includes */
+/* none */
+
+/* Standard includes */
+/* none */
+
+OSVR_EXTERN_C_BEGIN
+
+/** @addtogroup ClientKit
+    @{
+*/
+
+/** @brief Initialize the library.
+
+    @param applicationIdentifier A null terminated string identifying your
+   application. Reverse DNS format strongly suggested.
+    @param flags initialization options (reserved) - pass 0 for now.
+
+    @returns Client context - will be needed for subsequent calls
+*/
+OSVR_CLIENTKIT_EXPORT OSVR_ClientContext osvrClientInit(
+    const char applicationIdentifier[], uint32_t flags OSVR_CPP_ONLY(= 0));
+
+/** @brief Updates the state of the context - call regularly in your mainloop.
+
+    @param ctx Client context
+*/
+OSVR_CLIENTKIT_EXPORT OSVR_ReturnCode osvrClientUpdate(OSVR_ClientContext ctx);
+
+/** @brief Checks to see if the client context is fully started up and connected
+    properly to a server.
+
+    If this reports that the client context is not OK, there may not be a server
+    running, or you may just have to call osvrClientUpdate() a few times to
+    permit startup to finish. The return value of this call will not change from
+    failure to success without calling osvrClientUpdate().
+
+    @param ctx Client context
+
+    @return OSVR_RETURN_FAILURE if not yet fully connected/initialized, or if
+    some other error (null context) occurs.
+*/
+OSVR_CLIENTKIT_EXPORT OSVR_ReturnCode
+osvrClientCheckStatus(OSVR_ClientContext ctx);
+
+/** @brief Shutdown the library.
+    @param ctx Client context
+*/
+OSVR_CLIENTKIT_EXPORT OSVR_ReturnCode
+osvrClientShutdown(OSVR_ClientContext ctx);
+
+/** @} */
+OSVR_EXTERN_C_END
+
+#endif
diff --git a/gfx/vr/service/osvr/ClientKit/DisplayC.h b/gfx/vr/service/osvr/ClientKit/DisplayC.h
new file mode 100644
index 0000000000..fb11ca6b53
--- /dev/null
+++ b/gfx/vr/service/osvr/ClientKit/DisplayC.h
@@ -0,0 +1,506 @@
+/** @file
+    @brief Header
+
+    Must be c-safe!
+
+    @date 2015
+
+    @author
+    Sensics, Inc.
+    <http://sensics.com/osvr>
+*/
+
+/*
+// Copyright 2015 Sensics, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//        http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+*/
+
+#ifndef INCLUDED_DisplayC_h_GUID_8658EDC9_32A2_49A2_5F5C_10F67852AE74
+#define INCLUDED_DisplayC_h_GUID_8658EDC9_32A2_49A2_5F5C_10F67852AE74
+
+/* Internal Includes */
+#include <osvr/ClientKit/Export.h>
+#include <osvr/Util/APIBaseC.h>
+#include <osvr/Util/ReturnCodesC.h>
+#include <osvr/Util/ClientOpaqueTypesC.h>
+#include <osvr/Util/RenderingTypesC.h>
+#include <osvr/Util/MatrixConventionsC.h>
+#include <osvr/Util/Pose3C.h>
+#include <osvr/Util/BoolC.h>
+#include <osvr/Util/RadialDistortionParametersC.h>
+
+/* Library/third-party includes */
+/* none */
+
+/* Standard includes */
+/* none */
+
+OSVR_EXTERN_C_BEGIN
+/** @addtogroup ClientKit
+    @{
+    @name Display API
+    @{
+*/
+
+/** @brief Opaque type of a display configuration. */
+typedef struct OSVR_DisplayConfigObject* OSVR_DisplayConfig;
+
+/** @brief Allocates a display configuration object populated with data from the
+    OSVR system.
+
+    Before this call will succeed, your application will need to be correctly
+   and fully connected to an OSVR server. You may consider putting this call in
+   a loop alternating with osvrClientUpdate() until this call succeeds.
+
+    Data provided by a display configuration object:
+
+    - The logical display topology (number and relationship of viewers, eyes,
+        and surfaces), which remains constant throughout the life of the
+        configuration object. (A method of notification of change here is TBD).
+    - Pose data for viewers (not required for rendering) and pose/view data for
+        eyes (used for rendering) which is based on tracker data: if used, these
+        should be queried every frame.
+    - Projection matrix data for surfaces, which while in current practice may
+        be relatively unchanging, we are not guaranteeing them to be constant:
+        these should be queried every frame.
+    - Video-input-relative viewport size/location for a surface: would like this
+        to be variable, but probably not feasible. If you have input, please
+        comment on the dev mailing list.
+    - Per-surface distortion strategy priorities/availabilities: constant. Note
+        the following, though...
+    - Per-surface distortion strategy parameters: variable, request each frame.
+        (Could make constant with a notification if needed?)
+
+    Important note: While most of this data is immediately available if you are
+   successful in getting a display config object, the pose-based data (viewer
+   pose, eye pose, eye view matrix) needs tracker state, so at least one (and in
+   practice, typically more) osvrClientUpdate() must be performed before a new
+   tracker report is available to populate that state. See
+   osvrClientCheckDisplayStartup() to query if all startup data is available.
+
+    @todo Decide if relative viewport should be constant in a display config,
+   and update docs accordingly.
+
+    @todo Decide if distortion params should be constant in a display config,
+   and update docs accordingly.
+
+    @return OSVR_RETURN_FAILURE if invalid parameters were passed or some other
+    error occurred, in which case the output argument is unmodified.
+*/
+OSVR_CLIENTKIT_EXPORT OSVR_ReturnCode
+osvrClientGetDisplay(OSVR_ClientContext ctx, OSVR_DisplayConfig* disp);
+
+/** @brief Frees a display configuration object. The corresponding context must
+    still be open.
+
+    If you fail to call this, it will be automatically called as part of
+    clean-up when the corresponding context is closed.
+
+    @return OSVR_RETURN_FAILURE if a null config was passed, or if the given
+    display object was already freed.
+*/
+OSVR_CLIENTKIT_EXPORT OSVR_ReturnCode
+osvrClientFreeDisplay(OSVR_DisplayConfig disp);
+
+/** @brief Checks to see if a display is fully configured and ready, including
+    having received its first pose update.
+
+    Once this first succeeds, it will continue to succeed for the lifetime of
+    the display config object, so it is not necessary to keep calling once you
+    get a successful result.
+
+    @return OSVR_RETURN_FAILURE if a null config was passed, or if the given
+    display config object was otherwise not ready for full use.
+*/
+OSVR_CLIENTKIT_EXPORT OSVR_ReturnCode
+osvrClientCheckDisplayStartup(OSVR_DisplayConfig disp);
+
+/** @brief A display config can have one or more display inputs to pass pixels
+    over (HDMI/DVI connections, etc): retrieve the number of display inputs in
+   the current configuration.
+
+    @param disp Display config object.
+    @param[out] numDisplayInputs Number of display inputs in the logical display
+    topology, **constant** throughout the active, valid lifetime of a display
+    config object.
+
+    @sa OSVR_DisplayInputCount
+
+    @return OSVR_RETURN_FAILURE if invalid parameters were passed, in
+   which case the output argument is unmodified.
+*/
+OSVR_CLIENTKIT_EXPORT OSVR_ReturnCode osvrClientGetNumDisplayInputs(
+    OSVR_DisplayConfig disp, OSVR_DisplayInputCount* numDisplayInputs);
+
+/** @brief Retrieve the pixel dimensions of a given display input for a display
+   config
+
+    @param disp Display config object.
+    @param displayInputIndex The zero-based index of the display input.
+    @param[out] width Width (in pixels) of the display input.
+    @param[out] height Height (in pixels) of the display input.
+
+    The out parameters are **constant** throughout the active, valid lifetime of
+    a display config object.
+
+    @sa OSVR_DisplayDimension
+
+    @return OSVR_RETURN_FAILURE if invalid parameters were passed, in
+   which case the output arguments are unmodified.
+*/
+OSVR_CLIENTKIT_EXPORT OSVR_ReturnCode osvrClientGetDisplayDimensions(
+    OSVR_DisplayConfig disp, OSVR_DisplayInputCount displayInputIndex,
+    OSVR_DisplayDimension* width, OSVR_DisplayDimension* height);
+
+/** @brief A display config can have one (or theoretically more) viewers:
+    retrieve the viewer count.
+
+    @param disp Display config object.
+    @param[out] viewers Number of viewers in the logical display topology,
+    **constant** throughout the active, valid lifetime of a display config
+    object.
+
+    @sa OSVR_ViewerCount
+
+    @return OSVR_RETURN_FAILURE if invalid parameters were passed, in which case
+   the output argument is unmodified.
+*/
+OSVR_CLIENTKIT_EXPORT OSVR_ReturnCode
+osvrClientGetNumViewers(OSVR_DisplayConfig disp, OSVR_ViewerCount* viewers);
+
+/** @brief Get the pose of a viewer in a display config.
+
+    Note that there may not necessarily be any surfaces rendered from this pose
+    (it's the unused "center" eye in a stereo configuration, for instance) so
+    only use this if it makes integration into your engine or existing
+    applications (not originally designed for stereo) easier.
+
+    Will only succeed if osvrClientCheckDisplayStartup() succeeds.
+
+    @return OSVR_RETURN_FAILURE if invalid parameters were passed or no pose was
+    yet available, in which case the pose argument is unmodified.
+*/
+OSVR_CLIENTKIT_EXPORT OSVR_ReturnCode osvrClientGetViewerPose(
+    OSVR_DisplayConfig disp, OSVR_ViewerCount viewer, OSVR_Pose3* pose);
+
+/** @brief Each viewer in a display config can have one or more "eyes" which
+    have a substantially similar pose: get the count.
+
+    @param disp Display config object.
+    @param viewer Viewer ID
+    @param[out] eyes Number of eyes for this viewer in the logical display
+   topology, **constant** throughout the active, valid lifetime of a display
+   config object
+
+    @sa OSVR_EyeCount
+
+    @return OSVR_RETURN_FAILURE if invalid parameters were passed, in which case
+    the output argument is unmodified.
+*/
+OSVR_CLIENTKIT_EXPORT OSVR_ReturnCode osvrClientGetNumEyesForViewer(
+    OSVR_DisplayConfig disp, OSVR_ViewerCount viewer, OSVR_EyeCount* eyes);
+
+/** @brief Get the "viewpoint" for the given eye of a viewer in a display
+   config.
+
+    Will only succeed if osvrClientCheckDisplayStartup() succeeds.
+
+    @param disp Display config object
+    @param viewer Viewer ID
+    @param eye Eye ID
+    @param[out] pose Room-space pose (not relative to pose of the viewer)
+
+    @return OSVR_RETURN_FAILURE if invalid parameters were passed or no pose was
+    yet available, in which case the pose argument is unmodified.
+*/
+OSVR_CLIENTKIT_EXPORT OSVR_ReturnCode
+osvrClientGetViewerEyePose(OSVR_DisplayConfig disp, OSVR_ViewerCount viewer,
+                           OSVR_EyeCount eye, OSVR_Pose3* pose);
+
+/** @brief Get the view matrix (inverse of pose) for the given eye of a
+    viewer in a display config - matrix of **doubles**.
+
+    Will only succeed if osvrClientCheckDisplayStartup() succeeds.
+
+    @param disp Display config object
+    @param viewer Viewer ID
+    @param eye Eye ID
+    @param flags Bitwise OR of matrix convention flags (see @ref MatrixFlags)
+    @param[out] mat Pass a double[::OSVR_MATRIX_SIZE] to get the transformation
+    matrix from room space to eye space (not relative to pose of the viewer)
+
+    @return OSVR_RETURN_FAILURE if invalid parameters were passed or no pose was
+    yet available, in which case the output argument is unmodified.
+*/
+OSVR_CLIENTKIT_EXPORT OSVR_ReturnCode osvrClientGetViewerEyeViewMatrixd(
+    OSVR_DisplayConfig disp, OSVR_ViewerCount viewer, OSVR_EyeCount eye,
+    OSVR_MatrixConventions flags, double* mat);
+
+/** @brief Get the view matrix (inverse of pose) for the given eye of a
+    viewer in a display config - matrix of **floats**.
+
+    Will only succeed if osvrClientCheckDisplayStartup() succeeds.
+
+    @param disp Display config object
+    @param viewer Viewer ID
+    @param eye Eye ID
+    @param flags Bitwise OR of matrix convention flags (see @ref MatrixFlags)
+    @param[out] mat Pass a float[::OSVR_MATRIX_SIZE] to get the transformation
+    matrix from room space to eye space (not relative to pose of the viewer)
+
+    @return OSVR_RETURN_FAILURE if invalid parameters were passed or no pose was
+    yet available, in which case the output argument is unmodified.
+*/
+OSVR_CLIENTKIT_EXPORT OSVR_ReturnCode osvrClientGetViewerEyeViewMatrixf(
+    OSVR_DisplayConfig disp, OSVR_ViewerCount viewer, OSVR_EyeCount eye,
+    OSVR_MatrixConventions flags, float* mat);
+
+/** @brief Each eye of each viewer in a display config has one or more surfaces
+    (aka "screens") on which content should be rendered.
+
+    @param disp Display config object
+    @param viewer Viewer ID
+    @param eye Eye ID
+    @param[out] surfaces Number of surfaces (numbered [0, surfaces - 1]) for the
+    given viewer and eye. **Constant** throughout the active, valid lifetime of
+    a display config object.
+
+    @sa OSVR_SurfaceCount
+
+    @return OSVR_RETURN_FAILURE if invalid parameters were passed, in which case
+    the output argument is unmodified.
+*/
+OSVR_CLIENTKIT_EXPORT OSVR_ReturnCode osvrClientGetNumSurfacesForViewerEye(
+    OSVR_DisplayConfig disp, OSVR_ViewerCount viewer, OSVR_EyeCount eye,
+    OSVR_SurfaceCount* surfaces);
+
+/** @brief Get the dimensions/location of the viewport **within the display
+    input** for a surface seen by an eye of a viewer in a display config. (This
+    does not include other video inputs that may be on a single virtual desktop,
+    etc. or explicitly account for display configurations that use multiple
+    video inputs. It does not necessarily indicate that a viewport in the sense
+    of glViewport must be created with these parameters, though the parameter
+    order matches for convenience.)
+
+    @param disp Display config object
+    @param viewer Viewer ID
+    @param eye Eye ID
+    @param surface Surface ID
+    @param[out] left Output: Distance in pixels from the left of the video input
+    to the left of the viewport.
+    @param[out] bottom Output: Distance in pixels from the bottom of the video
+    input to the bottom of the viewport.
+    @param[out] width Output: Width of viewport in pixels.
+    @param[out] height Output: Height of viewport in pixels.
+
+
+    @return OSVR_RETURN_FAILURE if invalid parameters were passed, in which case
+    the output arguments are unmodified.
+*/
+OSVR_CLIENTKIT_EXPORT OSVR_ReturnCode
+osvrClientGetRelativeViewportForViewerEyeSurface(
+    OSVR_DisplayConfig disp, OSVR_ViewerCount viewer, OSVR_EyeCount eye,
+    OSVR_SurfaceCount surface, OSVR_ViewportDimension* left,
+    OSVR_ViewportDimension* bottom, OSVR_ViewportDimension* width,
+    OSVR_ViewportDimension* height);
+
+/** @brief Get the index of the display input for a surface seen by an eye of a
+   viewer in a display config.
+
+    This is the OSVR-assigned display input: it may not (and in practice,
+    usually will not) match any platform-specific display indices. This function
+    exists to associate surfaces with video inputs as enumerated by
+    osvrClientGetNumDisplayInputs().
+
+    @param disp Display config object
+    @param viewer Viewer ID
+    @param eye Eye ID
+    @param surface Surface ID
+    @param[out] displayInput Zero-based index of the display input pixels for
+    this surface are tranmitted over.
+
+    This association is **constant** throughout the active, valid lifetime of a
+    display config object.
+
+    @sa osvrClientGetNumDisplayInputs(),
+    osvrClientGetRelativeViewportForViewerEyeSurface()
+
+    @return OSVR_RETURN_FAILURE if invalid parameters were passed, in which
+    case the output argument is unmodified.
+ */
+OSVR_CLIENTKIT_EXPORT OSVR_ReturnCode
+osvrClientGetViewerEyeSurfaceDisplayInputIndex(
+    OSVR_DisplayConfig disp, OSVR_ViewerCount viewer, OSVR_EyeCount eye,
+    OSVR_SurfaceCount surface, OSVR_DisplayInputCount* displayInput);
+
+/** @brief Get the projection matrix for a surface seen by an eye of a viewer
+    in a display config. (double version)
+
+    @param disp Display config object
+    @param viewer Viewer ID
+    @param eye Eye ID
+    @param surface Surface ID
+    @param near Distance from viewpoint to near clipping plane - must be
+    positive.
+    @param far Distance from viewpoint to far clipping plane - must be positive
+    and not equal to near, typically greater than near.
+    @param flags Bitwise OR of matrix convention flags (see @ref MatrixFlags)
+    @param[out] matrix Output projection matrix: supply an array of 16
+    (::OSVR_MATRIX_SIZE) doubles.
+
+    @return OSVR_RETURN_FAILURE if invalid parameters were passed, in which case
+    the output argument is unmodified.
+*/
+OSVR_CLIENTKIT_EXPORT OSVR_ReturnCode
+osvrClientGetViewerEyeSurfaceProjectionMatrixd(
+    OSVR_DisplayConfig disp, OSVR_ViewerCount viewer, OSVR_EyeCount eye,
+    OSVR_SurfaceCount surface, double near, double far,
+    OSVR_MatrixConventions flags, double* matrix);
+
+/** @brief Get the projection matrix for a surface seen by an eye of a viewer
+    in a display config. (float version)
+
+    @param disp Display config object
+    @param viewer Viewer ID
+    @param eye Eye ID
+    @param surface Surface ID
+    @param near Distance to near clipping plane - must be nonzero, typically
+    positive.
+    @param far Distance to far clipping plane - must be nonzero, typically
+    positive and greater than near.
+    @param flags Bitwise OR of matrix convention flags (see @ref MatrixFlags)
+    @param[out] matrix Output projection matrix: supply an array of 16
+    (::OSVR_MATRIX_SIZE) floats.
+
+    @return OSVR_RETURN_FAILURE if invalid parameters were passed, in which case
+    the output argument is unmodified.
+*/
+OSVR_CLIENTKIT_EXPORT OSVR_ReturnCode
+osvrClientGetViewerEyeSurfaceProjectionMatrixf(
+    OSVR_DisplayConfig disp, OSVR_ViewerCount viewer, OSVR_EyeCount eye,
+    OSVR_SurfaceCount surface, float near, float far,
+    OSVR_MatrixConventions flags, float* matrix);
+
+/** @brief Get the clipping planes (positions at unit distance) for a surface
+   seen by an eye of a viewer
+    in a display config.
+
+    This is only for use in integrations that cannot accept a fully-formulated
+    projection matrix as returned by
+    osvrClientGetViewerEyeSurfaceProjectionMatrixf() or
+    osvrClientGetViewerEyeSurfaceProjectionMatrixd(), and may not necessarily
+    provide the same optimizations.
+
+    As all the planes are given at unit (1) distance, before passing these
+   planes to a consuming function in your application/engine, you will typically
+   divide them by your near clipping plane distance.
+
+    @param disp Display config object
+    @param viewer Viewer ID
+    @param eye Eye ID
+    @param surface Surface ID
+    @param[out] left Distance to left clipping plane
+    @param[out] right Distance to right clipping plane
+    @param[out] bottom Distance to bottom clipping plane
+    @param[out] top Distance to top clipping plane
+
+    @return OSVR_RETURN_FAILURE if invalid parameters were passed, in which case
+    the output arguments are unmodified.
+*/
+OSVR_CLIENTKIT_EXPORT OSVR_ReturnCode
+osvrClientGetViewerEyeSurfaceProjectionClippingPlanes(
+    OSVR_DisplayConfig disp, OSVR_ViewerCount viewer, OSVR_EyeCount eye,
+    OSVR_SurfaceCount surface, double* left, double* right, double* bottom,
+    double* top);
+
+/** @brief Determines if a surface seen by an eye of a viewer in a display
+    config requests some distortion to be performed.
+
+    This simply reports true or false, and does not specify which kind of
+    distortion implementations have been parameterized for this display. For
+    each distortion implementation your application supports, you'll want to
+    call the corresponding priority function to find out if it is available.
+
+    @param disp Display config object
+    @param viewer Viewer ID
+    @param eye Eye ID
+    @param surface Surface ID
+    @param[out] distortionRequested Output parameter: whether distortion is
+    requested. **Constant** throughout the active, valid lifetime of a display
+    config object.
+
+    @return OSVR_RETURN_FAILURE if invalid parameters were passed, in which case
+    the output argument is unmodified.
+*/
+OSVR_CLIENTKIT_EXPORT OSVR_ReturnCode
+osvrClientDoesViewerEyeSurfaceWantDistortion(OSVR_DisplayConfig disp,
+                                             OSVR_ViewerCount viewer,
+                                             OSVR_EyeCount eye,
+                                             OSVR_SurfaceCount surface,
+                                             OSVR_CBool* distortionRequested);
+
+/** @brief Returns the priority/availability of radial distortion parameters for
+    a surface seen by an eye of a viewer in a display config.
+
+    If osvrClientDoesViewerEyeSurfaceWantDistortion() reports false, then the
+    display does not request distortion of any sort, and thus neither this nor
+    any other distortion strategy priority function will report an "available"
+    priority.
+
+    @param disp Display config object
+    @param viewer Viewer ID
+    @param eye Eye ID
+    @param surface Surface ID
+    @param[out] priority Output: the priority level. Negative values
+    (canonically OSVR_DISTORTION_PRIORITY_UNAVAILABLE) indicate this technique
+    not available, higher values indicate higher preference for the given
+    technique based on the device's description. **Constant** throughout the
+    active, valid lifetime of a display config object.
+
+    @return OSVR_RETURN_FAILURE if invalid parameters were passed, in which case
+    the output argument is unmodified.
+*/
+OSVR_CLIENTKIT_EXPORT OSVR_ReturnCode
+osvrClientGetViewerEyeSurfaceRadialDistortionPriority(
+    OSVR_DisplayConfig disp, OSVR_ViewerCount viewer, OSVR_EyeCount eye,
+    OSVR_SurfaceCount surface, OSVR_DistortionPriority* priority);
+
+/** @brief Returns the radial distortion parameters, if known/requested, for a
+    surface seen by an eye of a viewer in a display config.
+
+    Will only succeed if osvrClientGetViewerEyeSurfaceRadialDistortionPriority()
+    reports a non-negative priority.
+
+    @param disp Display config object
+    @param viewer Viewer ID
+    @param eye Eye ID
+    @param surface Surface ID
+    @param[out] params Output: the parameters for radial distortion
+
+    @return OSVR_RETURN_FAILURE if this surface does not have these parameters
+    described, or if invalid parameters were passed, in which case the output
+    argument is unmodified.
+*/
+OSVR_CLIENTKIT_EXPORT OSVR_ReturnCode
+osvrClientGetViewerEyeSurfaceRadialDistortion(
+    OSVR_DisplayConfig disp, OSVR_ViewerCount viewer, OSVR_EyeCount eye,
+    OSVR_SurfaceCount surface, OSVR_RadialDistortionParameters* params);
+
+/** @}
+    @}
+*/
+
+OSVR_EXTERN_C_END
+
+#endif
diff --git a/gfx/vr/service/osvr/ClientKit/Export.h b/gfx/vr/service/osvr/ClientKit/Export.h
new file mode 100644
index 0000000000..eec95c2737
--- /dev/null
+++ b/gfx/vr/service/osvr/ClientKit/Export.h
@@ -0,0 +1,140 @@
+/** @file
+    @brief Automatically-generated export header - do not edit!
+
+    @date 2016
+
+    @author
+    Sensics, Inc.
+    <http://sensics.com/osvr>
+*/
+
+// Copyright 2016 Sensics, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef OSVR_CLIENTKIT_EXPORT_H
+#define OSVR_CLIENTKIT_EXPORT_H
+
+#ifdef OSVR_CLIENTKIT_STATIC_DEFINE
+#  define OSVR_CLIENTKIT_EXPORT
+#  define OSVR_CLIENTKIT_NO_EXPORT
+#endif
+
+/* Per-compiler advance preventative definition */
+#if defined(__BORLANDC__) || defined(__CODEGEARC__) || defined(__HP_aCC) || \
+    defined(__PGI) || defined(__WATCOMC__)
+/* Compilers that don't support deprecated, according to CMake. */
+#  ifndef OSVR_CLIENTKIT_DEPRECATED
+#    define OSVR_CLIENTKIT_DEPRECATED
+#  endif
+#endif
+
+/* Check for attribute support */
+#if defined(__INTEL_COMPILER)
+/* Checking before GNUC because Intel implements GNU extensions,
+ * so it chooses to define __GNUC__ as well. */
+#  if __INTEL_COMPILER >= 1200
+/* Intel compiler 12.0 or newer can handle these attributes per CMake */
+#    define OSVR_CLIENTKIT_EXPORT_HEADER_SUPPORTS_ATTRIBUTES
+#  endif
+
+#elif defined(__GNUC__)
+#  if (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 2))
+/* GCC 4.2+ */
+#    define OSVR_CLIENTKIT_EXPORT_HEADER_SUPPORTS_ATTRIBUTES
+#  endif
+#endif
+
+/* Per-platform defines */
+#if defined(_MSC_VER)
+/* MSVC on Windows */
+
+#  ifndef OSVR_CLIENTKIT_EXPORT
+#    ifdef osvrClientKit_EXPORTS
+/* We are building this library */
+#      define OSVR_CLIENTKIT_EXPORT __declspec(dllexport)
+#    else
+/* We are using this library */
+#      define OSVR_CLIENTKIT_EXPORT __declspec(dllimport)
+#    endif
+#  endif
+
+#  ifndef OSVR_CLIENTKIT_DEPRECATED
+#    define OSVR_CLIENTKIT_DEPRECATED __declspec(deprecated)
+#  endif
+
+#elif defined(_WIN32) && defined(__GNUC__)
+/* GCC-compatible on Windows */
+
+#  ifndef OSVR_CLIENTKIT_EXPORT
+#    ifdef osvrClientKit_EXPORTS
+/* We are building this library */
+#      define OSVR_CLIENTKIT_EXPORT __attribute__((dllexport))
+#    else
+/* We are using this library */
+#      define OSVR_CLIENTKIT_EXPORT __attribute__((dllimport))
+#    endif
+#  endif
+
+#  ifndef OSVR_CLIENTKIT_DEPRECATED
+#    define OSVR_CLIENTKIT_DEPRECATED __attribute__((__deprecated__))
+#  endif
+
+#elif defined(OSVR_CLIENTKIT_EXPORT_HEADER_SUPPORTS_ATTRIBUTES) || \
+    (defined(__APPLE__) && defined(__MACH__))
+/* GCC4.2+ compatible (assuming something *nix-like) and Mac OS X */
+/* (The first macro is defined at the top of the file, if applicable) */
+/* see https://gcc.gnu.org/wiki/Visibility */
+
+#  ifndef OSVR_CLIENTKIT_EXPORT
+/* We are building/using this library */
+#    define OSVR_CLIENTKIT_EXPORT __attribute__((visibility("default")))
+#  endif
+
+#  ifndef OSVR_CLIENTKIT_NO_EXPORT
+#    define OSVR_CLIENTKIT_NO_EXPORT __attribute__((visibility("hidden")))
+#  endif
+
+#  ifndef OSVR_CLIENTKIT_DEPRECATED
+#    define OSVR_CLIENTKIT_DEPRECATED __attribute__((__deprecated__))
+#  endif
+
+#endif
+/* End of platform ifdefs */
+
+/* fallback def */
+#ifndef OSVR_CLIENTKIT_EXPORT
+#  define OSVR_CLIENTKIT_EXPORT
+#endif
+
+/* fallback def */
+#ifndef OSVR_CLIENTKIT_NO_EXPORT
+#  define OSVR_CLIENTKIT_NO_EXPORT
+#endif
+
+/* fallback def */
+#ifndef OSVR_CLIENTKIT_DEPRECATED_EXPORT
+#  define OSVR_CLIENTKIT_DEPRECATED_EXPORT \
+    OSVR_CLIENTKIT_EXPORT OSVR_CLIENTKIT_DEPRECATED
+#endif
+
+/* fallback def */
+#ifndef OSVR_CLIENTKIT_DEPRECATED_NO_EXPORT
+#  define OSVR_CLIENTKIT_DEPRECATED_NO_EXPORT \
+    OSVR_CLIENTKIT_NO_EXPORT OSVR_CLIENTKIT_DEPRECATED
+#endif
+
+/* Clean up after ourselves */
+#undef OSVR_CLIENTKIT_EXPORT_HEADER_SUPPORTS_ATTRIBUTES
+
+#endif
diff --git a/gfx/vr/service/osvr/ClientKit/InterfaceC.h b/gfx/vr/service/osvr/ClientKit/InterfaceC.h
new file mode 100644
index 0000000000..a8523b1733
--- /dev/null
+++ b/gfx/vr/service/osvr/ClientKit/InterfaceC.h
@@ -0,0 +1,74 @@
+/** @file
+    @brief Header
+
+    Must be c-safe!
+
+    @date 2014
+
+    @author
+    Sensics, Inc.
+    <http://sensics.com/osvr>
+*/
+
+/*
+// Copyright 2014 Sensics, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+*/
+
+#ifndef INCLUDED_InterfaceC_h_GUID_D90BBAA6_AD62_499D_C023_2F6ED8987C17
+#define INCLUDED_InterfaceC_h_GUID_D90BBAA6_AD62_499D_C023_2F6ED8987C17
+
+/* Internal Includes */
+#include <osvr/ClientKit/Export.h>
+#include <osvr/Util/APIBaseC.h>
+#include <osvr/Util/ReturnCodesC.h>
+#include <osvr/Util/AnnotationMacrosC.h>
+#include <osvr/Util/ClientOpaqueTypesC.h>
+
+/* Library/third-party includes */
+/* none */
+
+/* Standard includes */
+/* none */
+
+OSVR_EXTERN_C_BEGIN
+/** @addtogroup ClientKit
+@{
+*/
+
+/** @brief Get the interface associated with the given path.
+    @param ctx Client context
+    @param path A resource path (null-terminated string)
+    @param[out] iface The interface object. May be freed when no longer needed,
+   otherwise it will be freed when the context is closed.
+*/
+OSVR_CLIENTKIT_EXPORT OSVR_ReturnCode osvrClientGetInterface(
+    OSVR_ClientContext ctx, const char path[], OSVR_ClientInterface* iface);
+
+/** @brief Free an interface object before context closure.
+
+    @param ctx Client context
+    @param iface The interface object
+
+    @returns OSVR_RETURN_SUCCESS unless a null context or interface was passed
+   or the given interface was not found in the context (i.e. had already been
+   freed)
+*/
+OSVR_CLIENTKIT_EXPORT OSVR_ReturnCode
+osvrClientFreeInterface(OSVR_ClientContext ctx, OSVR_ClientInterface iface);
+
+/** @} */
+OSVR_EXTERN_C_END
+
+#endif
diff --git a/gfx/vr/service/osvr/ClientKit/InterfaceCallbackC.h b/gfx/vr/service/osvr/ClientKit/InterfaceCallbackC.h
new file mode 100644
index 0000000000..18e2c135a7
--- /dev/null
+++ b/gfx/vr/service/osvr/ClientKit/InterfaceCallbackC.h
@@ -0,0 +1,77 @@
+/** @file
+    @brief Header
+
+    Must be c-safe!
+
+    @date 2014
+
+    @author
+    Sensics, Inc.
+    <http://sensics.com/osvr>
+*/
+
+/*
+// Copyright 2014 Sensics, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+*/
+
+#ifndef INCLUDED_InterfaceCallbacksC_h_GUID_8F16E6CB_F998_4ABC_5B6B_4FC1E4B71BC9
+#define INCLUDED_InterfaceCallbacksC_h_GUID_8F16E6CB_F998_4ABC_5B6B_4FC1E4B71BC9
+
+/* Internal Includes */
+#include <osvr/ClientKit/Export.h>
+#include <osvr/Util/APIBaseC.h>
+#include <osvr/Util/ReturnCodesC.h>
+#include <osvr/Util/AnnotationMacrosC.h>
+#include <osvr/Util/ClientOpaqueTypesC.h>
+#include <osvr/Util/ClientCallbackTypesC.h>
+
+/* Library/third-party includes */
+/* none */
+
+/* Standard includes */
+/* none */
+
+OSVR_EXTERN_C_BEGIN
+
+#define OSVR_INTERFACE_CALLBACK_METHOD(TYPE)                          \
+  /** @brief Register a callback for TYPE reports on an interface */  \
+  OSVR_CLIENTKIT_EXPORT OSVR_ReturnCode osvrRegister##TYPE##Callback( \
+      OSVR_ClientInterface iface, OSVR_##TYPE##Callback cb, void* userdata);
+
+OSVR_INTERFACE_CALLBACK_METHOD(Pose)
+OSVR_INTERFACE_CALLBACK_METHOD(Position)
+OSVR_INTERFACE_CALLBACK_METHOD(Orientation)
+OSVR_INTERFACE_CALLBACK_METHOD(Velocity)
+OSVR_INTERFACE_CALLBACK_METHOD(LinearVelocity)
+OSVR_INTERFACE_CALLBACK_METHOD(AngularVelocity)
+OSVR_INTERFACE_CALLBACK_METHOD(Acceleration)
+OSVR_INTERFACE_CALLBACK_METHOD(LinearAcceleration)
+OSVR_INTERFACE_CALLBACK_METHOD(AngularAcceleration)
+OSVR_INTERFACE_CALLBACK_METHOD(Button)
+OSVR_INTERFACE_CALLBACK_METHOD(Analog)
+OSVR_INTERFACE_CALLBACK_METHOD(Imaging)
+OSVR_INTERFACE_CALLBACK_METHOD(Location2D)
+OSVR_INTERFACE_CALLBACK_METHOD(Direction)
+OSVR_INTERFACE_CALLBACK_METHOD(EyeTracker2D)
+OSVR_INTERFACE_CALLBACK_METHOD(EyeTracker3D)
+OSVR_INTERFACE_CALLBACK_METHOD(EyeTrackerBlink)
+OSVR_INTERFACE_CALLBACK_METHOD(NaviVelocity)
+OSVR_INTERFACE_CALLBACK_METHOD(NaviPosition)
+
+#undef OSVR_INTERFACE_CALLBACK_METHOD
+
+OSVR_EXTERN_C_END
+
+#endif
diff --git a/gfx/vr/service/osvr/ClientKit/InterfaceStateC.h b/gfx/vr/service/osvr/ClientKit/InterfaceStateC.h
new file mode 100644
index 0000000000..46d0b60393
--- /dev/null
+++ b/gfx/vr/service/osvr/ClientKit/InterfaceStateC.h
@@ -0,0 +1,79 @@
+/** @file
+    @brief Header
+
+    Must be c-safe!
+
+    @date 2014
+
+    @author
+    Sensics, Inc.
+    <http://sensics.com/osvr>
+*/
+
+/*
+// Copyright 2014 Sensics, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+*/
+
+#ifndef INCLUDED_InterfaceStateC_h_GUID_8F85D178_74B9_4AA9_4E9E_243089411408
+#define INCLUDED_InterfaceStateC_h_GUID_8F85D178_74B9_4AA9_4E9E_243089411408
+
+/* Internal Includes */
+#include <osvr/ClientKit/Export.h>
+#include <osvr/Util/APIBaseC.h>
+#include <osvr/Util/ReturnCodesC.h>
+#include <osvr/Util/AnnotationMacrosC.h>
+#include <osvr/Util/ClientOpaqueTypesC.h>
+#include <osvr/Util/ClientReportTypesC.h>
+#include <osvr/Util/TimeValueC.h>
+
+/* Library/third-party includes */
+/* none */
+
+/* Standard includes */
+/* none */
+
+OSVR_EXTERN_C_BEGIN
+
+#define OSVR_CALLBACK_METHODS(TYPE)                                      \
+  /** @brief Get TYPE state from an interface, returning failure if none \
+   * exists */                                                           \
+  OSVR_CLIENTKIT_EXPORT OSVR_ReturnCode osvrGet##TYPE##State(            \
+      OSVR_ClientInterface iface, struct OSVR_TimeValue* timestamp,      \
+      OSVR_##TYPE##State* state);
+
+OSVR_CALLBACK_METHODS(Pose)
+OSVR_CALLBACK_METHODS(Position)
+OSVR_CALLBACK_METHODS(Orientation)
+OSVR_CALLBACK_METHODS(Velocity)
+OSVR_CALLBACK_METHODS(LinearVelocity)
+OSVR_CALLBACK_METHODS(AngularVelocity)
+OSVR_CALLBACK_METHODS(Acceleration)
+OSVR_CALLBACK_METHODS(LinearAcceleration)
+OSVR_CALLBACK_METHODS(AngularAcceleration)
+OSVR_CALLBACK_METHODS(Button)
+OSVR_CALLBACK_METHODS(Analog)
+OSVR_CALLBACK_METHODS(Location2D)
+OSVR_CALLBACK_METHODS(Direction)
+OSVR_CALLBACK_METHODS(EyeTracker2D)
+OSVR_CALLBACK_METHODS(EyeTracker3D)
+OSVR_CALLBACK_METHODS(EyeTrackerBlink)
+OSVR_CALLBACK_METHODS(NaviVelocity)
+OSVR_CALLBACK_METHODS(NaviPosition)
+
+#undef OSVR_CALLBACK_METHODS
+
+OSVR_EXTERN_C_END
+
+#endif
diff --git a/gfx/vr/service/osvr/ClientKit/SystemCallbackC.h b/gfx/vr/service/osvr/ClientKit/SystemCallbackC.h
new file mode 100644
index 0000000000..2476d5f21c
--- /dev/null
+++ b/gfx/vr/service/osvr/ClientKit/SystemCallbackC.h
@@ -0,0 +1,47 @@
+/** @file
+    @brief Header
+
+    Must be c-safe!
+
+    @date 2014
+
+    @author
+    Sensics, Inc.
+    <http://sensics.com/osvr>
+*/
+
+/*
+// Copyright 2014 Sensics, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+*/
+
+#ifndef INCLUDED_SystemCallbackC_h_GUID_543F3F04_343E_4389_08A0_DEA988EC23F7
+#define INCLUDED_SystemCallbackC_h_GUID_543F3F04_343E_4389_08A0_DEA988EC23F7
+
+/* Internal Includes */
+#include <osvr/ClientKit/Export.h>
+#include <osvr/Util/APIBaseC.h>
+#include <osvr/Util/ReturnCodesC.h>
+#include <osvr/Util/AnnotationMacrosC.h>
+
+/* Library/third-party includes */
+/* none */
+
+/* Standard includes */
+/* none */
+
+OSVR_EXTERN_C_BEGIN
+OSVR_EXTERN_C_END
+
+#endif
diff --git a/gfx/vr/service/osvr/ClientKit/TransformsC.h b/gfx/vr/service/osvr/ClientKit/TransformsC.h
new file mode 100644
index 0000000000..183497dfd8
--- /dev/null
+++ b/gfx/vr/service/osvr/ClientKit/TransformsC.h
@@ -0,0 +1,75 @@
+/** @file
+    @brief Header controlling the OSVR transformation hierarchy
+
+    Must be c-safe!
+
+    @date 2015
+
+    @author
+    Sensics, Inc.
+    <http://sensics.com/osvr>
+*/
+
+/*
+// Copyright 2015 Sensics, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//        http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+*/
+
+#ifndef INCLUDED_TransformsC_h_GUID_5B5B7438_42D4_4095_E48A_90E2CC13498E
+#define INCLUDED_TransformsC_h_GUID_5B5B7438_42D4_4095_E48A_90E2CC13498E
+
+/* Internal Includes */
+#include <osvr/ClientKit/Export.h>
+#include <osvr/Util/APIBaseC.h>
+#include <osvr/Util/ReturnCodesC.h>
+#include <osvr/Util/ClientOpaqueTypesC.h>
+
+/* Library/third-party includes */
+/* none */
+
+/* Standard includes */
+/* none */
+
+OSVR_EXTERN_C_BEGIN
+
+/** @addtogroup ClientKit
+    @{
+*/
+
+/** @brief Updates the internal "room to world" transformation (applied to all
+    tracker data for this client context instance) based on the user's head
+    orientation, so that the direction the user is facing becomes -Z to your
+    application. Only rotates about the Y axis (yaw).
+
+    Note that this method internally calls osvrClientUpdate() to get a head pose
+    so your callbacks may be called during its execution!
+
+    @param ctx Client context
+*/
+OSVR_CLIENTKIT_EXPORT OSVR_ReturnCode
+osvrClientSetRoomRotationUsingHead(OSVR_ClientContext ctx);
+
+/** @brief Clears/resets the internal "room to world" transformation back to an
+   identity transformation - that is, clears the effect of any other
+   manipulation of the room to world transform.
+
+    @param ctx Client context
+*/
+OSVR_CLIENTKIT_EXPORT OSVR_ReturnCode
+osvrClientClearRoomToWorldTransform(OSVR_ClientContext ctx);
+
+/** @} */
+OSVR_EXTERN_C_END
+
+#endif