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/*=========================================================================
Program: Visualization Toolkit
Module: XrGraphicsExtensions.h
Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
All rights reserved.
See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
//*********************************************************
// Copyright (c) Microsoft. All rights reserved.
//
// Apache 2.0 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.
//
//*********************************************************
/**
* @file XrGraphicsExtensions.h
*
* @brief Load OpenXR extensions for the defined graphics backend.
*
* Provides the GraphicsExtensionDispatchTable struct to load platform-specific
* extensions at runtime for the current XrInstance.
* XR_USE_GRAPHICS_API_D3D11 and/or XR_USE_GRAPHICS_API_OPENGL must be defined
* prior to including this header to enable the expected graphics backend.
*
* File adapted from:
* https://github.com/microsoft/MixedReality-HolographicRemoting-Samples/blob/f6b55479646bda3bffea58bb3e9c9d9c5e0ab177/remote_openxr/desktop/XrUtility/XrExtensions.h
*
* @sa
* vtkOpenXrPlatform.h XrExtensions.h XrConnectionExtensions.h
*/
#ifndef XrGraphicsExtensions_h
#define XrGraphicsExtensions_h
#ifdef XR_USE_PLATFORM_WIN32
#define FOR_EACH_WIN32_EXTENSION_FUNCTION(_) _(xrConvertWin32PerformanceCounterToTimeKHR)
#else
#define FOR_EACH_WIN32_EXTENSION_FUNCTION(_)
#endif
#ifdef XR_USE_GRAPHICS_API_D3D11
#define FOR_EACH_D3D11_EXTENSION_FUNCTION(_) _(xrGetD3D11GraphicsRequirementsKHR)
#else
#define FOR_EACH_D3D11_EXTENSION_FUNCTION(_)
#endif
#ifdef XR_USE_GRAPHICS_API_OPENGL
#define FOR_EACH_OPENGL_EXTENSION_FUNCTION(_) _(xrGetOpenGLGraphicsRequirementsKHR)
#else
#define FOR_EACH_OPENGL_EXTENSION_FUNCTION(_)
#endif
#define FOR_EACH_EXTENSION_FUNCTION(_) \
FOR_EACH_WIN32_EXTENSION_FUNCTION(_) \
FOR_EACH_OPENGL_EXTENSION_FUNCTION(_) \
FOR_EACH_D3D11_EXTENSION_FUNCTION(_)
#define GET_INSTANCE_PROC_ADDRESS(name) \
(void)xrGetInstanceProcAddr( \
instance, #name, reinterpret_cast<PFN_xrVoidFunction*>(const_cast<PFN_##name*>(&name)));
#define DEFINE_PROC_MEMBER(name) PFN_##name name{ nullptr };
namespace xr
{
VTK_ABI_NAMESPACE_BEGIN
struct GraphicsExtensionDispatchTable
{
FOR_EACH_EXTENSION_FUNCTION(DEFINE_PROC_MEMBER);
GraphicsExtensionDispatchTable() = default;
void PopulateDispatchTable(XrInstance instance)
{
FOR_EACH_EXTENSION_FUNCTION(GET_INSTANCE_PROC_ADDRESS);
}
};
VTK_ABI_NAMESPACE_END
} // namespace xr
#undef DEFINE_PROC_MEMBER
#undef GET_INSTANCE_PROC_ADDRESS
#undef FOR_EACH_EXTENSION_FUNCTION
#endif
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