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Add minimal support to OpenXR in Android #1766

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Add minimal support to OpenXR in Android #1766

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3f19441
Add Android OpenXR backend and fix NativeXr frame-completion race
yuripourre Jul 3, 2026
c223d27
Fix NativeXr framebuffer-creation deadlock from eager scope capture
yuripourre Jul 3, 2026
b2bdd50
Add OpenXR action-based input for Meta Quest Touch controllers
yuripourre Jul 4, 2026
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58 changes: 45 additions & 13 deletions Dependencies/xr/CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -24,15 +24,27 @@ endif()

project(xr)

# Android Quest builds select OpenXR instead of ARCore via -DXR_ANDROID_BACKEND=OpenXR.
if(ANDROID)
set(XR_ANDROID_BACKEND "ARCore" CACHE STRING "Android XR backend: ARCore or OpenXR")
set_property(CACHE XR_ANDROID_BACKEND PROPERTY STRINGS ARCore OpenXR)
endif()

set(DYNAMIC_LOADER OFF CACHE BOOL "Build the loader as a .dll library")

set(SOURCES "Include/XR.h"
"Source/Shared/XRHelpers.h")

if (ANDROID)
set(SOURCES ${SOURCES}
"Source/ARCore/Include/IXrContextARCore.h"
"Source/ARCore/XR.cpp")
if(XR_ANDROID_BACKEND STREQUAL "OpenXR")
set(SOURCES ${SOURCES}
"Source/OpenXR/Android/Include/IXrContextOpenXR.h"
"Source/OpenXR/Android/XR.cpp")
else()
set(SOURCES ${SOURCES}
"Source/ARCore/Include/IXrContextARCore.h"
"Source/ARCore/XR.cpp")
endif()
elseif(IOS OR BABYLON_NATIVE_BUILD_SOURCETREE)
set(SOURCES ${SOURCES}
"Source/ARKit/Include/IXrContextARKit.h"
Expand All @@ -49,16 +61,36 @@ if (APPLE)
endif()

if (ANDROID)
add_library(arcore SHARED IMPORTED)
set_target_properties(arcore PROPERTIES IMPORTED_LOCATION
${ARCORE_LIBPATH}/${ANDROID_ABI}/libarcore_sdk_c.so
INTERFACE_INCLUDE_DIRECTORIES ${arcore-android-sdk_SOURCE_DIR}/libraries/include)

add_library(glm INTERFACE)
set_target_properties(glm PROPERTIES INTERFACE_INCLUDE_DIRECTORIES ${arcore-android-sdk_SOURCE_DIR}/libraries/glm)

target_link_libraries(xr PRIVATE glm arcore AndroidExtensions)
elseif (IOS)
if(XR_ANDROID_BACKEND STREQUAL "OpenXR")
set(BUILD_TESTS OFF CACHE BOOL "" FORCE)
set(BUILD_CONFORMANCE_TESTS OFF CACHE BOOL "" FORCE)
set(BUILD_API_LAYERS OFF CACHE BOOL "" FORCE)
set(BUILD_EXAMPLES OFF CACHE BOOL "" FORCE)
set(BUILD_LOADER ON CACHE BOOL "" FORCE)

FetchContent_Declare(OpenXR-SDK
GIT_REPOSITORY https://github.com/KhronosGroup/OpenXR-SDK.git
GIT_TAG release-1.1.47)
FetchContent_MakeAvailable(OpenXR-SDK)

target_compile_definitions(xr PRIVATE
XR_USE_PLATFORM_ANDROID
XR_USE_GRAPHICS_API_OPENGL_ES)

target_include_directories(xr PRIVATE "Source/OpenXR/Android")
target_link_libraries(xr PRIVATE openxr_loader AndroidExtensions EGL GLESv3)
else()
add_library(arcore SHARED IMPORTED)
set_target_properties(arcore PROPERTIES IMPORTED_LOCATION
${ARCORE_LIBPATH}/${ANDROID_ABI}/libarcore_sdk_c.so
INTERFACE_INCLUDE_DIRECTORIES ${arcore-android-sdk_SOURCE_DIR}/libraries/include)

add_library(glm INTERFACE)
set_target_properties(glm PROPERTIES INTERFACE_INCLUDE_DIRECTORIES ${arcore-android-sdk_SOURCE_DIR}/libraries/glm)

target_link_libraries(xr PRIVATE glm arcore AndroidExtensions)
endif()
elseif (IOS)
target_link_libraries(xr PRIVATE "-framework ARKit")
endif()

Expand Down
11 changes: 11 additions & 0 deletions Dependencies/xr/Source/OpenXR/Android/Include/IXrContextOpenXR.h
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Original file line number Diff line number Diff line change
@@ -0,0 +1,11 @@
#pragma once

#include <openxr/openxr.h>

typedef struct IXrContextOpenXR
{
virtual bool IsInitialized() const = 0;
virtual XrInstance Instance() const = 0;
virtual XrSession Session() const = 0;
virtual ~IXrContextOpenXR() = default;
} IXrContextOpenXR;
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