Oculus Quest native support

CMakeLists.txt

@@ -116,6 +116,14 @@ include(GNUInstallDirs)
 
 add_definitions(-DASSETS_DIR="${CMAKE_INSTALL_FULL_DATADIR}/ppsspp/assets/")
 
+if(OPENXR)
+	add_definitions(-DOPENXR)
+	add_library(openxr SHARED IMPORTED)
+	include_directories(ext/openxr)
+	set_property(TARGET openxr PROPERTY IMPORTED_LOCATION "${CMAKE_SOURCE_DIR}/ext/openxr/libs/arm64-v8a/libopenxr_loader.so")
+	message("OpenXR enabled")
+endif()
+
 if(GOLD)
 	add_definitions(-DGOLD)
 	message("Gold Build")
@@ -1056,6 +1064,20 @@ if(ANDROID)
 		android/jni/OpenSLContext.cpp
 		android/jni/OpenSLContext.h
 	)
+
+	if (OPENXR)
+		set(nativeExtra ${nativeExtra}
+			Common/VR/VRBase.cpp
+			Common/VR/VRBase.h
+			Common/VR/VRFramebuffer.cpp
+			Common/VR/VRFramebuffer.h
+			Common/VR/VRInput.cpp
+			Common/VR/VRInput.h
+			Common/VR/VRRenderer.cpp
+			Common/VR/VRRenderer.h
+		)
+		set(nativeExtraLibs ${nativeExtraLibs} openxr)
+	endif()
 	# No target
 elseif(IOS)
 	set(nativeExtra ${nativeExtra}

Common/GPU/OpenGL/GLQueueRunner.cpp

@@ -30,6 +30,11 @@ static constexpr int TEXCACHE_NAME_CACHE_SIZE = 16;
 extern void bindDefaultFBO();
 #endif
 
+#ifdef OPENXR
+#include "VR/VRBase.h"
+#include "VR/VRRenderer.h"
+#endif
+
 // Workaround for Retroarch. Simply declare
 //   extern GLuint g_defaultFBO;
 // and set is as appropriate. Can adjust the variables in ext/native/base/display.h as
@@ -1653,6 +1658,10 @@ void GLQueueRunner::fbo_unbind() {
 	bindDefaultFBO();
 #endif
 
+#ifdef OPENXR
+	VR_BindFramebuffer(VR_GetEngine(), 0);
+#endif
+
 	currentDrawHandle_ = 0;
 	currentReadHandle_ = 0;
 	CHECK_GL_ERROR_IF_DEBUG();

Common/GPU/OpenGL/GLRenderManager.cpp

@@ -8,6 +8,11 @@
 #include "Common/MemoryUtil.h"
 #include "Common/Math/math_util.h"
 
+#ifdef OPENXR
+#include "VR/VRBase.h"
+#include "VR/VRRenderer.h"
+#endif
+
 #if 0 // def _DEBUG
 #define VLOG(...) INFO_LOG(G3D, __VA_ARGS__)
 #else
@@ -202,6 +207,9 @@ bool GLRenderManager::ThreadFrame() {
 	std::unique_lock<std::mutex> lock(mutex_);
 	if (!run_)
 		return false;
+#ifdef OPENXR
+	VR_BeginFrame(VR_GetEngine());
+#endif
 
 	// In case of syncs or other partial completion, we keep going until we complete a frame.
 	do {
@@ -240,6 +248,9 @@ bool GLRenderManager::ThreadFrame() {
 		Run(threadFrame_);
 		VLOG("PULL: Finished frame %d", threadFrame_);
 	} while (!nextFrame);
+#ifdef OPENXR
+	VR_EndFrame(VR_GetEngine());
+#endif
 	return true;
 }
 
@@ -300,6 +311,7 @@ void GLRenderManager::BindFramebufferAsRenderTarget(GLRFramebuffer *fb, GLRRende
 #ifdef _DEBUG
 	curProgram_ = nullptr;
 #endif
+
 	// Eliminate dupes.
 	if (steps_.size() && steps_.back()->render.framebuffer == fb && steps_.back()->stepType == GLRStepType::RENDER) {
 		if (color != GLRRenderPassAction::CLEAR && depth != GLRRenderPassAction::CLEAR && stencil != GLRRenderPassAction::CLEAR) {

Common/GPU/Vulkan/VulkanLoader.cpp

@@ -305,6 +305,12 @@ void VulkanSetAvailable(bool available) {
 }
 
 bool VulkanMayBeAvailable() {
+
+#ifdef OPENXR
+	//unsupported at the moment
+	return false;
+#endif
+
 	if (g_vulkanAvailabilityChecked) {
 		return g_vulkanMayBeAvailable;
 	}

Common/Input/InputState.cpp

@@ -23,6 +23,8 @@ const char *GetDeviceName(int deviceId) {
 	case DEVICE_ID_XINPUT_3: return "x360_4";
 	case DEVICE_ID_ACCELEROMETER: return "accelerometer";
 	case DEVICE_ID_MOUSE: return "mouse";
+	case DEVICE_ID_XR_CONTROLLER_LEFT: return "xr_l";
+	case DEVICE_ID_XR_CONTROLLER_RIGHT: return "xr_r";
 	default:
 		return "unknown";
 	}

Common/Input/InputState.h

@@ -31,6 +31,8 @@ enum {
 	DEVICE_ID_XINPUT_2 = 22,
 	DEVICE_ID_XINPUT_3 = 23,
 	DEVICE_ID_ACCELEROMETER = 30,
+	DEVICE_ID_XR_CONTROLLER_LEFT = 40,
+	DEVICE_ID_XR_CONTROLLER_RIGHT = 41,
 };
 
 //number of contiguous generic joypad IDs

Common/System/System.h

@@ -45,6 +45,7 @@ enum SystemDeviceType {
 	DEVICE_TYPE_MOBILE = 0,  // phones and pads
 	DEVICE_TYPE_TV = 1,  // Android TV and similar
 	DEVICE_TYPE_DESKTOP = 2,  // Desktop computer
+	DEVICE_TYPE_VR = 3,  // VR headset
 };
 
 enum SystemKeyboardLayout {

Common/UI/UIScreen.cpp

@@ -16,6 +16,11 @@
 #include "Common/Log.h"
 #include "Common/StringUtils.h"
 
+#ifdef OPENXR
+#include "VR/VRBase.h"
+#include "VR/VRRenderer.h"
+#endif
+
 static const bool ClickDebug = false;
 
 UIScreen::UIScreen()
@@ -88,6 +93,10 @@ void UIScreen::preRender() {
 	draw->BindFramebufferAsRenderTarget(nullptr, { RPAction::CLEAR, RPAction::CLEAR, RPAction::CLEAR, 0xFF000000 }, "UI");
 	screenManager()->getUIContext()->BeginFrame();
 
+#ifdef OPENXR
+	VR_BindFramebuffer(VR_GetEngine(), 0);
+#endif
+
 	Draw::Viewport viewport;
 	viewport.TopLeftX = 0;
 	viewport.TopLeftY = 0;

Common/VR/VRBase.cpp

@@ -0,0 +1,165 @@
+#include "VRBase.h"
+
+#include <assert.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+static engine_t vr_engine;
+int vr_initialized = 0;
+
+const char* const requiredExtensionNames[] = {
+		XR_KHR_OPENGL_ES_ENABLE_EXTENSION_NAME,
+		XR_KHR_COMPOSITION_LAYER_CYLINDER_EXTENSION_NAME};
+const uint32_t numRequiredExtensions =
+		sizeof(requiredExtensionNames) / sizeof(requiredExtensionNames[0]);
+
+void VR_Init( ovrJava java ) {
+	if (vr_initialized)
+		return;
+
+	ovrApp_Clear(&vr_engine.appState);
+
+	PFN_xrInitializeLoaderKHR xrInitializeLoaderKHR;
+	xrGetInstanceProcAddr(
+			XR_NULL_HANDLE, "xrInitializeLoaderKHR", (PFN_xrVoidFunction*)&xrInitializeLoaderKHR);
+	if (xrInitializeLoaderKHR != NULL) {
+		XrLoaderInitInfoAndroidKHR loaderInitializeInfoAndroid;
+		memset(&loaderInitializeInfoAndroid, 0, sizeof(loaderInitializeInfoAndroid));
+		loaderInitializeInfoAndroid.type = XR_TYPE_LOADER_INIT_INFO_ANDROID_KHR;
+		loaderInitializeInfoAndroid.next = NULL;
+		loaderInitializeInfoAndroid.applicationVM = java.Vm;
+		loaderInitializeInfoAndroid.applicationContext = java.ActivityObject;
+		xrInitializeLoaderKHR((XrLoaderInitInfoBaseHeaderKHR*)&loaderInitializeInfoAndroid);
+	}
+
+	// Create the OpenXR instance.
+	XrApplicationInfo appInfo;
+	memset(&appInfo, 0, sizeof(appInfo));
+	strcpy(appInfo.applicationName, java.AppName);
+	strcpy(appInfo.engineName, java.AppName);
+	appInfo.applicationVersion = java.AppVersion;
+	appInfo.engineVersion = java.AppVersion;
+	appInfo.apiVersion = XR_CURRENT_API_VERSION;
+
+	XrInstanceCreateInfo instanceCreateInfo;
+	memset(&instanceCreateInfo, 0, sizeof(instanceCreateInfo));
+	instanceCreateInfo.type = XR_TYPE_INSTANCE_CREATE_INFO;
+	instanceCreateInfo.next = NULL;
+	instanceCreateInfo.createFlags = 0;
+	instanceCreateInfo.applicationInfo = appInfo;
+	instanceCreateInfo.enabledApiLayerCount = 0;
+	instanceCreateInfo.enabledApiLayerNames = NULL;
+	instanceCreateInfo.enabledExtensionCount = numRequiredExtensions;
+	instanceCreateInfo.enabledExtensionNames = requiredExtensionNames;
+
+	XrResult initResult;
+	OXR(initResult = xrCreateInstance(&instanceCreateInfo, &vr_engine.appState.Instance));
+	if (initResult != XR_SUCCESS) {
+		ALOGE("Failed to create XR instance: %d.", initResult);
+		exit(1);
+	}
+
+	XrInstanceProperties instanceInfo;
+	instanceInfo.type = XR_TYPE_INSTANCE_PROPERTIES;
+	instanceInfo.next = NULL;
+	OXR(xrGetInstanceProperties(vr_engine.appState.Instance, &instanceInfo));
+	ALOGV(
+			"Runtime %s: Version : %u.%u.%u",
+			instanceInfo.runtimeName,
+			XR_VERSION_MAJOR(instanceInfo.runtimeVersion),
+			XR_VERSION_MINOR(instanceInfo.runtimeVersion),
+			XR_VERSION_PATCH(instanceInfo.runtimeVersion));
+
+	XrSystemGetInfo systemGetInfo;
+	memset(&systemGetInfo, 0, sizeof(systemGetInfo));
+	systemGetInfo.type = XR_TYPE_SYSTEM_GET_INFO;
+	systemGetInfo.next = NULL;
+	systemGetInfo.formFactor = XR_FORM_FACTOR_HEAD_MOUNTED_DISPLAY;
+
+	XrSystemId systemId;
+	OXR(initResult = xrGetSystem(vr_engine.appState.Instance, &systemGetInfo, &systemId));
+	if (initResult != XR_SUCCESS) {
+		ALOGE("Failed to get system.");
+		exit(1);
+	}
+
+	// Get the graphics requirements.
+	PFN_xrGetOpenGLESGraphicsRequirementsKHR pfnGetOpenGLESGraphicsRequirementsKHR = NULL;
+	OXR(xrGetInstanceProcAddr(
+			vr_engine.appState.Instance,
+			"xrGetOpenGLESGraphicsRequirementsKHR",
+			(PFN_xrVoidFunction*)(&pfnGetOpenGLESGraphicsRequirementsKHR)));
+
+	XrGraphicsRequirementsOpenGLESKHR graphicsRequirements = {};
+	graphicsRequirements.type = XR_TYPE_GRAPHICS_REQUIREMENTS_OPENGL_ES_KHR;
+	OXR(pfnGetOpenGLESGraphicsRequirementsKHR(vr_engine.appState.Instance, systemId, &graphicsRequirements));
+
+	vr_engine.appState.MainThreadTid = gettid();
+	vr_engine.appState.SystemId = systemId;
+
+	vr_engine.java = java;
+	vr_initialized = 1;
+}
+
+void VR_Destroy( engine_t* engine ) {
+	if (engine == &vr_engine) {
+		xrDestroyInstance(engine->appState.Instance);
+		ovrApp_Destroy(&engine->appState);
+	}
+}
+
+void VR_EnterVR( engine_t* engine ) {
+
+	if (engine->appState.Session) {
+		ALOGE("VR_EnterVR called with existing session");
+		return;
+	}
+
+	// Create the OpenXR Session.
+	XrGraphicsBindingOpenGLESAndroidKHR graphicsBindingAndroidGLES = {};
+	graphicsBindingAndroidGLES.type = XR_TYPE_GRAPHICS_BINDING_OPENGL_ES_ANDROID_KHR;
+	graphicsBindingAndroidGLES.next = NULL;
+	graphicsBindingAndroidGLES.display = eglGetCurrentDisplay();
+	graphicsBindingAndroidGLES.config = eglGetCurrentSurface(EGL_DRAW);
+	graphicsBindingAndroidGLES.context = eglGetCurrentContext();
+
+	XrSessionCreateInfo sessionCreateInfo = {};
+	memset(&sessionCreateInfo, 0, sizeof(sessionCreateInfo));
+	sessionCreateInfo.type = XR_TYPE_SESSION_CREATE_INFO;
+	sessionCreateInfo.next = &graphicsBindingAndroidGLES;
+	sessionCreateInfo.createFlags = 0;
+	sessionCreateInfo.systemId = engine->appState.SystemId;
+
+	XrResult initResult;
+	OXR(initResult = xrCreateSession(engine->appState.Instance, &sessionCreateInfo, &engine->appState.Session));
+	if (initResult != XR_SUCCESS) {
+		ALOGE("Failed to create XR session: %d.", initResult);
+		exit(1);
+	}
+
+	// Create a space to the first path
+	XrReferenceSpaceCreateInfo spaceCreateInfo = {};
+	spaceCreateInfo.type = XR_TYPE_REFERENCE_SPACE_CREATE_INFO;
+	spaceCreateInfo.referenceSpaceType = XR_REFERENCE_SPACE_TYPE_VIEW;
+	spaceCreateInfo.poseInReferenceSpace.orientation.w = 1.0f;
+	OXR(xrCreateReferenceSpace(engine->appState.Session, &spaceCreateInfo, &engine->appState.HeadSpace));
+}
+
+void VR_LeaveVR( engine_t* engine ) {
+	if (engine->appState.Session) {
+		OXR(xrDestroySpace(engine->appState.HeadSpace));
+		// StageSpace is optional.
+		if (engine->appState.StageSpace != XR_NULL_HANDLE) {
+			OXR(xrDestroySpace(engine->appState.StageSpace));
+		}
+		OXR(xrDestroySpace(engine->appState.FakeStageSpace));
+		engine->appState.CurrentSpace = XR_NULL_HANDLE;
+		OXR(xrDestroySession(engine->appState.Session));
+		engine->appState.Session = NULL;
+	}
+}
+
+engine_t* VR_GetEngine( void ) {
+	return &vr_engine;
+}

Common/VR/VRBase.h

@@ -0,0 +1,10 @@
+#pragma once
+
+#include "VRFramebuffer.h"
+
+void VR_Init( ovrJava java );
+void VR_Destroy( engine_t* engine );
+void VR_EnterVR( engine_t* engine );
+void VR_LeaveVR( engine_t* engine );
+
+engine_t* VR_GetEngine( void );