ppsspp/VR/VRBase.cpp
2022-07-08 14:44:20 +02:00

176 lines
6.7 KiB
C++

#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_ANDROID_CREATE_INSTANCE_EXTENSION_NAME,
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);
// Create the EGL Context
ovrEgl_CreateContext(&vr_engine.appState.Egl, NULL);
XrInstanceCreateInfoAndroidKHR instanceCreateInfoAndroid = {XR_TYPE_INSTANCE_CREATE_INFO_ANDROID_KHR};
instanceCreateInfoAndroid.applicationVM = java.Vm;
instanceCreateInfoAndroid.applicationActivity = java.ActivityObject;
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, "PPSSPP");
appInfo.applicationVersion = 0;
strcpy(appInfo.engineName, "PPSSPP");
appInfo.engineVersion = 0;
appInfo.apiVersion = XR_CURRENT_API_VERSION;
XrInstanceCreateInfo instanceCreateInfo;
memset(&instanceCreateInfo, 0, sizeof(instanceCreateInfo));
instanceCreateInfo.type = XR_TYPE_INSTANCE_CREATE_INFO;
instanceCreateInfo.next = (XrBaseInStructure*)&instanceCreateInfoAndroid;
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);
ovrEgl_DestroyContext(&engine->appState.Egl);
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 = engine->appState.Egl.Display;
graphicsBindingAndroidGLES.config = engine->appState.Egl.Config;
graphicsBindingAndroidGLES.context = engine->appState.Egl.Context;
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;
}