doom3quest/Projects/Android/jni/Doom3Quest/Doom3Quest_SurfaceView.c

/************************************************************************************

Filename	:	Q2VR_SurfaceView.c based on VrCubeWorld_SurfaceView.c
Content		:	This sample uses a plain Android SurfaceView and handles all
				Activity and Surface life cycle events in native code. This sample
				does not use the application framework and also does not use LibOVR.
				This sample only uses the VrApi.
Created		:	March, 2015
Authors		:	J.M.P. van Waveren / Simon Brown

Copyright	:	Copyright 2015 Oculus VR, LLC. All Rights reserved.

*************************************************************************************/

#include <stdio.h>
#include <ctype.h>
#include <stdlib.h>
#include <time.h>
#include <unistd.h>
#include <pthread.h>
#include <sys/prctl.h>					// for prctl( PR_SET_NAME )
#include <android/log.h>
#include <android/native_window_jni.h>	// for native window JNI
#include <android/input.h>

#include "VrInput.h"

#include <EGL/egl.h>
#include <EGL/eglext.h>
#include <GLES3/gl3.h>
#include <GLES3/gl3ext.h>

#include <SDL2/SDL.h>
#include <SDL2/SDL_main.h>
#include <SDL2/SDL_mutex.h>

#include "VrApi_Helpers.h"
#include "VrApi_SystemUtils.h"
#include "VrApi_Input.h"
#include "VrCompositor.h"
#include "VrInput.h"

#include "../../../../../../VrApi/Include/VrApi_Types.h"
#include "../../../../../../VrApi/Include/VrApi.h"


//Define all variables here that were externs in the VrCommon.h
bool Doom3Quest_initialised;
float playerYaw;
float vrFOV = 0.0f;
bool vr_moveuseoffhand;
float vr_snapturn_angle;
bool vr_switchsticks;
bool vr_secondarybuttonmappings;
bool vr_twohandedweapons;
bool shutdown;

#if !defined( EGL_OPENGL_ES3_BIT_KHR )
#define EGL_OPENGL_ES3_BIT_KHR		0x0040
#endif

// EXT_texture_border_clamp
#ifndef GL_CLAMP_TO_BORDER
#define GL_CLAMP_TO_BORDER			0x812D
#endif

#ifndef GL_TEXTURE_BORDER_COLOR
#define GL_TEXTURE_BORDER_COLOR		0x1004
#endif


// Must use EGLSyncKHR because the VrApi still supports OpenGL ES 2.0
#define EGL_SYNC

#if defined EGL_SYNC
// EGL_KHR_reusable_sync
PFNEGLCREATESYNCKHRPROC			eglCreateSyncKHR;
PFNEGLDESTROYSYNCKHRPROC		eglDestroySyncKHR;
PFNEGLCLIENTWAITSYNCKHRPROC		eglClientWaitSyncKHR;
PFNEGLSIGNALSYNCKHRPROC			eglSignalSyncKHR;
PFNEGLGETSYNCATTRIBKHRPROC		eglGetSyncAttribKHR;
#endif

//Let's go to the maximum!
const int CPU_LEVEL			= 4;
const int GPU_LEVEL			= 4;

//Passed in from the Java code
int NUM_MULTI_SAMPLES	= -1;
float SS_MULTIPLIER    = -1.0f;
int DISPLAY_REFRESH		= -1;

vrClientInfo vr;
vrClientInfo *pVRClientInfo;

jclass clazz;

float radians(float deg) {
	return (deg * M_PI) / 180.0;
}

float degrees(float rad) {
	return (rad * 180.0) / M_PI;
}

char **argv;
int argc=0;

enum control_scheme {
	RIGHT_HANDED_DEFAULT = 0,
	LEFT_HANDED_DEFAULT = 10
};

/*
================================================================================

System Clock Time in millis

================================================================================
*/

double GetTimeInMilliSeconds()
{
	struct timespec now;
	clock_gettime( CLOCK_MONOTONIC, &now );
	return ( now.tv_sec * 1e9 + now.tv_nsec ) * (double)(1e-6);
}


bool forceVirtualScreen = false;
bool inMenu = false;
bool inGameGuiActive = false;
bool objectiveSystemActive = false;
bool inCinematic = false;

void Doom3Quest_setUseScreenLayer(int screen)
{
	inMenu = screen & 0x1;
	inGameGuiActive = !!(screen & 0x2);
	objectiveSystemActive = !!(screen & 0x4);
	inCinematic = !!(screen & 0x8);
}

bool Doom3Quest_useScreenLayer()
{
    //Cinematics are now first person
	return inMenu || forceVirtualScreen || inCinematic;
}

static void UnEscapeQuotes( char *arg )
{
	char *last = NULL;
	while( *arg ) {
		if( *arg == '"' && *last == '\\' ) {
			char *c_curr = arg;
			char *c_last = last;
			while( *c_curr ) {
				*c_last = *c_curr;
				c_last = c_curr;
				c_curr++;
			}
			*c_last = '\0';
		}
		last = arg;
		arg++;
	}
}

static int ParseCommandLine(char *cmdline, char **argv)
{
	char *bufp;
	char *lastp = NULL;
	int argc, last_argc;
	argc = last_argc = 0;
	for ( bufp = cmdline; *bufp; ) {
		while ( isspace(*bufp) ) {
			++bufp;
		}
		if ( *bufp == '"' ) {
			++bufp;
			if ( *bufp ) {
				if ( argv ) {
					argv[argc] = bufp;
				}
				++argc;
			}
			while ( *bufp && ( *bufp != '"' || *lastp == '\\' ) ) {
				lastp = bufp;
				++bufp;
			}
		} else {
			if ( *bufp ) {
				if ( argv ) {
					argv[argc] = bufp;
				}
				++argc;
			}
			while ( *bufp && ! isspace(*bufp) ) {
				++bufp;
			}
		}
		if ( *bufp ) {
			if ( argv ) {
				*bufp = '\0';
			}
			++bufp;
		}
		if( argv && last_argc != argc ) {
			UnEscapeQuotes( argv[last_argc] );
		}
		last_argc = argc;
	}
	if ( argv ) {
		argv[argc] = NULL;
	}
	return(argc);
}

/*
================================================================================

OpenGL-ES Utility Functions

================================================================================
*/

typedef struct
{
	bool multi_view;						// GL_OVR_multiview, GL_OVR_multiview2
	bool EXT_texture_border_clamp;			// GL_EXT_texture_border_clamp, GL_OES_texture_border_clamp
} OpenGLExtensions_t;

OpenGLExtensions_t glExtensions;

static void EglInitExtensions()
{
#if defined EGL_SYNC
	eglCreateSyncKHR		= (PFNEGLCREATESYNCKHRPROC)			eglGetProcAddress( "eglCreateSyncKHR" );
	eglDestroySyncKHR		= (PFNEGLDESTROYSYNCKHRPROC)		eglGetProcAddress( "eglDestroySyncKHR" );
	eglClientWaitSyncKHR	= (PFNEGLCLIENTWAITSYNCKHRPROC)		eglGetProcAddress( "eglClientWaitSyncKHR" );
	eglSignalSyncKHR		= (PFNEGLSIGNALSYNCKHRPROC)			eglGetProcAddress( "eglSignalSyncKHR" );
	eglGetSyncAttribKHR		= (PFNEGLGETSYNCATTRIBKHRPROC)		eglGetProcAddress( "eglGetSyncAttribKHR" );
#endif

	const char * allExtensions = (const char *)glGetString( GL_EXTENSIONS );
	if ( allExtensions != NULL )
	{
		glExtensions.multi_view = strstr( allExtensions, "GL_OVR_multiview2" ) &&
								  strstr( allExtensions, "GL_OVR_multiview_multisampled_render_to_texture" );

		glExtensions.EXT_texture_border_clamp = strstr( allExtensions, "GL_EXT_texture_border_clamp" ) ||
												strstr( allExtensions, "GL_OES_texture_border_clamp" );
	}
}

static const char * EglErrorString( const EGLint error )
{
	switch ( error )
	{
		case EGL_SUCCESS:				return "EGL_SUCCESS";
		case EGL_NOT_INITIALIZED:		return "EGL_NOT_INITIALIZED";
		case EGL_BAD_ACCESS:			return "EGL_BAD_ACCESS";
		case EGL_BAD_ALLOC:				return "EGL_BAD_ALLOC";
		case EGL_BAD_ATTRIBUTE:			return "EGL_BAD_ATTRIBUTE";
		case EGL_BAD_CONTEXT:			return "EGL_BAD_CONTEXT";
		case EGL_BAD_CONFIG:			return "EGL_BAD_CONFIG";
		case EGL_BAD_CURRENT_SURFACE:	return "EGL_BAD_CURRENT_SURFACE";
		case EGL_BAD_DISPLAY:			return "EGL_BAD_DISPLAY";
		case EGL_BAD_SURFACE:			return "EGL_BAD_SURFACE";
		case EGL_BAD_MATCH:				return "EGL_BAD_MATCH";
		case EGL_BAD_PARAMETER:			return "EGL_BAD_PARAMETER";
		case EGL_BAD_NATIVE_PIXMAP:		return "EGL_BAD_NATIVE_PIXMAP";
		case EGL_BAD_NATIVE_WINDOW:		return "EGL_BAD_NATIVE_WINDOW";
		case EGL_CONTEXT_LOST:			return "EGL_CONTEXT_LOST";
		default:						return "unknown";
	}
}

static const char * GlFrameBufferStatusString( GLenum status )
{
	switch ( status )
	{
		case GL_FRAMEBUFFER_UNDEFINED:						return "GL_FRAMEBUFFER_UNDEFINED";
		case GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT:			return "GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT";
		case GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT:	return "GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT";
		case GL_FRAMEBUFFER_UNSUPPORTED:					return "GL_FRAMEBUFFER_UNSUPPORTED";
		case GL_FRAMEBUFFER_INCOMPLETE_MULTISAMPLE:			return "GL_FRAMEBUFFER_INCOMPLETE_MULTISAMPLE";
		default:											return "unknown";
	}
}


/*
================================================================================

ovrEgl

================================================================================
*/

typedef struct
{
	EGLint		MajorVersion;
	EGLint		MinorVersion;
	EGLDisplay	Display;
	EGLConfig	Config;
	EGLSurface	TinySurface;
	EGLSurface	MainSurface;
	EGLContext	Context;
} ovrEgl;

static void ovrEgl_Clear( ovrEgl * egl )
{
	egl->MajorVersion = 0;
	egl->MinorVersion = 0;
	egl->Display = 0;
	egl->Config = 0;
	egl->TinySurface = EGL_NO_SURFACE;
	egl->MainSurface = EGL_NO_SURFACE;
	egl->Context = EGL_NO_CONTEXT;
}

static void ovrEgl_CreateContext( ovrEgl * egl, const ovrEgl * shareEgl )
{
	if ( egl->Display != 0 )
	{
		return;
	}

	egl->Display = eglGetDisplay( EGL_DEFAULT_DISPLAY );
	eglInitialize( egl->Display, &egl->MajorVersion, &egl->MinorVersion );
	// Do NOT use eglChooseConfig, because the Android EGL code pushes in multisample
	// flags in eglChooseConfig if the user has selected the "force 4x MSAA" option in
	// settings, and that is completely wasted for our warp target.
	const int MAX_CONFIGS = 1024;
	EGLConfig configs[MAX_CONFIGS];
	EGLint numConfigs = 0;
	if ( eglGetConfigs( egl->Display, configs, MAX_CONFIGS, &numConfigs ) == EGL_FALSE )
	{
		ALOGE( "        eglGetConfigs() failed: %s", EglErrorString( eglGetError() ) );
		return;
	}
	const EGLint configAttribs[] =
	{
		EGL_RED_SIZE,		8,
		EGL_GREEN_SIZE,		8,
		EGL_BLUE_SIZE,		8,
		EGL_ALPHA_SIZE,		8, // need alpha for the multi-pass timewarp compositor
		EGL_DEPTH_SIZE,		24,
		EGL_STENCIL_SIZE,	8,
		EGL_SAMPLES,		0,
		EGL_NONE
	};
	egl->Config = 0;
	for ( int i = 0; i < numConfigs; i++ )
	{
		EGLint value = 0;

		eglGetConfigAttrib( egl->Display, configs[i], EGL_RENDERABLE_TYPE, &value );
		if ( ( value & EGL_OPENGL_ES3_BIT_KHR ) != EGL_OPENGL_ES3_BIT_KHR )
		{
			continue;
		}

		// The pbuffer config also needs to be compatible with normal window rendering
		// so it can share textures with the window context.
		eglGetConfigAttrib( egl->Display, configs[i], EGL_SURFACE_TYPE, &value );
		if ( ( value & ( EGL_WINDOW_BIT | EGL_PBUFFER_BIT ) ) != ( EGL_WINDOW_BIT | EGL_PBUFFER_BIT ) )
		{
			continue;
		}

		int	j = 0;
		for ( ; configAttribs[j] != EGL_NONE; j += 2 )
		{
			eglGetConfigAttrib( egl->Display, configs[i], configAttribs[j], &value );
			if ( value != configAttribs[j + 1] )
			{
				break;
			}
		}
		if ( configAttribs[j] == EGL_NONE )
		{
			egl->Config = configs[i];
			break;
		}
	}
	if ( egl->Config == 0 )
	{
		ALOGE( "        eglChooseConfig() failed: %s", EglErrorString( eglGetError() ) );
		return;
	}
	EGLint contextAttribs[] =
	{
		EGL_CONTEXT_CLIENT_VERSION, 3,
		EGL_NONE
	};
	ALOGV( "        Context = eglCreateContext( Display, Config, EGL_NO_CONTEXT, contextAttribs )" );
	egl->Context = eglCreateContext( egl->Display, egl->Config, ( shareEgl != NULL ) ? shareEgl->Context : EGL_NO_CONTEXT, contextAttribs );
	if ( egl->Context == EGL_NO_CONTEXT )
	{
		ALOGE( "        eglCreateContext() failed: %s", EglErrorString( eglGetError() ) );
		return;
	}
	const EGLint surfaceAttribs[] =
	{
		EGL_WIDTH, 16,
		EGL_HEIGHT, 16,
		EGL_NONE
	};
	ALOGV( "        TinySurface = eglCreatePbufferSurface( Display, Config, surfaceAttribs )" );
	egl->TinySurface = eglCreatePbufferSurface( egl->Display, egl->Config, surfaceAttribs );
	if ( egl->TinySurface == EGL_NO_SURFACE )
	{
		ALOGE( "        eglCreatePbufferSurface() failed: %s", EglErrorString( eglGetError() ) );
		eglDestroyContext( egl->Display, egl->Context );
		egl->Context = EGL_NO_CONTEXT;
		return;
	}
	ALOGV( "        eglMakeCurrent( Display, TinySurface, TinySurface, Context )" );
	if ( eglMakeCurrent( egl->Display, egl->TinySurface, egl->TinySurface, egl->Context ) == EGL_FALSE )
	{
		ALOGE( "        eglMakeCurrent() failed: %s", EglErrorString( eglGetError() ) );
		eglDestroySurface( egl->Display, egl->TinySurface );
		eglDestroyContext( egl->Display, egl->Context );
		egl->Context = EGL_NO_CONTEXT;
		return;
	}
}

static void ovrEgl_DestroyContext( ovrEgl * egl )
{
	if ( egl->Display != 0 )
	{
		ALOGE( "        eglMakeCurrent( Display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT )" );
		if ( eglMakeCurrent( egl->Display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT ) == EGL_FALSE )
		{
			ALOGE( "        eglMakeCurrent() failed: %s", EglErrorString( eglGetError() ) );
		}
	}
	if ( egl->Context != EGL_NO_CONTEXT )
	{
		ALOGE( "        eglDestroyContext( Display, Context )" );
		if ( eglDestroyContext( egl->Display, egl->Context ) == EGL_FALSE )
		{
			ALOGE( "        eglDestroyContext() failed: %s", EglErrorString( eglGetError() ) );
		}
		egl->Context = EGL_NO_CONTEXT;
	}
	if ( egl->TinySurface != EGL_NO_SURFACE )
	{
		ALOGE( "        eglDestroySurface( Display, TinySurface )" );
		if ( eglDestroySurface( egl->Display, egl->TinySurface ) == EGL_FALSE )
		{
			ALOGE( "        eglDestroySurface() failed: %s", EglErrorString( eglGetError() ) );
		}
		egl->TinySurface = EGL_NO_SURFACE;
	}
	if ( egl->Display != 0 )
	{
		ALOGE( "        eglTerminate( Display )" );
		if ( eglTerminate( egl->Display ) == EGL_FALSE )
		{
			ALOGE( "        eglTerminate() failed: %s", EglErrorString( eglGetError() ) );
		}
		egl->Display = 0;
	}
}

/*
================================================================================

ovrFramebuffer

================================================================================
*/


static void ovrFramebuffer_Clear( ovrFramebuffer * frameBuffer )
{
	frameBuffer->Width = 0;
	frameBuffer->Height = 0;
	frameBuffer->Multisamples = 0;
	frameBuffer->TextureSwapChainLength = 0;
	frameBuffer->ProcessingTextureSwapChainIndex = 0;
	frameBuffer->ReadyTextureSwapChainIndex = 0;
	frameBuffer->ColorTextureSwapChain = NULL;
	frameBuffer->DepthBuffers = NULL;
	frameBuffer->FrameBuffers = NULL;
}

typedef void (GL_APIENTRYP PFNGLRENDERBUFFERSTORAGEMULTISAMPLEEXTPROC) (GLenum target, GLsizei samples, GLenum internalformat, GLsizei width, GLsizei height);
typedef void (GL_APIENTRYP PFNGLFRAMEBUFFERTEXTURE2DMULTISAMPLEEXTPROC) (GLenum target, GLenum attachment, GLenum textarget, GLuint texture, GLint level, GLsizei samples);

#if !defined(GL_OVR_multiview)
/// static const int GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_NUM_VIEWS_OVR       = 0x9630;
/// static const int GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_BASE_VIEW_INDEX_OVR = 0x9632;
/// static const int GL_MAX_VIEWS_OVR                                      = 0x9631;
typedef void(GL_APIENTRY* PFNGLFRAMEBUFFERTEXTUREMULTIVIEWOVRPROC)(
		GLenum target,
		GLenum attachment,
		GLuint texture,
		GLint level,
		GLint baseViewIndex,
		GLsizei numViews);
#endif

#if !defined(GL_OVR_multiview_multisampled_render_to_texture)
typedef void(GL_APIENTRY* PFNGLFRAMEBUFFERTEXTUREMULTISAMPLEMULTIVIEWOVRPROC)(
		GLenum target,
		GLenum attachment,
		GLuint texture,
		GLint level,
		GLsizei samples,
		GLint baseViewIndex,
		GLsizei numViews);
#endif

static bool ovrFramebuffer_Create(
		ovrFramebuffer* frameBuffer,
		const bool useMultiview,
		const GLenum colorFormat,
		const int width,
		const int height,
		const int multisamples) {
	PFNGLRENDERBUFFERSTORAGEMULTISAMPLEEXTPROC glRenderbufferStorageMultisampleEXT =
			(PFNGLRENDERBUFFERSTORAGEMULTISAMPLEEXTPROC)eglGetProcAddress(
					"glRenderbufferStorageMultisampleEXT");
	PFNGLFRAMEBUFFERTEXTURE2DMULTISAMPLEEXTPROC glFramebufferTexture2DMultisampleEXT =
			(PFNGLFRAMEBUFFERTEXTURE2DMULTISAMPLEEXTPROC)eglGetProcAddress(
					"glFramebufferTexture2DMultisampleEXT");

	PFNGLFRAMEBUFFERTEXTUREMULTIVIEWOVRPROC glFramebufferTextureMultiviewOVR =
			(PFNGLFRAMEBUFFERTEXTUREMULTIVIEWOVRPROC)eglGetProcAddress(
					"glFramebufferTextureMultiviewOVR");
	PFNGLFRAMEBUFFERTEXTUREMULTISAMPLEMULTIVIEWOVRPROC glFramebufferTextureMultisampleMultiviewOVR =
			(PFNGLFRAMEBUFFERTEXTUREMULTISAMPLEMULTIVIEWOVRPROC)eglGetProcAddress(
					"glFramebufferTextureMultisampleMultiviewOVR");

	frameBuffer->Width = width;
	frameBuffer->Height = height;
	frameBuffer->Multisamples = multisamples;
	frameBuffer->UseMultiview =
			(useMultiview && (glFramebufferTextureMultiviewOVR != NULL)) ? true : false;

	frameBuffer->ColorTextureSwapChain = vrapi_CreateTextureSwapChain3(
			frameBuffer->UseMultiview ? VRAPI_TEXTURE_TYPE_2D_ARRAY : VRAPI_TEXTURE_TYPE_2D,
			colorFormat,
			width,
			height,
			1,
			3);
	frameBuffer->TextureSwapChainLength =
			vrapi_GetTextureSwapChainLength(frameBuffer->ColorTextureSwapChain);
	frameBuffer->DepthBuffers =
			(GLuint*)malloc(frameBuffer->TextureSwapChainLength * sizeof(GLuint));
	frameBuffer->FrameBuffers =
			(GLuint*)malloc(frameBuffer->TextureSwapChainLength * sizeof(GLuint));

	ALOGV("        frameBuffer->UseMultiview = %d", frameBuffer->UseMultiview);

	for (int i = 0; i < frameBuffer->TextureSwapChainLength; i++) {
		// Create the color buffer texture.
		const GLuint colorTexture =
				vrapi_GetTextureSwapChainHandle(frameBuffer->ColorTextureSwapChain, i);
		GLenum colorTextureTarget = frameBuffer->UseMultiview ? GL_TEXTURE_2D_ARRAY : GL_TEXTURE_2D;
		GL(glBindTexture(colorTextureTarget, colorTexture));
		GL(glTexParameteri(colorTextureTarget, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER));
		GL(glTexParameteri(colorTextureTarget, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER));
		GLfloat borderColor[] = {0.0f, 0.0f, 0.0f, 0.0f};
		GL(glTexParameterfv(colorTextureTarget, GL_TEXTURE_BORDER_COLOR, borderColor));
		GL(glTexParameteri(colorTextureTarget, GL_TEXTURE_MIN_FILTER, GL_LINEAR));
		GL(glTexParameteri(colorTextureTarget, GL_TEXTURE_MAG_FILTER, GL_LINEAR));
		GL(glBindTexture(colorTextureTarget, 0));

		if (frameBuffer->UseMultiview) {
			// Create the depth buffer texture.
			GL(glGenTextures(1, &frameBuffer->DepthBuffers[i]));
			GL(glBindTexture(GL_TEXTURE_2D_ARRAY, frameBuffer->DepthBuffers[i]));
			GL(glTexStorage3D(GL_TEXTURE_2D_ARRAY, 1, GL_DEPTH_COMPONENT24, width, height, 2));
			GL(glBindTexture(GL_TEXTURE_2D_ARRAY, 0));

			// Create the frame buffer.
			GL(glGenFramebuffers(1, &frameBuffer->FrameBuffers[i]));
			GL(glBindFramebuffer(GL_DRAW_FRAMEBUFFER, frameBuffer->FrameBuffers[i]));
			if (multisamples > 1 && (glFramebufferTextureMultisampleMultiviewOVR != NULL)) {
				GL(glFramebufferTextureMultisampleMultiviewOVR(
						GL_DRAW_FRAMEBUFFER,
						GL_DEPTH_ATTACHMENT,
						frameBuffer->DepthBuffers[i],
						0 /* level */,
						multisamples /* samples */,
						0 /* baseViewIndex */,
						2 /* numViews */));
				GL(glFramebufferTextureMultisampleMultiviewOVR(
						GL_DRAW_FRAMEBUFFER,
						GL_COLOR_ATTACHMENT0,
						colorTexture,
						0 /* level */,
						multisamples /* samples */,
						0 /* baseViewIndex */,
						2 /* numViews */));
			} else {
				GL(glFramebufferTextureMultiviewOVR(
						GL_DRAW_FRAMEBUFFER,
						GL_DEPTH_ATTACHMENT,
						frameBuffer->DepthBuffers[i],
						0 /* level */,
						0 /* baseViewIndex */,
						2 /* numViews */));
				GL(glFramebufferTextureMultiviewOVR(
						GL_DRAW_FRAMEBUFFER,
						GL_COLOR_ATTACHMENT0,
						colorTexture,
						0 /* level */,
						0 /* baseViewIndex */,
						2 /* numViews */));
			}

			GL(GLenum renderFramebufferStatus = glCheckFramebufferStatus(GL_DRAW_FRAMEBUFFER));
			GL(glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0));
			if (renderFramebufferStatus != GL_FRAMEBUFFER_COMPLETE) {
				ALOGE(
						"Incomplete frame buffer object: %s",
						GlFrameBufferStatusString(renderFramebufferStatus));
				return false;
			}
		} else {
			if (multisamples > 1 && glRenderbufferStorageMultisampleEXT != NULL &&
				glFramebufferTexture2DMultisampleEXT != NULL) {
				// Create multisampled depth buffer.
				GL(glGenRenderbuffers(1, &frameBuffer->DepthBuffers[i]));
				GL(glBindRenderbuffer(GL_RENDERBUFFER, frameBuffer->DepthBuffers[i]));
				GL(glRenderbufferStorageMultisampleEXT(
						GL_RENDERBUFFER, multisamples, GL_DEPTH_COMPONENT24, width, height));
				GL(glBindRenderbuffer(GL_RENDERBUFFER, 0));

				// Create the frame buffer.
				// NOTE: glFramebufferTexture2DMultisampleEXT only works with GL_FRAMEBUFFER.
				GL(glGenFramebuffers(1, &frameBuffer->FrameBuffers[i]));
				GL(glBindFramebuffer(GL_FRAMEBUFFER, frameBuffer->FrameBuffers[i]));
				GL(glFramebufferTexture2DMultisampleEXT(
						GL_FRAMEBUFFER,
						GL_COLOR_ATTACHMENT0,
						GL_TEXTURE_2D,
						colorTexture,
						0,
						multisamples));
				GL(glFramebufferRenderbuffer(
						GL_FRAMEBUFFER,
						GL_DEPTH_ATTACHMENT,
						GL_RENDERBUFFER,
						frameBuffer->DepthBuffers[i]));
				GL(GLenum renderFramebufferStatus = glCheckFramebufferStatus(GL_FRAMEBUFFER));
				GL(glBindFramebuffer(GL_FRAMEBUFFER, 0));
				if (renderFramebufferStatus != GL_FRAMEBUFFER_COMPLETE) {
					ALOGE(
							"Incomplete frame buffer object: %s",
							GlFrameBufferStatusString(renderFramebufferStatus));
					return false;
				}
			} else {
				// Create depth buffer.
				GL(glGenRenderbuffers(1, &frameBuffer->DepthBuffers[i]));
				GL(glBindRenderbuffer(GL_RENDERBUFFER, frameBuffer->DepthBuffers[i]));
				GL(glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT24, width, height));
				GL(glBindRenderbuffer(GL_RENDERBUFFER, 0));

				// Create the frame buffer.
				GL(glGenFramebuffers(1, &frameBuffer->FrameBuffers[i]));
				GL(glBindFramebuffer(GL_DRAW_FRAMEBUFFER, frameBuffer->FrameBuffers[i]));
				GL(glFramebufferRenderbuffer(
						GL_DRAW_FRAMEBUFFER,
						GL_DEPTH_ATTACHMENT,
						GL_RENDERBUFFER,
						frameBuffer->DepthBuffers[i]));
				GL(glFramebufferTexture2D(
						GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, colorTexture, 0));
				GL(GLenum renderFramebufferStatus = glCheckFramebufferStatus(GL_DRAW_FRAMEBUFFER));
				GL(glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0));
				if (renderFramebufferStatus != GL_FRAMEBUFFER_COMPLETE) {
					ALOGE(
							"Incomplete frame buffer object: %s",
							GlFrameBufferStatusString(renderFramebufferStatus));
					return false;
				}
			}
		}
	}

	return true;
}

void ovrFramebuffer_Destroy(ovrFramebuffer* frameBuffer) {
	GL(glDeleteFramebuffers(frameBuffer->TextureSwapChainLength, frameBuffer->FrameBuffers));
	if (frameBuffer->UseMultiview) {
		GL(glDeleteTextures(frameBuffer->TextureSwapChainLength, frameBuffer->DepthBuffers));
	} else {
		GL(glDeleteRenderbuffers(frameBuffer->TextureSwapChainLength, frameBuffer->DepthBuffers));
	}
	vrapi_DestroyTextureSwapChain(frameBuffer->ColorTextureSwapChain);

	free(frameBuffer->DepthBuffers);
	free(frameBuffer->FrameBuffers);

	ovrFramebuffer_Clear(frameBuffer);
}

void ovrFramebuffer_SetCurrent( ovrFramebuffer * frameBuffer )
{
	GL( glBindFramebuffer( GL_FRAMEBUFFER, frameBuffer->FrameBuffers[frameBuffer->ProcessingTextureSwapChainIndex] ) );
}

void ovrFramebuffer_SetNone()
{
	GL( glBindFramebuffer( GL_DRAW_FRAMEBUFFER, 0 ) );
}

void ovrFramebuffer_Resolve( ovrFramebuffer * frameBuffer )
{
	// Discard the depth buffer, so the tiler won't need to write it back out to memory.
	const GLenum depthAttachment[1] = { GL_DEPTH_ATTACHMENT };
	glInvalidateFramebuffer( GL_DRAW_FRAMEBUFFER, 1, depthAttachment );
}

void ovrFramebuffer_Advance( ovrFramebuffer * frameBuffer )
{
	// Advance to the next texture from the set.
    frameBuffer->ReadyTextureSwapChainIndex = frameBuffer->ProcessingTextureSwapChainIndex;
	frameBuffer->ProcessingTextureSwapChainIndex = ( frameBuffer->ProcessingTextureSwapChainIndex + 1 ) % frameBuffer->TextureSwapChainLength;
}


void ovrFramebuffer_ClearEdgeTexels( ovrFramebuffer * frameBuffer )
{
	GL( glEnable( GL_SCISSOR_TEST ) );
	GL( glViewport( 0, 0, frameBuffer->Width, frameBuffer->Height ) );

	// Explicitly clear the border texels to black because OpenGL-ES does not support GL_CLAMP_TO_BORDER.
	// Clear to fully opaque black.
	GL( glClearColor( 0.0f, 0.0f, 0.0f, 1.0f ) );

	// bottom
	GL( glScissor( 0, 0, frameBuffer->Width, 1 ) );
	GL( glClear( GL_COLOR_BUFFER_BIT ) );
	// top
	GL( glScissor( 0, frameBuffer->Height - 1, frameBuffer->Width, 1 ) );
	GL( glClear( GL_COLOR_BUFFER_BIT ) );
	// left
	GL( glScissor( 0, 0, 1, frameBuffer->Height ) );
	GL( glClear( GL_COLOR_BUFFER_BIT ) );
	// right
	GL( glScissor( frameBuffer->Width - 1, 0, 1, frameBuffer->Height ) );
	GL( glClear( GL_COLOR_BUFFER_BIT ) );


	GL( glScissor( 0, 0, 0, 0 ) );
	GL( glDisable( GL_SCISSOR_TEST ) );
}


/*
================================================================================

ovrRenderer

================================================================================
*/


void ovrRenderer_Clear( ovrRenderer * renderer )
{
	ovrFramebuffer_Clear( &renderer->FrameBuffer );
	renderer->ProjectionMatrix = ovrMatrix4f_CreateIdentity();
	renderer->NumBuffers = VRAPI_FRAME_LAYER_EYE_MAX;
}

float Doom3Quest_GetFOV();

void ovrRenderer_Create( int width, int height, ovrRenderer * renderer, const ovrJava * java )
{
	renderer->NumBuffers = 1; // Multiview

	//Now using a symmetrical render target, based on the horizontal FOV
	Doom3Quest_GetFOV();

	// Create the multi view frame buffer
	ovrFramebuffer_Create( &renderer->FrameBuffer,
						   true,
						   GL_RGBA8,
						   width,
						   height,
						   NUM_MULTI_SAMPLES );

	// Setup the projection matrix.
	renderer->ProjectionMatrix = ovrMatrix4f_CreateProjectionFov(
			vrFOV, vrFOV, 0.0f, 0.0f, 1.0f, 0.0f );

}

void ovrRenderer_Destroy( ovrRenderer * renderer )
{
	ovrFramebuffer_Destroy( &renderer->FrameBuffer );
	renderer->ProjectionMatrix = ovrMatrix4f_CreateIdentity();
}


#ifndef EPSILON
#define EPSILON 0.001f
#endif

static ovrVector3f normalizeVec(ovrVector3f vec) {
    //NOTE: leave w-component untouched
    //@@const float EPSILON = 0.000001f;
    float xxyyzz = vec.x*vec.x + vec.y*vec.y + vec.z*vec.z;
    //@@if(xxyyzz < EPSILON)
    //@@    return *this; // do nothing if it is zero vector

    //float invLength = invSqrt(xxyyzz);
    ovrVector3f result;
    float invLength = 1.0f / sqrtf(xxyyzz);
    result.x = vec.x * invLength;
    result.y = vec.y * invLength;
    result.z = vec.z * invLength;
    return result;
}

void NormalizeAngles(vec3_t angles)
{
	while (angles[0] >= 90) angles[0] -= 180;
	while (angles[1] >= 180) angles[1] -= 360;
	while (angles[2] >= 180) angles[2] -= 360;
	while (angles[0] < -90) angles[0] += 180;
	while (angles[1] < -180) angles[1] += 360;
	while (angles[2] < -180) angles[2] += 360;
}

void GetAnglesFromVectors(const ovrVector3f forward, const ovrVector3f right, const ovrVector3f up, vec3_t angles)
{
	float sr, sp, sy, cr, cp, cy;

	sp = -forward.z;

	float cp_x_cy = forward.x;
	float cp_x_sy = forward.y;
	float cp_x_sr = -right.z;
	float cp_x_cr = up.z;

	float yaw = atan2(cp_x_sy, cp_x_cy);
	float roll = atan2(cp_x_sr, cp_x_cr);

	cy = cos(yaw);
	sy = sin(yaw);
	cr = cos(roll);
	sr = sin(roll);

	if (fabs(cy) > EPSILON)
	{
	cp = cp_x_cy / cy;
	}
	else if (fabs(sy) > EPSILON)
	{
	cp = cp_x_sy / sy;
	}
	else if (fabs(sr) > EPSILON)
	{
	cp = cp_x_sr / sr;
	}
	else if (fabs(cr) > EPSILON)
	{
	cp = cp_x_cr / cr;
	}
	else
	{
	cp = cos(asin(sp));
	}

	float pitch = atan2(sp, cp);

	angles[0] = pitch / (M_PI*2.f / 360.f);
	angles[1] = yaw / (M_PI*2.f / 360.f);
	angles[2] = roll / (M_PI*2.f / 360.f);

	NormalizeAngles(angles);
}

void QuatToYawPitchRoll(ovrQuatf q, vec3_t rotation, vec3_t out) {

    ovrMatrix4f mat = ovrMatrix4f_CreateFromQuaternion( &q );

    if (rotation[0] != 0.0f || rotation[1] != 0.0f || rotation[2] != 0.0f)
	{
		ovrMatrix4f rot = ovrMatrix4f_CreateRotation(radians(rotation[0]), radians(rotation[1]), radians(rotation[2]));
		mat = ovrMatrix4f_Multiply(&mat, &rot);
	}

    ovrVector4f v1 = {0, 0, -1, 0};
    ovrVector4f v2 = {1, 0, 0, 0};
    ovrVector4f v3 = {0, 1, 0, 0};

    ovrVector4f forwardInVRSpace = ovrVector4f_MultiplyMatrix4f(&mat, &v1);
    ovrVector4f rightInVRSpace = ovrVector4f_MultiplyMatrix4f(&mat, &v2);
    ovrVector4f upInVRSpace = ovrVector4f_MultiplyMatrix4f(&mat, &v3);

	ovrVector3f forward = {-forwardInVRSpace.z, -forwardInVRSpace.x, forwardInVRSpace.y};
	ovrVector3f right = {-rightInVRSpace.z, -rightInVRSpace.x, rightInVRSpace.y};
	ovrVector3f up = {-upInVRSpace.z, -upInVRSpace.x, upInVRSpace.y};

	ovrVector3f forwardNormal = normalizeVec(forward);
	ovrVector3f rightNormal = normalizeVec(right);
	ovrVector3f upNormal = normalizeVec(up);

	GetAnglesFromVectors(forwardNormal, rightNormal, upNormal, out);
	return;
}

void updateHMDOrientation()
{
    //Position
    VectorSubtract(vr.hmdposition_last, vr.hmdposition, vr.hmdposition_delta);

    //Keep this for our records
    VectorCopy(vr.hmdposition, vr.hmdposition_last);
}

void setHMDPosition( float x, float y, float z, float yaw )
{
	VectorSet(vr.hmdposition, x, y, z);
}

void setHMDOrientation( float x, float y, float z, float w )
{
    Vector4Set(vr.hmdorientation_quat, x, y, z, w);
}

void setHMDTranslation( float x, float y, float z)
{
    VectorSet(vr.hmdtranslation, x, y, z);
}


/*
========================
Doom3Quest_Vibrate
========================
*/

//0 = left, 1 = right
float vibration_channel_intensity[2][2] = {{0.0f,0.0f},{0.0f,0.0f}};

void Doom3Quest_Vibrate(int channel, float low, float high)
{
	vibration_channel_intensity[channel][0] = low;
	vibration_channel_intensity[channel][1] = high;
}

void VR_Doom3Main(int argc, char** argv);

void VR_GetMove( float *joy_forward, float *joy_side, float *hmd_forward, float *hmd_side, float *up, float *yaw, float *pitch, float *roll ) {
    *joy_side = remote_movementSideways;
    *joy_forward = remote_movementForward;
    *hmd_forward = positional_movementForward;
    *hmd_side = positional_movementSideways;
    *up = remote_movementUp;
    //*yaw = vr.hmdorientation[YAW] + snapTurn;
    *yaw = snapTurn;
    //*pitch = vr.hmdorientation[PITCH];
    //*roll = vr.hmdorientation[ROLL];}
}

/*
================================================================================

ovrRenderThread

================================================================================
*/


/*
================================================================================

ovrApp

================================================================================
*/

#define MAX_TRACKING_SAMPLES 4

typedef struct
{
	ovrJava				Java;
	ovrEgl				Egl;
	ANativeWindow *		NativeWindow;
	bool				Resumed;
	ovrMobile *			Ovr;
    ovrScene			Scene;
	SDL_mutex *			RenderThreadFrameIndex_Mutex;
	long long			RenderThreadFrameIndex;
	long long			MainThreadFrameIndex;
	double 				DisplayTime[MAX_TRACKING_SAMPLES];
    ovrTracking2        Tracking[MAX_TRACKING_SAMPLES];
	int					SwapInterval;
	int					CpuLevel;
	int					GpuLevel;
	int					MainThreadTid;
	int					RenderThreadTid;
	ovrLayer_Union2		Layers[ovrMaxLayerCount];
	int					LayerCount;
	ovrRenderer			Renderer;
} ovrApp;

static void ovrApp_Clear( ovrApp * app )
{
	app->Java.Vm = NULL;
	app->Java.Env = NULL;
	app->Java.ActivityObject = NULL;
	app->Ovr = NULL;
	app->RenderThreadFrameIndex_Mutex = SDL_CreateMutex();
    app->RenderThreadFrameIndex = 1;
    app->MainThreadFrameIndex = 1;
    memset(app->DisplayTime, 0, MAX_TRACKING_SAMPLES * sizeof(double));
    memset(app->Tracking, 0, MAX_TRACKING_SAMPLES * sizeof(ovrTracking2));
	app->SwapInterval = 1;
	app->CpuLevel = CPU_LEVEL;
	app->GpuLevel = GPU_LEVEL;
	app->MainThreadTid = 0;
	app->RenderThreadTid = 0;

	ovrEgl_Clear( &app->Egl );

	ovrScene_Clear( &app->Scene );
	ovrRenderer_Clear( &app->Renderer );
}

static ovrApp gAppState;
static ovrJava java;
static bool destroyed = false;

float Doom3Quest_GetFOV()
{
	vrFOV = vrapi_GetSystemPropertyInt(&gAppState.Java, VRAPI_SYS_PROP_SUGGESTED_EYE_FOV_DEGREES_Y);

	return vrFOV;
}

int Doom3Quest_GetRefresh()
{
	return Doom3Quest_initialised ? vrapi_GetSystemPropertyInt(&gAppState.Java, VRAPI_SYS_PROP_DISPLAY_REFRESH_RATE) : 60;
}

static void ovrApp_HandleVrModeChanges( ovrApp * app )
{
	if ( app->Resumed != false && app->NativeWindow != NULL )
	{
		if ( app->Ovr == NULL )
		{
            ovrJava sJava = java;
            sJava.Env = NULL;
            (*sJava.Vm)->AttachCurrentThread(sJava.Vm, &sJava.Env, NULL);

			ovrModeParms parms = vrapi_DefaultModeParms( &sJava );
			// Must reset the FLAG_FULLSCREEN window flag when using a SurfaceView
			parms.Flags |= VRAPI_MODE_FLAG_RESET_WINDOW_FULLSCREEN;

			parms.Flags |= VRAPI_MODE_FLAG_NATIVE_WINDOW;
			parms.Display = (size_t)app->Egl.Display;
			parms.WindowSurface = (size_t)app->NativeWindow;
			parms.ShareContext = (size_t)app->Egl.Context;

			ALOGV( "        eglGetCurrentSurface( EGL_DRAW ) = %p", eglGetCurrentSurface( EGL_DRAW ) );

			ALOGV( "        vrapi_EnterVrMode()" );

			app->Ovr = vrapi_EnterVrMode( &parms );

			ALOGV( "        eglGetCurrentSurface( EGL_DRAW ) = %p", eglGetCurrentSurface( EGL_DRAW ) );

			// If entering VR mode failed then the ANativeWindow was not valid.
			if ( app->Ovr == NULL )
			{
				ALOGE( "Invalid ANativeWindow!" );
				app->NativeWindow = NULL;
			}

			// Set performance parameters once we have entered VR mode and have a valid ovrMobile.
			if ( app->Ovr != NULL )
			{
				vrapi_SetClockLevels( app->Ovr, app->CpuLevel, app->GpuLevel );

				ALOGV( "		vrapi_SetClockLevels( %d, %d )", app->CpuLevel, app->GpuLevel );

				vrapi_SetPerfThread( app->Ovr, VRAPI_PERF_THREAD_TYPE_MAIN, app->MainThreadTid );

				ALOGV( "		vrapi_SetPerfThread( MAIN, %d )", app->MainThreadTid );

				vrapi_SetPerfThread( app->Ovr, VRAPI_PERF_THREAD_TYPE_RENDERER, app->RenderThreadTid );

				ALOGV( "		vrapi_SetPerfThread( RENDERER, %d )", app->RenderThreadTid );

                vrapi_SetExtraLatencyMode(app->Ovr, VRAPI_EXTRA_LATENCY_MODE_ON);
			}

		}
	}
	else
	{
		if ( app->Ovr != NULL )
		{
			ALOGV( "        eglGetCurrentSurface( EGL_DRAW ) = %p", eglGetCurrentSurface( EGL_DRAW ) );

			ALOGV( "        vrapi_LeaveVrMode()" );

			vrapi_LeaveVrMode( app->Ovr );
			app->Ovr = NULL;

			ALOGV( "        eglGetCurrentSurface( EGL_DRAW ) = %p", eglGetCurrentSurface( EGL_DRAW ) );
		}
	}
}


/*
================================================================================

ovrMessageQueue

================================================================================
*/

typedef enum
{
	MQ_WAIT_NONE,		// don't wait
	MQ_WAIT_RECEIVED,	// wait until the consumer thread has received the message
	MQ_WAIT_PROCESSED	// wait until the consumer thread has processed the message
} ovrMQWait;

#define MAX_MESSAGE_PARMS	8
#define MAX_MESSAGES		1024

typedef struct
{
	int			Id;
	ovrMQWait	Wait;
	long long	Parms[MAX_MESSAGE_PARMS];
} ovrMessage;

static void ovrMessage_Init( ovrMessage * message, const int id, const int wait )
{
	message->Id = id;
	message->Wait = wait;
	memset( message->Parms, 0, sizeof( message->Parms ) );
}

static void		ovrMessage_SetPointerParm( ovrMessage * message, int index, void * ptr ) { *(void **)&message->Parms[index] = ptr; }
static void *	ovrMessage_GetPointerParm( ovrMessage * message, int index ) { return *(void **)&message->Parms[index]; }
static void		ovrMessage_SetIntegerParm( ovrMessage * message, int index, int value ) { message->Parms[index] = value; }
static int		ovrMessage_GetIntegerParm( ovrMessage * message, int index ) { return (int)message->Parms[index]; }
static void		ovrMessage_SetFloatParm( ovrMessage * message, int index, float value ) { *(float *)&message->Parms[index] = value; }
static float	ovrMessage_GetFloatParm( ovrMessage * message, int index ) { return *(float *)&message->Parms[index]; }

// Cyclic queue with messages.
typedef struct
{
	ovrMessage	 		Messages[MAX_MESSAGES];
	volatile int		Head;	// dequeue at the head
	volatile int		Tail;	// enqueue at the tail
	ovrMQWait			Wait;
	volatile bool		EnabledFlag;
	volatile bool		PostedFlag;
	volatile bool		ReceivedFlag;
	volatile bool		ProcessedFlag;
	pthread_mutex_t		Mutex;
	pthread_cond_t		PostedCondition;
	pthread_cond_t		ReceivedCondition;
	pthread_cond_t		ProcessedCondition;
} ovrMessageQueue;

static void ovrMessageQueue_Create( ovrMessageQueue * messageQueue )
{
	messageQueue->Head = 0;
	messageQueue->Tail = 0;
	messageQueue->Wait = MQ_WAIT_NONE;
	messageQueue->EnabledFlag = false;
	messageQueue->PostedFlag = false;
	messageQueue->ReceivedFlag = false;
	messageQueue->ProcessedFlag = false;

	pthread_mutexattr_t	attr;
	pthread_mutexattr_init( &attr );
	pthread_mutexattr_settype( &attr, PTHREAD_MUTEX_ERRORCHECK );
	pthread_mutex_init( &messageQueue->Mutex, &attr );
	pthread_mutexattr_destroy( &attr );
	pthread_cond_init( &messageQueue->PostedCondition, NULL );
	pthread_cond_init( &messageQueue->ReceivedCondition, NULL );
	pthread_cond_init( &messageQueue->ProcessedCondition, NULL );
}

static void ovrMessageQueue_Destroy( ovrMessageQueue * messageQueue )
{
	pthread_mutex_destroy( &messageQueue->Mutex );
	pthread_cond_destroy( &messageQueue->PostedCondition );
	pthread_cond_destroy( &messageQueue->ReceivedCondition );
	pthread_cond_destroy( &messageQueue->ProcessedCondition );
}

static void ovrMessageQueue_Enable( ovrMessageQueue * messageQueue, const bool set )
{
	messageQueue->EnabledFlag = set;
}

static void ovrMessageQueue_PostMessage( ovrMessageQueue * messageQueue, const ovrMessage * message )
{
	if ( !messageQueue->EnabledFlag )
	{
		return;
	}
	while ( messageQueue->Tail - messageQueue->Head >= MAX_MESSAGES )
	{
		usleep( 1000 );
	}
	pthread_mutex_lock( &messageQueue->Mutex );
	messageQueue->Messages[messageQueue->Tail & ( MAX_MESSAGES - 1 )] = *message;
	messageQueue->Tail++;
	messageQueue->PostedFlag = true;
	pthread_cond_broadcast( &messageQueue->PostedCondition );
	if ( message->Wait == MQ_WAIT_RECEIVED )
	{
		while ( !messageQueue->ReceivedFlag )
		{
			pthread_cond_wait( &messageQueue->ReceivedCondition, &messageQueue->Mutex );
		}
		messageQueue->ReceivedFlag = false;
	}
	else if ( message->Wait == MQ_WAIT_PROCESSED )
	{
		while ( !messageQueue->ProcessedFlag )
		{
			pthread_cond_wait( &messageQueue->ProcessedCondition, &messageQueue->Mutex );
		}
		messageQueue->ProcessedFlag = false;
	}
	pthread_mutex_unlock( &messageQueue->Mutex );
}

static void ovrMessageQueue_SleepUntilMessage( ovrMessageQueue * messageQueue )
{
	if ( messageQueue->Wait == MQ_WAIT_PROCESSED )
	{
		messageQueue->ProcessedFlag = true;
		pthread_cond_broadcast( &messageQueue->ProcessedCondition );
		messageQueue->Wait = MQ_WAIT_NONE;
	}
	pthread_mutex_lock( &messageQueue->Mutex );
	if ( messageQueue->Tail > messageQueue->Head )
	{
		pthread_mutex_unlock( &messageQueue->Mutex );
		return;
	}
	while ( !messageQueue->PostedFlag )
	{
		pthread_cond_wait( &messageQueue->PostedCondition, &messageQueue->Mutex );
	}
	messageQueue->PostedFlag = false;
	pthread_mutex_unlock( &messageQueue->Mutex );
}

static bool ovrMessageQueue_GetNextMessage( ovrMessageQueue * messageQueue, ovrMessage * message, bool waitForMessages )
{
	if ( messageQueue->Wait == MQ_WAIT_PROCESSED )
	{
		messageQueue->ProcessedFlag = true;
		pthread_cond_broadcast( &messageQueue->ProcessedCondition );
		messageQueue->Wait = MQ_WAIT_NONE;
	}
	if ( waitForMessages )
	{
		ovrMessageQueue_SleepUntilMessage( messageQueue );
	}
	pthread_mutex_lock( &messageQueue->Mutex );
	if ( messageQueue->Tail <= messageQueue->Head )
	{
		pthread_mutex_unlock( &messageQueue->Mutex );
		return false;
	}
	*message = messageQueue->Messages[messageQueue->Head & ( MAX_MESSAGES - 1 )];
	messageQueue->Head++;
	pthread_mutex_unlock( &messageQueue->Mutex );
	if ( message->Wait == MQ_WAIT_RECEIVED )
	{
		messageQueue->ReceivedFlag = true;
		pthread_cond_broadcast( &messageQueue->ReceivedCondition );
	}
	else if ( message->Wait == MQ_WAIT_PROCESSED )
	{
		messageQueue->Wait = MQ_WAIT_PROCESSED;
	}
	return true;
}

/*
================================================================================

ovrAppThread

================================================================================
*/

enum
{
	MESSAGE_ON_CREATE,
	MESSAGE_ON_START,
	MESSAGE_ON_RESUME,
	MESSAGE_ON_PAUSE,
	MESSAGE_ON_STOP,
	MESSAGE_ON_DESTROY,
	MESSAGE_ON_SURFACE_CREATED,
	MESSAGE_ON_SURFACE_DESTROYED
};

typedef struct
{
	JavaVM *		JavaVm;
	jobject			ActivityObject;
	jclass          ActivityClass;
	pthread_t		Thread;
	ovrMessageQueue	MessageQueue;
	ANativeWindow * NativeWindow;
} ovrAppThread;

long shutdownCountdown;

int m_width;
int m_height;

void Doom3Quest_GetScreenRes(int *width, int *height)
{
    *width = m_width;
    *height = m_height;
}

void Android_MessageBox(const char *title, const char *text)
{
    ALOGE("%s %s", title, text);
}

//void initialize_gl4es();

void VR_Init()
{
	//Initialise all our variables
	screenYaw = 0.0f;
	remote_movementSideways = 0.0f;
	remote_movementForward = 0.0f;
	remote_movementUp = 0.0f;
	positional_movementSideways = 0.0f;
	positional_movementForward = 0.0f;
	snapTurn = 0.0f;
	vr.visible_hud = true;

	//init randomiser
	srand(time(NULL));

	shutdown = false;
}

long renderThreadCPUTime = 0;

void Doom3Quest_prepareEyeBuffer( )
{
	ovrRenderer *renderer = Doom3Quest_useScreenLayer() ? &gAppState.Scene.CylinderRenderer : &gAppState.Renderer;

	ovrFramebuffer *frameBuffer = &(renderer->FrameBuffer);
	ovrFramebuffer_SetCurrent(frameBuffer);

	renderThreadCPUTime = GetTimeInMilliSeconds();

	GL(glEnable(GL_SCISSOR_TEST));
	GL(glDepthMask(GL_TRUE));
	GL(glEnable(GL_DEPTH_TEST));
	GL(glDepthFunc(GL_LEQUAL));

	//Weusing the size of the render target
	GL(glViewport(0, 0, frameBuffer->Width, frameBuffer->Height));
	GL(glScissor(0, 0, frameBuffer->Width, frameBuffer->Height));

	GL(glClearColor(0.0f, 0.0f, 0.0f, 1.0f));
	GL(glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT));
	GL(glDisable(GL_SCISSOR_TEST));
}

void Doom3Quest_finishEyeBuffer( )
{
    renderThreadCPUTime = GetTimeInMilliSeconds() - renderThreadCPUTime;

    {
        //__android_log_print(ANDROID_LOG_INFO, "Doom3Quest", "RENDER THREAD TOTAL CPU TIME: %ld", renderThreadCPUTime);
    }

    GLCheckErrors( __LINE__ );

	ovrRenderer *renderer = Doom3Quest_useScreenLayer() ? &gAppState.Scene.CylinderRenderer : &gAppState.Renderer;

	ovrFramebuffer *frameBuffer = &(renderer->FrameBuffer);

	//Clear edge to prevent smearing
	ovrFramebuffer_ClearEdgeTexels(frameBuffer);
	ovrFramebuffer_Resolve(frameBuffer);
	ovrFramebuffer_Advance(frameBuffer);

	ovrFramebuffer_SetNone();
}

static ovrAppThread * gAppThread = NULL;

bool Doom3Quest_processMessageQueue() {
	for ( ; ; )
	{
		ovrMessage message;
		const bool waitForMessages = ( gAppState.Ovr == NULL && destroyed == false );
		if ( !ovrMessageQueue_GetNextMessage( &gAppThread->MessageQueue, &message, waitForMessages ) )
		{
			break;
		}

		switch ( message.Id )
		{
			case MESSAGE_ON_CREATE:
			{
				break;
			}
			case MESSAGE_ON_START:
			{
				if (!Doom3Quest_initialised)
				{
					//Set command line arguments here
					if (argc != 0)
					{
						//TODO
					}
					else
					{
						int argc = 1; char *argv[] = { "qzdoom" };

					}

					Doom3Quest_initialised = true;
				}
				break;
			}
			case MESSAGE_ON_RESUME:
			{
				//If we get here, then user has opted not to quit
				gAppState.Resumed = true;
				break;
			}
			case MESSAGE_ON_PAUSE:
			{
				gAppState.Resumed = false;
				break;
			}
			case MESSAGE_ON_STOP:
			{
				break;
			}
			case MESSAGE_ON_DESTROY:
			{
				gAppState.NativeWindow = NULL;
				destroyed = true;
				shutdown = true;
				break;
			}
			case MESSAGE_ON_SURFACE_CREATED:	{ gAppState.NativeWindow = (ANativeWindow *)ovrMessage_GetPointerParm( &message, 0 ); break; }
			case MESSAGE_ON_SURFACE_DESTROYED:	{ gAppState.NativeWindow = NULL; break; }
		}

		ovrApp_HandleVrModeChanges( &gAppState );
	}

	return true;
}


void shutdownVR() {
    SDL_DestroyMutex(gAppState.RenderThreadFrameIndex_Mutex);
	ovrRenderer_Destroy( &gAppState.Renderer );
	ovrEgl_DestroyContext( &gAppState.Egl );
	(*java.Vm)->DetachCurrentThread( java.Vm );
	vrapi_Shutdown();
}

void showLoadingIcon();
void jni_shutdown();

/* Called before SDL_main() to initialize JNI bindings in SDL library */
extern void SDL_Android_Init(JNIEnv* env, jclass cls);

//Calld on the main thread before the rendering thread is started
void DeactivateContext()
{
    eglMakeCurrent( gAppState.Egl.Display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT );
}

//Caled by the rendering thread to take charge of the context
void ActivateContext()
{
    eglMakeCurrent( gAppState.Egl.Display, gAppState.Egl.TinySurface, gAppState.Egl.TinySurface, gAppState.Egl.Context );

    gAppState.RenderThreadTid = gettid();
}

int questType;

void * AppThreadFunction(void * parm ) {
	gAppThread = (ovrAppThread *) parm;

	java.Vm = gAppThread->JavaVm;
	(*java.Vm)->AttachCurrentThread(java.Vm, &java.Env, NULL);
	java.ActivityObject = gAppThread->ActivityObject;

	jclass cls = (*java.Env)->GetObjectClass(java.Env, java.ActivityObject);

    /* This interface could expand with ABI negotiation, callbacks, etc. */
    SDL_Android_Init(java.Env, cls);

    SDL_SetMainReady();

    pVRClientInfo = &vr;

	// Note that AttachCurrentThread will reset the thread name.
	prctl(PR_SET_NAME, (long) "OVR::Main", 0, 0, 0);

	Doom3Quest_initialised = false;

	const ovrInitParms initParms = vrapi_DefaultInitParms(&java);
	int32_t initResult = vrapi_Initialize(&initParms);
	if (initResult != VRAPI_INITIALIZE_SUCCESS) {
		// If intialization failed, vrapi_* function calls will not be available.
		exit(0);
	}

    VR_Init();

	ovrApp_Clear(&gAppState);
	gAppState.Java = java;

	gAppState.CpuLevel = CPU_LEVEL;
	gAppState.GpuLevel = GPU_LEVEL;
	gAppState.MainThreadTid = gettid();

	ovrEgl_CreateContext(&gAppState.Egl, NULL);

	EglInitExtensions();

    chdir("/sdcard/Doom3Quest");

	// This app will handle android gamepad events itself.
	vrapi_SetPropertyInt(&gAppState.Java, VRAPI_EAT_NATIVE_GAMEPAD_EVENTS, 0);

	//Set device defaults
	if (vrapi_GetSystemPropertyInt(&java, VRAPI_SYS_PROP_DEVICE_TYPE) == VRAPI_DEVICE_TYPE_OCULUSQUEST)
	{
		questType = 1;
        DISPLAY_REFRESH = 60; // Fixed to 60 for oculus 1
		if (SS_MULTIPLIER == -1.0f)
		{
			SS_MULTIPLIER = 1.0f;
		}

		if (NUM_MULTI_SAMPLES == -1)
		{
			NUM_MULTI_SAMPLES = 1;
		}
	}
	else
	{
		questType = 2;
		if (SS_MULTIPLIER == -1.0f)
		{
			SS_MULTIPLIER = 1.1f;
		}

		if (NUM_MULTI_SAMPLES == -1)
		{
			NUM_MULTI_SAMPLES = 1;
		}
	}

	//Using a symmetrical render target
	m_height = m_width = (int)(vrapi_GetSystemPropertyInt(&java, VRAPI_SYS_PROP_SUGGESTED_EYE_TEXTURE_WIDTH) *  SS_MULTIPLIER);

    //First handle any messages in the queue
    while ( gAppState.Ovr == NULL ) {
        Doom3Quest_processMessageQueue();
    }

    ovrRenderer_Create(m_width, m_height, &gAppState.Renderer, &java);

    if ( gAppState.Ovr == NULL )
    {
        return NULL;
    }

    // Create the scene if not yet created.
    ovrScene_Create( m_width, m_height, &gAppState.Scene, &java );

    //Run loading loop until we are ready to start QzDoom
    while (!destroyed && !Doom3Quest_initialised) {
        Doom3Quest_processMessageQueue();
        Doom3Quest_getHMDOrientation();
        showLoadingIcon();
    }

    if (DISPLAY_REFRESH != -1)
    {
        vrapi_SetDisplayRefreshRate(gAppState.Ovr, DISPLAY_REFRESH);
    }

    //Should now be all set up and ready - start the Doom3 main loop
    VR_Doom3Main(argc, argv);

    //Take the context back
    ActivateContext();

	//We are done, shutdown cleanly
	shutdownVR();

	//Ask Java to shut down
    jni_shutdown();

	return NULL;
}

//All the stuff we want to do each frame
void Doom3Quest_FrameSetup(int controlscheme)
{
	//Use floor based tracking space
	vrapi_SetTrackingSpace(gAppState.Ovr, VRAPI_TRACKING_SPACE_LOCAL_FLOOR);

	if (!Doom3Quest_useScreenLayer())
	{
		screenYaw = vr.hmdorientation_temp[YAW];
	}

    Doom3Quest_processHaptics();
    Doom3Quest_getHMDOrientation();
    Doom3Quest_getTrackedRemotesOrientation(controlscheme);
}

/*void Doom3Quest_processHaptics() {//Handle haptics
	static float lastFrameTime = 0.0f;
	float timestamp = (float)(GetTimeInMilliSeconds());
	float frametime = timestamp - lastFrameTime;
	lastFrameTime = timestamp;

	for (int i = 0; i < 2; ++i) {
		if (vibration_channel_duration[i] > 0.0f ||
			vibration_channel_duration[i] == -1.0f) {
			vrapi_SetHapticVibrationSimple(gAppState.Ovr, controllerIDs[i],
										   vibration_channel_intensity[i]);

			if (vibration_channel_duration[i] != -1.0f) {
				vibration_channel_duration[i] -= frametime;

				if (vibration_channel_duration[i] < 0.0f) {
					vibration_channel_duration[i] = 0.0f;
					vibration_channel_intensity[i] = 0.0f;
				}
			}
		} else {
			vrapi_SetHapticVibrationSimple(gAppState.Ovr, controllerIDs[i], 0.0f);
		}
	}
}*/

void Doom3Quest_processHaptics() {//Handle haptics

	float beat;
	bool enable;
	for (int h = 0; h < 2; ++h) {
		beat = fabs( vibration_channel_intensity[h][0] - vibration_channel_intensity[h][1] ) / 65535;
		if(beat > 0.0f)
			vrapi_SetHapticVibrationSimple(gAppState.Ovr, controllerIDs[1 - h], beat);
		else
			vrapi_SetHapticVibrationSimple(gAppState.Ovr, controllerIDs[1 - h], 0.0f);
	}
}

void showLoadingIcon()
{
	int frameFlags = 0;
	frameFlags |= VRAPI_FRAME_FLAG_FLUSH;

	ovrLayerProjection2 blackLayer = vrapi_DefaultLayerBlackProjection2();
	blackLayer.Header.Flags |= VRAPI_FRAME_LAYER_FLAG_INHIBIT_SRGB_FRAMEBUFFER;

	ovrLayerLoadingIcon2 iconLayer = vrapi_DefaultLayerLoadingIcon2();
	iconLayer.Header.Flags |= VRAPI_FRAME_LAYER_FLAG_INHIBIT_SRGB_FRAMEBUFFER;

	const ovrLayerHeader2 * layers[] =
	{
		&blackLayer.Header,
		&iconLayer.Header,
	};

	ovrSubmitFrameDescription2 frameDesc = {};
	{
		SDL_LockMutex(gAppState.RenderThreadFrameIndex_Mutex);

		frameDesc.Flags = frameFlags;
		frameDesc.SwapInterval = 1;
		frameDesc.FrameIndex = gAppState.RenderThreadFrameIndex;
		frameDesc.DisplayTime = gAppState.DisplayTime[gAppState.RenderThreadFrameIndex %
													  MAX_TRACKING_SAMPLES];
		frameDesc.LayerCount = 2;
		frameDesc.Layers = layers;

		gAppState.RenderThreadFrameIndex++;

		SDL_UnlockMutex(gAppState.RenderThreadFrameIndex_Mutex);
	}

	vrapi_SubmitFrame2( gAppState.Ovr, &frameDesc );
}

void Doom3Quest_getHMDOrientation() {

	//Update the main thread frame index in a thread safe way
	{
		SDL_LockMutex(gAppState.RenderThreadFrameIndex_Mutex);

		gAppState.MainThreadFrameIndex = gAppState.RenderThreadFrameIndex + 1;

		SDL_UnlockMutex(gAppState.RenderThreadFrameIndex_Mutex);
	}

    gAppState.DisplayTime[gAppState.MainThreadFrameIndex % MAX_TRACKING_SAMPLES] = vrapi_GetPredictedDisplayTime(gAppState.Ovr, gAppState.MainThreadFrameIndex);

    ovrTracking2 *tracking = &gAppState.Tracking[gAppState.MainThreadFrameIndex % MAX_TRACKING_SAMPLES];
	*tracking = vrapi_GetPredictedTracking2(gAppState.Ovr, gAppState.DisplayTime[gAppState.MainThreadFrameIndex % MAX_TRACKING_SAMPLES]);

	//Don't update game with tracking if we are in big screen mode
    //GB Do pass the stuff but block at my end (if big screen prompt is needed)
    const ovrQuatf quatHmd = tracking->HeadPose.Pose.Orientation;
    const ovrVector3f positionHmd = tracking->HeadPose.Pose.Position;
    //const ovrVector3f translationHmd = tracking->HeadPose.Pose.Translation;
    vec3_t rotation = {0};
    QuatToYawPitchRoll(quatHmd, rotation, vr.hmdorientation_temp);
    setHMDPosition(positionHmd.x, positionHmd.y, positionHmd.z, 0);
    //GB
    setHMDOrientation(quatHmd.x, quatHmd.y, quatHmd.z, quatHmd.w);
    //setHMDTranslation(translationHmd.x, translationHmd.y, translationHmd.z);
    //End GB
    updateHMDOrientation();
}

void Doom3Quest_getTrackedRemotesOrientation(int controlscheme) {

    //Get info for tracked remotes
    acquireTrackedRemotesData(gAppState.Ovr, gAppState.DisplayTime[gAppState.MainThreadFrameIndex % MAX_TRACKING_SAMPLES]);

    //Call additional control schemes here
    if (controlscheme == RIGHT_HANDED_DEFAULT) {
		HandleInput_Default(controlscheme, &rightTrackedRemoteState_new,
							&rightTrackedRemoteState_old, &rightRemoteTracking_new,
							&leftTrackedRemoteState_new, &leftTrackedRemoteState_old,
							&leftRemoteTracking_new,
							ovrButton_A, ovrButton_B, ovrButton_X, ovrButton_Y);
	} else {
		//Left handed
		HandleInput_Default(controlscheme, &leftTrackedRemoteState_new, &leftTrackedRemoteState_old,
							&leftRemoteTracking_new,
							&rightTrackedRemoteState_new, &rightTrackedRemoteState_old,
							&rightRemoteTracking_new,
							ovrButton_X, ovrButton_Y, ovrButton_A, ovrButton_B);
	}
}

void Doom3Quest_submitFrame()
{
    ovrSubmitFrameDescription2 frameDesc = {0};

    long long renderThreadFrameIndex;
	{
		SDL_LockMutex(gAppState.RenderThreadFrameIndex_Mutex);
		renderThreadFrameIndex = gAppState.RenderThreadFrameIndex;
		SDL_UnlockMutex(gAppState.RenderThreadFrameIndex_Mutex);
	}

	if (!Doom3Quest_useScreenLayer()) {

        ovrLayerProjection2 layer = vrapi_DefaultLayerProjection2();
        layer.HeadPose = gAppState.Tracking[renderThreadFrameIndex % MAX_TRACKING_SAMPLES].HeadPose;
        for ( int eye = 0; eye < VRAPI_FRAME_LAYER_EYE_MAX; eye++ )
        {
            ovrFramebuffer * frameBuffer = &gAppState.Renderer.FrameBuffer;
            layer.Textures[eye].ColorSwapChain = frameBuffer->ColorTextureSwapChain;
            layer.Textures[eye].SwapChainIndex = frameBuffer->ReadyTextureSwapChainIndex;

            ovrMatrix4f projectionMatrix;
            projectionMatrix = ovrMatrix4f_CreateProjectionFov(vrFOV, vrFOV,
                                                               0.0f, 0.0f, 0.1f, 0.0f);

            layer.Textures[eye].TexCoordsFromTanAngles = ovrMatrix4f_TanAngleMatrixFromProjection(&projectionMatrix);

            layer.Textures[eye].TextureRect.x = 0;
            layer.Textures[eye].TextureRect.y = 0;
            layer.Textures[eye].TextureRect.width = 1.0f;
            layer.Textures[eye].TextureRect.height = 1.0f;
        }
        layer.Header.Flags |= VRAPI_FRAME_LAYER_FLAG_CHROMATIC_ABERRATION_CORRECTION;

        // Set up the description for this frame.
        const ovrLayerHeader2 *layers[] =
                {
                        &layer.Header
                };

        frameDesc.Flags = 0;
        frameDesc.SwapInterval = gAppState.SwapInterval;
        frameDesc.FrameIndex = renderThreadFrameIndex;
        frameDesc.DisplayTime = gAppState.DisplayTime[renderThreadFrameIndex % MAX_TRACKING_SAMPLES];
        frameDesc.LayerCount = 1;
        frameDesc.Layers = layers;

        // Hand over the eye images to the time warp.
        vrapi_SubmitFrame2(gAppState.Ovr, &frameDesc);

    } else {
        // Set-up the compositor layers for this frame.
        // NOTE: Multiple independent layers are allowed, but they need to be added
        // in a depth consistent order.
        memset( gAppState.Layers, 0, sizeof( ovrLayer_Union2 ) * ovrMaxLayerCount );
        gAppState.LayerCount = 0;

        // Add a simple cylindrical layer
        gAppState.Layers[gAppState.LayerCount++].Cylinder =
                BuildCylinderLayer(&gAppState.Scene.CylinderRenderer,
                                   gAppState.Scene.CylinderWidth, gAppState.Scene.CylinderHeight, &gAppState.Tracking[renderThreadFrameIndex % MAX_TRACKING_SAMPLES], radians(playerYaw) );

        // Compose the layers for this frame.
        const ovrLayerHeader2 * layerHeaders[ovrMaxLayerCount] = { 0 };
        for ( int i = 0; i < gAppState.LayerCount; i++ )
        {
            layerHeaders[i] = &gAppState.Layers[i].Header;
        }

        // Set up the description for this frame.
        frameDesc.Flags = 0;
        frameDesc.SwapInterval = gAppState.SwapInterval;
        frameDesc.FrameIndex = renderThreadFrameIndex;
        frameDesc.DisplayTime = gAppState.DisplayTime[renderThreadFrameIndex % MAX_TRACKING_SAMPLES];
        frameDesc.LayerCount = gAppState.LayerCount;
        frameDesc.Layers = layerHeaders;

        // Hand over the eye images to the time warp.
        vrapi_SubmitFrame2(gAppState.Ovr, &frameDesc);
    }

	{
		SDL_LockMutex(gAppState.RenderThreadFrameIndex_Mutex);
		gAppState.RenderThreadFrameIndex++;
		SDL_UnlockMutex(gAppState.RenderThreadFrameIndex_Mutex);
	}
}


static void ovrAppThread_Create( ovrAppThread * appThread, JNIEnv * env, jobject activityObject, jclass activityClass )
{
	(*env)->GetJavaVM( env, &appThread->JavaVm );
	appThread->ActivityObject = (*env)->NewGlobalRef( env, activityObject );
	appThread->ActivityClass = (*env)->NewGlobalRef( env, activityClass );
	appThread->Thread = 0;
	appThread->NativeWindow = NULL;
	ovrMessageQueue_Create( &appThread->MessageQueue );

	const int createErr = pthread_create( &appThread->Thread, NULL, AppThreadFunction, appThread );
	if ( createErr != 0 )
	{
		ALOGE( "pthread_create returned %i", createErr );
	}
}

static void ovrAppThread_Destroy( ovrAppThread * appThread, JNIEnv * env )
{
	pthread_join( appThread->Thread, NULL );
	(*env)->DeleteGlobalRef( env, appThread->ActivityObject );
	(*env)->DeleteGlobalRef( env, appThread->ActivityClass );
	ovrMessageQueue_Destroy( &appThread->MessageQueue );
}

/*
================================================================================

Activity lifecycle

================================================================================
*/

jmethodID android_shutdown;
static JavaVM *jVM;
static jobject shutdownCallbackObj=0;

void jni_shutdown()
{
    ALOGV("Calling: jni_shutdown");
    JNIEnv *env;
    jobject tmp;
    if (((*jVM)->GetEnv(jVM, (void**) &env, JNI_VERSION_1_4))<0)
    {
        (*jVM)->AttachCurrentThread(jVM,&env, NULL);
    }
    return (*env)->CallVoidMethod(env, shutdownCallbackObj, android_shutdown);
}

JNIEXPORT jint JNICALL SDL_JNI_OnLoad(JavaVM* vm, void* reserved);

int JNI_OnLoad(JavaVM* vm, void* reserved)
{
	JNIEnv *env;
    jVM = vm;
	if((*vm)->GetEnv(vm, (void**) &env, JNI_VERSION_1_4) != JNI_OK)
	{
		ALOGE("Failed JNI_OnLoad");
		return -1;
	}

	return SDL_JNI_OnLoad(vm, reserved);
}

JNIEXPORT jlong JNICALL Java_com_drbeef_doom3quest_GLES3JNILib_onCreate( JNIEnv * env, jclass activityClass, jobject activity,
																	   jstring commandLineParams, jlong refresh, jfloat ss, jlong msaa)
{
	ALOGV( "    GLES3JNILib::onCreate()" );

	jboolean iscopy;
	const char *arg = (*env)->GetStringUTFChars(env, commandLineParams, &iscopy);


	char *cmdLine = NULL;
	if (arg && strlen(arg))
	{
		cmdLine = strdup(arg);
	}

	(*env)->ReleaseStringUTFChars(env, commandLineParams, arg);

	ALOGV("Command line %s", cmdLine);
	argv = malloc(sizeof(char*) * 255);
	argc = ParseCommandLine(strdup(cmdLine), argv);

	if (ss != -1.0f)
	{
		SS_MULTIPLIER = ss;
	}

	if (msaa != -1)
	{
		NUM_MULTI_SAMPLES = msaa;
	}

	if (refresh != -1)
	{
		DISPLAY_REFRESH = refresh;
	}


	ovrAppThread * appThread = (ovrAppThread *) malloc( sizeof( ovrAppThread ) );
	ovrAppThread_Create( appThread, env, activity, activityClass );

	ovrMessageQueue_Enable( &appThread->MessageQueue, true );
	ovrMessage message;
	ovrMessage_Init( &message, MESSAGE_ON_CREATE, MQ_WAIT_PROCESSED );
	ovrMessageQueue_PostMessage( &appThread->MessageQueue, &message );

	return (jlong)((size_t)appThread);
}


JNIEXPORT void JNICALL Java_com_drbeef_doom3quest_GLES3JNILib_onStart( JNIEnv * env, jobject obj, jlong handle, jobject obj1)
{
	ALOGV( "    GLES3JNILib::onStart()" );

    shutdownCallbackObj = (jobject)(*env)->NewGlobalRef(env, obj1);
    jclass callbackClass = (*env)->GetObjectClass(env, shutdownCallbackObj);

    android_shutdown = (*env)->GetMethodID(env,callbackClass,"shutdown","()V");

	ovrAppThread * appThread = (ovrAppThread *)((size_t)handle);
	ovrMessage message;
	ovrMessage_Init( &message, MESSAGE_ON_START, MQ_WAIT_PROCESSED );
	ovrMessageQueue_PostMessage( &appThread->MessageQueue, &message );
}

JNIEXPORT void JNICALL Java_com_drbeef_doom3quest_GLES3JNILib_onResume( JNIEnv * env, jobject obj, jlong handle )
{
	ALOGV( "    GLES3JNILib::onResume()" );
	ovrAppThread * appThread = (ovrAppThread *)((size_t)handle);
	ovrMessage message;
	ovrMessage_Init( &message, MESSAGE_ON_RESUME, MQ_WAIT_PROCESSED );
	ovrMessageQueue_PostMessage( &appThread->MessageQueue, &message );
}

JNIEXPORT void JNICALL Java_com_drbeef_doom3quest_GLES3JNILib_onPause( JNIEnv * env, jobject obj, jlong handle )
{
	ALOGV( "    GLES3JNILib::onPause()" );
	ovrAppThread * appThread = (ovrAppThread *)((size_t)handle);
	ovrMessage message;
	ovrMessage_Init( &message, MESSAGE_ON_PAUSE, MQ_WAIT_PROCESSED );
	ovrMessageQueue_PostMessage( &appThread->MessageQueue, &message );
}

JNIEXPORT void JNICALL Java_com_drbeef_doom3quest_GLES3JNILib_onStop( JNIEnv * env, jobject obj, jlong handle )
{
	ALOGV( "    GLES3JNILib::onStop()" );
	ovrAppThread * appThread = (ovrAppThread *)((size_t)handle);
	ovrMessage message;
	ovrMessage_Init( &message, MESSAGE_ON_STOP, MQ_WAIT_PROCESSED );
	ovrMessageQueue_PostMessage( &appThread->MessageQueue, &message );
}

JNIEXPORT void JNICALL Java_com_drbeef_doom3quest_GLES3JNILib_onDestroy( JNIEnv * env, jobject obj, jlong handle )
{
	ALOGV( "    GLES3JNILib::onDestroy()" );
	ovrAppThread * appThread = (ovrAppThread *)((size_t)handle);
	ovrMessage message;
	ovrMessage_Init( &message, MESSAGE_ON_DESTROY, MQ_WAIT_PROCESSED );
	ovrMessageQueue_PostMessage( &appThread->MessageQueue, &message );
	ovrMessageQueue_Enable( &appThread->MessageQueue, false );

	ovrAppThread_Destroy( appThread, env );
	free( appThread );
}

/*
================================================================================

Surface lifecycle

================================================================================
*/

JNIEXPORT void JNICALL Java_com_drbeef_doom3quest_GLES3JNILib_onSurfaceCreated( JNIEnv * env, jobject obj, jlong handle, jobject surface )
{
	ALOGV( "    GLES3JNILib::onSurfaceCreated()" );
	ovrAppThread * appThread = (ovrAppThread *)((size_t)handle);

	ANativeWindow * newNativeWindow = ANativeWindow_fromSurface( env, surface );
	if ( ANativeWindow_getWidth( newNativeWindow ) < ANativeWindow_getHeight( newNativeWindow ) )
	{
		// An app that is relaunched after pressing the home button gets an initial surface with
		// the wrong orientation even though android:screenOrientation="landscape" is set in the
		// manifest. The choreographer callback will also never be called for this surface because
		// the surface is immediately replaced with a new surface with the correct orientation.
		ALOGE( "        Surface not in landscape mode!" );
	}

	ALOGV( "        NativeWindow = ANativeWindow_fromSurface( env, surface )" );
	appThread->NativeWindow = newNativeWindow;
	ovrMessage message;
	ovrMessage_Init( &message, MESSAGE_ON_SURFACE_CREATED, MQ_WAIT_PROCESSED );
	ovrMessage_SetPointerParm( &message, 0, appThread->NativeWindow );
	ovrMessageQueue_PostMessage( &appThread->MessageQueue, &message );
}

JNIEXPORT void JNICALL Java_com_drbeef_doom3quest_GLES3JNILib_onSurfaceChanged( JNIEnv * env, jobject obj, jlong handle, jobject surface )
{
	ALOGV( "    GLES3JNILib::onSurfaceChanged()" );
	ovrAppThread * appThread = (ovrAppThread *)((size_t)handle);

	ANativeWindow * newNativeWindow = ANativeWindow_fromSurface( env, surface );
	if ( ANativeWindow_getWidth( newNativeWindow ) < ANativeWindow_getHeight( newNativeWindow ) )
	{
		// An app that is relaunched after pressing the home button gets an initial surface with
		// the wrong orientation even though android:screenOrientation="landscape" is set in the
		// manifest. The choreographer callback will also never be called for this surface because
		// the surface is immediately replaced with a new surface with the correct orientation.
		ALOGE( "        Surface not in landscape mode!" );
	}

	if ( newNativeWindow != appThread->NativeWindow )
	{
		if ( appThread->NativeWindow != NULL )
		{
			ovrMessage message;
			ovrMessage_Init( &message, MESSAGE_ON_SURFACE_DESTROYED, MQ_WAIT_PROCESSED );
			ovrMessageQueue_PostMessage( &appThread->MessageQueue, &message );
			ALOGV( "        ANativeWindow_release( NativeWindow )" );
			ANativeWindow_release( appThread->NativeWindow );
			appThread->NativeWindow = NULL;
		}
		if ( newNativeWindow != NULL )
		{
			ALOGV( "        NativeWindow = ANativeWindow_fromSurface( env, surface )" );
			appThread->NativeWindow = newNativeWindow;
			ovrMessage message;
			ovrMessage_Init( &message, MESSAGE_ON_SURFACE_CREATED, MQ_WAIT_PROCESSED );
			ovrMessage_SetPointerParm( &message, 0, appThread->NativeWindow );
			ovrMessageQueue_PostMessage( &appThread->MessageQueue, &message );
		}
	}
	else if ( newNativeWindow != NULL )
	{
		ANativeWindow_release( newNativeWindow );
	}
}

JNIEXPORT void JNICALL Java_com_drbeef_doom3quest_GLES3JNILib_onSurfaceDestroyed( JNIEnv * env, jobject obj, jlong handle )
{
	ALOGV( "    GLES3JNILib::onSurfaceDestroyed()" );
	ovrAppThread * appThread = (ovrAppThread *)((size_t)handle);
	ovrMessage message;
	ovrMessage_Init( &message, MESSAGE_ON_SURFACE_DESTROYED, MQ_WAIT_PROCESSED );
	ovrMessageQueue_PostMessage( &appThread->MessageQueue, &message );
	ALOGV( "        ANativeWindow_release( NativeWindow )" );
	ANativeWindow_release( appThread->NativeWindow );
	appThread->NativeWindow = NULL;
}