main.mm

#include <errno.h>
#include <substrate.h>
#include <rfb/rfb.h>

#define kSettingsPath @"//var/mobile/Library/Preferences/com.torrekie.screendump.plist"

static bool CCSisEnabled = true;
static NSString *CCSPassword = nil;
static rfbScreenInfoPtr screen;
static bool isVNCRunning;
// static NSCondition *condition_;
static NSLock *lock;
static size_t width;
static size_t height;
static size_t byte_per_pixel;
static size_t bytesPerRow;
static size_t pixelF;
static size_t bits_per_sample = 8;

static size_t size_image;

static size_t prefferH;
static size_t prefferW;

static CFTypeRef (*$GSSystemCopyCapability)(CFStringRef);
static CFTypeRef (*$GSSystemGetCapability)(CFStringRef);
static BOOL (*$MGGetBoolAnswer)(CFStringRef);

typedef void *IOMobileFramebufferRef;
typedef void *IOSurfaceAcceleratorRef;
typedef struct __IOMobileFramebuffer *IOMobileFramebufferConnection;

extern CFStringRef kIOSurfaceMemoryRegion;
extern const CFStringRef kIOSurfaceIsGlobal;

extern "C" void IOMobileFramebufferGetDisplaySize(IOMobileFramebufferRef connect, CGSize *size);
extern "C" int IOSurfaceAcceleratorCreate(CFAllocatorRef allocator, int type, IOSurfaceAcceleratorRef *accel);
extern "C" unsigned int IOSurfaceAcceleratorTransferSurface(IOSurfaceAcceleratorRef accelerator, IOSurfaceRef dest, IOSurfaceRef src, void *, void *, void *, void *);

extern "C" kern_return_t IOMobileFramebufferSwapSetLayer(
    IOMobileFramebufferRef fb,
    int layer,
    IOSurfaceRef buffer,
    CGRect bounds,
    CGRect frame,
    int flags
);
typedef mach_port_t io_service_t;
typedef kern_return_t IOReturn;
typedef IOReturn IOMobileFramebufferReturn;
typedef io_service_t IOMobileFramebufferService;
extern "C" void IOSurfaceFlushProcessorCaches(IOSurfaceRef buffer);
extern "C" int IOSurfaceLock(IOSurfaceRef surface, uint32_t options, uint32_t *seed);
extern "C" int IOSurfaceUnlock(IOSurfaceRef surface, uint32_t options, uint32_t *seed);
extern "C" Boolean IOSurfaceIsInUse(IOSurfaceRef buffer);
extern "C" CFMutableDictionaryRef IOServiceMatching(const char *name);
extern "C" const mach_port_t kIOMasterPortDefault;
extern "C" io_service_t IOServiceGetMatchingService(mach_port_t masterPort, CFDictionaryRef matching);
extern "C" IOMobileFramebufferReturn IOMobileFramebufferGetLayerDefaultSurface(IOMobileFramebufferRef pointer, int surface, IOSurfaceRef *buffer);
extern "C" IOMobileFramebufferReturn IOMobileFramebufferOpen(IOMobileFramebufferService service, mach_port_t owningTask, unsigned int type, IOMobileFramebufferRef *pointer);
extern "C" IOMobileFramebufferReturn IOMobileFramebufferGetMainDisplay(IOMobileFramebufferRef *pointer);
static IOSurfaceAcceleratorRef accelerator;
static IOSurfaceRef static_buffer;

static void VNCSettings(bool shouldStart, NSString *password);
static void VNCUpdateRunState(bool shouldStart);
static void handleVNCKeyboard(rfbBool down, rfbKeySym key, rfbClientPtr client);
static void handleVNCPointer(int buttons, int x, int y, rfbClientPtr client);

static BOOL isLoopFrame;

static rfbBool VNCCheck(rfbClientPtr client, const char *data, int size)
{
    NSString *password = reinterpret_cast<NSString *>(screen->authPasswdData);
    if(!password) {
        return TRUE;
    }
    if ([password length] == 0) {
        return TRUE;
    }
    NSAutoreleasePool *pool([[NSAutoreleasePool alloc] init]);
    rfbEncryptBytes(client->authChallenge, const_cast<char *>([password UTF8String]));
    bool good(memcmp(client->authChallenge, data, size) == 0);
    [pool release];
    return good;
}

static IOSurfaceRef screenSurface = NULL;
static IOMobileFramebufferRef framebufferConnection = NULL;

@interface FrameUpdater : NSObject
@property (nonatomic, retain) NSTimer* myTimer;
- (void)startFrameLoop;
- (void)stopFrameLoop;
@end

static void VNCSetup()
{
	if(!screenSurface) {
		IOSurfaceAcceleratorCreate(kCFAllocatorDefault, 0, &accelerator);
		
		IOMobileFramebufferGetMainDisplay(&framebufferConnection);
		IOMobileFramebufferGetLayerDefaultSurface(framebufferConnection, 0, &screenSurface);
		
		//CGSize size;
		//IOMobileFramebufferGetDisplaySize(framebufferConnection, &size);
		//width = size.width/2;
		//height = size.height/2;
		
		width = prefferW==0?IOSurfaceGetWidth(screenSurface):prefferW;
		height = prefferW==0?IOSurfaceGetHeight(screenSurface):prefferH;
		
		size_image = IOSurfaceGetAllocSize(screenSurface);
		bytesPerRow = IOSurfaceGetBytesPerRow(screenSurface);
		pixelF = IOSurfaceGetPixelFormat(screenSurface);
		
		byte_per_pixel = 4;//IOSurfaceGetBytesPerElement(screenSurface);
		bits_per_sample = 8;
		
		
		
		static_buffer = IOSurfaceCreate((CFDictionaryRef) [NSDictionary dictionaryWithObjectsAndKeys:
            @"PurpleEDRAM", kIOSurfaceMemoryRegion,
            //[NSNumber numberWithBool:YES], kIOSurfaceIsGlobal,
            [NSNumber numberWithInt:byte_per_pixel*width], kIOSurfaceBytesPerRow,
			[NSNumber numberWithInt:byte_per_pixel], kIOSurfaceBytesPerElement,
            [NSNumber numberWithInt:width], kIOSurfaceWidth,
            [NSNumber numberWithInt:height], kIOSurfaceHeight,
            [NSNumber numberWithInt:'BGRA'], kIOSurfacePixelFormat,
            [NSNumber numberWithInt:(width*height*byte_per_pixel)], kIOSurfaceAllocSize,
        nil]);
	}
	
    int argc(1);
    char *arg0(strdup("ScreenDumpVNC"));
    char *argv[] = {arg0, NULL};
    screen = rfbGetScreen(&argc, argv, width, height, bits_per_sample, 3, byte_per_pixel);
	screen->frameBuffer = reinterpret_cast<char *>(IOSurfaceGetBaseAddress((IOSurfaceRef)CFRetain(static_buffer)));
    screen->serverFormat.redShift = bits_per_sample * 2;
    screen->serverFormat.greenShift = bits_per_sample * 1;
    screen->serverFormat.blueShift = bits_per_sample * 0;
    screen->kbdAddEvent = &handleVNCKeyboard;
    screen->ptrAddEvent = &handleVNCPointer;
    screen->passwordCheck = &VNCCheck;
    free(arg0);
    VNCUpdateRunState(CCSisEnabled);
}

static void VNCSettings(bool shouldStart, NSString* password)
{
    CCSisEnabled = shouldStart;
    if(password) {
        CCSPassword = password;
    }
    NSString *sEnabled = CCSisEnabled ? @"YES": @"NO";
    VNCUpdateRunState(CCSisEnabled);
}



static void VNCUpdateRunState(bool shouldStart)
{
    if(screen == NULL) {
        return;
    }
	
	
    if(CCSPassword && CCSPassword.length) {
        screen->authPasswdData = (void *) CCSPassword;
    } else {
        screen->authPasswdData = NULL;
    }
    if(shouldStart == isVNCRunning) {
        return;
    }
    if(shouldStart) {
        rfbInitServer(screen);
        rfbRunEventLoop(screen, -1, true);
		
		isLoopFrame = YES;
		
		[[FrameUpdater shared] startFrameLoop];
		
    } else {
		isLoopFrame = NO;
		
		[[FrameUpdater shared] stopFrameLoop];
		
        rfbShutdownServer(screen, true);
    }
    isVNCRunning = shouldStart;
}

static void loadPrefs(void)
{
	@autoreleasepool {
		NSDictionary* defaults = nil;
		CFStringRef appID = CFSTR("com.torrekie.screendump");
		CFArrayRef keyList = CFPreferencesCopyKeyList(appID, CFSTR("mobile"), kCFPreferencesAnyHost);
		if(keyList) {
			defaults = (NSDictionary *)CFPreferencesCopyMultiple(keyList, appID, CFSTR("mobile"), kCFPreferencesAnyHost)?:@{};
			CFRelease(keyList);
		}
		
		prefferH = [[defaults objectForKey:@"height"]?:@(0) intValue];
		prefferW = [[defaults objectForKey:@"width"]?:@(0) intValue];
		
		BOOL isEnabled = [[defaults objectForKey:@"CCSisEnabled"]?:@NO boolValue];
		NSString *password = [defaults objectForKey:@"CCSPassword"];
		VNCSettings(isEnabled, password);
	}
}


static uint32_t oldSeed;

@implementation FrameUpdater
{
	NSOperationQueue *q;
}
@synthesize myTimer;
+ (id)shared
{
	static __strong FrameUpdater* initFrame;
	if(!initFrame) {
		initFrame = [[[self class] alloc] init];
	}
	return initFrame;
}
- (id)init
{
	self = [super init];
	
	q = [[NSOperationQueue alloc] init];
	
	return self;
}
- (void)_upFrameLoop
{
	if(isLoopFrame && CCSisEnabled) {
		//check if screen changed
		uint32_t newSeed = IOSurfaceGetSeed(screenSurface);
		
		if(oldSeed != newSeed && rfbIsActive(screen)) {
			oldSeed = newSeed;
			[q addOperationWithBlock: ^{
				IOSurfaceAcceleratorTransferSurface(accelerator, screenSurface, static_buffer, NULL, NULL, NULL, NULL);
				rfbMarkRectAsModified(screen, 0, 0, width, height);
			}];
		}
	} else {
		[self stopFrameLoop];
	}
}
- (void)stopFrameLoop
{
	if(myTimer && [myTimer isValid]) {
		dispatch_async(dispatch_get_main_queue(), ^(void){
			[myTimer invalidate];
		});
	}
}
- (void)startFrameLoop
{
	if(size_image == 0) {
		VNCSetup();
	}
	[self stopFrameLoop];
	dispatch_async(dispatch_get_main_queue(), ^(void){
		myTimer = [NSTimer scheduledTimerWithTimeInterval:1/400 target:self selector:@selector(_upFrameLoop) userInfo:nil repeats:YES];
	});
}
-(void)dealloc
{
    [self stopFrameLoop];
}
@end

static void restartServer()
{
	exit(0);
}

int main(int argc, const char *argv[])
{
    CFNotificationCenterAddObserver(CFNotificationCenterGetDarwinNotifyCenter(), NULL, (CFNotificationCallback)loadPrefs, CFSTR("com.torrekie.screendump/preferences.changed"), NULL, CFNotificationSuspensionBehaviorDeliverImmediately);
	CFNotificationCenterAddObserver(CFNotificationCenterGetDarwinNotifyCenter(), NULL, (CFNotificationCallback)restartServer, CFSTR("com.torrekie.screendump/restart"), NULL, CFNotificationSuspensionBehaviorDeliverImmediately);
	
    loadPrefs();
	
	VNCSetup();
	//VNCBlack();
	
	
	
	[[NSRunLoop currentRunLoop] run];
	
    return EXIT_SUCCESS;
}


#include <mach/mach.h>
#include <mach/mach_time.h>
#include <rfb/rfb.h>
#include <rfb/keysym.h>
#include "./include/IOKit/hid/IOHIDEventTypes.h"
#include "./include/IOKit/hidsystem/IOHIDUsageTables.h"

typedef uint32_t IOHIDDigitizerTransducerType;

#ifdef __LP64__
typedef double IOHIDFloat;
#else
typedef float IOHIDFloat;
#endif

typedef UInt32	IOOptionBits;
typedef uint32_t IOHIDEventField;

extern "C" {
    typedef uint32_t IOHIDEventOptionBits;
    typedef struct __IOHIDEvent *IOHIDEventRef;
    typedef struct CF_BRIDGED_TYPE(id) __IOHIDEventSystemClient * IOHIDEventSystemClientRef;
    IOHIDEventRef IOHIDEventCreateKeyboardEvent(
        CFAllocatorRef allocator,
        uint64_t time, uint16_t page, uint16_t usage,
        Boolean down, IOHIDEventOptionBits flags
    );

    IOHIDEventRef IOHIDEventCreateDigitizerEvent(CFAllocatorRef allocator, uint64_t timeStamp, IOHIDDigitizerTransducerType type, uint32_t index, uint32_t identity, uint32_t eventMask, uint32_t buttonMask, IOHIDFloat x, IOHIDFloat y, IOHIDFloat z, IOHIDFloat tipPressure, IOHIDFloat barrelPressure, Boolean range, Boolean touch, IOOptionBits options);
    IOHIDEventRef IOHIDEventCreateDigitizerFingerEvent(CFAllocatorRef allocator, uint64_t timeStamp, uint32_t index, uint32_t identity, uint32_t eventMask, IOHIDFloat x, IOHIDFloat y, IOHIDFloat z, IOHIDFloat tipPressure, IOHIDFloat twist, Boolean range, Boolean touch, IOOptionBits options);

    IOHIDEventSystemClientRef IOHIDEventSystemClientCreate(CFAllocatorRef allocator);

    void IOHIDEventAppendEvent(IOHIDEventRef parent, IOHIDEventRef child);
    void IOHIDEventSetIntegerValue(IOHIDEventRef event, IOHIDEventField field, int value);
    void IOHIDEventSetSenderID(IOHIDEventRef event, uint64_t sender);

    void IOHIDEventSystemClientDispatchEvent(IOHIDEventSystemClientRef client, IOHIDEventRef event);
    // void IOHIDEventSystemConnectionDispatchEvent(IOHIDEventSystemConnectionRef connection, IOHIDEventRef event);
}

static void VNCPointerNew(int buttons, int x, int y, CGPoint location, int diff, bool twas, bool tis);

static void SendHIDEvent(IOHIDEventRef event)
{
    static IOHIDEventSystemClientRef client_(NULL);
    if (client_ == NULL) {
        client_ = IOHIDEventSystemClientCreate(kCFAllocatorDefault);
	}
    IOHIDEventSetSenderID(event, 0x8000000817319372);
    IOHIDEventSystemClientDispatchEvent(client_, event);
    CFRelease(event);
}

static void VNCKeyboard(rfbBool down, rfbKeySym key, rfbClientPtr client)
{	
    uint16_t usage;

    switch (key) {
	/* TTY Functions */
	case XK_BackSpace:
	case XK_Delete: usage = kHIDUsage_KeyboardDeleteOrBackspace; break;
	case XK_Tab: usage = kHIDUsage_KeyboardTab; break;
	case XK_Linefeed: usage = kHIDUsage_KeyboardReturnOrEnter; break;
	case XK_Clear: usage = kHIDUsage_KeyboardClear; break;
	case XK_Return: usage = kHIDUsage_KeyboardReturnOrEnter; break;
	case XK_Pause: usage = kHIDUsage_KeyboardPause; break;
	case XK_Scroll_Lock: usage = kHIDUsage_KeyboardScrollLock; break;
	case XK_Sys_Req: usage = kHIDUsage_KeyboardSysReqOrAttention; break;
	case XK_Escape: usage = kHIDUsage_KeyboardEscape; break;

	/* Cursor control & motion */
	case XK_Home: case XK_Begin: usage = kHIDUsage_KeyboardHome; break;
	case XK_Left: usage = kHIDUsage_KeyboardLeftArrow; break;
	case XK_Up: usage = kHIDUsage_KeyboardUpArrow; break;
	case XK_Right: usage = kHIDUsage_KeyboardRightArrow; break;
	case XK_Down: usage = kHIDUsage_KeyboardDownArrow; break;
//	case XK_Prior: usage = kHIDUsage_KeyboardPrior; break;
	case XK_Page_Up: usage = kHIDUsage_KeyboardPageUp; break;
//	case XK_Next:
	case XK_Page_Down: usage = kHIDUsage_KeyboardPageDown; break;
	case XK_End: usage = kHIDUsage_KeyboardEnd; break;

	/* Misc Functions */
	case XK_Select: usage = kHIDUsage_KeyboardSelect; break;
	case XK_Print: usage = kHIDUsage_KeyboardPrintScreen; break;
	case XK_Execute: usage = kHIDUsage_KeyboardExecute; break;
	case XK_Insert: usage = kHIDUsage_KeyboardInsert; break;
	case XK_Undo: usage = kHIDUsage_KeyboardUndo; break;
	case XK_Redo: usage = kHIDUsage_KeyboardAgain; break;
	case XK_Menu: usage = kHIDUsage_KeyboardMenu; break;
	case XK_Find: usage = kHIDUsage_KeyboardFind; break;
	case XK_Cancel: usage = kHIDUsage_KeyboardCancel; break;
	case XK_Help: usage = kHIDUsage_KeyboardHelp; break;
	case XK_Break: usage = kHIDUsage_KeyboardF15; break;
//	case XK_Mode_switch:
	case XK_script_switch: usage = kHIDUsage_KeyboardF19; break;
	case XK_Num_Lock: usage = kHIDUsage_KeyboardLockingNumLock; break;

	/* Keypad Functions, keypad numbers cleverly chosen to map to ascii */
	case XK_KP_Enter: usage = kHIDUsage_KeypadEnter; break;
	case XK_KP_Equal: usage = kHIDUsage_KeypadEqualSign; break;
	case XK_KP_Multiply: usage = kHIDUsage_KeypadAsterisk; break;
	case XK_KP_Add: usage = kHIDUsage_KeypadPlus; break;
	case XK_KP_Separator: usage = kHIDUsage_KeypadComma; break;
	case XK_KP_Subtract: usage = kHIDUsage_KeypadHyphen; break;
	case XK_KP_Decimal: usage = kHIDUsage_KeypadPeriod; break;
	case XK_KP_Divide: usage = kHIDUsage_KeypadSlash; break;

	case XK_KP_0: usage = kHIDUsage_Keypad0;
	case XK_KP_1: usage = kHIDUsage_Keypad1;
	case XK_KP_2: usage = kHIDUsage_Keypad2;
	case XK_KP_3: usage = kHIDUsage_Keypad3;
	case XK_KP_4: usage = kHIDUsage_Keypad4;
	case XK_KP_5: usage = kHIDUsage_Keypad5;
	case XK_KP_6: usage = kHIDUsage_Keypad6;
	case XK_KP_7: usage = kHIDUsage_Keypad7;
	case XK_KP_8: usage = kHIDUsage_Keypad8;
	case XK_KP_9: usage = kHIDUsage_Keypad9;

	/* Auxiliary Functions */
	case XK_F1: usage = kHIDUsage_KeyboardF1; break;
	case XK_F2: usage = kHIDUsage_KeyboardF2; break;
	case XK_F3: usage = kHIDUsage_KeyboardF3; break;
	case XK_F4: usage = kHIDUsage_KeyboardF4; break;
	case XK_F5: usage = kHIDUsage_KeyboardF5; break;
	case XK_F6: usage = kHIDUsage_KeyboardF6; break;
	case XK_F7: usage = kHIDUsage_KeyboardF7; break;
	case XK_F8: usage = kHIDUsage_KeyboardF8; break;
	case XK_F9: usage = kHIDUsage_KeyboardF9; break;
	case XK_F10: usage = kHIDUsage_KeyboardF10; break;
	case XK_F11: usage = kHIDUsage_KeyboardF11; break;
	case XK_F12: usage = kHIDUsage_KeyboardF12; break;
	case XK_F13: usage = kHIDUsage_KeyboardF13; break;
	case XK_F14: usage = kHIDUsage_KeyboardF14; break;
	case XK_F15: usage = kHIDUsage_KeyboardF15; break;
	case XK_F16: usage = kHIDUsage_KeyboardF16; break;
	case XK_F17: usage = kHIDUsage_KeyboardF17; break;
	case XK_F18: usage = kHIDUsage_KeyboardF18; break;
	case XK_F19: usage = kHIDUsage_KeyboardF19; break;
	case XK_F20: usage = kHIDUsage_KeyboardF20; break;
	case XK_F21: usage = kHIDUsage_KeyboardF21; break;
	case XK_F22: usage = kHIDUsage_KeyboardF22; break;
	case XK_F23: usage = kHIDUsage_KeyboardF23; break;
	case XK_F24: usage = kHIDUsage_KeyboardF24; break;

	/* Modifiers */
	case XK_Shift_L: usage = kHIDUsage_KeyboardLeftShift; break;
	case XK_Shift_R: usage = kHIDUsage_KeyboardRightShift; break;
	case XK_Control_L: usage = kHIDUsage_KeyboardLeftControl; break;
	case XK_Control_R: usage = kHIDUsage_KeyboardRightControl; break;
	case XK_Caps_Lock:
	case XK_Shift_Lock: usage = kHIDUsage_KeyboardLockingCapsLock; break;

	case XK_Meta_L: usage = kHIDUsage_KeyboardLeftAlt; break;
	case XK_Meta_R: usage = kHIDUsage_KeyboardRightAlt; break;
	case XK_Alt_L: usage = kHIDUsage_KeyboardLeftGUI; break;
	case XK_Alt_R: usage = kHIDUsage_KeyboardRightGUI; break;

	/* Latin */
	case XK_space: usage = kHIDUsage_KeyboardSpacebar; break;
        case XK_exclam: case XK_1: usage = kHIDUsage_Keyboard1; break;
        case XK_at: case XK_2: usage = kHIDUsage_Keyboard2; break;
        case XK_numbersign: case XK_3: usage = kHIDUsage_Keyboard3; break;
        case XK_dollar: case XK_4: usage = kHIDUsage_Keyboard4; break;
        case XK_percent: case XK_5: usage = kHIDUsage_Keyboard5; break;
        case XK_asciicircum: case XK_6: usage = kHIDUsage_Keyboard6; break;
        case XK_ampersand: case XK_7: usage = kHIDUsage_Keyboard7; break;
        case XK_asterisk: case XK_8: usage = kHIDUsage_Keyboard8; break;
        case XK_parenleft: case XK_9: usage = kHIDUsage_Keyboard9; break;
        case XK_parenright: case XK_0: usage = kHIDUsage_Keyboard0; break;

	case XK_underscore: case XK_minus: usage = kHIDUsage_KeyboardHyphen; break;
	case XK_plus: case XK_equal: usage = kHIDUsage_KeyboardEqualSign; break;
	case XK_greater: case XK_period: usage = kHIDUsage_KeyboardPeriod; break;
	case XK_question: case XK_slash: usage = kHIDUsage_KeyboardSlash; break;
	case XK_colon: case XK_semicolon: usage = kHIDUsage_KeyboardSemicolon; break;
	case XK_less: case XK_comma: usage = kHIDUsage_KeyboardComma; break;

        case XK_A: case XK_a: usage = kHIDUsage_KeyboardA; break;
        case XK_B: case XK_b: usage = kHIDUsage_KeyboardB; break;
        case XK_C: case XK_c: usage = kHIDUsage_KeyboardC; break;
        case XK_D: case XK_d: usage = kHIDUsage_KeyboardD; break;
        case XK_E: case XK_e: usage = kHIDUsage_KeyboardE; break;
        case XK_F: case XK_f: usage = kHIDUsage_KeyboardF; break;
        case XK_G: case XK_g: usage = kHIDUsage_KeyboardG; break;
        case XK_H: case XK_h: usage = kHIDUsage_KeyboardH; break;
        case XK_I: case XK_i: usage = kHIDUsage_KeyboardI; break;
        case XK_J: case XK_j: usage = kHIDUsage_KeyboardJ; break;
        case XK_K: case XK_k: usage = kHIDUsage_KeyboardK; break;
        case XK_L: case XK_l: usage = kHIDUsage_KeyboardL; break;
        case XK_M: case XK_m: usage = kHIDUsage_KeyboardM; break;
        case XK_N: case XK_n: usage = kHIDUsage_KeyboardN; break;
        case XK_O: case XK_o: usage = kHIDUsage_KeyboardO; break;
        case XK_P: case XK_p: usage = kHIDUsage_KeyboardP; break;
        case XK_Q: case XK_q: usage = kHIDUsage_KeyboardQ; break;
        case XK_R: case XK_r: usage = kHIDUsage_KeyboardR; break;
        case XK_S: case XK_s: usage = kHIDUsage_KeyboardS; break;
        case XK_T: case XK_t: usage = kHIDUsage_KeyboardT; break;
        case XK_U: case XK_u: usage = kHIDUsage_KeyboardU; break;
        case XK_V: case XK_v: usage = kHIDUsage_KeyboardV; break;
        case XK_W: case XK_w: usage = kHIDUsage_KeyboardW; break;
        case XK_X: case XK_x: usage = kHIDUsage_KeyboardX; break;
        case XK_Y: case XK_y: usage = kHIDUsage_KeyboardY; break;
        case XK_Z: case XK_z: usage = kHIDUsage_KeyboardZ; break;

        case XK_braceleft: case XK_bracketleft: usage = kHIDUsage_KeyboardOpenBracket; break;
        case XK_braceright: case XK_bracketright: usage = kHIDUsage_KeyboardCloseBracket; break;
        case XK_bar: case XK_backslash: usage = kHIDUsage_KeyboardBackslash; break;
        case XK_quotedbl: case XK_apostrophe: usage = kHIDUsage_KeyboardQuote; break;
        case XK_asciitilde: case XK_grave: usage = kHIDUsage_KeyboardGraveAccentAndTilde; break;

        default: return;
    }

    SendHIDEvent(IOHIDEventCreateKeyboardEvent(kCFAllocatorDefault, mach_absolute_time(), kHIDPage_KeyboardOrKeypad, usage, down, 0));
}

static int buttons_;
static int x_, y_;

static void VNCPointer(int buttons, int x, int y, rfbClientPtr client) {
    // if (ratio_ == 0)
    //     return;

    CGPoint location = {static_cast<CGFloat>(x), static_cast<CGFloat>(y)};

    // if (width_ > height_) {
    //     int t(x);
    //     x = height_ - 1 - y;
    //     y = t;

    //     if (!iPad1_) {
    //         x = height_ - 1 - x;
    //         y = width_ - 1 - y;
    //     }
    // }

    // x /= ratio_;
    // y /= ratio_;

    // x_ = x; y_ = y;
    int diff = buttons_ ^ buttons;
    bool twas((buttons_ & 0x1) != 0);
    bool tis((buttons & 0x1) != 0);
    buttons_ = buttons;

    rfbDefaultPtrAddEvent(buttons, x, y, client);

    // if (Ashikase(false)) {
    //     AshikaseSendEvent(x, y, buttons);
    //     return;
    // }

    return VNCPointerNew(buttons, x, y, location, diff, twas, tis);
}

static void VNCPointerNew(int buttons, int x, int y, CGPoint location, int diff, bool twas, bool tis) {
    if ((diff & 0x10) != 0)
        SendHIDEvent(IOHIDEventCreateKeyboardEvent(kCFAllocatorDefault, mach_absolute_time(), kHIDPage_Telephony, kHIDUsage_Tfon_Flash, (buttons & 0x10) != 0, 0));
    if ((diff & 0x04) != 0)
        SendHIDEvent(IOHIDEventCreateKeyboardEvent(kCFAllocatorDefault, mach_absolute_time(), kHIDPage_Consumer, kHIDUsage_Csmr_Menu, (buttons & 0x04) != 0, 0));
    if ((diff & 0x02) != 0)
        SendHIDEvent(IOHIDEventCreateKeyboardEvent(kCFAllocatorDefault, mach_absolute_time(), kHIDPage_Consumer, kHIDUsage_Csmr_Power, (buttons & 0x02) != 0, 0));

    uint32_t handm;
    uint32_t fingerm;

    if (twas == 0 && tis == 1) {
        handm = kIOHIDDigitizerEventRange | kIOHIDDigitizerEventTouch | kIOHIDDigitizerEventIdentity;
        fingerm = kIOHIDDigitizerEventRange | kIOHIDDigitizerEventTouch;
    } else if (twas == 1 && tis == 1) {
        handm = kIOHIDDigitizerEventPosition;
        fingerm = kIOHIDDigitizerEventPosition;
    } else if (twas == 1 && tis == 0) {
        handm = kIOHIDDigitizerEventRange | kIOHIDDigitizerEventTouch | kIOHIDDigitizerEventIdentity | kIOHIDDigitizerEventPosition;
        fingerm = kIOHIDDigitizerEventRange | kIOHIDDigitizerEventTouch;
    } else return;

    // XXX: avoid division in VNCPointer()
    // x *= ratio_;
    // y *= ratio_;

    IOHIDFloat xf(x);
    IOHIDFloat yf(y);

    xf /= width;
    yf /= height;

    IOHIDEventRef hand(IOHIDEventCreateDigitizerEvent(kCFAllocatorDefault, mach_absolute_time(), kIOHIDDigitizerTransducerTypeHand, 1<<22, 1, handm, 0, xf, yf, 0, 0, 0, 0, 0, 0));
    IOHIDEventSetIntegerValue(hand, kIOHIDEventFieldIsBuiltIn, true);
    IOHIDEventSetIntegerValue(hand, kIOHIDEventFieldDigitizerIsDisplayIntegrated, true);

    IOHIDEventRef finger(IOHIDEventCreateDigitizerFingerEvent(kCFAllocatorDefault, mach_absolute_time(), 3, 2, fingerm, xf, yf, 0, 0, 0, tis, tis, 0));
    IOHIDEventAppendEvent(hand, finger);
    CFRelease(finger);

    SendHIDEvent(hand);
}

static void handleVNCKeyboard(rfbBool down, rfbKeySym key, rfbClientPtr client) {
    VNCKeyboard(down, key, client);
}

static void handleVNCPointer(int buttons, int x, int y, rfbClientPtr client) {
    VNCPointer(buttons, x, y, client);
}