ppsspp/ios/ViewController.mm

//
// ViewController.m
//
// Created by rock88
// Modified by xSacha
//

#import "AppDelegate.h"
#import "ViewController.h"
#import "DisplayManager.h"
#include "Controls.h"
#import "iOSCoreAudio.h"

#import <GLKit/GLKit.h>
#include <cassert>

#include "Common/Net/Resolve.h"
#include "Common/UI/Screen.h"
#include "Common/GPU/thin3d.h"
#include "Common/GPU/thin3d_create.h"
#include "Common/GPU/OpenGL/GLRenderManager.h"
#include "Common/GPU/OpenGL/GLFeatures.h"
#include "Common/Data/Encoding/Utf8.h"
#include "Common/System/Display.h"
#include "Common/System/System.h"
#include "Common/System/OSD.h"
#include "Common/System/NativeApp.h"
#include "Common/File/VFS/VFS.h"
#include "Common/Log.h"
#include "Common/TimeUtil.h"
#include "Common/Input/InputState.h"
#include "Common/Input/KeyCodes.h"
#include "Common/GraphicsContext.h"

#include "Core/Config.h"
#include "Core/ConfigValues.h"
#include "Core/KeyMap.h"
#include "Core/System.h"
#include "Core/HLE/sceUsbCam.h"
#include "Core/HLE/sceUsbGps.h"

#include <sys/types.h>
#include <sys/sysctl.h>
#include <mach/machine.h>

#define IS_IPAD() ([UIDevice currentDevice].userInterfaceIdiom == UIUserInterfaceIdiomPad)
#define IS_IPHONE() ([UIDevice currentDevice].userInterfaceIdiom == UIUserInterfaceIdiomPhone)

class IOSGLESContext : public GraphicsContext {
public:
	IOSGLESContext() {
		CheckGLExtensions();
		draw_ = Draw::T3DCreateGLContext(false);
		renderManager_ = (GLRenderManager *)draw_->GetNativeObject(Draw::NativeObject::RENDER_MANAGER);
		renderManager_->SetInflightFrames(g_Config.iInflightFrames);
		SetGPUBackend(GPUBackend::OPENGL);
		bool success = draw_->CreatePresets();
		_assert_msg_(success, "Failed to compile preset shaders");
	}
	~IOSGLESContext() {
		delete draw_;
	}
	Draw::DrawContext *GetDrawContext() override {
		return draw_;
	}

	void Resize() override {}
	void Shutdown() override {}

	void ThreadStart() override {
		renderManager_->ThreadStart(draw_);
	}

	bool ThreadFrame() override {
		return renderManager_->ThreadFrame();
	}

	void ThreadEnd() override {
		renderManager_->ThreadEnd();
	}

	void StopThread() override {
		renderManager_->StopThread();
	}

private:
	Draw::DrawContext *draw_;
	GLRenderManager *renderManager_;
};

static bool threadEnabled = true;
static bool threadStopped = false;

id<PPSSPPViewController> sharedViewController;

// TODO: Reach these through sharedViewController
static CameraHelper *cameraHelper;

@interface PPSSPPViewControllerGL () {
	ICadeTracker g_iCadeTracker;
	TouchTracker g_touchTracker;

	GraphicsContext *graphicsContext;
	LocationHelper *locationHelper;
}

@property (nonatomic, strong) EAGLContext* context;

//@property (nonatomic) iCadeReaderView* iCadeView;
@property (nonatomic) GCController *gameController __attribute__((weak_import));

@end

@implementation PPSSPPViewControllerGL

-(id) init {
	self = [super init];
	if (self) {
		sharedViewController = self;
		g_iCadeTracker.InitKeyMap();

		[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(appWillTerminate:) name:UIApplicationWillTerminateNotification object:nil];

		if ([GCController class]) // Checking the availability of a GameController framework
		{
			[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(controllerDidConnect:) name:GCControllerDidConnectNotification object:nil];
			[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(controllerDidDisconnect:) name:GCControllerDidDisconnectNotification object:nil];
		}
	}
	return self;
}

- (BOOL)prefersHomeIndicatorAutoHidden {
    return YES;
}

- (void)shareText:(NSString *)text {
	NSArray *items = @[text];
	UIActivityViewController * viewController = [[UIActivityViewController alloc] initWithActivityItems:items applicationActivities:nil];
	dispatch_async(dispatch_get_main_queue(), ^{
		[self presentViewController:viewController animated:YES completion:nil];
	});
}

extern float g_safeInsetLeft;
extern float g_safeInsetRight;
extern float g_safeInsetTop;
extern float g_safeInsetBottom;

- (void)viewSafeAreaInsetsDidChange {
	if (@available(iOS 11.0, *)) {
		[super viewSafeAreaInsetsDidChange];
		// we use 0.0f instead of safeAreaInsets.bottom because the bottom overlay isn't disturbing (for now)
		g_safeInsetLeft = self.view.safeAreaInsets.left;
		g_safeInsetRight = self.view.safeAreaInsets.right;
		g_safeInsetTop = self.view.safeAreaInsets.top;
		g_safeInsetBottom = 0.0f;
	}
}

- (void)viewDidAppear:(BOOL)animated {
	[super viewDidAppear:animated];
	[self hideKeyboard];
}

- (void)viewDidLoad {
	[super viewDidLoad];
	[[DisplayManager shared] setupDisplayListener];

	UIScreen* screen = [(AppDelegate*)[UIApplication sharedApplication].delegate screen];
	self.view.frame = [screen bounds];
	self.view.multipleTouchEnabled = YES;
	self.context = [[EAGLContext alloc] initWithAPI:kEAGLRenderingAPIOpenGLES3];

	if (!self.context) {
		self.context = [[EAGLContext alloc] initWithAPI:kEAGLRenderingAPIOpenGLES2];
	}

	UIScreenEdgePanGestureRecognizer *mBackGestureRecognizer = [[UIScreenEdgePanGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipeFrom:) ];
	[mBackGestureRecognizer setEdges:UIRectEdgeLeft];
	[[self view] addGestureRecognizer:mBackGestureRecognizer];

	GLKView* view = (GLKView *)self.view;
	view.context = self.context;
	view.drawableDepthFormat = GLKViewDrawableDepthFormat24;
	view.drawableStencilFormat = GLKViewDrawableStencilFormat8;
	[EAGLContext setCurrentContext:self.context];
	self.preferredFramesPerSecond = 60;  // NOTE: We don't yet take advantage of 120hz screens

	[[DisplayManager shared] updateResolution:[UIScreen mainScreen]];

	graphicsContext = new IOSGLESContext();

	graphicsContext->GetDrawContext()->SetErrorCallback([](const char *shortDesc, const char *details, void *userdata) {
		g_OSD.Show(OSDType::MESSAGE_ERROR, details, 0.0f, "error_callback");
	}, nullptr);

	graphicsContext->ThreadStart();

	/*self.iCadeView = [[iCadeReaderView alloc] init];
	[self.view addSubview:self.iCadeView];
	self.iCadeView.delegate = self;
	self.iCadeView.active = YES;*/

	if ([GCController class]) {
		if ([[GCController controllers] count] > 0) {
			[self setupController:[[GCController controllers] firstObject]];
		}
	}

	cameraHelper = [[CameraHelper alloc] init];
	[cameraHelper setDelegate:self];

	locationHelper = [[LocationHelper alloc] init];
	[locationHelper setDelegate:self];

	[self hideKeyboard];

	// Was previously DISPATCH_QUEUE_PRIORITY_HIGH.
	dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
		NativeInitGraphics(graphicsContext);

		INFO_LOG(SYSTEM, "Emulation thread starting\n");
		while (threadEnabled) {
			NativeFrame(graphicsContext);
		}

		INFO_LOG(SYSTEM, "Emulation thread shutting down\n");
		NativeShutdownGraphics();

		// Also ask the main thread to stop, so it doesn't hang waiting for a new frame.
		INFO_LOG(SYSTEM, "Emulation thread stopping\n");
		graphicsContext->StopThread();

		threadStopped = true;
	});
}

- (void)handleSwipeFrom:(UIScreenEdgePanGestureRecognizer *)recognizer
{
	if (recognizer.state == UIGestureRecognizerStateEnded) {
		KeyInput key;
		key.flags = KEY_DOWN | KEY_UP;
		key.keyCode = NKCODE_BACK;
		key.deviceId = DEVICE_ID_TOUCH;
		NativeKey(key);
		INFO_LOG(SYSTEM, "Detected back swipe");
	}
}

- (void)appWillTerminate:(NSNotification *)notification
{
	[self shutdown];
}

- (void)shutdown
{
	if (sharedViewController == nil) {
		return;
	}

	iOSCoreAudioShutdown();

	if (threadEnabled) {
		threadEnabled = false;
		while (graphicsContext->ThreadFrame()) {
			continue;
		}
		while (!threadStopped) {}
		graphicsContext->ThreadEnd();
	}

	sharedViewController = nil;

	if (self.context) {
		if ([EAGLContext currentContext] == self.context) {
			[EAGLContext setCurrentContext:nil];
		}
		self.context = nil;
	}

	[[NSNotificationCenter defaultCenter] removeObserver:self];

	if ([GCController class]) {
		self.gameController = nil;
	}

	if (graphicsContext) {
		graphicsContext->Shutdown();
		delete graphicsContext;
		graphicsContext = NULL;
	}

	NativeShutdown();
}

- (void)dealloc
{
	[self shutdown];
}

- (NSUInteger)supportedInterfaceOrientations
{
	return UIInterfaceOrientationMaskLandscape;
}

- (void)glkView:(GLKView *)view drawInRect:(CGRect)rect
{
	if (sharedViewController)
		graphicsContext->ThreadFrame();
}

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
	g_touchTracker.Began(touches, self.view);
}

- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
	g_touchTracker.Moved(touches, self.view);
}

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
	g_touchTracker.Ended(touches, self.view);
}

- (void)touchesCancelled:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{
	g_touchTracker.Cancelled(touches, self.view);
}

- (void)bindDefaultFBO
{
	[(GLKView*)self.view bindDrawable];
}

- (void)buttonDown:(iCadeState)button
{
	g_iCadeTracker.ButtonDown(button);
}

- (void)buttonUp:(iCadeState)button
{
	g_iCadeTracker.ButtonUp(button);
}

- (void)controllerDidConnect:(NSNotification *)note
{
	if (![[GCController controllers] containsObject:self.gameController]) self.gameController = nil;

	if (self.gameController != nil) return; // already have a connected controller

	[self setupController:(GCController *)note.object];
}

- (void)controllerDidDisconnect:(NSNotification *)note
{
	if (self.gameController == note.object) {
		self.gameController = nil;

		if ([[GCController controllers] count] > 0) {
			[self setupController:[[GCController controllers] firstObject]];
		}
	}
}

// Enables tapping for edge area.
-(UIRectEdge)preferredScreenEdgesDeferringSystemGestures
{
	return UIRectEdgeAll;
}

- (UIView *)getView {
	return [self view];
}

- (void)setupController:(GCController *)controller
{
	self.gameController = controller;
	if (!SetupController(controller)) {
		self.gameController = nil;
	}
}

- (void)startVideo:(int)width height:(int)height {
	[cameraHelper startVideo:width h:height];
}

- (void)stopVideo {
	[cameraHelper stopVideo];
}

- (void)PushCameraImageIOS:(long long)len buffer:(unsigned char*)data {
	Camera::pushCameraImage(len, data);
}

- (void)startLocation {
	[locationHelper startLocationUpdates];
}

- (void)stopLocation {
	[locationHelper stopLocationUpdates];
}

- (void)SetGpsDataIOS:(CLLocation *)newLocation {
	GPS::setGpsData((long long)newLocation.timestamp.timeIntervalSince1970,
					newLocation.horizontalAccuracy/5.0,
					newLocation.coordinate.latitude, newLocation.coordinate.longitude,
					newLocation.altitude,
					MAX(newLocation.speed * 3.6, 0.0), /* m/s to km/h */
					0 /* bearing */);
}

// The below is inspired by https://stackoverflow.com/questions/7253477/how-to-display-the-iphone-ipad-keyboard-over-a-full-screen-opengl-es-app
// It's a bit limited but good enough.

-(void) deleteBackward {
	KeyInput input{};
	input.deviceId = DEVICE_ID_KEYBOARD;
	input.flags = KEY_DOWN | KEY_UP;
	input.keyCode = NKCODE_DEL;
	NativeKey(input);
	INFO_LOG(SYSTEM, "Backspace");
}

-(BOOL) hasText
{
	return YES;
}

-(void) insertText:(NSString *)text
{
	std::string str = std::string([text UTF8String]);
	INFO_LOG(SYSTEM, "Chars: %s", str.c_str());
	UTF8 chars(str);
	while (!chars.end()) {
		uint32_t codePoint = chars.next();
		KeyInput input{};
		input.deviceId = DEVICE_ID_KEYBOARD;
		input.flags = KEY_CHAR;
		input.unicodeChar = codePoint;
		NativeKey(input);
	}
}

-(BOOL) canBecomeFirstResponder
{
	return YES;
}

-(void) showKeyboard {
	dispatch_async(dispatch_get_main_queue(), ^{
		[self becomeFirstResponder];
	});
}

-(void) hideKeyboard {
	dispatch_async(dispatch_get_main_queue(), ^{
		[self resignFirstResponder];
	});
}

@end

void bindDefaultFBO()
{
	[sharedViewController bindDefaultFBO];
}

void EnableFZ(){};
void DisableFZ(){};