Auto switch between internal and external display

CMakeLists.txt

@@ -735,6 +735,8 @@ elseif(IOS)
 		ios/main.mm
 		ios/AppDelegate.mm
 		ios/AppDelegate.h
+		ios/DisplayManager.h
+		ios/DisplayManager.mm
 		ios/ViewController.mm
 		ios/ViewController.h
 		ios/iOSCoreAudio.mm

ios/AppDelegate.mm

@@ -1,4 +1,5 @@
 #import "AppDelegate.h"
+#import "DisplayManager.h"
 #import "ViewController.h"
 #import "base/NativeApp.h"
 #import "Core/System.h"
@@ -72,18 +73,7 @@
 }
 
 -(BOOL) application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
-    
-    [[NSNotificationCenter defaultCenter] addObserverForName:UIScreenDidConnectNotification object:nil queue:nil usingBlock:^(NSNotification * _Nonnull notification) {
-        UIScreen* screen = (UIScreen*)notification.object;
-        self.screen = screen;
-        
-        NSLog(@"Display connected: %@", screen.debugDescription);
-        UIScreenMode* mode = screen.availableModes[screen.availableModes.count - 1];
-        [screen setCurrentMode:mode];
-        [screen setOverscanCompensation:UIScreenOverscanCompensationNone];
-        
-        self.window = [[UIWindow alloc] initWithFrame:[screen bounds]];
-        [self.window setScreen:screen];
+	self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
 	self.viewController = [[ViewController alloc] init];
 	
 	[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(handleAudioSessionInterruption:) name:AVAudioSessionInterruptionNotification object:[AVAudioSession sharedInstance]];
@@ -92,7 +82,6 @@
 	
 	self.window.rootViewController = self.viewController;
 	[self.window makeKeyAndVisible];
-    }];
 	
 	return YES;
 }

ios/DisplayManager.h

@@ -0,0 +1,24 @@
+//
+//  DisplayManager.h
+//  native
+//
+//  Created by xieyi on 2019/6/9.
+//
+
+#import <Foundation/Foundation.h>
+#import <UIKit/UIKit.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface DisplayManager : NSObject
+
+- (void)setupDisplayListener;
+- (void)updateResolution:(UIScreen *)screen;
+
+@property (nonatomic, strong) UIScreen *mainScreen;
+
+@property (class, readonly, strong) DisplayManager *shared;
+
+@end
+
+NS_ASSUME_NONNULL_END

ios/DisplayManager.mm

@@ -0,0 +1,139 @@
+//
+//  DisplayManager.m
+//  native
+//
+//  Created by xieyi on 2019/6/9.
+//
+
+#import "DisplayManager.h"
+#import "ViewController.h"
+#import "AppDelegate.h"
+#include "base/display.h"
+#include "base/NativeApp.h"
+#include "Core/System.h"
+
+#define IS_IPAD() ([UIDevice currentDevice].userInterfaceIdiom == UIUserInterfaceIdiomPad)
+
+@interface DisplayManager ()
+
+@property BOOL listenerActive;
+@property (atomic, retain) NSMutableArray<UIScreen *> *extDisplays;
+
+- (void)updateScreen:(UIScreen *)screen;
+
+@end
+
+@implementation DisplayManager
+
+- (instancetype)init
+{
+	self = [super init];
+	if (self) {
+		[self setListenerActive:NO];
+		[self setExtDisplays:[[NSMutableArray<UIScreen *> alloc] init]];
+	}
+	return self;
+}
+
++ (DisplayManager *)shared {
+	static DisplayManager *sharedInstance = nil;
+	static dispatch_once_t onceToken;
+	dispatch_once(&onceToken, ^{
+		sharedInstance = [[DisplayManager alloc] init];
+	});
+	return sharedInstance;
+}
+
+- (void)setupDisplayListener {
+	if ([self listenerActive]) {
+		NSLog(@"setupDisplayListener already called");
+		return;
+	}
+	NSLog(@"Setting up display manager");
+	[self setMainScreen:[UIScreen mainScreen]];
+	// Display connected
+	[[NSNotificationCenter defaultCenter] addObserverForName:UIScreenDidConnectNotification object:nil queue:nil usingBlock:^(NSNotification * _Nonnull notification) {
+		UIScreen *screen = (UIScreen *) notification.object;
+		NSLog(@"New display connected: %@", [screen debugDescription]);
+		[[self extDisplays] addObject:screen];
+		// Do not switch to second connected display
+		if ([self mainScreen] != [UIScreen mainScreen]) {
+			return;
+		}
+		[self updateScreen:screen];
+	}];
+	// Display disconnected
+	[[NSNotificationCenter defaultCenter] addObserverForName:UIScreenDidDisconnectNotification object:nil queue:nil usingBlock:^(NSNotification * _Nonnull notification) {
+		UIScreen *screen = (UIScreen *) notification.object;
+		NSLog(@"Display disconnected: %@", [screen debugDescription]);
+		if ([[self extDisplays] containsObject:screen]) {
+			[[self extDisplays] removeObject:screen];
+		}
+		if ([[self extDisplays] count] > 0) {
+			UIScreen *newScreen = [[self extDisplays] lastObject];
+			[self updateScreen:newScreen];
+		} else {
+			[self updateScreen:[UIScreen mainScreen]];
+		}
+	}];
+	[self setListenerActive:YES];
+}
+
+- (void)updateScreen:(UIScreen *)screen {
+	[self setMainScreen:screen];
+	UIWindow *gameWindow = [(AppDelegate *)[[UIApplication sharedApplication] delegate] window];
+	[gameWindow setScreen:screen];
+	// Set optimal resolution
+	// Dispatch later to prevent "no window is preset" error
+	dispatch_async(dispatch_get_main_queue(), ^{
+		if (screen != [UIScreen mainScreen]) {
+			NSUInteger count = [[screen availableModes] count];
+			UIScreenMode* mode = [screen availableModes][count - 1];
+			[screen setCurrentMode:mode];
+			[screen setOverscanCompensation:UIScreenOverscanCompensationNone];
+		}
+		[self updateResolution:screen];
+	});
+}
+
+- (void)updateResolution:(UIScreen *)screen {
+	float scale = screen.scale;
+	
+	if ([screen respondsToSelector:@selector(nativeScale)]) {
+		scale = screen.nativeScale;
+	}
+	
+	CGSize size = screen.applicationFrame.size;
+	
+	if (size.height > size.width) {
+		float h = size.height;
+		size.height = size.width;
+		size.width = h;
+	}
+	
+	g_dpi = (IS_IPAD() ? 200.0f : 150.0f) * scale;
+	g_dpi_scale_x = 240.0f / g_dpi;
+	g_dpi_scale_y = 240.0f / g_dpi;
+	g_dpi_scale_real_x = g_dpi_scale_x;
+	g_dpi_scale_real_y = g_dpi_scale_y;
+	pixel_xres = size.width * scale;
+	pixel_yres = size.height * scale;
+	
+	dp_xres = pixel_xres * g_dpi_scale_x;
+	dp_yres = pixel_yres * g_dpi_scale_y;
+	
+	pixel_in_dps_x = (float)pixel_xres / (float)dp_xres;
+	pixel_in_dps_y = (float)pixel_yres / (float)dp_yres;
+	
+	[[sharedViewController view] setContentScaleFactor:scale];
+	
+	// PSP native resize
+	PSP_CoreParameter().pixelWidth = pixel_xres;
+	PSP_CoreParameter().pixelHeight = pixel_yres;
+	
+	NativeResized();
+	
+	NSLog(@"Updated display resolution: (%d, %d) @%.1fx", pixel_xres, pixel_yres, scale);
+}
+
+@end

ios/ViewController.mm

@@ -7,6 +7,7 @@
 
 #import "AppDelegate.h"
 #import "ViewController.h"
+#import "DisplayManager.h"
 #import "SubtleVolume.h"
 #import <GLKit/GLKit.h>
 #include <cassert>
@@ -144,6 +145,7 @@ static GraphicsContext *graphicsContext;
 
 - (void)viewDidLoad {
 	[super viewDidLoad];
+	[[DisplayManager shared] setupDisplayListener];
 
     UIScreen* screen = [(AppDelegate*)[UIApplication sharedApplication].delegate screen];
 	self.view.frame = [screen bounds];
@@ -163,34 +165,7 @@ static GraphicsContext *graphicsContext;
 	// Might be useful for a speed boot, sacrificing resolution:
 	view.contentScaleFactor = screen.scale;
 
-	float scale = screen.scale;
-    
-	
-	if ([screen respondsToSelector:@selector(nativeScale)]) {
-		scale = screen.nativeScale;
-	}
-
-	CGSize size = [[UIApplication sharedApplication].delegate window].frame.size;
-
-	if (size.height > size.width) {
-		float h = size.height;
-		size.height = size.width;
-		size.width = h;
-	}
-
-	g_dpi = (IS_IPAD() ? 200.0f : 150.0f) * scale;
-    g_dpi_scale_x = 1;//240.0f / g_dpi;
-    g_dpi_scale_y = 1;//240.0f / g_dpi;
-	g_dpi_scale_real_x = g_dpi_scale_x;
-	g_dpi_scale_real_y = g_dpi_scale_y;
-	pixel_xres = size.width * scale;
-	pixel_yres = size.height * scale;
-
-	dp_xres = pixel_xres * g_dpi_scale_x;
-	dp_yres = pixel_yres * g_dpi_scale_y;
-
-	pixel_in_dps_x = (float)pixel_xres / (float)dp_xres;
-	pixel_in_dps_y = (float)pixel_yres / (float)dp_yres;
+	[[DisplayManager shared] updateResolution:[UIScreen mainScreen]];
 
 	graphicsContext = new IOSGraphicsContext();