minivmac4ios/Mini vMac/ScreenView.m

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//
// ScreenView.m
// Mini vMac
//
// Created by Jesús A. Álvarez on 30/04/2016.
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// Copyright © 2016-2018 namedfork. All rights reserved.
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//
#import "ScreenView.h"
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#import "AppDelegate.h"
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static ScreenView *sharedScreenView = nil;
@implementation ScreenView
{
CGImageRef screenImage;
CGRect screenBounds;
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CGSize screenSize;
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CALayer *videoLayer;
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}
- (void)awakeFromNib {
[super awakeFromNib];
sharedScreenView = self;
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videoLayer = [CALayer layer];
NSString *screenFilter = [[NSUserDefaults standardUserDefaults] stringForKey:@"screenFilter"];
videoLayer.magnificationFilter = screenFilter;
videoLayer.minificationFilter = screenFilter;
[self updateVideoLayer];
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[self.layer addSublayer:videoLayer];
[[AppDelegate sharedInstance] addObserver:self forKeyPath:@"sharedEmulator" options:NSKeyValueObservingOptionNew context:NULL];
[[NSUserDefaults standardUserDefaults] addObserver:self forKeyPath:@"screenFilter" options:NSKeyValueObservingOptionNew context:NULL];
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}
+ (instancetype)sharedScreenView {
return sharedScreenView;
}
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- (CGRect)screenBounds {
return screenBounds;
}
- (CGSize)screenSize {
return screenSize;
}
- (void)updateVideoLayer {
videoLayer.contents = nil;
if ([AppDelegate sharedEmulator]) {
[AppDelegate sharedEmulator].screenLayer = videoLayer;
screenSize = [AppDelegate sharedEmulator].screenSize;
} else {
screenSize = CGSizeMake(1, 1);
}
}
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- (void)layoutSubviews {
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[super layoutSubviews];
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CGRect viewBounds = self.bounds;
CGFloat screenScale = MAX(screenSize.width / viewBounds.size.width, screenSize.height / viewBounds.size.height);
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if (screenScale > 0.9 && screenScale <= 1.0) {
screenScale = 1.0;
}
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screenBounds = CGRectMake(0, 0, screenSize.width / screenScale, screenSize.height / screenScale);
screenBounds.origin.x = (viewBounds.size.width - screenBounds.size.width)/2;
screenBounds = CGRectIntegral(screenBounds);
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videoLayer.frame = screenBounds;
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screenBounds.origin.y = self.frame.origin.y;
BOOL scaleIsIntegral = (floor(screenScale) == screenScale);
NSString *screenFilter = scaleIsIntegral ? kCAFilterNearest : [[NSUserDefaults standardUserDefaults] stringForKey:@"screenFilter"];
videoLayer.magnificationFilter = screenFilter;
videoLayer.minificationFilter = screenFilter;
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}
- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary<NSKeyValueChangeKey,id> *)change context:(void *)context {
if ([object isEqual:[NSUserDefaults standardUserDefaults]]) {
if ([keyPath isEqualToString:@"screenFilter"]) {
NSString *value = change[NSKeyValueChangeNewKey];
videoLayer.magnificationFilter = value;
videoLayer.minificationFilter = value;
}
} else if (object == [AppDelegate sharedInstance] && [keyPath isEqualToString:@"sharedEmulator"]) {
[self updateVideoLayer];
[self layoutSubviews];
}
}
- (void)dealloc {
[[NSUserDefaults standardUserDefaults] removeObserver:self forKeyPath:@"screenFilter" context:NULL];
}
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@end