Aegisub/src/retina_helper.mm

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// Copyright (c) 2013, Thomas Goyne <plorkyeran@aegisub.org>
//
// Permission to use, copy, modify, and distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
//
// Aegisub Project http://www.aegisub.org/
#include "retina_helper.h"
#include <Cocoa/Cocoa.h>
#include <wx/window.h>
@interface RetinaObserver : NSObject
@property (nonatomic, assign) NSWindow *window;
@property (nonatomic, copy) void (^block)();
@end
@implementation RetinaObserver
- (void)backingPropertiesDidChange:(NSNotification *)notification {
self.block();
}
- (void)dealloc {
[_block release];
[super dealloc];
}
@end
RetinaHelper::RetinaHelper(wxWindow *window)
: window(window)
, observer([RetinaObserver new])
{
NSView *view = window->GetHandle();
RetinaObserver *obs = (id)observer;
obs.window = view.window;
obs.block = ^{ ScaleFactorChanged(GetScaleFactor()); };
NSNotificationCenter *nc = NSNotificationCenter.defaultCenter;
[nc addObserver:(id)observer
selector:@selector(backingPropertiesDidChange:)
name:NSWindowDidChangeBackingPropertiesNotification
object:view.window];
if ([view respondsToSelector:@selector(setWantsBestResolutionOpenGLSurface:)])
view.wantsBestResolutionOpenGLSurface = YES;
}
RetinaHelper::~RetinaHelper() {
[NSNotificationCenter.defaultCenter removeObserver:(id)observer];
[(id)observer release];
}
int RetinaHelper::GetScaleFactor() const {
return static_cast<int>(window->GetHandle().window.backingScaleFactor);
}