azahar/src/citra_qt/qt_swizzle.mm

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// Copyright Citra Emulator Project / Azahar Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#import <QtGui/private/qmetallayer_p.h>
#import <objc/runtime.h>
namespace QtSwizzle {
void Dummy() {
// Call this anywhere to make sure that qt_swizzle.mm is linked.
// noop
}
} // namespace QtSwizzle
@implementation QMetalLayer (AzaharPatch)
+ (void)load {
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
Class targetClass = [self class];
// Get the original and swizzled methods
Method originalMethod =
class_getInstanceMethod(targetClass, @selector(setNeedsDisplayInRect:));
Method swizzledMethod =
class_getInstanceMethod(targetClass, @selector(swizzled_setNeedsDisplayInRect:));
// Swap the implementations
method_exchangeImplementations(originalMethod, swizzledMethod);
});
}
- (void)swizzled_setNeedsDisplayInRect:(CGRect)rect {
constexpr auto tooBig = 1e10; // Arbitrary large number
// Check for problematic huge rectangles
if ((!self.needsDisplay) && (rect.size.width > tooBig || rect.size.height > tooBig ||
rect.origin.x < -tooBig || rect.origin.y < -tooBig)) {
return;
}
// Call the original implementation
[self swizzled_setNeedsDisplayInRect:rect];
}
@end