Open Radar

 
Summary:
When you have an SKTexture, and you create another texture with a CIFilter, the original texture is always retained and will not be released until the texture with the filter applied is dealloc'd. This can be a potential issue, as if I wanted to load the spaceship image, make it black and white, then blur it, it would require 3 textures to stay in memory at all times, even though only the effected texture may ever be on the screen.

Steps to Reproduce:
1. Create an SKTexture
2. Create a texture with a filter applied using -[SKTexture textureByApplyingCIFilter:]

This minimal code demonstrates the result. When run in instruments, single taps always tick up the count of live SKTextures, while double taps drop it down to the original number.


@interface GameScene()

@property (weak, nonatomic) SKSpriteNode *ship;

@end

@implementation GameScene

-(void)didMoveToView:(SKView *)view {
    SKSpriteNode *sprite = [SKSpriteNode spriteNodeWithImageNamed:@"Spaceship"];

    sprite.xScale = 1.5;
    sprite.yScale = 1.5;
    sprite.position = CGPointMake(500, 500);

    [self addChild:sprite];
    self.ship = sprite;
}

-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    if (touches.count == 1) {
        self.ship.texture = [self.ship.texture textureByApplyingCIFilter:[CIFilter filterWithName:@"CIGaussianBlur"]];
    } else {
        self.ship.texture = [SKTexture textureWithImageNamed:@"Spaceship"];
    }
}

@end

Expected Results:
The # of textures in memory should stay the same, as only one texture is being shown to the user.

Actual Results:
The number of textures in memory will tick up each time, even though one texture is ever being shown to the user.

Version:
8.1.3 (12B466)

Notes:


Configuration:
Any iPhone or iPad, Sim or device

Attachments: