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FlutterBackBufferCache Class Reference

`#import <FlutterSurfaceManager.h>`

Inheritance diagram for FlutterBackBufferCache:

## Instance Methods
(nullable FlutterSurface *) | - removeSurfaceForSize:
(void) | - replaceSurfaces:
(NSUInteger) | - count

## Detailed Description

Cache of back buffers to prevent unnecessary IOSurface allocations.

Definition at line 77 of file FlutterSurfaceManager.h.

## Method Documentation

## ◆ count

- (NSUInteger) count |  |  |

Returns number of surfaces currently in cache. Used for tests.

Definition at line 277 of file FlutterSurfaceManager.mm.

277 {
278 @synchronized(self) {
279 return _surfaces.count;
280 }
281 }

Referenced by flutter::testing::TEST().

## ◆ removeSurfaceForSize:

- (nullable FlutterSurface *) removeSurfaceForSize: |  | (CGSize) | size |

Removes surface with given size from cache (if available) and returns it.

Definition at line 253 of file FlutterSurfaceManager.mm.

253 :(CGSize)size {
254 @synchronized(self) {
255 for (FlutterSurface* surface in _surfaces) {
256 if (CGSizeEqualToSize(surface.size, size)) {
257 // By default ARC doesn't retain enumeration iteration variables.
258 FlutterSurface* res = surface;
259 [_surfaces removeObject:surface];
260 return res;
261 }
262 }
263 return nil;
264 }
265 }

References FlutterSurface::size.

## ◆ replaceSurfaces:

- (void) replaceSurfaces: |  | (nonnull NSArray<FlutterSurface*>*) | surfaces |

Removes all cached surfaces replacing them with new ones.

Definition at line 267 of file FlutterSurfaceManager.mm.

267 :(nonnull NSArray<FlutterSurface*>*)surfaces {
268 @synchronized(self) {
269 [_surfaces removeAllObjects];
270 [_surfaces addObjectsFromArray:surfaces];
271 }
272
273 // performSelector:withObject:afterDelay needs to be performed on RunLoop thread
274 [self performSelectorOnMainThread:@selector(reschedule) withObject:nil waitUntilDone:NO];
275 }

The documentation for this class was generated from the following files:

- shell/platform/darwin/macos/framework/Source/FlutterSurfaceManager.h
- shell/platform/darwin/macos/framework/Source/FlutterSurfaceManager.mm

FlutterSurface
Definition: FlutterSurface.h:13