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# setCacheDepthMatchesImageDepth:

Sets whether the image’s offscreen window caches use the same bit depth as the image data itself.

```
- (void) setCacheDepthMatchesImageDepth:(BOOL) flag;
```

## Parameters

`flag`

<doc://com.apple.documentation/documentation/Swift/true> if the offscreen caches use the same bit-depth associated with the image data; otherwise, <doc://com.apple.documentation/documentation/Swift/false> to indicate they should use the default bit depth.

## Discussion

This method does not cause the receiver to recache itself. The default depth limit is equal to the bit depth of the deepest screen on the system.

## See Also

[`func recache()`](/documentation/AppKit/NSImage/recache())

Invalidates and frees offscreen caches of all image representations.

[`func lockFocus()`](/documentation/AppKit/NSImage/lockFocus())

Prepares the image to receive drawing commands.

[`- (BOOL) cacheDepthMatchesImageDepth;`](/documentation/AppKit/NSImage/cacheDepthMatchesImageDepth)

Returns a Boolean value that indicates whether an image’s offscreen window caches use the same bit depth as the image data itself.


---

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