# `GSCompositingOperation.GSCompositingOperationSourceAtop`

*Type Property*

`COMPOSITE_SRC_ATOP`        `kCGBlendModeSourceAtop`       `NSCompositingOperationSourceAtop`

## Declaration

```swift
static let sourceAtop: GSCompositingOperation
```

```objc
extern GSCompositingOperation const GSCompositingOperationSourceAtop;
```

```python
GSCompositingOperationSourceAtop: GSCompositingOperation
```