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# MTLBlendOperation

For every pixel, `MTLBlendOperation` determines how to combine and weight the source fragment values with the destination values. Some blend operations multiply the source values by a source blend factor (SBF), multiply the destination values by a destination blend factor (DBF), and then combine the results using addition or subtraction. Other blend operations use either a minimum or maximum function to determine the result.

```
enum MTLBlendOperation
```

## Topics

### Blend operations

[`MTLBlendOperation.add`](/documentation/Metal/MTLBlendOperation/add)

Add portions of both source and destination pixel values.

[`MTLBlendOperation.subtract`](/documentation/Metal/MTLBlendOperation/subtract)

Subtract a portion of the destination pixel values from a portion of the source.

[`MTLBlendOperation.reverseSubtract`](/documentation/Metal/MTLBlendOperation/reverseSubtract)

Subtract a portion of the source values from a portion of the destination pixel values.

[`MTLBlendOperation.min`](/documentation/Metal/MTLBlendOperation/min)

Minimum of the source and destination pixel values.

[`MTLBlendOperation.max`](/documentation/Metal/MTLBlendOperation/max)

Maximum of the source and destination pixel values.


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