GifAlphaMode Enum
Controls how the GIF encoder maps alpha to GIF's single fully transparent palette entry.
public enum GifAlphaModeFields
| Name | Value | Description |
|---|---|---|
Threshold | 0 | Pixels whose alpha is below GifEncoder.AlphaThreshold become fully transparent; the others become fully opaque. This is the default. |
Flatten | 1 | Composites every pixel over GifEncoder.BackgroundColor, producing a fully opaque image. |