SKPngEncoderFilterFlags Enum
Definition
Important
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Various row filters to use when encoding a PNG.
This enumeration supports a bitwise combination of its member values.
[System.Flags]
public enum SKPngEncoderFilterFlags- Inheritance
-
SKPngEncoderFilterFlags
- Attributes
Fields
| Name | Value | Description |
|---|---|---|
| NoFilters | 0 | Do not use any filters. |
| None | 8 | Transmit unmodified. |
| Sub | 16 | Transmit the difference between each byte and the value of the corresponding byte of the prior pixel. [Sub(x) = Raw(x) - Raw(x-bpp)] |
| Up | 32 | Transmit the difference between each byte and the value of the corresponding byte of the pixel above. [Up(x) = Raw(x) - Prior(x)] |
| Avg | 64 | Use the average of the two neighboring pixels (left and above) to predict the value of a pixel. [Average(x) = Raw(x) - floor((Raw(x-bpp)+Prior(x))/2)] |
| Paeth | 128 | Compute a simple linear function of the three neighboring pixels (left, above, upper left), then chooses as predictor the neighboring pixel closest to the computed value. [Paeth(x) = Raw(x) - PaethPredictor(Raw(x-bpp), Prior(x), Prior(x-bpp))] |
| AllFilters | 248 | Try all the filters. |
