PeachDrawing.Core
PeachDrawing.Core
PixelMath Class
Integer pixel arithmetic shared by every raster consumer of PixelBuffer and RasterSurface.
public static class PixelMath
Inheritance System.Object → PixelMath
| Methods | |
|---|---|
| Div255(int) | x / 255, rounded to nearest: the exact result for every product of two 8-bit values (0..65025), without a division. This is how a channel is scaled by an alpha or coverage byte. |
| Premultiply(Span<byte>) | Premultiplies straight-alpha RGBA8 in place: each colour channel is scaled by the pixel’s alpha. |
| Unpremultiply(ReadOnlySpan<byte>, Span<byte>) | Converts premultiplied RGBA8 to straight alpha into destination (same length). |