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LcdDistributionLut

agg_rust::pixfmt_lcd

Struct LcdDistributionLut 

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pub struct LcdDistributionLut { /* private fields */ }
Expand description

Lookup table for LCD subpixel coverage distribution.

Distributes each coverage value across primary (center), secondary (adjacent), and tertiary (2-away) positions. This implements the energy distribution described in Steve Gibson’s subpixel rendering guide.

Port of C++ lcd_distribution_lut from agg_pixfmt_rgb24_lcd.h.

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impl LcdDistributionLut

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pub fn new(prim: f64, second: f64, tert: f64) -> Self

Create a new LCD distribution lookup table.

§Arguments
  • prim — Weight for the primary (center) subpixel
  • second — Weight for the secondary (adjacent) subpixels
  • tert — Weight for the tertiary (2-away) subpixels

Weights are normalized so that prim + 2*second + 2*tert = 1.0.

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pub fn primary(&self, v: u8) -> u8

Get the primary (center) distribution for a coverage value.

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pub fn secondary(&self, v: u8) -> u8

Get the secondary (adjacent) distribution for a coverage value.

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pub fn tertiary(&self, v: u8) -> u8

Get the tertiary (2-away) distribution for a coverage value.

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