import { clamp , multiplyMatrices } from '../../utils/math' ; import type { FilterConfig } from '../../definitions' ; export function createFilterMatrix ( config ) { let m = Matrix . identity ( ) ; if ( config . sepia !== 0 ) { m = multiplyMatrices ( m , Matrix . sepia ( config . sepia / 100 ) ) ; } if ( config . grayscale !== 0 ) { m = multiplyMatrices ( m , Matrix . grayscale ( config . grayscale / 100 ) ) ; } if ( config . contrast !== 100 ) { m = multiplyMatrices ( m , Matrix . contrast ( config . contrast / 100 ) ) ; } if ( config . brightness !== 100 ) { m = multiplyMatrices ( m , Matrix . brightness ( config . brightness / 100 ) ) ; } if ( config . mode === 1 ) { m = multiplyMatrices ( m , Matrix . invertNHue ( ) ) ; } return m ; } export function applyColorMatrix ( [ r , g , b ] , matrix ) { const rgb = [ [ r / 255 ] , [ g / 255 ] , [ b / 255 ] , [ 1 ] , [ 1 ] ] ; const result = multiplyMatrices ( matrix , rgb ) ; return [ 0 , 1 , 2 ] . map ( ( i ) => clamp ( Math . round ( result [ i ] [ 0 ] * 255 ) , 0 , 255 ) ) ; } export const Matrix = { identity ( ) { return [ [ 1 , 0 , 0 , 0 , 0 ] , [ 0 , 1 , 0 , 0 , 0 ] , [ 0 , 0 , 1 , 0 , 0 ] , [ 0 , 0 , 0 , 1 , 0 ] , [ 0 , 0 , 0 , 0 , 1 ] ] ; } , invertNHue ( ) { return [ [ 0.333 , - 0.667 , - 0.667 , 0 , 1 ] , [ - 0.667 , 0.333 , - 0.667 , 0 , 1 ] , [ - 0.667 , - 0.667 , 0.333 , 0 , 1 ] , [ 0 , 0 , 0 , 1 , 0 ] , [ 0 , 0 , 0 , 0 , 1 ] ] ; } , brightness ( v ) { return [ [ v , 0 , 0 , 0 , 0 ] , [ 0 , v , 0 , 0 , 0 ] , [ 0 , 0 , v , 0 , 0 ] , [ 0 , 0 , 0 , 1 , 0 ] , [ 0 , 0 , 0 , 0 , 1 ] ] ; } , contrast ( v ) { const t = ( 1 - v ) / 2 ; return [ [ v , 0 , 0 , 0 , t ] , [ 0 , v , 0 , 0 , t ] , [ 0 , 0 , v , 0 , t ] , [ 0 , 0 , 0 , 1 , 0 ] , [ 0 , 0 , 0 , 0 , 1 ] ] ; } , sepia ( v ) { return [ [ ( 0.393 + 0.607 * ( 1 - v ) ) , ( 0.769 - 0.769 * ( 1 - v ) ) , ( 0.189 - 0.189 * ( 1 - v ) ) , 0 , 0 ] , [ ( 0.349 - 0.349 * ( 1 - v ) ) , ( 0.686 + 0.314 * ( 1 - v ) ) , ( 0.168 - 0.168 * ( 1 - v ) ) , 0 , 0 ] , [ ( 0.272 - 0.272 * ( 1 - v ) ) , ( 0.534 - 0.534 * ( 1 - v ) ) , ( 0.131 + 0.869 * ( 1 - v ) ) , 0 , 0 ] , [ 0 , 0 , 0 , 1 , 0 ] , [ 0 , 0 , 0 , 0 , 1 ] ] ; } , grayscale ( v ) { return [ [ ( 0.2126 + 0.7874 * ( 1 - v ) ) , ( 0.7152 - 0.7152 * ( 1 - v ) ) , ( 0.0722 - 0.0722 * ( 1 - v ) ) , 0 , 0 ] , [ ( 0.2126 - 0.2126 * ( 1 - v ) ) , ( 0.7152 + 0.2848 * ( 1 - v ) ) , ( 0.0722 - 0.0722 * ( 1 - v ) ) , 0 , 0 ] , [ ( 0.2126 - 0.2126 * ( 1 - v ) ) , ( 0.7152 - 0.7152 * ( 1 - v ) ) , ( 0.0722 + 0.9278 * ( 1 - v ) ) , 0 , 0 ] , [ 0 , 0 , 0 , 1 , 0 ] , [ 0 , 0 , 0 , 0 , 1 ] ] ; } , } ;