From 50f6acc739f24bfa2ca080d08e90d82f8fa83543 Mon Sep 17 00:00:00 2001 From: Volpeon Date: Thu, 17 Oct 2024 16:45:00 +0200 Subject: Revamped variable management --- src_old/functions/colors/_apca.scss | 127 +++++++++++++++++++++++++++++++++++ src_old/functions/colors/_index.scss | 1 + 2 files changed, 128 insertions(+) create mode 100644 src_old/functions/colors/_apca.scss create mode 100644 src_old/functions/colors/_index.scss (limited to 'src_old/functions/colors') diff --git a/src_old/functions/colors/_apca.scss b/src_old/functions/colors/_apca.scss new file mode 100644 index 0000000..0c03529 --- /dev/null +++ b/src_old/functions/colors/_apca.scss @@ -0,0 +1,127 @@ +/* stylelint-disable scss/dollar-variable-pattern */ +/* stylelint-disable scss/at-function-pattern */ + +@use 'sass:color'; +@use 'sass:list'; +@use 'sass:map'; +@use 'sass:math'; + +$SA98G: ( + mainTRC: 2.4, + + sRco: .2126729, + sGco: .7151522, + sBco: .072175, + + normBG: .56, + normTXT: .57, + revTXT: .62, + revBG: .65, + + blkThrs: .022, + blkClmp: 1.414, + scaleBoW: 1.14, + scaleWoB: 1.14, + loBoWoffset: .027, + loWoBoffset: .027, + deltaYmin: .0005, + loClip: .0001, + + mFactor: 1.9468554433171, + mOffsetIn: .0387393816571401, + mExpAdj: .283343396420869, + mOffsetOut: .312865795870758, +); + +@function apca_sRGB_to_Y($color) { + $rgb: color.to-space($color, rgb); + + @return map.get($SA98G, sRco) * math.pow(math.div(color.channel($rgb, 'red'), 255), map.get($SA98G, mainTRC)) + + map.get($SA98G, sGco) * math.pow(math.div(color.channel($rgb, 'green'), 255), map.get($SA98G, mainTRC)) + + map.get($SA98G, sBco) * math.pow(math.div(color.channel($rgb, 'blue'), 255), map.get($SA98G, mainTRC)); +} + +@function apca_Y_to_sRGB($y) { + $c: math.round(math.pow($y, math.div(1, map.get($SA98G, mainTRC))) * 255); + @return rgb($c, $c, $c); +} + +@function apcaContrast($txtY, $bgY) { + /* stylelint-disable-next-line @stylistic/number-no-trailing-zeros */ + $icp: .0 1.1; + + @if math.min($txtY, $bgY) < list.nth($icp, 1) or math.max($txtY, $bgY) > list.nth($icp, 2) { + @return 0; + } + + @if $txtY <= map.get($SA98G, blkThrs) { + $txtY: $txtY + math.pow(map.get($SA98G, blkThrs) - $txtY, map.get($SA98G, blkClmp)); + } + @if $bgY <= map.get($SA98G, blkThrs) { + $bgY: $bgY + math.pow(map.get($SA98G, blkThrs) - $bgY, map.get($SA98G, blkClmp)); + } + + @if math.abs($bgY - $txtY) < map.get($SA98G, deltaYmin) { + @return 0; + } + + $outputContrast: 0; + + @if $bgY > $txtY { + $SAPC: map.get($SA98G, scaleBoW) * (math.pow($bgY, map.get($SA98G, normBG)) - math.pow($txtY, map.get($SA98G, normTXT))); + + @if $SAPC >= map.get($SA98G, loClip) { + $outputContrast: $SAPC - map.get($SA98G, loBoWoffset); + } + } @else { + $SAPC: map.get($SA98G, scaleWoB) * (math.pow($bgY, map.get($SA98G, revBG)) - math.pow($txtY, map.get($SA98G, revTXT))); + + @if $SAPC <= -1 * map.get($SA98G, loClip) { + $outputContrast: $SAPC + map.get($SA98G, loWoBoffset); + } + } + + @return $outputContrast * 100; +} + +@function apcaReverse($contrast, $knownY, $knownType: 'bg') { + $unknownY: $knownY; + + $knownExp: 0; + $unknownExp: 0; + + $scale: map.get($SA98G, if($contrast > 0, scaleBoW, scaleWoB)); + $offset: map.get($SA98G, if($contrast > 0, loBoWoffset, loWoBoffset)); + + $contrast: math.div($contrast * .01 + $offset, $scale); + + @if $knownY <= map.get($SA98G, blkThrs) { + $knownY: $knownY + math.pow(map.get($SA98G, blkThrs) - $knownY, map.get($SA98G, blkClmp)); + } + + @if $knownType == 'bg' { + $knownExp: map.get($SA98G, if($contrast > 0, normBG, revBG)); + $unknownExp: map.get($SA98G, if($contrast > 0, normTXT, revTXT)); + $unknownY: math.pow(math.pow($knownY, $knownExp) - $contrast, math.div(1, $unknownExp)); + } @else { + $knownExp: map.get($SA98G, if($contrast > 0, normTXT, revTXT)); + $unknownExp: map.get($SA98G, if($contrast > 0, normBG, revBG)); + $unknownY: math.pow($contrast + math.pow($knownY, $knownExp), math.div(1, $unknownExp)); + } + + @if '#{$unknownY}' == '#{math.sqrt(-1)}' { + @return false; + } + + @if $unknownY > 1.06 or $unknownY < 0 { + @return false; + } + + @if $unknownY <= map.get($SA98G, blkThrs) { + $unknownY: math.pow(($unknownY + map.get($SA98G, mOffsetIn)) * map.get($SA98G, mFactor), math.div(map.get($SA98G, mExpAdj), map.get($SA98G, blkClmp))) * math.div(1, map.get($SA98G, mFactor)) - map.get($SA98G, mOffsetOut); + } + + $unknownY: math.max(math.min($unknownY, 1), 0); + + @return $unknownY; +} diff --git a/src_old/functions/colors/_index.scss b/src_old/functions/colors/_index.scss new file mode 100644 index 0000000..9dad0f9 --- /dev/null +++ b/src_old/functions/colors/_index.scss @@ -0,0 +1 @@ +@forward 'apca'; -- cgit v1.2.3-70-g09d2