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c1675913a2
Ever since we started bundling the app with webpack, there’s been less and less overlap between our ‘static’ directory (files belonging to the frontend app) and Django’s interpretation of the ‘static’ directory (files served directly to the web). Split the app out to its own ‘web’ directory outside of ‘static’, and remove all the custom collectstatic --ignore rules. This makes it much clearer what’s actually being served to the web, and what’s being bundled by webpack. It also shrinks the release tarball by 3%. Signed-off-by: Anders Kaseorg <anders@zulip.com>
33 lines
971 B
TypeScript
33 lines
971 B
TypeScript
// Convert an sRGB value in [0, 255] to a linear intensity
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// value in [0, 1].
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//
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// https://en.wikipedia.org/wiki/SRGB#The_reverse_transformation
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export function sRGB_to_linear(v: number): number {
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v = v / 255;
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if (v <= 0.04045) {
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return v / 12.92;
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}
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return Math.pow((v + 0.055) / 1.055, 2.4);
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}
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// Compute luminance (CIE Y stimulus) from linear intensity
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// of sRGB / Rec. 709 primaries.
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export function rgb_luminance(channel: [number, number, number]): number {
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return 0.2126 * channel[0] + 0.7152 * channel[1] + 0.0722 * channel[2];
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}
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// Convert luminance (photometric, CIE Y)
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// to lightness (perceptual, CIE L*)
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//
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// https://en.wikipedia.org/wiki/Lab_color_space#Forward_transformation
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export function luminance_to_lightness(luminance: number): number {
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let v;
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if (luminance <= 216 / 24389) {
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v = (841 / 108) * luminance + 4 / 29;
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} else {
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v = Math.pow(luminance, 1 / 3);
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}
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return 116 * v - 16;
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}
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