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Add color extraction for audio thumbnails (#14209)
This commit is contained in:
Eugen Rochko
GitHub
parent
2f2ab48b75
commit
99f3a55540
1
Gemfile
1
Gemfile
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@ -48,6 +48,7 @@ gem 'omniauth-cas', '~> 1.1'
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gem 'omniauth-saml', '~> 1.10'
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gem 'omniauth', '~> 1.9'
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gem 'color_diff', '~> 0.1'
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gem 'discard', '~> 1.2'
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gem 'doorkeeper', '~> 5.4'
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gem 'ed25519', '~> 1.2'
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@ -165,6 +165,7 @@ GEM
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cocaine (0.5.8)
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climate_control (>= 0.0.3, < 1.0)
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coderay (1.1.3)
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color_diff (0.1)
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concurrent-ruby (1.1.6)
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connection_pool (2.2.3)
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crack (0.4.3)
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@ -689,6 +690,7 @@ DEPENDENCIES
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chewy (~> 5.1)
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cld3 (~> 3.3.0)
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climate_control (~> 0.2)
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color_diff (~> 0.1)
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concurrent-ruby
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connection_pool
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devise (~> 4.7)
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@ -353,7 +353,9 @@ class Status extends ImmutablePureComponent {
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src={attachment.get('url')}
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alt={attachment.get('description')}
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poster={attachment.get('preview_url') || status.getIn(['account', 'avatar_static'])}
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blurhash={attachment.get('blurhash')}
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backgroundColor={attachment.getIn(['meta', 'colors', 'background'])}
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foregroundColor={attachment.getIn(['meta', 'colors', 'foreground'])}
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accentColor={attachment.getIn(['meta', 'colors', 'accent'])}
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duration={attachment.getIn(['meta', 'original', 'duration'], 0)}
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width={this.props.cachedMediaWidth}
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height={110}
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@ -5,131 +5,12 @@ import { formatTime } from 'mastodon/features/video';
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import Icon from 'mastodon/components/icon';
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import classNames from 'classnames';
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import { throttle } from 'lodash';
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import { encode, decode } from 'blurhash';
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import { getPointerPosition, fileNameFromURL } from 'mastodon/features/video';
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import { debounce } from 'lodash';
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const digitCharacters = [
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'0',
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'1',
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'2',
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'3',
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'4',
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'5',
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'6',
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'7',
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'8',
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'9',
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'A',
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'B',
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'C',
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'D',
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'E',
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'F',
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'G',
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'H',
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'I',
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'J',
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'K',
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'L',
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'M',
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'N',
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'O',
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'P',
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'Q',
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'R',
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'S',
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'T',
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'U',
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'V',
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'W',
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'X',
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'Y',
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'Z',
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'a',
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'b',
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'c',
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'd',
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'e',
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'f',
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'g',
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'h',
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'i',
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'j',
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'k',
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'l',
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'm',
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'n',
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'o',
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'p',
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'q',
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'r',
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's',
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't',
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'u',
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'v',
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'w',
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'x',
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'y',
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'z',
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'#',
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'$',
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'%',
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'*',
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'+',
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',',
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'-',
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'.',
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':',
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';',
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'=',
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'?',
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'@',
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'[',
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']',
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'^',
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'_',
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'{',
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'|',
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'}',
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'~',
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];
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const decode83 = (str) => {
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let value = 0;
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let c, digit;
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for (let i = 0; i < str.length; i++) {
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c = str[i];
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digit = digitCharacters.indexOf(c);
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value = value * 83 + digit;
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}
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return value;
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};
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const decodeRGB = int => ({
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r: Math.max(0, (int >> 16)),
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g: Math.max(0, (int >> 8) & 255),
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b: Math.max(0, (int & 255)),
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});
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const luma = ({ r, g, b }) => 0.2126 * r + 0.7152 * g + 0.0722 * b;
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const adjustColor = ({ r, g, b }, lumaThreshold = 100) => {
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let delta;
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if (luma({ r, g, b }) >= lumaThreshold) {
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delta = -80;
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} else {
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delta = 80;
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}
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return {
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r: r + delta,
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g: g + delta,
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b: b + delta,
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};
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const hex2rgba = (hex, alpha = 1) => {
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const [r, g, b] = hex.match(/\w\w/g).map(x => parseInt(x, 16));
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return `rgba(${r}, ${g}, ${b}, ${alpha})`;
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};
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const messages = defineMessages({
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@ -157,7 +38,9 @@ class Audio extends React.PureComponent {
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fullscreen: PropTypes.bool,
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intl: PropTypes.object.isRequired,
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cacheWidth: PropTypes.func,
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blurhash: PropTypes.string,
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backgroundColor: PropTypes.string,
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foregroundColor: PropTypes.string,
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accentColor: PropTypes.string,
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};
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state = {
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@ -169,7 +52,6 @@ class Audio extends React.PureComponent {
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muted: false,
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volume: 0.5,
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dragging: false,
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color: { r: 255, g: 255, b: 255 },
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};
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setPlayerRef = c => {
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@ -207,10 +89,6 @@ class Audio extends React.PureComponent {
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}
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}
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setBlurhashCanvasRef = c => {
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this.blurhashCanvas = c;
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}
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setCanvasRef = c => {
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this.canvas = c;
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@ -222,41 +100,13 @@ class Audio extends React.PureComponent {
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componentDidMount () {
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window.addEventListener('scroll', this.handleScroll);
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window.addEventListener('resize', this.handleResize, { passive: true });
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if (!this.props.blurhash) {
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const img = new Image();
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img.crossOrigin = 'anonymous';
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img.onload = () => this.handlePosterLoad(img);
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img.src = this.props.poster;
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} else {
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this._setColorScheme();
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this._decodeBlurhash();
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}
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}
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componentDidUpdate (prevProps, prevState) {
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if (prevProps.poster !== this.props.poster && !this.props.blurhash) {
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const img = new Image();
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img.crossOrigin = 'anonymous';
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img.onload = () => this.handlePosterLoad(img);
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img.src = this.props.poster;
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if (prevProps.src !== this.props.src || this.state.width !== prevState.width || this.state.height !== prevState.height) {
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this._clear();
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this._draw();
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}
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if (prevState.blurhash !== this.state.blurhash || prevProps.blurhash !== this.props.blurhash) {
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this._setColorScheme();
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this._decodeBlurhash();
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}
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this._clear();
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this._draw();
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}
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_decodeBlurhash () {
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const context = this.blurhashCanvas.getContext('2d');
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const pixels = decode(this.props.blurhash || this.state.blurhash, 32, 32);
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const outputImageData = new ImageData(pixels, 32, 32);
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context.putImageData(outputImageData, 0, 0);
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}
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componentWillUnmount () {
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@ -425,31 +275,6 @@ class Audio extends React.PureComponent {
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this.analyser = analyser;
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}
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handlePosterLoad = image => {
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const canvas = document.createElement('canvas');
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const context = canvas.getContext('2d');
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canvas.width = image.width;
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canvas.height = image.height;
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context.drawImage(image, 0, 0);
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const inputImageData = context.getImageData(0, 0, image.width, image.height);
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const blurhash = encode(inputImageData.data, image.width, image.height, 4, 4);
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this.setState({ blurhash });
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}
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_setColorScheme () {
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const blurhash = this.props.blurhash || this.state.blurhash;
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const averageColor = decodeRGB(decode83(blurhash.slice(2, 6)));
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this.setState({
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color: adjustColor(averageColor),
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darkText: luma(averageColor) >= 165,
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});
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}
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handleDownload = () => {
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fetch(this.props.src).then(res => res.blob()).then(blob => {
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const element = document.createElement('a');
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@ -609,8 +434,8 @@ class Audio extends React.PureComponent {
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const gradient = this.canvasContext.createLinearGradient(dx1, dy1, dx2, dy2);
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const mainColor = `rgb(${this.state.color.r}, ${this.state.color.g}, ${this.state.color.b})`;
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const lastColor = `rgba(${this.state.color.r}, ${this.state.color.g}, ${this.state.color.b}, 0)`;
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const mainColor = this._getAccentColor();
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const lastColor = hex2rgba(mainColor, 0);
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gradient.addColorStop(0, mainColor);
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gradient.addColorStop(0.6, mainColor);
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@ -632,17 +457,25 @@ class Audio extends React.PureComponent {
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return Math.floor(this._getRadius() + (PADDING * this._getScaleCoefficient()));
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}
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_getColor () {
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return `rgb(${this.state.color.r}, ${this.state.color.g}, ${this.state.color.b})`;
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_getAccentColor () {
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return this.props.accentColor || '#ffffff';
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}
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_getBackgroundColor () {
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return this.props.backgroundColor || '#000000';
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}
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_getForegroundColor () {
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return this.props.foregroundColor || '#ffffff';
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}
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render () {
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const { src, intl, alt, editable } = this.props;
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const { paused, muted, volume, currentTime, duration, buffer, darkText, dragging } = this.state;
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const { paused, muted, volume, currentTime, duration, buffer, dragging } = this.state;
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const progress = (currentTime / duration) * 100;
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return (
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<div className={classNames('audio-player', { editable, 'with-light-background': darkText })} ref={this.setPlayerRef} style={{ width: '100%', height: this.props.fullscreen ? '100%' : (this.state.height || this.props.height) }} onMouseEnter={this.handleMouseEnter} onMouseLeave={this.handleMouseLeave}>
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<div className={classNames('audio-player', { editable })} ref={this.setPlayerRef} style={{ backgroundColor: this._getBackgroundColor(), color: this._getForegroundColor(), width: '100%', height: this.props.fullscreen ? '100%' : (this.state.height || this.props.height) }} onMouseEnter={this.handleMouseEnter} onMouseLeave={this.handleMouseLeave}>
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<audio
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src={src}
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ref={this.setAudioRef}
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@ -654,24 +487,15 @@ class Audio extends React.PureComponent {
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/>
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<canvas
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className='audio-player__background'
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onClick={this.togglePlay}
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width='32'
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height='32'
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style={{ width: this.state.width, height: this.state.height, position: 'absolute', top: 0, left: 0 }}
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ref={this.setBlurhashCanvasRef}
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aria-label={alt}
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title={alt}
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role='button'
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tabIndex='0'
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/>
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<canvas
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className='audio-player__canvas'
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width={this.state.width}
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height={this.state.height}
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style={{ width: '100%', position: 'absolute', top: 0, left: 0, pointerEvents: 'none' }}
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style={{ width: '100%', position: 'absolute', top: 0, left: 0 }}
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ref={this.setCanvasRef}
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onClick={this.togglePlay}
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title={alt}
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aria-label={alt}
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/>
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<img
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@ -684,12 +508,12 @@ class Audio extends React.PureComponent {
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<div className='video-player__seek' onMouseDown={this.handleMouseDown} ref={this.setSeekRef}>
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<div className='video-player__seek__buffer' style={{ width: `${buffer}%` }} />
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<div className='video-player__seek__progress' style={{ width: `${progress}%`, backgroundColor: this._getColor() }} />
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<div className='video-player__seek__progress' style={{ width: `${progress}%`, backgroundColor: this._getAccentColor() }} />
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<span
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className={classNames('video-player__seek__handle', { active: dragging })}
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tabIndex='0'
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style={{ left: `${progress}%`, backgroundColor: this._getColor() }}
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style={{ left: `${progress}%`, backgroundColor: this._getAccentColor() }}
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/>
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</div>
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@ -700,12 +524,12 @@ class Audio extends React.PureComponent {
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<button type='button' title={intl.formatMessage(muted ? messages.unmute : messages.mute)} aria-label={intl.formatMessage(muted ? messages.unmute : messages.mute)} onClick={this.toggleMute}><Icon id={muted ? 'volume-off' : 'volume-up'} fixedWidth /></button>
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<div className={classNames('video-player__volume', { active: this.state.hovered })} ref={this.setVolumeRef} onMouseDown={this.handleVolumeMouseDown}>
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<div className='video-player__volume__current' style={{ width: `${volume * 100}%`, backgroundColor: this._getColor() }} />
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<div className='video-player__volume__current' style={{ width: `${volume * 100}%`, backgroundColor: this._getAccentColor() }} />
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<span
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className={classNames('video-player__volume__handle')}
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tabIndex='0'
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style={{ left: `${volume * 100}%`, backgroundColor: this._getColor() }}
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style={{ left: `${volume * 100}%`, backgroundColor: this._getAccentColor() }}
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/>
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</div>
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@ -126,7 +126,9 @@ class DetailedStatus extends ImmutablePureComponent {
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alt={attachment.get('description')}
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duration={attachment.getIn(['meta', 'original', 'duration'], 0)}
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poster={attachment.get('preview_url') || status.getIn(['account', 'avatar_static'])}
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blurhash={attachment.get('blurhash')}
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backgroundColor={attachment.getIn(['meta', 'colors', 'background'])}
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foregroundColor={attachment.getIn(['meta', 'colors', 'foreground'])}
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accentColor={attachment.getIn(['meta', 'colors', 'accent'])}
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height={150}
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/>
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);
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@ -61,7 +61,9 @@ export default class AudioModal extends ImmutablePureComponent {
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duration={media.getIn(['meta', 'original', 'duration'], 0)}
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height={150}
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poster={media.get('preview_url') || status.getIn(['account', 'avatar_static'])}
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blurhash={media.get('blurhash')}
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backgroundColor={media.getIn(['meta', 'colors', 'background'])}
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foregroundColor={media.getIn(['meta', 'colors', 'foreground'])}
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accentColor={media.getIn(['meta', 'colors', 'accent'])}
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/>
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</div>
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|
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@ -329,7 +329,9 @@ class FocalPointModal extends ImmutablePureComponent {
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duration={media.getIn(['meta', 'original', 'duration'], 0)}
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height={150}
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poster={media.get('preview_url') || account.get('avatar_static')}
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blurhash={media.get('blurhash')}
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backgroundColor={media.getIn(['meta', 'colors', 'background'])}
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foregroundColor={media.getIn(['meta', 'colors', 'foreground'])}
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accentColor={media.getIn(['meta', 'colors', 'accent'])}
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editable
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/>
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)}
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|
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@ -5314,36 +5314,31 @@ a.status-card.compact:hover {
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.video-player__volume::before,
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.video-player__seek::before {
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background: rgba($white, 0.15);
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background: currentColor;
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opacity: 0.15;
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}
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&.with-light-background {
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color: $black;
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.video-player__seek__buffer {
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background: currentColor;
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opacity: 0.2;
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}
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.video-player__volume::before,
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.video-player__seek::before {
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background: rgba($black, 0.15);
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.video-player__buttons button {
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color: currentColor;
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opacity: 0.75;
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&:active,
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&:hover,
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&:focus {
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color: currentColor;
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opacity: 1;
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}
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}
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.video-player__seek__buffer {
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background: rgba($black, 0.2);
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}
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.video-player__buttons button {
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color: rgba($black, 0.75);
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&:active,
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&:hover,
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&:focus {
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color: $black;
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}
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}
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.video-player__time-sep,
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.video-player__time-total,
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.video-player__time-current {
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color: $black;
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}
|
||||
.video-player__time-sep,
|
||||
.video-player__time-total,
|
||||
.video-player__time-current {
|
||||
color: currentColor;
|
||||
}
|
||||
|
||||
.video-player__seek::before,
|
||||
|
|
|
|||
|
|
@ -40,6 +40,13 @@ class MediaAttachment < ApplicationRecord
|
|||
VIDEO_FILE_EXTENSIONS = %w(.webm .mp4 .m4v .mov).freeze
|
||||
AUDIO_FILE_EXTENSIONS = %w(.ogg .oga .mp3 .wav .flac .opus .aac .m4a .3gp .wma).freeze
|
||||
|
||||
META_KEYS = %i(
|
||||
focus
|
||||
colors
|
||||
original
|
||||
small
|
||||
).freeze
|
||||
|
||||
IMAGE_MIME_TYPES = %w(image/jpeg image/png image/gif).freeze
|
||||
VIDEO_MIME_TYPES = %w(video/webm video/mp4 video/quicktime video/ogg).freeze
|
||||
VIDEO_CONVERTIBLE_MIME_TYPES = %w(video/webm video/quicktime).freeze
|
||||
|
|
@ -165,7 +172,7 @@ class MediaAttachment < ApplicationRecord
|
|||
|
||||
has_attached_file :thumbnail,
|
||||
styles: THUMBNAIL_STYLES,
|
||||
processors: [:lazy_thumbnail, :blurhash_transcoder],
|
||||
processors: [:lazy_thumbnail, :blurhash_transcoder, :color_extractor],
|
||||
convert_options: GLOBAL_CONVERT_OPTIONS
|
||||
|
||||
validates_attachment_content_type :thumbnail, content_type: IMAGE_MIME_TYPES
|
||||
|
|
@ -216,7 +223,7 @@ class MediaAttachment < ApplicationRecord
|
|||
|
||||
x, y = (point.is_a?(Enumerable) ? point : point.split(',')).map(&:to_f)
|
||||
|
||||
meta = (file.instance_read(:meta) || {}).with_indifferent_access.slice(:focus, :original, :small)
|
||||
meta = (file.instance_read(:meta) || {}).with_indifferent_access.slice(*META_KEYS)
|
||||
meta['focus'] = { 'x' => x, 'y' => y }
|
||||
|
||||
file.instance_write(:meta, meta)
|
||||
|
|
@ -338,7 +345,7 @@ class MediaAttachment < ApplicationRecord
|
|||
end
|
||||
|
||||
def populate_meta
|
||||
meta = (file.instance_read(:meta) || {}).with_indifferent_access.slice(:focus, :original, :small)
|
||||
meta = (file.instance_read(:meta) || {}).with_indifferent_access.slice(*META_KEYS)
|
||||
|
||||
file.queued_for_write.each do |style, file|
|
||||
meta[style] = style == :small || image? ? image_geometry(file) : video_metadata(file)
|
||||
|
|
|
|||
|
|
@ -11,6 +11,6 @@
|
|||
%video{ autoplay: 'autoplay', muted: 'muted', loop: 'loop' }
|
||||
%source{ src: @media_attachment.file.url(:original) }
|
||||
- elsif @media_attachment.audio?
|
||||
= react_component :audio, src: @media_attachment.file.url(:original), poster: full_asset_url(@media_attachment.account.avatar_static_url), width: 670, height: 380, fullscreen: true, alt: @media_attachment.description, duration: @media_attachment.file.meta.dig(:original, :duration) do
|
||||
= react_component :audio, src: @media_attachment.file.url(:original), poster: @media_attachment.thumbnail.present? ? @media_attachment.thumbnail.url : @media_attachment.account.avatar_static_url, backgroundColor: @media_attachment.file.meta.dig('colors', 'background'), foregroundColor: @media_attachment.file.meta.dig('colors', 'foreground'), accentColor: @media_attachment.file.meta.dig('colors', 'accent'), width: 670, height: 380, fullscreen: true, alt: @media_attachment.description, duration: @media_attachment.file.meta.dig(:original, :duration) do
|
||||
%audio{ controls: 'controls' }
|
||||
%source{ src: @media_attachment.file.url(:original) }
|
||||
|
|
|
|||
|
|
@ -33,7 +33,7 @@
|
|||
= render partial: 'statuses/attachment_list', locals: { attachments: status.media_attachments }
|
||||
- elsif status.media_attachments.first.audio?
|
||||
- audio = status.media_attachments.first
|
||||
= react_component :audio, src: audio.file.url(:original), poster: audio.thumbnail.present? ? audio.thumbnail.url : status.account.avatar_static_url, blurhash: audio.blurhash, width: 670, height: 380, alt: audio.description, duration: audio.file.meta.dig('original', 'duration') do
|
||||
= react_component :audio, src: audio.file.url(:original), poster: audio.thumbnail.present? ? audio.thumbnail.url : status.account.avatar_static_url, backgroundColor: audio.file.meta.dig('colors', 'background'), foregroundColor: audio.file.meta.dig('colors', 'foreground'), accentColor: audio.file.meta.dig('colors', 'accent'), width: 670, height: 380, alt: audio.description, duration: audio.file.meta.dig('original', 'duration') do
|
||||
= render partial: 'statuses/attachment_list', locals: { attachments: status.media_attachments }
|
||||
- else
|
||||
= react_component :media_gallery, height: 380, sensitive: status.sensitive?, standalone: true, autoplay: autoplay, media: status.media_attachments.map { |a| ActiveModelSerializers::SerializableResource.new(a, serializer: REST::MediaAttachmentSerializer).as_json } do
|
||||
|
|
|
|||
|
|
@ -39,7 +39,7 @@
|
|||
= render partial: 'statuses/attachment_list', locals: { attachments: status.media_attachments }
|
||||
- elsif status.media_attachments.first.audio?
|
||||
- audio = status.media_attachments.first
|
||||
= react_component :audio, src: audio.file.url(:original), poster: audio.thumbnail.present? ? audio.thumbnail.url : status.account.avatar_static_url, blurhash: audio.blurhash, width: 610, height: 343, alt: audio.description, duration: audio.file.meta.dig('original', 'duration') do
|
||||
= react_component :audio, src: audio.file.url(:original), poster: audio.thumbnail.present? ? audio.thumbnail.url : status.account.avatar_static_url, backgroundColor: audio.file.meta.dig('colors', 'background'), foregroundColor: audio.file.meta.dig('colors', 'foreground'), accentColor: audio.file.meta.dig('colors', 'accent'), width: 610, height: 343, alt: audio.description, duration: audio.file.meta.dig('original', 'duration') do
|
||||
= render partial: 'statuses/attachment_list', locals: { attachments: status.media_attachments }
|
||||
- else
|
||||
= react_component :media_gallery, height: 343, sensitive: status.sensitive?, autoplay: autoplay, media: status.media_attachments.map { |a| ActiveModelSerializers::SerializableResource.new(a, serializer: REST::MediaAttachmentSerializer).as_json } do
|
||||
|
|
|
|||
|
|
@ -32,7 +32,7 @@ class PostProcessMediaWorker
|
|||
|
||||
media_attachment.file.reprocess!(:original)
|
||||
media_attachment.processing = :complete
|
||||
media_attachment.file_meta = previous_meta.merge(media_attachment.file_meta).with_indifferent_access.slice(:focus, :original, :small)
|
||||
media_attachment.file_meta = previous_meta.merge(media_attachment.file_meta).with_indifferent_access.slice(*MediaAttachment::META_KEYS)
|
||||
media_attachment.save
|
||||
rescue ActiveRecord::RecordNotFound
|
||||
true
|
||||
|
|
|
|||
|
|
@ -11,6 +11,7 @@ require_relative '../lib/redis/namespace_extensions'
|
|||
require_relative '../lib/paperclip/url_generator_extensions'
|
||||
require_relative '../lib/paperclip/attachment_extensions'
|
||||
require_relative '../lib/paperclip/media_type_spoof_detector_extensions'
|
||||
require_relative '../lib/paperclip/transcoder_extensions'
|
||||
require_relative '../lib/paperclip/lazy_thumbnail'
|
||||
require_relative '../lib/paperclip/gif_transcoder'
|
||||
require_relative '../lib/paperclip/video_transcoder'
|
||||
|
|
|
|||
189
lib/paperclip/color_extractor.rb
Normal file
189
lib/paperclip/color_extractor.rb
Normal file
|
|
@ -0,0 +1,189 @@
|
|||
# frozen_string_literal: true
|
||||
|
||||
require 'mime/types/columnar'
|
||||
|
||||
module Paperclip
|
||||
class ColorExtractor < Paperclip::Processor
|
||||
MIN_CONTRAST = 3.0
|
||||
FREQUENCY_THRESHOLD = 0.01
|
||||
|
||||
def make
|
||||
depth = 8
|
||||
|
||||
# Determine background palette by getting colors close to the image's edge only
|
||||
background_palette = palette_from_histogram(convert(':source -alpha set -gravity Center -region 75%x75% -fill None -colorize 100% -alpha transparent +region -format %c -colors :quantity -depth :depth histogram:info:', source: File.expand_path(@file.path), quantity: 10, depth: depth), 10)
|
||||
|
||||
# Determine foreground palette from the whole image
|
||||
foreground_palette = palette_from_histogram(convert(':source -format %c -colors :quantity -depth :depth histogram:info:', source: File.expand_path(@file.path), quantity: 10, depth: depth), 10)
|
||||
|
||||
background_color = background_palette.first || foreground_palette.first
|
||||
foreground_colors = []
|
||||
|
||||
return @file if background_color.nil?
|
||||
|
||||
max_distance = 0
|
||||
max_distance_color = nil
|
||||
|
||||
foreground_palette.each do |color|
|
||||
distance = ColorDiff.between(background_color, color)
|
||||
|
||||
if distance > max_distance
|
||||
max_distance = distance
|
||||
max_distance_color = color
|
||||
end
|
||||
end
|
||||
|
||||
foreground_colors << max_distance_color unless max_distance_color.nil?
|
||||
|
||||
max_distance = 0
|
||||
max_distance_color = nil
|
||||
|
||||
foreground_palette.each do |color|
|
||||
distance = ColorDiff.between(background_color, color)
|
||||
contrast = w3c_contrast(background_color, color)
|
||||
|
||||
if distance > max_distance && contrast >= MIN_CONTRAST && !foreground_colors.include?(color)
|
||||
max_distance = distance
|
||||
max_distance_color = color
|
||||
end
|
||||
end
|
||||
|
||||
foreground_colors << max_distance_color unless max_distance_color.nil?
|
||||
|
||||
# If we don't have enough colors for accent and foreground, generate
|
||||
# new ones by manipulating the background color
|
||||
(2 - foreground_colors.size).times do |i|
|
||||
foreground_colors << lighten_or_darken(background_color, 35 + (15 * i))
|
||||
end
|
||||
|
||||
# We want the color with the highest contrast to background to be the foreground one,
|
||||
# and the one with the highest saturation to be the accent one
|
||||
foreground_color = foreground_colors.max_by { |rgb| w3c_contrast(background_color, rgb) }
|
||||
accent_color = foreground_colors.max_by { |rgb| rgb_to_hsl(rgb.r, rgb.g, rgb.b)[1] }
|
||||
|
||||
meta = {
|
||||
colors: {
|
||||
background: rgb_to_hex(background_color),
|
||||
foreground: rgb_to_hex(foreground_color),
|
||||
accent: rgb_to_hex(accent_color),
|
||||
},
|
||||
}
|
||||
|
||||
attachment.instance.file.instance_write(:meta, (attachment.instance.file.instance_read(:meta) || {}).merge(meta))
|
||||
|
||||
@file
|
||||
end
|
||||
|
||||
private
|
||||
|
||||
def w3c_contrast(color1, color2)
|
||||
luminance1 = (0.2126 * color1.r + 0.7152 * color1.g + 0.0722 * color1.b) + 0.05
|
||||
luminance2 = (0.2126 * color2.r + 0.7152 * color2.g + 0.0722 * color2.b) + 0.05
|
||||
|
||||
if luminance1 > luminance2
|
||||
luminance1 / luminance2
|
||||
else
|
||||
luminance2 / luminance1
|
||||
end
|
||||
end
|
||||
|
||||
# rubocop:disable Style/MethodParameterName
|
||||
def rgb_to_hsl(r, g, b)
|
||||
r /= 255.0
|
||||
g /= 255.0
|
||||
b /= 255.0
|
||||
max = [r, g, b].max
|
||||
min = [r, g, b].min
|
||||
h = (max + min) / 2.0
|
||||
s = (max + min) / 2.0
|
||||
l = (max + min) / 2.0
|
||||
|
||||
if max == min
|
||||
h = 0
|
||||
s = 0 # achromatic
|
||||
else
|
||||
d = max - min
|
||||
s = l >= 0.5 ? d / (2.0 - max - min) : d / (max + min)
|
||||
|
||||
case max
|
||||
when r
|
||||
h = (g - b) / d + (g < b ? 6.0 : 0)
|
||||
when g
|
||||
h = (b - r) / d + 2.0
|
||||
when b
|
||||
h = (r - g) / d + 4.0
|
||||
end
|
||||
|
||||
h /= 6.0
|
||||
end
|
||||
|
||||
[(h * 360).round, (s * 100).round, (l * 100).round]
|
||||
end
|
||||
|
||||
def hue_to_rgb(p, q, t)
|
||||
t += 1 if t.negative?
|
||||
t -= 1 if t > 1
|
||||
|
||||
return (p + (q - p) * 6 * t) if t < 1 / 6.0
|
||||
return q if t < 1 / 2.0
|
||||
return (p + (q - p) * (2 / 3.0 - t) * 6) if t < 2 / 3.0
|
||||
|
||||
p
|
||||
end
|
||||
|
||||
def hsl_to_rgb(h, s, l)
|
||||
h /= 360.0
|
||||
s /= 100.0
|
||||
l /= 100.0
|
||||
|
||||
r = 0.0
|
||||
g = 0.0
|
||||
b = 0.0
|
||||
|
||||
if s == 0.0
|
||||
r = l.to_f
|
||||
g = l.to_f
|
||||
b = l.to_f # achromatic
|
||||
else
|
||||
q = l < 0.5 ? l * (1 + s) : l + s - l * s
|
||||
p = 2 * l - q
|
||||
r = hue_to_rgb(p, q, h + 1 / 3.0)
|
||||
g = hue_to_rgb(p, q, h)
|
||||
b = hue_to_rgb(p, q, h - 1 / 3.0)
|
||||
end
|
||||
|
||||
[(r * 255).round, (g * 255).round, (b * 255).round]
|
||||
end
|
||||
# rubocop:enable Style/MethodParameterName
|
||||
|
||||
def lighten_or_darken(color, by)
|
||||
hue, saturation, light = rgb_to_hsl(color.r, color.g, color.b)
|
||||
|
||||
light = begin
|
||||
if light < 50
|
||||
[100, light + by].min
|
||||
else
|
||||
[0, light - by].max
|
||||
end
|
||||
end
|
||||
|
||||
ColorDiff::Color::RGB.new(*hsl_to_rgb(hue, saturation, light))
|
||||
end
|
||||
|
||||
def palette_from_histogram(result, quantity)
|
||||
frequencies = result.scan(/([0-9]+)\:/).flatten.map(&:to_f)
|
||||
hex_values = result.scan(/\#([0-9A-Fa-f]{6,8})/).flatten
|
||||
total_frequencies = frequencies.reduce(&:+).to_f
|
||||
|
||||
frequencies.map.with_index { |f, i| [f / total_frequencies, hex_values[i]] }
|
||||
.sort_by { |r| -r[0] }
|
||||
.reject { |r| r[1].size == 8 && r[1].end_with?('00') }
|
||||
.map { |r| ColorDiff::Color::RGB.new(*r[1][0..5].scan(/../).map { |c| c.to_i(16) }) }
|
||||
.slice(0, quantity)
|
||||
end
|
||||
|
||||
def rgb_to_hex(rgb)
|
||||
'#%02x%02x%02x' % [rgb.r, rgb.g, rgb.b]
|
||||
end
|
||||
end
|
||||
end
|
||||
14
lib/paperclip/transcoder_extensions.rb
Normal file
14
lib/paperclip/transcoder_extensions.rb
Normal file
|
|
@ -0,0 +1,14 @@
|
|||
# frozen_string_literal: true
|
||||
|
||||
module Paperclip
|
||||
module TranscoderExtensions
|
||||
# Prevent the transcoder from modifying our meta hash
|
||||
def initialize(file, options = {}, attachment = nil)
|
||||
meta_value = attachment&.instance_read(:meta)
|
||||
super
|
||||
attachment&.instance_write(:meta, meta_value)
|
||||
end
|
||||
end
|
||||
end
|
||||
|
||||
Paperclip::Transcoder.prepend(Paperclip::TranscoderExtensions)
|
||||
Loading…
Reference in a new issue