forked from sheetjs/sheetjs
87 lines
3.2 KiB
JavaScript
87 lines
3.2 KiB
JavaScript
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function hex2RGB(h) {
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var o = h.substr(h[0]==="#"?1:0,6);
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var R = o.substr(0,2);
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var G = o.substr(2,2);
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var B = o.substr(4,2);
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return [parseInt(R,16),parseInt(G,16),parseInt(B,16)];
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}
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function rgb2Hex(rgb) {
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for(var i=0,o=1; i!=3; ++i) o = o*256 + (rgb[i]>255?255:rgb[i]<0?0:rgb[i]);
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return o.toString(16).toUpperCase().substr(1);
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}
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function rgb2HSL(rgb) {
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var R = rgb[0]/255, G = rgb[1]/255, B=rgb[2]/255;
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var M = Math.max(R, G, B), m = Math.min(R, G, B), C = M - m;
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if(C === 0) return [0, 0, R];
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var H6 = 0, S = 0, L2 = (M + m);
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S = C / (L2 > 1 ? 2 - L2 : L2);
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switch(M){
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case R: H6 = ((G - B) / C + 6)%6; break;
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case G: H6 = ((B - R) / C + 2); break;
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case B: H6 = ((R - G) / C + 4); break;
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}
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return [H6 / 6, S, L2 / 2];
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}
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function hsl2RGB(hsl){
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var H = hsl[0], S = hsl[1], L = hsl[2];
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var C = S * 2 * (L < 0.5 ? L : 1 - L), m = L - C/2;
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var rgb = [m,m,m], h6 = 6*H;
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var X;
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if(S !== 0) switch(h6|0) {
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case 0: case 6: X = C * h6; rgb[0] += C; rgb[1] += X; break;
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case 1: X = C * (2 - h6); rgb[0] += X; rgb[1] += C; break;
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case 2: X = C * (h6 - 2); rgb[1] += C; rgb[2] += X; break;
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case 3: X = C * (4 - h6); rgb[1] += X; rgb[2] += C; break;
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case 4: X = C * (h6 - 4); rgb[2] += C; rgb[0] += X; break;
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case 5: X = C * (6 - h6); rgb[2] += X; rgb[0] += C; break;
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}
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for(var i = 0; i != 3; ++i) rgb[i] = Math.round(rgb[i]*255);
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return rgb;
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}
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/* 18.8.3 bgColor tint algorithm */
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function rgb_tint(hex, tint) {
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if(tint === 0) return hex;
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var hsl = rgb2HSL(hex2RGB(hex));
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if (tint < 0) hsl[2] = hsl[2] * (1 + tint);
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else hsl[2] = 1 - (1 - hsl[2]) * (1 - tint);
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return rgb2Hex(hsl2RGB(hsl));
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}
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var exp = [
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{ patternType: 'darkHorizontal',
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fgColor: { theme: 9, "tint":-0.249977111117893, rgb: 'F79646' },
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bgColor: { theme: 5, "tint":0.3999755851924192, rgb: 'C0504D' } },
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{ patternType: 'darkUp',
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fgColor: { theme: 3, "tint":-0.249977111117893, rgb: 'EEECE1' },
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bgColor: { theme: 7, "tint":0.3999755851924192, rgb: '8064A2' } },
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{ patternType: 'darkGray',
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fgColor: { theme: 3, rgb: 'EEECE1' },
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bgColor: { theme: 1, rgb: 'FFFFFF' } },
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{ patternType: 'lightGray',
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fgColor: { theme: 6, "tint":0.3999755851924192, rgb: '9BBB59' },
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bgColor: { theme: 2, "tint":-0.499984740745262, rgb: '1F497D' } },
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{ patternType: 'lightDown',
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fgColor: { theme: 4, rgb: '4F81BD' },
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bgColor: { theme: 7, rgb: '8064A2' } },
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{ patternType: 'lightGrid',
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fgColor: { theme: 6, "tint":-0.249977111117893, rgb: '9BBB59' },
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bgColor: { theme: 9, "tint":-0.249977111117893, rgb: 'F79646' } },
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{ patternType: 'lightGrid',
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fgColor: { theme: 4, rgb: '4F81BD' },
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bgColor: { theme: 2, "tint":-0.749992370372631, rgb: '1F497D' } },
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{ patternType: 'lightVertical',
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fgColor: { theme: 3, "tint":0.3999755851924192, rgb: 'EEECE1' },
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bgColor: { theme: 7, "tint":0.3999755851924192, rgb: '8064A2' } }
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];
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var map = [];
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exp.forEach(function(e) {
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e.fgColor.new = rgb_tint( e.fgColor.rgb, e.fgColor.tint || 0);
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console.log(e.fgColor.rgb, e.fgColor.new);
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e.bgColor.new = rgb_tint( e.bgColor.rgb, e.bgColor.tint || 0);
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console.log(e.bgColor.rgb, e.bgColor.new);
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});
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