File size: 1,652 Bytes
f56a29b | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 | // Convert SVG to base64 image. Reference: https://github.com/scriptex/svg64
const characters = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';
const PREFIX = 'data:image/svg+xml;base64,';
const utf8Encode = (string: string) => {
string = string.replace(/\r\n/g, '\n');
let utftext = '';
for (let n = 0; n < string.length; n++) {
const c = string.charCodeAt(n);
if (c < 128) {
utftext += String.fromCharCode(c);
} else if (c > 127 && c < 2048) {
utftext += String.fromCharCode((c >> 6) | 192);
utftext += String.fromCharCode((c & 63) | 128);
} else {
utftext += String.fromCharCode((c >> 12) | 224);
utftext += String.fromCharCode(((c >> 6) & 63) | 128);
utftext += String.fromCharCode((c & 63) | 128);
}
}
return utftext;
};
const encode = (input: string) => {
let output = '';
let chr1, chr2, chr3, enc1, enc2, enc3, enc4;
let i = 0;
input = utf8Encode(input);
while (i < input.length) {
chr1 = input.charCodeAt(i++);
chr2 = input.charCodeAt(i++);
chr3 = input.charCodeAt(i++);
enc1 = chr1 >> 2;
enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
enc4 = chr3 & 63;
if (isNaN(chr2)) enc3 = enc4 = 64;
else if (isNaN(chr3)) enc4 = 64;
output =
output +
characters.charAt(enc1) +
characters.charAt(enc2) +
characters.charAt(enc3) +
characters.charAt(enc4);
}
return output;
};
export const svg2Base64 = (element: Element) => {
const XMLS = new XMLSerializer();
const svg = XMLS.serializeToString(element);
return PREFIX + encode(svg);
};
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