70 lines
1.4 KiB
TypeScript
70 lines
1.4 KiB
TypeScript
import { Buffer } from "buffer";
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import _, {floor} from "lodash";
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const statics: any = {
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'ESC': '1B',
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'FF': '0C'
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}
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const mmToInch = 0.0393701;
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// 26x51 label, or 1" x 2"
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const pageSize = getPageLengthParameters(2);
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const command = `
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ESC i a 00h
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ESC @
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ESC i L 01h
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ESC ( C 02h 00h ${pageSize.mL} ${pageSize.mH}
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ESC $ CBh 00h
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ESC ( V 02h 00h CBh 00h
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ESC k 0Bh
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ESC X 00h 64h 00h
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At your side
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FF
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`;
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console.warn('output: ', parseEscToHex(command))
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function inchToDots(value: number, dpi = 203) {
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const dots = value * dpi;
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const margin = 6 * mmToInch * dpi;
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return Math.round(dots - margin);
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}
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function toHex(value: number) {
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return value.toString(16).padStart(2, '0') + 'h';
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}
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function getPageLengthParameters(widthInInches: number) {
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const dots = inchToDots(widthInInches);
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const mH = Math.floor(dots / 265);
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const mL = dots - mH * 265;
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return {
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mH: toHex(mH), mL: toHex(mL)
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}
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}
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function parseEscToHex(text: string): string {
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return text.trim().split(/\s+/)
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.map(chunk => {
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if (_.has(statics, chunk)) {
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// Found static mapping
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return statics[chunk]
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}
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if(chunk.length == 3 && chunk.endsWith('h')) {
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// parse as hex
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return chunk.slice(0, -1)
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}
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return Buffer.from(chunk).toString('hex')
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})
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.join(' ')
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} |