80 lines
2.3 KiB
TypeScript
80 lines
2.3 KiB
TypeScript
import { ClassicPreset } from 'rete';
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import { BaseWorkflowNode } from './base-node';
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import { pdfSocket } from '../sockets';
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import type { SocketData } from '../types';
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import { requirePdfInput, processBatch } from '../types';
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import { PDFDocument } from 'pdf-lib';
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import { loadPyMuPDF } from '../../utils/pymupdf-loader.js';
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export class RasterizeNode extends BaseWorkflowNode {
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readonly category = 'Optimize & Repair' as const;
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readonly icon = 'ph-image';
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readonly description = 'Convert to image-based PDF';
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constructor() {
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super('Rasterize');
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this.addInput('pdf', new ClassicPreset.Input(pdfSocket, 'PDF'));
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this.addOutput(
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'pdf',
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new ClassicPreset.Output(pdfSocket, 'Rasterized PDF')
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);
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this.addControl(
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'rasterizeDpi',
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new ClassicPreset.InputControl('text', { initial: '150' })
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);
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this.addControl(
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'imageFormat',
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new ClassicPreset.InputControl('text', { initial: 'png' })
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);
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this.addControl(
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'grayscale',
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new ClassicPreset.InputControl('text', { initial: 'false' })
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);
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}
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async data(
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inputs: Record<string, SocketData[]>
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): Promise<Record<string, SocketData>> {
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const pdfInputs = requirePdfInput(inputs, 'Rasterize');
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const getText = (key: string, fallback: string) => {
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const ctrl = this.controls[key] as
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| ClassicPreset.InputControl<'text'>
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| undefined;
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return ctrl?.value || fallback;
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};
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const dpi = Math.max(
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72,
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Math.min(600, parseInt(getText('rasterizeDpi', '150')) || 150)
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);
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const format = getText('imageFormat', 'png') === 'jpeg' ? 'jpeg' : 'png';
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const grayscale = getText('grayscale', 'false') === 'true';
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return {
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pdf: await processBatch(pdfInputs, async (input) => {
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const pymupdf = await loadPyMuPDF();
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const blob = new Blob([new Uint8Array(input.bytes)], {
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type: 'application/pdf',
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});
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const rasterizedBlob = await pymupdf.rasterizePdf(blob, {
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dpi,
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format,
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grayscale,
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quality: 95,
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});
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const bytes = new Uint8Array(await rasterizedBlob.arrayBuffer());
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const document = await PDFDocument.load(bytes);
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return {
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type: 'pdf',
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document,
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bytes,
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filename: input.filename.replace(/\.pdf$/i, '_rasterized.pdf'),
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};
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}),
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};
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}
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}
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