feat: Add VitePress docs, EPUB to PDF tool, Phosphor icons, and licensing updates
- Set up VitePress documentation site (docs:dev, docs:build, docs:preview) - Added Getting Started, Tools Reference, Contributing, and Commercial License pages - Created self-hosting guides for Docker, Vercel, Netlify, Cloudflare, AWS, Hostinger, Nginx, Apache - Updated README with documentation link, sponsors section, and docs contribution guide - Added EPUB to PDF converter using LibreOffice WASM - Migrated to Phosphor Icons for consistent iconography - Added donation ribbon banner on landing page - Removed 'Like My Work?' section (replaced by ribbon) - Updated licensing.html with delivery model, AGPL notice, invoicing, and no-refund policy - Added Commercial License documentation page - Updated translations table (Chinese added, marked non-English as In Progress) - Added sponsors.yml workflow for auto-generating sponsor avatars
This commit is contained in:
abdullahalam123
210
src/js/utils/ghostscript-loader.ts
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210
src/js/utils/ghostscript-loader.ts
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/**
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* PDF/A Conversion using Ghostscript WASM
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*
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* Converts PDFs to PDF/A-1b, PDF/A-2b, or PDF/A-3b format.
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*/
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import loadWASM from '@bentopdf/gs-wasm';
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interface GhostscriptModule {
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FS: {
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writeFile(path: string, data: Uint8Array | string): void;
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readFile(path: string, opts?: { encoding?: string }): Uint8Array;
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unlink(path: string): void;
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stat(path: string): { size: number };
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};
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callMain(args: string[]): number;
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}
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export type PdfALevel = 'PDF/A-1b' | 'PDF/A-2b' | 'PDF/A-3b';
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let cachedGsModule: GhostscriptModule | null = null;
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export function setCachedGsModule(module: GhostscriptModule): void {
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cachedGsModule = module;
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}
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export function getCachedGsModule(): GhostscriptModule | null {
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return cachedGsModule;
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}
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/**
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* Encode binary data to Adobe ASCII85 (Base85) format.
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* This matches Python's base64.a85encode(data, adobe=True)
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*/
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function encodeBase85(data: Uint8Array): string {
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const POW85 = [85 * 85 * 85 * 85, 85 * 85 * 85, 85 * 85, 85, 1];
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let result = '';
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// Process 4 bytes at a time
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for (let i = 0; i < data.length; i += 4) {
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// Get 4 bytes (pad with zeros if needed)
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let value = 0;
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const remaining = Math.min(4, data.length - i);
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for (let j = 0; j < 4; j++) {
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value = value * 256 + (j < remaining ? data[i + j] : 0);
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}
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// Special case: all zeros become 'z'
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if (value === 0 && remaining === 4) {
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result += 'z';
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} else {
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// Encode to 5 ASCII85 characters
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const encoded: string[] = [];
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for (let j = 0; j < 5; j++) {
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encoded.push(String.fromCharCode((value / POW85[j]) % 85 + 33));
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}
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// For partial blocks, only output needed characters
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result += encoded.slice(0, remaining + 1).join('');
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}
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}
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return result;
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}
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export async function convertToPdfA(
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pdfData: Uint8Array,
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level: PdfALevel = 'PDF/A-2b',
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onProgress?: (msg: string) => void
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): Promise<Uint8Array> {
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onProgress?.('Loading Ghostscript...');
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let gs: GhostscriptModule;
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if (cachedGsModule) {
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gs = cachedGsModule;
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} else {
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gs = await loadWASM({
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locateFile: (path: string) => {
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if (path.endsWith('.wasm')) {
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return import.meta.env.BASE_URL + 'ghostscript-wasm/gs.wasm';
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}
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return path;
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},
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print: (text: string) => console.log('[GS]', text),
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printErr: (text: string) => console.error('[GS Error]', text),
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}) as GhostscriptModule;
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cachedGsModule = gs;
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}
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const pdfaMap: Record<PdfALevel, string> = {
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'PDF/A-1b': '1',
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'PDF/A-2b': '2',
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'PDF/A-3b': '3',
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};
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const inputPath = '/tmp/input.pdf';
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const outputPath = '/tmp/output.pdf';
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gs.FS.writeFile(inputPath, pdfData);
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console.log('[Ghostscript] Input file size:', pdfData.length);
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onProgress?.(`Converting to ${level}...`);
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const pdfaDefPath = '/tmp/pdfa.ps';
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try {
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const response = await fetch(import.meta.env.BASE_URL + 'ghostscript-wasm/sRGB_v4_ICC_preference.icc');
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if (!response.ok) throw new Error(`HTTP error! Status: ${response.status}`);
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const iccData = new Uint8Array(await response.arrayBuffer());
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console.log('[Ghostscript] sRGB v4 ICC profile loaded:', iccData.length, 'bytes');
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// Write ICC profile as a binary file to FS (eliminates encoding issues)
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const iccPath = '/tmp/pdfa.icc';
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gs.FS.writeFile(iccPath, iccData);
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console.log('[Ghostscript] sRGB ICC profile written to FS:', iccPath);
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// Generate PostScript with reference to ICC file (Standard OCRmyPDF/GS approach)
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const pdfaPS = `%!
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% Define OutputIntent subtype based on PDF/A level
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/OutputIntentSubtype ${level === 'PDF/A-1b' ? '/GTS_PDFA1' : '/GTS_PDFA'} def
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[/_objdef {icc_PDFA} /type /stream /OBJ pdfmark
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[{icc_PDFA} <</N 3 >> /PUT pdfmark
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[{icc_PDFA} (${iccPath}) (r) file /PUT pdfmark
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[/_objdef {OutputIntent_PDFA} /type /dict /OBJ pdfmark
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[{OutputIntent_PDFA} <<
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/Type /OutputIntent
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/S OutputIntentSubtype
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/DestOutputProfile {icc_PDFA}
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/OutputConditionIdentifier (sRGB)
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>> /PUT pdfmark
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[{Catalog} <<
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/OutputIntents [ {OutputIntent_PDFA} ]
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>> /PUT pdfmark
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`;
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gs.FS.writeFile(pdfaDefPath, pdfaPS);
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console.log('[Ghostscript] PDFA PostScript created with embedded ICC profile');
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} catch (e) {
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console.error('[Ghostscript] Failed to create PDFA PostScript:', e);
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throw new Error('Conversion failed: could not create PDF/A definition');
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}
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const args = [
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'-dBATCH',
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'-dNOPAUSE',
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'-sDEVICE=pdfwrite',
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`-dPDFA=${pdfaMap[level]}`,
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'-dPDFACompatibilityPolicy=1',
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`-dCompatibilityLevel=${level === 'PDF/A-1b' ? '1.4' : '1.7'}`,
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'-sColorConversionStrategy=RGB',
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'-dEmbedAllFonts=true',
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'-dSubsetFonts=true',
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'-dAutoRotatePages=/None',
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`-sOutputFile=${outputPath}`,
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pdfaDefPath,
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inputPath,
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];
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console.log('[Ghostscript] Running PDF/A conversion...');
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let exitCode: number;
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try {
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exitCode = gs.callMain(args);
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} catch (e) {
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console.error('[Ghostscript] Exception:', e);
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throw new Error(`Ghostscript threw an exception: ${e}`);
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}
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console.log('[Ghostscript] Exit code:', exitCode);
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if (exitCode !== 0) {
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try { gs.FS.unlink(inputPath); } catch { /* ignore */ }
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try { gs.FS.unlink(outputPath); } catch { /* ignore */ }
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throw new Error(`Ghostscript conversion failed with exit code ${exitCode}`);
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}
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// Read output
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let output: Uint8Array;
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try {
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const stat = gs.FS.stat(outputPath);
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console.log('[Ghostscript] Output file size:', stat.size);
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output = gs.FS.readFile(outputPath);
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} catch (e) {
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console.error('[Ghostscript] Failed to read output:', e);
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throw new Error('Ghostscript did not produce output file');
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}
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// Cleanup
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try { gs.FS.unlink(inputPath); } catch { /* ignore */ }
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try { gs.FS.unlink(outputPath); } catch { /* ignore */ }
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return output;
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}
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export async function convertFileToPdfA(
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file: File,
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level: PdfALevel = 'PDF/A-2b',
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onProgress?: (msg: string) => void
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): Promise<Blob> {
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const arrayBuffer = await file.arrayBuffer();
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const pdfData = new Uint8Array(arrayBuffer);
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const result = await convertToPdfA(pdfData, level, onProgress);
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// Copy to regular ArrayBuffer to avoid SharedArrayBuffer issues
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const copy = new Uint8Array(result.length);
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copy.set(result);
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return new Blob([copy], { type: 'application/pdf' });
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}
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