diff --git a/src/converters/imageToPdf.js b/src/converters/imageToPdf.js new file mode 100644 index 0000000..9ea3d1c --- /dev/null +++ b/src/converters/imageToPdf.js @@ -0,0 +1,31 @@ +import fs from 'node:fs/promises'; +import sharp from 'sharp'; +import { PDFDocument } from 'pdf-lib'; +import { register } from './registry.js'; + +const IMAGE_FORMATS = ['jpg', 'jpeg', 'png', 'webp', 'gif', 'tiff', 'avif']; + +async function convert(inputPath, outputPath) { + const pngBuffer = await sharp(inputPath).png().toBuffer(); + const metadata = await sharp(pngBuffer).metadata(); + + const pdfDoc = await PDFDocument.create(); + const page = pdfDoc.addPage([metadata.width, metadata.height]); + const embeddedImage = await pdfDoc.embedPng(pngBuffer); + + page.drawImage(embeddedImage, { + x: 0, + y: 0, + width: metadata.width, + height: metadata.height, + }); + + const pdfBytes = await pdfDoc.save(); + await fs.writeFile(outputPath, pdfBytes); +} + +export function registerImageToPdfConverter() { + for (const sourceFormat of IMAGE_FORMATS) { + register({ family: 'image', sourceFormat, targetFormat: 'pdf', convert }); + } +} diff --git a/test/converters/imageToPdf.test.js b/test/converters/imageToPdf.test.js new file mode 100644 index 0000000..17bf3b1 --- /dev/null +++ b/test/converters/imageToPdf.test.js @@ -0,0 +1,36 @@ +import { describe, it, expect, beforeAll, afterAll } from 'vitest'; +import fs from 'node:fs/promises'; +import path from 'node:path'; +import os from 'node:os'; +import { registerImageToPdfConverter } from '../../src/converters/imageToPdf.js'; +import { resolve, listTargetFormats } from '../../src/converters/registry.js'; +import { detectInputMime } from '../../src/mime.js'; + +let tmpDir; + +beforeAll(async () => { + registerImageToPdfConverter(); + tmpDir = await fs.mkdtemp(path.join(os.tmpdir(), 'converter-image-to-pdf-')); +}); + +afterAll(async () => { + await fs.rm(tmpDir, { recursive: true, force: true }); +}); + +describe('image to PDF converter', () => { + it('registers pdf as a target for every image format', () => { + expect(listTargetFormats('png')).toContain('pdf'); + expect(listTargetFormats('jpg')).toContain('pdf'); + }); + + it('converts a PNG fixture into a valid PDF', async () => { + const inputPath = path.join(import.meta.dirname, '..', 'fixtures', 'sample.png'); + const outputPath = path.join(tmpDir, 'output.pdf'); + const entry = resolve('png', 'pdf'); + + await entry.convert(inputPath, outputPath); + + const detected = await detectInputMime(outputPath); + expect(detected.mime).toBe('application/pdf'); + }); +});