fix: handle multi-channel TIFF formats and add compression options
Add PDF quality selector (high/medium/low) with JPEG compression.
This commit is contained in:
alam00000
@@ -1,200 +1,239 @@
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import { showLoader, hideLoader, showAlert } from '../ui.js';
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import { downloadFile, formatBytes, readFileAsArrayBuffer } from '../utils/helpers.js';
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import {
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downloadFile,
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formatBytes,
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readFileAsArrayBuffer,
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} from '../utils/helpers.js';
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import { createIcons, icons } from 'lucide';
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import { PDFDocument as PDFLibDocument } from 'pdf-lib';
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import { decode } from 'tiff';
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import { tiffIfdToRgba } from '../utils/tiff-utils.js';
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let files: File[] = [];
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const updateUI = () => {
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const fileDisplayArea = document.getElementById('file-display-area');
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const fileControls = document.getElementById('file-controls');
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const processBtn = document.getElementById('process-btn');
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const fileDisplayArea = document.getElementById('file-display-area');
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const fileControls = document.getElementById('file-controls');
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const processBtn = document.getElementById('process-btn');
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if (!fileDisplayArea || !fileControls || !processBtn) return;
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const optionsPanel = document.getElementById('tiff-options');
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fileDisplayArea.innerHTML = '';
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if (!fileDisplayArea || !fileControls || !processBtn) return;
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if (files.length > 0) {
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fileControls.classList.remove('hidden');
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processBtn.classList.remove('hidden');
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fileDisplayArea.innerHTML = '';
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files.forEach((file, index) => {
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const fileDiv = document.createElement('div');
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fileDiv.className = 'flex items-center justify-between bg-gray-700 p-3 rounded-lg text-sm';
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if (files.length > 0) {
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fileControls.classList.remove('hidden');
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processBtn.classList.remove('hidden');
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optionsPanel?.classList.remove('hidden');
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const infoContainer = document.createElement('div');
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infoContainer.className = 'flex items-center gap-2 overflow-hidden';
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files.forEach((file, index) => {
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const fileDiv = document.createElement('div');
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fileDiv.className =
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'flex items-center justify-between bg-gray-700 p-3 rounded-lg text-sm';
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const nameSpan = document.createElement('span');
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nameSpan.className = 'truncate font-medium text-gray-200';
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nameSpan.textContent = file.name;
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const infoContainer = document.createElement('div');
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infoContainer.className = 'flex items-center gap-2 overflow-hidden';
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const sizeSpan = document.createElement('span');
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sizeSpan.className = 'flex-shrink-0 text-gray-400 text-xs';
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sizeSpan.textContent = `(${formatBytes(file.size)})`;
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const nameSpan = document.createElement('span');
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nameSpan.className = 'truncate font-medium text-gray-200';
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nameSpan.textContent = file.name;
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infoContainer.append(nameSpan, sizeSpan);
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const sizeSpan = document.createElement('span');
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sizeSpan.className = 'flex-shrink-0 text-gray-400 text-xs';
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sizeSpan.textContent = `(${formatBytes(file.size)})`;
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const removeBtn = document.createElement('button');
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removeBtn.className = 'ml-4 text-red-400 hover:text-red-300 flex-shrink-0';
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removeBtn.innerHTML = '<i data-lucide="trash-2" class="w-4 h-4"></i>';
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removeBtn.onclick = () => {
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files = files.filter((_, i) => i !== index);
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updateUI();
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};
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infoContainer.append(nameSpan, sizeSpan);
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fileDiv.append(infoContainer, removeBtn);
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fileDisplayArea.appendChild(fileDiv);
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});
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createIcons({ icons });
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} else {
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fileControls.classList.add('hidden');
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processBtn.classList.add('hidden');
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}
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const removeBtn = document.createElement('button');
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removeBtn.className =
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'ml-4 text-red-400 hover:text-red-300 flex-shrink-0';
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removeBtn.innerHTML = '<i data-lucide="trash-2" class="w-4 h-4"></i>';
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removeBtn.onclick = () => {
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files = files.filter((_, i) => i !== index);
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updateUI();
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};
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fileDiv.append(infoContainer, removeBtn);
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fileDisplayArea.appendChild(fileDiv);
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});
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createIcons({ icons });
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} else {
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fileControls.classList.add('hidden');
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processBtn.classList.add('hidden');
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optionsPanel?.classList.add('hidden');
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}
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};
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const resetState = () => {
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files = [];
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updateUI();
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files = [];
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updateUI();
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};
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async function convert() {
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if (files.length === 0) {
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showAlert('No Files', 'Please select at least one TIFF file.');
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return;
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}
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showLoader('Converting TIFF to PDF...');
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try {
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const pdfDoc = await PDFLibDocument.create();
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for (const file of files) {
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const tiffBytes = await readFileAsArrayBuffer(file);
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const ifds = decode(tiffBytes as ArrayBuffer);
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if (files.length === 0) {
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showAlert('No Files', 'Please select at least one TIFF file.');
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return;
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}
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const qualitySelect = document.getElementById(
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'tiff-pdf-quality'
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) as HTMLSelectElement;
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const quality = qualitySelect?.value || 'medium';
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const jpegQualityMap: Record<string, number> = {
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high: 0.92,
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medium: 0.75,
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low: 0.5,
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};
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const useJpeg = quality !== 'high';
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const jpegQuality = jpegQualityMap[quality] || 0.75;
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for (const ifd of ifds) {
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const width = ifd.width;
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const height = ifd.height;
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const rgba = ifd.data;
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showLoader('Converting TIFF to PDF...');
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try {
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const pdfDoc = await PDFLibDocument.create();
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for (const file of files) {
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const tiffBytes = await readFileAsArrayBuffer(file);
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const ifds = decode(tiffBytes as ArrayBuffer);
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const canvas = document.createElement('canvas');
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canvas.width = width;
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canvas.height = height;
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const ctx = canvas.getContext('2d');
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if (!ctx) continue;
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for (const ifd of ifds) {
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const width = ifd.width;
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const height = ifd.height;
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const imageData = ctx.createImageData(width, height);
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for (let i = 0; i < rgba.length; i++) {
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imageData.data[i] = rgba[i];
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}
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ctx.putImageData(imageData, 0, 0);
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const canvas = document.createElement('canvas');
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canvas.width = width;
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canvas.height = height;
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const ctx = canvas.getContext('2d');
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if (!ctx) continue;
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const pngBlob = await new Promise<Blob | null>((res) =>
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canvas.toBlob(res, 'image/png')
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);
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if (!pngBlob) continue;
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const pngBytes = await pngBlob.arrayBuffer();
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const pngImage = await pdfDoc.embedPng(pngBytes);
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const page = pdfDoc.addPage([pngImage.width, pngImage.height]);
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page.drawImage(pngImage, {
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x: 0,
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y: 0,
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width: pngImage.width,
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height: pngImage.height,
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});
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}
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}
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const pdfBytes = await pdfDoc.save();
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downloadFile(
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new Blob([new Uint8Array(pdfBytes)], { type: 'application/pdf' }),
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'from_tiff.pdf'
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const rgba = tiffIfdToRgba(
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ifd.data,
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width,
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height,
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ifd.samplesPerPixel || 1,
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ifd.type
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);
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showAlert('Success', 'PDF created successfully!', 'success', () => {
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resetState();
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const imageData = ctx.createImageData(width, height);
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imageData.data.set(rgba);
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ctx.putImageData(imageData, 0, 0);
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const blob = await new Promise<Blob | null>((res) =>
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canvas.toBlob(
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res,
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useJpeg ? 'image/jpeg' : 'image/png',
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useJpeg ? jpegQuality : undefined
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)
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);
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if (!blob) continue;
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canvas.width = 0;
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canvas.height = 0;
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const imgBytes = await blob.arrayBuffer();
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const image = useJpeg
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? await pdfDoc.embedJpg(imgBytes)
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: await pdfDoc.embedPng(imgBytes);
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const page = pdfDoc.addPage([image.width, image.height]);
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page.drawImage(image, {
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x: 0,
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y: 0,
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width: image.width,
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height: image.height,
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});
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} catch (e) {
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console.error(e);
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showAlert(
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'Error',
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'Failed to convert TIFF to PDF. One of the files may be invalid.'
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);
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} finally {
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hideLoader();
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}
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}
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const pdfBytes = await pdfDoc.save();
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downloadFile(
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new Blob([new Uint8Array(pdfBytes)], { type: 'application/pdf' }),
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'from_tiff.pdf'
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);
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showAlert('Success', 'PDF created successfully!', 'success', () => {
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resetState();
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});
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} catch (e) {
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console.error(e);
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showAlert(
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'Error',
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'Failed to convert TIFF to PDF. One of the files may be invalid.'
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);
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} finally {
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hideLoader();
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}
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}
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document.addEventListener('DOMContentLoaded', () => {
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const fileInput = document.getElementById('file-input') as HTMLInputElement;
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const dropZone = document.getElementById('drop-zone');
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const addMoreBtn = document.getElementById('add-more-btn');
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const clearFilesBtn = document.getElementById('clear-files-btn');
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const processBtn = document.getElementById('process-btn');
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const backBtn = document.getElementById('back-to-tools');
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const fileInput = document.getElementById('file-input') as HTMLInputElement;
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const dropZone = document.getElementById('drop-zone');
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const addMoreBtn = document.getElementById('add-more-btn');
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const clearFilesBtn = document.getElementById('clear-files-btn');
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const processBtn = document.getElementById('process-btn');
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const backBtn = document.getElementById('back-to-tools');
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if (backBtn) {
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backBtn.addEventListener('click', () => {
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window.location.href = import.meta.env.BASE_URL;
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});
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if (backBtn) {
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backBtn.addEventListener('click', () => {
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window.location.href = import.meta.env.BASE_URL;
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});
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}
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const handleFileSelect = (newFiles: FileList | null) => {
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if (!newFiles || newFiles.length === 0) return;
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const validFiles = Array.from(newFiles).filter(
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(file) =>
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file.type === 'image/tiff' ||
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file.name.toLowerCase().endsWith('.tiff') ||
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file.name.toLowerCase().endsWith('.tif')
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);
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if (validFiles.length < newFiles.length) {
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showAlert(
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'Invalid Files',
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'Some files were skipped. Only TIFF files are allowed.'
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);
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}
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const handleFileSelect = (newFiles: FileList | null) => {
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if (!newFiles || newFiles.length === 0) return;
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const validFiles = Array.from(newFiles).filter(
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(file) =>
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file.type === 'image/tiff' ||
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file.name.toLowerCase().endsWith('.tiff') ||
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file.name.toLowerCase().endsWith('.tif')
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);
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if (validFiles.length < newFiles.length) {
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showAlert('Invalid Files', 'Some files were skipped. Only TIFF files are allowed.');
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}
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if (validFiles.length > 0) {
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files = [...files, ...validFiles];
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updateUI();
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}
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};
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if (fileInput && dropZone) {
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fileInput.addEventListener('change', (e) => {
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handleFileSelect((e.target as HTMLInputElement).files);
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});
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dropZone.addEventListener('dragover', (e) => {
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e.preventDefault();
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dropZone.classList.add('bg-gray-700');
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});
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dropZone.addEventListener('dragleave', (e) => {
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e.preventDefault();
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dropZone.classList.remove('bg-gray-700');
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});
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dropZone.addEventListener('drop', (e) => {
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e.preventDefault();
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dropZone.classList.remove('bg-gray-700');
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handleFileSelect(e.dataTransfer?.files ?? null);
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});
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fileInput.addEventListener('click', () => {
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fileInput.value = '';
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});
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if (validFiles.length > 0) {
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files = [...files, ...validFiles];
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updateUI();
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}
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};
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if (addMoreBtn) {
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addMoreBtn.addEventListener('click', () => {
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fileInput?.click();
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});
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}
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if (fileInput && dropZone) {
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fileInput.addEventListener('change', (e) => {
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handleFileSelect((e.target as HTMLInputElement).files);
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});
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if (clearFilesBtn) {
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clearFilesBtn.addEventListener('click', () => {
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resetState();
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});
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}
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dropZone.addEventListener('dragover', (e) => {
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e.preventDefault();
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dropZone.classList.add('bg-gray-700');
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});
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if (processBtn) {
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processBtn.addEventListener('click', convert);
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}
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dropZone.addEventListener('dragleave', (e) => {
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e.preventDefault();
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dropZone.classList.remove('bg-gray-700');
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});
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dropZone.addEventListener('drop', (e) => {
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e.preventDefault();
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dropZone.classList.remove('bg-gray-700');
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handleFileSelect(e.dataTransfer?.files ?? null);
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});
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fileInput.addEventListener('click', () => {
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fileInput.value = '';
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});
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}
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if (addMoreBtn) {
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addMoreBtn.addEventListener('click', () => {
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fileInput?.click();
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});
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}
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if (clearFilesBtn) {
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clearFilesBtn.addEventListener('click', () => {
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resetState();
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});
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}
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if (processBtn) {
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processBtn.addEventListener('click', convert);
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}
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});
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45
src/js/utils/tiff-utils.ts
Normal file
45
src/js/utils/tiff-utils.ts
Normal file
@@ -0,0 +1,45 @@
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type TiffDataArray = Uint8Array | Uint16Array | Float32Array | Float64Array;
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export function tiffIfdToRgba(
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src: TiffDataArray,
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width: number,
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height: number,
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channels: number,
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photometricType: number
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): Uint8ClampedArray {
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const totalPixels = width * height;
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const dst = new Uint8ClampedArray(totalPixels * 4);
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const isWhiteIsZero = photometricType === 0;
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let maxVal = 255;
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if (src instanceof Uint16Array) maxVal = 65535;
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else if (src instanceof Float32Array || src instanceof Float64Array)
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maxVal = 1;
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const norm = (v: number) => {
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if (maxVal === 255) return v;
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if (maxVal === 1) return Math.round(Math.min(1, Math.max(0, v)) * 255);
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return v >> 8;
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};
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for (let p = 0; p < totalPixels; p++) {
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const si = p * channels;
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const di = p * 4;
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if (channels >= 3) {
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dst[di] = norm(src[si]);
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dst[di + 1] = norm(src[si + 1]);
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dst[di + 2] = norm(src[si + 2]);
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dst[di + 3] = channels >= 4 ? norm(src[si + 3]) : 255;
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} else {
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let gray = norm(src[si]);
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if (isWhiteIsZero) gray = 255 - gray;
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dst[di] = gray;
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dst[di + 1] = gray;
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dst[di + 2] = gray;
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dst[di + 3] = channels === 2 ? norm(src[si + 1]) : 255;
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}
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}
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return dst;
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}
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@@ -179,6 +179,27 @@
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<div id="file-display-area" class="mt-4 space-y-2"></div>
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<div id="tiff-options" class="hidden mt-6">
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<div class="mb-4">
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<label
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for="tiff-pdf-quality"
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class="block mb-2 text-sm font-medium text-gray-300"
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>PDF Quality</label
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>
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<select
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id="tiff-pdf-quality"
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class="w-full bg-gray-700 border border-gray-600 text-gray-200 rounded-lg px-3 py-2 focus:ring-2 focus:ring-indigo-500 focus:border-transparent"
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>
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<option value="high">High Quality (Larger file)</option>
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<option value="medium" selected>Medium Quality (Balanced)</option>
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<option value="low">Low Quality (Smaller file)</option>
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</select>
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<p class="mt-1 text-xs text-gray-400">
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Controls image compression when embedding into PDF
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</p>
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</div>
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</div>
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<button id="process-btn" class="hidden btn-gradient w-full mt-6">
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Convert to PDF
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</button>
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246
src/tests/tiff-to-pdf.test.ts
Normal file
246
src/tests/tiff-to-pdf.test.ts
Normal file
@@ -0,0 +1,246 @@
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import { describe, it, expect } from 'vitest';
|
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import { tiffIfdToRgba } from '../js/utils/tiff-utils';
|
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|
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describe('tiffIfdToRgba', () => {
|
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describe('RGB (3 channels)', () => {
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it('converts RGB data to RGBA with full opacity', () => {
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const src = new Uint8Array([255, 0, 0, 0, 255, 0, 0, 0, 255]);
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||||
const result = tiffIfdToRgba(src, 3, 1, 3, 2);
|
||||
expect(Array.from(result)).toEqual([
|
||||
255, 0, 0, 255, 0, 255, 0, 255, 0, 0, 255, 255,
|
||||
]);
|
||||
});
|
||||
|
||||
it('handles a 2x2 RGB image', () => {
|
||||
const src = new Uint8Array([
|
||||
10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120,
|
||||
]);
|
||||
const result = tiffIfdToRgba(src, 2, 2, 3, 2);
|
||||
expect(result.length).toBe(16);
|
||||
expect(result[0]).toBe(10);
|
||||
expect(result[1]).toBe(20);
|
||||
expect(result[2]).toBe(30);
|
||||
expect(result[3]).toBe(255);
|
||||
expect(result[4]).toBe(40);
|
||||
expect(result[5]).toBe(50);
|
||||
expect(result[6]).toBe(60);
|
||||
expect(result[7]).toBe(255);
|
||||
});
|
||||
});
|
||||
|
||||
describe('RGBA (4 channels)', () => {
|
||||
it('copies all 4 channels directly', () => {
|
||||
const src = new Uint8Array([255, 128, 64, 200, 0, 0, 0, 0]);
|
||||
const result = tiffIfdToRgba(src, 2, 1, 4, 2);
|
||||
expect(Array.from(result)).toEqual([255, 128, 64, 200, 0, 0, 0, 0]);
|
||||
});
|
||||
|
||||
it('preserves alpha = 0 (fully transparent)', () => {
|
||||
const src = new Uint8Array([100, 100, 100, 0]);
|
||||
const result = tiffIfdToRgba(src, 1, 1, 4, 2);
|
||||
expect(result[3]).toBe(0);
|
||||
});
|
||||
|
||||
it('preserves alpha = 255 (fully opaque)', () => {
|
||||
const src = new Uint8Array([100, 100, 100, 255]);
|
||||
const result = tiffIfdToRgba(src, 1, 1, 4, 2);
|
||||
expect(result[3]).toBe(255);
|
||||
});
|
||||
});
|
||||
|
||||
describe('Grayscale (1 channel)', () => {
|
||||
it('expands grayscale to RGB with full opacity', () => {
|
||||
const src = new Uint8Array([128]);
|
||||
const result = tiffIfdToRgba(src, 1, 1, 1, 1);
|
||||
expect(Array.from(result)).toEqual([128, 128, 128, 255]);
|
||||
});
|
||||
|
||||
it('handles black pixel', () => {
|
||||
const src = new Uint8Array([0]);
|
||||
const result = tiffIfdToRgba(src, 1, 1, 1, 1);
|
||||
expect(Array.from(result)).toEqual([0, 0, 0, 255]);
|
||||
});
|
||||
|
||||
it('handles white pixel', () => {
|
||||
const src = new Uint8Array([255]);
|
||||
const result = tiffIfdToRgba(src, 1, 1, 1, 1);
|
||||
expect(Array.from(result)).toEqual([255, 255, 255, 255]);
|
||||
});
|
||||
|
||||
it('handles multiple grayscale pixels', () => {
|
||||
const src = new Uint8Array([0, 128, 255]);
|
||||
const result = tiffIfdToRgba(src, 3, 1, 1, 1);
|
||||
expect(result.length).toBe(12);
|
||||
expect(result[0]).toBe(0);
|
||||
expect(result[4]).toBe(128);
|
||||
expect(result[8]).toBe(255);
|
||||
expect(result[3]).toBe(255);
|
||||
expect(result[7]).toBe(255);
|
||||
expect(result[11]).toBe(255);
|
||||
});
|
||||
});
|
||||
|
||||
describe('Grayscale + Alpha (2 channels)', () => {
|
||||
it('expands grayscale and copies alpha', () => {
|
||||
const src = new Uint8Array([200, 100]);
|
||||
const result = tiffIfdToRgba(src, 1, 1, 2, 1);
|
||||
expect(Array.from(result)).toEqual([200, 200, 200, 100]);
|
||||
});
|
||||
|
||||
it('handles fully transparent grayscale', () => {
|
||||
const src = new Uint8Array([255, 0]);
|
||||
const result = tiffIfdToRgba(src, 1, 1, 2, 1);
|
||||
expect(result[3]).toBe(0);
|
||||
});
|
||||
});
|
||||
|
||||
describe('WhiteIsZero (photometric type 0)', () => {
|
||||
it('inverts grayscale values', () => {
|
||||
const src = new Uint8Array([0]);
|
||||
const result = tiffIfdToRgba(src, 1, 1, 1, 0);
|
||||
expect(Array.from(result)).toEqual([255, 255, 255, 255]);
|
||||
});
|
||||
|
||||
it('inverts mid-gray', () => {
|
||||
const src = new Uint8Array([200]);
|
||||
const result = tiffIfdToRgba(src, 1, 1, 1, 0);
|
||||
expect(result[0]).toBe(55);
|
||||
expect(result[1]).toBe(55);
|
||||
expect(result[2]).toBe(55);
|
||||
});
|
||||
|
||||
it('inverts white to black', () => {
|
||||
const src = new Uint8Array([255]);
|
||||
const result = tiffIfdToRgba(src, 1, 1, 1, 0);
|
||||
expect(Array.from(result)).toEqual([0, 0, 0, 255]);
|
||||
});
|
||||
|
||||
it('does not invert alpha in grayscale+alpha', () => {
|
||||
const src = new Uint8Array([0, 128]);
|
||||
const result = tiffIfdToRgba(src, 1, 1, 2, 0);
|
||||
expect(result[0]).toBe(255);
|
||||
expect(result[3]).toBe(128);
|
||||
});
|
||||
|
||||
it('does not affect RGB images', () => {
|
||||
const src = new Uint8Array([100, 150, 200]);
|
||||
const result = tiffIfdToRgba(src, 1, 1, 3, 0);
|
||||
expect(result[0]).toBe(100);
|
||||
expect(result[1]).toBe(150);
|
||||
expect(result[2]).toBe(200);
|
||||
});
|
||||
});
|
||||
|
||||
describe('16-bit images', () => {
|
||||
it('normalizes 16-bit RGB to 8-bit', () => {
|
||||
const src = new Uint16Array([65535, 0, 32768]);
|
||||
const result = tiffIfdToRgba(src, 1, 1, 3, 2);
|
||||
expect(result[0]).toBe(255);
|
||||
expect(result[1]).toBe(0);
|
||||
expect(result[2]).toBe(128);
|
||||
expect(result[3]).toBe(255);
|
||||
});
|
||||
|
||||
it('normalizes 16-bit grayscale to 8-bit', () => {
|
||||
const src = new Uint16Array([65535]);
|
||||
const result = tiffIfdToRgba(src, 1, 1, 1, 1);
|
||||
expect(result[0]).toBe(255);
|
||||
expect(result[1]).toBe(255);
|
||||
expect(result[2]).toBe(255);
|
||||
});
|
||||
|
||||
it('handles 16-bit zero values', () => {
|
||||
const src = new Uint16Array([0, 0, 0]);
|
||||
const result = tiffIfdToRgba(src, 1, 1, 3, 2);
|
||||
expect(result[0]).toBe(0);
|
||||
expect(result[1]).toBe(0);
|
||||
expect(result[2]).toBe(0);
|
||||
});
|
||||
|
||||
it('normalizes 16-bit RGBA including alpha', () => {
|
||||
const src = new Uint16Array([65535, 32768, 0, 49152]);
|
||||
const result = tiffIfdToRgba(src, 1, 1, 4, 2);
|
||||
expect(result[0]).toBe(255);
|
||||
expect(result[1]).toBe(128);
|
||||
expect(result[2]).toBe(0);
|
||||
expect(result[3]).toBe(192);
|
||||
});
|
||||
});
|
||||
|
||||
describe('Float32 images', () => {
|
||||
it('normalizes float RGB (0.0-1.0) to 8-bit', () => {
|
||||
const src = new Float32Array([1.0, 0.0, 0.5]);
|
||||
const result = tiffIfdToRgba(src, 1, 1, 3, 2);
|
||||
expect(result[0]).toBe(255);
|
||||
expect(result[1]).toBe(0);
|
||||
expect(result[2]).toBe(128);
|
||||
expect(result[3]).toBe(255);
|
||||
});
|
||||
|
||||
it('clamps float values above 1.0', () => {
|
||||
const src = new Float32Array([1.5, 0.0, 0.0]);
|
||||
const result = tiffIfdToRgba(src, 1, 1, 3, 2);
|
||||
expect(result[0]).toBe(255);
|
||||
});
|
||||
|
||||
it('clamps float values below 0.0', () => {
|
||||
const src = new Float32Array([-0.5, 0.0, 0.0]);
|
||||
const result = tiffIfdToRgba(src, 1, 1, 3, 2);
|
||||
expect(result[0]).toBe(0);
|
||||
});
|
||||
|
||||
it('normalizes float grayscale', () => {
|
||||
const src = new Float32Array([0.5]);
|
||||
const result = tiffIfdToRgba(src, 1, 1, 1, 1);
|
||||
expect(result[0]).toBe(128);
|
||||
expect(result[1]).toBe(128);
|
||||
expect(result[2]).toBe(128);
|
||||
});
|
||||
});
|
||||
|
||||
describe('Float64 images', () => {
|
||||
it('normalizes float64 RGB to 8-bit', () => {
|
||||
const src = new Float64Array([1.0, 0.5, 0.0]);
|
||||
const result = tiffIfdToRgba(src, 1, 1, 3, 2);
|
||||
expect(result[0]).toBe(255);
|
||||
expect(result[1]).toBe(128);
|
||||
expect(result[2]).toBe(0);
|
||||
});
|
||||
});
|
||||
|
||||
describe('output buffer size', () => {
|
||||
it('always outputs width * height * 4 bytes', () => {
|
||||
const src1 = new Uint8Array([100, 200, 50]);
|
||||
expect(tiffIfdToRgba(src1, 1, 1, 3, 2).length).toBe(4);
|
||||
|
||||
const src2 = new Uint8Array([100]);
|
||||
expect(tiffIfdToRgba(src2, 1, 1, 1, 1).length).toBe(4);
|
||||
|
||||
const src3 = new Uint8Array(new Array(12).fill(128));
|
||||
expect(tiffIfdToRgba(src3, 2, 2, 3, 2).length).toBe(16);
|
||||
});
|
||||
|
||||
it('returns Uint8ClampedArray', () => {
|
||||
const src = new Uint8Array([0, 0, 0]);
|
||||
const result = tiffIfdToRgba(src, 1, 1, 3, 2);
|
||||
expect(result).toBeInstanceOf(Uint8ClampedArray);
|
||||
});
|
||||
});
|
||||
|
||||
describe('edge cases', () => {
|
||||
it('handles 1x1 pixel image', () => {
|
||||
const src = new Uint8Array([42, 84, 126]);
|
||||
const result = tiffIfdToRgba(src, 1, 1, 3, 2);
|
||||
expect(Array.from(result)).toEqual([42, 84, 126, 255]);
|
||||
});
|
||||
|
||||
it('handles 5+ channel images (uses first 4)', () => {
|
||||
const src = new Uint8Array([10, 20, 30, 40, 99]);
|
||||
const result = tiffIfdToRgba(src, 1, 1, 5, 2);
|
||||
expect(result[0]).toBe(10);
|
||||
expect(result[1]).toBe(20);
|
||||
expect(result[2]).toBe(30);
|
||||
expect(result[3]).toBe(40);
|
||||
});
|
||||
});
|
||||
});
|
||||
Reference in New Issue
Block a user