feat:Setup Prettier for code formatting
This commit is contained in:
NanditaPatil-dotcom
@@ -5,78 +5,91 @@ import { PDFDocument as PDFLibDocument } from 'pdf-lib';
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import { decode } from 'tiff';
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export async function tiffToPdf() {
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if (state.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 state.files) {
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const tiffBytes = await readFileAsArrayBuffer(file);
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const ifds = decode(tiffBytes as any);
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for (const ifd of ifds) {
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const canvas = document.createElement('canvas');
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canvas.width = ifd.width;
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canvas.height = ifd.height;
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const ctx = canvas.getContext('2d');
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if (!ctx) {
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throw new Error('Failed to get canvas context');
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}
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const imageData = ctx.createImageData(ifd.width, ifd.height);
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const pixels = imageData.data;
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// Calculate samples per pixel from data length
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const totalPixels = ifd.width * ifd.height;
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const samplesPerPixel = ifd.data.length / totalPixels;
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// Convert TIFF data to RGBA
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for (let i = 0; i < totalPixels; i++) {
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const dstIndex = i * 4;
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if (samplesPerPixel === 1) {
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// Grayscale
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const gray = ifd.data[i];
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pixels[dstIndex] = gray;
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pixels[dstIndex + 1] = gray;
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pixels[dstIndex + 2] = gray;
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pixels[dstIndex + 3] = 255;
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} else if (samplesPerPixel === 3) {
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// RGB
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const srcIndex = i * 3;
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pixels[dstIndex] = ifd.data[srcIndex];
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pixels[dstIndex + 1] = ifd.data[srcIndex + 1];
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pixels[dstIndex + 2] = ifd.data[srcIndex + 2];
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pixels[dstIndex + 3] = 255;
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} else if (samplesPerPixel === 4) {
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// RGBA
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const srcIndex = i * 4;
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pixels[dstIndex] = ifd.data[srcIndex];
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pixels[dstIndex + 1] = ifd.data[srcIndex + 1];
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pixels[dstIndex + 2] = ifd.data[srcIndex + 2];
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pixels[dstIndex + 3] = ifd.data[srcIndex + 3];
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}
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}
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ctx.putImageData(imageData, 0, 0);
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const pngBlob = await new Promise<Blob>((res) => canvas.toBlob(res!, 'image/png'));
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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, { x: 0, y: 0, width: pngImage.width, height: pngImage.height });
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}
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if (state.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 state.files) {
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const tiffBytes = await readFileAsArrayBuffer(file);
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const ifds = decode(tiffBytes as any);
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for (const ifd of ifds) {
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const canvas = document.createElement('canvas');
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canvas.width = ifd.width;
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canvas.height = ifd.height;
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const ctx = canvas.getContext('2d');
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if (!ctx) {
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throw new Error('Failed to get canvas context');
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}
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const pdfBytes = await pdfDoc.save();
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downloadFile(new Blob([new Uint8Array(pdfBytes)], { type: 'application/pdf' }), 'from_tiff.pdf');
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} catch (e) {
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console.error(e);
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showAlert('Error', 'Failed to convert TIFF to PDF. One of the files may be invalid or corrupted.');
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} finally {
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hideLoader();
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const imageData = ctx.createImageData(ifd.width, ifd.height);
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const pixels = imageData.data;
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// Calculate samples per pixel from data length
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const totalPixels = ifd.width * ifd.height;
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const samplesPerPixel = ifd.data.length / totalPixels;
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// Convert TIFF data to RGBA
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for (let i = 0; i < totalPixels; i++) {
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const dstIndex = i * 4;
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if (samplesPerPixel === 1) {
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// Grayscale
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const gray = ifd.data[i];
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pixels[dstIndex] = gray;
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pixels[dstIndex + 1] = gray;
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pixels[dstIndex + 2] = gray;
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pixels[dstIndex + 3] = 255;
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} else if (samplesPerPixel === 3) {
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// RGB
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const srcIndex = i * 3;
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pixels[dstIndex] = ifd.data[srcIndex];
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pixels[dstIndex + 1] = ifd.data[srcIndex + 1];
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pixels[dstIndex + 2] = ifd.data[srcIndex + 2];
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pixels[dstIndex + 3] = 255;
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} else if (samplesPerPixel === 4) {
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// RGBA
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const srcIndex = i * 4;
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pixels[dstIndex] = ifd.data[srcIndex];
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pixels[dstIndex + 1] = ifd.data[srcIndex + 1];
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pixels[dstIndex + 2] = ifd.data[srcIndex + 2];
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pixels[dstIndex + 3] = ifd.data[srcIndex + 3];
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}
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}
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ctx.putImageData(imageData, 0, 0);
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const pngBlob = await new Promise<Blob>((res) =>
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canvas.toBlob(res!, 'image/png')
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);
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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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}
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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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} 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 or corrupted.'
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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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