Please enter a valid non-negative number for Points.

'; downloadPdfButton.style.display = 'none'; return; } if (isNaN(dpi) || dpi <= 0) { resultArea.style.display = 'block'; resultArea.innerHTML = '

Please enter a valid positive number for DPI.

'; downloadPdfButton.style.display = 'none'; return; } // Perform conversion const pixels = (points / POINTS_PER_INCH) * dpi; // Display results resultArea.style.display = 'block'; resultArea.innerHTML = `

Conversion Result:

Original Value: ${points.toFixed(2)} pt

At ${dpi} DPI: ${pixels.toFixed(2)} px

`; downloadPdfButton.style.display = 'block'; // Show PDF button // Store calculated data for PDF generation resultArea.dataset.pointsValue = points.toFixed(2); resultArea.dataset.dpiValue = dpi.toFixed(2); resultArea.dataset.pixelsValue = pixels.toFixed(2); } /** * Clears all inputs and results. */ function clearAll() { const pointsInput = document.getElementById('pointsInput'); const dpiInput = document.getElementById('dpiInput'); const resultArea = document.getElementById('resultArea'); const downloadPdfButton = document.getElementById('downloadPdfButton'); if (pointsInput) { pointsInput.value = ''; } if (dpiInput) { dpiInput.value = '96'; // Reset to default DPI } if (resultArea) { resultArea.style.display = 'none'; resultArea.innerHTML = ''; // Clear stored data for PDF delete resultArea.dataset.pointsValue; delete resultArea.dataset.dpiValue; delete resultArea.dataset.pixelsValue; } if (downloadPdfButton) { downloadPdfButton.style.display = 'none'; } } /** * Generates a PDF report of the Points to Pixels conversion. */ function generatePdf() { // Check if jsPDF library is loaded if (typeof window.jspdf === 'undefined' || typeof window.jspdf.jsPDF === 'undefined') { console.error('jsPDF library not loaded. Cannot generate PDF.'); const resultArea = document.getElementById('resultArea'); if (resultArea) { resultArea.innerHTML = '

PDF generation failed. Library not loaded.

'; } return; } const { jsPDF } = window.jspdf; const doc = new jsPDF(); const resultArea = document.getElementById('resultArea'); // Retrieve stored data for PDF const pointsValue = resultArea.dataset.pointsValue || 'N/A'; const dpiValue = resultArea.dataset.dpiValue || 'N/A'; const pixelsValue = resultArea.dataset.pixelsValue || 'N/A'; const generationDate = new Date().toLocaleString(); let yOffset = 20; // Title doc.setFontSize(24); doc.setTextColor(44, 62, 80); doc.text("Points to Pixels Conversion Report", 105, yOffset, { align: 'center' }); yOffset += 20; // Conversion Details doc.setFontSize(16); doc.setTextColor(51, 51, 51); doc.text(`Input Points: ${pointsValue} pt`, 20, yOffset); yOffset += 10; doc.text(`Input DPI: ${dpiValue}`, 20, yOffset); yOffset += 10; doc.text(`Converted Pixels: ${pixelsValue} px`, 20, yOffset); yOffset += 20; // Formula Explanation doc.setFontSize(12); doc.setTextColor(80, 80, 80); doc.text("Formula Used:", 20, yOffset); yOffset += 10; doc.setFont('courier'); // Monospace for formula doc.text("pixels = (points / 72) * DPI", 25, yOffset); doc.setFont('helvetica'); // Reset font yOffset += 15; doc.text("Explanation:", 20, yOffset); yOffset += 7; const explanationText = "A 'point' (pt) is a unit of length commonly used in typography, where 1 inch is exactly 72 points. 'Pixels' (px) are the smallest physical unit of a digital image. The conversion between points and pixels is dependent on the 'Dots Per Inch' (DPI), which specifies the resolution of the display or output device. A higher DPI means more pixels per inch, resulting in a physically smaller display of the same number of points."; const splitExplanation = doc.splitTextToSize(explanationText, 170); doc.text(splitExplanation, 25, yOffset); yOffset += (splitExplanation.length * 7) + 20; // Example Table doc.setFontSize(12); doc.text("Examples at Common DPI Settings:", 20, yOffset); yOffset += 10; const exampleData = [ ["Points (pt)", "DPI", "Pixels (px)"], ["12", "72", ((12 / 72) * 72).toFixed(2)], ["12", "96", ((12 / 72) * 96).toFixed(2)], ["12", "150", ((12 / 72) * 150).toFixed(2)], ["16", "96", ((16 / 72) * 96).toFixed(2)], ["24", "72", ((24 / 72) * 72).toFixed(2)] ]; doc.autoTable({ startY: yOffset, head: [exampleData[0]], body: exampleData.slice(1), theme: 'grid', styles: { fontSize: 10, cellPadding: 2, fillColor: [255, 255, 255] }, headStyles: { fillColor: [209, 236, 241], textColor: [12, 84, 96], fontStyle: 'bold' }, alternateRowStyles: { fillColor: [242, 242, 242] }, columnStyles: { 0: { halign: 'center' }, 1: { halign: 'center' }, 2: { halign: 'center' } }, margin: { left: 20, right: 20 }, didDrawPage: function(data) { // Footer for each page doc.setFontSize(9); doc.setTextColor(150, 150, 150); doc.text(`Report Generated: ${generationDate}`, 20, doc.internal.pageSize.height - 15); doc.text("Points to Pixels Converter Tool", doc.internal.pageSize.width - 20, doc.internal.pageSize.height - 15, { align: 'right' }); } }); doc.save("Points_to_Pixels_Conversion_Report.pdf"); }