331 lines
14 KiB
C#
331 lines
14 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Drawing;
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using System.Drawing.Imaging;
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using System.IO;
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using System.Linq;
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using System.Text;
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namespace BoxPacker3D
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{
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public static class PdfExporter
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{
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private const float PageW = 842f, PageH = 595f, Margin = 36f;
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public static void Export(string path,
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List<BoxSolution> solutions,
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List<Bitmap> overviews,
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List<Bitmap> layerBitmaps,
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List<(double YMin, double YMax)> layers,
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double wallPad, double itemPad,
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List<Item> unpackedItems = null)
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{
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var pages = new List<byte[]>();
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// Layer pages
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foreach (var bmp in layerBitmaps)
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pages.Add(BitmapToJpeg(bmp));
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// Overview pages
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foreach (var bmp in overviews)
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pages.Add(BitmapToJpeg(bmp));
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// Add unpacked items text page if needed
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bool hasUnpackedPage = unpackedItems != null && unpackedItems.Count > 0;
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using (var fs = new FileStream(path, FileMode.Create))
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{
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var w = new PdfWriter(fs);
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w.Raw("%PDF-1.4\n%\xe2\xe3\xcf\xd3\n");
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int n = pages.Count + (hasUnpackedPage ? 1 : 0); // Total pages including text page
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int basePage = 3;
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int baseContent = basePage + n;
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int baseImage = baseContent + n;
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int objFont1 = baseImage + pages.Count; // After image objects
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int objFont2 = objFont1 + 1;
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var offsets = new long[objFont2 + 1];
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// Object 1: Catalog
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offsets[1] = w.Pos;
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w.Obj(1); w.Raw("<< /Type /Catalog /Pages 2 0 R >>\n"); w.EndObj();
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// Object 2: Pages
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var kids = string.Join(" ", Enumerable.Range(basePage, n).Select(i => $"{i} 0 R"));
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offsets[2] = w.Pos;
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w.Obj(2);
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w.Raw($"<< /Type /Pages /Kids [{kids}] /Count {n} >>\n");
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w.EndObj();
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// Per-page objects (image pages)
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for (int i = 0; i < pages.Count; i++)
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{
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bool isLayer = (i < layerBitmaps.Count);
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string pageTitle;
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if (isLayer)
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{
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int layIdx = i;
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pageTitle = $"Vrstva {layIdx + 1} / {layerBitmaps.Count}" +
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(layIdx < layers.Count ? $" (Y: {layers[layIdx].YMin:F1} – {layers[layIdx].YMax:F1} mm)" : "");
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}
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else
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{
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int boxIdx = i - layerBitmaps.Count;
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var sol = solutions[boxIdx];
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pageTitle = $"Škatuľa {boxIdx + 1} / {solutions.Count} " +
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$"({sol.Box.W}×{sol.Box.D}×{sol.Box.H} mm)";
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}
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int imgObj = baseImage + i;
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int contentObj= baseContent + i;
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int pageObj = basePage + i;
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var imgBytes = pages[i];
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int imgW, imgH;
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using (var ms = new MemoryStream(imgBytes))
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using (var bmp = new Bitmap(ms))
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{ imgW = bmp.Width; imgH = bmp.Height; }
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float headerH = 52f, footerH = 22f;
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float availW = PageW - 2 * Margin;
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float availH = PageH - headerH - footerH - Margin;
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float sc = Math.Min(availW / imgW, availH / imgH);
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float scaledW = imgW * sc, scaledH = imgH * sc;
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float imgX = Margin + (availW - scaledW) / 2;
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float imgY = PageH - headerH - scaledH - 4;
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var cs = new StringBuilder();
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// White background
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cs.AppendLine("1 1 1 rg");
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cs.AppendLine($"0 0 {PageW:F2} {PageH:F2} re f");
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// Header bar
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cs.AppendLine("0.06 0.35 0.72 rg");
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cs.AppendLine($"0 {PageH - 44:F2} {PageW:F2} 44 re f");
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// Title
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cs.AppendLine("1 1 1 rg BT /F1 14 Tf");
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cs.AppendLine($"{Margin:F2} {PageH - 30:F2} Td");
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cs.AppendLine($"({EscPdf(pageTitle)}) Tj ET");
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// Date
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cs.AppendLine("0.70 0.80 0.90 rg BT /F2 8 Tf");
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cs.AppendLine($"{PageW - 200:F2} {PageH - 30:F2} Td");
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cs.AppendLine($"(Strana {i + 1} / {n} {DateTime.Now:dd.MM.yyyy}) Tj ET");
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// Box info
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if (isLayer && i < solutions.Count)
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{
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var sol = solutions[0]; // assume first box for layer pages
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cs.AppendLine("0.40 0.40 0.50 rg BT /F2 8 Tf");
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cs.AppendLine($"{Margin:F2} {PageH - 44:F2} Td");
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string infoLine = $"Skatula: {sol.Box.W}×{sol.Box.H}×{sol.Box.D} mm | " +
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$"Stenova izolacia: {wallPad} mm | Medikusova: {itemPad} mm";
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cs.AppendLine($"({EscPdf(infoLine)}) Tj ET");
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}
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// Image
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cs.AppendLine("q");
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cs.AppendLine($"{scaledW:F2} 0 0 {scaledH:F2} {imgX:F2} {imgY:F2} cm");
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cs.AppendLine($"/Im{i} Do Q");
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// Footer
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cs.AppendLine("0.35 0.35 0.45 rg BT /F2 7 Tf");
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cs.AppendLine($"{Margin:F2} 10 Td");
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cs.AppendLine("(Generovane programom 3D Box Packer) Tj ET");
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byte[] csBytes = Encoding.Latin1.GetBytes(cs.ToString());
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// Page
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offsets[pageObj] = w.Pos;
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w.Obj(pageObj);
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w.Raw($"<< /Type /Page /Parent 2 0 R\n");
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w.Raw($" /MediaBox [0 0 {PageW:F2} {PageH:F2}]\n");
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w.Raw($" /Contents {contentObj} 0 R\n");
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w.Raw($" /Resources << /Font << /F1 {objFont1} 0 R /F2 {objFont2} 0 R >>");
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w.Raw($" /XObject << /Im{i} {imgObj} 0 R >> >>\n>>\n");
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w.EndObj();
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// Content
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offsets[contentObj] = w.Pos;
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w.Obj(contentObj);
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w.Raw($"<< /Length {csBytes.Length} >>\nstream\n");
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w.Bytes(csBytes);
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w.Raw("\nendstream\n");
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w.EndObj();
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// Image
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offsets[imgObj] = w.Pos;
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w.Obj(imgObj);
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w.Raw($"<< /Type /XObject /Subtype /Image /Width {imgW} /Height {imgH}");
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w.Raw($" /ColorSpace /DeviceRGB /BitsPerComponent 8 /Filter /DCTDecode");
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w.Raw($" /Length {imgBytes.Length} >>\nstream\n");
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w.Bytes(imgBytes);
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w.Raw("\nendstream\n");
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w.EndObj();
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}
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// Unpacked items text page (if any)
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if (hasUnpackedPage)
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{
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int pageIdx = pages.Count;
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int pageObj = basePage + pageIdx;
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int contentObj = baseContent + pageIdx;
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// Group unpacked items by name
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var grouped = unpackedItems
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.GroupBy(it => it.Name)
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.Select(g => new {
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Name = g.Key,
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Count = g.Count(),
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W = g.First().W,
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H = g.First().H,
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D = g.First().D
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})
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.OrderBy(x => x.Name)
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.ToList();
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var cs = new StringBuilder();
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// White background
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cs.AppendLine("1 1 1 rg");
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cs.AppendLine($"0 0 {PageW:F2} {PageH:F2} re f");
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// Header bar (red for warning)
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cs.AppendLine("0.83 0.18 0.18 rg");
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cs.AppendLine($"0 {PageH - 44:F2} {PageW:F2} 44 re f");
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// Title
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cs.AppendLine("1 1 1 rg BT /F1 14 Tf");
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cs.AppendLine($"{Margin:F2} {PageH - 30:F2} Td");
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cs.AppendLine($"(NEZABALENE KUSY) Tj ET");
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// Date
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cs.AppendLine("1 1 1 rg BT /F2 8 Tf");
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cs.AppendLine($"{PageW - 200:F2} {PageH - 30:F2} Td");
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cs.AppendLine($"(Strana {n} / {n} {DateTime.Now:dd.MM.yyyy}) Tj ET");
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// Summary
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cs.AppendLine("0.20 0.20 0.30 rg BT /F1 11 Tf");
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cs.AppendLine($"{Margin:F2} {PageH - 80:F2} Td");
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cs.AppendLine($"(Nasledujuce kusy sa nezmestili do skatul:) Tj ET");
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// Table header
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float y = PageH - 120;
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cs.AppendLine("0.85 0.85 0.90 rg");
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cs.AppendLine($"{Margin:F2} {y:F2} {PageW - 2*Margin:F2} 20 re f");
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cs.AppendLine("0.25 0.25 0.35 rg BT /F1 9 Tf");
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cs.AppendLine($"{Margin + 10:F2} {y + 6:F2} Td");
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cs.AppendLine("(Nazov) Tj");
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cs.AppendLine($"{250:F2} {0:F2} Td (Rozmery \\(mm\\)) Tj");
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cs.AppendLine($"{160:F2} {0:F2} Td (Pocet) Tj ET");
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y -= 25;
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// Table rows
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int rowNum = 0;
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foreach (var item in grouped)
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{
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if (y < 60) break; // Don't overflow page
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// Alternating row background
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if (rowNum % 2 == 0)
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{
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cs.AppendLine("0.96 0.96 0.98 rg");
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cs.AppendLine($"{Margin:F2} {y:F2} {PageW - 2*Margin:F2} 18 re f");
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}
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cs.AppendLine("0.20 0.20 0.30 rg BT /F2 8 Tf");
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cs.AppendLine($"{Margin + 10:F2} {y + 5:F2} Td");
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cs.AppendLine($"({EscPdf(item.Name)}) Tj");
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cs.AppendLine($"{250:F2} {0:F2} Td ({item.W:F0} x {item.H:F0} x {item.D:F0}) Tj");
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cs.AppendLine($"{160:F2} {0:F2} Td ({item.Count}) Tj ET");
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y -= 18;
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rowNum++;
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}
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if (grouped.Count > rowNum)
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{
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cs.AppendLine("0.50 0.50 0.60 rg BT /F2 7 Tf");
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cs.AppendLine($"{Margin + 10:F2} {y:F2} Td");
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cs.AppendLine($"(... a dalsich {grouped.Count - rowNum} typov kusov) Tj ET");
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}
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// Footer
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cs.AppendLine("0.35 0.35 0.45 rg BT /F2 7 Tf");
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cs.AppendLine($"{Margin:F2} 10 Td");
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cs.AppendLine("(Generovane programom 3D Box Packer) Tj ET");
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byte[] csBytes = Encoding.Latin1.GetBytes(cs.ToString());
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// Page
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offsets[pageObj] = w.Pos;
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w.Obj(pageObj);
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w.Raw($"<< /Type /Page /Parent 2 0 R\n");
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w.Raw($" /MediaBox [0 0 {PageW:F2} {PageH:F2}]\n");
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w.Raw($" /Contents {contentObj} 0 R\n");
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w.Raw($" /Resources << /Font << /F1 {objFont1} 0 R /F2 {objFont2} 0 R >> >>\n>>\n");
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w.EndObj();
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// Content
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offsets[contentObj] = w.Pos;
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w.Obj(contentObj);
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w.Raw($"<< /Length {csBytes.Length} >>\nstream\n");
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w.Bytes(csBytes);
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w.Raw("\nendstream\n");
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w.EndObj();
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}
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// Fonts
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offsets[objFont1] = w.Pos;
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w.Obj(objFont1);
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w.Raw("<< /Type /Font /Subtype /Type1 /BaseFont /Helvetica-Bold /Encoding /WinAnsiEncoding >>\n");
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w.EndObj();
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offsets[objFont2] = w.Pos;
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w.Obj(objFont2);
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w.Raw("<< /Type /Font /Subtype /Type1 /BaseFont /Helvetica /Encoding /WinAnsiEncoding >>\n");
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w.EndObj();
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// xref
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long xrefPos = w.Pos;
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w.Raw($"xref\n0 {offsets.Length}\n");
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w.Raw("0000000000 65535 f \n");
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for (int i = 1; i < offsets.Length; i++)
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w.Raw($"{offsets[i]:D10} 00000 n \n");
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w.Raw($"trailer\n<< /Size {offsets.Length} /Root 1 0 R >>\n");
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w.Raw($"startxref\n{xrefPos}\n%%EOF\n");
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}
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}
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private static byte[] BitmapToJpeg(Bitmap bmp)
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{
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using (var ms = new MemoryStream())
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{
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var enc = GetJpegEncoder();
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var prms = new EncoderParameters(1);
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prms.Param[0] = new EncoderParameter(
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System.Drawing.Imaging.Encoder.Quality, (long)88);
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bmp.Save(ms, enc, prms);
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return ms.ToArray();
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}
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}
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private static ImageCodecInfo GetJpegEncoder() =>
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ImageCodecInfo.GetImageEncoders().First(c => c.MimeType == "image/jpeg");
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private static string EscPdf(string s) =>
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s.Replace("\\", "\\\\").Replace("(", "\\(").Replace(")", "\\)");
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private class PdfWriter
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{
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private readonly FileStream _fs;
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public long Pos => _fs.Position;
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public PdfWriter(FileStream fs) { _fs = fs; }
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public void Raw(string s) { var b = Encoding.Latin1.GetBytes(s); _fs.Write(b, 0, b.Length); }
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public void Bytes(byte[] b) { _fs.Write(b, 0, b.Length); }
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public void Obj(int n) { Raw($"{n} 0 obj\n"); }
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public void EndObj() { Raw("endobj\n"); }
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}
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}
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}
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