mirror of
https://github.com/wmjordan/PDFPatcher.git
synced 2026-10-18 21:52:34 +08:00
WMJ
662 lines
24 KiB
C#
662 lines
24 KiB
C#
using System;
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using System.Collections.Generic;
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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.Xml;
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using FreeImageAPI;
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using iTextSharp.text;
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using iTextSharp.text.pdf;
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using iTextSharp.text.pdf.parser;
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using PDFPatcher.Common;
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using PDFPatcher.Model;
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using iTextImage = iTextSharp.text.Image;
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namespace PDFPatcher.Processor
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{
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sealed class PdfDocumentCreator
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{
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internal static readonly string[] SupportedFileTypes = new string[] { ".pdf", ".tif", ".jpg", ".gif", ".png", ".tiff", ".bmp", ".jpeg", ".jp2", ".j2k" };
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static readonly string[] __BuiltInImageTypes = { ".png", ".jpg", ".jpeg", ".bmp", ".jp2", ".j2k" };
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static readonly string[] __MultiFrameImageTypes = { ".tif", ".tiff", ".gif" };
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static readonly PixelFormat[] __JpgFormats = new PixelFormat[] {
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PixelFormat.Format16bppGrayScale,
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PixelFormat.Format16bppRgb555,
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PixelFormat.Format16bppRgb565,
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PixelFormat.Format24bppRgb,
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PixelFormat.Format32bppRgb,
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PixelFormat.Format48bppRgb};
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internal static readonly PaperSize[] PaperSizes = new PaperSize[] {
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new PaperSize (PaperSize.AsPageSize, 0, 0),
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new PaperSize (PaperSize.FixedWidthAutoHeight, 0, 0),
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new PaperSize (PaperSize.AsWidestPage, 0, 0),
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new PaperSize (PaperSize.AsNarrowestPage, 0, 0),
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new PaperSize (PaperSize.AsLargestPage, 0, 0),
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new PaperSize (PaperSize.AsSmallestPage, 0, 0),
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new PaperSize ("16 开 (18.4*26.0)", 1840, 2600),
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new PaperSize ("32 开 (13.0*18.4)", 1300, 1840),
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new PaperSize ("大 32 开 (14.0*20.3)", 1400, 2030),
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new PaperSize ("A4 (21.0*29.7)", 2100, 2970),
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new PaperSize ("A3 (29.7*42.0)", 2970, 4200),
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new PaperSize ("自定义", 0, 0),
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new PaperSize ("————————————", 0, 0),
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new PaperSize ("8 开 (26.0*36.8)", 2600, 3680),
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new PaperSize ("16 开 (18.4*26.0)", 1840, 2600),
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new PaperSize ("大 16 开 (21.0*28.5)", 2100, 2850),
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new PaperSize ("32 开 (13.0*18.4)", 1300, 1840),
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new PaperSize ("大 32 开 (14.0*20.3)", 1400, 2030),
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new PaperSize ("8 K (27.3*39.3)", 2730, 3930),
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new PaperSize ("16 K (19.6*27.3)", 1960, 2730),
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new PaperSize ("A0 (84.1*118.9)", 8410, 11890),
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new PaperSize ("A1 (59.4*84.1)", 5940, 8410),
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new PaperSize ("A2 (42.0*59.4)", 4200, 5940),
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new PaperSize ("A3 (29.7*42.0)", 2970, 4200),
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new PaperSize ("A4 (21.0*29.7)", 2100, 2970),
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new PaperSize ("A5 (14.8*21.0)", 1480, 2100),
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new PaperSize ("A6 (10.5*14.8)", 1050, 1480),
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new PaperSize ("B0 (100.0*141.3)", 10000, 14130),
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new PaperSize ("B1 (70.7*100.0)", 7070, 10000),
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new PaperSize ("B2 (50.0*70.7)", 5000, 7070),
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new PaperSize ("B3 (35.3*50.0)", 3530, 5000),
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new PaperSize ("B4 (25.0*35.3)", 2500, 3530),
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new PaperSize ("B5 (17.6*25.0)", 1760, 2500),
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new PaperSize ("B6 (12.5*17.6)", 1250, 1760)
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};
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readonly MergerOptions _option;
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readonly Document _doc;
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readonly PdfCopy _writer;
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readonly PaperSize _content;
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readonly DocumentSink _sink;
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readonly PageBoxSettings _pageSettings;
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readonly bool _autoRotate;
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readonly HorizontalAlignment hAlign;
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readonly VerticalAlignment vAlign;
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readonly bool scaleUp, scaleDown;
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readonly bool areMarginsEqual;
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bool _portrait;
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int _inputDocumentCount;
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/// <summary>
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/// 在传入构造函数选项中保留链接时，获取最近处理的 PDF 文档的书签。
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/// </summary>
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public PdfInfoXmlDocument PdfBookmarks { get; }
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/// <summary>获取输入的文档数量。</summary>
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public int InputDocumentCount => _inputDocumentCount;
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public PdfDocumentCreator(DocumentSink sink, MergerOptions option, ImporterOptions impOptions, Document document, PdfCopy writer) {
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_sink = sink;
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_option = option;
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_doc = document;
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_writer = writer;
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var ps = _pageSettings = option.PageSettings;
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_content = new PaperSize(ps.PaperSize.PaperName, option.ContentWidth, option.ContentHeight);
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_portrait = _content.Height > _content.Width;
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_autoRotate = ps.AutoRotation && (_content.Height != _content.Width);
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hAlign = ps.HorizontalAlign;
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vAlign = ps.VerticalAlign;
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scaleUp = option.AutoScaleUp;
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scaleDown = option.AutoScaleDown;
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areMarginsEqual = (ps.Margins.Top == ps.Margins.Left
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&& ps.Margins.Top == ps.Margins.Right
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&& ps.Margins.Top == ps.Margins.Bottom);
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if (impOptions.ImportBookmarks) {
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PdfBookmarks = new PdfInfoXmlDocument();
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var root = PdfBookmarks.BookmarkRoot;
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}
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if (_content.SpecialSize == SpecialPaperSize.None) {
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_doc.SetPageSize(new Rectangle(ps.PaperSize.Width, ps.PaperSize.Height));
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}
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}
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internal void ProcessFile(SourceItem sourceFile, BookmarkContainer bookmarkContainer) {
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if (sourceFile.Type != SourceItem.ItemType.Empty) {
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Tracker.TraceMessage(Tracker.Category.InputFile, sourceFile.FilePath.ToString());
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}
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var b = CreateAutoBookmark(sourceFile, bookmarkContainer);
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switch (sourceFile.Type) {
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case SourceItem.ItemType.Empty:
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Tracker.TraceMessage("添加空白页。");
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AddEmptyPage();
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SetBookmarkAction(b);
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++_inputDocumentCount;
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break;
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case SourceItem.ItemType.Pdf:
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Tracker.TraceMessage("添加文档：" + sourceFile);
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AddPdfPages(sourceFile as SourceItem.Pdf, b);
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Tracker.IncrementProgress(sourceFile.FileSize);
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++_inputDocumentCount;
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break;
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case SourceItem.ItemType.Image:
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Tracker.TraceMessage("添加图片：" + sourceFile);
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AddImagePage(sourceFile, b);
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Tracker.IncrementProgress(sourceFile.FileSize);
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++_inputDocumentCount;
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break;
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case SourceItem.ItemType.Folder:
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Tracker.TraceMessage("添加文件夹：" + sourceFile);
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break;
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}
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if (!sourceFile.HasSubItems) {
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return;
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}
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var p = false;
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var pn = _writer.CurrentPageNumber;
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foreach (var item in sourceFile.Items) {
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ProcessFile(item, b ?? bookmarkContainer);
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if (p) {
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continue;
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}
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p = true;
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var t = b;
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while (b?.Page == 0) {
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b.Page = pn;
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b.DestinationView = Constants.DestinationAttributes.ViewType.XYZ;
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b.Top = _doc.PageSize.Height;
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b = b.ParentBookmark;
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}
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b = t;
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}
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}
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void AddImagePage(SourceItem source, BookmarkElement bookmark) {
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var ext = source.FilePath.FileExtension.ToLowerInvariant();
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var isIndexed = false;
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if (__BuiltInImageTypes.Contains(ext)) {
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try {
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using (var fi = new FreeImageBitmap(source.FilePath, (FREE_IMAGE_LOAD_FLAGS)0x0800/*仅加载图像尺寸信息*/)) {
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if (fi.HasPalette && fi.ImageFormat != FREE_IMAGE_FORMAT.FIF_JPEG && fi.ImageFormat != FREE_IMAGE_FORMAT.FIF_JP2) {
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isIndexed = true;
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goto ADVANCED_LOAD;
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}
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}
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}
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catch (FreeImageException) {
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Tracker.TraceMessage("无法添加文件：" + source.FilePath);
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return;
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}
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var image = LoadImage(source, ext);
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if (image == null) {
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Tracker.TraceMessage("无法添加文件：" + source.FilePath);
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return;
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}
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if (_option.DpiX > 0 || _option.DpiY > 0) {
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image.SetDpi(_option.DpiX.SubstituteDefault(image.DpiX), _option.DpiY.SubstituteDefault(image.DpiY));
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}
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var cs = image.Additional?.GetAsArray(PdfName.COLORSPACE);
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if (cs?.Size == 4 && PdfName.INDEXED.Equals(cs[0])) {
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isIndexed = true;
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}
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else {
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if ((ext == Constants.FileExtensions.Jpg || ext == Constants.FileExtensions.Jpeg)
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&& Imaging.JpgHelper.TryGetExifOrientation(source.FilePath, out var o)
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&& o != 0) {
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switch (o) {
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case 6: image.RotationDegrees = -90; break;
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case 3: image.RotationDegrees = 180; break;
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case 8: image.RotationDegrees = 90; break;
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}
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}
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AddImage(image);
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SetBookmarkAction(bookmark);
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return;
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}
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}
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ADVANCED_LOAD:
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if (isIndexed || __MultiFrameImageTypes.Contains(ext)) {
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FreeImageBitmap fi = null;
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try {
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fi = FreeImageBitmap.FromFile(source.FilePath);
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var c = fi.FrameCount;
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for (int i = 0; i < c; i++) {
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fi.SelectActiveFrame(i);
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var img = LoadImageFrame(source as SourceItem.Image, _option.RecompressWithJbig2, ref fi);
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if (_option.DpiX > 0 || _option.DpiY > 0) {
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img.SetDpi(_option.DpiX.SubstituteDefault(img.DpiX), _option.DpiY.SubstituteDefault(img.DpiY));
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}
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AddImage(img);
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if (i == 0) {
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SetBookmarkAction(bookmark);
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}
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}
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}
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finally {
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fi?.Dispose();
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}
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}
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}
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void SetBookmarkAction(BookmarkElement bookmark) {
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if (bookmark == null) {
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return;
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}
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bookmark.Page = _writer.PageEmpty ? _writer.CurrentPageNumber - 1 : _writer.CurrentPageNumber;
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bookmark.DestinationView = Constants.DestinationAttributes.ViewType.XYZ;
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bookmark.Top = _doc.PageSize.Height;
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}
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void AddEmptyPage() {
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switch (_content.SpecialSize) {
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case SpecialPaperSize.None:
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case SpecialPaperSize.AsSpecificPage:
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// 插入空白页
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_doc.NewPage();
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_writer.PageEmpty = false;
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break;
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case SpecialPaperSize.AsPageSize:
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if (_doc.PageSize.Width > 0) {
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goto case SpecialPaperSize.AsSpecificPage;
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}
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break;
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default:
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Tracker.TraceMessage("没有指定页面尺寸，无法插入空白页。");
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break;
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}
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}
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void AddPdfPages(SourceItem.Pdf sourceFile, BookmarkContainer bookmark) {
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var pdf = _sink.GetPdfReader(sourceFile.FilePath);
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if (pdf.ConfirmUnethicalMode() == false) {
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Tracker.TraceMessage("忽略了没有权限处理的文件：" + sourceFile.FilePath);
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if (_sink.DecrementReference(sourceFile.FilePath) < 1) {
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pdf.Close();
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}
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return;
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}
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var ranges = PageRangeCollection.Parse(sourceFile.PageRanges, 1, pdf.NumberOfPages, true);
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var pageRemapper = new int[pdf.NumberOfPages + 1];
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// 统一页面旋转角度
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if (_option.UnifyPageOrientation) {
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var rv = _option.RotateVerticalPages;
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var a = _option.RotateAntiClockwise ? -90 : 90;
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for (int i = pdf.NumberOfPages; i > 0; i--) {
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var p = pdf.GetPageN(i);
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var r = PdfHelper.GetPageVisibleRectangle(p);
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if (rv && r.Width < r.Height
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|| rv == false && r.Width > r.Height) {
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p.Put(PdfName.ROTATE, (r.Rotation + a) % 360);
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}
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}
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}
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if (bookmark != null) {
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var n = _writer.CurrentPageNumber + 1;
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if (_writer.PageEmpty) {
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n--;
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}
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bookmark.SetAttribute(Constants.DestinationAttributes.Page, n.ToText());
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bookmark.SetAttribute(Constants.DestinationAttributes.View, Constants.DestinationAttributes.ViewType.XYZ);
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var r = PdfHelper.GetPageVisibleRectangle(pdf.GetPageN(ranges[0].StartValue));
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float t = 0;
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switch ((r.Rotation % 360) / 90) {
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case 0: t = r.Top; break;
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case 1: t = r.Right; break;
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case 2: t = r.Bottom; break;
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case 3: t = r.Left; break;
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}
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bookmark.SetAttribute(Constants.Coordinates.Top, t.ToText());
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}
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var pdfItem = (sourceFile as SourceItem.Pdf);
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bool importImagesOnly = pdfItem.ImportImagesOnly;
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int pn = pdf.NumberOfPages;
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ImageExtractor imgExp = null;
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if (importImagesOnly) {
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imgExp = new ImageExtractor(pdfItem.ExtractImageOptions, pdf);
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}
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if (_option.KeepBookmarks) {
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pdf.ConsolidateNamedDestinations();
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}
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var pp = new byte[pdf.NumberOfPages + 1]; // 已处理过的页面
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var cts = _pageSettings.PaperSize.SpecialSize != SpecialPaperSize.AsPageSize ? new CoordinateTranslationSettings[pdf.NumberOfPages + 1] : null; // 页面的位置偏移量
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foreach (var r in ranges) {
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foreach (var i in r) {
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if (i < 1 || i > pn) {
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goto Exit;
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}
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if (pageRemapper != null) {
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pageRemapper[i] = _writer.CurrentPageNumber;
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}
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_doc.NewPage();
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if (imgExp != null) {
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imgExp.ExtractPageImages(pdf, i);
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foreach (var item in imgExp.InfoList) {
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if (item.FileName != null) {
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ProcessFile(new SourceItem.Image(item.FileName), bookmark);
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File.Delete(item.FileName);
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}
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}
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}
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else {
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if (pp[i] == 0) {
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var page = pdf.GetPageN(i);
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//if (DocInfoImporter.RemovePageAdditionalInfo (_docSettings, page)) {
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// pdf.ResetReleasePage ();
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//}
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//if (_docSettings.AutoMaskBWImages) {
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// SetBWImageMask (page);
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// pdf.ResetReleasePage ();
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//}
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//PdfHelper.ClearPageLinks (pdf, i);
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if (_pageSettings.PaperSize.SpecialSize != SpecialPaperSize.AsPageSize) {
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pdf.ResetReleasePage();
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var ct = PageDimensionProcessor.ResizePage(page, _pageSettings, null);
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if (_pageSettings.ScaleContent) {
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PageDimensionProcessor.ScaleContent(pdf, i, ct);
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}
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if (cts != null) {
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cts[i] = ct;
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}
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pdf.ResetReleasePage();
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}
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//var og = new OperatorGroup (null);
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//if (_docSettings.FixContents) {
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// og.Operators.Add (PdfContentStreamProcessor.NopOperator);
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//}
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//if (og.Operators.Count > 0) {
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// var cp = new PdfPageCommandProcessor ();
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// cp.ProcessContent (cb ?? pdf.GetPageContent (i), pdf.GetPageN (i).GetAsDict (PdfName.RESOURCES));
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// cp.WritePdfCommands (pdf, i);
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//}
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pp[i] = 1;
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}
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_writer.AddPage(_writer.GetImportedPage(pdf, i));
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}
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Exit:
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Tracker.IncrementProgress(1);
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}
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}
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_doc.SetPageSize(pdf.GetPageNRelease(ranges[ranges.Count - 1].EndValue).GetPageVisibleRectangle());
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if (_option.KeepBookmarks) {
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bookmark = KeepBookmarks(bookmark, pdf, pageRemapper, cts);
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}
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if (_sink.DecrementReference(sourceFile.FilePath) < 1) {
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_writer.FreeReader(pdf);
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pdf.Close();
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}
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}
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BookmarkContainer KeepBookmarks(BookmarkContainer bookmark, PdfReader pdf, int[] pageRemapper, CoordinateTranslationSettings[] cts) {
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var bm = OutlineManager.GetBookmark(pdf, new UnitConverter() { Unit = Constants.Units.Point });
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var processors = new List<IInfoDocProcessor>();
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if (_option.ViewerPreferences.CollapseBookmark != BookmarkStatus.AsIs) {
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processors.Add(new CollapseBookmarkProcessor() { BookmarkStatus = _option.ViewerPreferences.CollapseBookmark });
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}
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if (_option.ViewerPreferences.RemoveZoomRate) {
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processors.Add(new RemoveZoomRateProcessor());
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}
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if (_option.ViewerPreferences.ForceInternalLink) {
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processors.Add(new ForceInternalDestinationProcessor());
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}
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processors.Add(new GotoDestinationProcessor() {
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RemoveOrphanDestination = _option.RemoveOrphanBookmarks,
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PageRemapper = pageRemapper,
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TransitionMapper = cts
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});
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ProcessInfoItem(bm, processors);
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if (bookmark != null) {
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bookmark.SetAttribute(Constants.BookmarkAttributes.Open,
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_option.ViewerPreferences.CollapseBookmark == BookmarkStatus.CollapseAll
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? Constants.Boolean.False : Constants.Boolean.True);
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}
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else if (PdfBookmarks != null) {
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bookmark = PdfBookmarks.BookmarkRoot;
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}
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else {
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return bookmark;
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}
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if (bm != null) {
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XmlNode c;
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while ((c = bm.FirstChild) != null) {
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if (c.NodeType == XmlNodeType.Element) {
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bookmark.AppendChild(bookmark.OwnerDocument.ImportNode(c, true));
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}
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bm.RemoveChild(c);
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}
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}
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return bookmark;
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}
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internal static void ProcessInfoItem(XmlElement item, ICollection<IInfoDocProcessor> processors) {
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if (item == null) {
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return;
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}
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foreach (var p in processors) {
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p.Process(item);
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}
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var c = item.FirstChild;
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XmlNode r;
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XmlElement ce;
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while (c != null) {
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ce = c as XmlElement;
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r = c.PreviousSibling;
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if (ce != null) {
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ProcessInfoItem(ce, processors);
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}
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if (c.ParentNode == null) {
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// 节点在处理过程中被删除
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c = r != null ? r.NextSibling : item.FirstChild;
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}
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else {
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c = c.NextSibling;
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}
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}
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}
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//internal static void SetBWImageMask (PdfDictionary page) {
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// var xo = PdfHelper.Locate<PdfDictionary> (page, true, PdfName.RESOURCES, PdfName.XOBJECT);
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// foreach (var item in xo) {
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// var o = PdfReader.GetPdfObject (item.Value) as PdfDictionary;
|
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// if (o == null
|
|
// || PdfName.IMAGE.Equals(o.Get(PdfName.SUBTYPE)) == false
|
|
// || PdfHelper.ValueIs (o.GetAsBoolean (PdfName.IMAGEMASK), true)
|
|
// || PdfHelper.ValueIs (o.GetAsNumber (PdfName.BITSPERCOMPONENT), 1) == false) {
|
|
// continue;
|
|
// }
|
|
// o.Put (PdfName.IMAGEMASK, PdfBoolean.PDFTRUE);
|
|
// o.Remove (PdfName.MASK);
|
|
// var cs = o.GetAsArray (PdfName.COLORSPACE);
|
|
// if (cs != null && cs.Size == 4
|
|
// && PdfHelper.ValueIs (cs.GetAsName (0), PdfName.INDEXED)
|
|
// && PdfHelper.ValueIs (cs.GetAsName (1), PdfName.DEVICERGB)
|
|
// && PdfHelper.ValueIs (cs.GetAsNumber (2), 1)) {
|
|
// PdfObject cl = cs.GetDirectObject (3);
|
|
// byte[] l = null;
|
|
// if (cs.IsString ()) {
|
|
// l = (cl as PdfString).GetOriginalBytes ();
|
|
// }
|
|
// else if (cs.IsStream ()) {
|
|
// l = PdfReader.GetStreamBytes (cl as PRStream);
|
|
// }
|
|
// Array.Resize (ref l, 6);
|
|
// if (l[0] == 0xFF) {
|
|
|
|
// }
|
|
// }
|
|
// o.Remove (PdfName.COLORSPACE);
|
|
// }
|
|
//}
|
|
|
|
static iTextImage LoadImage(SourceItem sourceFile, string ext) {
|
|
var imageItem = sourceFile as SourceItem.Image;
|
|
var cropOptions = imageItem.Cropping;
|
|
if (imageItem == null || cropOptions.NeedCropping == false) {
|
|
return Image.GetInstance(sourceFile.FilePath.ToString());
|
|
}
|
|
ext = ext.ToLowerInvariant();
|
|
using (var fi = new FreeImageBitmap(sourceFile.FilePath)) {
|
|
if (fi.Height < cropOptions.MinHeight // 不满足尺寸限制
|
|
|| fi.Width < cropOptions.MinWidth
|
|
|| fi.Height <= cropOptions.Top + cropOptions.Bottom // 裁剪后尺寸小于 0
|
|
|| fi.Width <= cropOptions.Left + cropOptions.Right
|
|
) {
|
|
return Image.GetInstance(sourceFile.FilePath.ToString());
|
|
}
|
|
if (ext == Constants.FileExtensions.Jpg || ext == Constants.FileExtensions.Jpeg) {
|
|
// is JPEG file
|
|
var t = sourceFile.FilePath.EnsureExtension(Constants.FileExtensions.Jpg);
|
|
if (FreeImageBitmap.JPEGCrop(sourceFile.FilePath, t, cropOptions.Left, cropOptions.Top, fi.Width - cropOptions.Right, fi.Height - cropOptions.Bottom)) {
|
|
iTextImage image;
|
|
using (var fs = new FileStream(t, FileMode.Open)) {
|
|
image = Image.GetInstance(fs);
|
|
}
|
|
File.Delete(t);
|
|
return image;
|
|
}
|
|
}
|
|
|
|
using (var tmp = fi.Copy(cropOptions.Left, cropOptions.Top, fi.Width - cropOptions.Right, fi.Height - cropOptions.Bottom))
|
|
using (MemoryStream ms = new MemoryStream()) {
|
|
tmp.Save(ms, fi.ImageFormat);
|
|
ms.Flush();
|
|
ms.Position = 0;
|
|
return Image.GetInstance(ms);
|
|
}
|
|
}
|
|
}
|
|
|
|
BookmarkElement CreateAutoBookmark(SourceItem sourceFile, XmlElement bookmarkContainer) {
|
|
if (PdfBookmarks == null
|
|
|| sourceFile.Bookmark == null
|
|
|| String.IsNullOrEmpty(sourceFile.Bookmark.Title)) {
|
|
return null;
|
|
}
|
|
var b = PdfBookmarks.CreateBookmark(sourceFile.Bookmark);
|
|
bookmarkContainer.AppendChild(b);
|
|
return b;
|
|
}
|
|
|
|
void AddImage(iTextImage image) {
|
|
if (_option.AutoMaskBWImages && image.IsMaskCandidate()) {
|
|
image.MakeMask();
|
|
}
|
|
image.ScalePercent(72f / image.DpiX.SubstituteDefault(72) * 100f, 72f / image.DpiY.SubstituteDefault(72) * 100f);
|
|
if (_content.SpecialSize == SpecialPaperSize.AsPageSize) {
|
|
_doc.SetPageSize(new Rectangle(image.ScaledWidth + _doc.LeftMargin + _doc.RightMargin, image.ScaledHeight + _doc.TopMargin + _doc.BottomMargin));
|
|
}
|
|
else if (_content.SpecialSize == SpecialPaperSize.FixedWidthAutoHeight) {
|
|
if ((scaleDown && image.ScaledWidth > _content.Width) ||
|
|
(scaleUp && image.ScaledWidth < _content.Width)) {
|
|
image.ScaleToFit(_content.Width, 999999);
|
|
}
|
|
_doc.SetPageSize(new Rectangle(_content.Width, image.ScaledHeight + _doc.TopMargin + _doc.BottomMargin));
|
|
}
|
|
else {
|
|
if (_autoRotate
|
|
&& (// 页面不足以放下当前尺寸的图片
|
|
(image.ScaledHeight > _content.Height || image.ScaledWidth > _content.Width)
|
|
&& (image.ScaledWidth > image.ScaledHeight && _portrait == true
|
|
|| image.ScaledHeight > image.ScaledWidth && _portrait == false)
|
|
||
|
|
// 图片较小，可以还原为原始的页面方向
|
|
(_portrait != image.Height > image.Width
|
|
&& image.ScaledHeight <= _content.Height && image.ScaledWidth <= _content.Width
|
|
&& image.ScaledHeight <= _content.Width && image.ScaledWidth <= _content.Height)
|
|
)
|
|
) {
|
|
var t = _content.Height;
|
|
_content.Height = _content.Width;
|
|
_content.Width = t;
|
|
_doc.SetPageSize(new Rectangle(_doc.PageSize.Height, _doc.PageSize.Width));
|
|
if (areMarginsEqual == false) {
|
|
if (_portrait) {
|
|
_doc.SetMargins(_doc.BottomMargin, _doc.TopMargin, _doc.LeftMargin, _doc.RightMargin);
|
|
}
|
|
else {
|
|
_doc.SetMargins(_doc.TopMargin, _doc.BottomMargin, _doc.RightMargin, _doc.LeftMargin);
|
|
}
|
|
}
|
|
_portrait = !_portrait;
|
|
}
|
|
if ((scaleDown && (image.ScaledHeight > _content.Height || image.ScaledWidth > _content.Width))
|
|
|| (scaleUp && image.ScaledHeight < _content.Height && image.ScaledWidth < _content.Width)) {
|
|
image.ScaleToFit(_content.Width, _content.Height);
|
|
}
|
|
float px = 0, py = 0;
|
|
if (hAlign == HorizontalAlignment.Center) {
|
|
px = (_content.Width - image.ScaledWidth) / 2f;
|
|
}
|
|
else if (hAlign == HorizontalAlignment.Right) {
|
|
px = _content.Width - image.ScaledWidth;
|
|
}
|
|
if (vAlign == VerticalAlignment.Middle) {
|
|
py = (_content.Height - image.ScaledHeight) / 2f;
|
|
}
|
|
else if (vAlign == VerticalAlignment.Top) {
|
|
py = _content.Height - image.ScaledHeight;
|
|
}
|
|
image.SetAbsolutePosition(_doc.LeftMargin + px, _doc.BottomMargin + py);
|
|
}
|
|
_doc.NewPage();
|
|
_doc.Add(image);
|
|
_doc.NewPage();
|
|
}
|
|
|
|
static Image LoadImageFrame(SourceItem.Image source, bool recompressWithJbig2, ref FreeImageBitmap fi) {
|
|
iTextImage image;
|
|
var cropOptions = source.Cropping;
|
|
FREE_IMAGE_FORMAT format;
|
|
if (fi.ImageFormat == FREE_IMAGE_FORMAT.FIF_GIF
|
|
|| fi.InfoHeader.biCompression == FreeImage.BI_PNG) {
|
|
format = FREE_IMAGE_FORMAT.FIF_PNG;
|
|
}
|
|
else if (fi.ColorDepth > 8
|
|
&& fi.ColorType == FREE_IMAGE_COLOR_TYPE.FIC_RGB
|
|
&& fi.HasPalette == false
|
|
&& __JpgFormats.Contains(fi.PixelFormat)
|
|
&& (fi.ImageFormat != FREE_IMAGE_FORMAT.FIF_TIFF || fi.InfoHeader.biCompression != 0)) {
|
|
format = FREE_IMAGE_FORMAT.FIF_JPEG;
|
|
}
|
|
else if (fi.PixelFormat == PixelFormat.Format1bppIndexed && fi.ImageFormat != FREE_IMAGE_FORMAT.FIF_TIFF && recompressWithJbig2 == false) {
|
|
format = FREE_IMAGE_FORMAT.FIF_TIFF;
|
|
}
|
|
else if (fi.ColorDepth > 8) {
|
|
format = FREE_IMAGE_FORMAT.FIF_PNG;
|
|
}
|
|
else if (fi.InfoHeader.biCompression == FreeImage.BI_JPEG) {
|
|
format = FREE_IMAGE_FORMAT.FIF_JPEG;
|
|
}
|
|
else {
|
|
format = fi.ImageFormat;
|
|
}
|
|
using (MemoryStream ms = new MemoryStream()) {
|
|
if (cropOptions.NeedCropping
|
|
&& (fi.Height < cropOptions.MinHeight // 不满足尺寸限制
|
|
|| fi.Width < cropOptions.MinWidth
|
|
|| fi.Height <= cropOptions.Top + cropOptions.Bottom // 裁剪后尺寸小于 0
|
|
|| fi.Width <= cropOptions.Left + cropOptions.Right) == false) {
|
|
var temp = fi.Copy(cropOptions.Left, cropOptions.Top, fi.Width - cropOptions.Right, fi.Height - cropOptions.Bottom);
|
|
temp.Save(ms, format);
|
|
fi.Dispose();
|
|
fi = temp;
|
|
}
|
|
else {
|
|
fi.Save(ms, format);
|
|
}
|
|
ms.Flush();
|
|
ms.Position = 0;
|
|
if (recompressWithJbig2 && fi.PixelFormat == PixelFormat.Format1bppIndexed) {
|
|
image = iTextImage.GetInstance(fi.Width, fi.Height, Imaging.JBig2Encoder.Encode(fi), null);
|
|
}
|
|
else {
|
|
try {
|
|
image = iTextImage.GetInstance(ms.ToArray(), true);
|
|
}
|
|
catch (IndexOutOfRangeException) {
|
|
// 在某些场合下 FreeImage 保存的流无法被读取，尝试读原始文件，让 iTextImage 自行解析
|
|
image = iTextImage.GetInstance(source.FilePath.ReadAllBytes(), true);
|
|
}
|
|
}
|
|
}
|
|
if (fi.HorizontalResolution != fi.VerticalResolution) {
|
|
image.SetDpi(fi.HorizontalResolution.ToInt32(), fi.VerticalResolution.ToInt32());
|
|
}
|
|
return image;
|
|
}
|
|
|
|
}
|
|
}
|