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Printing: Replace PdfiumViewer with native pdfium.dll binary
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This commit is contained in:
Lorenz Stechauner
2026-02-17 17:21:38 +01:00
parent f1737af2a2
commit 751246537e
5 changed files with 111 additions and 9 deletions
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5
Elwig/Elwig.csproj
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@@ -3,6 +3,7 @@
<PropertyGroup>
<OutputType>WinExe</OutputType>
<TargetFramework>net10.0-windows</TargetFramework>
<PlatformTarget>x64</PlatformTarget>
<Nullable>enable</Nullable>
<UseWPF>true</UseWPF>
<UseWindowsForms>true</UseWindowsForms>
@@ -22,6 +23,7 @@
</ItemGroup>
<ItemGroup>
<PackageReference Include="bblanchon.PDFium.Win32" Version="147.0.7690" />
<PackageReference Include="CommunityToolkit.Mvvm" Version="8.4.0" />
<PackageReference Include="LinqKit" Version="1.3.9" />
<PackageReference Include="MailKit" Version="4.14.1" />
@@ -31,15 +33,12 @@
<PackageReference Include="Microsoft.Extensions.Configuration.Ini" Version="10.0.2" />
<PackageReference Include="Microsoft.Web.WebView2" Version="1.0.3650.58" />
<PackageReference Include="NJsonSchema" Version="11.5.2" />
<PackageReference Include="PdfiumViewer.Updated" Version="2.14.5" />
<PackageReference Include="PdfiumViewer.Native.x86_64.no_v8-no_xfa" Version="2018.4.8.256" />
<PackageReference Include="RazorLight" Version="2.3.1" />
<PackageReference Include="ScottPlot.WPF" Version="5.1.57" />
<PackageReference Include="SQLitePCLRaw.bundle_e_sqlite3" Version="3.0.2" />
<PackageReference Include="System.IO.Hashing" Version="10.0.2" />
<PackageReference Include="System.IO.Ports" Version="10.0.2" />
<PackageReference Include="System.Management" Version="10.0.2" />
<PackageReference Include="System.Text.Encoding.CodePages" Version="10.0.2" />
</ItemGroup>
</Project>

9
Elwig/Helpers/Printing/Pdf.cs
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@@ -1,5 +1,4 @@
using Elwig.Windows;
using PdfiumViewer;
using System;
using System.Collections.Generic;
using System.Diagnostics;
@@ -27,6 +26,7 @@ namespace Elwig.Helpers.Printing {
public static bool IsReady => WinziPrintProc != null;
public static async Task Init(Action? evtHandler = null) {
PdfiumNative.FPDF_InitLibrary();
// NOTE: If the WinziPrint daemon is already running this will succeed, but the process will fail.
// Should be no problem, as long as the daemon is not closed
var p = new Process() { StartInfo = new() {
@@ -47,6 +47,7 @@ namespace Elwig.Helpers.Printing {
public static Task Cleanup() {
WinziPrintProc?.Kill(true);
WinziPrintProc?.Close();
PdfiumNative.FPDF_DestroyLibrary();
return Task.CompletedTask;
}
@@ -123,9 +124,9 @@ namespace Elwig.Helpers.Printing {
public static Task Print(string path, PrinterSettings settings) {
try {
using var doc = PdfDocument.Load(path);
using var printDoc = doc.CreatePrintDocument(PdfPrintMode.CutMargin);
printDoc.PrinterSettings = settings;
using var printDoc = new PdfPrintDocument(path) {
PrinterSettings = settings,
};
printDoc.Print();
} catch (Exception e) {
MessageBox.Show("Beim Drucken ist ein Fehler aufgetreten:\n\n" + e.Message, "Fehler beim Drucken", MessageBoxButton.OK, MessageBoxImage.Error);

102
Elwig/Helpers/Printing/PdfPrintDocument.cs Normal file
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@@ -0,0 +1,102 @@
using System;
using System.Drawing;
using System.Drawing.Imaging;
using System.Drawing.Printing;
using System.Runtime.InteropServices;
namespace Elwig.Helpers.Printing {
public class PdfPrintDocument : PrintDocument {
private readonly IntPtr _handle;
private readonly int _pageCount;
private readonly double _dpi;
private int _currentPage;
public PdfPrintDocument(string path, string? password = null, double dpi = 300.0) :
base() {
_handle = PdfiumNative.FPDF_LoadDocument(path, password);
_pageCount = PdfiumNative.FPDF_GetPageCount(_handle);
_dpi = dpi;
}
protected override void Dispose(bool disposing) {
PdfiumNative.FPDF_CloseDocument(_handle);
base.Dispose(disposing);
}
protected override void OnBeginPrint(PrintEventArgs evt) {
_currentPage = (PrinterSettings.FromPage != 0) ? (PrinterSettings.FromPage - 1) : 0;
base.OnBeginPrint(evt);
}
protected override void OnPrintPage(PrintPageEventArgs evt) {
if (_currentPage < _pageCount) {
IntPtr page = PdfiumNative.FPDF_LoadPage(_handle, _currentPage);
double width = PdfiumNative.FPDF_GetPageWidth(page);
double height = PdfiumNative.FPDF_GetPageHeight(page);
int pixelWidth = (int)(width / 72.0 * _dpi);
int pixelHeight = (int)(height / 72.0 * _dpi);
IntPtr bitmap = PdfiumNative.FPDFBitmap_Create(pixelWidth, pixelHeight, 1);
PdfiumNative.FPDF_RenderPageBitmap(bitmap, page, 0, 0, pixelWidth, pixelHeight, 0, 0);
IntPtr buffer = PdfiumNative.FPDFBitmap_GetBuffer(bitmap);
int stride = PdfiumNative.FPDFBitmap_GetStride(bitmap);
using (var bmp = new Bitmap(pixelWidth, pixelHeight, stride, PixelFormat.Format32bppArgb, buffer)) {
evt.Graphics?.DrawImage(bmp, evt.PageBounds);
}
_currentPage++;
PdfiumNative.FPDFBitmap_Destroy(bitmap);
PdfiumNative.FPDF_ClosePage(page);
}
evt.HasMorePages = _currentPage < ((PrinterSettings.ToPage == 0) ? _pageCount : Math.Min(PrinterSettings.ToPage, _pageCount));
base.OnPrintPage(evt);
}
}
internal partial class PdfiumNative {
[LibraryImport("pdfium.dll")]
public static partial void FPDF_InitLibrary();
[LibraryImport("pdfium.dll")]
public static partial void FPDF_DestroyLibrary();
[LibraryImport("pdfium.dll", StringMarshalling = StringMarshalling.Utf8)]
public static partial IntPtr FPDF_LoadDocument(string filePath, string? password);
[LibraryImport("pdfium.dll")]
public static partial void FPDF_CloseDocument(IntPtr document);
[LibraryImport("pdfium.dll")]
public static partial int FPDF_GetPageCount(IntPtr document);
[LibraryImport("pdfium.dll")]
public static partial IntPtr FPDF_LoadPage(IntPtr document, int pageIndex);
[LibraryImport("pdfium.dll")]
public static partial void FPDF_ClosePage(IntPtr page);
[LibraryImport("pdfium.dll")]
public static partial double FPDF_GetPageWidth(IntPtr page);
[LibraryImport("pdfium.dll")]
public static partial double FPDF_GetPageHeight(IntPtr page);
[LibraryImport("pdfium.dll")]
public static partial IntPtr FPDFBitmap_Create(int width, int height, int alpha);
[LibraryImport("pdfium.dll")]
public static partial void FPDFBitmap_Destroy(IntPtr bitmap);
[LibraryImport("pdfium.dll")]
public static partial IntPtr FPDFBitmap_GetBuffer(IntPtr bitmap);
[LibraryImport("pdfium.dll")]
public static partial int FPDFBitmap_GetStride(IntPtr bitmap);
[LibraryImport("pdfium.dll")]
public static partial void FPDF_RenderPageBitmap(IntPtr bitmap, IntPtr page, int start_x, int start_y, int size_x, int size_y, int rotate, int flags);
}
}

2
Elwig/Windows/AboutWindow.xaml
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@@ -22,7 +22,7 @@
Programmiersprache: C#<LineBreak/>
Framework: Windows Presentation Framework (WPF)<LineBreak/>
Datenbank: <Hyperlink NavigateUri="https://sqlite.org/" RequestNavigate="Hyperlink_RequestNavigate">SQLite</Hyperlink><LineBreak/>
PDF-Erstellung: <Hyperlink NavigateUri="https://weasyprint.org/" RequestNavigate="Hyperlink_RequestNavigate">WeasyPrint</Hyperlink>, <Hyperlink NavigateUri="https://github.com/toddams/RazorLight" RequestNavigate="Hyperlink_RequestNavigate">RazorLight</Hyperlink>, <Hyperlink NavigateUri="https://github.com/pvginkel/PdfiumViewer" RequestNavigate="Hyperlink_RequestNavigate">PdfiumViewer</Hyperlink><LineBreak/>
PDF-Erstellung: <Hyperlink NavigateUri="https://weasyprint.org/" RequestNavigate="Hyperlink_RequestNavigate">WeasyPrint</Hyperlink>, <Hyperlink NavigateUri="https://github.com/toddams/RazorLight" RequestNavigate="Hyperlink_RequestNavigate">RazorLight</Hyperlink>, <Hyperlink NavigateUri="https://github.com/bblanchon/pdfium-binaries" RequestNavigate="Hyperlink_RequestNavigate">Pdfium</Hyperlink><LineBreak/>
Paketierung: <Hyperlink NavigateUri="https://www.firegiant.com/wixtoolset/" RequestNavigate="Hyperlink_RequestNavigate">WiX Toolset</Hyperlink>
</TextBlock>

2
README.md
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@@ -43,5 +43,5 @@ Packaging: [WiX Toolset](https://www.firegiant.com/wixtoolset/)
Programmiersprache: C#
Framework: Windows Presentation Framework (WPF)
Datenbank: [SQLite](https://sqlite.org/)
PDF-Erstellung: [WeasyPrint](https://weasyprint.org/), [RazorLight](https://github.com/toddams/RazorLight), [PdfiumViewer](https://github.com/pvginkel/PdfiumViewer)
PDF-Erstellung: [WeasyPrint](https://weasyprint.org/), [RazorLight](https://github.com/toddams/RazorLight), [Pdfium](https://github.com/bblanchon/pdfium-binaries)
Paketierung: [WiX Toolset](https://www.firegiant.com/wixtoolset/)