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Allow rendering with Docnet PDF

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This commit is contained in:
Michael Babienco
2026-03-02 16:24:05 +09:00
parent 5f99d0e4eb
commit d51017bb73
4 changed files with 129 additions and 26 deletions
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src/ViewModels/MainViewModel.cs
+89 -26
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@@ -21,6 +21,14 @@ using MayShow.Interfaces;
using MayShow.Models;
using MayShows.Helpers;
using Docnet.Core.Models;
using Docnet.Core;
using SixLabors.ImageSharp;
using SixLabors.ImageSharp.PixelFormats;
using SixLabors.ImageSharp.Processing;
using System.Reflection.Metadata.Ecma335;
using Docnet.Core.Readers;
namespace MayShow.ViewModels;
class MainViewModel : BaseViewModel, IFontResolver, ICanCheckShutdown
@@ -708,40 +716,95 @@ class MainViewModel : BaseViewModel, IFontResolver, ICanCheckShutdown
filePath = convertedOutputPath;
LogInfo(string.Format("Saved adjusted image to JPEG; file path is now {0}", filePath));
}
}
var paragraph = section.AddParagraph();
paragraph.Format.Alignment = ParagraphAlignment.Center;
var image = paragraph.AddImage(filePath);
image.LockAspectRatio = true;
if (!isPDF && loadedImageHeight > 600)
{
image.Height = 550; // make sure it will fit on one page
// write to PDF
var paragraph = section.AddParagraph();
paragraph.Format.Alignment = ParagraphAlignment.Center;
var image = paragraph.AddImage(filePath);
image.LockAspectRatio = true;
if (!isPDF && loadedImageHeight > 600)
{
image.Height = 550; // make sure it will fit on one page
}
else
{
image.Width = imageWidth; // can't be too wide now...not sure why...maybe due to margins...
}
}
else
{
image.Width = imageWidth; // can't be too wide now...not sure why...maybe due to margins...
}
LogInfo(string.Format("Added image: {0} ({1})", file.Title, filePath));
if (isPDF)
{
// add other PDF pages
// see: https://stackoverflow.com/a/65091204/3938401
var pdfFileToAdd = PdfReader.Open(filePath, PdfDocumentOpenMode.Import);
var pgCount = pdfFileToAdd.PageCount;
pdfFileToAdd.Close();
imageTitlePar.AddText(string.Format(" (PDF with {0} page{1}) ",
pgCount,
pgCount == 1 ? "" : "s"));
for (var j = 2; j <= pgCount; j++)
// need to render PDF to images
if (_settings.UseDocnetPFDImageRendering)
{
section.AddPageBreak();
paragraph = section.AddParagraph();
// render using Docnet library (which utilizes pdfium, the chrome renderer)
string RenderPdfPageToImage(IDocReader docReader, int pgNum)
{
Console.WriteLine("rendering pg " + pgNum);
using var pageReader = docReader.GetPageReader(pgNum);
var rawBytes = pageReader.GetImage(RenderFlags.RenderAnnotations);
var width = pageReader.GetPageWidth();
var height = pageReader.GetPageHeight();
using var img = Image.LoadPixelData<Bgra32>(rawBytes, width, height);
// you are likely going to want this as well otherwise you might end up with transparent parts.
img.Mutate(x => x.BackgroundColor(SixLabors.ImageSharp.Color.White));
var pdfPageImageOutputPath = Path.Combine(convertedDir, info.Name + "-Page-"
+ (pgNum + 1).ToString().PadLeft(3, '0') + ".jpg");
img.Save(pdfPageImageOutputPath);
return pdfPageImageOutputPath;
}
// render all pages to images
using var docReader = DocLib.Instance.GetDocReader(
filePath,
new PageDimensions(1080, 1920)); // TODO: are these dims right?
// add to document
var pgCount = docReader.GetPageCount();
if (pgCount > 0)
{
var convertedPdfImagePath = RenderPdfPageToImage(docReader, 0);
imageTitlePar.AddText(string.Format(" (PDF with {0} page{1}) ",
pgCount,
pgCount == 1 ? "" : "s"));
var paragraph = section.AddParagraph();
paragraph.Format.Alignment = ParagraphAlignment.Center;
var image = paragraph.AddImage(convertedPdfImagePath);
for (var j = 1; j < pgCount; j++)
{
section.AddPageBreak();
paragraph = section.AddParagraph();
paragraph.Format.Alignment = ParagraphAlignment.Center;
convertedPdfImagePath = RenderPdfPageToImage(docReader, j);
image = paragraph.AddImage(convertedPdfImagePath);
image.LockAspectRatio = true;
image.Width = imageWidth;
}
}
}
else
{
// render first page (eventually need to improve code to just do everything in a loop)
var paragraph = section.AddParagraph();
paragraph.Format.Alignment = ParagraphAlignment.Center;
image = paragraph.AddImage(filePath + "#" + j);
var image = paragraph.AddImage(filePath);
image.LockAspectRatio = true;
image.Width = imageWidth;
image.Width = imageWidth; // can't be too wide now...not sure why...maybe due to margins...
// render other PDF pages, if any
// see: https://stackoverflow.com/a/65091204/3938401
var pdfFileToAdd = PdfReader.Open(filePath, PdfDocumentOpenMode.Import);
var pgCount = pdfFileToAdd.PageCount;
imageTitlePar.AddText(string.Format(" (PDF with {0} page{1}) ",
pgCount,
pgCount == 1 ? "" : "s"));
for (var j = 2; j <= pgCount; j++)
{
section.AddPageBreak();
paragraph = section.AddParagraph();
paragraph.Format.Alignment = ParagraphAlignment.Center;
image = paragraph.AddImage(filePath + "#" + j);
image.LockAspectRatio = true;
image.Width = imageWidth;
}
}
}
LogInfo(string.Format("Added image: {0} ({1})", file.Title, filePath));
hasAddedData = true;
}
var pdfRenderer = new PdfDocumentRenderer