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Auto-rotate images based on EXIF data

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This commit is contained in:
Michael Babienco
2026-02-25 07:45:51 +09:00
parent 851772398c
commit b42da7603b
1 changed files with 43 additions and 25 deletions
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src/ViewModels/MainViewModel.cs
+43 -25
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@@ -606,6 +606,12 @@ class MainViewModel : BaseViewModel, IFontResolver, ICanCheckShutdown
reportTitlePar.Format.Font.Name = "Noto Sans JP"; // has english letters in it, too reportTitlePar.Format.Font.Name = "Noto Sans JP"; // has english letters in it, too
reportTitlePar.AddText(ReportTitle); reportTitlePar.AddText(ReportTitle);
// //
var convertedDir = Path.Combine(folderPath, "converted");
if (!Directory.Exists(convertedDir))
{
Directory.CreateDirectory(convertedDir);
}
//
GlobalFontSettings.FontResolver = this; GlobalFontSettings.FontResolver = this;
GlobalFontSettings.FallbackFontResolver = new FailsafeFontResolver(); GlobalFontSettings.FallbackFontResolver = new FailsafeFontResolver();
var hasAddedData = false; var hasAddedData = false;
@@ -661,35 +667,47 @@ class MainViewModel : BaseViewModel, IFontResolver, ICanCheckShutdown
var info = new FileInfo(file.FilePath); var info = new FileInfo(file.FilePath);
uint loadedImageWidth = 0; uint loadedImageWidth = 0;
uint loadedImageHeight = 0; uint loadedImageHeight = 0;
if (isHEIC || isWebp || isPNG || (!isPDF && info.Length > 2.5 * 1024 * 1024 /* 2.5 MB */)) if (!isPDF)
{ {
// Save image as jpg
var convertedDir = Path.Combine(folderPath, "converted");
if (!Directory.Exists(convertedDir))
{
Directory.CreateDirectory(convertedDir);
}
var outputPath = Path.Combine(convertedDir, info.Name + ".jpg");
using var mImage = new MagickImage(info.FullName); using var mImage = new MagickImage(info.FullName);
loadedImageWidth = mImage.Width; var convertedOutputPath = Path.Combine(convertedDir, info.Name + ".jpg");
loadedImageHeight = mImage.Height; var didAdjust = false;
mImage.Quality = 80; LogInfo("Image orientation of {0} is {1}", fileName, mImage.Orientation);
if (mImage.Width >= 400 || mImage.Height >= 400) if (mImage.Orientation != OrientationType.TopLeft)
{ {
loadedImageWidth = (uint)Math.Floor(mImage.Width * 0.5); LogInfo("Auto-adjusted image orientation of {0}", fileName);
loadedImageHeight = (uint)Math.Floor(mImage.Height * 0.5); mImage.AutoOrient();
mImage.Scale(loadedImageWidth, loadedImageHeight); didAdjust = true;
}
// perform needed image manipulations
if (isHEIC || isWebp || isPNG || (!isPDF && info.Length > 2.5 * 1024 * 1024 /* 2.5 MB */))
{
// Save image as jpg
loadedImageWidth = mImage.Width;
loadedImageHeight = mImage.Height;
mImage.Quality = 80;
if (mImage.Width >= 400 || mImage.Height >= 400)
{
loadedImageWidth = (uint)Math.Floor(mImage.Width * 0.5);
loadedImageHeight = (uint)Math.Floor(mImage.Height * 0.5);
mImage.Scale(loadedImageWidth, loadedImageHeight);
LogInfo("Image {2} scaled to {0}x{1}", loadedImageWidth, loadedImageHeight, fileName);
}
didAdjust = true;
LogInfo("Converted image {0} to JPEG", fileName);
}
else
{
// load height/width
loadedImageWidth = mImage.Width;
loadedImageHeight = mImage.Height;
}
if (didAdjust)
{
await mImage.WriteAsync(convertedOutputPath);
filePath = Path.Combine("Converted", info.Name + ".jpg");
LogInfo(string.Format("Saved adjusted image to JPEG; fileName is now {0}", file.FilePath));
} }
await mImage.WriteAsync(outputPath);
filePath = Path.Combine("Converted", info.Name + ".jpg");
LogInfo(string.Format("Converted image to JPEG; fileName is now {0}", file.FilePath));
}
else if (!isPDF)
{
// load height/width
using var mImage = new MagickImage(info.FullName);
loadedImageWidth = mImage.Width;
loadedImageHeight = mImage.Height;
} }
var paragraph = section.AddParagraph(); var paragraph = section.AddParagraph();
paragraph.Format.Alignment = ParagraphAlignment.Center; paragraph.Format.Alignment = ParagraphAlignment.Center;