private static void ConvertDocumentToImage(
string inputFile,
string outputFile,
RasterImageFormat outputFormat,
int bitsPerPixel)
{
if (!File.Exists(inputFile))
{
throw new ArgumentException($"{inputFile} not found.", nameof(inputFile));
}
if (bitsPerPixel != 0 && bitsPerPixel != 1 && bitsPerPixel != 2 && bitsPerPixel != 4 &&
bitsPerPixel != 8 && bitsPerPixel != 16 && bitsPerPixel != 24 && bitsPerPixel != 32)
{
throw new ArgumentOutOfRangeException(nameof(bitsPerPixel), bitsPerPixel,
$"Invalid {nameof(bitsPerPixel)} value");
}
using (var codecs = new RasterCodecs())
{
codecs.Options.RasterizeDocument.Load.XResolution = 300;
codecs.Options.RasterizeDocument.Load.YResolution = 300;
// indicates the start of a loop from the same source file
codecs.StartOptimizedLoad();
var totalPages = codecs.GetTotalPages(inputFile);
if (totalPages > 1 && !RasterCodecs.FormatSupportsMultipageSave(outputFormat))
{
Console.WriteLine($"The {outputFormat} format does not support multiple pages.\n"
+ "The resulting file will only contain the only last page of the document.");
}
for (var pageNumber = 1; pageNumber <= totalPages; pageNumber++)
{
Console.WriteLine($"Loading and saving page {pageNumber}");
using (var rasterImage = codecs.Load(inputFile, bitsPerPixel, CodecsLoadByteOrder.Bgr, pageNumber, pageNumber))
codecs.Save(rasterImage, outputFile, outputFormat, bitsPerPixel, 1, -1, 1, CodecsSavePageMode.Append);
}
// indicates the end of the load for the source file
codecs.StopOptimizedLoad();
}
}
public static List <ImageInfo> ConvertDocumentToImage(
string inputFile,
string outputFileTemplate,
RasterImageFormat outputFormat,
int bitsPerPixel,
HashSet <string> justThese)
{
if (justThese == null)
{
justThese = new HashSet <string>();
}
if (!File.Exists(inputFile))
{
throw new ArgumentException($"{inputFile} not found.", nameof(inputFile));
}
if (bitsPerPixel != 0 && bitsPerPixel != 1 && bitsPerPixel != 2 && bitsPerPixel != 4 &&
bitsPerPixel != 8 && bitsPerPixel != 16 && bitsPerPixel != 24 && bitsPerPixel != 32)
{
throw new ArgumentOutOfRangeException(nameof(bitsPerPixel), bitsPerPixel,
$"Invalid {nameof(bitsPerPixel)} value");
}
var retFiles = new List <ImageInfo>();
using (var codecs = new RasterCodecs())
{
codecs.Options.RasterizeDocument.Load.XResolution = 300;
codecs.Options.RasterizeDocument.Load.YResolution = 300;
// indicates the start of a loop from the same source file
codecs.StartOptimizedLoad();
var totalPages = codecs.GetTotalPages(inputFile);
/*
* if (totalPages > 1 && !RasterCodecs.FormatSupportsMultipageSave(outputFormat))
* throw new NotSupportedException(
* $"The {outputFormat} format does not support multiple pages.");
*/
for (var pageNumber = 1; pageNumber <= totalPages; pageNumber++)
{
string newOutfile = outputFileTemplate.Replace("{page}", pageNumber.ToString("D2"));
string stem = Path.GetFileNameWithoutExtension(newOutfile);
if (justThese.Count > 0 && !justThese.Contains(stem))
{
continue;
}
if (File.Exists(newOutfile))
{
logger.Info($"File already exists {newOutfile}");
retFiles.Add(new ImageInfo()
{
ImageFileInfo = new FileInfo(newOutfile)
});
continue;
}
logger.Info($"Loading and saving page {newOutfile}");
var rasterImage =
codecs.Load(inputFile, bitsPerPixel, CodecsLoadByteOrder.Bgr, pageNumber, pageNumber);
codecs.Save(rasterImage, newOutfile, outputFormat, bitsPerPixel, 1, -1, 1, CodecsSavePageMode.Replace);
retFiles.Add(new ImageInfo()
{
Image = rasterImage, ImageFileInfo = new FileInfo(newOutfile)
});
}
// indicates the end of the load for the source file
codecs.StopOptimizedLoad();
}
return(retFiles);
}