private void ConfigureCommonImage(UserSetting setting, Ghostscript.Converter gs)
{
gs.AddOption("ColorConversionStrategy", setting.Grayscale ? "/Gray" : "/RGB");
gs.AddOption("DownsampleColorImages", true);
gs.AddOption("DownsampleGrayImages", true);
gs.AddOption("DownsampleMonoImages", true);
// 解像度
var resolution = Parameter.ToValue(setting.Resolution);
var mono = resolution < 300 ? 300 : 1200;
gs.AddOption("ColorImageResolution", resolution);
gs.AddOption("GrayImageResolution", resolution);
gs.AddOption("MonoImageResolution", mono);
// 画像圧縮
gs.AddOption("AutoFilterColorImages", false);
gs.AddOption("AutoFilterGrayImages", false);
gs.AddOption("AutoFilterMonoImages", false);
gs.AddOption("ColorImageFilter", "/" + setting.ImageFilter.ToString());
gs.AddOption("GrayImageFilter", "/" + setting.ImageFilter.ToString());
gs.AddOption("MonoImageFilter", "/" + setting.ImageFilter.ToString());
// ダウンサンプリング
if (setting.DownSampling != Parameter.DownSamplings.None)
{
gs.AddOption("ColorImageDownsampleType", "/" + setting.DownSampling.ToString());
gs.AddOption("GrayImageDownsampleType", "/" + setting.DownSampling.ToString());
gs.AddOption("MonoImageDownsampleType", "/" + setting.DownSampling.ToString());
}
}