/// <summary>指定されたエクセルブックファイルに含まれる画像を圧縮します。</summary>
/// <param name="sourceFilePath">ファイルパス</param>
/// <param name="targetInnerPath">処理対象内部パス</param>
internal void QuantFromZipFile(string sourceFilePath, string targetInnerPath = "")
{
string reg = this.IsConvertToPng ? @"{0}.*\.png|{0}.*\.jpeg|{0}.*\.jpg|{0}.*\.bmp" : @"{0}.*\.png";
reg = string.Format(reg, targetInnerPath);
Regex regex = new Regex(reg);
Console.WriteLine("減色を開始します：{0}", sourceFilePath);
string distinationFileName = Path.GetFileNameWithoutExtension(sourceFilePath) + ".zip";
string.Format(Properties.Settings.Default.FileNameTemplate, distinationFileName);
string distinationFilePath = Path.GetDirectoryName(sourceFilePath);
distinationFilePath = Path.Combine(distinationFilePath, distinationFileName);
this.OutputFilePath = distinationFilePath;
using (RarArchive archive = RarArchive.Open(sourceFilePath))
using (ZipArchive distArchive = new ZipArchive(new FileStream(distinationFilePath, FileMode.Create, FileAccess.Write), ZipArchiveMode.Create))
using (PngQuant pngquant = new PngQuant())
{
foreach (RarArchiveEntry entry in archive.Entries)
{
if (regex.IsMatch(entry.Key.ToLower()) == false)
{
ZipArchiveEntry distEntry = distArchive.CreateEntry(entry.Key);
using (Stream srcStream = entry.OpenEntryStream())
using (Stream distStream = distEntry.Open())
{
srcStream.CopyTo(distStream);
}
continue;
}
// 解凍して一時ファイルを作成し、減色する
Stream tranStream;
using (Stream s = entry.OpenEntryStream())
{
tranStream = pngquant.Subtractive(s);
}
// 減色したファイルをブックに再設定
string distEntryName = PathUtils.ChangeExtension(entry.Key, ".png");
var e = distArchive.CreateEntry(distEntryName, CompressionLevel.NoCompression);
using (var stream = e.Open())
{
tranStream.CopyTo(stream);
}
Console.WriteLine("・{0}", entry.Key);
// 変換イベントを発生させる
this.FileNameChanged?.Invoke(this, new FileNameChangedEventArgs(entry.Key, distEntryName));
}
}
}
public PngQuantTransformer(PngQuantOptions options = null)
{
_pngquant = new PngQuant(options);
}
