Convert(String,String,RasterImageFormat,Int32,Int32,Int32,CodecsImageInfo) Method

RasterCodecsExamples.prototype.ConvertExample = function () {
   Tools.SetLicense();
   with (Leadtools) {
      with (Leadtools.Codecs) {
         var codecs = new RasterCodecs();
         codecs.throwExceptionsOnInvalidImages = false;

         var srcPath = "Assets";
         var destPath = "GifThumbnails";
         var srcFolder;
         var destFolder;
         var destRect;

         return Tools.AppInstallFolder().getFolderAsync(srcPath).then(function (srcFolderX) {
            srcFolder = srcFolderX;

            return Tools.AppLocalFolder().createFolderAsync(destPath, Windows.Storage.CreationCollisionOption.replaceExisting)
         })
            .then(function (destFolderX) {
               destFolder = destFolderX;

               var thumbWidth = 128;
               var thumbHeight = 128;
               destRect = LeadRectHelper.create(0, 0, thumbWidth, thumbHeight);

               // Get the CMP files in this folder
               return srcFolder.getFilesAsync()
            })
            .then(function (files) {
               var promises = files.map(function (loadFile) {
                  return LoadAndConvertAsync(codecs, loadFile, destRect, destPath);
               });

               return WinJS.Promise.join(promises)
            })
            .then(function () {
               // Clean up
               codecs.close();
            });
      }
   }
}

function LoadAndConvertAsync ( codecs, loadFile, destRect, destPath, info    )
{
   var thumbWidth = 128;
   var thumbHeight = 128;
   var rc;
   var info;
   with ( Leadtools ) { with ( Leadtools.Codecs ) { 
      // Make sure that this is a file we can load
      return codecs.getInformationAsync(LeadStreamFactory.create(loadFile), false, 1).then ( function ( infoX ) {
         info = infoX;
         if (info == null || info.format == RasterImageFormat.unknown)
            return ;
         
         // Convert to thumbnails (we want to keep the aspect ratio)
         rc = RasterImage.calculatePaintModeRectangle(
            thumbWidth,
            thumbHeight,
            destRect,
            RasterPaintSizeMode.fitAlways,
            RasterPaintAlignMode.near,
            RasterPaintAlignMode.near);

         // rc.Width and Height contains the image size we want with good aspect ratio
         var name = GetFileNameWithoutExtenstion( loadFile.path);
         var destFileName = destPath + "\\" +  name + "_thumb.gif";

         return Tools.AppLocalFolder().createFileAsync(destFileName, Windows.Storage.CreationCollisionOption.replaceExisting)})
         .then  ( function (  saveFile ) {
            return codecs.convertAsync(LeadStreamFactory.create(loadFile), LeadStreamFactory.create(saveFile), RasterImageFormat.gif, rc.width, rc.height, 8, info)});
   }
   }
}

function GetFileNameWithoutExtenstion(path)
{
   var fileName = path + "";
   var start = fileName.lastIndexOf ( "\\") ;
   var end = fileName.lastIndexOf ( ".") ;
   
   return fileName.substring(start+1, end);
}