/// <summary>
/// Read a CSD and get its document guid
/// </summary>
/// <param name="fileName"></param>
/// <returns></returns>
public static Guid GetGuidFromCsd(String fileName)
{
Guid ret = Guid.Empty;
SlideViewer.CSDDocument document = null;
BinaryFormatter binaryFormatter = new BinaryFormatter();
FileStream stream = null;
try
{
stream = new FileStream(fileName, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
document = (SlideViewer.CSDDocument)binaryFormatter.Deserialize(stream);
ret = document.Identifier;
}
catch
{
Debug.WriteLine("Failed to read: " + fileName);
}
finally
{
stream.Close();
}
return(ret);
}
/// <summary>
/// Save the given presentation to the given file name.
/// </summary>
/// <param name="presentation">non-null presentation to save</param>
/// <param name="fileName">non-null, writable filename</param>
/// <remarks>may throw any of the same exceptions that File.Create throws</remarks>
public void SavePresentation(PowerPoint.Presentation presentation, string fileName)
{
// TODO: error handling
System.IO.Stream stream = System.IO.File.Create(fileName);
IFormatter formatter = new BinaryFormatter();
SlideViewer.SlideDeck sd = this.MakeSlideDeck(presentation, fileName);
SlideViewer.CSDDocument csd = new SlideViewer.CSDDocument();
csd.SetInfo(sd);
formatter.Serialize(stream, csd);
stream.Close();
}
/// <summary>
/// Open a CSD and create a directory of jpg images, one per slide.
/// </summary>
/// <param name="g"></param>
/// <param name="file"></param>
private void processCsd(Guid g, FileInfo file)
{
if (stopNow)
{
return;
}
String tempDirName = Utility.GetTempDir();
SlideViewer.CSDDocument document = null;
BinaryFormatter binaryFormatter = new BinaryFormatter();
FileStream stream = null;
try
{
stream = new FileStream(file.FullName, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
document = (SlideViewer.CSDDocument)binaryFormatter.Deserialize(stream);
}
catch (Exception e)
{
Debug.WriteLine("Failed to read: " + file.FullName + "; exception text: " + e.ToString());
log.WriteLine("Error: Failed to read file: " + file.FullName +
". Possibly the file was produced with an unsupported version of Classroom Presenter. Exception text: " +
e.ToString());
log.ErrorLevel = 5;
}
finally
{
stream.Close();
}
if (document == null)
{
return;
}
if (document.DocumentType != "Presentation")
{
log.WriteLine("Error: Document type is not Presentation: " + file.FullName);
log.ErrorLevel = 3;
progressTracker.CurrentValue += 100;
return;
}
Directory.CreateDirectory(tempDirName);
int pageNum = 1;
int ptStart = progressTracker.CurrentValue;
foreach (SlideViewer.SlideDocument page in document.Pages)
{
if (stopNow)
{
break;
}
// SlideMode images may be any or all of Student, Instructor, Shared, Default..
// I think we prefer Default, but will also take Shared.
if (page.slideImages.Count > 0)
{
object o = null;
foreach (String s in page.slideImages.Keys)
{
if (s == "Default")
{
o = page.slideImages[s];
break;
}
else if ((s == "Shared") && (o == null))
{
o = page.slideImages[s];
}
}
//The image may be SerializableImage or just Image, the former for EMF.
if (o != null)
{
Image img = null;
if (o is SlideViewer.SerializableImage)
{
SlideViewer.SerializableImage si = (SlideViewer.SerializableImage)o;
img = si.image;
}
else if (o is System.Drawing.Image)
{
img = (Image)o;
}
else
{
log.WriteLine("Error: Unrecognized image type in deck: " + file.FullName);
log.ErrorLevel = 5;
}
if (img != null)
{
String outfile = Path.Combine(tempDirName, "slide" + pageNum.ToString() + ".jpg");
//The images in EMF format are rather huge.. scale them down.
if (img.Size.Width > 1600)
{
Image img2 = new Bitmap(img, new Size(960, 720));
img2.Save(outfile, ImageFormat.Jpeg);
//PRI2: the scaled images tend to look like crap. Fix?
// try converting to wmf, then to jpg?
//this.SaveWithQuality(outfile,img2,100); //<-- no help
img2.Dispose();
log.WriteLine("Warning: Slide " + pageNum.ToString() + " was scaled. " +
"For better results, use a CSD that was created with WMF format, or specify the " +
"original PPT file.");
log.ErrorLevel = 3;
}
else
{
img.Save(outfile, System.Drawing.Imaging.ImageFormat.Jpeg);
}
img.Dispose();
}
}
}
progressTracker.CurrentValue = ((pageNum * 100) / document.Pages.Length) + ptStart;
pageNum++;
}
log.WriteLine("Processed " + (pageNum - 1).ToString() + " pages for " + file.FullName);
outputDirs.Add(g, tempDirName);
}
