CS 312 (W'07, T Th sections)

It appears you've left out the DirectBitmapWriter.cs file, which is a dependency for GrayBitmap.

any news on a DirectBitmapWriter yet?
i'm also erroring on "frmMain.SegmentPointRegex" in GrayBitmap line148. i assume frmMain is the main form....but what is the SegmentPointRegex business?......maybe i need to understand this stuff better..

Oops. I have posted a copy of DirectBitmapWriter.cs.

Mike.

The SegmentPointRegex is defined like this:

public static readonly string SegmentPointRegex = @"\((\d+), *(\d+)\)";

When Dr. Jones fixes the link to the distribution on this page, visit that link for what will likely be an intact distribution that has all the latest optimizations, without any missing stuff.

Andrew's optimized code works GREAT, but it took me a while to figure out how "ProgressCallback"s worked, so I thought I'd share, for anyone else who might get hung up on it. Basically just create a method in the same class where you will be needing a "ProgressCallback" (such as in Form1) with a void return type and one argument of type integer. Next, give the name of that funcion as the "ProgressCallback" parameter to GrayBitmap.Load, GrayBitmap.GenerateGradientBitmap, etc. Example:



// My ProgressCallback Method

void refreshPercent(int percent)

{

  statusText.Clear();

  statusText.AppendText("Progress: " + percent.ToString() + '%' + Environment.NewLine);

}



...



  // To open a file

  FileStream fs = new FileStream(filename, FileMode.Open, FileAccess.Read);

  string segPts;

  image.Load(fs, out segPts, refreshPercent);



...



  // To QUICKLY create the gradient view in Form1! (Woohoo!)

  image.Gradient.GenerateGradientBitmap(refreshPercent);

  gradientView.Image = image.Gradient.Bitmap;



Or, to make the above run approximately 140% faster, just leave the "refreshPercent" method empty, and it wont output anything to the log. Hope that helps someone.

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