public static SampledImage LoadFromFile(string fileName)
{
SampledImage sampledImage = new SampledImage();
using (StreamReader reader = new StreamReader(fileName))
{
try
{
sampledImage.Width = Int32.Parse(reader.ReadLine());
sampledImage.Height = Int32.Parse(reader.ReadLine());
string line = reader.ReadLine();
while ((line != null) && (line.Length != 0))
{
string[] sampleFields = line.Split(new char[] { ' ' }, 3);
int x = Int32.Parse(sampleFields[0]);
int y = Int32.Parse(sampleFields[1]);
int argb = Int32.Parse(sampleFields[2]);
Color color = Color.FromArgb(argb);
sampledImage.AddSample(new ImageSample(x, y, color));
line = reader.ReadLine();
}
}
catch (FormatException ex)
{
Console.Error.WriteLine(ex.Message);
return null;
}
}
return sampledImage;
}
protected int GenerateCluster(Bitmap image, int sampleCount, SampledImage sampledImage, int samplePercent, int percentDone, int maxIterations)
{
for (int i = 0; (sampledImage.Samples.Count < sampleCount) && (i < maxIterations); i++)
{
int x;
int y;
if (!Next2DWithinImage(out x, out y))
{
continue;
}
Color color;
if (canReadImageDirectly)
{
// faster, only for BGR or BGRA
unsafe
{
byte* imagePtr = imagePtrBase + (y * imageData.Stride) + x * bands;
byte b = imagePtr[0];
byte g = imagePtr[1];
byte r = imagePtr[2];
byte a = 255;
if (hasAlpha)
{
a = imagePtr[3];
}
color = Color.FromArgb(a, r, g, b);
}
}
else
{
// slower, more general
color = image.GetPixel(x, y);
}
sampledImage.AddSample(new ImageSample(x, y, color));
if ((samplePercent > 500) && (sampledImage.Samples.Count % samplePercent == 0))
{
percentDone++;
Progress.ReportProgress(percentDone);
}
}
return percentDone;
}