private void GrayFilterThread(object parameter)
{
GrayFilterThreadParameter input = parameter as GrayFilterThreadParameter;
if (input == null)
{
throw new ArgumentException("Неправильный формат параметра потока");
}
var grayResult = input.Result;
var data = input.Data;
int delta = input.Stride / Width;
for (int y = input.From; y < input.To; ++y)
{
int offset = y * input.Stride;
for (int x = 0; x < Width; ++x)
{
int index = offset + x * delta;
byte color = (byte)((data[index] + data[index + 1] + data[index + 2]) / 3);
grayResult[x, y] = color;
}
}
input.ResetEvent.Set();
}
private byte[,] GrayFilter(byte[] data, int stride)
{
var grayResult = new byte[width, height];
int threadCount = Environment.ProcessorCount;
int threadPart = height / threadCount;
var resetEvents = new ManualResetEvent[threadCount];
var threadParameters = new GrayFilterThreadParameter[threadCount];
for (int i = 0; i < threadCount; ++i)
{
resetEvents[i] = new ManualResetEvent(false);
threadParameters[i] = new GrayFilterThreadParameter(
data, grayResult, stride,
threadPart * i,
((i + 1) < threadCount) ? (threadPart * (i + 1)) : (height),
resetEvents[i]);
ThreadPool.QueueUserWorkItem(new WaitCallback(GrayFilterThread), threadParameters[i]);
}
WaitHandle.WaitAll(resetEvents);
return(grayResult);
}
private byte[,] GrayFilter(byte[] data, int stride)
{
var grayResult = new byte[width, height];
int threadCount = Environment.ProcessorCount;
int threadPart = height / threadCount;
var resetEvents = new ManualResetEvent[threadCount];
var threadParameters = new GrayFilterThreadParameter[threadCount];
for (int i = 0; i < threadCount; ++i)
{
resetEvents[i] = new ManualResetEvent(false);
threadParameters[i] = new GrayFilterThreadParameter(
data, grayResult, stride,
threadPart * i,
((i + 1) < threadCount) ? (threadPart * (i + 1)) : (height),
resetEvents[i]);
ThreadPool.QueueUserWorkItem(new WaitCallback(GrayFilterThread), threadParameters[i]);
}
WaitHandle.WaitAll(resetEvents);
return grayResult;
}