/// <summary>
/// Initializes a new instance of the <see cref="FastBufferManager"/> class.
/// </summary>
/// <param name="maxBufferPoolSize">The maximum size of the pooled buffers.</param>
/// <param name="bufferSize">The size of the each buffer.</param>
/// <param name="allocate">If set to <c>true</c> all buffers will be allocated.</param>
public FastBufferManager(int maxBufferPoolSize, int bufferSize, bool allocate)
{
if (maxBufferPoolSize < bufferSize)
{
throw new ArgumentOutOfRangeException("maxBufferPoolSize");
}
if (bufferSize <= 0)
{
throw new ArgumentOutOfRangeException("bufferSize");
}
_maxBuffers = ((maxBufferPoolSize - 1 + bufferSize) / bufferSize) / Decongest;
_bufferSize = bufferSize;
_buffers = new CpuBuffer[Decongest];
for (var i = 0; i < Decongest; i++)
{
_buffers[i] = new CpuBuffer(_maxBuffers, bufferSize, allocate);
}
}
public void ClooExecuteHistogramN()
{
var gpuHist = new ClooBuffer<uint>(Context, Cloo.ComputeMemoryFlags.ReadWrite | ComputeMemoryFlags.AllocateHostPointer, 64);
var cpuHist = new CpuBuffer<uint>(64);
var gpuImage = CreateClooImageByteRgbA(100, 100);
ClooImaging.HistogramN(Queue, gpuImage, gpuHist, 4);
gpuHist.ReadFromDevice(Queue);
// compare GPU histogram with CPU version
CpuImaging.HistogramN(gpuImage, cpuHist, 4);
Assert.AreNotEqual(0, cpuHist.HostBuffer.Sum(x => x));
Assert.AreEqual(cpuHist.HostBuffer.Sum(x => x), gpuHist.HostBuffer.Sum(x => x));
// check each value
for (int i = 0; i < cpuHist.HostBuffer.Length; i++)
Assert.AreEqual(cpuHist.HostBuffer[i], gpuHist.HostBuffer[i], "Histogram comparison failed at index " + i);
}
/// <summary>
/// Creates a ClooBuffer and fills it with random values
/// </summary>
/// <param name="length">buffer length</param>
/// <returns></returns>
public virtual CpuBuffer<uint> CreateCpuBufferUInt(int length = 9999)
{
ResetRandomSeed();
var buffer = new CpuBuffer<uint>(length);
Assert.AreNotEqual(0, buffer.HostBuffer.Length);
Assert.AreEqual(4 * buffer.HostBuffer.Length, buffer.Size);
for (int i = 0; i < length; i++)
buffer.HostBuffer[i] = (uint)Random.Next(256);
Assert.AreNotEqual(0, buffer.HostBuffer.Sum(x => x));
return buffer;
}
