// Fixed Block Size!
internal static Image Render3(Bitmap image, ConvolutionFilter filter)
{
var gpu = Gpu.Default;
var width = image.Width;
var array = BitmapUtility.ToColorArray(image);
var mFilter = filter.Filter;
var mFactor = filter.Factor;
var mOffset = filter.Offset;
var inputMemory = gpu.ArrayGetMemory(array, true, false);
var inputDevPtr = new deviceptr <ColorRaw>(inputMemory.Handle);
var resultLength = array.Length;
var resultMemory = Gpu.Default.AllocateDevice <ColorRaw>(resultLength);
var resultDevPtr = new deviceptr <ColorRaw>(resultMemory.Handle);
var lp = new LaunchParam(256, 256);
gpu.Launch(() =>
{
var i = blockDim.x * blockIdx.x + threadIdx.x;
while (i < resultLength)
{
ComputeEdgeDetectFilter0AtOffsetNapron(inputDevPtr, resultDevPtr, resultLength, mFilter, mFactor, mOffset, i, width);
i += blockDim.x * gridDim.x;
}
}, lp);
return(BitmapUtility.FromColorArray(Gpu.CopyToHost(resultMemory), image.Width, image.Height));
}
// Alea Parallel.For!
internal static Image Render1(Bitmap image, ConvolutionFilter filter)
{
var gpu = Gpu.Default;
var width = image.Width;
var array = BitmapUtility.ToColorArray(image);
var mFilter = filter.Filter;
var mFactor = filter.Factor;
var mOffset = filter.Offset;
var inputMemory = gpu.ArrayGetMemory(array, true, false);
var inputDevPtr = new deviceptr <ColorRaw>(inputMemory.Handle);
var resultLength = array.Length;
var resultMemory = Gpu.Default.AllocateDevice <ColorRaw>(resultLength);
var resultDevPtr = new deviceptr <ColorRaw>(resultMemory.Handle);
gpu.For(0, resultLength, i =>
{
if (i < resultLength)
{
ComputeEdgeDetectFilter0AtOffsetNapron(inputDevPtr, resultDevPtr, resultLength, mFilter, mFactor, mOffset, i, width);
}
});
return(BitmapUtility.FromColorArray(Gpu.CopyToHost(resultMemory), image.Width, image.Height));
}
// Custom Array!
internal static Image Render2(Bitmap image, ConvolutionFilter filter)
{
var width = image.Width;
var height = image.Height;
var source = BitmapUtility.ToColorArray(image);
var result = new ColorRaw[width * height];
Parallel.For(0, height, y =>
{
for (var x = 0; x < width; ++x)
{
var offset = y * width + x;
var neighbours = GetNeighbours(x, y, width, height, (nx, ny, i) => (nx >= 0 && nx < width && ny >= 0 && ny < height) == false
? ColorRaw.FromRgb(0, 0, 0)
: source[i]);
result[offset] = filter.Compute(neighbours);
}
});
return(BitmapUtility.FromColorArray(result, image.Width, image.Height));
}