public void GroupedIndex2EntryPoint(int length)
{
var end = (int)Math.Sqrt(Accelerator.MaxNumThreadsPerGroup);
for (int i = 1; i <= end; i <<= 1)
{
var stride = new Index2(i, i);
var extent = new KernelConfig(
new Index2(length, length),
stride);
using var buffer = Accelerator.Allocate <int>(extent.Size);
buffer.MemSetToZero(Accelerator.DefaultStream);
Execute(extent, buffer.View, stride, extent.GridDim.XY);
var expected = new int[extent.Size];
for (int j = 0; j < length * length; ++j)
{
var gridIdx = Index2.ReconstructIndex(j, extent.GridDim.XY);
for (int k = 0; k < i * i; ++k)
{
var groupIdx = Index2.ReconstructIndex(k, extent.GroupDim.XY);
var idx = (gridIdx * stride + groupIdx).ComputeLinearIndex(extent.GridDim.XY);
expected[idx] = idx;
}
}
Verify(buffer, expected);
}
}
5, 6_000)] // Make sure linearIndices > int.MaxValue work.
public void ReconstructIndex2(
long linearIndex, int dimX, int dimY,
int expectedX, int expectedY)
{
var index = Index2.ReconstructIndex(linearIndex, new Index2(dimX, dimY));
Assert.Equal(expectedX, index.X);
Assert.Equal(expectedY, index.Y);
}
public static void PerformShading(Index index, ArrayView <Rgba32> image, Rgba32 frameColor, int radius, Size size)
{
int circleCentreX = size.Width / 2;
int circleCentreY = size.Height / 2;
var point = Index2.ReconstructIndex(index.X, new Index2(size.Width, size.Height));
if (((point.X - circleCentreX) * (point.X - circleCentreX) + (point.Y - circleCentreY) * (point.Y - circleCentreY)) > radius * radius)
{
image[(point.Y * size.Width) + point.X] = frameColor;
}
}
private static Index2 Reconstruct2DIndex(Index2 totalDim, int linearIndex) => totalDim.ReconstructIndex(linearIndex);
