// Alea Parallel.For!
internal static Image Render1(Bounds bounds)
{
bounds.AdjustAspectRatio();
var width = bounds.Width;
var height = bounds.Height;
var scale = (bounds.XMax - bounds.XMin) / width;
var resultLength = ColorComponents * width * height;
var resultMemory = Gpu.Default.AllocateDevice <byte>(resultLength);
var resultDevPtr = new deviceptr <byte>(resultMemory.Handle);
Gpu.Default.For(0, width * height, i =>
{
var x = i % width;
var y = i / width;
var offset = ColorComponents * i;
if (offset < resultLength)
{
// ReSharper disable once PossibleLossOfFraction
var c = new Complex
{
Real = bounds.XMin + x * scale,
Imaginary = bounds.YMin + y * scale,
};
ComputeMandelbrotAtOffset(resultDevPtr, c, offset);
}
});
return(BitmapUtility.FromByteArray(Gpu.CopyToHost(resultMemory), width, height));
}
// Custom!
internal static Image Render2(Bounds bounds)
{
bounds.AdjustAspectRatio();
var width = bounds.Width;
var height = bounds.Height;
var scale = (bounds.XMax - bounds.XMin) / width;
var resultLength = ColorComponents * width * height;
var resultMemory = Gpu.Default.AllocateDevice <byte>(resultLength);
var resultDevPtr = new deviceptr <byte>(resultMemory.Handle);
var lp = ComputeLaunchParameters(bounds);
Gpu.Default.Launch(() =>
{
var i = blockDim.x * blockIdx.x + threadIdx.x;
var x = i % width;
var y = i / width;
var offset = ColorComponents * i;
if (offset < resultLength)
{
var c = new Complex
{
Real = bounds.XMin + x * scale,
Imaginary = bounds.YMin + y * scale,
};
ComputeMandelbrotAtOffset(resultDevPtr, c, offset);
}
}, lp);
return(BitmapUtility.FromByteArray(Gpu.CopyToHost(resultMemory), width, height));
}
// Byte Array!
internal static Image Render2(Bounds bounds)
{
bounds.AdjustAspectRatio();
var width = bounds.Width;
var height = bounds.Height;
var scale = (bounds.XMax - bounds.XMin) / width;
var result = new byte[ColorComponents * width * height];
Parallel.For(0, height, y =>
{
for (var x = 0; x < width; ++x)
{
var c = new Complex(bounds.XMin + x * scale, bounds.YMin + y * scale);
ComputeMandelbrotAtOffset(c, i =>
{
// ReSharper disable once AccessToModifiedClosure
var offset = ColorComponents * (y * width + x);
result[offset + 0] = i;
result[offset + 1] = i;
result[offset + 2] = i;
});
}
});
return(BitmapUtility.FromByteArray(result, width, height));
}
