public unsafe void Allocate_ReadBackTexture2D_Copy_Range(Device device, int x, int y, int width, int height)
{
int[,] source = new int[2048, 2048];
fixed(int *p = source)
{
new Random(42).NextBytes(new Span <int>(p, source.Length).AsBytes());
}
using ReadOnlyTexture2D <int> readOnlyTexture2D = device.Get().AllocateReadOnlyTexture2D(source);
using ReadBackTexture2D <int> readBackTexture2D = device.Get().AllocateReadBackTexture2D <int>(2048, 2048);
readOnlyTexture2D.CopyTo(readBackTexture2D, x, y, width, height);
fixed(int *p = source)
{
for (int i = 0; i < height; i++)
{
Span <int> sourceRow = new Span <int>(Unsafe.AsPointer(ref source[i + y, 0]), source.GetLength(1)).Slice(x, width);
Span <int> destinationRow = readBackTexture2D.View.GetRowSpan(i).Slice(0, width);
Assert.IsTrue(sourceRow.SequenceEqual(destinationRow));
}
}
}
public unsafe void Allocate_ReadBackTexture2D_Copy_Full(Device device)
{
int[,] source = new int[256, 256];
fixed(int *p = source)
{
new Random(42).NextBytes(new Span <int>(p, source.Length).AsBytes());
}
using ReadOnlyTexture2D <int> readOnlyTexture2D = device.Get().AllocateReadOnlyTexture2D(source);
using ReadBackTexture2D <int> readBackTexture2D = device.Get().AllocateReadBackTexture2D <int>(256, 256);
readOnlyTexture2D.CopyTo(readBackTexture2D);
Assert.AreEqual(readBackTexture2D.Width, 256);
Assert.AreEqual(readBackTexture2D.Height, 256);
fixed(int *p = source)
{
for (int i = 0; i < readBackTexture2D.Height; i++)
{
Assert.IsTrue(readBackTexture2D.View.GetRowSpan(i).SequenceEqual(new Span <int>(Unsafe.AsPointer(ref source[i, 0]), source.GetLength(1))));
}
}
}
public void Allocate_ReadBackTexture2D_Copy_Range(Device device, int x, int y, int width, int height)
{
int[,] source = new int[2048, 2048];
for (int i = 0; i < 2048; i++)
{
new Random(42).NextBytes(source.GetRowSpan(i).AsBytes());
}
using ReadOnlyTexture2D <int> readOnlyTexture2D = device.Get().AllocateReadOnlyTexture2D(source);
using ReadBackTexture2D <int> readBackTexture2D = device.Get().AllocateReadBackTexture2D <int>(2048, 2048);
readOnlyTexture2D.CopyTo(readBackTexture2D, x, y, width, height);
for (int i = 0; i < height; i++)
{
Span <int> sourceRow = source.GetRowSpan(i + y).Slice(x, width);
Span <int> destinationRow = readBackTexture2D.View.GetRowSpan(i).Slice(0, width);
Assert.IsTrue(sourceRow.SequenceEqual(destinationRow));
}
}
public void Allocate_ReadBackTexture2D_Copy_Full(Device device)
{
int[,] source = new int[256, 256];
for (int i = 0; i < 256; i++)
{
new Random(42).NextBytes(source.GetRowSpan(i).AsBytes());
}
using ReadOnlyTexture2D <int> readOnlyTexture2D = device.Get().AllocateReadOnlyTexture2D(source);
using ReadBackTexture2D <int> readBackTexture2D = device.Get().AllocateReadBackTexture2D <int>(256, 256);
readOnlyTexture2D.CopyTo(readBackTexture2D);
Assert.AreEqual(readBackTexture2D.Width, 256);
Assert.AreEqual(readBackTexture2D.Height, 256);
for (int i = 0; i < readBackTexture2D.Height; i++)
{
Assert.IsTrue(readBackTexture2D.View.GetRowSpan(i).SequenceEqual(source.GetRowSpan(i)));
}
}