public unsafe void Copy_Compressed_Array(bool separateLayerCopies)
{
PixelFormat format = PixelFormat.BC3_UNorm;
if (!GD.GetPixelFormatSupport(format, TextureType.Texture2D, TextureUsage.Sampled))
{
return;
}
TextureDescription texDesc = TextureDescription.Texture2D(
16, 16,
1, 4,
format,
TextureUsage.Sampled);
Texture copySrc = RF.CreateTexture(texDesc);
texDesc.Usage = TextureUsage.Staging;
Texture copyDst = RF.CreateTexture(texDesc);
for (uint layer = 0; layer < copySrc.ArrayLayers; layer++)
{
int byteCount = 16 * 16;
byte[] data = Enumerable.Range(0, byteCount).Select(i => (byte)(i + layer)).ToArray();
GD.UpdateTexture(
copySrc,
data,
0, 0, 0,
16, 16, 1,
0, layer);
}
CommandList copyCL = RF.CreateCommandList();
copyCL.Begin();
if (separateLayerCopies)
{
for (uint layer = 0; layer < copySrc.ArrayLayers; layer++)
{
copyCL.CopyTexture(copySrc, 0, 0, 0, 0, layer, copyDst, 0, 0, 0, 0, layer, 16, 16, 1, 1);
}
}
else
{
copyCL.CopyTexture(copySrc, 0, 0, 0, 0, 0, copyDst, 0, 0, 0, 0, 0, 16, 16, 1, copySrc.ArrayLayers);
}
copyCL.End();
Fence fence = RF.CreateFence(false);
GD.SubmitCommands(copyCL, fence);
GD.WaitForFence(fence);
for (uint layer = 0; layer < copyDst.ArrayLayers; layer++)
{
MappedResource map = GD.Map(copyDst, MapMode.Read, layer);
byte * basePtr = (byte *)map.Data;
int index = 0;
uint rowSize = 64;
uint numRows = 4;
for (uint row = 0; row < numRows; row++)
{
byte *rowBase = basePtr + (row * map.RowPitch);
for (uint x = 0; x < rowSize; x++)
{
Assert.Equal((byte)(index + layer), rowBase[x]);
index += 1;
}
}
GD.Unmap(copyDst, layer);
}
}