/// <summary>
/// Gets data from the host GPU.
/// </summary>
/// <remarks>
/// This method should be used to retrieve data that was modified by the host GPU.
/// This is not cheap, avoid doing that unless strictly needed.
/// </remarks>
/// <returns>Host texture data</returns>
private Span <byte> GetTextureDataFromGpu(bool blacklist, ITexture texture = null)
{
Span <byte> data;
if (texture != null)
{
data = texture.GetData();
}
else
{
if (blacklist)
{
BlacklistScale();
data = HostTexture.GetData();
}
else if (ScaleFactor != 1f)
{
float scale = ScaleFactor;
SetScale(1f);
data = HostTexture.GetData();
SetScale(scale);
}
else
{
data = HostTexture.GetData();
}
}
if (Info.IsLinear)
{
data = LayoutConverter.ConvertLinearToLinearStrided(
Info.Width,
Info.Height,
Info.FormatInfo.BlockWidth,
Info.FormatInfo.BlockHeight,
Info.Stride,
Info.FormatInfo.BytesPerPixel,
data);
}
else
{
data = LayoutConverter.ConvertLinearToBlockLinear(
Info.Width,
Info.Height,
_depth,
Info.Levels,
_layers,
Info.FormatInfo.BlockWidth,
Info.FormatInfo.BlockHeight,
Info.FormatInfo.BytesPerPixel,
Info.GobBlocksInY,
Info.GobBlocksInZ,
Info.GobBlocksInTileX,
_sizeInfo,
data);
}
return(data);
}
public ReadOnlySpan <byte> GetData()
{
if (_renderer.IsGpuThread())
{
ResultBox <PinnedSpan <byte> > box = new ResultBox <PinnedSpan <byte> >();
_renderer.New <TextureGetDataCommand>().Set(Ref(this), Ref(box));
_renderer.InvokeCommand();
return(box.Result.Get());
}
else
{
ThreadedHelpers.SpinUntilNonNull(ref Base);
return(Base.GetData());
}
}
public void CreateBuffer()
{
if (data != null)
{
return;
}
if (texture == null)
{
data = new byte[4 * Size.Width * Size.Height];
}
else
{
data = texture.GetData();
}
releaseBufferOnCommit = false;
}
