public static void LoadSurfaceFromVolumeSlice(VolumeTexture volumeTex, int mip, int slice, Filter filter, Surface surface)
{
VolumeDescription vd = volumeTex.GetLevelDescription(mip);
OpsFormatHelper formatHelp = OpsFormatHelper.FindByFormat(vd.Format);
Texture sliceTex = new Texture(volumeTex.Device, vd.Width, vd.Height, 1, Usage.None, formatHelp.Format, Pool.SystemMemory);
Box box = new Box();
box.Left = 0;
box.Right = vd.Width;
box.Top = 0;
box.Bottom = vd.Height;
box.Front = slice;
box.Back = slice + 1;
LockedBox volumeLB;
GraphicsStream volumeData = volumeTex.LockBox(0, box, LockFlags.ReadOnly, out volumeLB);
int slicePitch;
GraphicsStream sliceData = sliceTex.LockRectangle(mip, LockFlags.None, out slicePitch);
CopyTextureData(volumeData, vd.Width, vd.Height, formatHelp, volumeLB.RowPitch, sliceData, slicePitch);
sliceTex.UnlockRectangle(0);
volumeTex.UnlockBox(mip);
SurfaceLoader.FromSurface(surface, sliceTex.GetSurfaceLevel(0), filter, 0);
sliceTex.Dispose();
}
private static void CopyTextureData(GraphicsStream srcData, int srcWidth, int srcHeight, OpsFormatHelper formatHelp, int srcPitch, GraphicsStream dstData, int dstPitch)
{
Byte[] rowData = new Byte[srcWidth * formatHelp.SizeInBytes];
for (int row = 0; row < srcHeight; row++)
{
srcData.Position = row * srcPitch;
dstData.Position = row * dstPitch;
srcData.Read(rowData, 0, rowData.Length);
dstData.Write(rowData, 0, rowData.Length);
}
}
private static void CopyTextureData(GraphicsStream srcData, int srcWidth, int srcHeight, OpsFormatHelper formatHelp, int srcPitch, GraphicsStream dstData, int dstPitch)
{
Byte[] rowData = new Byte[srcWidth * formatHelp.SizeInBytes];
for (int row = 0; row < srcHeight; row++)
{
srcData.Position = row * srcPitch;
dstData.Position = row * dstPitch;
srcData.Read(rowData, 0, rowData.Length);
dstData.Write(rowData, 0, rowData.Length);
}
}
