public static LayerData ToLayerMessage(List <LayerPatch> patches, LayerData.LayerDataType type, int offset, int length, out int outlength)
{
outlength = 0;
var layer = new LayerData
{
LayerType = type
};
bool extended = false;
switch (type)
{
case LayerData.LayerDataType.CloudExtended:
case LayerData.LayerDataType.LandExtended:
case LayerData.LayerDataType.WaterExtended:
case LayerData.LayerDataType.WindExtended:
extended = true;
break;
}
var header = new GroupHeader
{
Stride = STRIDE,
PatchSize = LAYER_PATCH_NUM_XY_ENTRIES,
Type = type
};
var data = new byte[1500];
var bitpack = new BitPacker(data, 0);
bitpack.PackBits(header.Stride, 16);
bitpack.PackBits(header.PatchSize, 8);
bitpack.PackBits((uint)header.Type, 8);
int remainingbits = 1300 * 8; /* 1300 is a bit more than 2 perfectly bad compressed layer patches, wind needs two per packet */
for (int i = 0; i < length; i++)
{
int patchno = i + offset;
if (patches[patchno].Data.Length != LAYER_PATCH_NUM_XY_ENTRIES * LAYER_PATCH_NUM_XY_ENTRIES)
{
throw new ArgumentException("Patch data must be a 16x16 array");
}
if (CompressPatch(bitpack, patches[patchno], extended, ref remainingbits))
{
++outlength;
}
else
{
break;
}
}
bitpack.PackBits(END_OF_PATCHES, 8);
layer.Data = new byte[bitpack.NumBytes];
Buffer.BlockCopy(bitpack.Data, 0, layer.Data, 0, bitpack.NumBytes);
return(layer);
}
public static LayerData ToLayerMessage(List <LayerPatch> patches, LayerData.LayerDataType type)
{
int outlength;
return(ToLayerMessage(patches, type, 0, patches.Count, out outlength));
}
