/// <summary>
/// Get the different tiles of this surface
/// </summary>
/// <param name="bRgb">If true, check if Rgb data exist for specified frame; otherwise, check if Dwt data exist.</param>
/// <returns>The array of different tiles.</returns>
public TileIndex[] GetDiffIndexes(bool bRgb)
{
if (this.pendingUpdateIndexs != null && this.pendingUpdateIndexs.Length <= RdpegfxTileUtils.TileDiffMinCount)
{
return(this.pendingUpdateIndexs);
}
if (CurrentFrame == null)
{
return(null);
}
if (LastFrame == null)
{
return(this.pendingUpdateIndexs);
}
List <TileIndex> diffIndexList = new List <TileIndex>();
for (int xIndex = 0; xIndex *RdpegfxTileUtils.TileSize < this.Width; xIndex++)
{
for (int yIndex = 0; yIndex *RdpegfxTileUtils.TileSize < this.Height; yIndex++)
{
TileIndex tIndex = new TileIndex((ushort)xIndex, (ushort)yIndex, this.Width, this.Height);
if (CurrentFrame.IsIndexInScope(tIndex, bRgb))
{
//diffIndexList.Add(tIndex);
if (LastFrame != null && LastFrame.IsIndexInScope(tIndex, bRgb))
{
if (bRgb)
{
RgbTile prvRgb = LastFrame.GetRgbTile(tIndex);
RgbTile curRgb = CurrentFrame.GetRgbTile(tIndex);
if (!curRgb.EqualsWith(prvRgb))
{
diffIndexList.Add(tIndex);
}
}
else
{
DwtTile prvDwt = LastFrame.GetDwt(tIndex);
DwtTile curDwt = CurrentFrame.GetDwt(tIndex);
if (!curDwt.EqualsWith(prvDwt))
{
diffIndexList.Add(tIndex);
}
}
}
else
{
diffIndexList.Add(tIndex);
}
}
}
}
return(diffIndexList.ToArray());
}
