/// <summary>
/// Create region block.
/// </summary>
/// <param name="bReduceExtrapolate">This is used to indicate if DWT uses the "Reduce Extrapolate" method.</param>
/// <param name="tileDict">This is used to indicate the dictionary of tile index and encoded data.</param>
/// <param name="tileDataLength">This is used to indicate the encoded tile data length.</param>
/// <param name="tileBlockType">This is used to indicate the tile data block type(simple, first, or upgrade).</param>
public virtual RFX_Progressive_REGION BuildRegionBlock(bool bReduceExtrapolate, Dictionary<TileIndex, EncodedTile> TileDict, uint tileDataLength, RFXProgCodecBlockType tileBlockType)
{
// Create region block data.
byte tfFlag = Convert.ToByte(bReduceExtrapolate);
List<TS_RFX_RECT> tileRectList = new List<TS_RFX_RECT>();
foreach (KeyValuePair<TileIndex, EncodedTile> tilePair in TileDict)
{
TS_RFX_RECT tileRect = new TS_RFX_RECT();
tileRect.x = (ushort)(tilePair.Key.X * RFX_Progressive_CONST.CONTEXT_TILESIZE);
tileRect.y = (ushort)(tilePair.Key.Y * RFX_Progressive_CONST.CONTEXT_TILESIZE);
tileRect.width = tilePair.Key.WidthInSurface;
tileRect.height = tilePair.Key.HeightInSurface;
tileRectList.Add(tileRect);
}
TS_RFX_RECT[] tileRects = tileRectList.ToArray();
EncodedTile[] tileDataArr = TileDict.Values.ToArray();
bool bProg = (tileBlockType == RFXProgCodecBlockType.WBT_TILE_SIMPLE) ? false : true;
RFX_Progressive_REGION region_block = new RFX_Progressive_REGION(bProg, tfFlag, tileDataLength, tileRects, tileDataArr);
return region_block;
}
/// <summary>
/// constructor, create RFX_Progressive_REGION block
/// </summary>
/// <param name="bProg">This is used to indicate if progressive encoding is enabled </param>
/// <param name="flag">This is used to indicate region flag </param>
/// <param name="tileDSize">This is used to indicate total size of all tiles encoded data </param>
/// <param name="regionRects">This is used to indicate region rectangles that all tiles to fill </param>
/// <param name="tileDataArr">This is used to indicate quant data for specific layer </param>
public RFX_Progressive_REGION(bool bProg, byte flag, uint tileDSize, TS_RFX_RECT[] regionRects, EncodedTile[] tileDataArr)
{
this.blockType = RFXProgCodecBlockType.WBT_REGION;
this.blockLen = 6; // common part 6 bytes
this.tileSize = (byte)RFX_Progressive_CONST.CONTEXT_TILESIZE;
this.flags = flag;
this.blockLen += 2;
// Init rect.
this.numRects = (ushort)regionRects.Count();
this.rects = regionRects;
this.blockLen += (uint)(2 + this.numRects * Marshal.SizeOf(this.rects[0]));
// Init quant array.
this.numQuant = (byte)tileDataArr[0].CodecQuantVals.Length; // each tile share same quantity table
this.blockLen += 1;
this.quantVals = tileDataArr[0].CodecQuantVals;
this.blockLen += (uint)(this.numQuant * 5);
if (bProg) // Progressive encoding.
{
this.numProgQuant = 1; // Each tile share same progressive quantity table.
this.blockLen += 1;
this.quantProgVals = new RFX_PROGRESSIVE_CODEC_QUANT[this.numProgQuant];
for (int i = 0; i < this.numProgQuant; i++)
{
this.quantProgVals[i] = tileDataArr[i].ProgCodecQuant;
this.blockLen += (uint)(1 + Marshal.SizeOf(this.quantProgVals[i].yQuantValues) +
Marshal.SizeOf(this.quantProgVals[i].cbQuantValues) +
Marshal.SizeOf(this.quantProgVals[i].crQuantValues));
}
}
else // Non-progressive encoding.
{
this.numProgQuant = 0;
this.blockLen += 1;
this.quantProgVals = null;
}
this.numTiles = (ushort)tileDataArr.Count();
this.tileDataSize = tileDSize;
this.blockLen += (6 + tileDSize);
}
private bool IsInRects(int x, int y, TS_RFX_RECT[] rects)
{
if (rects != null && rects.Length > 0)
{
foreach (TS_RFX_RECT rect in rects)
{
if (IsInRect(x, y, rect))
{
return true;
}
}
return false;
}
return true;
}
private bool IsInRect(int x, int y, TS_RFX_RECT rect)
{
if (x >= rect.x && x < rect.x + rect.width && y >= rect.y && y < rect.y + rect.height)
return true;
return false;
}