/// <summary>
/// Writes a Tile bitmap (44x44) into specified file and returns structure with indexing information.
/// </summary>
/// <param name="stream">Stream where to write to.</param>
/// <param name="bitmap">Bitmap to write. If null, returns invalid IndexData.</param>
/// <returns>IndexData structure with indexing information.</returns>
/// <remarks>It writes only diamond from source image, other is ignored.</remarks>
public static IndexData WriteTile(Stream stream, Bitmap bitmap)
{
if (stream == null)
{
throw new ArgumentNullException("stream");
}
if (bitmap == null)
{
return(IndexData.Empty);
}
// Check bitmap
if (bitmap.Height != 44 || bitmap.Width != 44)
{
throw new ArgumentException("Bitmap has incorrect size. Only allowed is 44x44.", "bitmap");
}
// Create index list
IndexData indexdata = IndexData.Empty;
indexdata.Lookup = (uint)stream.Position;
indexdata.Extra = 0;
BinaryWriter writer = new BinaryWriter(stream);
for (int y = 0; y < 22; y++)
{
int x = 22 - (y + 1);
int lenght = (y + 1) * 2;
for (int i = 0; i < lenght; i++)
{
writer.Write(UOColorConverter.FromColor(bitmap.GetPixel(x + i, y)));
}
}
for (int y = 22; y < 44; y++)
{
int x = y - 22;
int lenght = (44 - y) * 2;
for (int i = 0; i < lenght; i++)
{
writer.Write(UOColorConverter.FromColor(bitmap.GetPixel(x + i, y)));
}
}
indexdata.Lenght = (uint)stream.Position - indexdata.Lookup;
return(indexdata);
}
/// <summary>
/// Writes a run-compressed bitmap into specified file and returns structure with indexing information.
/// </summary>
/// <param name="stream">Stream where to write to.</param>
/// <param name="bitmap">Bitmap to write. If null, returns invalid IndexData.</param>
/// <returns>IndexData structure with indexing information.</returns>
public static IndexData WriteRun(Stream stream, Bitmap bitmap)
{
if (stream == null)
{
throw new ArgumentNullException("stream");
}
if (bitmap == null)
{
return(IndexData.Empty);
}
BinaryWriter writer = new BinaryWriter(stream);
IndexData indexdata = IndexData.Empty;
indexdata.Lookup = (uint)writer.BaseStream.Position;
indexdata.Extra = 0;
short width = (short)bitmap.Width;
short height = (short)bitmap.Height;
writer.Write((int)0); // header, unknown
writer.Write(width);
writer.Write(height);
long lookupTable = writer.BaseStream.Position;
int dataStart = (int)writer.BaseStream.Position + height * 2;
// Skip lookup table
if (writer.BaseStream.Length < dataStart)
{
writer.BaseStream.SetLength(dataStart);
}
writer.Seek(dataStart, SeekOrigin.Begin);
short y = 0;
while (y < height)
{
// Write record to lookup table
int pos = (int)writer.BaseStream.Position;
writer.Seek((int)lookupTable, SeekOrigin.Begin);
writer.Write((short)((pos - dataStart) / 2));
lookupTable = writer.BaseStream.Position;
writer.Seek(pos, SeekOrigin.Begin);
// Write line
int x = 0;
while (x < width)
{
short xOffset = 0;
short xRun = 0;
// Skip invisible pixels
while (x < width && bitmap.GetPixel(x, y).A == 0)
{
xOffset++;
x++;
}
if (x == width)
{
break;
}
// Read list
int xPos = x;
while (xPos < width && bitmap.GetPixel(xPos, y).A != 0)
{
xPos++;
xRun++;
}
// Write chunk header
writer.Write(xOffset);
writer.Write(xRun);
// Write pixel list
while (x < width && bitmap.GetPixel(x, y).A != 0)
{
writer.Write(UOColorConverter.FromColor(bitmap.GetPixel(x, y)));
x++;
}
}
// End line
writer.Write((short)0);
writer.Write((short)0);
y++;
}
indexdata.Lenght = (uint)writer.BaseStream.Position - indexdata.Lookup;
return(indexdata);
}
