public void ToSwf(SwfWriter w)
{
uint start = (uint)w.Position;
w.AppendTagIDAndLength(this.TagType, 0, true);
w.AppendUI16(CharacterId);
w.AppendByte((byte)BitmapFormat);
w.AppendUI16(Width);
w.AppendUI16(Height);
if (BitmapFormat == BitmapFormat.Colormapped8Bit) // 8-bit colormapped image
{
w.AppendByte((byte)(ColorCount - 1));
uint colorBytes = HasAlpha ? (uint)4 : (uint)3;
uint padWidth = this.Width + (4 - (this.Width % 4));
uint unzippedSize = (this.ColorCount * colorBytes) + (padWidth * this.Height);
byte[] mapData = new byte[unzippedSize];
for (int i = 0; i < this.ColorCount; i++)
{
mapData[i * colorBytes + 0] = ColorTable[i].R;
mapData[i * colorBytes + 1] = ColorTable[i].G;
mapData[i * colorBytes + 2] = ColorTable[i].B;
if (HasAlpha)
{
mapData[i * colorBytes + 3] = ColorTable[i].A;
}
}
int index = 0;
int st = (int)(this.ColorCount * colorBytes);
for (int i = st; i < unzippedSize; i++)
{
if (((i - st) % padWidth) < this.Width)// exclude padding
{
mapData[i] = (byte)this.ColorData[index++];
}
else
{
mapData[i] = 0;
}
}
byte[] zipped = SwfWriter.ZipBytes(mapData);
if (OrgBitmapData != null)
{
w.AppendBytes(OrgBitmapData);
}
else
{
w.AppendBytes(zipped);
}
}
else if (BitmapFormat == BitmapFormat.RGB15Bit) // rbg 15
{
// todo: find a test file for rgb555
uint colorBytes = 2;
uint padWidth = this.Width * colorBytes;
padWidth += (4 - padWidth) % 4;
uint unzippedSize = (padWidth * this.Height) * colorBytes;
byte[] mapData = new byte[unzippedSize];
int index = 0;
uint byteCount = padWidth * this.Height;
for (uint i = 0; i < unzippedSize; i += colorBytes)
{
byte rd = this.BitmapData[index].R;
byte gr = this.BitmapData[index].G;
byte bl = this.BitmapData[index].B;
byte b0 = 0;
byte b1 = 0;
b0 |= (byte)((rd & 0x7C) << 1);
b0 |= (byte)((gr & 0x03) << 6);
b1 |= (byte)((gr & 0xE0) >> 2);
b1 |= (byte)((bl & 0x1F) << 3);
mapData[i + 0] = b0;
mapData[i + 1] = b1;
index++;
}
byte[] zipped = SwfWriter.ZipBytes(mapData);
if (OrgBitmapData != null)
{
w.AppendBytes(OrgBitmapData);
}
else
{
w.AppendBytes(zipped);
}
}
else if (BitmapFormat == BitmapFormat.RGB24Bit) // RGB 24
{
uint colorBytes = HasAlpha ? (uint)4 : (uint)3;
uint unzippedSize = (this.Width * this.Height) * colorBytes;
byte[] mapData = new byte[unzippedSize];
int index = 0;
for (uint i = 0; i < unzippedSize; i += colorBytes)
{
mapData[i + 0] = this.BitmapData[index].A;
mapData[i + 1] = this.BitmapData[index].R;
mapData[i + 2] = this.BitmapData[index].G;
if (HasAlpha)
{
mapData[i + 3] = this.BitmapData[index].B;
}
index++;
}
byte[] zipped = SwfWriter.ZipBytes(mapData);
if (OrgBitmapData != null)
{
w.AppendBytes(OrgBitmapData);
}
else
{
w.AppendBytes(zipped);
}
}
w.ResetLongTagLength(this.TagType, start, true);
}
