internal DefineBitsLosslessTag(SwfReader r, uint curTagLen, bool hasAlpha)
: base(TagType.DefineBitsLossless)
{
TagLen = curTagLen;
HasAlpha = hasAlpha;
if (hasAlpha)
{
tagType = TagType.DefineBitsLossless2;
}
CharacterId = r.GetUI16();
BitmapFormat = (BitmapFormat)r.GetByte();
this.Width = r.GetUI16();
this.Height = r.GetUI16();
if (BitmapFormat == BitmapFormat.Colormapped8Bit) // 8-bit colormapped image
{
this.ColorCount = (uint)r.GetByte() + 1;
this.isIndexedColors = true;
uint colorBytes = hasAlpha ? (uint)4 : (uint)3;
uint padWidth = this.Width + (4 - (this.Width % 4));
// temp for debugging
uint pos = r.Position;
OrgBitmapData = r.GetBytes(curTagLen - 8);
r.Position = pos;
// end temp
uint unzippedSize = (this.ColorCount * colorBytes) + (padWidth * this.Height);
byte[] mapData = r.DecompressZLIB(curTagLen - 8, unzippedSize);
uint index = 0;
this.ColorTable = new RGBA[this.ColorCount];
for (int i = 0; i < this.ColorCount; i++)
{
if (hasAlpha)
{
this.ColorTable[i] = new RGBA(mapData[index], mapData[index + 1], mapData[index + 2], mapData[index + 3]);
}
else
{
this.ColorTable[i] = new RGBA(mapData[index], mapData[index + 1], mapData[index + 2]);
}
index += colorBytes;
}
this.ColorData = new uint[this.Width * this.Height];
index = 0;
int offset = (int)(this.ColorCount * colorBytes);
for (int i = 0; i < padWidth * this.Height; i++)
{
if ((i % padWidth) < this.Width) // exclude padding
{
this.ColorData[index++] = mapData[i + offset];
}
}
}
else if (BitmapFormat == BitmapFormat.RGB15Bit) // RGBx555
{
// todo: find a test file for rgb555
uint colorBytes = 2;
uint padWidth = this.Width * colorBytes;
padWidth += (4 - padWidth) % 4;
// temp for debugging
uint pos = r.Position;
OrgBitmapData = r.GetBytes(curTagLen - 7);
r.Position = pos;
// end temp
uint unzippedSize = (padWidth * this.Height) * colorBytes;
byte[] mapData = r.DecompressZLIB(curTagLen - 7, unzippedSize);
int index = 0;
this.BitmapData = new RGBA[this.Width * this.Height];
for (uint i = 0; i < unzippedSize; i += colorBytes)
{
if ((i % padWidth) < (this.Width * colorBytes)) // exclude padding
{
byte b0 = mapData[i];
byte b1 = mapData[i + 1];
byte rd = (byte)((b0 & 0x7C) << 1);
byte gr = (byte)(((b0 & 0x03) << 6) | ((b1 & 0xE0) >> 2));
byte bl = (byte)((b1 & 0x1F) << 3);
this.BitmapData[index++] = new RGBA(rd, gr, bl);
}
}
}
else if (BitmapFormat == BitmapFormat.RGB24Bit) // RGB 24
{
// temp for debugging
uint pos = r.Position;
OrgBitmapData = r.GetBytes(curTagLen - 7);
r.Position = pos;
// end temp
uint colorBytes = 4; // 4 bytes will always be byte aligned
uint unzippedSize = (this.Width * this.Height) * colorBytes;
byte[] mapData = r.DecompressZLIB(curTagLen - 7, unzippedSize);
int index = 0;
this.BitmapData = new RGBA[this.Width * this.Height];
for (uint i = 0; i < unzippedSize; i += colorBytes)
{
if (hasAlpha)
{
this.BitmapData[index++] = new RGBA(mapData[i + 1], mapData[i + 2], mapData[i + 3], mapData[i]);
}
else
{
this.BitmapData[index++] = new RGBA(mapData[i + 1], mapData[i + 2], mapData[i + 3]);
}
}
}
}