public void Read(Stream s)
{
Desc.Read(s);
if (Desc.GlobalColorTableFlag)
{
GlobalColorTable = new GifColorTable();
GlobalColorTable.ColorsAmount = (int)Math.Pow(2, Desc.SizeOfGlobalColorTable + 1);
GlobalColorTable.Read(s);
}
}
public Bitmap GetDecodedBmp(int _index)
{
var fr = GetRenderBlock(_index);
var gce = GetGceBlock(fr);
LastRenderBlock = fr;
LastGceBlock = gce;
Bitmap decbmp = new Bitmap(fr.Width, fr.Height);
LockBitmap l = new LockBitmap(decbmp);
l.LockBits();
var dec = GifParser.GetDecodedData(fr);
GifColorTable clrt = LogicalScreen.GlobalColorTable;
if (fr.LocalColorTableFlag)
{
clrt = fr.ColorTable;
}
for (int i = 0; i < fr.Width; i++)
{
for (int j = 0; j < fr.Height; j++)
{
int index = j * fr.Width + i;
var clr = clrt.Colors[dec[index]];
if (gce.TransparencyFlag && gce.TransparentColorIndex == dec[index])
{
l.SetPixel(i, j, Color.Transparent);
}
else
{
l.SetPixel(i, j, clr);
}
}
}
l.UnlockBits();
return(decbmp);
}