private int ParseBlock(byte[] gifData, int offset)
{
switch (gifData[offset])
{
case 33:
if ((int)gifData[offset + 1] == 249)
{
return(this.ParseGraphicControlExtension(gifData, offset));
}
return(this.ParseExtensionBlock(gifData, offset));
case 44:
offset = this.ParseGraphicBlock(gifData, offset);
this.frameList.Add(this.currentParseGifFrame);
this.currentParseGifFrame = new GifAnimation.GifFrame();
return(offset);
case 59:
return(-1);
default:
throw new Exception("GIF format incorrect: missing graphic block or special-purpose block. ");
}
}
private void ParseGif(byte[] gifData)
{
this.frameList = new List <GifAnimation.GifFrame>();
this.currentParseGifFrame = new GifAnimation.GifFrame();
this.ParseGifDataStream(gifData, 0);
}