public static Image GenerateGifByDegree(Double degree)
{
string strDegree = Convert.ToInt32((degree % 360 + 360) % 360).ToString();
if (!Directory.Exists(GifPath))
{
Directory.CreateDirectory(GifPath);
}
String outputFilePath = GifPath + "ArrowBack" + strDegree + ".gif";
if (!File.Exists(outputFilePath))
{
String[] imageFilePaths = new String[] { JpgPath + "ArrowBack0.JPG",
JpgPath + "ArrowBack1.JPG",
JpgPath + "ArrowBack2.JPG",
JpgPath + "ArrowBack3.JPG" };
AnimatedGifEncoder gifEncoder = new AnimatedGifEncoder();
gifEncoder.Start(outputFilePath);
gifEncoder.SetDelay(GifInterval);
//-1:no repeat,0:always repeat
gifEncoder.SetRepeat(0);
for (int i = 0, count = imageFilePaths.Length; i < count; i++)
{
gifEncoder.AddFrame(DrawUtility.Rotate(Image.FromFile(imageFilePaths[i]), degree));
}
gifEncoder.Finish();
}
return(Image.FromFile(outputFilePath));
}
