我在寻找一个.NET C＃GIF动画库（并不一定是免费的），让我把一个GIF文件，将其安装JPEG甚至另一个gif文件的框架。我还需要能够添加在帧之间变化的延迟。 在回答类似的问题在这里通常引用的基本库，只允许你添加静态图像之间的固定延迟。

I'm looking for a .NET C# gif animation library (doesn't have to be free) that will allow me to take a gif file and attach it a frame of jpeg or even another gif file. i will also need to be able to add changing delay between the frames. The answer to similar questions here usually reference to a basic library that only allows you to add a fixed delay between static images.

推荐答案

我最终修改http://www.$c$cproject.com/KB/GDI-plus/NGif.aspx code得到什么，我需要和它的工作！ ：）

I ended up modifying http://www.codeproject.com/KB/GDI-plus/NGif.aspx code to get what I needed and it worked! :)

为GIF源文件处理我加入这个方法：

for the gif source file handling I added this method:

        private bool AddGifFrames(Image image)
    {
        // implementation

        var fd = new FrameDimension(image.FrameDimensionsList[0]);
        int frameCount = image.GetFrameCount(fd);

        var frames = new List<Tuple<int, Image>>();

        if (frameCount > 1)
        {
            frames = new List<Tuple<int, Image>>();

            //0x5100 is the property id of the GIF frame's durations
            //this property does not exist when frameCount <= 1
            byte[] times = image.GetPropertyItem(0x5100).Value;

            for (int i = 0; i < frameCount; i++)
            {
                //selects GIF frame based on FrameDimension and frameIndex
                image.SelectActiveFrame(fd, i);

                //length in milliseconds of display duration
                int length = BitConverter.ToInt32(times, 4 * i);

                //save currect image frame as new bitmap
                frames.Add(new Tuple<int, Image>(length, new Bitmap(image)));
            }
        } // Not animated

        foreach (var frame in frames)
        {
            HandleFrame(frame.Item2, frame.Item1);
        }

        return true;
    }

和作为定制延迟我修改这个方法：

and as for the custom delays I've modified this method:

        protected void WriteGraphicCtrlExt(int? delay)
    {
        Fs.WriteByte(0x21); // extension introducer
        Fs.WriteByte(0xf9); // GCE label
        Fs.WriteByte(4); // data block size
        int transp, disp;
        if (Transparent == Color.Empty)
        {
            transp = 0;
            disp = 0; // dispose = no action
        }
        else
        {
            transp = 1;
            disp = 2; // force clear if using transparent color
        }
        if (Dispose >= 0)
        {
            disp = Dispose & 7; // user override
        }
        disp <<= 2;

        // packed fields
        Fs.WriteByte(Convert.ToByte(0 | // 1:3 reserved
                                    disp | // 4:6 disposal
                                    0 | // 7   user input - 0 = none
                                    transp)); // 8   transparency flag

        WriteShort(delay ?? Delay); // delay x 1/100 sec
        Fs.WriteByte(Convert.ToByte(TransIndex)); // transparent color index
        Fs.WriteByte(0); // block terminator
    }

来概括 - 这code可以通过将其分割为框架，并把它们添加添加GIF作为一个框架，而且还可以添加自定义的延迟

to sum it up - this code can add a gif as a frame by splitting it to frames and adding them, and it can also add custom delays.