DesktopMagic-Plugins/Plugins/Gif Plugin/source.cs

using DesktopMagicPluginAPI;
using DesktopMagicPluginAPI.Inputs;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using System.Collections.Generic;
using System.Threading.Tasks;
using System;

namespace DesktopMagicPlugin.Test
{
    public class GifPlugin : Plugin
    {
        [Element("Gif path:")]
        private TextBox input = new TextBox("");

        [Element]
        private Label info = new Label("");

        private List<Bitmap> bitmaps = new List<Bitmap>();

        private int frameCount = -1;

        private const string SaveFilePath = "gifPath.txt";

        public override void Start()
        {
            input.OnValueChanged += Input_OnValueChanged;
            if (File.Exists(SaveFilePath))
            {
                input.Value = File.ReadAllText(SaveFilePath);
            }
        }

        private void Input_OnValueChanged()
        {
            _ = Task.Run(() =>
            {
                try
                {
                    if (File.Exists(input.Value))
                    {
                        info.Value = "Loading...";
                        Image gif = Image.FromFile(input.Value);

                        PropertyItem item = gif.GetPropertyItem(0x5100); // FrameDelay in libgdiplus

                        UpdateInterval = (item.Value[0] + item.Value[1] * 256) * 10; //FrameDelay in ms
                        bitmaps.Clear();
                        for (int i = 0; i < gif.GetFrameCount(FrameDimension.Time); i++)
                        {
                            gif.SelectActiveFrame(FrameDimension.Time, i);

                            bitmaps.Add(new Bitmap(gif));
                        }
                        File.WriteAllText(SaveFilePath, input.Value);
                        info.Value = string.Empty;
                    }
                    else
                    {
                        info.Value = "File not found!";
                    }
                }
                catch (Exception ex)
                {
                    info.Value = $"Error: {ex.Message}";
                }
            });
        }

        public override Bitmap Main()
        {
            if (bitmaps.Count == 0)
                return new Bitmap(1, 1);

            frameCount++;

            if (frameCount >= bitmaps.Count)
                frameCount = 0;

            return bitmaps[frameCount];
        }
    }
}