绘制gif文件

最新推荐文章于 2022-04-13 11:44:05 发布

原创最新推荐文章于 2022-04-13 11:44:05 发布 · 597 阅读

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CC 4.0 BY-SA版权

文章标签：

#animation #object #class

本文介绍了一个使用C#实现的简单程序，该程序能够在Windows窗体中加载并播放GIF动画。通过实例代码展示了如何利用ImageAnimator类来播放GIF动画，并讲解了关键步骤如初始化动画图片、触发帧变化及重绘等。

using System;
using System.Drawing;
using System.Windows.Forms;

public class animateImage : Form
{

    //Create a Bitmpap Object.
    Bitmap animatedImage = new Bitmap("SampleAnimation.gif");
    bool currentlyAnimating = false;

    //This method begins the animation.
    public void AnimateImage()
    {
        if (!currentlyAnimating)
        {

            //Begin the animation only once.
            ImageAnimator.Animate(animatedImage, new EventHandler(this.OnFrameChanged));
            currentlyAnimating = true;
        }
    }

private void OnFrameChanged(object o, EventArgs e)
{

        //Force a call to the Paint event handler.
        this.Invalidate();
    }

protected override void OnPaint(PaintEventArgs e)
{

//Begin the animation.
AnimateImage();

//Get the next frame ready for rendering.
ImageAnimator.UpdateFrames();

        //Draw the next frame in the animation.
        e.Graphics.DrawImage(this.animatedImage, new Point(0, 0));
    }

    public static void Main()
    {
        Application.Run(new animateImage());
    }
}

这里要注意一点：

bitmap一定要放在Paint事件外面，否则就重复画一帧；