将Gif图转换成Unity Texture2D

发表于2018-09-02
评论0 4.9k浏览
最近项目里要从网上拉取玩家的头像,可玩家的头像可以用gif图但unity不支持gif图,这样就会出现拉取失败会显示问号的图,那是Unity内转换Texture2D图失败是给的默认图。于是在网上查找解决方案,果然在http://wiki.unity3d.com/index.php/AnimatedGifDrawer上找到了;将Gif图转换成Unity Texture2D的原理是:将gif图拆分成多个单个图片,用Texture2D存放,然后逐个替换Texture2D达到动态效果。

下面是我根据用上面连接里的代码做的测试:
using UnityEngine;
using System.Collections.Generic;
using System.Drawing;
using System.Drawing.Imaging;
/*
 这里引用的System.Drawing是在C:\Program Files (x86)\Unity\Editor\Data\Mono\lib\mono\2.0目录下,这个是unity安装的目录;
 */
public class GifToTexture : MonoBehaviour
{
    public UITexture GifTexture;
    private List<Texture2D> _mTexture2Ds = new List<Texture2D>();
    private float _mTime;
    private float _mSpeed = 5.0f;
	// Use this for initialization
	void Start ()
	{
        Image image = Image.FromFile(@"G:\1405069286948.gif");
	    _mTexture2Ds = GifToTextureByCS(image);
	}
	// Update is called once per frame
	void Update () {
	    if (null != GifTexture && _mTexture2Ds.Count > 0)
	    {
	        _mTime += Time.deltaTime;
	        int index = (int)(_mTime*_mSpeed)%_mTexture2Ds.Count;
	        GifTexture.mainTexture = _mTexture2Ds[index];
	    }
	}
    List<Texture2D> GifToTextureByCS(Image image)
    {
        List<Texture2D> texture2D = null;
        if (null != image)
        {
            texture2D = new List<Texture2D>();
            //Debug.LogError(image.FrameDimensionsList.Length);
            //image.FrameDimensionsList.Length = 1;
            //根据指定的唯一标识创建一个提供获取图形框架维度信息的实例;
            FrameDimension frameDimension = new FrameDimension(image.FrameDimensionsList[0]);
            //获取指定维度的帧数;
            int framCount = image.GetFrameCount(frameDimension);
            for (int i = 0; i < framCount; i++)
            {
                //选择由维度和索引指定的帧;
                image.SelectActiveFrame(frameDimension, i);
                var framBitmap = new Bitmap(image.Width, image.Height);
                //从指定的Image 创建新的Graphics,并在指定的位置使用原始物理大小绘制指定的 Image;
                //将当前激活帧的图形绘制到framBitmap上;
                System.Drawing.Graphics.FromImage(framBitmap).DrawImage(image, Point.Empty);
                var frameTexture2D = new Texture2D(framBitmap.Width, framBitmap.Height);
                for (int x = 0; x < framBitmap.Width; x++)
                {
                    for (int y = 0; y < framBitmap.Height; y++)
                    {
                        //获取当前帧图片像素的颜色信息;
                        System.Drawing.Color sourceColor = framBitmap.GetPixel(x, y);
                        //设置Texture2D上对应像素的颜色信息;
                        frameTexture2D.SetPixel(x, framBitmap.Height - 1 - y, new Color32(sourceColor.R, sourceColor.G, sourceColor.B, sourceColor.A));
                    }
                }
                frameTexture2D.Apply();
                texture2D.Add(frameTexture2D);
            }
        }
        return texture2D;
    }
}

效果图如下:

上面代码只要调好时间效果就和这个差不多了。

以上就是将Gif图转换成Unity Texture2D的方法,希望能对大家有帮助,
来自:https://blog.csdn.net/hyf2713/article/details/52452854

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