Unity 图片水印生成

用于图片分享时添加logo水印的功能，之前用来做你画我猜的方法，核心是用Texture2D中的 SetPixels方法

具体实现如下

效果图：

 

上代码，比较简单不多说了

using UnityEngine;
using System.Collections;
using UnityEngine.UI;

public class WaterMarkAdd : MonoBehaviour {
    public Image targetImage;
    public Sprite logoSprite;
    public Sprite imageSprite;
	// Use this for initialization
	void Start () {
        Texture2D t = AddLogo(imageSprite.texture, logoSprite.texture);
        Sprite s = new Sprite();
        s=Sprite.Create(t, new Rect(0,0,t.width, t.height),new Vector2(0.5f,0.5f));
        targetImage.sprite = s;
	}

    private Texture2D AddLogo(Texture2D image,Texture2D logo)
    {
        Texture2D logoTexture = new Texture2D(image.width,image.height);
        Color[] colors = image.GetPixels();
        for (int i = 0; i < logo.width; i++)
        {
            for (int j = 0; j < logo.height; j++)
            {
                Color c = logo.GetPixel(i, j); 

                if (c.a != 0)
                {
                    colors[logoTexture.width * j + i] = c;
                }
                
            }
        }
        logoTexture.SetPixels(0, 0, image.width, image.height, colors);
        logoTexture.Apply();
        return logoTexture;
    }


}