Unity 裁剪或者拷贝图片

方法一：

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/// <summary> /// 裁剪或者拷贝图片，图片的原点在左下角 /// </summary> /// <param name="原图"></param> /// <param name="x,y表示从原图的什么位置开始裁剪，w,h表示裁剪的宽高"></param> /// <param name="x,y表示拷贝到新的图片中的什么位置，w,h新的图片的宽高"></param> /// <returns></returns> Texture2D CopyOrCutTexture(Texture2D source, RectInt cutScope, RectInt targetScope) {     Color[] colors = source.GetPixels(cutScope.x, cutScope.y, cutScope.width, cutScope.height);     Texture2D target = new Texture2D(targetScope.width, targetScope.height, source.format, false);     target.SetPixels(targetScope.x, targetScope.y, targetScope.width, targetScope.height, colors);     return target; }

　　

方法二：

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/// <summary> /// 裁剪或者拷贝图片，图片的原点在左下角 /// </summary> /// <param name="原图"></param> /// <param name="x,y表示从原图的什么位置开始裁剪，w,h表示裁剪的宽高"></param> /// <param name="x,y表示拷贝到新的图片中的什么位置，w,h新的图片的宽高"></param> /// <returns></returns> Texture2D CutOrCopyTexture(Texture2D source, RectInt cutScope, RectInt targetScope) {     Texture2D target = new Texture2D(targetScope.width, targetScope.height, source.format, false);     Graphics.CopyTexture(source, 0, 0, cutScope.x, cutScope.y, cutScope.width, cutScope.height, target, 0, 0, targetScope.x, targetScope.y);     return target; }

　　

完整代码：

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using System.Collections; using System.Collections.Generic; using UnityEngine;   public class CopyTexture : MonoBehaviour {       public Texture2D source;       void Start () {         //Texture2D target = CopyOrCutTexture(source, new RectInt(0, 0, 500, 500), new RectInt(0, 0, 500, 500));         //byte[] data = target.EncodeToPNG();         //System.IO.File.WriteAllBytes("E:\\temp.png", data);           Texture2D target = CutOrCopyTexture(source, new RectInt(0, 0, 500, 500), new RectInt(0, 0, 500, 500));         byte[] data = target.EncodeToPNG();         System.IO.File.WriteAllBytes("E:\\temp.png", data);     }       /// <summary>     /// 裁剪或者拷贝图片，图片的原点在左下角     /// </summary>     /// <param name="原图"></param>     /// <param name="x,y表示从原图的什么位置开始裁剪，w,h表示裁剪的宽高"></param>     /// <param name="x,y表示拷贝到新的图片中的什么位置，w,h新的图片的宽高"></param>     /// <returns></returns>     Texture2D CopyOrCutTexture(Texture2D source, RectInt cutScope, RectInt targetScope)     {         Color[] colors = source.GetPixels(cutScope.x, cutScope.y, cutScope.width, cutScope.height);         Texture2D target = new Texture2D(targetScope.width, targetScope.height, source.format, false);         target.SetPixels(targetScope.x, targetScope.y, targetScope.width, targetScope.height, colors);         return target;     }       /// <summary>     /// 裁剪或者拷贝图片，图片的原点在左下角     /// </summary>     /// <param name="原图"></param>     /// <param name="x,y表示从原图的什么位置开始裁剪，w,h表示裁剪的宽高"></param>     /// <param name="x,y表示拷贝到新的图片中的什么位置，w,h新的图片的宽高"></param>     /// <returns></returns>     Texture2D CutOrCopyTexture(Texture2D source, RectInt cutScope, RectInt targetScope)     {         Texture2D target = new Texture2D(targetScope.width, targetScope.height, source.format, false);         Graphics.CopyTexture(source, 0, 0, cutScope.x, cutScope.y, cutScope.width, cutScope.height, target, 0, 0, targetScope.x, targetScope.y);         return target;     } }