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使用Unity编辑器扩展技术实现快速截图功能

效果：

里面没有什么太难的技术，直接上源码吧

• 注意！代码需要放在Editor文件下才能正常运行

using System;
using UnityEditor;
using UnityEngine;[ExecuteInEditMode]
public class Screenshot : EditorWindow
{int MaxShowSelectGo = 5;//最多显示选中的物体int resWidth = Screen.width * 4;int resHeight = Screen.height * 4;public Camera myCamera;int scale = 1;float delayCreateTime = 0.5f;string path = "";bool showPreview = true;RenderTexture renderTexture;GameObject[] selectGOs;bool isTransparent = true;bool isCaptureMultiple = false;// Add menu item named "My Window" to the Window menu[MenuItem("Tools/图片生成器")]public static void ShowWindow(){//Show existing window instance. If one doesn't exist, make one.EditorWindow editorWindow = EditorWindow.GetWindow(typeof(Screenshot));editorWindow.autoRepaintOnSceneChange = true;editorWindow.Show();editorWindow.title = "图片生成器";}float lastTime;void OnGUI(){EditorGUILayout.LabelField("分辨率", EditorStyles.boldLabel);resWidth = EditorGUILayout.IntField("宽", resWidth);resHeight = EditorGUILayout.IntField("高", resHeight);EditorGUILayout.Space();EditorGUILayout.BeginHorizontal();EditorGUILayout.LabelField("默认设置", EditorStyles.boldLabel);if (GUILayout.Button("使用Game视图的分辨率")){resHeight = (int)Handles.GetMainGameViewSize().y;resWidth = (int)Handles.GetMainGameViewSize().x;}if (GUILayout.Button("使用默认大小。H：1440，W：2560")){resHeight = 1440;resWidth = 2560;scale = 1;}EditorGUILayout.EndHorizontal();EditorGUILayout.Space();scale = EditorGUILayout.IntSlider("尺寸", scale, 1, 15);EditorGUILayout.HelpBox("截图的默认模式是裁剪，所以选择合适的宽度和高度。比例是在不损失质量的情况下倍增或放大渲染的一个因素.", MessageType.None);EditorGUILayout.Space();EditorGUILayout.LabelField("截图分辨率为 " + resWidth * scale + " x " + resHeight * scale + " p", EditorStyles.boldLabel);EditorGUILayout.Space();EditorGUILayout.BeginHorizontal();GUILayout.Label("选择相机", EditorStyles.boldLabel);myCamera = EditorGUILayout.ObjectField(myCamera, typeof(Camera), true, null) as Camera;if (myCamera == null) myCamera = Camera.main;if (myCamera != null) myCamera.clearFlags = CameraClearFlags.SolidColor;isTransparent = EditorGUILayout.Toggle("透明背景", isTransparent);EditorGUILayout.EndHorizontal();EditorGUILayout.HelpBox("选择要捕捉渲染的相机。勾选则背景透明", MessageType.None);EditorGUILayout.Space();isCaptureMultiple = EditorGUILayout.Toggle("一次性捕捉多个物体", isCaptureMultiple);if (isCaptureMultiple){selectGOs = Selection.gameObjects;GUILayout.Label((selectGOs.Length == 0 ? "你还什么都没有选。使用鼠标选中场景中的物体，用Shift或者Ctrl多选。" : "当前选择物体数量："+ selectGOs.Length), EditorStyles.boldLabel);int ShowSelectGo = 0;foreach (var item in selectGOs){if (ShowSelectGo>=MaxShowSelectGo&& MaxShowSelectGo < selectGOs.Length){GUILayout.Label("......", EditorStyles.boldLabel);break;}GUILayout.Label(item.name, EditorStyles.boldLabel);ShowSelectGo++;}}EditorGUILayout.Space();GUILayout.Label("保存路径", EditorStyles.boldLabel);EditorGUILayout.BeginHorizontal();EditorGUILayout.TextField(path, GUILayout.ExpandWidth(false));if (GUILayout.Button("选择路径", GUILayout.ExpandWidth(false)))path = EditorUtility.SaveFolderPanel("保存图片的路径", path, Application.dataPath);EditorGUILayout.EndHorizontal();EditorGUILayout.HelpBox("选择保存屏幕截图的文件夹", MessageType.None);EditorGUILayout.Space();delayCreateTime = EditorGUILayout.Slider("延时生成时间", delayCreateTime, 0.5f, 5);EditorGUILayout.HelpBox("请注意！时间越短，生成图片出错的概率就越高。建议调整为1", MessageType.None);if (GUILayout.Button("生成", GUILayout.MinHeight(60))){if (path == "") path = EditorUtility.SaveFolderPanel("保存图片的路径", path, Application.dataPath);if (isCaptureMultiple){StartTakeHiResShot();}else{TakeHiResShot();Application.OpenURL("file://" + path);}}EditorGUILayout.Space();EditorGUILayout.BeginHorizontal();if (GUILayout.Button("打开最后一个截图", GUILayout.MaxWidth(160), GUILayout.MinHeight(40))){if (lastScreenshot != ""){Application.OpenURL("file://" + lastScreenshot);Debug.Log("Opening File " + lastScreenshot);}}if (GUILayout.Button("打开截图文件夹", GUILayout.MaxWidth(100), GUILayout.MinHeight(40))){Application.OpenURL("file://" + path);}EditorGUILayout.EndHorizontal();}GameObject go = null;void StartTakeHiResShot(){if (selectGOs.Length==0){EditorUtility.DisplayDialog("提示", "请注意！你没有选择任何物体，这不会生成图片。\n\n请取消勾选'一次性捕捉多个物体'这个选项生成单张图片.", "确定");return;}foreach (var item in selectGOs){item.SetActive(false);}go = null;Take(0,0);//Take(0);}void Take(int index,float delayTime){if (index < selectGOs.Length){if (go != null) go.SetActive(false);selectGOs[index].SetActive(true);go = selectGOs[index];if (delayTime > delayCreateTime){delayTime = 0;TakeHiResShot();index++;}EditorApplication.delayCall += () => { Take(index, delayTime + 0.1f); };}else{Application.OpenURL("file://" + path);}}void Take(int index){if (index < selectGOs.Length){if (go != null) go.SetActive(false);selectGOs[index].SetActive(true);go = selectGOs[index];//EditorApplication.delayCall += () =>//{//    TakeHiResShot(() => { Take(index + 1); });//};TakeHiResShot(() =>{Take(index + 1);});}else{Application.OpenURL("file://" + path);}}//private bool takeHiResShot = false;public string lastScreenshot = "";public string ScreenShotName(int width, int height){string strPath = "";strPath = string.Format("{0}/screen_{1}x{2}_{3}.png",path,width, height,System.DateTime.Now.ToString("yyyy-MM-dd_HH-mm-ss"));lastScreenshot = strPath;return strPath;}public void TakeHiResShot(Action Callback= null){Debug.Log("采取截图");int resWidthN = resWidth * scale;int resHeightN = resHeight * scale;RenderTexture rt = new RenderTexture(resWidthN, resHeightN, 24);myCamera.targetTexture = rt;TextureFormat tFormat;if (isTransparent)tFormat = TextureFormat.ARGB32;elsetFormat = TextureFormat.RGB24;Texture2D screenShot = new Texture2D(resWidthN, resHeightN, tFormat, false);myCamera.Render();RenderTexture.active = rt;screenShot.ReadPixels(new Rect(0, 0, resWidthN, resHeightN), 0, 0);myCamera.targetTexture = null;RenderTexture.active = null;byte[] bytes = screenShot.EncodeToPNG();string filename = ScreenShotName(resWidthN, resHeightN);System.IO.File.WriteAllBytes(filename, bytes);Debug.Log(string.Format("截图如下: {0}", filename));//Application.OpenURL(filename);Callback?.Invoke();}
}

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