利用Unity脚本自定义分辨率实现相机截一张高清截图

最近做项目的时候需要在游戏里截一张高清截图，研究了一下写成脚本，方便以后使用。脚本可以自定义分辨率，用相机截高清截图。可以用代码动态截图，也可以在编辑模式下截图。注意截图宽高比要正确，宽高比不正确时可能会出问题。

截图效果：

脚本:CameraCapture.cs

using UnityEngine; using System.IO;  /// <summary> /// 相机截图 /// <para>ZhangYu 2018-07-06</para> /// </summary> public class CameraCapture : MonoBehaviour {      // 截图尺寸     public enum CaptureSize {         CameraSize,         ScreenResolution,         FixedSize     }      // 目标摄像机     public Camera targetCamera;     // 截图尺寸     public CaptureSize captureSize = CaptureSize.CameraSize;     // 像素尺寸     public Vector2 pixelSize;     // 保存路径     public string savePath = "StreamingAssets/";     // 文件名称     public string fileName = "cameraCapture.png";      #if UNITY_EDITOR     private void Reset() {         targetCamera = GetComponent<Camera>();         pixelSize = new Vector2(Screen.currentResolution.width, Screen.currentResolution.height);     }     #endif      /// <summary> 保存截图 </summary>     /// <param name="camera">目标摄像机</param>     public void saveCapture() {         Vector2 size = pixelSize;         if (captureSize == CaptureSize.CameraSize) {             size = new Vector2(targetCamera.pixelWidth, targetCamera.pixelHeight);         } else if (captureSize == CaptureSize.ScreenResolution) {             size = new Vector2(Screen.currentResolution.width, Screen.currentResolution.height);         }         string path = Application.dataPath + "/" + savePath + fileName;         saveTexture(path, capture(targetCamera, (int)size.x, (int)size.y));     }      /// <summary> 相机截图 </summary>     /// <param name="camera">目标相机</param>     public static Texture2D capture(Camera camera) {         return capture(camera, Screen.width, Screen.height);     }      /// <summary> 相机截图 </summary>     /// <param name="camera">目标相机</param>     /// <param name="width">宽度</param>     /// <param name="height">高度</param>     public static Texture2D capture(Camera camera, int width, int height) {         RenderTexture rt = new RenderTexture(width, height, 0);         rt.depth = 24;         rt.antiAliasing = 8;         camera.targetTexture = rt;         camera.RenderDontRestore();         RenderTexture.active = rt;         Texture2D texture = new Texture2D(width, height, TextureFormat.ARGB32, false, true);         Rect rect = new Rect(0, 0, width, height);         texture.ReadPixels(rect, 0, 0);         texture.filterMode = FilterMode.Point;         texture.Apply();         camera.targetTexture = null;         RenderTexture.active = null;         Destroy(rt);         return texture;     }      /// <summary> 保存贴图 </summary>     /// <param name="path">保存路径</param>     /// <param name="texture">Texture2D</param>     public static void saveTexture(string path, Texture2D texture) {         File.WriteAllBytes(path, texture.EncodeToPNG());         #if UNITY_EDITOR         Debug.Log("已保存截图到:" + path);         #endif     }  }

脚本编辑器:

CameraCaptureEditor.cs

using UnityEditor; using UnityEngine;  /// <summary> /// 相机截图 编辑器 /// <para>ZhangYu 2018-07-06</para> /// </summary> [CanEditMultipleObjects] [CustomEditor(typeof(CameraCapture))] public class CameraCaptureEditor : Editor {      public override void OnInspectorGUI() {         // 属性         CameraCapture script = (CameraCapture)target;         int selected = (int)script.captureSize;          // 重绘GUI         EditorGUI.BeginChangeCheck();         drawProperty("targetCamera", "目标像机");         string[] options = new string[] { "像机尺寸", "屏幕尺寸", "固定尺寸"};         selected = EditorGUILayout.Popup("截图尺寸", selected, options, GUILayout.ExpandWidth(true));         script.captureSize = (CameraCapture.CaptureSize)selected;         if (script.captureSize == CameraCapture.CaptureSize.FixedSize) {             drawProperty("pixelSize", "像素尺寸");             EditorGUILayout.HelpBox("请保持正确的宽高比！\n否则截图区域可能出现错误。", MessageType.Info);         }         drawProperty("savePath", "保存路径");         drawProperty("fileName", "文件名称");          // 保存截图按钮         bool isPress = GUILayout.Button("保存截图", GUILayout.ExpandWidth(true));         if (isPress) script.saveCapture();         if (EditorGUI.EndChangeCheck()) serializedObject.ApplyModifiedProperties();     }      private void drawProperty(string property, string label) {         EditorGUILayout.PropertyField(serializedObject.FindProperty(property), new GUIContent(label), true);     }  }

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