利用Unity脚本自定义分辨率实现相机截一张高清截图

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 = GetcomponentCamera>
    ();
            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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