一、固定区域截屏：
二、自由截图
using System.Collections; using UnityEngine; ///挂在摄像机上 ///如果要截图UI，需将Canvas的RenderMode设置为Screen Space-Camera，并将Render Camera设置为挂该脚本的摄像机 public class Capture : MonoBehaviour { public Color rColor = Color.green;//截图框颜色 public Vector3 start = Vector3.zero;//开始位置 public Vector3 end = Vector3.zero;//结束位置 public Material rMat = null;//截图框材质，shader为"UI/Default"即可 public bool drawFlag = false;//是否开始截图 private Rect rect;//截图区域 private Texture2D cutImage;//图片 byte[] bytes;//图片byte void Update() { //按下鼠标左键开始截图 if (Input.GetMouseButtonDown(0) && SecondPageManager._instance. ToCapture) { SecondPageManager._instance.CapturePanel.SetActive(false); drawFlag = true; start = Input.mousePosition; } //抬起鼠标左键结束截图 if (Input.GetMouseButtonUp(0) && SecondPageManager._instance.ToCapture && drawFlag) { SecondPageManager._instance.ToCapture = false; drawFlag = false; StartCoroutine(CutImage()); } //点击鼠标右键取消截图 if (Input.GetMouseButtonDown(1) && SecondPageManager._instance.ToCapture) { SecondPageManager._instance.CapturePanel.transform.parent.gameObject.SetActive(false); SecondPageManager._instance.CapturePanel.SetActive(false); SecondPageManager._instance.ToCapture = false; drawFlag = false; } } //绘制框选 void OnPostRender() { if (drawFlag) { end = Input.mousePosition;//鼠标当前位置 GL.PushMatrix();//保存摄像机变换矩阵 if (!rMat) return; rMat.SetPass(0); GL.LoadPixelMatrix();//设置用屏幕坐标绘图 GL.Begin(GL.QUADS); GL.Color(new Color(rColor.r, rColor.g, rColor.b, 0.2f));//设置颜色和透明度，方框内部透明 GL.Vertex3(start.x, start.y, 0); GL.Vertex3(end.x, start.y, 0); GL.Vertex3(end.x, end.y, 0); GL.Vertex3(start.x, end.y, 0); GL.End(); GL.Begin(GL.LINES); GL.Color(rColor);//设置方框的边框颜色 边框不透明 GL.Vertex3(start.x, start.y, 0); GL.Vertex3(end.x, start.y, 0); GL.Vertex3(end.x, start.y, 0); GL.Vertex3(end.x, end.y, 0); GL.Vertex3(end.x, end.y, 0); GL.Vertex3(start.x, end.y, 0); GL.Vertex3(start.x, end.y, 0); GL.Vertex3(start.x, start.y, 0); GL.End(); GL.PopMatrix();//恢复摄像机投影矩阵 } } IEnumerator CutImage() { string date = System.DateTime.Now.ToString("yyyyMMddHHmmss"); //图片大小 if (end.x > start.x&& start.y > end.y) { cutImage = new Texture2D((int)(end.x - start.x), (int)(start.y - end.y), TextureFormat.RGB24, true); //坐标左下角为(0,0)点 rect = new Rect((int)start.x, Screen.height - (int)(Screen.height - end.y), (int)(end.x - start.x), (int)(start.y - end.y)); yield return new WaitForEndOfFrame(); cutImage.ReadPixels(rect, 0, 0, false); cutImage.Apply(); yield return cutImage; bytes = cutImage.EncodeToPNG(); //保存截图 //File.WriteAllBytes("D:/CutImage" + date + ".png", bytes); //公式识别 StartCoroutine(FormulaRecognize._instance.OCRIdentify(bytes)); } else { StartCoroutine(FormulaRecognize._instance.OCRIdentify(null)); Debug.Log("请按照左上角到右下角的方式截图"); } } } 
文章来源: https://blog.csdn.net/weixin_39766005/article/details/90641950