异常保护

app/src/main/cpp/PhoneDevice.cpp

@@ -1569,6 +1569,14 @@ bool CPhoneDevice::OnImageReady(cv::Mat& mat)
     cv::Point lt2(0, lt.y - 2 * ratio);
     cv::Point rb(0 + textSize.width, lt2.y + textSize.height + 8 * ratio);
 
+    if (rb.x > (int)width - 1)
+    {
+        rb.x = (int)width - 1;
+    }
+    if (rb.y > (int)height - 1)
+    {
+        rb.y = (int)height - 1;
+    }
     cv::Mat roi = mat(cv::Rect(lt2, rb));
     cv::Mat clrMat(roi.size(), CV_8UC3, scalarWhite);
     double alpha = 0.2;