From 4327ab2c0d196b226fbd226a1cda85d49f3c8aee Mon Sep 17 00:00:00 2001
From: nihui <shuizhuyuanluo@126.com>
Date: Tue, 8 Aug 2023 17:39:07 +0800
Subject: [PATCH] do not convert RGB/BGR inplace on imencode/imwrite

---
 highgui/src/highgui.cpp | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/highgui/src/highgui.cpp b/highgui/src/highgui.cpp
index 62375431..93000a86 100644
--- a/highgui/src/highgui.cpp
+++ b/highgui/src/highgui.cpp
@@ -201,12 +201,16 @@ bool imwrite(const String& filename, InputArray _img, const std::vector<int>& pa
     else if (img.type() == CV_8UC3)
     {
         c = 3;
-        cvtColor(img, img, COLOR_BGR2RGB);
+        Mat img2
+        cvtColor(img, img2, COLOR_BGR2RGB);
+        img = img2;
     }
     else if (img.type() == CV_8UC4)
     {
         c = 4;
-        cvtColor(img, img, COLOR_BGRA2RGBA);
+        Mat img2
+        cvtColor(img, img2, COLOR_BGRA2RGBA);
+        img = img2;
     }
     else
     {
@@ -368,12 +372,16 @@ bool imencode(const String& ext, InputArray _img, std::vector<uchar>& buf, const
     else if (img.type() == CV_8UC3)
     {
         c = 3;
-        cvtColor(img, img, COLOR_BGR2RGB);
+        Mat img2;
+        cvtColor(img, img2, COLOR_BGR2RGB);
+        img = img2;
     }
     else if (img.type() == CV_8UC4)
     {
         c = 4;
-        cvtColor(img, img, COLOR_BGRA2RGBA);
+        Mat img2;
+        cvtColor(img, img2, COLOR_BGRA2RGBA);
+        img = img2;
     }
     else
     {