From 67c9019edad10bc57e2204f75ebf96a1f1ca743a Mon Sep 17 00:00:00 2001
From: Bruno Van de Velde <vdv_b@tgui.eu>
Date: Wed, 4 Oct 2023 08:24:49 +0200
Subject: [PATCH] Fixed texture being upside down on Android when copying the
 texture of a RenderTexture

---
 src/SFML/Graphics/Texture.cpp | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/src/SFML/Graphics/Texture.cpp b/src/SFML/Graphics/Texture.cpp
index 0e9575c18..3e66898c0 100644
--- a/src/SFML/Graphics/Texture.cpp
+++ b/src/SFML/Graphics/Texture.cpp
@@ -35,6 +35,7 @@
 
 #include <SFML/System/Err.hpp>
 
+#include <algorithm>
 #include <atomic>
 #include <ostream>
 #include <utility>
@@ -400,6 +401,22 @@ Image Texture::copyToImage() const
         glCheck(GLEXT_glDeleteFramebuffers(1, &frameBuffer));
 
         glCheck(GLEXT_glBindFramebuffer(GLEXT_GL_FRAMEBUFFER, static_cast<GLuint>(previousFrameBuffer)));
+
+        if (m_pixelsFlipped)
+        {
+            // Flip the texture vertically
+            const auto stride             = static_cast<std::ptrdiff_t>(m_size.x * 4);
+            auto       currentRowIterator = pixels.begin();
+            auto       nextRowIterator    = pixels.begin() + stride;
+            auto       reverseRowIterator = pixels.begin() + (stride * static_cast<std::ptrdiff_t>(m_size.y - 1));
+            for (unsigned int i = 0; i < m_size.y / 2; ++i)
+            {
+                std::swap_ranges(currentRowIterator, nextRowIterator, reverseRowIterator);
+                currentRowIterator = nextRowIterator;
+                nextRowIterator += stride;
+                reverseRowIterator -= stride;
+            }
+        }
     }
 
 #else