From b5e96d76ebbea7996091780657f5ac09faf6a7e4 Mon Sep 17 00:00:00 2001
From: Alexander Smorkalov <alexander.smorkalov@opencv.ai>
Date: Thu, 9 Oct 2025 11:54:10 +0300
Subject: [PATCH] Fixed warnings produced by x86 builds on Windows.

---
 modules/imgcodecs/src/grfmt_gif.cpp | 2 +-
 modules/imgcodecs/src/utils.cpp     | 4 ++--
 modules/imgcodecs/src/utils.hpp     | 2 +-
 3 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/modules/imgcodecs/src/grfmt_gif.cpp b/modules/imgcodecs/src/grfmt_gif.cpp
index f5307ca39b..f9c5744466 100644
--- a/modules/imgcodecs/src/grfmt_gif.cpp
+++ b/modules/imgcodecs/src/grfmt_gif.cpp
@@ -764,7 +764,7 @@ bool GifEncoder::lzwEncode() {
     //initialize
     int32_t prev = imgCodeStream[0];
 
-    for (int64_t i = 1; i < height * width; i++) {
+    for (size_t i = 1; i < size_t(height * width); i++) {
         // add the output code to the output buffer
         while (bitLeft >= 8) {
             buffer[bufferLen++] = (uchar)output;
diff --git a/modules/imgcodecs/src/utils.cpp b/modules/imgcodecs/src/utils.cpp
index 1e14e86610..cfbd62b7bc 100644
--- a/modules/imgcodecs/src/utils.cpp
+++ b/modules/imgcodecs/src/utils.cpp
@@ -51,10 +51,10 @@ int validateToInt(size_t sz)
     return valueInt;
 }
 
-int64_t validateToInt64(size_t sz)
+int64_t validateToInt64(ptrdiff_t sz)
 {
     int64_t valueInt = static_cast<int64_t>(sz);
-    CV_Assert((size_t)valueInt == sz);
+    CV_Assert((ptrdiff_t)valueInt == sz);
     return valueInt;
 }
 
diff --git a/modules/imgcodecs/src/utils.hpp b/modules/imgcodecs/src/utils.hpp
index b5a00c47b3..f2649f0ecd 100644
--- a/modules/imgcodecs/src/utils.hpp
+++ b/modules/imgcodecs/src/utils.hpp
@@ -45,7 +45,7 @@
 namespace cv {
 
 int validateToInt(size_t step);
-int64_t validateToInt64(size_t step);
+int64_t validateToInt64(ptrdiff_t step);
 
 template <typename _Tp> static inline
 size_t safeCastToSizeT(const _Tp v_origin, const char* msg)