build: replace WIN32 => _WIN32

modules/imgcodecs/src/grfmt_jpeg.cpp

@@ -57,14 +57,14 @@
 #define mingw_getsp(...) 0
 #define __builtin_frame_address(...) 0
 
-#ifdef WIN32
+#ifdef _WIN32
 
 #define XMD_H // prevent redefinition of INT32
 #undef FAR  // prevent FAR redefinition
 
 #endif
 
-#if defined WIN32 && defined __GNUC__
+#if defined _WIN32 && defined __GNUC__
 typedef unsigned char boolean;
 #endif
 

modules/imgcodecs/src/grfmt_jpeg2000.cpp

@@ -47,7 +47,7 @@
 #include "grfmt_jpeg2000.hpp"
 #include "opencv2/imgproc.hpp"
 
-#ifdef WIN32
+#ifdef _WIN32
 #define JAS_WIN_MSVC_BUILD 1
 #ifdef __GNUC__
 #define HAVE_STDINT_H 1
@@ -160,7 +160,7 @@ bool  Jpeg2KDecoder::readData( Mat& img )
     jas_stream_t* stream = (jas_stream_t*)m_stream;
     jas_image_t* image = (jas_image_t*)m_image;
 
-#ifndef WIN32
+#ifndef _WIN32
     // At least on some Linux instances the
     // system libjasper segfaults when
     // converting color to grey.
@@ -272,7 +272,7 @@ bool  Jpeg2KDecoder::readData( Mat& img )
 
     close();
 
-#ifndef WIN32
+#ifndef _WIN32
     if (!clr.empty())
     {
         cv::cvtColor(clr, img, COLOR_BGR2GRAY);

modules/imgcodecs/src/grfmt_tiff.cpp

@@ -732,7 +732,7 @@ bool  TiffEncoder::write( const Mat& img, const std::vector<int>& /*params*/)
     if( m_buf )
         m_buf->reserve( alignSize(stripCount*8 + fileStep*height + 256, 256) );
 
-/*#if defined _DEBUG || !defined WIN32
+/*#if defined _DEBUG || !defined _WIN32
     int uncompressedRowSize = rowsPerStrip * fileStep;
 #endif*/
     int directoryOffset = 0;

modules/imgcodecs/src/precomp.hpp

@@ -58,7 +58,7 @@
 #include <ctype.h>
 #include <assert.h>
 
-#if defined WIN32 || defined WINCE
+#if defined _WIN32 || defined WINCE
     #include <windows.h>
     #undef small
     #undef min