Add static to local function

modules/imgcodecs/src/loadsave.cpp

@@ -232,7 +232,57 @@ static ImageEncoder findEncoder( const String& _ext )
 
 enum { LOAD_CVMAT=0, LOAD_IMAGE=1, LOAD_MAT=2 };
 
-void RotateImage(const String& filename, Mat& img);
+static void RotateImage(const String& filename, Mat& img)
+{
+    int orientation = IMAGE_ORIENTATION_TL;
+
+    if (filename.size() > 0)
+    {
+        ExifReader reader( filename );
+        if( reader.parse() )
+        {
+            ExifEntry_t entry = reader.getTag( ORIENTATION );
+            if (entry.tag != INVALID_TAG)
+            {
+                orientation = entry.field_u16; //orientation is unsigned short, so check field_u16
+            }
+        }
+    }
+
+    switch( orientation )
+    {
+        case    IMAGE_ORIENTATION_TL: //0th row == visual top, 0th column == visual left-hand side
+            //do nothing, the image already has proper orientation
+            break;
+        case    IMAGE_ORIENTATION_TR: //0th row == visual top, 0th column == visual right-hand side
+            flip(img, img, 1); //flip horizontally
+            break;
+        case    IMAGE_ORIENTATION_BR: //0th row == visual bottom, 0th column == visual right-hand side
+            flip(img, img, -1);//flip both horizontally and vertically
+            break;
+        case    IMAGE_ORIENTATION_BL: //0th row == visual bottom, 0th column == visual left-hand side
+            flip(img, img, 0); //flip vertically
+            break;
+        case    IMAGE_ORIENTATION_LT: //0th row == visual left-hand side, 0th column == visual top
+            transpose(img, img);
+            break;
+        case    IMAGE_ORIENTATION_RT: //0th row == visual right-hand side, 0th column == visual top
+            transpose(img, img);
+            flip(img, img, 1); //flip horizontally
+            break;
+        case    IMAGE_ORIENTATION_RB: //0th row == visual right-hand side, 0th column == visual bottom
+            transpose(img, img);
+            flip(img, img, -1); //flip both horizontally and vertically
+            break;
+        case    IMAGE_ORIENTATION_LB: //0th row == visual left-hand side, 0th column == visual bottom
+            transpose(img, img);
+            flip(img, img, 0); //flip vertically
+            break;
+        default:
+            //by default the image read has normal (JPEG_ORIENTATION_TL) orientation
+            break;
+    }
+}
 
 /**
  * Read an image into memory and return the information
@@ -409,7 +459,7 @@ imreadmulti_(const String& filename, int flags, std::vector<Mat>& mats)
         if (!decoder->readData(mat))
         {
             // optionally rotate the data if EXIF' orientation flag says so
-            if( (flags & IMREAD_IGNORE_ORIENTATION) == 0 )
+            if( (flags & IMREAD_IGNORE_ORIENTATION) == 0 && flags != IMREAD_UNCHANGED )
             {
                 RotateImage(filename, mat);
             }
@@ -427,59 +477,6 @@ imreadmulti_(const String& filename, int flags, std::vector<Mat>& mats)
     return !mats.empty();
 }
 
-void RotateImage(const String& filename, Mat& img)
-{
-    int orientation = IMAGE_ORIENTATION_TL;
-
-    if (filename.size() > 0)
-    {
-        ExifReader reader( filename );
-        if( reader.parse() )
-        {
-            ExifEntry_t entry = reader.getTag( ORIENTATION );
-            if (entry.tag != INVALID_TAG)
-            {
-                orientation = entry.field_u16; //orientation is unsigned short, so check field_u16
-            }
-        }
-    }
-
-    switch( orientation )
-    {
-        case    IMAGE_ORIENTATION_TL: //0th row == visual top, 0th column == visual left-hand side
-            //do nothing, the image already has proper orientation
-            break;
-        case    IMAGE_ORIENTATION_TR: //0th row == visual top, 0th column == visual right-hand side
-            flip(img, img, 1); //flip horizontally
-            break;
-        case    IMAGE_ORIENTATION_BR: //0th row == visual bottom, 0th column == visual right-hand side
-            flip(img, img, -1);//flip both horizontally and vertically
-            break;
-        case    IMAGE_ORIENTATION_BL: //0th row == visual bottom, 0th column == visual left-hand side
-            flip(img, img, 0); //flip vertically
-            break;
-        case    IMAGE_ORIENTATION_LT: //0th row == visual left-hand side, 0th column == visual top
-            transpose(img, img);
-            break;
-        case    IMAGE_ORIENTATION_RT: //0th row == visual right-hand side, 0th column == visual top
-            transpose(img, img);
-            flip(img, img, 1); //flip horizontally
-            break;
-        case    IMAGE_ORIENTATION_RB: //0th row == visual right-hand side, 0th column == visual bottom
-            transpose(img, img);
-            flip(img, img, -1); //flip both horizontally and vertically
-            break;
-        case    IMAGE_ORIENTATION_LB: //0th row == visual left-hand side, 0th column == visual bottom
-            transpose(img, img);
-            flip(img, img, 0); //flip vertically
-            break;
-        default:
-            //by default the image read has normal (JPEG_ORIENTATION_TL) orientation
-            break;
-    }
-}
-
-
 /**
  * Read an image
  *
@@ -497,7 +494,7 @@ Mat imread( const String& filename, int flags )
     imread_( filename, flags, LOAD_MAT, &img );
 
     /// optionally rotate the data if EXIF' orientation flag says so
-    if( (flags & IMREAD_IGNORE_ORIENTATION) == 0 )
+    if( (flags & IMREAD_IGNORE_ORIENTATION) == 0 && flags != IMREAD_UNCHANGED )
     {
         RotateImage(filename, img);
     }