avoid undefined behavior from token paste resulting in more than one token

[wxWidgets.git] / src / common / image.cpp

diff --git a/src/common/image.cpp b/src/common/image.cpp
index 92bbdde513e35aa9b79f661b82216eaf62e860cc..e739d5c71e09b2a1e92a59d1e989fa7a4a2d7fff 100644 (file)
--- a/src/common/image.cpp
+++ b/src/common/image.cpp
@@ -538,13 +538,8 @@ wxImage wxImage::ResampleBox(int width, int height) const
     const int scale_factor_x_2 = (int)(scale_factor_x / 2);
     const int scale_factor_y_2 = (int)(scale_factor_y / 2);
 
-    // If we want good-looking results we need to pre-blur the image a bit first
-    wxImage src_image(*this);
-    src_image = src_image.BlurHorizontal(scale_factor_x_2);
-    src_image = src_image.BlurVertical(scale_factor_y_2);
-
-    unsigned char* src_data = src_image.GetData();
-    unsigned char* src_alpha = src_image.GetAlpha();
+    unsigned char* src_data = M_IMGDATA->m_data;
+    unsigned char* src_alpha = M_IMGDATA->m_alpha;
     unsigned char* dst_data = ret_image.GetData();
     unsigned char* dst_alpha = NULL;
 
@@ -576,7 +571,7 @@ wxImage wxImage::ResampleBox(int width, int height) const
                   j++ )
             {
                 // We don't care to average pixels that don't exist (edges)
-                if ( j < 0 || j > M_IMGDATA->m_height )
+                if ( j < 0 || j > M_IMGDATA->m_height - 1 )
                     continue;
 
                 for ( int i = int(src_x - scale_factor_x/2.0 + 1);
@@ -584,11 +579,11 @@ wxImage wxImage::ResampleBox(int width, int height) const
                       i++ )
                 {
                     // Don't average edge pixels
-                    if ( i < 0 || i > M_IMGDATA->m_width )
+                    if ( i < 0 || i > M_IMGDATA->m_width - 1 )
                         continue;
 
                     // Calculate the actual index in our source pixels
-                    src_pixel_index = src_y * M_IMGDATA->m_width + src_x;
+                    src_pixel_index = j * M_IMGDATA->m_width + i;
 
                     sum_r += src_data[src_pixel_index * 3 + 0];
                     sum_g += src_data[src_pixel_index * 3 + 1];
@@ -743,7 +738,7 @@ wxImage wxImage::ResampleBicubic(int width, int height) const
 }
 
 // Blur in the horizontal direction
-wxImage wxImage::BlurHorizontal(int blurRadius)
+wxImage wxImage::BlurHorizontal(int blurRadius) const
 {
     wxImage ret_image;
     ret_image.Create(M_IMGDATA->m_width, M_IMGDATA->m_height, false);
@@ -858,7 +853,7 @@ wxImage wxImage::BlurHorizontal(int blurRadius)
 }
 
 // Blur in the vertical direction
-wxImage wxImage::BlurVertical(int blurRadius)
+wxImage wxImage::BlurVertical(int blurRadius) const
 {
     wxImage ret_image;
     ret_image.Create(M_IMGDATA->m_width, M_IMGDATA->m_height, false);
@@ -973,7 +968,7 @@ wxImage wxImage::BlurVertical(int blurRadius)
 }
 
 // The new blur function
-wxImage wxImage::Blur(int blurRadius)
+wxImage wxImage::Blur(int blurRadius) const
 {
     wxImage ret_image;
     ret_image.Create(M_IMGDATA->m_width, M_IMGDATA->m_height, false);
@@ -2338,7 +2333,7 @@ wxImageHandler *wxImage::FindHandler( const wxString& name )
 
         node = node->GetNext();
     }
-    return 0;
+    return NULL;
 }
 
 wxImageHandler *wxImage::FindHandler( const wxString& extension, long bitmapType )
@@ -2352,7 +2347,7 @@ wxImageHandler *wxImage::FindHandler( const wxString& extension, long bitmapType
             return handler;
         node = node->GetNext();
     }
-    return 0;
+    return NULL;
 }
 
 wxImageHandler *wxImage::FindHandler( long bitmapType )
@@ -2364,7 +2359,7 @@ wxImageHandler *wxImage::FindHandler( long bitmapType )
         if (handler->GetType() == bitmapType) return handler;
         node = node->GetNext();
     }
-    return 0;
+    return NULL;
 }
 
 wxImageHandler *wxImage::FindHandlerMime( const wxString& mimetype )
@@ -2376,7 +2371,7 @@ wxImageHandler *wxImage::FindHandlerMime( const wxString& mimetype )
         if (handler->GetMimeType().IsSameAs(mimetype, false)) return handler;
         node = node->GetNext();
     }
-    return 0;
+    return NULL;
 }
 
 void wxImage::InitStandardHandlers()