fix wxMBConv_iconv to respect the base class conventions: when the input is NUL-termi...

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

diff --git a/src/common/image.cpp b/src/common/image.cpp
index 6df19503b26ffa72badadeb68bd058ad8d3cead8..cf7eb9538bc0486ba271b2ac3ac54776c59fa2d6 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);
@@ -1288,6 +1283,26 @@ void wxImage::Paste( const wxImage &image, int x, int y )
         return;
     }
 
+    // Copy over the alpha channel from the original image
+    if ( image.HasAlpha() )
+    {
+        if ( !HasAlpha() )
+            InitAlpha();
+
+        unsigned char* source_data = image.GetAlpha() + xx + yy*image.GetWidth();
+        int source_step = image.GetWidth();
+
+        unsigned char* target_data = GetAlpha() + (x+xx) + (y+yy)*M_IMGDATA->m_width;
+        int target_step = M_IMGDATA->m_width;
+
+        for (int j = 0; j < height; j++,
+                                    source_data += source_step,
+                                    target_data += target_step)
+        {
+            memcpy( target_data, source_data, width );
+        }
+    }
+
     if (!HasMask() && image.HasMask())
     {
         unsigned char r = image.GetMaskRed();
@@ -1665,7 +1680,9 @@ void wxImage::SetAlpha( unsigned char *alpha, bool static_data )
         alpha = (unsigned char *)malloc(M_IMGDATA->m_width*M_IMGDATA->m_height);
     }
 
-    free(M_IMGDATA->m_alpha);
+    if( !M_IMGDATA->m_staticAlpha )
+        free(M_IMGDATA->m_alpha);
+
     M_IMGDATA->m_alpha = alpha;
     M_IMGDATA->m_staticAlpha = static_data;
 }
@@ -1898,8 +1915,11 @@ bool wxImage::ConvertAlphaToMask(unsigned char threshold)
         }
     }
 
-    free(M_IMGDATA->m_alpha);
+    if( !M_IMGDATA->m_staticAlpha )
+        free(M_IMGDATA->m_alpha);
+
     M_IMGDATA->m_alpha = NULL;
+    M_IMGDATA->m_staticAlpha = false;
 
     return true;
 }
@@ -2046,8 +2066,7 @@ bool wxImage::SaveFile( const wxString& filename ) const
     wxImageHandler * pHandler = FindHandler(ext, -1);
     if (pHandler)
     {
-        SaveFile(filename, pHandler->GetType());
-        return true;
+        return SaveFile(filename, pHandler->GetType());
     }
 
     wxLogError(_("Can't save image to file '%s': unknown extension."), filename.c_str());
@@ -2139,13 +2158,19 @@ int wxImage::GetImageCount( wxInputStream &stream, long type )
 
     if ( type == wxBITMAP_TYPE_ANY )
     {
-        wxList &list=GetHandlers();
+        const wxList& list = GetHandlers();
 
-        for (wxList::compatibility_iterator node = list.GetFirst(); node; node = node->GetNext())
+        for ( wxList::compatibility_iterator node = list.GetFirst();
+              node;
+              node = node->GetNext() )
         {
-             handler=(wxImageHandler*)node->GetData();
+             handler = (wxImageHandler*)node->GetData();
              if ( handler->CanRead(stream) )
-                 return handler->GetImageCount(stream);
+             {
+                 const int count = handler->GetImageCount(stream);
+                 if ( count >= 0 )
+                     return count;
+             }
 
         }
 
@@ -2182,17 +2207,22 @@ bool wxImage::LoadFile( wxInputStream& stream, long type, int index )
 
     if ( type == wxBITMAP_TYPE_ANY )
     {
-        wxList &list=GetHandlers();
-
-        for ( wxList::compatibility_iterator node = list.GetFirst(); node; node = node->GetNext() )
+        const wxList& list = GetHandlers();
+        for ( wxList::compatibility_iterator node = list.GetFirst();
+              node;
+              node = node->GetNext() )
         {
-             handler=(wxImageHandler*)node->GetData();
-             if ( handler->CanRead(stream) )
-                 return handler->LoadFile(this, stream, true/*verbose*/, index);
+             handler = (wxImageHandler*)node->GetData();
+             if ( handler->CanRead(stream) &&
+                    handler->LoadFile(this, stream, true/*verbose*/, index) )
+             {
+                 return true;
+             }
 
         }
 
         wxLogWarning( _("No handler found for image type.") );
+
         return false;
     }
 
@@ -2333,7 +2363,7 @@ wxImageHandler *wxImage::FindHandler( const wxString& name )
 
         node = node->GetNext();
     }
-    return 0;
+    return NULL;
 }
 
 wxImageHandler *wxImage::FindHandler( const wxString& extension, long bitmapType )
@@ -2347,7 +2377,7 @@ wxImageHandler *wxImage::FindHandler( const wxString& extension, long bitmapType
             return handler;
         node = node->GetNext();
     }
-    return 0;
+    return NULL;
 }
 
 wxImageHandler *wxImage::FindHandler( long bitmapType )
@@ -2359,7 +2389,7 @@ wxImageHandler *wxImage::FindHandler( long bitmapType )
         if (handler->GetType() == bitmapType) return handler;
         node = node->GetNext();
     }
-    return 0;
+    return NULL;
 }
 
 wxImageHandler *wxImage::FindHandlerMime( const wxString& mimetype )
@@ -2371,7 +2401,7 @@ wxImageHandler *wxImage::FindHandlerMime( const wxString& mimetype )
         if (handler->GetMimeType().IsSameAs(mimetype, false)) return handler;
         node = node->GetNext();
     }
-    return 0;
+    return NULL;
 }
 
 void wxImage::InitStandardHandlers()