recreating Xcode project files with new script

samples/image/canvas.cpp

@@ -36,6 +36,81 @@
 #include "canvas.h"
 
 
+// ============================================================================
+// implementations
+// ============================================================================
+
+class ImageRGBMatcher
+{
+public:
+    ImageRGBMatcher(const wxImage& image, int tolerance)
+        : m_image(image)
+        , m_tolerance(tolerance)
+    {
+    }
+
+    bool match(const wxImage& other)
+    {
+        if ( other.GetWidth() != m_image.GetWidth() )
+            return false;
+
+        if ( other.GetHeight() != m_image.GetHeight() )
+            return false;
+
+        if ( memcmp(other.GetData(), m_image.GetData(),
+                    other.GetWidth()*other.GetHeight()*3) == 0 )
+            return true;
+
+        const unsigned char* d1 = m_image.GetData();
+        const unsigned char* d2 = other.GetData();
+        for ( int x = 0; x < m_image.GetWidth(); ++x )
+        {
+            for ( int y = 0; y < m_image.GetHeight(); ++y )
+            {
+                const unsigned char diff = *d1 > * d2 ? *d1 - *d2 : *d2 - *d1;
+                if (diff > m_tolerance)
+                {
+                    m_diffDesc.Printf
+                               (
+                                    "first mismatch is at (%d, %d) which "
+                                    "has value 0x%06x instead of the "
+                                    "expected 0x%06x",
+                                    x, y, *d2, *d1
+                               );
+
+                    // Don't show all mismatches, there may be too many of them.
+                    return false;
+                }
+
+                ++d1;
+                ++d2;
+            }
+        }
+
+        // We can only get here when the images are different AND we've not exited the
+        // method from the loop. That implies the tolerance must have caused this.
+        wxASSERT_MSG(m_tolerance > 0, "Unreachable without tolerance");
+
+        return true;
+    }
+
+private:
+    const wxImage m_image;
+    const int m_tolerance;
+    mutable wxString m_diffDesc;
+};
+
+inline ImageRGBMatcher RGBSameAs(const wxImage& image)
+{
+    return ImageRGBMatcher(image, 0);
+}
+
+// Allows small differences (within given tolerance) for r, g, and b values.
+inline ImageRGBMatcher RGBSimilarTo(const wxImage& image, int tolerance)
+{
+    return ImageRGBMatcher(image, tolerance);
+}
+
 //-----------------------------------------------------------------------------
 // MyCanvas
 //-----------------------------------------------------------------------------
@@ -106,6 +181,16 @@ MyCanvas::MyCanvas( wxWindow *parent, wxWindowID id,
     else
     {
         my_toucan = wxBitmap(image);
+        bool result = false;
+        {
+                if( my_toucan.IsOk() )
+                {
+                    auto match = RGBSimilarTo( my_toucan.ConvertToImage() , 2 );
+                    result = match.match(image);
+                }
+
+        }
+
     }
 
     my_toucan_flipped_horiz = wxBitmap(image.Mirror(true));