Make wxGCDC::GetGraphicsContext() const.

[wxWidgets.git] / include / wx / image.h

diff --git a/include/wx/image.h b/include/wx/image.h
index eb0d19b7db11608bc6e5774d252cd61f40c505cb..e9fb5c54694005d4fb7621610723e28bf0ff4f08 100644 (file)
--- a/include/wx/image.h
+++ b/include/wx/image.h
@@ -62,12 +62,13 @@ enum wxImageResizeQuality
     wxIMAGE_QUALITY_NEAREST = 0,
     wxIMAGE_QUALITY_BILINEAR = 1,
     wxIMAGE_QUALITY_BICUBIC = 2,
+    wxIMAGE_QUALITY_BOX_AVERAGE = 3,
 
     // default quality is low (but fast)
     wxIMAGE_QUALITY_NORMAL = wxIMAGE_QUALITY_NEAREST,
 
     // highest (but best) quality
-    wxIMAGE_QUALITY_HIGH = wxIMAGE_QUALITY_BICUBIC
+    wxIMAGE_QUALITY_HIGH
 };
 
 // alpha channel values: fully transparent, default threshold separating
@@ -347,6 +348,7 @@ public:
                    bool interpolating = true, wxPoint * offset_after_rotation = NULL) const;
 
     wxImage Rotate90( bool clockwise = true ) const;
+    wxImage Rotate180() const;
     wxImage Mirror( bool horizontally = true ) const;
 
     // replace one colour with another
@@ -354,13 +356,17 @@ public:
                   unsigned char r2, unsigned char g2, unsigned char b2 );
 
     // Convert to greyscale image. Uses the luminance component (Y) of the image.
-    // The luma value (YUV) is calculated using (R * lr) + (G * lg) + (B * lb), defaults to ITU-T BT.601
-    wxImage ConvertToGreyscale( double lr = 0.299, double lg = 0.587, double lb = 0.114 ) const;
+    // The luma value (YUV) is calculated using (R * weight_r) + (G * weight_g) + (B * weight_b), defaults to ITU-T BT.601
+    wxImage ConvertToGreyscale(double weight_r, double weight_g, double weight_b) const;
+    wxImage ConvertToGreyscale(void) const;
 
     // convert to monochrome image (<r,g,b> will be replaced by white,
     // everything else by black)
     wxImage ConvertToMono( unsigned char r, unsigned char g, unsigned char b ) const;
 
+    // Convert to disabled (dimmed) image.
+    wxImage ConvertToDisabled(unsigned char brightness = 255) const;
+
     // these routines are slow but safe
     void SetRGB( int x, int y, unsigned char r, unsigned char g, unsigned char b );
     void SetRGB( const wxRect& rect, unsigned char r, unsigned char g, unsigned char b );
@@ -384,7 +390,7 @@ public:
     // automatically or using the specified colour for the mask), if it has
     // any, does nothing otherwise:
     bool ConvertAlphaToMask(unsigned char threshold = wxIMAGE_ALPHA_THRESHOLD);
-    void ConvertAlphaToMask(unsigned char mr, unsigned char mg, unsigned char mb,
+    bool ConvertAlphaToMask(unsigned char mr, unsigned char mg, unsigned char mb,
                             unsigned char threshold = wxIMAGE_ALPHA_THRESHOLD);
 
 
@@ -447,6 +453,7 @@ public:
     bool HasAlpha() const { return GetAlpha() != NULL; }
     void SetAlpha(unsigned char *alpha = NULL, bool static_data=false);
     void InitAlpha();
+    void ClearAlpha();
 
     // return true if this pixel is masked or has alpha less than specified
     // threshold
@@ -555,15 +562,15 @@ public:
         }
     )
 
-    wxDEPRECATED(
-        static wxImageHandler *FindHandler(const wxString& ext, long type)
+    static wxDEPRECATED(
+        wxImageHandler *FindHandler(const wxString& ext, long type)
         {
             return FindHandler(ext, (wxBitmapType)type);
         }
     )
 
-    wxDEPRECATED(
-        static wxImageHandler *FindHandler(long imageType)
+    static wxDEPRECATED(
+        wxImageHandler *FindHandler(long imageType)
         {
             return FindHandler((wxBitmapType)imageType);
         }
@@ -585,6 +592,24 @@ protected:
 private:
     friend class WXDLLIMPEXP_FWD_CORE wxImageHandler;
 
+    // Possible values for MakeEmptyClone() flags.
+    enum
+    {
+        // Create an image with the same orientation as this one. This is the
+        // default and only exists for symmetry with SwapOrientation.
+        Clone_SameOrientation = 0,
+
+        // Create an image with the same height as this image width and the
+        // same width as this image height.
+        Clone_SwapOrientation = 1
+    };
+
+    // Returns a new blank image with the same dimensions (or with width and
+    // height swapped if Clone_SwapOrientation flag is given), alpha, and mask
+    // as this image itself. This is used by several functions creating
+    // modified versions of this image.
+    wxImage MakeEmptyClone(int flags = Clone_SameOrientation) const;
+
 #if wxUSE_STREAMS
     // read the image from the specified stream updating image type if
     // successful