X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/2ecf902bc836f2808444b34eff48cdb12f289460..e12a951e754d0e6a67a211a1d8fb788e0a166094:/include/wx/image.h

diff --git a/include/wx/image.h b/include/wx/image.h
index 665d89534e..36843a4122 100644
--- a/include/wx/image.h
+++ b/include/wx/image.h
@@ -46,6 +46,13 @@ enum
     wxIMAGE_RESOLUTION_CM = 2
 };
 
+// alpha channel values: fully transparent, default threshold separating
+// transparent pixels from opaque for a few functions dealing with alpha and
+// fully opaque
+const unsigned char wxIMAGE_ALPHA_TRANSPARENT = 0;
+const unsigned char wxIMAGE_ALPHA_THRESHOLD = 0x80;
+const unsigned char wxIMAGE_ALPHA_OPAQUE = 0xff;
+
 //-----------------------------------------------------------------------------
 // classes
 //-----------------------------------------------------------------------------
@@ -240,7 +247,7 @@ public:
 
     // converts image's alpha channel to mask, if it has any, does nothing
     // otherwise:
-    bool ConvertAlphaToMask(unsigned char threshold = 128);
+    bool ConvertAlphaToMask(unsigned char threshold = wxIMAGE_ALPHA_THRESHOLD);
 
     // This method converts an image where the original alpha
     // information is only available as a shades of a colour
@@ -282,14 +289,19 @@ public:
     // these functions provide fastest access to wxImage data but should be
     // used carefully as no checks are done
     unsigned char *GetData() const;
-    void SetData( unsigned char *data );
-    void SetData( unsigned char *data, int new_width, int new_height );
+    void SetData( unsigned char *data, bool static_data=false );
+    void SetData( unsigned char *data, int new_width, int new_height, bool static_data=false );
 
     unsigned char *GetAlpha() const;    // may return NULL!
     bool HasAlpha() const { return GetAlpha() != NULL; }
-    void SetAlpha(unsigned char *alpha = NULL);
+    void SetAlpha(unsigned char *alpha = NULL, bool static_data=false);
     void InitAlpha();
 
+    // return true if this pixel is masked or has alpha less than specified
+    // threshold
+    bool IsTransparent(int x, int y,
+                       unsigned char threshold = wxIMAGE_ALPHA_THRESHOLD) const;
+
     // Mask functions
     void SetMaskColour( unsigned char r, unsigned char g, unsigned char b );
     // Get the current mask colour or find a suitable colour
@@ -354,6 +366,12 @@ public:
 protected:
     static wxList   sm_handlers;
 
+    // return the index of the point with the given coordinates or -1 if the
+    // image is invalid of the coordinates are out of range
+    //
+    // note that index must be multiplied by 3 when using it with RGB array
+    long XYToIndex(int x, int y) const;
+
 private:
     friend class WXDLLEXPORT wxImageHandler;