X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/b737ad10dec946cd7d5e38c43c666e8efe89f0ae..823c4e96f9656176562b5baf7d1b64a8a3dfb3d8:/include/wx/image.h?ds=sidebyside

diff --git a/include/wx/image.h b/include/wx/image.h
index 61f54d16cf..36843a4122 100644
--- a/include/wx/image.h
+++ b/include/wx/image.h
@@ -14,7 +14,7 @@
 #pragma interface "image.h"
 #endif
 
-#include "wx/setup.h"
+#include "wx/defs.h"
 #include "wx/object.h"
 #include "wx/string.h"
 #include "wx/gdicmn.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
 //-----------------------------------------------------------------------------
@@ -182,9 +189,9 @@ public:
 
     // Paste the image or part of this image into an image of the given size at the pos
     //  any newly exposed areas will be filled with the rgb colour
-    //  by default if r = g = b = -1 then fill with this image's mask colour or find and 
+    //  by default if r = g = b = -1 then fill with this image's mask colour or find and
     //  set a suitable mask colour
-    wxImage Size( const wxSize& size, const wxPoint& pos, 
+    wxImage Size( const wxSize& size, const wxPoint& pos,
                   int r = -1, int g = -1, int b = -1 ) const;
 
     // pastes image into this instance and takes care of
@@ -200,7 +207,7 @@ public:
     wxImage& Rescale( int width, int height ) { return *this = Scale(width, height); }
 
     // resizes the image in place
-    wxImage& Resize( const wxSize& size, const wxPoint& pos, 
+    wxImage& Resize( const wxSize& size, const wxPoint& pos,
                      int r = -1, int g = -1, int b = -1 ) { return *this = Size(size, pos, r, g, b); }
 
     // Rotates the image about the given point, 'angle' radians.
@@ -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;