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Re: [ft-devel] Freetype Api compatibility is broken

From: Werner LEMBERG
Subject: Re: [ft-devel] Freetype Api compatibility is broken
Date: Sat, 04 Jun 2005 07:25:50 +0200 (CEST)

> [...] this code no longer compiles with freetype from cvs because of
> the "const" patch that applied.  [...]
> I thought Freetype supposed to maintain a stable api for minor
> releases, maybe this is no longer the case?

As mentioned in another mail, I've reverted the `const' changes for
the following function pointers:

  In ftimage.h:


  In ftrender.h:

In general I think it is a good idea to use `const' as much as
possible.  Doing a comparison between 2.1.9 and the current cvs, I
find the following differences in public header files which I would
like to retain, but I'm not sure whether it is possible to have
backwards compatibility.  Please advise.

   FT_Vector_Transform( FT_Vector*  vec,
-                       FT_Matrix*  matrix );
+                       const FT_Matrix*  matrix );

   typedef struct  FT_Raster_Params_
-    FT_Bitmap*              target;
-    void*                   source;
+    const FT_Bitmap*        target;
+    const void*             source;

-  FT_Outline_Get_CBox( FT_Outline*  outline,
+  FT_Outline_Get_CBox( const FT_Outline*  outline,
                        FT_BBox     *acbox );

-  FT_Outline_Translate( FT_Outline*  outline,
+  FT_Outline_Translate( const FT_Outline*  outline,
                         FT_Pos       xOffset,
                         FT_Pos       yOffset );

-  FT_Outline_Copy( FT_Outline*  source,
+  FT_Outline_Copy( const FT_Outline*  source,
                    FT_Outline  *target );

-  FT_Outline_Transform( FT_Outline*  outline,
-                        FT_Matrix*   matrix );
+  FT_Outline_Transform( const FT_Outline*  outline,
+                        const FT_Matrix*   matrix );

   FT_Outline_Get_Bitmap( FT_Library   library,
                          FT_Outline*  outline,
-                         FT_Bitmap   *abitmap );
+                         const FT_Bitmap  *abitmap );


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