Make GDALTransformerArg a typedef of an anonymous struct GDALTransfor…

…merArgOpaque*
rouault · Oct 8, 2024 · 2eb51d9 · 2eb51d9
1 parent 1aaac05
commit 2eb51d9
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diff --git a/MIGRATION_GUIDE.TXT b/MIGRATION_GUIDE.TXT
@@ -29,6 +29,15 @@ MIGRATION GUIDE FROM GDAL 3.9 to GDAL 3.10
 - New color interpretation (GCI_xxxx) items have been added to the GDALColorInterp
   enumeration. Code testing color interpretation may need to be adapted.
 
+- Out of tree code using GDALTransformer. "void* pTransformArg" arguments have
+  now become "GDALTransformerArg pTransformArg" where GDALTransformerArg is
+  a typedef to a point to an anonymous struct. Code doing things lie
+  static_cast<MyCustomTransformerInfo*>(...) must now use
+  reinterpret_cast<MyCustomTransformerInfo>(...)
+  and code returning a void* that is a transformer argument must use
+  reinterpret_cast<GDALTransformerArg>(...).
+
+
 MIGRATION GUIDE FROM GDAL 3.8 to GDAL 3.9
 -----------------------------------------
 

diff --git a/alg/gdal_alg.h b/alg/gdal_alg.h
@@ -97,7 +97,7 @@ CPLErr CPL_DLL CPL_STDCALL GDALSieveFilter(
  * All transformer arguments should have a GDALTransformerInfo member as their
  * first member.
  */
-typedef void *GDALTransformerArg;
+typedef struct GDALTransformerArgOpaque *GDALTransformerArg;
 
 typedef int (*GDALTransformerFunc)(GDALTransformerArg pTransformerArg,
                                    int bDstToSrc, int nPointCount, double *x,