X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?a=blobdiff_plain;f=src%2Ffreeglut_internal.h;h=cea8ad81d3b7929301a0a6712f3fac6b86ba77a4;hb=34290224a4fea01b30fe3c83d3c6d00bd5945acd;hp=7ffb4b68ef4d328f83592a1dcd46104d22c03acc;hpb=612f817ef1b975ede61b5cd6b880822b66207b76;p=freeglut

diff --git a/src/freeglut_internal.h b/src/freeglut_internal.h
index 7ffb4b6..cea8ad8 100644
--- a/src/freeglut_internal.h
+++ b/src/freeglut_internal.h
@@ -36,12 +36,12 @@
 /*
  * Freeglut is meant to be available under all Unix/X11 and Win32 platforms.
  */
-#if !defined(_WIN32)
-#   define  TARGET_HOST_UNIX_X11    1
-#   define  TARGET_HOST_WIN32       0
-#else
+#if defined(_MSC_VER) || defined(__CYGWIN__) || defined(__MINGW32__)
 #   define  TARGET_HOST_UNIX_X11    0
 #   define  TARGET_HOST_WIN32       1
+#else
+#   define  TARGET_HOST_UNIX_X11    1
+#   define  TARGET_HOST_WIN32       0
 #endif
 
 #define  FREEGLUT_MAX_MENUS         3
@@ -61,7 +61,10 @@
 #if TARGET_HOST_WIN32
 #include <windows.h>
 #include <windowsx.h>
+#include <mmsystem.h>
+#endif
 
+#if defined(_MSC_VER)
 #define strdup   _strdup
 #endif
 
@@ -373,6 +376,30 @@ struct tagSFG_WindowState
 
 
 /*
+ * SET_WCB() is used as:
+ *
+ *     SET_WCB( window, Visibility, func );
+ *
+ * ...where {window} is the freeglut window to set the callback,
+ *          {Visibility} is the window-specific callback to set,
+ *          {func} is a function-pointer.
+ *
+ * Originally, {FETCH_WCB( ... ) = func} was rather sloppily used,
+ * but this can cause warnings because the FETCH_WCB() macro type-
+ * casts its result, and a type-cast value shouldn't be an lvalue.
+ *
+ * The {if( FETCH_WCB( ... ) != func )} test is to do type-checking
+ * and for no other reason.  Since it's hidden in the macro, the
+ * ugliness is felt to be rather benign.
+ */
+#define SET_WCB(window,cbname,func)                   \
+do                                                    \
+{                                                     \
+    if( FETCH_WCB( window, cbname ) != func )         \
+        (((window).CallBacks[CB_ ## cbname]) = func); \
+} while( 0 )                                          \
+
+/*
  * FETCH_WCB() is used as:
  *
  *     FETCH_WCB( window, Visibility );