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-rw-r--r--FL/Fl_System_Driver.H2
1 files changed, 2 insertions, 0 deletions
diff --git a/FL/Fl_System_Driver.H b/FL/Fl_System_Driver.H
index 2f52f10ba..5073be7ec 100644
--- a/FL/Fl_System_Driver.H
+++ b/FL/Fl_System_Driver.H
@@ -145,6 +145,8 @@ public:
virtual int preferences_need_protection_check() {return 0;}
// implement to support Fl_Plugin_Manager::load()
virtual void *dlopen(const char *filename) {return NULL;}
+ // the default implementation is most probably enough
+ virtual void png_extra_rgba_processing(unsigned char *array, int w, int h) {}
};
#endif // FL_SYSTEM_DRIVER_H