Started work on the gradiation rectangle.

The handling in the operation engine should work pretty well. I would like to do some changes, however (displaying the bottomright of the rectangle, and use XOR for the vector, for example)
Now, i have to do the real thing, the gradiation calculation and drawing. But let's see that tomorrow...


git-svn-id: svn://pulkomandy.tk/GrafX2/trunk@299 416bcca6-2ee7-4201-b75f-2eb2f807beb1

boutons.h

@@ -64,9 +64,11 @@ void Bouton_Rectangle_plein(void);
 // Boutons relatifs aux dégradés
 void Bouton_Degrades(void);
 void Degrade_Charger_infos_du_tableau(int Indice);
+
 // Boutons relatifs aux cercles (ellipses) dégradé(e)s
 void Bouton_Cercle_degrade(void);
 void Bouton_Ellipse_degrade(void);
+void Bouton_Rectangle_degrade(void);
 
 // Boutons relatifs aux cercles (ellipses) plein(e)s et vides
 void Bouton_Cercle_vide(void);