--- uae/src/include/drawing.h	2018/04/24 16:45:11	1.1.1.3
+++ uae/src/include/drawing.h	2018/04/24 16:47:42	1.1.1.4
@@ -29,6 +29,14 @@
 #define MAX_PLANES 6
 #endif
 
+#define RES_LORES 0
+#define RES_HIRES 1
+#define RES_SUPERHIRES 2
+
+/* calculate shift depending on resolution (replaced "decided_hires ? 4 : 8") (TW) */
+#define RES_SHIFT(res) ((res) == RES_LORES ? 8 : (res) == RES_HIRES ? 4 : 2)
+#define RES_ADJUST(res) ((res) == RES_LORES ? 8 : (res) == RES_HIRES ? 4 : 2)
+
 /* We ignore that many lores pixels at the start of the display. These are
  * invisible anyway due to hardware DDF limits. */
 #define DISPLAY_LEFT_SHIFT 0x38
@@ -89,7 +97,7 @@ struct delay_change {
 };
 
 /* Way too much... */
-#define MAX_REG_CHANGE ((maxvpos+1) * 2 * maxhpos)
+#define MAX_REG_CHANGE ((MAXVPOS + 1) * 2 * MAXHPOS)
 
 #ifdef OS_WITHOUT_MEMORY_MANAGEMENT
 extern struct sprite_draw  *sprite_positions[2];
@@ -103,7 +111,7 @@ extern struct color_change color_changes
 extern struct delay_change delay_changes[MAX_REG_CHANGE];
 #endif
 
-extern struct color_entry color_tables[2][(maxvpos+1) * 2];
+extern struct color_entry color_tables[2][(MAXVPOS+1) * 2];
 extern struct color_entry *curr_color_tables, *prev_color_tables;
 
 extern struct sprite_draw *curr_sprite_positions, *prev_sprite_positions;
@@ -141,10 +149,10 @@ struct draw_info {
     int nr_color_changes, nr_sprites;
 };
 
-extern struct decision line_decisions[2 * (maxvpos+1) + 1];
-extern struct draw_info line_drawinfo[2][2 * (maxvpos+1) + 1];
+extern struct decision line_decisions[2 * (MAXVPOS+1) + 1];
+extern struct draw_info line_drawinfo[2][2 * (MAXVPOS+1) + 1];
 
-extern uae_u8 line_data[(maxvpos+1) * 2][MAX_PLANES * MAX_WORDS_PER_LINE * 2];
+extern uae_u8 line_data[(MAXVPOS+1) * 2][MAX_PLANES * MAX_WORDS_PER_LINE * 2];
 
 /* Functions in drawing.c.  */
 extern int coord_native_to_amiga_y (int);