From 6a7c3d158975fdab961813cae1cd113d321414aa Mon Sep 17 00:00:00 2001
From: Nathan Woods <npwoods@mess.org>
Date: Mon, 17 Mar 2008 12:47:22 +0000
Subject: [PATCH] Added a crosshair_set_screen() to allow drivers to control
 which screen(s) on which crosshairs are displayed.

---
 src/emu/crsshair.c | 14 +++++++++++++-
 src/emu/crsshair.h | 17 +++++++++++++++++
 2 files changed, 30 insertions(+), 1 deletion(-)

diff --git a/src/emu/crsshair.c b/src/emu/crsshair.c
index 298db143a70..da6d084abee 100644
--- a/src/emu/crsshair.c
+++ b/src/emu/crsshair.c
@@ -332,7 +332,8 @@ void crosshair_render(const device_config *screen)
 
 	for (player = 0; player < MAX_PLAYERS; player++)
 		/* draw if visible and the right screen */
-		if (global.visible[player] && (global.screen[player] == screen))
+		if (global.visible[player] &&
+			((global.screen[player] == screen) || (global.screen[player] == CROSSHAIR_SCREEN_ALL)))
 		{
 			/* add a quad assuming a 4:3 screen (this is not perfect) */
 			render_screen_add_quad(screen,
@@ -342,3 +343,14 @@ void crosshair_render(const device_config *screen)
 						global.texture[player], PRIMFLAG_BLENDMODE(BLENDMODE_ALPHA));
 		}
 }
+
+
+/*-------------------------------------------------
+    crosshair_set_screen - sets the screen(s) for a
+    given player's crosshair
+-------------------------------------------------*/
+
+void crosshair_set_screen(running_machine *machine, int player, const device_config *screen)
+{
+	global.screen[player] = screen;
+}
diff --git a/src/emu/crsshair.h b/src/emu/crsshair.h
index 48418ef2e2f..691784546b1 100644
--- a/src/emu/crsshair.h
+++ b/src/emu/crsshair.h
@@ -15,6 +15,19 @@
 #define __CRSSHAIR_H__
 
 
+/***************************************************************************
+    CONSTANTS
+***************************************************************************/
+
+#define CROSSHAIR_SCREEN_NONE	((const device_config *) 0)
+#define CROSSHAIR_SCREEN_ALL	((const device_config *) ~0)
+
+
+
+/***************************************************************************
+    FUNCTION PROTOTYPES
+***************************************************************************/
+
 /* initializes the crosshair system */
 void crosshair_init(running_machine *machine);
 
@@ -24,5 +37,9 @@ void crosshair_render(const device_config *screen);
 /* toggles crosshair visibility */
 void crosshair_toggle(running_machine *machine);
 
+/* sets the screen(s) for a given player's crosshair */
+void crosshair_set_screen(running_machine *machine, int player, const device_config *screen);
+
+
 
 #endif	/* __CRSSHAIR_H__ */