From 5b959d28aac598c9312e30af1a80417944725232 Mon Sep 17 00:00:00 2001
From: davidhay <davidhay@localhost>
Date: Sat, 9 May 2009 11:43:03 +0000
Subject: [PATCH] put bilinear enable as a debug feature for now, it's pretty,
 but a little slow to be developing with :-)

---
 src/mame/drivers/naomi.c | 11 +++++++++++
 src/mame/video/dc.c      | 21 +++++++++++++++------
 2 files changed, 26 insertions(+), 6 deletions(-)

diff --git a/src/mame/drivers/naomi.c b/src/mame/drivers/naomi.c
index ff9db9c6239..2d53e180730 100644
--- a/src/mame/drivers/naomi.c
+++ b/src/mame/drivers/naomi.c
@@ -976,6 +976,13 @@ ADDRESS_MAP_END
 * Input ports
 */
 
+#define NAOMI_MAME_DEBUG_DIP \
+	PORT_START("MAMEDEBUG") \
+	PORT_DIPNAME( 0x01, 0x00, "Bilinear Filtering" ) \
+	PORT_DIPSETTING(    0x00, DEF_STR( Off ) ) \
+	PORT_DIPSETTING(    0x01, DEF_STR( On ) ) \
+
+
 /* for now we hardwire a joystick + 6 buttons for every game.*/
 static INPUT_PORTS_START( naomi )
 	PORT_START("IN0")
@@ -1011,6 +1018,8 @@ static INPUT_PORTS_START( naomi )
 	PORT_START("COINS")
 	PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_COIN1 ) PORT_CHANGED(dc_coin_slots_callback, &dc_coin_counts[0])
 	PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_COIN2 ) PORT_CHANGED(dc_coin_slots_callback, &dc_coin_counts[1])
+	
+	NAOMI_MAME_DEBUG_DIP
 INPUT_PORTS_END
 
 /* JVS mahjong panel */
@@ -1122,6 +1131,8 @@ static INPUT_PORTS_START( naomi_mp )
 	PORT_START("COINS")
 	PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_COIN1 ) PORT_CHANGED(dc_coin_slots_callback, &dc_coin_counts[0])
 	PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_COIN2 ) PORT_CHANGED(dc_coin_slots_callback, &dc_coin_counts[1])
+	
+	NAOMI_MAME_DEBUG_DIP
 INPUT_PORTS_END
 
 static MACHINE_RESET( naomi )
diff --git a/src/mame/video/dc.c b/src/mame/video/dc.c
index f324695f260..38202a8f825 100644
--- a/src/mame/video/dc.c
+++ b/src/mame/video/dc.c
@@ -34,6 +34,7 @@ static UINT32 dilated0[15][1024];
 static UINT32 dilated1[15][1024];
 static int dilatechose[64];
 static float wbuffer[480][640];
+static UINT32 debug_dip_status;
 
 UINT64 *dc_texture_ram;
 static UINT32 tafifo_buff[32];
@@ -1600,12 +1601,17 @@ void render_hline(bitmap_t *bitmap, texinfo *ti, int y, float xl, float xr, floa
 			}*/
 
 			c = ti->r(ti, u, v);
-			if(ti->filter_mode == TEX_FILTER_BILINEAR)
-			{
-				UINT32 c1 = ti->r(ti, u+1.0, v);
-				UINT32 c2 = ti->r(ti, u+1.0, v+1.0);
-				UINT32 c3 = ti->r(ti, u, v+1.0);
-				c = bilinear_filter(c, c1, c2, c3, u, v);
+			
+			// debug dip to turn on/off bilinear filtering, it's slooooow
+			if (debug_dip_status&0x1)
+			{	
+				if(ti->filter_mode == TEX_FILTER_BILINEAR)
+				{
+					UINT32 c1 = ti->r(ti, u+1.0, v);
+					UINT32 c2 = ti->r(ti, u+1.0, v+1.0);
+					UINT32 c3 = ti->r(ti, u, v+1.0);
+					c = bilinear_filter(c, c1, c2, c3, u, v);
+				}
 			}
 
 			if(c & 0xff000000) {
@@ -2107,6 +2113,9 @@ VIDEO_UPDATE(dc)
 		}
 	}
 
+	// update this here so we only do string lookup once per frame
+	debug_dip_status = input_port_read(screen->machine, "MAMEDEBUG");
+	
 	return 0;
 }