From c0623dcfadb00843e43c0f8cdcb8898bfc1f08f5 Mon Sep 17 00:00:00 2001
From: notaz <notasas@gmail.com>
Date: Sun, 3 Jun 2007 19:09:15 +0000
Subject: [PATCH] sprite hit hack, softscale fix

git-svn-id: file:///home/notaz/opt/svn/fceu@152 be3aeb3a-fb24-0410-a615-afba39da0efa
---
 drivers/gp2x/asmutils.s   | 28 +++++++++++++++++-----------
 drivers/gp2x/gp2x-video.c |  5 -----
 fce.c                     | 10 +++++++++-
 3 files changed, 26 insertions(+), 17 deletions(-)

diff --git a/drivers/gp2x/asmutils.s b/drivers/gp2x/asmutils.s
index 4b9e699..9df1b2c 100644
--- a/drivers/gp2x/asmutils.s
+++ b/drivers/gp2x/asmutils.s
@@ -117,7 +117,7 @@ mst32_fin:
     bx      lr
 
 
-
+@ warning: this code relies on palette being strictly RGB555, i.e. bit5=0
 .global soft_scale @ void *dst, unsigned short *pal, int line_offs, int lines
 
 soft_scale:
@@ -161,10 +161,14 @@ soft_scale_loop_line:
     ldrh    r6, [r3, r6]
     and     r12,lr, r12,lsr #23
     ldrh    r12,[r3, r12]
-    bic     r11,r6, #0x0820
-    bic     r5, r5, #0x0820
-    add     r5, r5, r11
-    mov     r5, r5, lsr #1
+
+    mov     r11,r6, ror #11
+    adds    r5, r11,r5, ror #11
+    mov     r5, r5, ror #22
+    bic     r5, r5, #0xff000000
+    bic     r5, r5, #0x0420           @ set the green bits as they should be
+    orrcs   r5, r5, #0x0400
+
     and     r11,r6, r9, lsl #2
     sub     r6, r6, r11,lsr #2        @ r6 = 3/4 pix_s 2
     orr     r5, r5, r6, lsl #16
@@ -183,14 +187,16 @@ soft_scale_loop_line:
     sub     r8, r12,r11,lsr #2        @ r8 = 3/4 pix_s 1
     and     r11,r6, r9, lsl #18
     add     r8, r8, r11,lsr #18
-    mov     r8, r8, lsl #16
     and     r7, lr, r7, lsr #23
     ldrh    r7, [r3, r7]
-    bic     r11,r10,#0x0820
-    bic     r12,r12,#0x0820
-    add     r12,r12,r11
-    add     r8, r8, r12,lsr #1        @ pix_d 6, 7
-    mov     r8, r8, ror #16
+
+    mov     r11,r10,ror #11
+    adds    r12,r11,r12,ror #11
+    mov     r12,r12,ror #22
+    bic     r12,r12,#0x0420
+    orrcs   r12,r12,#0x0400
+    orr     r8, r8, r12,lsl #16       @ pix_d 6, 7
+
     and     r11,r10,r9, lsl #2
     sub     r10,r10,r11,lsr #2        @ r10= 3/4 pix_s 2
     and     r11,r7, r9, lsl #2
diff --git a/drivers/gp2x/gp2x-video.c b/drivers/gp2x/gp2x-video.c
index e702239..9b73e46 100644
--- a/drivers/gp2x/gp2x-video.c
+++ b/drivers/gp2x/gp2x-video.c
@@ -99,11 +99,6 @@ int InitVideo(void)
 }
 
 
-void ToggleFS(void)
-{
-}
-
-
 // 16: rrrr rggg gggb bbbb
 void FCEUD_SetPalette(uint8 index, uint8 r, uint8 g, uint8 b)
 {
diff --git a/fce.c b/fce.c
index 6e30c00..d3b5c63 100644
--- a/fce.c
+++ b/fce.c
@@ -604,17 +604,25 @@ void FCEUI_FrameSkip(int x)
 static void LineUpdate(uint8 *target)
 {
 	uint32 tem;
+	int y;
 
 	/* PRefreshLine() will not get called on skipped frames.  This
 	 * could cause a problem, but the solution would be rather complex,
 	 * due to the current sprite 0 hit code.
 	 */
-	if(FSkip) return;
+	if(FSkip)
+	{
+	 y=(int)SPRAM[0] + 1;
+	 if(scanline==y && SpriteON) PPU_status|=0x40; // hack
+	 return;
+	}
 
 	if(scanline < FSettings.FirstSLine || scanline > FSettings.LastSLine)
 	{
 	   if(PPU_hook)
  	    PRefreshLine();
+	   y=(int)SPRAM[0] + 1;
+	   if(scanline==y && SpriteON) PPU_status|=0x40;
 	}
 	else
 	{
-- 
2.39.2