From 6ad2b673b1110329517fc540952579ab8f8cc5e2 Mon Sep 17 00:00:00 2001
From: Jeffrey Pfau <jeffrey@endrift.com>
Date: Fri, 31 Jan 2014 22:40:21 -0800
Subject: [PATCH] Omit sprites that are off-screen vertically from OAM
 calculations

---
 src/gba/renderers/video-software.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/src/gba/renderers/video-software.c b/src/gba/renderers/video-software.c
index b3d655bb9..bb059cb5d 100644
--- a/src/gba/renderers/video-software.c
+++ b/src/gba/renderers/video-software.c
@@ -378,10 +378,12 @@ static void _cleanOAM(struct GBAVideoSoftwareRenderer* renderer) {
 			if (obj->transformed) {
 				height <<= ((struct GBATransformedObj*) obj)->doublesize;
 			}
-			renderer->sprites[oamMax].y = obj->y;
-			renderer->sprites[oamMax].endY = obj->y + height;
-			renderer->sprites[oamMax].obj = *obj;
-			++oamMax;
+			if (obj->y < VIDEO_VERTICAL_PIXELS || obj->y + height >= VIDEO_VERTICAL_TOTAL_PIXELS) {
+				renderer->sprites[oamMax].y = obj->y;
+				renderer->sprites[oamMax].endY = obj->y + height;
+				renderer->sprites[oamMax].obj = *obj;
+				++oamMax;
+			}
 		}
 	}
 	renderer->oamMax = oamMax;