From 03361f20a2c8bb4ba5924bbcfbb79edce28fc20a Mon Sep 17 00:00:00 2001
From: Jeffrey Pfau <jeffrey@endrift.com>
Date: Wed, 1 May 2013 02:32:56 -0700
Subject: [PATCH] Start drawing backdrop

---
 src/gba/renderers/video-software.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/src/gba/renderers/video-software.c b/src/gba/renderers/video-software.c
index 3f43ecdde..0194a5575 100644
--- a/src/gba/renderers/video-software.c
+++ b/src/gba/renderers/video-software.c
@@ -204,11 +204,20 @@ static void GBAVideoSoftwareRendererDrawScanline(struct GBAVideoRenderer* render
 			row[x] = GBA_COLOR_WHITE;
 		}
 		return;
+	} else {
+		uint32_t backdrop;
+		if (!softwareRenderer->target1Bd || softwareRenderer->blendEffect == BLEND_NONE || softwareRenderer->blendEffect == BLEND_ALPHA) {
+			backdrop = softwareRenderer->normalPalette[0];
+		} else {
+			backdrop = softwareRenderer->variantPalette[0];
+		}
+		for (int x = 0; x < VIDEO_HORIZONTAL_PIXELS; ++x) {
+			row[x] = backdrop;
+		}
 	}
 
 	memset(softwareRenderer->flags, 0, sizeof(softwareRenderer->flags));
 	memset(softwareRenderer->spriteLayer, 0, sizeof(softwareRenderer->spriteLayer));
-	memset(row, 0, sizeof(*row) * VIDEO_HORIZONTAL_PIXELS);
 	softwareRenderer->row = row;
 
 	softwareRenderer->start = 0;