# HG changeset patch
# User Sam Lantinga <slouken@libsdl.org>
# Date 1001881160 0
# Node ID 401f0134f4f9c26dfe6dc5a26d249328d3f8c714
# Parent  ddee60057806cd4eac416a14b286d988faeb11a6
Fixed crash when using double-buffering with DGA

diff -r ddee60057806 -r 401f0134f4f9 src/video/dga/SDL_dgavideo.c
--- a/src/video/dga/SDL_dgavideo.c	Sun Sep 30 19:07:56 2001 +0000
+++ b/src/video/dga/SDL_dgavideo.c	Sun Sep 30 20:19:20 2001 +0000
@@ -531,7 +531,6 @@
 			flip_address[1] = memory_base+screen_len;
 			surfaces_mem += screen_len;
 			surfaces_len -= screen_len;
-			DGA_FlipHWSurface(this, current);
 		}
 	}
 
@@ -542,6 +541,13 @@
 	}
 	DGA_InitHWSurfaces(this, current, surfaces_mem, surfaces_len);
 
+	/* Expose the back buffer as surface memory */
+	if ( current->flags & SDL_DOUBLEBUF ) {
+		this->screen = current;
+		DGA_FlipHWSurface(this, current);
+		this->screen = NULL;
+	}
+
 	/* Set the update rectangle function */
 	this->UpdateRects = DGA_DirectUpdate;