--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/video/SDL_yuv.c	Thu Apr 26 16:45:43 2001 +0000
@@ -0,0 +1,93 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997, 1998, 1999, 2000, 2001  Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public
+    License along with this library; if not, write to the Free
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+    Sam Lantinga
+    slouken@devolution.com
+*/
+
+#ifdef SAVE_RCSID
+static char rcsid =
+ "@(#) $Id$";
+#endif
+
+/* This is the implementation of the YUV video surface support */
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "SDL_getenv.h"
+#include "SDL_video.h"
+#include "SDL_sysvideo.h"
+#include "SDL_yuvfuncs.h"
+#include "SDL_yuv_sw_c.h"
+
+
+SDL_Overlay *SDL_CreateYUVOverlay(int w, int h, Uint32 format,
+                                  SDL_Surface *display)
+{
+	SDL_VideoDevice *video = current_video;
+	SDL_VideoDevice *this  = current_video;
+	const char *yuv_hwaccel;
+	SDL_Overlay *overlay;
+
+	overlay = NULL;
+
+	/* Display directly on video surface, if possible */
+#if 0
+	if ( (display == SDL_PublicSurface) &&
+	     ((SDL_VideoSurface->format->BytesPerPixel == 2) ||
+	      (SDL_VideoSurface->format->BytesPerPixel == 4)) ) {
+		display = SDL_VideoSurface;
+	}
+#endif
+        yuv_hwaccel = getenv("SDL_VIDEO_YUV_HWACCEL");
+	if ( ((display == SDL_VideoSurface) && video->CreateYUVOverlay) &&
+	     (!yuv_hwaccel || (atoi(yuv_hwaccel) > 0)) ) {
+		overlay = video->CreateYUVOverlay(this, w, h, format, display);
+	}
+	/* If hardware YUV overlay failed ... */
+	if ( overlay == NULL ) {
+		overlay = SDL_CreateYUV_SW(this, w, h, format, display);
+	}
+	return overlay;
+}
+
+int SDL_LockYUVOverlay(SDL_Overlay *overlay)
+{
+	return overlay->hwfuncs->Lock(current_video, overlay);
+}
+
+void SDL_UnlockYUVOverlay(SDL_Overlay *overlay)
+{
+	overlay->hwfuncs->Unlock(current_video, overlay);
+}
+
+int SDL_DisplayYUVOverlay(SDL_Overlay *overlay, SDL_Rect *dstrect)
+{
+	return overlay->hwfuncs->Display(current_video, overlay, dstrect);
+}
+
+void SDL_FreeYUVOverlay(SDL_Overlay *overlay)
+{
+	if ( overlay ) {
+		if ( overlay->hwfuncs ) {
+			overlay->hwfuncs->FreeHW(current_video, overlay);
+		}
+		free(overlay);
+	}
+}