make xephyr talk DRI protocol with hostX

* configure.ac,include/dix-config.h.in: define the XEPHYR_DRI macro.
	  define it when --enable-xephyr and --enable-dri are both turned on.
	* hw/kdrive/ephyr/XF86dri.c: copy this from mesa source to enable
	  Xephyr to talk DRI protocol the host X. In mesa, this is used by libGL.so to
	  talk DRI protocol with the server.
	* hw/kdrive/ephyr/ephyr.c: finally initialise the DRI extension
	  in the ephyrInitScreen() function.
	* hw/kdrive/ephyr/ephyrdri.c,ephyrdriext.c: safeguard the compilation
	  using the XEPHYR_DRI macro.
This commit is contained in:
Dodji Seketeli 2007-08-15 19:40:10 +02:00 committed by Dodji Seketeli
parent e4239a4807
commit a38ad562a6
7 changed files with 666 additions and 8 deletions

View File

@ -1842,6 +1842,13 @@ if test "$KDRIVE" = yes; then
if test "x$XEPHYR" = xauto; then
XEPHYR=$xephyr
fi
XEPHYR_DRI=no
if test x$XEPHYR = xyes -a x$DRI = xyes; then
XEPHYR_DRI=yes
fi
if test x$XEPHYR_DRI = xyes ; then
AC_DEFINE(XEPHYR_DRI,1,[enable DRI extension in xephyr])
fi
# Xephyr needs nanosleep() which is in librt on Solaris
AC_CHECK_FUNC([nanosleep], [],

View File

@ -22,7 +22,8 @@ libxephyr_a_SOURCES = \
ephyr.c \
ephyr_draw.c \
ephyrvideo.c \
ephyrdriext.c \
XF86dri.c \
ephyrdriext.c \
ephyrdri.c \
ephyrdri.h \
os.c \
@ -41,8 +42,9 @@ Xephyr_LDADD = \
libxephyr-hostxv.a \
../../../exa/libexa.la \
@KDRIVE_LIBS@ \
@XEPHYR_LIBS@ \
@LIBDRM_LIBS@
@XEPHYR_LIBS@ \
@LIBDRM_LIBS@ \
-lGL
Xephyr_DEPENDENCIES = \
libxephyr.a \

635
hw/kdrive/ephyr/XF86dri.c Normal file
View File

@ -0,0 +1,635 @@
/* $XFree86: xc/lib/GL/dri/XF86dri.c,v 1.13 2002/10/30 12:51:25 alanh Exp $ */
/**************************************************************************
Copyright 1998-1999 Precision Insight, Inc., Cedar Park, Texas.
Copyright 2000 VA Linux Systems, Inc.
All Rights Reserved.
Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and associated documentation files (the
"Software"), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sub license, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:
The above copyright notice and this permission notice (including the
next paragraph) shall be included in all copies or substantial portions
of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
IN NO EVENT SHALL PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR
ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
**************************************************************************/
/*
* Authors:
* Kevin E. Martin <martin@valinux.com>
* Jens Owen <jens@tungstengraphics.com>
* Rickard E. (Rik) Faith <faith@valinux.com>
*
*/
/*
* This file has been copied from the mesa source tree and a little bit
* modified by:
*
* Dodji Seketeli <dodji@openedhand.com>
*/
#ifdef HAVE_CONFIG_H
#include <kdrive-config.h>
#endif
#ifdef XEPHYR_DRI
/* THIS IS NOT AN X CONSORTIUM STANDARD */
#define NEED_REPLIES
#include <X11/Xlibint.h>
#include <X11/extensions/Xext.h>
#include <X11/extensions/extutil.h>
#include <GL/glx.h>
#include <X11/dri/xf86dri.h>
#include <X11/dri/xf86dristr.h>
static XExtensionInfo _xf86dri_info_data;
static XExtensionInfo *xf86dri_info = &_xf86dri_info_data;
static char xf86dri_extension_name[] = XF86DRINAME;
#define XF86DRICheckExtension(dpy,i,val) \
XextCheckExtension (dpy, i, xf86dri_extension_name, val)
/*****************************************************************************
* *
* private utility routines *
* *
*****************************************************************************/
static int close_display(Display *dpy, XExtCodes *extCodes);
static /* const */ XExtensionHooks xf86dri_extension_hooks = {
NULL, /* create_gc */
NULL, /* copy_gc */
NULL, /* flush_gc */
NULL, /* free_gc */
NULL, /* create_font */
NULL, /* free_font */
close_display, /* close_display */
NULL, /* wire_to_event */
NULL, /* event_to_wire */
NULL, /* error */
NULL, /* error_string */
};
static XEXT_GENERATE_FIND_DISPLAY (find_display, xf86dri_info,
xf86dri_extension_name,
&xf86dri_extension_hooks,
0, NULL)
static XEXT_GENERATE_CLOSE_DISPLAY (close_display, xf86dri_info)
/*****************************************************************************
* *
* public XFree86-DRI Extension routines *
* *
*****************************************************************************/
#if 0
#include <stdio.h>
#define TRACE(msg) fprintf(stderr,"XF86DRI%s\n", msg);
#else
#define TRACE(msg)
#endif
Bool XF86DRIQueryExtension (dpy, event_basep, error_basep)
Display *dpy;
int *event_basep, *error_basep;
{
XExtDisplayInfo *info = find_display (dpy);
TRACE("QueryExtension...");
if (XextHasExtension(info)) {
*event_basep = info->codes->first_event;
*error_basep = info->codes->first_error;
TRACE("QueryExtension... return True");
return True;
} else {
TRACE("QueryExtension... return False");
return False;
}
}
Bool XF86DRIQueryVersion(dpy, majorVersion, minorVersion, patchVersion)
Display* dpy;
int* majorVersion;
int* minorVersion;
int* patchVersion;
{
XExtDisplayInfo *info = find_display (dpy);
xXF86DRIQueryVersionReply rep;
xXF86DRIQueryVersionReq *req;
TRACE("QueryVersion...");
XF86DRICheckExtension (dpy, info, False);
LockDisplay(dpy);
GetReq(XF86DRIQueryVersion, req);
req->reqType = info->codes->major_opcode;
req->driReqType = X_XF86DRIQueryVersion;
if (!_XReply(dpy, (xReply *)&rep, 0, xFalse)) {
UnlockDisplay(dpy);
SyncHandle();
TRACE("QueryVersion... return False");
return False;
}
*majorVersion = rep.majorVersion;
*minorVersion = rep.minorVersion;
*patchVersion = rep.patchVersion;
UnlockDisplay(dpy);
SyncHandle();
TRACE("QueryVersion... return True");
return True;
}
Bool XF86DRIQueryDirectRenderingCapable(dpy, screen, isCapable)
Display* dpy;
int screen;
Bool* isCapable;
{
XExtDisplayInfo *info = find_display (dpy);
xXF86DRIQueryDirectRenderingCapableReply rep;
xXF86DRIQueryDirectRenderingCapableReq *req;
TRACE("QueryDirectRenderingCapable...");
XF86DRICheckExtension (dpy, info, False);
LockDisplay(dpy);
GetReq(XF86DRIQueryDirectRenderingCapable, req);
req->reqType = info->codes->major_opcode;
req->driReqType = X_XF86DRIQueryDirectRenderingCapable;
req->screen = screen;
if (!_XReply(dpy, (xReply *)&rep, 0, xFalse)) {
UnlockDisplay(dpy);
SyncHandle();
TRACE("QueryDirectRenderingCapable... return False");
return False;
}
*isCapable = rep.isCapable;
UnlockDisplay(dpy);
SyncHandle();
TRACE("QueryDirectRenderingCapable... return True");
return True;
}
Bool XF86DRIOpenConnection(dpy, screen, hSAREA, busIdString)
Display* dpy;
int screen;
drm_handle_t * hSAREA;
char **busIdString;
{
XExtDisplayInfo *info = find_display (dpy);
xXF86DRIOpenConnectionReply rep;
xXF86DRIOpenConnectionReq *req;
TRACE("OpenConnection...");
XF86DRICheckExtension (dpy, info, False);
LockDisplay(dpy);
GetReq(XF86DRIOpenConnection, req);
req->reqType = info->codes->major_opcode;
req->driReqType = X_XF86DRIOpenConnection;
req->screen = screen;
if (!_XReply(dpy, (xReply *)&rep, 0, xFalse)) {
UnlockDisplay(dpy);
SyncHandle();
TRACE("OpenConnection... return False");
return False;
}
*hSAREA = rep.hSAREALow;
if (sizeof(drm_handle_t) == 8) {
int shift = 32; /* var to prevent warning on next line */
*hSAREA |= ((drm_handle_t) rep.hSAREAHigh) << shift;
}
if (rep.length) {
if (!(*busIdString = (char *)Xcalloc(rep.busIdStringLength + 1, 1))) {
_XEatData(dpy, ((rep.busIdStringLength+3) & ~3));
UnlockDisplay(dpy);
SyncHandle();
TRACE("OpenConnection... return False");
return False;
}
_XReadPad(dpy, *busIdString, rep.busIdStringLength);
} else {
*busIdString = NULL;
}
UnlockDisplay(dpy);
SyncHandle();
TRACE("OpenConnection... return True");
return True;
}
Bool XF86DRIAuthConnection(dpy, screen, magic)
Display* dpy;
int screen;
drm_magic_t magic;
{
XExtDisplayInfo *info = find_display (dpy);
xXF86DRIAuthConnectionReq *req;
xXF86DRIAuthConnectionReply rep;
TRACE("AuthConnection...");
XF86DRICheckExtension (dpy, info, False);
LockDisplay(dpy);
GetReq(XF86DRIAuthConnection, req);
req->reqType = info->codes->major_opcode;
req->driReqType = X_XF86DRIAuthConnection;
req->screen = screen;
req->magic = magic;
rep.authenticated = 0;
if (!_XReply(dpy, (xReply *)&rep, 0, xFalse) || !rep.authenticated) {
UnlockDisplay(dpy);
SyncHandle();
TRACE("AuthConnection... return False");
return False;
}
UnlockDisplay(dpy);
SyncHandle();
TRACE("AuthConnection... return True");
return True;
}
Bool XF86DRICloseConnection(dpy, screen)
Display* dpy;
int screen;
{
XExtDisplayInfo *info = find_display (dpy);
xXF86DRICloseConnectionReq *req;
TRACE("CloseConnection...");
XF86DRICheckExtension (dpy, info, False);
LockDisplay(dpy);
GetReq(XF86DRICloseConnection, req);
req->reqType = info->codes->major_opcode;
req->driReqType = X_XF86DRICloseConnection;
req->screen = screen;
UnlockDisplay(dpy);
SyncHandle();
TRACE("CloseConnection... return True");
return True;
}
Bool XF86DRIGetClientDriverName(dpy, screen, ddxDriverMajorVersion,
ddxDriverMinorVersion, ddxDriverPatchVersion, clientDriverName)
Display* dpy;
int screen;
int* ddxDriverMajorVersion;
int* ddxDriverMinorVersion;
int* ddxDriverPatchVersion;
char** clientDriverName;
{
XExtDisplayInfo *info = find_display (dpy);
xXF86DRIGetClientDriverNameReply rep;
xXF86DRIGetClientDriverNameReq *req;
TRACE("GetClientDriverName...");
XF86DRICheckExtension (dpy, info, False);
LockDisplay(dpy);
GetReq(XF86DRIGetClientDriverName, req);
req->reqType = info->codes->major_opcode;
req->driReqType = X_XF86DRIGetClientDriverName;
req->screen = screen;
if (!_XReply(dpy, (xReply *)&rep, 0, xFalse)) {
UnlockDisplay(dpy);
SyncHandle();
TRACE("GetClientDriverName... return False");
return False;
}
*ddxDriverMajorVersion = rep.ddxDriverMajorVersion;
*ddxDriverMinorVersion = rep.ddxDriverMinorVersion;
*ddxDriverPatchVersion = rep.ddxDriverPatchVersion;
if (rep.length) {
if (!(*clientDriverName = (char *)Xcalloc(rep.clientDriverNameLength + 1, 1))) {
_XEatData(dpy, ((rep.clientDriverNameLength+3) & ~3));
UnlockDisplay(dpy);
SyncHandle();
TRACE("GetClientDriverName... return False");
return False;
}
_XReadPad(dpy, *clientDriverName, rep.clientDriverNameLength);
} else {
*clientDriverName = NULL;
}
UnlockDisplay(dpy);
SyncHandle();
TRACE("GetClientDriverName... return True");
return True;
}
Bool XF86DRICreateContextWithConfig(dpy, screen, configID, context,
hHWContext)
Display* dpy;
int screen;
int configID;
XID* context;
drm_context_t * hHWContext;
{
XExtDisplayInfo *info = find_display (dpy);
xXF86DRICreateContextReply rep;
xXF86DRICreateContextReq *req;
TRACE("CreateContext...");
XF86DRICheckExtension (dpy, info, False);
LockDisplay(dpy);
GetReq(XF86DRICreateContext, req);
req->reqType = info->codes->major_opcode;
req->driReqType = X_XF86DRICreateContext;
req->visual = configID;
req->screen = screen;
*context = XAllocID(dpy);
req->context = *context;
if (!_XReply(dpy, (xReply *)&rep, 0, xFalse)) {
UnlockDisplay(dpy);
SyncHandle();
TRACE("CreateContext... return False");
return False;
}
*hHWContext = rep.hHWContext;
UnlockDisplay(dpy);
SyncHandle();
TRACE("CreateContext... return True");
return True;
}
Bool XF86DRICreateContext(dpy, screen, visual, context, hHWContext)
Display* dpy;
int screen;
Visual* visual;
XID* context;
drm_context_t * hHWContext;
{
return XF86DRICreateContextWithConfig( dpy, screen, visual->visualid,
context, hHWContext );
}
GLboolean XF86DRIDestroyContext( __DRInativeDisplay * ndpy, int screen,
__DRIid context )
{
Display * const dpy = (Display *) ndpy;
XExtDisplayInfo *info = find_display (dpy);
xXF86DRIDestroyContextReq *req;
TRACE("DestroyContext...");
XF86DRICheckExtension (dpy, info, False);
LockDisplay(dpy);
GetReq(XF86DRIDestroyContext, req);
req->reqType = info->codes->major_opcode;
req->driReqType = X_XF86DRIDestroyContext;
req->screen = screen;
req->context = context;
UnlockDisplay(dpy);
SyncHandle();
TRACE("DestroyContext... return True");
return True;
}
GLboolean XF86DRICreateDrawable( __DRInativeDisplay * ndpy, int screen,
__DRIid drawable, drm_drawable_t * hHWDrawable )
{
Display * const dpy = (Display *) ndpy;
XExtDisplayInfo *info = find_display (dpy);
xXF86DRICreateDrawableReply rep;
xXF86DRICreateDrawableReq *req;
TRACE("CreateDrawable...");
XF86DRICheckExtension (dpy, info, False);
LockDisplay(dpy);
GetReq(XF86DRICreateDrawable, req);
req->reqType = info->codes->major_opcode;
req->driReqType = X_XF86DRICreateDrawable;
req->screen = screen;
req->drawable = drawable;
if (!_XReply(dpy, (xReply *)&rep, 0, xFalse)) {
UnlockDisplay(dpy);
SyncHandle();
TRACE("CreateDrawable... return False");
return False;
}
*hHWDrawable = rep.hHWDrawable;
UnlockDisplay(dpy);
SyncHandle();
TRACE("CreateDrawable... return True");
return True;
}
GLboolean XF86DRIDestroyDrawable( __DRInativeDisplay * ndpy, int screen,
__DRIid drawable )
{
Display * const dpy = (Display *) ndpy;
XExtDisplayInfo *info = find_display (dpy);
xXF86DRIDestroyDrawableReq *req;
TRACE("DestroyDrawable...");
XF86DRICheckExtension (dpy, info, False);
LockDisplay(dpy);
GetReq(XF86DRIDestroyDrawable, req);
req->reqType = info->codes->major_opcode;
req->driReqType = X_XF86DRIDestroyDrawable;
req->screen = screen;
req->drawable = drawable;
UnlockDisplay(dpy);
SyncHandle();
TRACE("DestroyDrawable... return True");
return True;
}
Bool XF86DRIGetDrawableInfo(Display* dpy, int screen, Drawable drawable,
unsigned int* index, unsigned int* stamp,
int* X, int* Y, int* W, int* H,
int* numClipRects, drm_clip_rect_t ** pClipRects,
int* backX, int* backY,
int* numBackClipRects, drm_clip_rect_t ** pBackClipRects )
{
XExtDisplayInfo *info = find_display (dpy);
xXF86DRIGetDrawableInfoReply rep;
xXF86DRIGetDrawableInfoReq *req;
int total_rects;
TRACE("GetDrawableInfo...");
XF86DRICheckExtension (dpy, info, False);
LockDisplay(dpy);
GetReq(XF86DRIGetDrawableInfo, req);
req->reqType = info->codes->major_opcode;
req->driReqType = X_XF86DRIGetDrawableInfo;
req->screen = screen;
req->drawable = drawable;
if (!_XReply(dpy, (xReply *)&rep, 1, xFalse))
{
UnlockDisplay(dpy);
SyncHandle();
TRACE("GetDrawableInfo... return False");
return False;
}
*index = rep.drawableTableIndex;
*stamp = rep.drawableTableStamp;
*X = (int)rep.drawableX;
*Y = (int)rep.drawableY;
*W = (int)rep.drawableWidth;
*H = (int)rep.drawableHeight;
*numClipRects = rep.numClipRects;
total_rects = *numClipRects;
*backX = rep.backX;
*backY = rep.backY;
*numBackClipRects = rep.numBackClipRects;
total_rects += *numBackClipRects;
#if 0
/* Because of the fix in Xserver/GL/dri/xf86dri.c, this check breaks
* backwards compatibility (Because of the >> 2 shift) but the fix
* enables multi-threaded apps to work.
*/
if (rep.length != ((((SIZEOF(xXF86DRIGetDrawableInfoReply) -
SIZEOF(xGenericReply) +
total_rects * sizeof(drm_clip_rect_t)) + 3) & ~3) >> 2)) {
_XEatData(dpy, rep.length);
UnlockDisplay(dpy);
SyncHandle();
TRACE("GetDrawableInfo... return False");
return False;
}
#endif
if (*numClipRects) {
int len = sizeof(drm_clip_rect_t) * (*numClipRects);
*pClipRects = (drm_clip_rect_t *)Xcalloc(len, 1);
if (*pClipRects)
_XRead(dpy, (char*)*pClipRects, len);
} else {
*pClipRects = NULL;
}
if (*numBackClipRects) {
int len = sizeof(drm_clip_rect_t) * (*numBackClipRects);
*pBackClipRects = (drm_clip_rect_t *)Xcalloc(len, 1);
if (*pBackClipRects)
_XRead(dpy, (char*)*pBackClipRects, len);
} else {
*pBackClipRects = NULL;
}
UnlockDisplay(dpy);
SyncHandle();
TRACE("GetDrawableInfo... return True");
return True;
}
Bool XF86DRIGetDeviceInfo(dpy, screen, hFrameBuffer,
fbOrigin, fbSize, fbStride, devPrivateSize, pDevPrivate)
Display* dpy;
int screen;
drm_handle_t * hFrameBuffer;
int* fbOrigin;
int* fbSize;
int* fbStride;
int* devPrivateSize;
void** pDevPrivate;
{
XExtDisplayInfo *info = find_display (dpy);
xXF86DRIGetDeviceInfoReply rep;
xXF86DRIGetDeviceInfoReq *req;
TRACE("GetDeviceInfo...");
XF86DRICheckExtension (dpy, info, False);
LockDisplay(dpy);
GetReq(XF86DRIGetDeviceInfo, req);
req->reqType = info->codes->major_opcode;
req->driReqType = X_XF86DRIGetDeviceInfo;
req->screen = screen;
if (!_XReply(dpy, (xReply *)&rep, 0, xFalse)) {
UnlockDisplay(dpy);
SyncHandle();
TRACE("GetDeviceInfo... return False");
return False;
}
*hFrameBuffer = rep.hFrameBufferLow;
if (sizeof(drm_handle_t) == 8) {
int shift = 32; /* var to prevent warning on next line */
*hFrameBuffer |= ((drm_handle_t) rep.hFrameBufferHigh) << shift;
}
*fbOrigin = rep.framebufferOrigin;
*fbSize = rep.framebufferSize;
*fbStride = rep.framebufferStride;
*devPrivateSize = rep.devPrivateSize;
if (rep.length) {
if (!(*pDevPrivate = (void *)Xcalloc(rep.devPrivateSize, 1))) {
_XEatData(dpy, ((rep.devPrivateSize+3) & ~3));
UnlockDisplay(dpy);
SyncHandle();
TRACE("GetDeviceInfo... return False");
return False;
}
_XRead(dpy, (char*)*pDevPrivate, rep.devPrivateSize);
} else {
*pDevPrivate = NULL;
}
UnlockDisplay(dpy);
SyncHandle();
TRACE("GetDeviceInfo... return True");
return True;
}
Bool XF86DRIOpenFullScreen(dpy, screen, drawable)
Display* dpy;
int screen;
Drawable drawable;
{
/* This function and the underlying X protocol are deprecated.
*/
(void) dpy;
(void) screen;
(void) drawable;
return False;
}
Bool XF86DRICloseFullScreen(dpy, screen, drawable)
Display* dpy;
int screen;
Drawable drawable;
{
/* This function and the underlying X protocol are deprecated.
*/
(void) dpy;
(void) screen;
(void) drawable;
return True;
}
#endif /*EPHYR_DRI*/

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@ -606,6 +606,7 @@ ephyrInitScreen (ScreenPtr pScreen)
hostx_set_screen_number (screen, pScreen->myNum);
hostx_set_win_title (screen, "(ctrl+shift grabs mouse and keyboard)") ;
pScreen->CreateColormap = ephyrCreateColormap;
#ifdef XV
if (!ephyrInitVideo (pScreen)) {
EPHYR_LOG_ERROR ("failed to initialize xvideo\n") ;
@ -613,6 +614,10 @@ ephyrInitScreen (ScreenPtr pScreen)
EPHYR_LOG ("initialized xvideo okay\n") ;
}
#endif /*XV*/
#ifdef XEPHYR_DRI
ephyrDRIExtensionInit () ;
#endif
return TRUE;
}

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@ -25,10 +25,12 @@
* Authors:
* Dodji Seketeli <dodji@openedhand.com>
*/
#ifdef HAVE_XORG_CONFIG_H
#include <xorg-config.h>
#ifdef HAVE_CONFIG_H
#include <kdrive-config.h>
#endif
#ifdef XEPHYR_DRI
#include <X11/Xutil.h>
#include <X11/Xlibint.h>
/*#define _XF86DRI_SERVER_*/
@ -203,4 +205,5 @@ ephyrDRIGetDeviceInfo (int a_screen,
return FALSE ;
EPHYR_LOG ("leave\n") ;
}
#endif /*EPHYR_DRI*/

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@ -27,10 +27,13 @@
* Authors:
* Dodji Seketeli <dodji@openedhand.com>
*/
#ifdef HAVE_XORG_CONFIG_H
#include <xorg-config.h>
#ifdef HAVE_CONFIG_H
#include <kdrive-config.h>
#endif
#ifdef XEPHYR_DRI
#include <string.h>
#define NEED_REPLIES
@ -79,7 +82,7 @@ static unsigned char DRIReqCode = 0;
extern void XFree86DRIExtensionInit(void);
void
XFree86DRIExtensionInit(void)
ephyrDRIExtensionInit(void)
{
ExtensionEntry* extEntry;
EPHYR_LOG ("enter\n") ;
@ -689,3 +692,4 @@ SProcXF86DRIDispatch (
}
}
#endif /*XEPHYR_DRI*/

View File

@ -425,6 +425,8 @@
/* Support DRI extension */
#undef XF86DRI
#undef XEPHYR_DRI
/* Build DBE support */
#undef DBE