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SDL_x11yuv.c
439 lines (398 loc) · 13.5 KB
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/*
SDL - Simple DirectMedia Layer
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Copyright (C) 1997-2006 Sam Lantinga
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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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
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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Sam Lantinga
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slouken@libsdl.org
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*/
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#include "SDL_config.h"
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/* This is the XFree86 Xv extension implementation of YUV video overlays */
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#if SDL_VIDEO_DRIVER_X11_XV
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#include <X11/Xlib.h>
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#ifndef NO_SHARED_MEMORY
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#include <sys/ipc.h>
#include <sys/shm.h>
#include <X11/extensions/XShm.h>
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#endif
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#include "../Xext/extensions/Xvlib.h"
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#include "SDL_x11yuv_c.h"
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#include "../SDL_yuvfuncs.h"
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#define XFREE86_REFRESH_HACK
#ifdef XFREE86_REFRESH_HACK
#include "SDL_x11image_c.h"
#endif
/* Workaround when pitch != width */
#define PITCH_WORKAROUND
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/* Fix for the NVidia GeForce 2 - use the last available adaptor */
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#if 0 /* Apparently the NVidia drivers are fixed */
#define USE_LAST_ADAPTOR
#endif
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/* The functions used to manipulate software video overlays */
static struct private_yuvhwfuncs x11_yuvfuncs = {
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X11_LockYUVOverlay,
X11_UnlockYUVOverlay,
X11_DisplayYUVOverlay,
X11_FreeYUVOverlay
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};
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struct private_yuvhwdata
{
int port;
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#ifndef NO_SHARED_MEMORY
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int yuv_use_mitshm;
XShmSegmentInfo yuvshm;
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#endif
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SDL_NAME (XvImage) * image;
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};
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static int (*X_handler) (Display *, XErrorEvent *) = NULL;
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#ifndef NO_SHARED_MEMORY
/* Shared memory error handler routine */
static int shm_error;
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static int
shm_errhandler (Display * d, XErrorEvent * e)
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{
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if (e->error_code == BadAccess) {
shm_error = True;
return (0);
} else
return (X_handler (d, e));
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}
#endif /* !NO_SHARED_MEMORY */
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static int xv_error;
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static int
xv_errhandler (Display * d, XErrorEvent * e)
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{
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if (e->error_code == BadMatch) {
xv_error = True;
return (0);
} else
return (X_handler (d, e));
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}
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SDL_Overlay *
X11_CreateYUVOverlay (_THIS, int width, int height, Uint32 format,
SDL_Surface * display)
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{
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SDL_Overlay *overlay;
struct private_yuvhwdata *hwdata;
int xv_port;
unsigned int i, j, k;
unsigned int adaptors;
SDL_NAME (XvAdaptorInfo) * ainfo;
int bpp;
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#ifndef NO_SHARED_MEMORY
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XShmSegmentInfo *yuvshm;
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#endif
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/* Look for the XVideo extension with a valid port for this format */
xv_port = -1;
if ((Success ==
SDL_NAME (XvQueryExtension) (GFX_Display, &j, &j, &j, &j, &j))
&& (Success ==
SDL_NAME (XvQueryAdaptors) (GFX_Display,
RootWindow (GFX_Display, SDL_Screen),
&adaptors, &ainfo))) {
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#ifdef USE_LAST_ADAPTOR
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for (i = 0; i < adaptors; ++i)
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#else
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for (i = 0; (i < adaptors) && (xv_port == -1); ++i)
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#endif /* USE_LAST_ADAPTOR */
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{
/* Check to see if the visual can be used */
if (BUGGY_XFREE86 (<=, 4001)) {
int visual_ok = 0;
for (j = 0; j < ainfo[i].num_formats; ++j) {
if (ainfo[i].formats[j].visual_id == SDL_Visual->visualid) {
visual_ok = 1;
break;
}
}
if (!visual_ok) {
continue;
}
}
if ((ainfo[i].type & XvInputMask) &&
(ainfo[i].type & XvImageMask)) {
int num_formats;
SDL_NAME (XvImageFormatValues) * formats;
formats = SDL_NAME (XvListImageFormats) (GFX_Display,
ainfo[i].
base_id,
&num_formats);
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#ifdef USE_LAST_ADAPTOR
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for (j = 0; j < num_formats; ++j)
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#else
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for (j = 0; (j < num_formats) && (xv_port == -1); ++j)
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#endif /* USE_LAST_ADAPTOR */
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{
if ((Uint32) formats[j].id == format) {
for (k = 0; k < ainfo[i].num_ports; ++k) {
if (Success == SDL_NAME (XvGrabPort)
(GFX_Display,
ainfo[i].base_id + k, CurrentTime)) {
xv_port = ainfo[i].base_id + k;
break;
}
}
}
}
if (formats) {
XFree (formats);
}
}
}
SDL_NAME (XvFreeAdaptorInfo) (ainfo);
}
/* Precalculate the bpp for the pitch workaround below */
switch (format) {
/* Add any other cases we need to support... */
case SDL_YUY2_OVERLAY:
case SDL_UYVY_OVERLAY:
case SDL_YVYU_OVERLAY:
bpp = 2;
break;
default:
bpp = 1;
break;
}
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#if 0
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/*
* !!! FIXME:
* "Here are some diffs for X11 and yuv. Note that the last part 2nd
* diff should probably be a new call to XvQueryAdaptorFree with ainfo
* and the number of adaptors, instead of the loop through like I did."
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*
* ACHTUNG: This is broken! It looks like XvFreeAdaptorInfo does this
* for you, so we end up with a double-free. I need to look at this
* more closely... --ryan.
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*/
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for (i = 0; i < adaptors; ++i) {
if (ainfo[i].name != NULL)
Xfree (ainfo[i].name);
if (ainfo[i].formats != NULL)
Xfree (ainfo[i].formats);
}
Xfree (ainfo);
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#endif
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if (xv_port == -1) {
SDL_SetError ("No available video ports for requested format");
return (NULL);
}
/* Enable auto-painting of the overlay colorkey */
{
static const char *attr[] =
{ "XV_AUTOPAINT_COLORKEY", "XV_AUTOPAINT_COLOURKEY" };
unsigned int i;
SDL_NAME (XvSelectPortNotify) (GFX_Display, xv_port, True);
X_handler = XSetErrorHandler (xv_errhandler);
for (i = 0; i < sizeof (attr) / (sizeof attr[0]); ++i) {
Atom a;
xv_error = False;
a = XInternAtom (GFX_Display, attr[i], True);
if (a != None) {
SDL_NAME (XvSetPortAttribute) (GFX_Display, xv_port, a, 1);
XSync (GFX_Display, True);
if (!xv_error) {
break;
}
}
}
XSetErrorHandler (X_handler);
SDL_NAME (XvSelectPortNotify) (GFX_Display, xv_port, False);
}
/* Create the overlay structure */
overlay = (SDL_Overlay *) SDL_malloc (sizeof *overlay);
if (overlay == NULL) {
SDL_NAME (XvUngrabPort) (GFX_Display, xv_port, CurrentTime);
SDL_OutOfMemory ();
return (NULL);
}
SDL_memset (overlay, 0, (sizeof *overlay));
/* Fill in the basic members */
overlay->format = format;
overlay->w = width;
overlay->h = height;
/* Set up the YUV surface function structure */
overlay->hwfuncs = &x11_yuvfuncs;
overlay->hw_overlay = 1;
/* Create the pixel data and lookup tables */
hwdata = (struct private_yuvhwdata *) SDL_malloc (sizeof *hwdata);
overlay->hwdata = hwdata;
if (hwdata == NULL) {
SDL_NAME (XvUngrabPort) (GFX_Display, xv_port, CurrentTime);
SDL_OutOfMemory ();
SDL_FreeYUVOverlay (overlay);
return (NULL);
}
hwdata->port = xv_port;
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#ifndef NO_SHARED_MEMORY
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yuvshm = &hwdata->yuvshm;
SDL_memset (yuvshm, 0, sizeof (*yuvshm));
hwdata->image = SDL_NAME (XvShmCreateImage) (GFX_Display, xv_port, format,
0, width, height, yuvshm);
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#ifdef PITCH_WORKAROUND
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if (hwdata->image != NULL && hwdata->image->pitches[0] != (width * bpp)) {
/* Ajust overlay width according to pitch */
XFree (hwdata->image);
width = hwdata->image->pitches[0] / bpp;
hwdata->image =
SDL_NAME (XvShmCreateImage) (GFX_Display, xv_port, format, 0,
width, height, yuvshm);
}
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#endif /* PITCH_WORKAROUND */
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hwdata->yuv_use_mitshm = (hwdata->image != NULL);
if (hwdata->yuv_use_mitshm) {
yuvshm->shmid = shmget (IPC_PRIVATE, hwdata->image->data_size,
IPC_CREAT | 0777);
if (yuvshm->shmid >= 0) {
yuvshm->shmaddr = (char *) shmat (yuvshm->shmid, 0, 0);
yuvshm->readOnly = False;
if (yuvshm->shmaddr != (char *) -1) {
shm_error = False;
X_handler = XSetErrorHandler (shm_errhandler);
XShmAttach (GFX_Display, yuvshm);
XSync (GFX_Display, True);
XSetErrorHandler (X_handler);
if (shm_error)
shmdt (yuvshm->shmaddr);
} else {
shm_error = True;
}
shmctl (yuvshm->shmid, IPC_RMID, NULL);
} else {
shm_error = True;
}
if (shm_error) {
XFree (hwdata->image);
hwdata->yuv_use_mitshm = 0;
} else {
hwdata->image->data = yuvshm->shmaddr;
}
}
if (!hwdata->yuv_use_mitshm)
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#endif /* NO_SHARED_MEMORY */
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{
hwdata->image =
SDL_NAME (XvCreateImage) (GFX_Display, xv_port, format, 0,
width, height);
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#ifdef PITCH_WORKAROUND
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if (hwdata->image != NULL
&& hwdata->image->pitches[0] != (width * bpp)) {
/* Ajust overlay width according to pitch */
XFree (hwdata->image);
width = hwdata->image->pitches[0] / bpp;
hwdata->image =
SDL_NAME (XvCreateImage) (GFX_Display, xv_port, format, 0,
width, height);
}
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#endif /* PITCH_WORKAROUND */
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if (hwdata->image == NULL) {
SDL_SetError ("Couldn't create XVideo image");
SDL_FreeYUVOverlay (overlay);
return (NULL);
}
hwdata->image->data = SDL_malloc (hwdata->image->data_size);
if (hwdata->image->data == NULL) {
SDL_OutOfMemory ();
SDL_FreeYUVOverlay (overlay);
return (NULL);
}
}
/* Find the pitch and offset values for the overlay */
overlay->planes = hwdata->image->num_planes;
overlay->pitches =
(Uint16 *) SDL_malloc (overlay->planes * sizeof (Uint16));
overlay->pixels =
(Uint8 **) SDL_malloc (overlay->planes * sizeof (Uint8 *));
if (!overlay->pitches || !overlay->pixels) {
SDL_OutOfMemory ();
SDL_FreeYUVOverlay (overlay);
return (NULL);
}
for (i = 0; i < overlay->planes; ++i) {
overlay->pitches[i] = hwdata->image->pitches[i];
overlay->pixels[i] = (Uint8 *) hwdata->image->data +
hwdata->image->offsets[i];
}
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#ifdef XFREE86_REFRESH_HACK
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/* Work around an XFree86 X server bug (?)
We can't perform normal updates in windows that have video
being output to them. See SDL_x11image.c for more details.
*/
X11_DisableAutoRefresh (this);
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#endif
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/* We're all done.. */
return (overlay);
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}
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int
X11_LockYUVOverlay (_THIS, SDL_Overlay * overlay)
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{
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return (0);
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}
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void
X11_UnlockYUVOverlay (_THIS, SDL_Overlay * overlay)
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{
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return;
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}
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int
X11_DisplayYUVOverlay (_THIS, SDL_Overlay * overlay, SDL_Rect * src,
SDL_Rect * dst)
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{
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struct private_yuvhwdata *hwdata;
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hwdata = overlay->hwdata;
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#ifndef NO_SHARED_MEMORY
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if (hwdata->yuv_use_mitshm) {
SDL_NAME (XvShmPutImage) (GFX_Display, hwdata->port, SDL_Window,
SDL_GC, hwdata->image, src->x, src->y,
src->w, src->h, dst->x, dst->y, dst->w,
dst->h, False);
} else
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#endif
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{
SDL_NAME (XvPutImage) (GFX_Display, hwdata->port, SDL_Window,
SDL_GC, hwdata->image, src->x, src->y,
src->w, src->h, dst->x, dst->y, dst->w,
dst->h);
}
XSync (GFX_Display, False);
return (0);
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}
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void
X11_FreeYUVOverlay (_THIS, SDL_Overlay * overlay)
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{
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struct private_yuvhwdata *hwdata;
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hwdata = overlay->hwdata;
if (hwdata) {
SDL_NAME (XvUngrabPort) (GFX_Display, hwdata->port, CurrentTime);
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#ifndef NO_SHARED_MEMORY
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if (hwdata->yuv_use_mitshm) {
XShmDetach (GFX_Display, &hwdata->yuvshm);
shmdt (hwdata->yuvshm.shmaddr);
}
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#endif
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if (hwdata->image) {
XFree (hwdata->image);
}
SDL_free (hwdata);
}
if (overlay->pitches) {
SDL_free (overlay->pitches);
overlay->pitches = NULL;
}
if (overlay->pixels) {
SDL_free (overlay->pixels);
overlay->pixels = NULL;
}
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#ifdef XFREE86_REFRESH_HACK
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X11_EnableAutoRefresh (this);
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#endif
}
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#endif /* SDL_VIDEO_DRIVER_X11_XV */
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/* vi: set ts=4 sw=4 expandtab: */