--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/video/x11/SDL_x11yuv.c	Thu Apr 26 16:45:43 2001 +0000
@@ -0,0 +1,280 @@
+/*
+    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 XFree86 Xv extension implementation of YUV video overlays */
+
+#ifdef XFREE86_XV
+
+#include <stdlib.h>
+#include <string.h>
+#include <X11/Xlib.h>
+#include <sys/ipc.h>
+#include <sys/shm.h>
+#include <X11/extensions/XShm.h>
+#include <X11/extensions/Xvlib.h>
+
+#include "SDL_error.h"
+#include "SDL_video.h"
+#include "SDL_x11yuv_c.h"
+#include "SDL_yuvfuncs.h"
+
+#define XFREE86_REFRESH_HACK
+#ifdef XFREE86_REFRESH_HACK
+#include "SDL_x11image_c.h"
+#endif
+
+/* Workaround when pitch != width */
+#define PITCH_WORKAROUND
+
+/* The functions used to manipulate software video overlays */
+static struct private_yuvhwfuncs x11_yuvfuncs = {
+	X11_LockYUVOverlay,
+	X11_UnlockYUVOverlay,
+	X11_DisplayYUVOverlay,
+	X11_FreeYUVOverlay
+};
+
+struct private_yuvhwdata {
+	int port;
+	XShmSegmentInfo yuvshm;
+	XvImage *image;
+};
+
+
+SDL_Overlay *X11_CreateYUVOverlay(_THIS, int width, int height, Uint32 format, SDL_Surface *display)
+{
+	SDL_Overlay *overlay;
+	struct private_yuvhwdata *hwdata;
+	int xv_port;
+	int i, j, k;
+	int adaptors;
+	XvAdaptorInfo *ainfo;
+	XShmSegmentInfo *yuvshm;
+
+	/* Look for the XVideo extension with a valid port for this format */
+	xv_port = -1;
+	if ( (Success == XvQueryExtension(GFX_Display, &j, &j, &j, &j, &j)) &&
+	     (Success == XvQueryAdaptors(GFX_Display,
+	                                 RootWindow(GFX_Display, SDL_Screen),
+	                                 &adaptors, &ainfo)) ) {
+		for ( i=0; (i < adaptors) && (xv_port == -1); ++i ) {
+			/* 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;
+				XvImageFormatValues *formats;
+				formats = XvListImageFormats(GFX_Display,
+				              ainfo[i].base_id, &num_formats);
+				for ( j=0; (j < num_formats) && (xv_port == -1); ++j ) {
+					if ( (Uint32)formats[j].id == format ) {
+						for ( k=0; k < ainfo[i].num_ports; ++k ) {
+							if ( Success == XvGrabPort(GFX_Display, ainfo[i].base_id+k, CurrentTime) ) {
+								xv_port = ainfo[i].base_id+k;
+								break;
+							}
+						}
+					}
+				}
+			}
+		}
+	}
+	if ( xv_port == -1 ) {
+		SDL_SetError("No available video ports for requested format");
+		return(NULL);
+	}
+
+	/* Create the overlay structure */
+	overlay = (SDL_Overlay *)malloc(sizeof *overlay);
+	if ( overlay == NULL ) {
+		XvUngrabPort(GFX_Display, xv_port, CurrentTime);
+		SDL_OutOfMemory();
+		return(NULL);
+	}
+	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 *)malloc(sizeof *hwdata);
+	overlay->hwdata = hwdata;
+	if ( hwdata == NULL ) {
+		XvUngrabPort(GFX_Display, xv_port, CurrentTime);
+		SDL_OutOfMemory();
+		SDL_FreeYUVOverlay(overlay);
+		return(NULL);
+	}
+	yuvshm = &hwdata->yuvshm;
+	memset(yuvshm, 0, sizeof(*yuvshm));
+	hwdata->port = xv_port;
+	hwdata->image = XvShmCreateImage(GFX_Display, xv_port, format,
+	                                 0, width, height, yuvshm);
+
+#ifdef PITCH_WORKAROUND
+	if ( hwdata->image != NULL && hwdata->image->pitches[0] != width )
+	{
+	  /* Ajust overlay width according to pitch */ 
+	  switch (format) {
+	    case SDL_YV12_OVERLAY:
+	    case SDL_IYUV_OVERLAY:
+	        width = hwdata->image->pitches[0];
+		break;
+	    case SDL_YUY2_OVERLAY:
+	    case SDL_UYVY_OVERLAY:
+	    case SDL_YVYU_OVERLAY:
+	        width = hwdata->image->pitches[0] / 2;
+		break;
+	    default:
+		/* We should never get here (caught above) */
+		return(NULL);
+	  }
+	  
+	  XFree(hwdata->image);
+	  hwdata->image = XvShmCreateImage(GFX_Display, xv_port, format,
+					   0, width, height, yuvshm);
+	}
+#endif
+
+	if ( hwdata->image == NULL ) {
+		SDL_OutOfMemory();
+		SDL_FreeYUVOverlay(overlay);
+		return(NULL);
+	}
+	yuvshm->shmid = shmget(IPC_PRIVATE, hwdata->image->data_size,
+	                       IPC_CREAT | 0777);
+	if ( yuvshm->shmid < 0 ) {
+		SDL_SetError("Unable to get %d bytes shared memory",
+		             hwdata->image->data_size);
+		SDL_FreeYUVOverlay(overlay);
+		return(NULL);
+	}
+	yuvshm->shmaddr  = (char *) shmat(yuvshm->shmid, 0, 0);
+	yuvshm->readOnly = False;
+	hwdata->image->data = yuvshm->shmaddr;
+
+	XShmAttach(GFX_Display, yuvshm);
+	XSync(GFX_Display, False);
+	shmctl(yuvshm->shmid, IPC_RMID, 0);
+
+	/* Find the pitch and offset values for the overlay */
+	overlay->planes = hwdata->image->num_planes;
+	overlay->pitches = (Uint16 *)malloc(overlay->planes * sizeof(Uint16));
+	overlay->pixels = (Uint8 **)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];
+	}
+
+#ifdef XFREE86_REFRESH_HACK
+	/* 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);
+#endif
+
+	/* We're all done.. */
+	return(overlay);
+}
+
+int X11_LockYUVOverlay(_THIS, SDL_Overlay *overlay)
+{
+	return(0);
+}
+
+void X11_UnlockYUVOverlay(_THIS, SDL_Overlay *overlay)
+{
+	return;
+}
+
+int X11_DisplayYUVOverlay(_THIS, SDL_Overlay *overlay, SDL_Rect *dstrect)
+{
+	struct private_yuvhwdata *hwdata;
+
+	hwdata = overlay->hwdata;
+	XvShmPutImage(GFX_Display, hwdata->port, SDL_Window, SDL_GC,
+	              hwdata->image, 0, 0, overlay->w, overlay->h,
+	              dstrect->x, dstrect->y, dstrect->w, dstrect->h, False);
+	XSync(GFX_Display, False);
+	return(0);
+}
+
+void X11_FreeYUVOverlay(_THIS, SDL_Overlay *overlay)
+{
+	struct private_yuvhwdata *hwdata;
+
+	hwdata = overlay->hwdata;
+	if ( hwdata ) {
+		XvUngrabPort(GFX_Display, hwdata->port, CurrentTime);
+		if ( hwdata->yuvshm.shmaddr ) {
+			XShmDetach(GFX_Display, &hwdata->yuvshm);
+			shmdt(hwdata->yuvshm.shmaddr);
+		}
+		if ( hwdata->image ) {
+			XFree(hwdata->image);
+		}
+		free(hwdata);
+	}
+	if ( overlay->pitches ) {
+		free(overlay->pitches);
+		overlay->pitches = NULL;
+	}
+	if ( overlay->pixels ) {
+		free(overlay->pixels);
+		overlay->pixels = NULL;
+	}
+#ifdef XFREE86_REFRESH_HACK
+	X11_EnableAutoRefresh(this);
+#endif
+}
+
+#endif /* XFREE86_XV */