--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/video/cybergfx/SDL_cgxyuv.c	Thu May 10 20:13:29 2001 +0000
@@ -0,0 +1,191 @@
+/*
+    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"
+
+/* 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;
+	int adaptors;
+	XvAdaptorInfo *ainfo;
+	XShmSegmentInfo *yuvshm;
+
+	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 ) {
+			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; ++j ) {
+					if ( (Uint32)formats[j].id == format ) {
+						xv_port = ainfo[i].base_id;
+						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 ) {
+		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;
+
+	/* Create the pixel data and lookup tables */
+	hwdata = (struct private_yuvhwdata *)malloc(sizeof *hwdata);
+	overlay->hwdata = hwdata;
+	if ( hwdata == NULL ) {
+		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);
+	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  = (caddr_t) 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);
+
+	/* We're all done.. */
+	return(overlay);
+}
+
+int X11_LockYUVOverlay(_THIS, SDL_Overlay *overlay)
+{
+	overlay->pixels = overlay->hwdata->image->data;
+	/* What should the pitch be set to? */
+	return(0);
+}
+
+void X11_UnlockYUVOverlay(_THIS, SDL_Overlay *overlay)
+{
+	overlay->pixels = NULL;
+}
+
+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 ) {
+		if ( hwdata->yuvshm.shmaddr ) {
+			XShmDetach(GFX_Display, &hwdata->yuvshm);
+			shmdt(hwdata->yuvshm.shmaddr);
+		}
+		if ( hwdata->image ) {
+			XFree(hwdata->image);
+		}
+		free(hwdata);
+	}
+}
+
+#endif /* XFREE86_XV */