Imported nx-X11-3.1.0-1.tar.gznx-X11/3.1.0-1

Summary: Imported nx-X11-3.1.0-1.tar.gz
Keywords:

Imported nx-X11-3.1.0-1.tar.gz
into Git repository

1 files changed, 796 insertions, 0 deletions

diff --git a/nx-X11/programs/Xserver/Xext/xvmc.c b/nx-X11/programs/Xserver/Xext/xvmc.c
new file mode 100644
index 000000000..37fb153ab
--- /dev/null
+++ b/nx-X11/programs/Xserver/Xext/xvmc.c
@@ -0,0 +1,796 @@
+/* $XFree86: xc/programs/Xserver/Xext/xvmc.c,v 1.8 2003/07/16 01:38:31 dawes Exp $ */
+
+#define NEED_REPLIES
+#define NEED_EVENTS
+#ifdef HAVE_DIX_CONFIG_H
+#include <dix-config.h>
+#endif
+
+#include <X11/X.h>
+#include <X11/Xproto.h>
+#include "misc.h"
+#include "os.h"
+#include "dixstruct.h"
+#include "resource.h"
+#include "scrnintstr.h"
+#include "extnsionst.h"
+#include "servermd.h"
+#include <X11/Xfuncproto.h>
+#include "xvdix.h"
+#include <X11/extensions/XvMC.h>
+#include <X11/extensions/Xvproto.h>
+#include <X11/extensions/XvMCproto.h>
+#include "xvmcext.h"
+
+#ifdef HAS_XVMCSHM
+#ifndef Lynx
+#include <sys/ipc.h>
+#include <sys/types.h>
+#include <sys/shm.h>
+#else
+#include <ipc.h>
+#include <shm.h>
+#endif /* Lynx */
+#endif /* HAS_XVMCSHM */
+   
+
+
+#define DR_CLIENT_DRIVER_NAME_SIZE 48
+#define DR_BUSID_SIZE 48
+
+int XvMCScreenIndex = -1;
+
+unsigned long XvMCGeneration = 0;
+
+int XvMCReqCode;
+int XvMCEventBase;
+int XvMCErrorBase;
+
+unsigned long XvMCRTContext;
+unsigned long XvMCRTSurface;
+unsigned long XvMCRTSubpicture;
+
+typedef struct {
+   int num_adaptors;
+   XvMCAdaptorPtr adaptors;
+   CloseScreenProcPtr	CloseScreen;
+   char clientDriverName[DR_CLIENT_DRIVER_NAME_SIZE];
+   char busID[DR_BUSID_SIZE];
+   int major;
+   int minor;
+   int patchLevel;
+} XvMCScreenRec, *XvMCScreenPtr; 
+
+#define XVMC_GET_PRIVATE(pScreen) \
+   (XvMCScreenPtr)((pScreen)->devPrivates[XvMCScreenIndex].ptr)
+
+
+static int
+XvMCDestroyContextRes(pointer data, XID id)
+{
+   XvMCContextPtr pContext = (XvMCContextPtr)data;
+   
+   pContext->refcnt--;
+
+   if(!pContext->refcnt) {
+  	 XvMCScreenPtr pScreenPriv = XVMC_GET_PRIVATE(pContext->pScreen);
+	(*pScreenPriv->adaptors[pContext->adapt_num].DestroyContext)(pContext);
+	xfree(pContext);
+   }	   
+
+   return Success;
+}
+
+static int
+XvMCDestroySurfaceRes(pointer data, XID id)
+{
+   XvMCSurfacePtr pSurface = (XvMCSurfacePtr)data;
+   XvMCContextPtr pContext = pSurface->context;
+   XvMCScreenPtr pScreenPriv = XVMC_GET_PRIVATE(pContext->pScreen);
+
+   (*pScreenPriv->adaptors[pContext->adapt_num].DestroySurface)(pSurface); 
+   xfree(pSurface);
+
+   XvMCDestroyContextRes((pointer)pContext, pContext->context_id);
+
+   return Success;
+}
+
+
+static int
+XvMCDestroySubpictureRes(pointer data, XID id)
+{
+   XvMCSubpicturePtr pSubpict = (XvMCSubpicturePtr)data;
+   XvMCContextPtr pContext = pSubpict->context;
+   XvMCScreenPtr pScreenPriv = XVMC_GET_PRIVATE(pContext->pScreen);
+
+   (*pScreenPriv->adaptors[pContext->adapt_num].DestroySubpicture)(pSubpict); 
+   xfree(pSubpict);
+
+   XvMCDestroyContextRes((pointer)pContext, pContext->context_id);
+
+   return Success;
+}
+
+static void
+XvMCResetProc (ExtensionEntry *extEntry)
+{
+}
+
+
+static int 
+ProcXvMCQueryVersion(ClientPtr client)
+{
+    xvmcQueryVersionReply rep;
+    /* REQUEST(xvmcQueryVersionReq); */
+    REQUEST_SIZE_MATCH(xvmcQueryVersionReq);
+    rep.type = X_Reply;
+    rep.sequenceNumber = client->sequence;
+    rep.length = 0;
+    rep.major = XvMCVersion;
+    rep.minor = XvMCRevision;
+    WriteToClient(client, sizeof(xvmcQueryVersionReply), (char*)&rep);
+    return Success;
+}
+
+
+static int 
+ProcXvMCListSurfaceTypes(ClientPtr client)
+{
+    XvPortPtr pPort;
+    int i;
+    XvMCScreenPtr pScreenPriv;
+    xvmcListSurfaceTypesReply rep;
+    xvmcSurfaceInfo info;
+    XvMCAdaptorPtr adaptor = NULL;
+    XvMCSurfaceInfoPtr surface;
+    REQUEST(xvmcListSurfaceTypesReq);
+    REQUEST_SIZE_MATCH(xvmcListSurfaceTypesReq);
+
+    if(!(pPort = LOOKUP_PORT(stuff->port, client))) {
+        client->errorValue = stuff->port;
+        return _XvBadPort;
+    }
+
+    if(XvMCScreenIndex >= 0) { /* any adaptors at all */
+       ScreenPtr pScreen = pPort->pAdaptor->pScreen;
+       if((pScreenPriv = XVMC_GET_PRIVATE(pScreen))) {  /* any this screen */
+          for(i = 0; i < pScreenPriv->num_adaptors; i++) {
+             if(pPort->pAdaptor == pScreenPriv->adaptors[i].xv_adaptor) {
+               adaptor = &(pScreenPriv->adaptors[i]);
+               break;
+             }
+          }
+       }
+    }
+
+    rep.type = X_Reply;
+    rep.sequenceNumber = client->sequence;
+    rep.num = (adaptor) ? adaptor->num_surfaces : 0;
+    rep.length = rep.num * sizeof(xvmcSurfaceInfo) >> 2;
+ 
+    WriteToClient(client, sizeof(xvmcListSurfaceTypesReply), (char*)&rep);
+
+    for(i = 0; i < rep.num; i++) {
+	surface = adaptor->surfaces[i];
+	info.surface_type_id = surface->surface_type_id;
+	info.chroma_format = surface->chroma_format;
+	info.max_width = surface->max_width;
+	info.max_height = surface->max_height;
+	info.subpicture_max_width = surface->subpicture_max_width;
+	info.subpicture_max_height = surface->subpicture_max_height;
+	info.mc_type = surface->mc_type;
+	info.flags = surface->flags;
+	WriteToClient(client, sizeof(xvmcSurfaceInfo), (char*)&info);
+    }
+
+    return Success;
+}
+
+static int 
+ProcXvMCCreateContext(ClientPtr client)
+{
+    XvPortPtr pPort;
+    CARD32 *data = NULL;
+    int dwords = 0; 
+    int i, result, adapt_num = -1;
+    ScreenPtr pScreen;
+    XvMCContextPtr pContext;
+    XvMCScreenPtr pScreenPriv;
+    XvMCAdaptorPtr adaptor = NULL;
+    XvMCSurfaceInfoPtr surface = NULL;
+    xvmcCreateContextReply rep;
+    REQUEST(xvmcCreateContextReq);
+    REQUEST_SIZE_MATCH(xvmcCreateContextReq);
+
+    if(!(pPort = LOOKUP_PORT(stuff->port, client))) {
+	client->errorValue = stuff->port;
+	return _XvBadPort;
+    }
+
+    pScreen = pPort->pAdaptor->pScreen;
+
+    if(XvMCScreenIndex < 0) /* no XvMC adaptors */
+       return BadMatch;
+ 
+    if(!(pScreenPriv = XVMC_GET_PRIVATE(pScreen))) /* none this screen */
+       return BadMatch;
+
+    for(i = 0; i < pScreenPriv->num_adaptors; i++) {
+	if(pPort->pAdaptor == pScreenPriv->adaptors[i].xv_adaptor) {
+	    adaptor = &(pScreenPriv->adaptors[i]);
+	    adapt_num = i; 
+	    break;
+	}
+    }
+
+    if(adapt_num < 0) /* none this port */
+	return BadMatch;	
+
+    for(i = 0; i < adaptor->num_surfaces; i++) {
+        if(adaptor->surfaces[i]->surface_type_id == stuff->surface_type_id) {
+            surface = adaptor->surfaces[i];
+            break;
+        }
+    }
+
+    /* adaptor doesn't support this suface_type_id */
+    if(!surface) return BadMatch;
+
+
+    if((stuff->width > surface->max_width) ||
+       (stuff->height > surface->max_height))
+        return BadValue;
+
+    if(!(pContext = xalloc(sizeof(XvMCContextRec)))) {
+	return BadAlloc;
+    }
+
+
+    pContext->pScreen = pScreen;
+    pContext->adapt_num = adapt_num;
+    pContext->context_id = stuff->context_id;
+    pContext->surface_type_id = stuff->surface_type_id;
+    pContext->width = stuff->width;
+    pContext->height = stuff->height;
+    pContext->flags = stuff->flags;
+    pContext->refcnt = 1;
+
+    result = (*adaptor->CreateContext)(pPort, pContext, &dwords, &data);
+
+    if(result != Success) {
+	xfree(pContext);
+	return result;
+    }
+
+    rep.type = X_Reply;
+    rep.sequenceNumber = client->sequence;
+    rep.width_actual = pContext->width; 
+    rep.height_actual = pContext->height; 
+    rep.flags_return = pContext->flags; 
+    rep.length = dwords;
+
+    WriteToClient(client, sizeof(xvmcCreateContextReply), (char*)&rep);
+    if(dwords)
+      WriteToClient(client, dwords << 2, (char*)data); 
+    AddResource(pContext->context_id, XvMCRTContext, pContext);
+
+    if(data)
+	xfree(data);
+
+    return Success;
+}
+
+static int 
+ProcXvMCDestroyContext(ClientPtr client)
+{
+    REQUEST(xvmcDestroyContextReq);
+    REQUEST_SIZE_MATCH(xvmcDestroyContextReq);
+
+    if(!LookupIDByType(stuff->context_id, XvMCRTContext))
+	return (XvMCBadContext + XvMCErrorBase);
+
+    FreeResource(stuff->context_id, RT_NONE); 
+
+    return Success;
+}
+
+static int 
+ProcXvMCCreateSurface(ClientPtr client)
+{
+    CARD32 *data = NULL;
+    int dwords = 0;
+    int result;
+    XvMCContextPtr pContext;
+    XvMCSurfacePtr pSurface;
+    XvMCScreenPtr pScreenPriv;
+    xvmcCreateSurfaceReply rep;
+    REQUEST(xvmcCreateSurfaceReq);
+    REQUEST_SIZE_MATCH(xvmcCreateSurfaceReq);
+
+    if(!(pContext = LookupIDByType(stuff->context_id, XvMCRTContext)))
+        return (XvMCBadContext + XvMCErrorBase);
+
+    pScreenPriv = XVMC_GET_PRIVATE(pContext->pScreen);
+
+    if(!(pSurface = xalloc(sizeof(XvMCSurfaceRec)))) 
+        return BadAlloc;
+
+    pSurface->surface_id = stuff->surface_id;
+    pSurface->surface_type_id = pContext->surface_type_id;
+    pSurface->context = pContext;
+
+    result = (*pScreenPriv->adaptors[pContext->adapt_num].CreateSurface)(
+                pSurface, &dwords, &data);
+
+    if(result != Success) {
+        xfree(pSurface);
+        return result;
+    }
+
+    rep.type = X_Reply;
+    rep.sequenceNumber = client->sequence;
+    rep.length = dwords;
+
+    WriteToClient(client, sizeof(xvmcCreateSurfaceReply), (char*)&rep);
+    if(dwords)
+      WriteToClient(client, dwords << 2, (char*)data);
+    AddResource(pSurface->surface_id, XvMCRTSurface, pSurface);
+
+    if(data)
+        xfree(data);
+
+    pContext->refcnt++;
+
+    return Success;
+}
+
+static int 
+ProcXvMCDestroySurface(ClientPtr client)
+{
+    REQUEST(xvmcDestroySurfaceReq);
+    REQUEST_SIZE_MATCH(xvmcDestroySurfaceReq);
+
+    if(!LookupIDByType(stuff->surface_id, XvMCRTSurface))
+        return (XvMCBadSurface + XvMCErrorBase);
+
+    FreeResource(stuff->surface_id, RT_NONE);
+
+    return Success;
+}
+
+static int 
+ProcXvMCCreateSubpicture(ClientPtr client)
+{
+    Bool image_supported = FALSE;
+    CARD32 *data = NULL;
+    int i, result, dwords = 0;
+    XvMCContextPtr pContext;
+    XvMCSubpicturePtr pSubpicture;
+    XvMCScreenPtr pScreenPriv;
+    xvmcCreateSubpictureReply rep;
+    XvMCAdaptorPtr adaptor;
+    XvMCSurfaceInfoPtr surface = NULL;
+    REQUEST(xvmcCreateSubpictureReq);
+    REQUEST_SIZE_MATCH(xvmcCreateSubpictureReq);
+
+    if(!(pContext = LookupIDByType(stuff->context_id, XvMCRTContext)))
+        return (XvMCBadContext + XvMCErrorBase);
+
+    pScreenPriv = XVMC_GET_PRIVATE(pContext->pScreen);
+
+    adaptor = &(pScreenPriv->adaptors[pContext->adapt_num]); 
+
+    /* find which surface this context supports */
+    for(i = 0; i < adaptor->num_surfaces; i++) {
+	if(adaptor->surfaces[i]->surface_type_id == pContext->surface_type_id){
+	   surface = adaptor->surfaces[i];
+	   break;
+	}
+    } 
+
+    if(!surface) return BadMatch;
+
+    /* make sure this surface supports that xvimage format */
+    if(!surface->compatible_subpictures) return BadMatch;
+
+    for(i = 0; i < surface->compatible_subpictures->num_xvimages; i++) {
+      if(surface->compatible_subpictures->xvimage_ids[i] == stuff->xvimage_id) {
+	   image_supported = TRUE;
+	   break;
+      }
+    }
+
+    if(!image_supported) return BadMatch;
+
+    /* make sure the size is OK */
+    if((stuff->width > surface->subpicture_max_width) ||
+       (stuff->height > surface->subpicture_max_height))
+	return BadValue;
+
+    if(!(pSubpicture = xalloc(sizeof(XvMCSubpictureRec))))
+        return BadAlloc;
+
+    pSubpicture->subpicture_id = stuff->subpicture_id;
+    pSubpicture->xvimage_id = stuff->xvimage_id;
+    pSubpicture->width = stuff->width;
+    pSubpicture->height = stuff->height;
+    pSubpicture->num_palette_entries = 0; /* overwritten by DDX */
+    pSubpicture->entry_bytes = 0;         /* overwritten by DDX */
+    pSubpicture->component_order[0] = 0;  /* overwritten by DDX */
+    pSubpicture->component_order[1] = 0;
+    pSubpicture->component_order[2] = 0;
+    pSubpicture->component_order[3] = 0;
+    pSubpicture->context = pContext;
+   
+    result = (*pScreenPriv->adaptors[pContext->adapt_num].CreateSubpicture)(
+                pSubpicture, &dwords, &data);
+
+    if(result != Success) {
+        xfree(pSubpicture);
+        return result;
+    }
+
+    rep.type = X_Reply;
+    rep.sequenceNumber = client->sequence;
+    rep.width_actual = pSubpicture->width;
+    rep.height_actual = pSubpicture->height;
+    rep.num_palette_entries = pSubpicture->num_palette_entries;
+    rep.entry_bytes = pSubpicture->entry_bytes;
+    rep.component_order[0] = pSubpicture->component_order[0];
+    rep.component_order[1] = pSubpicture->component_order[1];
+    rep.component_order[2] = pSubpicture->component_order[2];
+    rep.component_order[3] = pSubpicture->component_order[3];
+    rep.length = dwords;
+
+    WriteToClient(client, sizeof(xvmcCreateSubpictureReply), (char*)&rep);
+    if(dwords)
+      WriteToClient(client, dwords << 2, (char*)data);
+    AddResource(pSubpicture->subpicture_id, XvMCRTSubpicture, pSubpicture);
+
+    if(data)
+        xfree(data);
+
+    pContext->refcnt++;
+
+    return Success;
+}
+
+static int 
+ProcXvMCDestroySubpicture(ClientPtr client)
+{
+    REQUEST(xvmcDestroySubpictureReq);
+    REQUEST_SIZE_MATCH(xvmcDestroySubpictureReq);
+
+    if(!LookupIDByType(stuff->subpicture_id, XvMCRTSubpicture))
+        return (XvMCBadSubpicture + XvMCErrorBase);
+
+    FreeResource(stuff->subpicture_id, RT_NONE);
+
+    return Success;
+}
+
+
+static int
+ProcXvMCListSubpictureTypes(ClientPtr client)
+{
+    XvPortPtr pPort;
+    xvmcListSubpictureTypesReply rep;
+    XvMCScreenPtr pScreenPriv;
+    ScreenPtr pScreen;
+    XvMCAdaptorPtr adaptor = NULL;
+    XvMCSurfaceInfoPtr surface = NULL;
+    xvImageFormatInfo info;
+    XvImagePtr pImage;
+    int i, j;
+    REQUEST(xvmcListSubpictureTypesReq);
+    REQUEST_SIZE_MATCH(xvmcListSubpictureTypesReq);
+
+    if(!(pPort = LOOKUP_PORT(stuff->port, client))) {
+        client->errorValue = stuff->port;
+        return _XvBadPort;
+    }
+
+    pScreen = pPort->pAdaptor->pScreen;
+
+    if(XvMCScreenIndex < 0) /* No XvMC adaptors */
+        return BadMatch;
+
+    if(!(pScreenPriv = XVMC_GET_PRIVATE(pScreen)))
+        return BadMatch;   /* None this screen */
+
+    for(i = 0; i < pScreenPriv->num_adaptors; i++) {
+        if(pPort->pAdaptor == pScreenPriv->adaptors[i].xv_adaptor) {
+            adaptor = &(pScreenPriv->adaptors[i]);
+            break;
+        }
+    }
+
+    if(!adaptor) return BadMatch;
+
+    for(i = 0; i < adaptor->num_surfaces; i++) {
+        if(adaptor->surfaces[i]->surface_type_id == stuff->surface_type_id) {
+            surface = adaptor->surfaces[i];
+            break;
+        }
+    }
+
+    if(!surface) return BadMatch;
+
+    rep.type = X_Reply;
+    rep.sequenceNumber = client->sequence;
+    rep.num = 0;
+    if(surface->compatible_subpictures) 
+	rep.num = surface->compatible_subpictures->num_xvimages;
+
+    rep.length = rep.num * sizeof(xvImageFormatInfo) >> 2;
+
+    WriteToClient(client, sizeof(xvmcListSubpictureTypesReply), (char*)&rep);
+
+    for(i = 0; i < rep.num; i++) {
+	pImage = NULL;
+	for(j = 0; j < adaptor->num_subpictures; j++) {
+	    if(surface->compatible_subpictures->xvimage_ids[i] ==
+	       adaptor->subpictures[j]->id)
+	    {
+		pImage = adaptor->subpictures[j];
+	        break;
+	    }
+	}
+	if(!pImage) return BadImplementation;
+
+        info.id = pImage->id;      
+	info.type = pImage->type;  
+        info.byte_order = pImage->byte_order; 
+        memcpy(&info.guid, pImage->guid, 16);      
+        info.bpp = pImage->bits_per_pixel;         
+        info.num_planes = pImage->num_planes;      
+        info.depth = pImage->depth;        
+        info.red_mask = pImage->red_mask;  
+        info.green_mask = pImage->green_mask;      
+        info.blue_mask = pImage->blue_mask;        
+        info.format = pImage->format;      
+        info.y_sample_bits = pImage->y_sample_bits;        
+        info.u_sample_bits = pImage->u_sample_bits;        
+        info.v_sample_bits = pImage->v_sample_bits;        
+        info.horz_y_period = pImage->horz_y_period;        
+        info.horz_u_period = pImage->horz_u_period;        
+        info.horz_v_period = pImage->horz_v_period;        
+        info.vert_y_period = pImage->vert_y_period;        
+        info.vert_u_period = pImage->vert_u_period;        
+        info.vert_v_period = pImage->vert_v_period;        
+        memcpy(&info.comp_order, pImage->component_order, 32);     
+        info.scanline_order = pImage->scanline_order;
+	WriteToClient(client, sizeof(xvImageFormatInfo), (char*)&info);
+    }
+
+    return Success;
+}
+
+static int
+ProcXvMCGetDRInfo(ClientPtr client)
+{
+    xvmcGetDRInfoReply rep;
+    XvPortPtr pPort;
+    ScreenPtr pScreen;
+    XvMCScreenPtr pScreenPriv;
+
+#ifdef HAS_XVMCSHM
+    volatile CARD32 *patternP;
+#endif
+
+    REQUEST(xvmcGetDRInfoReq);
+    REQUEST_SIZE_MATCH(xvmcGetDRInfoReq);
+
+
+    if(!(pPort = LOOKUP_PORT(stuff->port, client))) {
+	client->errorValue = stuff->port;
+	return _XvBadPort;
+    }
+
+    pScreen = pPort->pAdaptor->pScreen;
+    pScreenPriv = XVMC_GET_PRIVATE(pScreen);
+    
+    rep.type = X_Reply;
+    rep.sequenceNumber = client->sequence;
+    rep.major = pScreenPriv->major;
+    rep.minor = pScreenPriv->minor;
+    rep.patchLevel = pScreenPriv->patchLevel;
+    rep.nameLen = (strlen(pScreenPriv->clientDriverName) + 4) >> 2;
+    rep.busIDLen = (strlen(pScreenPriv->busID) + 4) >> 2;
+
+    rep.length = rep.nameLen + rep.busIDLen;
+    rep.nameLen <<=2;
+    rep.busIDLen <<=2;
+
+    /*
+     * Read back to the client what she has put in the shared memory
+     * segment she prepared for us.
+     */
+
+    rep.isLocal = 1;
+#ifdef HAS_XVMCSHM
+    patternP = (CARD32 *)shmat( stuff->shmKey, NULL, SHM_RDONLY );
+    if ( -1 != (long) patternP) {
+        register volatile CARD32 *patternC = patternP;
+	register int i;
+	CARD32 magic = stuff->magic;
+	
+	rep.isLocal = 1;
+	i = 1024 / sizeof(CARD32);
+	
+	while ( i-- ) {
+	    if (*patternC++ != magic) {
+		rep.isLocal = 0;
+		break;
+	    }
+	    magic = ~magic;
+	}
+	shmdt( (char *)patternP ); 
+    }
+#endif /* HAS_XVMCSHM */
+    
+    WriteToClient(client, sizeof(xvmcGetDRInfoReply), 
+		  (char*)&rep);
+    if (rep.length) {      
+	WriteToClient(client, rep.nameLen, 
+		      pScreenPriv->clientDriverName);
+	WriteToClient(client, rep.busIDLen, 
+		      pScreenPriv->busID);
+    }	
+    return Success;
+}
+
+
+int (*ProcXvMCVector[xvmcNumRequest])(ClientPtr) = {
+  ProcXvMCQueryVersion,
+  ProcXvMCListSurfaceTypes,
+  ProcXvMCCreateContext,
+  ProcXvMCDestroyContext,
+  ProcXvMCCreateSurface,
+  ProcXvMCDestroySurface,
+  ProcXvMCCreateSubpicture,
+  ProcXvMCDestroySubpicture,
+  ProcXvMCListSubpictureTypes,
+  ProcXvMCGetDRInfo
+};
+
+static int
+ProcXvMCDispatch (ClientPtr client)
+{
+    REQUEST(xReq);
+    
+    if(stuff->data < xvmcNumRequest)
+	return (*ProcXvMCVector[stuff->data])(client);
+    else
+	return BadRequest;
+}
+
+static int
+SProcXvMCDispatch (ClientPtr client)
+{
+    /* We only support local */
+    return BadImplementation;
+}
+
+void 
+XvMCExtensionInit()
+{
+   ExtensionEntry *extEntry;
+
+   if(XvMCScreenIndex < 0) /* nobody supports it */
+	return; 
+
+   if(!(XvMCRTContext = CreateNewResourceType(XvMCDestroyContextRes)))
+	return;
+
+   if(!(XvMCRTSurface = CreateNewResourceType(XvMCDestroySurfaceRes)))
+	return;
+
+   if(!(XvMCRTSubpicture = CreateNewResourceType(XvMCDestroySubpictureRes)))
+	return;
+
+   extEntry = AddExtension(XvMCName, XvMCNumEvents, XvMCNumErrors, 
+                              ProcXvMCDispatch, SProcXvMCDispatch,
+                              XvMCResetProc, StandardMinorOpcode);
+
+   if(!extEntry) return;
+  
+   XvMCReqCode = extEntry->base;
+   XvMCEventBase = extEntry->eventBase;
+   XvMCErrorBase = extEntry->errorBase;
+}
+
+static Bool
+XvMCCloseScreen (int i, ScreenPtr pScreen)
+{
+    XvMCScreenPtr pScreenPriv = XVMC_GET_PRIVATE(pScreen);
+
+    pScreen->CloseScreen = pScreenPriv->CloseScreen;
+
+    xfree(pScreenPriv);
+
+    return (*pScreen->CloseScreen)(i, pScreen);
+}
+
+
+int
+XvMCScreenInit(ScreenPtr pScreen, int num, XvMCAdaptorPtr pAdapt)
+{
+   XvMCScreenPtr pScreenPriv;
+
+   if(XvMCGeneration != serverGeneration) {
+	if((XvMCScreenIndex = AllocateScreenPrivateIndex()) < 0)
+	   return BadAlloc;
+
+	XvMCGeneration = serverGeneration;
+   }
+
+   if(!(pScreenPriv = (XvMCScreenPtr)xalloc(sizeof(XvMCScreenRec))))
+	return BadAlloc;
+
+   pScreen->devPrivates[XvMCScreenIndex].ptr = (pointer)pScreenPriv;
+
+   pScreenPriv->CloseScreen = pScreen->CloseScreen;
+   pScreen->CloseScreen = XvMCCloseScreen;
+
+   pScreenPriv->num_adaptors = num;
+   pScreenPriv->adaptors = pAdapt;
+   pScreenPriv->clientDriverName[0] = 0;
+   pScreenPriv->busID[0] = 0;
+   pScreenPriv->major = 0;
+   pScreenPriv->minor = 0;
+   pScreenPriv->patchLevel = 0;
+
+   return Success;
+}
+
+XvImagePtr XvMCFindXvImage(XvPortPtr pPort, CARD32 id)
+{
+    XvImagePtr pImage = NULL;
+    ScreenPtr pScreen = pPort->pAdaptor->pScreen;
+    XvMCScreenPtr pScreenPriv;
+    XvMCAdaptorPtr adaptor = NULL;
+    int i;
+
+    if(XvMCScreenIndex < 0) return NULL;
+
+    if(!(pScreenPriv = XVMC_GET_PRIVATE(pScreen))) 
+        return NULL;
+
+    for(i = 0; i < pScreenPriv->num_adaptors; i++) {
+       if(pPort->pAdaptor == pScreenPriv->adaptors[i].xv_adaptor) {
+          adaptor = &(pScreenPriv->adaptors[i]);
+          break;
+       }
+    }
+
+    if(!adaptor) return NULL;
+
+    for(i = 0; i < adaptor->num_subpictures; i++) {
+        if(adaptor->subpictures[i]->id == id) {
+            pImage = adaptor->subpictures[i];
+            break;
+        }
+    }
+
+    return pImage;
+}
+
+int
+xf86XvMCRegisterDRInfo(ScreenPtr pScreen, char *name,
+		       char *busID, int major, int minor,
+		       int patchLevel)
+{
+    XvMCScreenPtr pScreenPriv = XVMC_GET_PRIVATE(pScreen);
+    strncpy(pScreenPriv->clientDriverName, name,
+	    DR_CLIENT_DRIVER_NAME_SIZE);
+    strncpy(pScreenPriv->busID, busID, DR_BUSID_SIZE);
+    pScreenPriv->major = major;
+    pScreenPriv->minor = minor;
+    pScreenPriv->patchLevel = patchLevel;
+    pScreenPriv->clientDriverName[DR_CLIENT_DRIVER_NAME_SIZE-1] = 0;
+    pScreenPriv->busID[DR_BUSID_SIZE-1] = 0;
+    return Success;
+}
+