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-rw-r--r--xorg-server/Xext/shm.c1309
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diff --git a/xorg-server/Xext/shm.c b/xorg-server/Xext/shm.c
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+++ b/xorg-server/Xext/shm.c
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+/************************************************************
+
+Copyright 1989, 1998 The Open Group
+
+Permission to use, copy, modify, distribute, and sell this software and its
+documentation for any purpose is hereby granted without fee, provided that
+the above copyright notice appear in all copies and that both that
+copyright notice and this permission notice appear in supporting
+documentation.
+
+The above copyright notice and this permission notice 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 NONINFRINGEMENT. IN NO EVENT SHALL THE
+OPEN GROUP 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.
+
+Except as contained in this notice, the name of The Open Group shall not be
+used in advertising or otherwise to promote the sale, use or other dealings
+in this Software without prior written authorization from The Open Group.
+
+********************************************************/
+
+/* THIS IS NOT AN X CONSORTIUM STANDARD OR AN X PROJECT TEAM SPECIFICATION */
+
+
+#define SHM
+
+#ifdef HAVE_DIX_CONFIG_H
+#include <dix-config.h>
+#endif
+
+#include <sys/types.h>
+#ifndef Lynx
+#include <sys/ipc.h>
+#include <sys/shm.h>
+#else
+#include <ipc.h>
+#include <shm.h>
+#endif
+#include <unistd.h>
+#include <sys/stat.h>
+#define NEED_REPLIES
+#define NEED_EVENTS
+#include <X11/X.h>
+#include <X11/Xproto.h>
+#include "misc.h"
+#include "os.h"
+#include "dixstruct.h"
+#include "resource.h"
+#include "scrnintstr.h"
+#include "windowstr.h"
+#include "pixmapstr.h"
+#include "gcstruct.h"
+#include "extnsionst.h"
+#include "servermd.h"
+#include "shmint.h"
+#include "xace.h"
+#define _XSHM_SERVER_
+#include <X11/extensions/shmstr.h>
+#include <X11/Xfuncproto.h>
+
+/* Needed for Solaris cross-zone shared memory extension */
+#ifdef HAVE_SHMCTL64
+#include <sys/ipc_impl.h>
+#define SHMSTAT(id, buf) shmctl64(id, IPC_STAT64, buf)
+#define SHMSTAT_TYPE struct shmid_ds64
+#define SHMPERM_TYPE struct ipc_perm64
+#define SHM_PERM(buf) buf.shmx_perm
+#define SHM_SEGSZ(buf) buf.shmx_segsz
+#define SHMPERM_UID(p) p->ipcx_uid
+#define SHMPERM_CUID(p) p->ipcx_cuid
+#define SHMPERM_GID(p) p->ipcx_gid
+#define SHMPERM_CGID(p) p->ipcx_cgid
+#define SHMPERM_MODE(p) p->ipcx_mode
+#define SHMPERM_ZONEID(p) p->ipcx_zoneid
+#else
+#define SHMSTAT(id, buf) shmctl(id, IPC_STAT, buf)
+#define SHMSTAT_TYPE struct shmid_ds
+#define SHMPERM_TYPE struct ipc_perm
+#define SHM_PERM(buf) buf.shm_perm
+#define SHM_SEGSZ(buf) buf.shm_segsz
+#define SHMPERM_UID(p) p->uid
+#define SHMPERM_CUID(p) p->cuid
+#define SHMPERM_GID(p) p->gid
+#define SHMPERM_CGID(p) p->cgid
+#define SHMPERM_MODE(p) p->mode
+#endif
+
+#ifdef PANORAMIX
+#include "panoramiX.h"
+#include "panoramiXsrv.h"
+#endif
+
+#include "modinit.h"
+
+typedef struct _ShmDesc {
+ struct _ShmDesc *next;
+ int shmid;
+ int refcnt;
+ char *addr;
+ Bool writable;
+ unsigned long size;
+} ShmDescRec, *ShmDescPtr;
+
+static PixmapPtr fbShmCreatePixmap(XSHM_CREATE_PIXMAP_ARGS);
+static int ShmDetachSegment(
+ pointer /* value */,
+ XID /* shmseg */
+ );
+static void ShmResetProc(
+ ExtensionEntry * /* extEntry */
+ );
+static void SShmCompletionEvent(
+ xShmCompletionEvent * /* from */,
+ xShmCompletionEvent * /* to */
+ );
+
+static Bool ShmDestroyPixmap (PixmapPtr pPixmap);
+
+static DISPATCH_PROC(ProcShmAttach);
+static DISPATCH_PROC(ProcShmCreatePixmap);
+static DISPATCH_PROC(ProcShmDetach);
+static DISPATCH_PROC(ProcShmDispatch);
+static DISPATCH_PROC(ProcShmGetImage);
+static DISPATCH_PROC(ProcShmPutImage);
+static DISPATCH_PROC(ProcShmQueryVersion);
+static DISPATCH_PROC(SProcShmAttach);
+static DISPATCH_PROC(SProcShmCreatePixmap);
+static DISPATCH_PROC(SProcShmDetach);
+static DISPATCH_PROC(SProcShmDispatch);
+static DISPATCH_PROC(SProcShmGetImage);
+static DISPATCH_PROC(SProcShmPutImage);
+static DISPATCH_PROC(SProcShmQueryVersion);
+
+static unsigned char ShmReqCode;
+_X_EXPORT int ShmCompletionCode;
+_X_EXPORT int BadShmSegCode;
+_X_EXPORT RESTYPE ShmSegType;
+static ShmDescPtr Shmsegs;
+static Bool sharedPixmaps;
+static int pixmapFormat;
+static int shmPixFormat[MAXSCREENS];
+static ShmFuncsPtr shmFuncs[MAXSCREENS];
+static DestroyPixmapProcPtr destroyPixmap[MAXSCREENS];
+static DevPrivateKey shmPixmapPrivate = &shmPixmapPrivate;
+static ShmFuncs miFuncs = {NULL, NULL};
+static ShmFuncs fbFuncs = {fbShmCreatePixmap, NULL};
+
+#define VERIFY_SHMSEG(shmseg,shmdesc,client) \
+{ \
+ shmdesc = (ShmDescPtr)LookupIDByType(shmseg, ShmSegType); \
+ if (!shmdesc) \
+ { \
+ client->errorValue = shmseg; \
+ return BadShmSegCode; \
+ } \
+}
+
+#define VERIFY_SHMPTR(shmseg,offset,needwrite,shmdesc,client) \
+{ \
+ VERIFY_SHMSEG(shmseg, shmdesc, client); \
+ if ((offset & 3) || (offset > shmdesc->size)) \
+ { \
+ client->errorValue = offset; \
+ return BadValue; \
+ } \
+ if (needwrite && !shmdesc->writable) \
+ return BadAccess; \
+}
+
+#define VERIFY_SHMSIZE(shmdesc,offset,len,client) \
+{ \
+ if ((offset + len) > shmdesc->size) \
+ { \
+ return BadAccess; \
+ } \
+}
+
+
+#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__CYGWIN__) || defined(__DragonFly__)
+#include <sys/signal.h>
+
+static Bool badSysCall = FALSE;
+
+static void
+SigSysHandler(signo)
+int signo;
+{
+ badSysCall = TRUE;
+}
+
+static Bool CheckForShmSyscall()
+{
+ void (*oldHandler)();
+ int shmid = -1;
+
+ /* If no SHM support in the kernel, the bad syscall will generate SIGSYS */
+ oldHandler = signal(SIGSYS, SigSysHandler);
+
+ badSysCall = FALSE;
+ shmid = shmget(IPC_PRIVATE, 4096, IPC_CREAT);
+
+ if (shmid != -1)
+ {
+ /* Successful allocation - clean up */
+ shmctl(shmid, IPC_RMID, (struct shmid_ds *)NULL);
+ }
+ else
+ {
+ /* Allocation failed */
+ badSysCall = TRUE;
+ }
+ signal(SIGSYS, oldHandler);
+ return(!badSysCall);
+}
+
+#define MUST_CHECK_FOR_SHM_SYSCALL
+
+#endif
+
+void
+ShmExtensionInit(INITARGS)
+{
+ ExtensionEntry *extEntry;
+ int i;
+
+#ifdef MUST_CHECK_FOR_SHM_SYSCALL
+ if (!CheckForShmSyscall())
+ {
+ ErrorF("MIT-SHM extension disabled due to lack of kernel support\n");
+ return;
+ }
+#endif
+
+ sharedPixmaps = xFalse;
+ pixmapFormat = 0;
+ {
+ sharedPixmaps = xTrue;
+ pixmapFormat = shmPixFormat[0];
+ for (i = 0; i < screenInfo.numScreens; i++)
+ {
+ if (!shmFuncs[i])
+ shmFuncs[i] = &miFuncs;
+ if (!shmFuncs[i]->CreatePixmap)
+ sharedPixmaps = xFalse;
+ if (shmPixFormat[i] && (shmPixFormat[i] != pixmapFormat))
+ {
+ sharedPixmaps = xFalse;
+ pixmapFormat = 0;
+ }
+ }
+ if (!pixmapFormat)
+ pixmapFormat = ZPixmap;
+ if (sharedPixmaps)
+ for (i = 0; i < screenInfo.numScreens; i++)
+ {
+ destroyPixmap[i] = screenInfo.screens[i]->DestroyPixmap;
+ screenInfo.screens[i]->DestroyPixmap = ShmDestroyPixmap;
+ }
+ }
+ ShmSegType = CreateNewResourceType(ShmDetachSegment);
+ if (ShmSegType &&
+ (extEntry = AddExtension(SHMNAME, ShmNumberEvents, ShmNumberErrors,
+ ProcShmDispatch, SProcShmDispatch,
+ ShmResetProc, StandardMinorOpcode)))
+ {
+ ShmReqCode = (unsigned char)extEntry->base;
+ ShmCompletionCode = extEntry->eventBase;
+ BadShmSegCode = extEntry->errorBase;
+ EventSwapVector[ShmCompletionCode] = (EventSwapPtr) SShmCompletionEvent;
+ }
+}
+
+/*ARGSUSED*/
+static void
+ShmResetProc (extEntry)
+ExtensionEntry *extEntry;
+{
+ int i;
+
+ for (i = 0; i < MAXSCREENS; i++)
+ {
+ shmFuncs[i] = (ShmFuncsPtr)NULL;
+ shmPixFormat[i] = 0;
+ }
+}
+
+void
+ShmRegisterFuncs(
+ ScreenPtr pScreen,
+ ShmFuncsPtr funcs)
+{
+ shmFuncs[pScreen->myNum] = funcs;
+}
+
+void
+ShmSetPixmapFormat(
+ ScreenPtr pScreen,
+ int format)
+{
+ shmPixFormat[pScreen->myNum] = format;
+}
+
+static Bool
+ShmDestroyPixmap (PixmapPtr pPixmap)
+{
+ ScreenPtr pScreen = pPixmap->drawable.pScreen;
+ Bool ret;
+ if (pPixmap->refcnt == 1)
+ {
+ ShmDescPtr shmdesc;
+ shmdesc = (ShmDescPtr)dixLookupPrivate(&pPixmap->devPrivates,
+ shmPixmapPrivate);
+ if (shmdesc)
+ ShmDetachSegment ((pointer) shmdesc, pPixmap->drawable.id);
+ }
+
+ pScreen->DestroyPixmap = destroyPixmap[pScreen->myNum];
+ ret = (*pScreen->DestroyPixmap) (pPixmap);
+ destroyPixmap[pScreen->myNum] = pScreen->DestroyPixmap;
+ pScreen->DestroyPixmap = ShmDestroyPixmap;
+ return ret;
+}
+
+void
+ShmRegisterFbFuncs(pScreen)
+ ScreenPtr pScreen;
+{
+ shmFuncs[pScreen->myNum] = &fbFuncs;
+}
+
+static int
+ProcShmQueryVersion(client)
+ register ClientPtr client;
+{
+ xShmQueryVersionReply rep;
+ register int n;
+
+ REQUEST_SIZE_MATCH(xShmQueryVersionReq);
+ rep.type = X_Reply;
+ rep.length = 0;
+ rep.sequenceNumber = client->sequence;
+ rep.sharedPixmaps = sharedPixmaps;
+ rep.pixmapFormat = pixmapFormat;
+ rep.majorVersion = SHM_MAJOR_VERSION;
+ rep.minorVersion = SHM_MINOR_VERSION;
+ rep.uid = geteuid();
+ rep.gid = getegid();
+ if (client->swapped) {
+ swaps(&rep.sequenceNumber, n);
+ swapl(&rep.length, n);
+ swaps(&rep.majorVersion, n);
+ swaps(&rep.minorVersion, n);
+ swaps(&rep.uid, n);
+ swaps(&rep.gid, n);
+ }
+ WriteToClient(client, sizeof(xShmQueryVersionReply), (char *)&rep);
+ return (client->noClientException);
+}
+
+/*
+ * Simulate the access() system call for a shared memory segement,
+ * using the credentials from the client if available
+ */
+static int
+shm_access(ClientPtr client, SHMPERM_TYPE *perm, int readonly)
+{
+ int uid, gid;
+ mode_t mask;
+ int uidset = 0, gidset = 0;
+ LocalClientCredRec *lcc;
+
+ if (GetLocalClientCreds(client, &lcc) != -1) {
+
+ if (lcc->fieldsSet & LCC_UID_SET) {
+ uid = lcc->euid;
+ uidset = 1;
+ }
+ if (lcc->fieldsSet & LCC_GID_SET) {
+ gid = lcc->egid;
+ gidset = 1;
+ }
+
+#if defined(HAVE_GETZONEID) && defined(SHMPERM_ZONEID)
+ if ( ((lcc->fieldsSet & LCC_ZID_SET) == 0) || (lcc->zoneid == -1)
+ || (lcc->zoneid != SHMPERM_ZONEID(perm))) {
+ uidset = 0;
+ gidset = 0;
+ }
+#endif
+ FreeLocalClientCreds(lcc);
+
+ if (uidset) {
+ /* User id 0 always gets access */
+ if (uid == 0) {
+ return 0;
+ }
+ /* Check the owner */
+ if (SHMPERM_UID(perm) == uid || SHMPERM_CUID(perm) == uid) {
+ mask = S_IRUSR;
+ if (!readonly) {
+ mask |= S_IWUSR;
+ }
+ return (SHMPERM_MODE(perm) & mask) == mask ? 0 : -1;
+ }
+ }
+
+ if (gidset) {
+ /* Check the group */
+ if (SHMPERM_GID(perm) == gid || SHMPERM_CGID(perm) == gid) {
+ mask = S_IRGRP;
+ if (!readonly) {
+ mask |= S_IWGRP;
+ }
+ return (SHMPERM_MODE(perm) & mask) == mask ? 0 : -1;
+ }
+ }
+ }
+ /* Otherwise, check everyone else */
+ mask = S_IROTH;
+ if (!readonly) {
+ mask |= S_IWOTH;
+ }
+ return (SHMPERM_MODE(perm) & mask) == mask ? 0 : -1;
+}
+
+static int
+ProcShmAttach(client)
+ register ClientPtr client;
+{
+ SHMSTAT_TYPE buf;
+ ShmDescPtr shmdesc;
+ REQUEST(xShmAttachReq);
+
+ REQUEST_SIZE_MATCH(xShmAttachReq);
+ LEGAL_NEW_RESOURCE(stuff->shmseg, client);
+ if ((stuff->readOnly != xTrue) && (stuff->readOnly != xFalse))
+ {
+ client->errorValue = stuff->readOnly;
+ return(BadValue);
+ }
+ for (shmdesc = Shmsegs;
+ shmdesc && (shmdesc->shmid != stuff->shmid);
+ shmdesc = shmdesc->next)
+ ;
+ if (shmdesc)
+ {
+ if (!stuff->readOnly && !shmdesc->writable)
+ return BadAccess;
+ shmdesc->refcnt++;
+ }
+ else
+ {
+ shmdesc = (ShmDescPtr) xalloc(sizeof(ShmDescRec));
+ if (!shmdesc)
+ return BadAlloc;
+ shmdesc->addr = shmat(stuff->shmid, 0,
+ stuff->readOnly ? SHM_RDONLY : 0);
+ if ((shmdesc->addr == ((char *)-1)) ||
+ SHMSTAT(stuff->shmid, &buf))
+ {
+ xfree(shmdesc);
+ return BadAccess;
+ }
+
+ /* The attach was performed with root privs. We must
+ * do manual checking of access rights for the credentials
+ * of the client */
+
+ if (shm_access(client, &(SHM_PERM(buf)), stuff->readOnly) == -1) {
+ shmdt(shmdesc->addr);
+ xfree(shmdesc);
+ return BadAccess;
+ }
+
+ shmdesc->shmid = stuff->shmid;
+ shmdesc->refcnt = 1;
+ shmdesc->writable = !stuff->readOnly;
+ shmdesc->size = SHM_SEGSZ(buf);
+ shmdesc->next = Shmsegs;
+ Shmsegs = shmdesc;
+ }
+ if (!AddResource(stuff->shmseg, ShmSegType, (pointer)shmdesc))
+ return BadAlloc;
+ return(client->noClientException);
+}
+
+/*ARGSUSED*/
+static int
+ShmDetachSegment(value, shmseg)
+ pointer value; /* must conform to DeleteType */
+ XID shmseg;
+{
+ ShmDescPtr shmdesc = (ShmDescPtr)value;
+ ShmDescPtr *prev;
+
+ if (--shmdesc->refcnt)
+ return TRUE;
+ shmdt(shmdesc->addr);
+ for (prev = &Shmsegs; *prev != shmdesc; prev = &(*prev)->next)
+ ;
+ *prev = shmdesc->next;
+ xfree(shmdesc);
+ return Success;
+}
+
+static int
+ProcShmDetach(client)
+ register ClientPtr client;
+{
+ ShmDescPtr shmdesc;
+ REQUEST(xShmDetachReq);
+
+ REQUEST_SIZE_MATCH(xShmDetachReq);
+ VERIFY_SHMSEG(stuff->shmseg, shmdesc, client);
+ FreeResource(stuff->shmseg, RT_NONE);
+ return(client->noClientException);
+}
+
+/*
+ * If the given request doesn't exactly match PutImage's constraints,
+ * wrap the image in a scratch pixmap header and let CopyArea sort it out.
+ */
+static void
+doShmPutImage(DrawablePtr dst, GCPtr pGC,
+ int depth, unsigned int format,
+ int w, int h, int sx, int sy, int sw, int sh, int dx, int dy,
+ char *data)
+{
+ PixmapPtr pPixmap;
+
+ pPixmap = GetScratchPixmapHeader(dst->pScreen, w, h, depth,
+ BitsPerPixel(depth),
+ PixmapBytePad(w, depth),
+ data);
+ if (!pPixmap)
+ return;
+ pGC->ops->CopyArea((DrawablePtr)pPixmap, dst, pGC, sx, sy, sw, sh, dx, dy);
+ FreeScratchPixmapHeader(pPixmap);
+}
+
+#ifdef PANORAMIX
+static int
+ProcPanoramiXShmPutImage(register ClientPtr client)
+{
+ int j, result = 0, orig_x, orig_y;
+ PanoramiXRes *draw, *gc;
+ Bool sendEvent, isRoot;
+
+ REQUEST(xShmPutImageReq);
+ REQUEST_SIZE_MATCH(xShmPutImageReq);
+
+ if(!(draw = (PanoramiXRes *)SecurityLookupIDByClass(
+ client, stuff->drawable, XRC_DRAWABLE, DixWriteAccess)))
+ return BadDrawable;
+
+ if(!(gc = (PanoramiXRes *)SecurityLookupIDByType(
+ client, stuff->gc, XRT_GC, DixReadAccess)))
+ return BadGC;
+
+ isRoot = (draw->type == XRT_WINDOW) && draw->u.win.root;
+
+ orig_x = stuff->dstX;
+ orig_y = stuff->dstY;
+ sendEvent = stuff->sendEvent;
+ stuff->sendEvent = 0;
+ FOR_NSCREENS(j) {
+ if(!j) stuff->sendEvent = sendEvent;
+ stuff->drawable = draw->info[j].id;
+ stuff->gc = gc->info[j].id;
+ if (isRoot) {
+ stuff->dstX = orig_x - panoramiXdataPtr[j].x;
+ stuff->dstY = orig_y - panoramiXdataPtr[j].y;
+ }
+ result = ProcShmPutImage(client);
+ if(result != client->noClientException) break;
+ }
+ return(result);
+}
+
+static int
+ProcPanoramiXShmGetImage(ClientPtr client)
+{
+ PanoramiXRes *draw;
+ DrawablePtr drawables[MAXSCREENS];
+ DrawablePtr pDraw;
+ xShmGetImageReply xgi;
+ ShmDescPtr shmdesc;
+ int i, x, y, w, h, format, rc;
+ Mask plane = 0, planemask;
+ long lenPer = 0, length, widthBytesLine;
+ Bool isRoot;
+
+ REQUEST(xShmGetImageReq);
+
+ REQUEST_SIZE_MATCH(xShmGetImageReq);
+
+ if ((stuff->format != XYPixmap) && (stuff->format != ZPixmap)) {
+ client->errorValue = stuff->format;
+ return(BadValue);
+ }
+
+ if(!(draw = (PanoramiXRes *)SecurityLookupIDByClass(
+ client, stuff->drawable, XRC_DRAWABLE, DixWriteAccess)))
+ return BadDrawable;
+
+ if (draw->type == XRT_PIXMAP)
+ return ProcShmGetImage(client);
+
+ rc = dixLookupDrawable(&pDraw, stuff->drawable, client, 0,
+ DixReadAccess);
+ if (rc != Success)
+ return rc;
+
+ VERIFY_SHMPTR(stuff->shmseg, stuff->offset, TRUE, shmdesc, client);
+
+ x = stuff->x;
+ y = stuff->y;
+ w = stuff->width;
+ h = stuff->height;
+ format = stuff->format;
+ planemask = stuff->planeMask;
+
+ isRoot = (draw->type == XRT_WINDOW) && draw->u.win.root;
+
+ if(isRoot) {
+ if( /* check for being onscreen */
+ x < 0 || x + w > PanoramiXPixWidth ||
+ y < 0 || y + h > PanoramiXPixHeight )
+ return(BadMatch);
+ } else {
+ if( /* check for being onscreen */
+ panoramiXdataPtr[0].x + pDraw->x + x < 0 ||
+ panoramiXdataPtr[0].x + pDraw->x + x + w > PanoramiXPixWidth ||
+ panoramiXdataPtr[0].y + pDraw->y + y < 0 ||
+ panoramiXdataPtr[0].y + pDraw->y + y + h > PanoramiXPixHeight ||
+ /* check for being inside of border */
+ x < - wBorderWidth((WindowPtr)pDraw) ||
+ x + w > wBorderWidth((WindowPtr)pDraw) + (int)pDraw->width ||
+ y < -wBorderWidth((WindowPtr)pDraw) ||
+ y + h > wBorderWidth ((WindowPtr)pDraw) + (int)pDraw->height)
+ return(BadMatch);
+ }
+
+ drawables[0] = pDraw;
+ for(i = 1; i < PanoramiXNumScreens; i++) {
+ rc = dixLookupDrawable(drawables+i, draw->info[i].id, client, 0,
+ DixReadAccess);
+ if (rc != Success)
+ return rc;
+ }
+
+ xgi.visual = wVisual(((WindowPtr)pDraw));
+ xgi.type = X_Reply;
+ xgi.length = 0;
+ xgi.sequenceNumber = client->sequence;
+ xgi.depth = pDraw->depth;
+
+ if(format == ZPixmap) {
+ widthBytesLine = PixmapBytePad(w, pDraw->depth);
+ length = widthBytesLine * h;
+ } else {
+ widthBytesLine = PixmapBytePad(w, 1);
+ lenPer = widthBytesLine * h;
+ plane = ((Mask)1) << (pDraw->depth - 1);
+ length = lenPer * Ones(planemask & (plane | (plane - 1)));
+ }
+
+ VERIFY_SHMSIZE(shmdesc, stuff->offset, length, client);
+ xgi.size = length;
+
+ if (length == 0) {/* nothing to do */ }
+ else if (format == ZPixmap) {
+ XineramaGetImageData(drawables, x, y, w, h, format, planemask,
+ shmdesc->addr + stuff->offset,
+ widthBytesLine, isRoot);
+ } else {
+
+ length = stuff->offset;
+ for (; plane; plane >>= 1) {
+ if (planemask & plane) {
+ XineramaGetImageData(drawables, x, y, w, h,
+ format, plane, shmdesc->addr + length,
+ widthBytesLine, isRoot);
+ length += lenPer;
+ }
+ }
+ }
+
+ if (client->swapped) {
+ register int n;
+ swaps(&xgi.sequenceNumber, n);
+ swapl(&xgi.length, n);
+ swapl(&xgi.visual, n);
+ swapl(&xgi.size, n);
+ }
+ WriteToClient(client, sizeof(xShmGetImageReply), (char *)&xgi);
+
+ return(client->noClientException);
+}
+
+static int
+ProcPanoramiXShmCreatePixmap(
+ register ClientPtr client)
+{
+ ScreenPtr pScreen = NULL;
+ PixmapPtr pMap = NULL;
+ DrawablePtr pDraw;
+ DepthPtr pDepth;
+ int i, j, result, rc;
+ ShmDescPtr shmdesc;
+ REQUEST(xShmCreatePixmapReq);
+ unsigned int width, height, depth;
+ unsigned long size;
+ PanoramiXRes *newPix;
+
+ REQUEST_SIZE_MATCH(xShmCreatePixmapReq);
+ client->errorValue = stuff->pid;
+ if (!sharedPixmaps)
+ return BadImplementation;
+ LEGAL_NEW_RESOURCE(stuff->pid, client);
+ rc = dixLookupDrawable(&pDraw, stuff->drawable, client, M_ANY,
+ DixGetAttrAccess);
+ if (rc != Success)
+ return rc;
+
+ VERIFY_SHMPTR(stuff->shmseg, stuff->offset, TRUE, shmdesc, client);
+
+ width = stuff->width;
+ height = stuff->height;
+ depth = stuff->depth;
+ if (!width || !height || !depth)
+ {
+ client->errorValue = 0;
+ return BadValue;
+ }
+ if (width > 32767 || height > 32767)
+ return BadAlloc;
+
+ if (stuff->depth != 1)
+ {
+ pDepth = pDraw->pScreen->allowedDepths;
+ for (i=0; i<pDraw->pScreen->numDepths; i++, pDepth++)
+ if (pDepth->depth == stuff->depth)
+ goto CreatePmap;
+ client->errorValue = stuff->depth;
+ return BadValue;
+ }
+
+CreatePmap:
+ size = PixmapBytePad(width, depth) * height;
+ if (sizeof(size) == 4 && BitsPerPixel(depth) > 8) {
+ if (size < width * height)
+ return BadAlloc;
+ }
+ /* thankfully, offset is unsigned */
+ if (stuff->offset + size < size)
+ return BadAlloc;
+
+ VERIFY_SHMSIZE(shmdesc, stuff->offset, size, client);
+
+ if(!(newPix = (PanoramiXRes *) xalloc(sizeof(PanoramiXRes))))
+ return BadAlloc;
+
+ newPix->type = XRT_PIXMAP;
+ newPix->u.pix.shared = TRUE;
+ newPix->info[0].id = stuff->pid;
+ for(j = 1; j < PanoramiXNumScreens; j++)
+ newPix->info[j].id = FakeClientID(client->index);
+
+ result = (client->noClientException);
+
+ FOR_NSCREENS(j) {
+ pScreen = screenInfo.screens[j];
+
+ pMap = (*shmFuncs[j]->CreatePixmap)(pScreen,
+ stuff->width, stuff->height, stuff->depth,
+ shmdesc->addr + stuff->offset);
+
+ if (pMap) {
+ dixSetPrivate(&pMap->devPrivates, shmPixmapPrivate, shmdesc);
+ shmdesc->refcnt++;
+ pMap->drawable.serialNumber = NEXT_SERIAL_NUMBER;
+ pMap->drawable.id = newPix->info[j].id;
+ if (!AddResource(newPix->info[j].id, RT_PIXMAP, (pointer)pMap)) {
+ (*pScreen->DestroyPixmap)(pMap);
+ result = BadAlloc;
+ break;
+ }
+ } else {
+ result = BadAlloc;
+ break;
+ }
+ }
+
+ if(result == BadAlloc) {
+ while(j--) {
+ (*pScreen->DestroyPixmap)(pMap);
+ FreeResource(newPix->info[j].id, RT_NONE);
+ }
+ xfree(newPix);
+ } else
+ AddResource(stuff->pid, XRT_PIXMAP, newPix);
+
+ return result;
+}
+
+#endif
+
+static int
+ProcShmPutImage(client)
+ register ClientPtr client;
+{
+ GCPtr pGC;
+ DrawablePtr pDraw;
+ long length;
+ ShmDescPtr shmdesc;
+ REQUEST(xShmPutImageReq);
+
+ REQUEST_SIZE_MATCH(xShmPutImageReq);
+ VALIDATE_DRAWABLE_AND_GC(stuff->drawable, pDraw, DixWriteAccess);
+ VERIFY_SHMPTR(stuff->shmseg, stuff->offset, FALSE, shmdesc, client);
+ if ((stuff->sendEvent != xTrue) && (stuff->sendEvent != xFalse))
+ return BadValue;
+ if (stuff->format == XYBitmap)
+ {
+ if (stuff->depth != 1)
+ return BadMatch;
+ length = PixmapBytePad(stuff->totalWidth, 1);
+ }
+ else if (stuff->format == XYPixmap)
+ {
+ if (pDraw->depth != stuff->depth)
+ return BadMatch;
+ length = PixmapBytePad(stuff->totalWidth, 1);
+ length *= stuff->depth;
+ }
+ else if (stuff->format == ZPixmap)
+ {
+ if (pDraw->depth != stuff->depth)
+ return BadMatch;
+ length = PixmapBytePad(stuff->totalWidth, stuff->depth);
+ }
+ else
+ {
+ client->errorValue = stuff->format;
+ return BadValue;
+ }
+
+ /*
+ * There's a potential integer overflow in this check:
+ * VERIFY_SHMSIZE(shmdesc, stuff->offset, length * stuff->totalHeight,
+ * client);
+ * the version below ought to avoid it
+ */
+ if (stuff->totalHeight != 0 &&
+ length > (shmdesc->size - stuff->offset)/stuff->totalHeight) {
+ client->errorValue = stuff->totalWidth;
+ return BadValue;
+ }
+ if (stuff->srcX > stuff->totalWidth)
+ {
+ client->errorValue = stuff->srcX;
+ return BadValue;
+ }
+ if (stuff->srcY > stuff->totalHeight)
+ {
+ client->errorValue = stuff->srcY;
+ return BadValue;
+ }
+ if ((stuff->srcX + stuff->srcWidth) > stuff->totalWidth)
+ {
+ client->errorValue = stuff->srcWidth;
+ return BadValue;
+ }
+ if ((stuff->srcY + stuff->srcHeight) > stuff->totalHeight)
+ {
+ client->errorValue = stuff->srcHeight;
+ return BadValue;
+ }
+
+ if ((((stuff->format == ZPixmap) && (stuff->srcX == 0)) ||
+ ((stuff->format != ZPixmap) &&
+ (stuff->srcX < screenInfo.bitmapScanlinePad) &&
+ ((stuff->format == XYBitmap) ||
+ ((stuff->srcY == 0) &&
+ (stuff->srcHeight == stuff->totalHeight))))) &&
+ ((stuff->srcX + stuff->srcWidth) == stuff->totalWidth))
+ (*pGC->ops->PutImage) (pDraw, pGC, stuff->depth,
+ stuff->dstX, stuff->dstY,
+ stuff->totalWidth, stuff->srcHeight,
+ stuff->srcX, stuff->format,
+ shmdesc->addr + stuff->offset +
+ (stuff->srcY * length));
+ else
+ doShmPutImage(pDraw, pGC, stuff->depth, stuff->format,
+ stuff->totalWidth, stuff->totalHeight,
+ stuff->srcX, stuff->srcY,
+ stuff->srcWidth, stuff->srcHeight,
+ stuff->dstX, stuff->dstY,
+ shmdesc->addr + stuff->offset);
+
+ if (stuff->sendEvent)
+ {
+ xShmCompletionEvent ev;
+
+ ev.type = ShmCompletionCode;
+ ev.drawable = stuff->drawable;
+ ev.sequenceNumber = client->sequence;
+ ev.minorEvent = X_ShmPutImage;
+ ev.majorEvent = ShmReqCode;
+ ev.shmseg = stuff->shmseg;
+ ev.offset = stuff->offset;
+ WriteEventsToClient(client, 1, (xEvent *) &ev);
+ }
+
+ return (client->noClientException);
+}
+
+
+
+static int
+ProcShmGetImage(client)
+ register ClientPtr client;
+{
+ DrawablePtr pDraw;
+ long lenPer = 0, length;
+ Mask plane = 0;
+ xShmGetImageReply xgi;
+ ShmDescPtr shmdesc;
+ int n, rc;
+
+ REQUEST(xShmGetImageReq);
+
+ REQUEST_SIZE_MATCH(xShmGetImageReq);
+ if ((stuff->format != XYPixmap) && (stuff->format != ZPixmap))
+ {
+ client->errorValue = stuff->format;
+ return(BadValue);
+ }
+ rc = dixLookupDrawable(&pDraw, stuff->drawable, client, 0,
+ DixReadAccess);
+ if (rc != Success)
+ return rc;
+ VERIFY_SHMPTR(stuff->shmseg, stuff->offset, TRUE, shmdesc, client);
+ if (pDraw->type == DRAWABLE_WINDOW)
+ {
+ if( /* check for being viewable */
+ !((WindowPtr) pDraw)->realized ||
+ /* check for being on screen */
+ pDraw->x + stuff->x < 0 ||
+ pDraw->x + stuff->x + (int)stuff->width > pDraw->pScreen->width ||
+ pDraw->y + stuff->y < 0 ||
+ pDraw->y + stuff->y + (int)stuff->height > pDraw->pScreen->height ||
+ /* check for being inside of border */
+ stuff->x < - wBorderWidth((WindowPtr)pDraw) ||
+ stuff->x + (int)stuff->width >
+ wBorderWidth((WindowPtr)pDraw) + (int)pDraw->width ||
+ stuff->y < -wBorderWidth((WindowPtr)pDraw) ||
+ stuff->y + (int)stuff->height >
+ wBorderWidth((WindowPtr)pDraw) + (int)pDraw->height
+ )
+ return(BadMatch);
+ xgi.visual = wVisual(((WindowPtr)pDraw));
+ }
+ else
+ {
+ if (stuff->x < 0 ||
+ stuff->x+(int)stuff->width > pDraw->width ||
+ stuff->y < 0 ||
+ stuff->y+(int)stuff->height > pDraw->height
+ )
+ return(BadMatch);
+ xgi.visual = None;
+ }
+ xgi.type = X_Reply;
+ xgi.length = 0;
+ xgi.sequenceNumber = client->sequence;
+ xgi.depth = pDraw->depth;
+ if(stuff->format == ZPixmap)
+ {
+ length = PixmapBytePad(stuff->width, pDraw->depth) * stuff->height;
+ }
+ else
+ {
+ lenPer = PixmapBytePad(stuff->width, 1) * stuff->height;
+ plane = ((Mask)1) << (pDraw->depth - 1);
+ /* only planes asked for */
+ length = lenPer * Ones(stuff->planeMask & (plane | (plane - 1)));
+ }
+
+ VERIFY_SHMSIZE(shmdesc, stuff->offset, length, client);
+ xgi.size = length;
+
+ if (length == 0)
+ {
+ /* nothing to do */
+ }
+ else if (stuff->format == ZPixmap)
+ {
+ (*pDraw->pScreen->GetImage)(pDraw, stuff->x, stuff->y,
+ stuff->width, stuff->height,
+ stuff->format, stuff->planeMask,
+ shmdesc->addr + stuff->offset);
+ }
+ else
+ {
+
+ length = stuff->offset;
+ for (; plane; plane >>= 1)
+ {
+ if (stuff->planeMask & plane)
+ {
+ (*pDraw->pScreen->GetImage)(pDraw,
+ stuff->x, stuff->y,
+ stuff->width, stuff->height,
+ stuff->format, plane,
+ shmdesc->addr + length);
+ length += lenPer;
+ }
+ }
+ }
+
+ if (client->swapped) {
+ swaps(&xgi.sequenceNumber, n);
+ swapl(&xgi.length, n);
+ swapl(&xgi.visual, n);
+ swapl(&xgi.size, n);
+ }
+ WriteToClient(client, sizeof(xShmGetImageReply), (char *)&xgi);
+
+ return(client->noClientException);
+}
+
+static PixmapPtr
+fbShmCreatePixmap (pScreen, width, height, depth, addr)
+ ScreenPtr pScreen;
+ int width;
+ int height;
+ int depth;
+ char *addr;
+{
+ register PixmapPtr pPixmap;
+
+ pPixmap = (*pScreen->CreatePixmap)(pScreen, 0, 0, pScreen->rootDepth, 0);
+ if (!pPixmap)
+ return NullPixmap;
+
+ if (!(*pScreen->ModifyPixmapHeader)(pPixmap, width, height, depth,
+ BitsPerPixel(depth), PixmapBytePad(width, depth), (pointer)addr)) {
+ (*pScreen->DestroyPixmap)(pPixmap);
+ return NullPixmap;
+ }
+ return pPixmap;
+}
+
+static int
+ProcShmCreatePixmap(client)
+ register ClientPtr client;
+{
+ PixmapPtr pMap;
+ DrawablePtr pDraw;
+ DepthPtr pDepth;
+ register int i, rc;
+ ShmDescPtr shmdesc;
+ REQUEST(xShmCreatePixmapReq);
+ unsigned int width, height, depth;
+ unsigned long size;
+
+ REQUEST_SIZE_MATCH(xShmCreatePixmapReq);
+ client->errorValue = stuff->pid;
+ if (!sharedPixmaps)
+ return BadImplementation;
+ LEGAL_NEW_RESOURCE(stuff->pid, client);
+ rc = dixLookupDrawable(&pDraw, stuff->drawable, client, M_ANY,
+ DixGetAttrAccess);
+ if (rc != Success)
+ return rc;
+
+ VERIFY_SHMPTR(stuff->shmseg, stuff->offset, TRUE, shmdesc, client);
+
+ width = stuff->width;
+ height = stuff->height;
+ depth = stuff->depth;
+ if (!width || !height || !depth)
+ {
+ client->errorValue = 0;
+ return BadValue;
+ }
+ if (width > 32767 || height > 32767)
+ return BadAlloc;
+
+ if (stuff->depth != 1)
+ {
+ pDepth = pDraw->pScreen->allowedDepths;
+ for (i=0; i<pDraw->pScreen->numDepths; i++, pDepth++)
+ if (pDepth->depth == stuff->depth)
+ goto CreatePmap;
+ client->errorValue = stuff->depth;
+ return BadValue;
+ }
+
+CreatePmap:
+ size = PixmapBytePad(width, depth) * height;
+ if (sizeof(size) == 4 && BitsPerPixel(depth) > 8) {
+ if (size < width * height)
+ return BadAlloc;
+ }
+ /* thankfully, offset is unsigned */
+ if (stuff->offset + size < size)
+ return BadAlloc;
+
+ VERIFY_SHMSIZE(shmdesc, stuff->offset, size, client);
+ pMap = (*shmFuncs[pDraw->pScreen->myNum]->CreatePixmap)(
+ pDraw->pScreen, stuff->width,
+ stuff->height, stuff->depth,
+ shmdesc->addr + stuff->offset);
+ if (pMap)
+ {
+ rc = XaceHook(XACE_RESOURCE_ACCESS, client, stuff->pid, RT_PIXMAP,
+ pMap, RT_NONE, NULL, DixCreateAccess);
+ if (rc != Success) {
+ pDraw->pScreen->DestroyPixmap(pMap);
+ return rc;
+ }
+ dixSetPrivate(&pMap->devPrivates, shmPixmapPrivate, shmdesc);
+ shmdesc->refcnt++;
+ pMap->drawable.serialNumber = NEXT_SERIAL_NUMBER;
+ pMap->drawable.id = stuff->pid;
+ if (AddResource(stuff->pid, RT_PIXMAP, (pointer)pMap))
+ {
+ return(client->noClientException);
+ }
+ pDraw->pScreen->DestroyPixmap(pMap);
+ }
+ return (BadAlloc);
+}
+
+static int
+ProcShmDispatch (client)
+ register ClientPtr client;
+{
+ REQUEST(xReq);
+ switch (stuff->data)
+ {
+ case X_ShmQueryVersion:
+ return ProcShmQueryVersion(client);
+ case X_ShmAttach:
+ return ProcShmAttach(client);
+ case X_ShmDetach:
+ return ProcShmDetach(client);
+ case X_ShmPutImage:
+#ifdef PANORAMIX
+ if ( !noPanoramiXExtension )
+ return ProcPanoramiXShmPutImage(client);
+#endif
+ return ProcShmPutImage(client);
+ case X_ShmGetImage:
+#ifdef PANORAMIX
+ if ( !noPanoramiXExtension )
+ return ProcPanoramiXShmGetImage(client);
+#endif
+ return ProcShmGetImage(client);
+ case X_ShmCreatePixmap:
+#ifdef PANORAMIX
+ if ( !noPanoramiXExtension )
+ return ProcPanoramiXShmCreatePixmap(client);
+#endif
+ return ProcShmCreatePixmap(client);
+ default:
+ return BadRequest;
+ }
+}
+
+static void
+SShmCompletionEvent(from, to)
+ xShmCompletionEvent *from, *to;
+{
+ to->type = from->type;
+ cpswaps(from->sequenceNumber, to->sequenceNumber);
+ cpswapl(from->drawable, to->drawable);
+ cpswaps(from->minorEvent, to->minorEvent);
+ to->majorEvent = from->majorEvent;
+ cpswapl(from->shmseg, to->shmseg);
+ cpswapl(from->offset, to->offset);
+}
+
+static int
+SProcShmQueryVersion(client)
+ register ClientPtr client;
+{
+ register int n;
+ REQUEST(xShmQueryVersionReq);
+
+ swaps(&stuff->length, n);
+ return ProcShmQueryVersion(client);
+}
+
+static int
+SProcShmAttach(client)
+ ClientPtr client;
+{
+ register int n;
+ REQUEST(xShmAttachReq);
+ swaps(&stuff->length, n);
+ REQUEST_SIZE_MATCH(xShmAttachReq);
+ swapl(&stuff->shmseg, n);
+ swapl(&stuff->shmid, n);
+ return ProcShmAttach(client);
+}
+
+static int
+SProcShmDetach(client)
+ ClientPtr client;
+{
+ register int n;
+ REQUEST(xShmDetachReq);
+ swaps(&stuff->length, n);
+ REQUEST_SIZE_MATCH(xShmDetachReq);
+ swapl(&stuff->shmseg, n);
+ return ProcShmDetach(client);
+}
+
+static int
+SProcShmPutImage(client)
+ ClientPtr client;
+{
+ register int n;
+ REQUEST(xShmPutImageReq);
+ swaps(&stuff->length, n);
+ REQUEST_SIZE_MATCH(xShmPutImageReq);
+ swapl(&stuff->drawable, n);
+ swapl(&stuff->gc, n);
+ swaps(&stuff->totalWidth, n);
+ swaps(&stuff->totalHeight, n);
+ swaps(&stuff->srcX, n);
+ swaps(&stuff->srcY, n);
+ swaps(&stuff->srcWidth, n);
+ swaps(&stuff->srcHeight, n);
+ swaps(&stuff->dstX, n);
+ swaps(&stuff->dstY, n);
+ swapl(&stuff->shmseg, n);
+ swapl(&stuff->offset, n);
+ return ProcShmPutImage(client);
+}
+
+static int
+SProcShmGetImage(client)
+ ClientPtr client;
+{
+ register int n;
+ REQUEST(xShmGetImageReq);
+ swaps(&stuff->length, n);
+ REQUEST_SIZE_MATCH(xShmGetImageReq);
+ swapl(&stuff->drawable, n);
+ swaps(&stuff->x, n);
+ swaps(&stuff->y, n);
+ swaps(&stuff->width, n);
+ swaps(&stuff->height, n);
+ swapl(&stuff->planeMask, n);
+ swapl(&stuff->shmseg, n);
+ swapl(&stuff->offset, n);
+ return ProcShmGetImage(client);
+}
+
+static int
+SProcShmCreatePixmap(client)
+ ClientPtr client;
+{
+ register int n;
+ REQUEST(xShmCreatePixmapReq);
+ swaps(&stuff->length, n);
+ REQUEST_SIZE_MATCH(xShmCreatePixmapReq);
+ swapl(&stuff->pid, n);
+ swapl(&stuff->drawable, n);
+ swaps(&stuff->width, n);
+ swaps(&stuff->height, n);
+ swapl(&stuff->shmseg, n);
+ swapl(&stuff->offset, n);
+ return ProcShmCreatePixmap(client);
+}
+
+static int
+SProcShmDispatch (client)
+ register ClientPtr client;
+{
+ REQUEST(xReq);
+ switch (stuff->data)
+ {
+ case X_ShmQueryVersion:
+ return SProcShmQueryVersion(client);
+ case X_ShmAttach:
+ return SProcShmAttach(client);
+ case X_ShmDetach:
+ return SProcShmDetach(client);
+ case X_ShmPutImage:
+ return SProcShmPutImage(client);
+ case X_ShmGetImage:
+ return SProcShmGetImage(client);
+ case X_ShmCreatePixmap:
+ return SProcShmCreatePixmap(client);
+ default:
+ return BadRequest;
+ }
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-20 05:59:41 +0000