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-rw-r--r--Xext/shm.c1010
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diff --git a/Xext/shm.c b/Xext/shm.c
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index 000000000..0a9f3af59
--- /dev/null
+++ b/Xext/shm.c
@@ -0,0 +1,1010 @@
+/************************************************************
+
+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 */
+
+/* $Xorg: shm.c,v 1.4 2001/02/09 02:04:33 xorgcvs Exp $ */
+
+#include <sys/types.h>
+#include <sys/ipc.h>
+#include <sys/shm.h>
+#define NEED_REPLIES
+#define NEED_EVENTS
+#include "X.h"
+#include "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"
+#define _XSHM_SERVER_
+#include "shmstr.h"
+#include "Xfuncproto.h"
+
+typedef struct _ShmDesc {
+ struct _ShmDesc *next;
+ int shmid;
+ int refcnt;
+ char *addr;
+ Bool writable;
+ unsigned long size;
+} ShmDescRec, *ShmDescPtr;
+
+static void miShmPutImage(), fbShmPutImage();
+static PixmapPtr fbShmCreatePixmap();
+static int ProcShmDispatch(), SProcShmDispatch();
+static int ShmDetachSegment();
+static void ShmResetProc(), SShmCompletionEvent();
+
+static unsigned char ShmReqCode;
+static int ShmCompletionCode;
+static int BadShmSegCode;
+static RESTYPE ShmSegType, ShmPixType;
+static ShmDescPtr Shmsegs;
+static Bool sharedPixmaps;
+static int pixmapFormat;
+static int shmPixFormat[MAXSCREENS];
+static ShmFuncsPtr shmFuncs[MAXSCREENS];
+static ShmFuncs miFuncs = {NULL, miShmPutImage};
+static ShmFuncs fbFuncs = {fbShmCreatePixmap, fbShmPutImage};
+
+#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; \
+ } \
+}
+
+void
+ShmExtensionInit()
+{
+ ExtensionEntry *extEntry;
+ int i;
+
+#ifdef INTERNAL_VS_EXTERNAL_PADDING
+ sharedPixmaps = xFalse;
+ pixmapFormat = 0;
+#else
+ 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;
+#endif
+ ShmSegType = CreateNewResourceType(ShmDetachSegment);
+ ShmPixType = CreateNewResourceType(ShmDetachSegment);
+ if (ShmSegType && ShmPixType &&
+ (extEntry = AddExtension(SHMNAME, ShmNumberEvents, ShmNumberErrors,
+ ProcShmDispatch, SProcShmDispatch,
+ ShmResetProc, StandardMinorOpcode)))
+ {
+ ShmReqCode = (unsigned char)extEntry->base;
+ ShmCompletionCode = extEntry->eventBase;
+ BadShmSegCode = extEntry->errorBase;
+ EventSwapVector[ShmCompletionCode] = 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(pScreen, funcs)
+ ScreenPtr pScreen;
+ ShmFuncsPtr funcs;
+{
+ shmFuncs[pScreen->myNum] = funcs;
+}
+
+void
+ShmSetPixmapFormat(pScreen, format)
+ ScreenPtr pScreen;
+ int format;
+{
+ shmPixFormat[pScreen->myNum] = format;
+}
+
+void
+ShmRegisterFbFuncs(pScreen)
+ ScreenPtr pScreen;
+{
+ shmFuncs[pScreen->myNum] = &fbFuncs;
+}
+
+static int
+ProcShmQueryVersion(client)
+ register ClientPtr client;
+{
+ REQUEST(xShmQueryVersionReq);
+ 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);
+}
+
+static int
+ProcShmAttach(client)
+ register ClientPtr client;
+{
+ struct shmid_ds 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)) ||
+ shmctl(stuff->shmid, IPC_STAT, &buf))
+ {
+ xfree(shmdesc);
+ return BadAccess;
+ }
+ shmdesc->shmid = stuff->shmid;
+ shmdesc->refcnt = 1;
+ shmdesc->writable = !stuff->readOnly;
+ shmdesc->size = buf.shm_segsz;
+ 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);
+}
+
+static void
+miShmPutImage(dst, pGC, depth, format, w, h, sx, sy, sw, sh, dx, dy, data)
+ DrawablePtr dst;
+ GCPtr pGC;
+ int depth, w, h, sx, sy, sw, sh, dx, dy;
+ unsigned int format;
+ char *data;
+{
+ PixmapPtr pmap;
+ GCPtr putGC;
+
+ putGC = GetScratchGC(depth, dst->pScreen);
+ if (!putGC)
+ return;
+ pmap = (*dst->pScreen->CreatePixmap)(dst->pScreen, sw, sh, depth);
+ if (!pmap)
+ {
+ FreeScratchGC(putGC);
+ return;
+ }
+ ValidateGC((DrawablePtr)pmap, putGC);
+ (*putGC->ops->PutImage)((DrawablePtr)pmap, putGC, depth, -sx, -sy, w, h, 0,
+ (format == XYPixmap) ? XYPixmap : ZPixmap, data);
+ FreeScratchGC(putGC);
+ if (format == XYBitmap)
+ (void)(*pGC->ops->CopyPlane)((DrawablePtr)pmap, dst, pGC, 0, 0, sw, sh,
+ dx, dy, 1L);
+ else
+ (void)(*pGC->ops->CopyArea)((DrawablePtr)pmap, dst, pGC, 0, 0, sw, sh,
+ dx, dy);
+ (*pmap->drawable.pScreen->DestroyPixmap)(pmap);
+}
+
+static void
+fbShmPutImage(dst, pGC, depth, format, w, h, sx, sy, sw, sh, dx, dy, data)
+ DrawablePtr dst;
+ GCPtr pGC;
+ int depth, w, h, sx, sy, sw, sh, dx, dy;
+ unsigned int format;
+ char *data;
+{
+ if ((format == ZPixmap) || (depth == 1))
+ {
+ PixmapPtr pPixmap;
+
+ pPixmap = GetScratchPixmapHeader(dst->pScreen, w, h, depth,
+ /*XXX*/depth, PixmapBytePad(w, depth), (pointer)data);
+ if (!pPixmap)
+ return;
+ if (format == XYBitmap)
+ (void)(*pGC->ops->CopyPlane)((DrawablePtr)pPixmap, dst, pGC,
+ sx, sy, sw, sh, dx, dy, 1L);
+ else
+ (void)(*pGC->ops->CopyArea)((DrawablePtr)pPixmap, dst, pGC,
+ sx, sy, sw, sh, dx, dy);
+ FreeScratchPixmapHeader(pPixmap);
+ }
+ else
+ miShmPutImage(dst, pGC, depth, format, w, h, sx, sy, sw, sh, dx, dy,
+ data);
+}
+
+static int
+ProcShmPutImage(client)
+ register ClientPtr client;
+{
+ register GCPtr pGC;
+ register DrawablePtr pDraw;
+ long length;
+#ifdef INTERNAL_VS_EXTERNAL_PADDING
+ long lengthProto;
+ char *tmpImage;
+ int tmpAlloced = 0;
+#endif
+ ShmDescPtr shmdesc;
+ REQUEST(xShmPutImageReq);
+
+ REQUEST_SIZE_MATCH(xShmPutImageReq);
+ VALIDATE_DRAWABLE_AND_GC(stuff->drawable, pDraw, pGC, client);
+ 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);
+#ifdef INTERNAL_VS_EXTERNAL_PADDING
+ lengthProto = PixmapBytePadProto(stuff->totalWidth, 1);
+#endif
+ }
+ else if (stuff->format == XYPixmap)
+ {
+ if (pDraw->depth != stuff->depth)
+ return BadMatch;
+ length = PixmapBytePad(stuff->totalWidth, 1);
+ length *= stuff->depth;
+#ifdef INTERNAL_VS_EXTERNAL_PADDING
+ lengthProto = PixmapBytePadProto(stuff->totalWidth, 1);
+ lengthProto *= stuff->depth;
+#endif
+ }
+ else if (stuff->format == ZPixmap)
+ {
+ if (pDraw->depth != stuff->depth)
+ return BadMatch;
+ length = PixmapBytePad(stuff->totalWidth, stuff->depth);
+#ifdef INTERNAL_VS_EXTERNAL_PADDING
+ lengthProto = PixmapBytePadProto(stuff->totalWidth, stuff->depth);
+#endif
+ }
+ else
+ {
+ client->errorValue = stuff->format;
+ return BadValue;
+ }
+
+#ifdef INTERNAL_VS_EXTERNAL_PADDING
+ VERIFY_SHMSIZE(shmdesc, stuff->offset, lengthProto * stuff->totalHeight,
+ client);
+#else
+ VERIFY_SHMSIZE(shmdesc, stuff->offset, length * stuff->totalHeight,
+ client);
+#endif
+ 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;
+ }
+
+#ifdef INTERNAL_VS_EXTERNAL_PADDING
+ /* handle 64 bit case where protocol may pad to 32 and we want 64
+ * In this case, length is what the server wants and lengthProto is
+ * what the protocol thinks it is. If the the two are different,
+ * copy the protocol version (i.e. the memory shared between the
+ * server and the client) to a version with a scanline pad of 64.
+ */
+ if (length != lengthProto)
+ {
+ register int i;
+ char * stuffptr, /* pointer into protocol data */
+ * tmpptr; /* new location to copy to */
+
+ if(!(tmpImage = (char *) ALLOCATE_LOCAL(length*stuff->totalHeight)))
+ return (BadAlloc);
+ tmpAlloced = 1;
+
+ bzero(tmpImage,length*stuff->totalHeight);
+
+ if (stuff->format == XYPixmap)
+ {
+ int lineBytes = PixmapBytePad(stuff->totalWidth, 1);
+ int lineBytesProto = PixmapBytePadProto(stuff->totalWidth, 1);
+ int depth = stuff->depth;
+
+ stuffptr = shmdesc->addr + stuff->offset ;
+ tmpptr = tmpImage;
+ for (i = 0; i < stuff->totalHeight*stuff->depth;
+ stuffptr += lineBytesProto,tmpptr += lineBytes, i++)
+ bcopy(stuffptr,tmpptr,lineBytesProto);
+ }
+ else
+ {
+ for (i = 0,
+ stuffptr = shmdesc->addr + stuff->offset,
+ tmpptr=tmpImage;
+ i < stuff->totalHeight;
+ stuffptr += lengthProto,tmpptr += length, i++)
+ bcopy(stuffptr,tmpptr,lengthProto);
+ }
+ }
+ /* handle 64-bit case where stuff is not 64-bit aligned
+ */
+ else if ((unsigned long)(shmdesc->addr+stuff->offset) &
+ (sizeof(long)-1))
+ {
+ if(!(tmpImage = (char *) ALLOCATE_LOCAL(length*stuff->totalHeight)))
+ return (BadAlloc);
+ tmpAlloced = 1;
+ bcopy((char *)(shmdesc->addr+stuff->offset),
+ tmpImage,
+ length*stuff->totalHeight);
+ }
+ else
+ tmpImage = (char *)(shmdesc->addr+stuff->offset);
+#endif
+
+ 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,
+#ifdef INTERNAL_VS_EXTERNAL_PADDING
+ tmpImage +
+#else
+ shmdesc->addr + stuff->offset +
+#endif
+ (stuff->srcY * length));
+ else
+ (*shmFuncs[pDraw->pScreen->myNum]->PutImage)(
+ pDraw, pGC, stuff->depth, stuff->format,
+ stuff->totalWidth, stuff->totalHeight,
+ stuff->srcX, stuff->srcY,
+ stuff->srcWidth, stuff->srcHeight,
+ stuff->dstX, stuff->dstY,
+#ifdef INTERNAL_VS_EXTERNAL_PADDING
+ tmpImage);
+
+#else
+ shmdesc->addr + stuff->offset);
+#endif
+
+ 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);
+ }
+
+#ifdef INTERNAL_VS_EXTERNAL_PADDING
+ if (tmpAlloced)
+ DEALLOCATE_LOCAL(tmpImage);
+#endif
+
+ return (client->noClientException);
+}
+
+
+
+static int
+ProcShmGetImage(client)
+ register ClientPtr client;
+{
+ register DrawablePtr pDraw;
+ long lenPer, length;
+ Mask plane;
+ xShmGetImageReply xgi;
+ ShmDescPtr shmdesc;
+ int n;
+#ifdef INTERNAL_VS_EXTERNAL_PADDING
+ long widthBytesLine,widthBytesLineProto;
+ long lenPerProto,lengthProto;
+ char *tmpImage;
+ int tmpAlloced = 0;
+#endif
+
+ REQUEST(xShmGetImageReq);
+
+ REQUEST_SIZE_MATCH(xShmGetImageReq);
+ if ((stuff->format != XYPixmap) && (stuff->format != ZPixmap))
+ {
+ client->errorValue = stuff->format;
+ return(BadValue);
+ }
+ VERIFY_DRAWABLE(pDraw, stuff->drawable, client);
+ 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)
+ {
+#ifdef INTERNAL_VS_EXTERNAL_PADDING
+ widthBytesLine = PixmapBytePad(stuff->width, pDraw->depth);
+ length = widthBytesLine * stuff->height;
+ widthBytesLineProto = PixmapBytePadProto(stuff->width, pDraw->depth);
+ lengthProto = widthBytesLineProto * stuff->height;
+#else
+ length = PixmapBytePad(stuff->width, pDraw->depth) * stuff->height;
+#endif
+ }
+ else
+ {
+#ifdef INTERNAL_VS_EXTERNAL_PADDING
+ widthBytesLine = PixmapBytePad(stuff->width, 1);
+ lenPer = widthBytesLine * stuff->height;
+ plane = ((Mask)1) << (pDraw->depth - 1);
+ /* only planes asked for */
+ length = lenPer * Ones(stuff->planeMask & (plane | (plane - 1)));
+
+ widthBytesLineProto = PixmapBytePadProto(stuff->width, 1);
+ lenPerProto = widthBytesLineProto * stuff->height;
+ lengthProto = lenPerProto * Ones(stuff->planeMask &
+ (plane | (plane - 1)));
+#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)));
+#endif
+ }
+
+#ifdef INTERNAL_VS_EXTERNAL_PADDING
+ VERIFY_SHMSIZE(shmdesc, stuff->offset, lengthProto, client);
+ xgi.size = lengthProto;
+#else
+ VERIFY_SHMSIZE(shmdesc, stuff->offset, length, client);
+ xgi.size = length;
+#endif
+
+ if (length == 0)
+ {
+ /* nothing to do */
+ }
+ else if (stuff->format == ZPixmap)
+ {
+#ifdef INTERNAL_VS_EXTERNAL_PADDING
+ /* check for protocol/server padding differences.
+ */
+ if ((widthBytesLine != widthBytesLineProto) ||
+ ((unsigned long)shmdesc->addr + stuff->offset & (sizeof(long)-1)))
+ {
+ /* temp stuff for 64 bit alignment stuff */
+ register char * bufPtr, * protoPtr;
+ register int i;
+
+ if(!(tmpImage = (char *) ALLOCATE_LOCAL(length)))
+ return (BadAlloc);
+ tmpAlloced = 1;
+
+ (*pDraw->pScreen->GetImage)(pDraw, stuff->x, stuff->y,
+ stuff->width, stuff->height,
+ stuff->format, stuff->planeMask,
+ tmpImage);
+
+ /* for 64-bit server, convert image to pad to 32 bits
+ */
+ bzero(shmdesc->addr + stuff->offset,lengthProto);
+
+ for (i=0,bufPtr=tmpImage,protoPtr=shmdesc->addr + stuff->offset;
+ i < stuff->height;
+ bufPtr += widthBytesLine,protoPtr += widthBytesLineProto,
+ i++)
+ bcopy(bufPtr,protoPtr,widthBytesLineProto);
+ }
+ else
+ {
+ (*pDraw->pScreen->GetImage)(pDraw, stuff->x, stuff->y,
+ stuff->width, stuff->height,
+ stuff->format, stuff->planeMask,
+ shmdesc->addr + stuff->offset);
+ }
+#else
+ (*pDraw->pScreen->GetImage)(pDraw, stuff->x, stuff->y,
+ stuff->width, stuff->height,
+ stuff->format, stuff->planeMask,
+ shmdesc->addr + stuff->offset);
+#endif
+ }
+ else
+ {
+#ifdef INTERNAL_VS_EXTERNAL_PADDING
+ /* check for protocol/server padding differences.
+ */
+ if ((widthBytesLine != widthBytesLineProto) ||
+ ((unsigned long)shmdesc->addr + stuff->offset &
+ (sizeof(long)-1)))
+ {
+ if(!(tmpImage = (char *) ALLOCATE_LOCAL(length)))
+ return (BadAlloc);
+ tmpAlloced = 1;
+ }
+#endif
+
+ length = stuff->offset;
+ for (; plane; plane >>= 1)
+ {
+ if (stuff->planeMask & plane)
+ {
+#ifdef INTERNAL_VS_EXTERNAL_PADDING
+ if ((widthBytesLine != widthBytesLineProto) ||
+ ((unsigned long)shmdesc->addr + stuff->offset &
+ (sizeof(long)-1)))
+ {
+ /* get image for each plane.
+ */
+ (*pDraw->pScreen->GetImage)(pDraw,
+ stuff->x, stuff->y,
+ stuff->width, stuff->height,
+ stuff->format, plane,
+ tmpImage);
+
+ /* for 64-bit server, convert image to pad to 32 bits */
+ bzero(shmdesc->addr+length, widthBytesLine);
+ bcopy(tmpImage, shmdesc->addr+length, widthBytesLineProto);
+ /* increment length */
+ length += lenPerProto;
+ }
+ else /* no diff between protocol and server */
+ {
+ (*pDraw->pScreen->GetImage)(pDraw,
+ stuff->x, stuff->y,
+ stuff->width, stuff->height,
+ stuff->format, plane,
+ shmdesc->addr + length);
+ length += lenPer;
+ }
+#else
+ (*pDraw->pScreen->GetImage)(pDraw,
+ stuff->x, stuff->y,
+ stuff->width, stuff->height,
+ stuff->format, plane,
+ shmdesc->addr + length);
+ length += lenPer;
+#endif
+ }
+ }
+ }
+
+ 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);
+
+#ifdef INTERNAL_VS_EXTERNAL_PADDING
+ if (tmpAlloced)
+ DEALLOCATE_LOCAL(tmpImage);
+#endif
+
+ 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);
+ if (!pPixmap)
+ return NullPixmap;
+
+ if (!(*pScreen->ModifyPixmapHeader)(pPixmap, width, height, depth,
+ /*XXX*/depth, PixmapBytePad(width, depth), (pointer)addr))
+ return NullPixmap;
+ return pPixmap;
+}
+
+static int
+ProcShmCreatePixmap(client)
+ register ClientPtr client;
+{
+ PixmapPtr pMap;
+ register DrawablePtr pDraw;
+ DepthPtr pDepth;
+ register int i;
+ ShmDescPtr shmdesc;
+ REQUEST(xShmCreatePixmapReq);
+
+ REQUEST_SIZE_MATCH(xShmCreatePixmapReq);
+ client->errorValue = stuff->pid;
+ if (!sharedPixmaps)
+ return BadImplementation;
+ LEGAL_NEW_RESOURCE(stuff->pid, client);
+ VERIFY_GEOMETRABLE(pDraw, stuff->drawable, client);
+ VERIFY_SHMPTR(stuff->shmseg, stuff->offset, TRUE, shmdesc, client);
+ if (!stuff->width || !stuff->height)
+ {
+ client->errorValue = 0;
+ return BadValue;
+ }
+ 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:
+ VERIFY_SHMSIZE(shmdesc, stuff->offset,
+ PixmapBytePad(stuff->width, stuff->depth) * stuff->height,
+ client);
+ pMap = (*shmFuncs[pDraw->pScreen->myNum]->CreatePixmap)(
+ pDraw->pScreen, stuff->width,
+ stuff->height, stuff->depth,
+ shmdesc->addr + stuff->offset);
+ if (pMap)
+ {
+ pMap->drawable.serialNumber = NEXT_SERIAL_NUMBER;
+ pMap->drawable.id = stuff->pid;
+ if (AddResource(stuff->pid, RT_PIXMAP, (pointer)pMap))
+ {
+ shmdesc->refcnt++;
+ if (AddResource(stuff->pid, ShmPixType, (pointer)shmdesc))
+ return(client->noClientException);
+ FreeResource(stuff->pid, RT_NONE);
+ }
+ }
+ 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:
+ return ProcShmPutImage(client);
+ case X_ShmGetImage:
+ return ProcShmGetImage(client);
+ case X_ShmCreatePixmap:
+ 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->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;
+ }
+}
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