From 49c7992dfc9c6b8a60baf1afbede4616e0265e7f Mon Sep 17 00:00:00 2001
From: marha <marha@users.sourceforge.net>
Date: Sun, 9 May 2010 21:09:18 +0000
Subject: xserver git update 9/5/2010
---
xorg-server/Xext/xf86bigfont.c | 1528 ++++++++++++++++++++--------------------
1 file changed, 759 insertions(+), 769 deletions(-)
(limited to 'xorg-server/Xext')
diff --git a/xorg-server/Xext/xf86bigfont.c b/xorg-server/Xext/xf86bigfont.c
index a4eb3f659..8e8d460e5 100644
--- a/xorg-server/Xext/xf86bigfont.c
+++ b/xorg-server/Xext/xf86bigfont.c
@@ -1,769 +1,759 @@
-/*
- * BIGFONT extension for sharing font metrics between clients (if possible)
- * and for transmitting font metrics to clients in a compressed form.
- *
- * Copyright (c) 1999-2000 Bruno Haible
- * Copyright (c) 1999-2000 The XFree86 Project, Inc.
- */
-
-/* THIS IS NOT AN X CONSORTIUM STANDARD */
-
-/*
- * Big fonts suffer from the following: All clients that have opened a
- * font can access the complete glyph metrics array (the XFontStruct member
- * `per_char') directly, without going through a macro. Moreover these
- * glyph metrics are ink metrics, i.e. are not redundant even for a
- * fixed-width font. For a Unicode font, the size of this array is 768 KB.
- *
- * Problems: 1. It eats a lot of memory in each client. 2. All this glyph
- * metrics data is piped through the socket when the font is opened.
- *
- * This extension addresses these two problems for local clients, by using
- * shared memory. It also addresses the second problem for non-local clients,
- * by compressing the data before transmit by a factor of nearly 6.
- *
- * If you use this extension, your OS ought to nicely support shared memory.
- * This means: Shared memory should be swappable to the swap, and the limits
- * should be high enough (SHMMNI at least 64, SHMMAX at least 768 KB,
- * SHMALL at least 48 MB). It is a plus if your OS allows shmat() calls
- * on segments that have already been marked "removed", because it permits
- * these segments to be cleaned up by the OS if the X server is killed with
- * signal SIGKILL.
- *
- * This extension is transparently exploited by Xlib (functions XQueryFont,
- * XLoadQueryFont).
- */
-
-#ifdef HAVE_DIX_CONFIG_H
-#include <dix-config.h>
-#endif
-
-#include <sys/types.h>
-#ifdef HAS_SHM
-#if defined(linux) && (!defined(__GNU_LIBRARY__) || __GNU_LIBRARY__ < 2)
-/* libc4 does not define __GNU_LIBRARY__, libc5 defines __GNU_LIBRARY__ as 1 */
-/* Linux libc4 and libc5 only (because glibc doesn't include kernel headers):
- Linux 2.0.x and 2.2.x define SHMLBA as PAGE_SIZE, but forget to define
- PAGE_SIZE. It is defined in <asm/page.h>. */
-#include <asm/page.h>
-#endif
-#ifdef SVR4
-#include <sys/sysmacros.h>
-#endif
-#if defined(__CYGWIN__) || defined(__SCO__)
-#include <sys/param.h>
-#include <sys/sysmacros.h>
-#endif
-#include <sys/ipc.h>
-#include <sys/shm.h>
-#include <sys/stat.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <time.h>
-#include <errno.h>
-#endif
-
-#include <X11/X.h>
-#include <X11/Xproto.h>
-#include "misc.h"
-#include "os.h"
-#include "dixstruct.h"
-#include "gcstruct.h"
-#include "dixfontstr.h"
-#include "extnsionst.h"
-#include "protocol-versions.h"
-
-#include <X11/extensions/xf86bigfproto.h>
-#include "xf86bigfontsrv.h"
-
-static void XF86BigfontResetProc(
- ExtensionEntry * /* extEntry */
- );
-
-static DISPATCH_PROC(ProcXF86BigfontDispatch);
-static DISPATCH_PROC(ProcXF86BigfontQueryVersion);
-static DISPATCH_PROC(ProcXF86BigfontQueryFont);
-static DISPATCH_PROC(SProcXF86BigfontDispatch);
-static DISPATCH_PROC(SProcXF86BigfontQueryVersion);
-static DISPATCH_PROC(SProcXF86BigfontQueryFont);
-
-#ifdef HAS_SHM
-
-/* A random signature, transmitted to the clients so they can verify that the
- shared memory segment they are attaching to was really established by the
- X server they are talking to. */
-static CARD32 signature;
-
-/* Index for additional information stored in a FontRec's devPrivates array. */
-static int FontShmdescIndex;
-
-static unsigned int pagesize;
-
-static Bool badSysCall = FALSE;
-
-#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__CYGWIN__) || defined(__DragonFly__)
-
-#include <sys/signal.h>
-
-static void
-SigSysHandler(
- int signo)
-{
- badSysCall = TRUE;
-}
-
-static Bool
-CheckForShmSyscall(void)
-{
- void (*oldHandler)(int);
- 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, NULL);
- }
- else
- {
- /* Allocation failed */
- badSysCall = TRUE;
- }
- signal(SIGSYS, oldHandler);
- return (!badSysCall);
-}
-
-#define MUST_CHECK_FOR_SHM_SYSCALL
-
-#endif
-
-#endif
-
-void
-XFree86BigfontExtensionInit(void)
-{
- if (AddExtension(XF86BIGFONTNAME,
- XF86BigfontNumberEvents,
- XF86BigfontNumberErrors,
- ProcXF86BigfontDispatch,
- SProcXF86BigfontDispatch,
- XF86BigfontResetProc,
- StandardMinorOpcode)) {
-#ifdef HAS_SHM
-#ifdef MUST_CHECK_FOR_SHM_SYSCALL
- /*
- * Note: Local-clients will not be optimized without shared memory
- * support. Remote-client optimization does not depend on shared
- * memory support. Thus, the extension is still registered even
- * when shared memory support is not functional.
- */
- if (!CheckForShmSyscall()) {
- ErrorF(XF86BIGFONTNAME " extension local-client optimization disabled due to lack of shared memory support in the kernel\n");
- return;
- }
-#endif
-
- srand((unsigned int) time(NULL));
- signature = ((unsigned int) (65536.0/(RAND_MAX+1.0) * rand()) << 16)
- + (unsigned int) (65536.0/(RAND_MAX+1.0) * rand());
- /* fprintf(stderr, "signature = 0x%08X\n", signature); */
-
- FontShmdescIndex = AllocateFontPrivateIndex();
-
-#if !defined(CSRG_BASED) && !defined(__CYGWIN__)
- pagesize = SHMLBA;
-#else
-# ifdef _SC_PAGESIZE
- pagesize = sysconf(_SC_PAGESIZE);
-# else
- pagesize = getpagesize();
-# endif
-#endif
-#endif
- }
-}
-
-
-/* ========== Management of shared memory segments ========== */
-
-#ifdef HAS_SHM
-
-#ifdef __linux__
-/* On Linux, shared memory marked as "removed" can still be attached.
- Nice feature, because the kernel will automatically free the associated
- storage when the server and all clients are gone. */
-#define EARLY_REMOVE
-#endif
-
-typedef struct _ShmDesc {
- struct _ShmDesc *next;
- struct _ShmDesc **prev;
- int shmid;
- char *attach_addr;
-} ShmDescRec, *ShmDescPtr;
-
-static ShmDescPtr ShmList = (ShmDescPtr) NULL;
-
-static ShmDescPtr
-shmalloc(
- unsigned int size)
-{
- ShmDescPtr pDesc;
- int shmid;
- char *addr;
-
-#ifdef MUST_CHECK_FOR_SHM_SYSCALL
- if (pagesize == 0)
- return (ShmDescPtr) NULL;
-#endif
-
- /* On some older Linux systems, the number of shared memory segments
- system-wide is 127. In Linux 2.4, it is 4095.
- Therefore there is a tradeoff to be made between allocating a
- shared memory segment on one hand, and allocating memory and piping
- the glyph metrics on the other hand. If the glyph metrics size is
- small, we prefer the traditional way. */
- if (size < 3500)
- return (ShmDescPtr) NULL;
-
- pDesc = xalloc(sizeof(ShmDescRec));
- if (!pDesc)
- return (ShmDescPtr) NULL;
-
- size = (size + pagesize-1) & -pagesize;
- shmid = shmget(IPC_PRIVATE, size, S_IWUSR | S_IRUSR | S_IRGRP | S_IROTH);
- if (shmid == -1) {
- ErrorF(XF86BIGFONTNAME " extension: shmget() failed, size = %u, %s\n",
- size, strerror(errno));
- xfree(pDesc);
- return (ShmDescPtr) NULL;
- }
-
- if ((addr = shmat(shmid, 0, 0)) == (char *)-1) {
- ErrorF(XF86BIGFONTNAME " extension: shmat() failed, size = %u, %s\n",
- size, strerror(errno));
- shmctl(shmid, IPC_RMID, (void *) 0);
- xfree(pDesc);
- return (ShmDescPtr) NULL;
- }
-
-#ifdef EARLY_REMOVE
- shmctl(shmid, IPC_RMID, (void *) 0);
-#endif
-
- pDesc->shmid = shmid;
- pDesc->attach_addr = addr;
- if (ShmList) ShmList->prev = &pDesc->next;
- pDesc->next = ShmList;
- pDesc->prev = &ShmList;
- ShmList = pDesc;
-
- return pDesc;
-}
-
-static void
-shmdealloc(
- ShmDescPtr pDesc)
-{
-#ifndef EARLY_REMOVE
- shmctl(pDesc->shmid, IPC_RMID, (void *) 0);
-#endif
- shmdt(pDesc->attach_addr);
-
- if (pDesc->next) pDesc->next->prev = pDesc->prev;
- *pDesc->prev = pDesc->next;
- xfree(pDesc);
-}
-
-#endif
-
-/* Called when a font is closed. */
-void
-XF86BigfontFreeFontShm(
- FontPtr pFont)
-{
-#ifdef HAS_SHM
- ShmDescPtr pDesc;
-
- /* If during shutdown of the server, XF86BigfontCleanup() has already
- * called shmdealloc() for all segments, we don't need to do it here.
- */
- if (!ShmList)
- return;
-
- pDesc = (ShmDescPtr) FontGetPrivate(pFont, FontShmdescIndex);
- if (pDesc)
- shmdealloc(pDesc);
-#endif
-}
-
-/* Called upon fatal signal. */
-void
-XF86BigfontCleanup(void)
-{
-#ifdef HAS_SHM
- while (ShmList)
- shmdealloc(ShmList);
-#endif
-}
-
-/* Called when a server generation dies. */
-static void
-XF86BigfontResetProc(
- ExtensionEntry* extEntry)
-{
- /* This function is normally called from CloseDownExtensions(), called
- * from main(). It will be followed by a call to FreeAllResources(),
- * which will call XF86BigfontFreeFontShm() for each font. Thus it
- * appears that we do not need to do anything in this function. --
- * But I prefer to write robust code, and not keep shared memory lying
- * around when it's not needed any more. (Someone might close down the
- * extension without calling FreeAllResources()...)
- */
- XF86BigfontCleanup();
-}
-
-
-/* ========== Handling of extension specific requests ========== */
-
-static int
-ProcXF86BigfontQueryVersion(
- ClientPtr client)
-{
- xXF86BigfontQueryVersionReply reply;
-
- REQUEST_SIZE_MATCH(xXF86BigfontQueryVersionReq);
- reply.type = X_Reply;
- reply.length = 0;
- reply.sequenceNumber = client->sequence;
- reply.majorVersion = SERVER_XF86BIGFONT_MAJOR_VERSION;
- reply.minorVersion = SERVER_XF86BIGFONT_MINOR_VERSION;
- reply.uid = geteuid();
- reply.gid = getegid();
-#ifdef HAS_SHM
- reply.signature = signature;
-#else
- reply.signature = 0; /* This is redundant. Avoids uninitialized memory. */
-#endif
- reply.capabilities =
-#ifdef HAS_SHM
- (LocalClient(client) && !client->swapped ? XF86Bigfont_CAP_LocalShm : 0)
-#else
- 0
-#endif
- ; /* may add more bits here in future versions */
- if (client->swapped) {
- char tmp;
- swaps(&reply.sequenceNumber, tmp);
- swapl(&reply.length, tmp);
- swaps(&reply.majorVersion, tmp);
- swaps(&reply.minorVersion, tmp);
- swapl(&reply.uid, tmp);
- swapl(&reply.gid, tmp);
- swapl(&reply.signature, tmp);
- }
- WriteToClient(client,
- sizeof(xXF86BigfontQueryVersionReply), (char *)&reply);
- return client->noClientException;
-}
-
-static void
-swapCharInfo(
- xCharInfo *pCI)
-{
- char tmp;
-
- swaps(&pCI->leftSideBearing, tmp);
- swaps(&pCI->rightSideBearing, tmp);
- swaps(&pCI->characterWidth, tmp);
- swaps(&pCI->ascent, tmp);
- swaps(&pCI->descent, tmp);
- swaps(&pCI->attributes, tmp);
-}
-
-/* static CARD32 hashCI (xCharInfo *p); */
-#define hashCI(p) \
- (CARD32)(((p->leftSideBearing << 27) + (p->leftSideBearing >> 5) + \
- (p->rightSideBearing << 23) + (p->rightSideBearing >> 9) + \
- (p->characterWidth << 16) + \
- (p->ascent << 11) + (p->descent << 6)) ^ p->attributes)
-
-static int
-ProcXF86BigfontQueryFont(
- ClientPtr client)
-{
- FontPtr pFont;
- REQUEST(xXF86BigfontQueryFontReq);
- CARD32 stuff_flags;
- xCharInfo* pmax;
- xCharInfo* pmin;
- int nCharInfos;
- int shmid;
-#ifdef HAS_SHM
- ShmDescPtr pDesc;
-#else
-#define pDesc 0
-#endif
- xCharInfo* pCI;
- CARD16* pIndex2UniqIndex;
- CARD16* pUniqIndex2Index;
- CARD32 nUniqCharInfos;
-
-#if 0
- REQUEST_SIZE_MATCH(xXF86BigfontQueryFontReq);
-#else
- switch (client->req_len) {
- case 2: /* client with version 1.0 libX11 */
- stuff_flags = (LocalClient(client) && !client->swapped ? XF86Bigfont_FLAGS_Shm : 0);
- break;
- case 3: /* client with version 1.1 libX11 */
- stuff_flags = stuff->flags;
- break;
- default:
- return BadLength;
- }
-#endif
- client->errorValue = stuff->id; /* EITHER font or gc */
- dixLookupResourceByType((pointer *)&pFont, stuff->id, RT_FONT,
- client, DixGetAttrAccess);
- if (!pFont) {
- GC *pGC;
- dixLookupResourceByType((pointer *)&pGC, stuff->id, RT_GC,
- client, DixGetAttrAccess);
- if (!pGC)
- return BadFont; /* procotol spec says only error is BadFont */
-
- pFont = pGC->font;
- }
-
- pmax = FONTINKMAX(pFont);
- pmin = FONTINKMIN(pFont);
- nCharInfos =
- (pmax->rightSideBearing == pmin->rightSideBearing
- && pmax->leftSideBearing == pmin->leftSideBearing
- && pmax->descent == pmin->descent
- && pmax->ascent == pmin->ascent
- && pmax->characterWidth == pmin->characterWidth)
- ? 0 : N2dChars(pFont);
- shmid = -1;
- pCI = NULL;
- pIndex2UniqIndex = NULL;
- pUniqIndex2Index = NULL;
- nUniqCharInfos = 0;
-
- if (nCharInfos > 0) {
-#ifdef HAS_SHM
- if (!badSysCall)
- pDesc = (ShmDescPtr) FontGetPrivate(pFont, FontShmdescIndex);
- else
- pDesc = NULL;
- if (pDesc) {
- pCI = (xCharInfo *) pDesc->attach_addr;
- if (stuff_flags & XF86Bigfont_FLAGS_Shm)
- shmid = pDesc->shmid;
- } else {
- if (stuff_flags & XF86Bigfont_FLAGS_Shm && !badSysCall)
- pDesc = shmalloc(nCharInfos * sizeof(xCharInfo)
- + sizeof(CARD32));
- if (pDesc) {
- pCI = (xCharInfo *) pDesc->attach_addr;
- shmid = pDesc->shmid;
- } else {
-#endif
- pCI = xalloc(nCharInfos * sizeof(xCharInfo));
- if (!pCI)
- return BadAlloc;
-#ifdef HAS_SHM
- }
-#endif
- /* Fill nCharInfos starting at pCI. */
- {
- xCharInfo* prCI = pCI;
- int ninfos = 0;
- int ncols = pFont->info.lastCol - pFont->info.firstCol + 1;
- int row;
- for (row = pFont->info.firstRow;
- row <= pFont->info.lastRow && ninfos < nCharInfos;
- row++) {
- unsigned char chars[512];
- xCharInfo* tmpCharInfos[256];
- unsigned long count;
- int col;
- unsigned long i;
- i = 0;
- for (col = pFont->info.firstCol;
- col <= pFont->info.lastCol;
- col++) {
- chars[i++] = row;
- chars[i++] = col;
- }
- (*pFont->get_metrics) (pFont, ncols, chars, TwoD16Bit,
- &count, tmpCharInfos);
- for (i = 0; i < count && ninfos < nCharInfos; i++) {
- *prCI++ = *tmpCharInfos[i];
- ninfos++;
- }
- }
- }
-#ifdef HAS_SHM
- if (pDesc && !badSysCall) {
- *(CARD32 *)(pCI + nCharInfos) = signature;
- if (!FontSetPrivate(pFont, FontShmdescIndex, pDesc)) {
- shmdealloc(pDesc);
- return BadAlloc;
- }
- }
- }
-#endif
- if (shmid == -1) {
- /* Cannot use shared memory, so remove-duplicates the xCharInfos
- using a temporary hash table. */
- /* Note that CARD16 is suitable as index type, because
- nCharInfos <= 0x10000. */
- CARD32 hashModulus;
- CARD16* pHash2UniqIndex;
- CARD16* pUniqIndex2NextUniqIndex;
- CARD32 NextIndex;
- CARD32 NextUniqIndex;
- CARD16* tmp;
- CARD32 i, j;
-
- hashModulus = 67;
- if (hashModulus > nCharInfos+1)
- hashModulus = nCharInfos+1;
-
- tmp = xalloc((4*nCharInfos+1) * sizeof(CARD16));
- if (!tmp) {
- if (!pDesc) xfree(pCI);
- return BadAlloc;
- }
- pIndex2UniqIndex = tmp;
- /* nCharInfos elements */
- pUniqIndex2Index = tmp + nCharInfos;
- /* max. nCharInfos elements */
- pUniqIndex2NextUniqIndex = tmp + 2*nCharInfos;
- /* max. nCharInfos elements */
- pHash2UniqIndex = tmp + 3*nCharInfos;
- /* hashModulus (<= nCharInfos+1) elements */
-
- /* Note that we can use 0xffff as end-of-list indicator, because
- even if nCharInfos = 0x10000, 0xffff can not occur as valid
- entry before the last element has been inserted. And once the
- last element has been inserted, we don't need the hash table
- any more. */
- for (j = 0; j < hashModulus; j++)
- pHash2UniqIndex[j] = (CARD16)(-1);
-
- NextUniqIndex = 0;
- for (NextIndex = 0; NextIndex < nCharInfos; NextIndex++) {
- xCharInfo* p = &pCI[NextIndex];
- CARD32 hashCode = hashCI(p) % hashModulus;
- for (i = pHash2UniqIndex[hashCode];
- i != (CARD16)(-1);
- i = pUniqIndex2NextUniqIndex[i]) {
- j = pUniqIndex2Index[i];
- if (pCI[j].leftSideBearing == p->leftSideBearing
- && pCI[j].rightSideBearing == p->rightSideBearing
- && pCI[j].characterWidth == p->characterWidth
- && pCI[j].ascent == p->ascent
- && pCI[j].descent == p->descent
- && pCI[j].attributes == p->attributes)
- break;
- }
- if (i != (CARD16)(-1)) {
- /* Found *p at Index j, UniqIndex i */
- pIndex2UniqIndex[NextIndex] = i;
- } else {
- /* Allocate a new entry in the Uniq table */
- if (hashModulus <= 2*NextUniqIndex
- && hashModulus < nCharInfos+1) {
- /* Time to increate hash table size */
- hashModulus = 2*hashModulus+1;
- if (hashModulus > nCharInfos+1)
- hashModulus = nCharInfos+1;
- for (j = 0; j < hashModulus; j++)
- pHash2UniqIndex[j] = (CARD16)(-1);
- for (i = 0; i < NextUniqIndex; i++)
- pUniqIndex2NextUniqIndex[i] = (CARD16)(-1);
- for (i = 0; i < NextUniqIndex; i++) {
- j = pUniqIndex2Index[i];
- p = &pCI[j];
- hashCode = hashCI(p) % hashModulus;
- pUniqIndex2NextUniqIndex[i] = pHash2UniqIndex[hashCode];
- pHash2UniqIndex[hashCode] = i;
- }
- p = &pCI[NextIndex];
- hashCode = hashCI(p) % hashModulus;
- }
- i = NextUniqIndex++;
- pUniqIndex2NextUniqIndex[i] = pHash2UniqIndex[hashCode];
- pHash2UniqIndex[hashCode] = i;
- pUniqIndex2Index[i] = NextIndex;
- pIndex2UniqIndex[NextIndex] = i;
- }
- }
- nUniqCharInfos = NextUniqIndex;
- /* fprintf(stderr, "font metrics: nCharInfos = %d, nUniqCharInfos = %d, hashModulus = %d\n", nCharInfos, nUniqCharInfos, hashModulus); */
- }
- }
-
- {
- int nfontprops = pFont->info.nprops;
- int rlength =
- sizeof(xXF86BigfontQueryFontReply)
- + nfontprops * sizeof(xFontProp)
- + (nCharInfos > 0 && shmid == -1
- ? nUniqCharInfos * sizeof(xCharInfo)
- + (nCharInfos+1)/2 * 2 * sizeof(CARD16)
- : 0);
- xXF86BigfontQueryFontReply* reply = xalloc(rlength);
- char* p;
- if (!reply) {
- if (nCharInfos > 0) {
- if (shmid == -1) xfree(pIndex2UniqIndex);
- if (!pDesc) xfree(pCI);
- }
- return BadAlloc;
- }
- reply->type = X_Reply;
- reply->length = bytes_to_int32(rlength - sizeof(xGenericReply));
- reply->sequenceNumber = client->sequence;
- reply->minBounds = pFont->info.ink_minbounds;
- reply->maxBounds = pFont->info.ink_maxbounds;
- reply->minCharOrByte2 = pFont->info.firstCol;
- reply->maxCharOrByte2 = pFont->info.lastCol;
- reply->defaultChar = pFont->info.defaultCh;
- reply->nFontProps = pFont->info.nprops;
- reply->drawDirection = pFont->info.drawDirection;
- reply->minByte1 = pFont->info.firstRow;
- reply->maxByte1 = pFont->info.lastRow;
- reply->allCharsExist = pFont->info.allExist;
- reply->fontAscent = pFont->info.fontAscent;
- reply->fontDescent = pFont->info.fontDescent;
- reply->nCharInfos = nCharInfos;
- reply->nUniqCharInfos = nUniqCharInfos;
- reply->shmid = shmid;
- reply->shmsegoffset = 0;
- if (client->swapped) {
- char tmp;
- swaps(&reply->sequenceNumber, tmp);
- swapl(&reply->length, tmp);
- swapCharInfo(&reply->minBounds);
- swapCharInfo(&reply->maxBounds);
- swaps(&reply->minCharOrByte2, tmp);
- swaps(&reply->maxCharOrByte2, tmp);
- swaps(&reply->defaultChar, tmp);
- swaps(&reply->nFontProps, tmp);
- swaps(&reply->fontAscent, tmp);
- swaps(&reply->fontDescent, tmp);
- swapl(&reply->nCharInfos, tmp);
- swapl(&reply->nUniqCharInfos, tmp);
- swapl(&reply->shmid, tmp);
- swapl(&reply->shmsegoffset, tmp);
- }
- p = (char*) &reply[1];
- {
- FontPropPtr pFP;
- xFontProp* prFP;
- int i;
- for (i = 0, pFP = pFont->info.props, prFP = (xFontProp *) p;
- i < nfontprops;
- i++, pFP++, prFP++) {
- prFP->name = pFP->name;
- prFP->value = pFP->value;
- if (client->swapped) {
- char tmp;
- swapl(&prFP->name, tmp);
- swapl(&prFP->value, tmp);
- }
- }
- p = (char*) prFP;
- }
- if (nCharInfos > 0 && shmid == -1) {
- xCharInfo* pci;
- CARD16* ps;
- int i, j;
- pci = (xCharInfo*) p;
- for (i = 0; i < nUniqCharInfos; i++, pci++) {
- *pci = pCI[pUniqIndex2Index[i]];
- if (client->swapped)
- swapCharInfo(pci);
- }
- ps = (CARD16*) pci;
- for (j = 0; j < nCharInfos; j++, ps++) {
- *ps = pIndex2UniqIndex[j];
- if (client->swapped) {
- char tmp;
- swaps(ps, tmp);
- }
- }
- }
- WriteToClient(client, rlength, (char *)reply);
- xfree(reply);
- if (nCharInfos > 0) {
- if (shmid == -1) xfree(pIndex2UniqIndex);
- if (!pDesc) xfree(pCI);
- }
- return (client->noClientException);
- }
-}
-
-static int
-ProcXF86BigfontDispatch(
- ClientPtr client)
-{
- REQUEST(xReq);
-
- switch (stuff->data) {
- case X_XF86BigfontQueryVersion:
- return ProcXF86BigfontQueryVersion(client);
- case X_XF86BigfontQueryFont:
- return ProcXF86BigfontQueryFont(client);
- default:
- return BadRequest;
- }
-}
-
-static int
-SProcXF86BigfontQueryVersion(
- ClientPtr client)
-{
- REQUEST(xXF86BigfontQueryVersionReq);
- char tmp;
-
- swaps(&stuff->length, tmp);
- return ProcXF86BigfontQueryVersion(client);
-}
-
-static int
-SProcXF86BigfontQueryFont(
- ClientPtr client)
-{
- REQUEST(xXF86BigfontQueryFontReq);
- char tmp;
-
- swaps(&stuff->length, tmp);
- REQUEST_SIZE_MATCH(xXF86BigfontQueryFontReq);
- swapl(&stuff->id, tmp);
- return ProcXF86BigfontQueryFont(client);
-}
-
-static int
-SProcXF86BigfontDispatch(
- ClientPtr client)
-{
- REQUEST(xReq);
-
- switch (stuff->data) {
- case X_XF86BigfontQueryVersion:
- return SProcXF86BigfontQueryVersion(client);
- case X_XF86BigfontQueryFont:
- return SProcXF86BigfontQueryFont(client);
- default:
- return BadRequest;
- }
-}
+/*
+ * BIGFONT extension for sharing font metrics between clients (if possible)
+ * and for transmitting font metrics to clients in a compressed form.
+ *
+ * Copyright (c) 1999-2000 Bruno Haible
+ * Copyright (c) 1999-2000 The XFree86 Project, Inc.
+ */
+
+/* THIS IS NOT AN X CONSORTIUM STANDARD */
+
+/*
+ * Big fonts suffer from the following: All clients that have opened a
+ * font can access the complete glyph metrics array (the XFontStruct member
+ * `per_char') directly, without going through a macro. Moreover these
+ * glyph metrics are ink metrics, i.e. are not redundant even for a
+ * fixed-width font. For a Unicode font, the size of this array is 768 KB.
+ *
+ * Problems: 1. It eats a lot of memory in each client. 2. All this glyph
+ * metrics data is piped through the socket when the font is opened.
+ *
+ * This extension addresses these two problems for local clients, by using
+ * shared memory. It also addresses the second problem for non-local clients,
+ * by compressing the data before transmit by a factor of nearly 6.
+ *
+ * If you use this extension, your OS ought to nicely support shared memory.
+ * This means: Shared memory should be swappable to the swap, and the limits
+ * should be high enough (SHMMNI at least 64, SHMMAX at least 768 KB,
+ * SHMALL at least 48 MB). It is a plus if your OS allows shmat() calls
+ * on segments that have already been marked "removed", because it permits
+ * these segments to be cleaned up by the OS if the X server is killed with
+ * signal SIGKILL.
+ *
+ * This extension is transparently exploited by Xlib (functions XQueryFont,
+ * XLoadQueryFont).
+ */
+
+#ifdef HAVE_DIX_CONFIG_H
+#include <dix-config.h>
+#endif
+
+#include <sys/types.h>
+#ifdef HAS_SHM
+#if defined(linux) && (!defined(__GNU_LIBRARY__) || __GNU_LIBRARY__ < 2)
+/* libc4 does not define __GNU_LIBRARY__, libc5 defines __GNU_LIBRARY__ as 1 */
+/* Linux libc4 and libc5 only (because glibc doesn't include kernel headers):
+ Linux 2.0.x and 2.2.x define SHMLBA as PAGE_SIZE, but forget to define
+ PAGE_SIZE. It is defined in <asm/page.h>. */
+#include <asm/page.h>
+#endif
+#ifdef SVR4
+#include <sys/sysmacros.h>
+#endif
+#if defined(__CYGWIN__) || defined(__SCO__)
+#include <sys/param.h>
+#include <sys/sysmacros.h>
+#endif
+#include <sys/ipc.h>
+#include <sys/shm.h>
+#include <sys/stat.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <time.h>
+#include <errno.h>
+#endif
+
+#include <X11/X.h>
+#include <X11/Xproto.h>
+#include "misc.h"
+#include "os.h"
+#include "dixstruct.h"
+#include "gcstruct.h"
+#include "dixfontstr.h"
+#include "extnsionst.h"
+#include "protocol-versions.h"
+
+#include <X11/extensions/xf86bigfproto.h>
+#include "xf86bigfontsrv.h"
+
+static void XF86BigfontResetProc(
+ ExtensionEntry * /* extEntry */
+ );
+
+static DISPATCH_PROC(ProcXF86BigfontDispatch);
+static DISPATCH_PROC(ProcXF86BigfontQueryVersion);
+static DISPATCH_PROC(ProcXF86BigfontQueryFont);
+static DISPATCH_PROC(SProcXF86BigfontDispatch);
+static DISPATCH_PROC(SProcXF86BigfontQueryVersion);
+static DISPATCH_PROC(SProcXF86BigfontQueryFont);
+
+#ifdef HAS_SHM
+
+/* A random signature, transmitted to the clients so they can verify that the
+ shared memory segment they are attaching to was really established by the
+ X server they are talking to. */
+static CARD32 signature;
+
+/* Index for additional information stored in a FontRec's devPrivates array. */
+static int FontShmdescIndex;
+
+static unsigned int pagesize;
+
+static Bool badSysCall = FALSE;
+
+#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__CYGWIN__) || defined(__DragonFly__)
+
+#include <sys/signal.h>
+
+static void
+SigSysHandler(
+ int signo)
+{
+ badSysCall = TRUE;
+}
+
+static Bool
+CheckForShmSyscall(void)
+{
+ void (*oldHandler)(int);
+ 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, NULL);
+ }
+ else
+ {
+ /* Allocation failed */
+ badSysCall = TRUE;
+ }
+ signal(SIGSYS, oldHandler);
+ return (!badSysCall);
+}
+
+#define MUST_CHECK_FOR_SHM_SYSCALL
+
+#endif
+
+#endif
+
+void
+XFree86BigfontExtensionInit(void)
+{
+ if (AddExtension(XF86BIGFONTNAME,
+ XF86BigfontNumberEvents,
+ XF86BigfontNumberErrors,
+ ProcXF86BigfontDispatch,
+ SProcXF86BigfontDispatch,
+ XF86BigfontResetProc,
+ StandardMinorOpcode)) {
+#ifdef HAS_SHM
+#ifdef MUST_CHECK_FOR_SHM_SYSCALL
+ /*
+ * Note: Local-clients will not be optimized without shared memory
+ * support. Remote-client optimization does not depend on shared
+ * memory support. Thus, the extension is still registered even
+ * when shared memory support is not functional.
+ */
+ if (!CheckForShmSyscall()) {
+ ErrorF(XF86BIGFONTNAME " extension local-client optimization disabled due to lack of shared memory support in the kernel\n");
+ return;
+ }
+#endif
+
+ srand((unsigned int) time(NULL));
+ signature = ((unsigned int) (65536.0/(RAND_MAX+1.0) * rand()) << 16)
+ + (unsigned int) (65536.0/(RAND_MAX+1.0) * rand());
+ /* fprintf(stderr, "signature = 0x%08X\n", signature); */
+
+ FontShmdescIndex = AllocateFontPrivateIndex();
+
+#if !defined(CSRG_BASED) && !defined(__CYGWIN__)
+ pagesize = SHMLBA;
+#else
+# ifdef _SC_PAGESIZE
+ pagesize = sysconf(_SC_PAGESIZE);
+# else
+ pagesize = getpagesize();
+# endif
+#endif
+#endif
+ }
+}
+
+
+/* ========== Management of shared memory segments ========== */
+
+#ifdef HAS_SHM
+
+#ifdef __linux__
+/* On Linux, shared memory marked as "removed" can still be attached.
+ Nice feature, because the kernel will automatically free the associated
+ storage when the server and all clients are gone. */
+#define EARLY_REMOVE
+#endif
+
+typedef struct _ShmDesc {
+ struct _ShmDesc *next;
+ struct _ShmDesc **prev;
+ int shmid;
+ char *attach_addr;
+} ShmDescRec, *ShmDescPtr;
+
+static ShmDescPtr ShmList = (ShmDescPtr) NULL;
+
+static ShmDescPtr
+shmalloc(
+ unsigned int size)
+{
+ ShmDescPtr pDesc;
+ int shmid;
+ char *addr;
+
+#ifdef MUST_CHECK_FOR_SHM_SYSCALL
+ if (pagesize == 0)
+ return (ShmDescPtr) NULL;
+#endif
+
+ /* On some older Linux systems, the number of shared memory segments
+ system-wide is 127. In Linux 2.4, it is 4095.
+ Therefore there is a tradeoff to be made between allocating a
+ shared memory segment on one hand, and allocating memory and piping
+ the glyph metrics on the other hand. If the glyph metrics size is
+ small, we prefer the traditional way. */
+ if (size < 3500)
+ return (ShmDescPtr) NULL;
+
+ pDesc = xalloc(sizeof(ShmDescRec));
+ if (!pDesc)
+ return (ShmDescPtr) NULL;
+
+ size = (size + pagesize-1) & -pagesize;
+ shmid = shmget(IPC_PRIVATE, size, S_IWUSR | S_IRUSR | S_IRGRP | S_IROTH);
+ if (shmid == -1) {
+ ErrorF(XF86BIGFONTNAME " extension: shmget() failed, size = %u, %s\n",
+ size, strerror(errno));
+ xfree(pDesc);
+ return (ShmDescPtr) NULL;
+ }
+
+ if ((addr = shmat(shmid, 0, 0)) == (char *)-1) {
+ ErrorF(XF86BIGFONTNAME " extension: shmat() failed, size = %u, %s\n",
+ size, strerror(errno));
+ shmctl(shmid, IPC_RMID, (void *) 0);
+ xfree(pDesc);
+ return (ShmDescPtr) NULL;
+ }
+
+#ifdef EARLY_REMOVE
+ shmctl(shmid, IPC_RMID, (void *) 0);
+#endif
+
+ pDesc->shmid = shmid;
+ pDesc->attach_addr = addr;
+ if (ShmList) ShmList->prev = &pDesc->next;
+ pDesc->next = ShmList;
+ pDesc->prev = &ShmList;
+ ShmList = pDesc;
+
+ return pDesc;
+}
+
+static void
+shmdealloc(
+ ShmDescPtr pDesc)
+{
+#ifndef EARLY_REMOVE
+ shmctl(pDesc->shmid, IPC_RMID, (void *) 0);
+#endif
+ shmdt(pDesc->attach_addr);
+
+ if (pDesc->next) pDesc->next->prev = pDesc->prev;
+ *pDesc->prev = pDesc->next;
+ xfree(pDesc);
+}
+
+#endif
+
+/* Called when a font is closed. */
+void
+XF86BigfontFreeFontShm(
+ FontPtr pFont)
+{
+#ifdef HAS_SHM
+ ShmDescPtr pDesc;
+
+ /* If during shutdown of the server, XF86BigfontCleanup() has already
+ * called shmdealloc() for all segments, we don't need to do it here.
+ */
+ if (!ShmList)
+ return;
+
+ pDesc = (ShmDescPtr) FontGetPrivate(pFont, FontShmdescIndex);
+ if (pDesc)
+ shmdealloc(pDesc);
+#endif
+}
+
+/* Called upon fatal signal. */
+void
+XF86BigfontCleanup(void)
+{
+#ifdef HAS_SHM
+ while (ShmList)
+ shmdealloc(ShmList);
+#endif
+}
+
+/* Called when a server generation dies. */
+static void
+XF86BigfontResetProc(
+ ExtensionEntry* extEntry)
+{
+ /* This function is normally called from CloseDownExtensions(), called
+ * from main(). It will be followed by a call to FreeAllResources(),
+ * which will call XF86BigfontFreeFontShm() for each font. Thus it
+ * appears that we do not need to do anything in this function. --
+ * But I prefer to write robust code, and not keep shared memory lying
+ * around when it's not needed any more. (Someone might close down the
+ * extension without calling FreeAllResources()...)
+ */
+ XF86BigfontCleanup();
+}
+
+
+/* ========== Handling of extension specific requests ========== */
+
+static int
+ProcXF86BigfontQueryVersion(
+ ClientPtr client)
+{
+ xXF86BigfontQueryVersionReply reply;
+
+ REQUEST_SIZE_MATCH(xXF86BigfontQueryVersionReq);
+ reply.type = X_Reply;
+ reply.length = 0;
+ reply.sequenceNumber = client->sequence;
+ reply.majorVersion = SERVER_XF86BIGFONT_MAJOR_VERSION;
+ reply.minorVersion = SERVER_XF86BIGFONT_MINOR_VERSION;
+ reply.uid = geteuid();
+ reply.gid = getegid();
+#ifdef HAS_SHM
+ reply.signature = signature;
+#else
+ reply.signature = 0; /* This is redundant. Avoids uninitialized memory. */
+#endif
+ reply.capabilities =
+#ifdef HAS_SHM
+ (LocalClient(client) && !client->swapped ? XF86Bigfont_CAP_LocalShm : 0)
+#else
+ 0
+#endif
+ ; /* may add more bits here in future versions */
+ if (client->swapped) {
+ char tmp;
+ swaps(&reply.sequenceNumber, tmp);
+ swapl(&reply.length, tmp);
+ swaps(&reply.majorVersion, tmp);
+ swaps(&reply.minorVersion, tmp);
+ swapl(&reply.uid, tmp);
+ swapl(&reply.gid, tmp);
+ swapl(&reply.signature, tmp);
+ }
+ WriteToClient(client,
+ sizeof(xXF86BigfontQueryVersionReply), (char *)&reply);
+ return client->noClientException;
+}
+
+static void
+swapCharInfo(
+ xCharInfo *pCI)
+{
+ char tmp;
+
+ swaps(&pCI->leftSideBearing, tmp);
+ swaps(&pCI->rightSideBearing, tmp);
+ swaps(&pCI->characterWidth, tmp);
+ swaps(&pCI->ascent, tmp);
+ swaps(&pCI->descent, tmp);
+ swaps(&pCI->attributes, tmp);
+}
+
+/* static CARD32 hashCI (xCharInfo *p); */
+#define hashCI(p) \
+ (CARD32)(((p->leftSideBearing << 27) + (p->leftSideBearing >> 5) + \
+ (p->rightSideBearing << 23) + (p->rightSideBearing >> 9) + \
+ (p->characterWidth << 16) + \
+ (p->ascent << 11) + (p->descent << 6)) ^ p->attributes)
+
+static int
+ProcXF86BigfontQueryFont(
+ ClientPtr client)
+{
+ FontPtr pFont;
+ REQUEST(xXF86BigfontQueryFontReq);
+ CARD32 stuff_flags;
+ xCharInfo* pmax;
+ xCharInfo* pmin;
+ int nCharInfos;
+ int shmid;
+#ifdef HAS_SHM
+ ShmDescPtr pDesc;
+#else
+#define pDesc 0
+#endif
+ xCharInfo* pCI;
+ CARD16* pIndex2UniqIndex;
+ CARD16* pUniqIndex2Index;
+ CARD32 nUniqCharInfos;
+
+#if 0
+ REQUEST_SIZE_MATCH(xXF86BigfontQueryFontReq);
+#else
+ switch (client->req_len) {
+ case 2: /* client with version 1.0 libX11 */
+ stuff_flags = (LocalClient(client) && !client->swapped ? XF86Bigfont_FLAGS_Shm : 0);
+ break;
+ case 3: /* client with version 1.1 libX11 */
+ stuff_flags = stuff->flags;
+ break;
+ default:
+ return BadLength;
+ }
+#endif
+ if (dixLookupFontable(&pFont, stuff->id, client, DixGetAttrAccess) != Success)
+ return BadFont; /* procotol spec says only error is BadFont */
+
+ pmax = FONTINKMAX(pFont);
+ pmin = FONTINKMIN(pFont);
+ nCharInfos =
+ (pmax->rightSideBearing == pmin->rightSideBearing
+ && pmax->leftSideBearing == pmin->leftSideBearing
+ && pmax->descent == pmin->descent
+ && pmax->ascent == pmin->ascent
+ && pmax->characterWidth == pmin->characterWidth)
+ ? 0 : N2dChars(pFont);
+ shmid = -1;
+ pCI = NULL;
+ pIndex2UniqIndex = NULL;
+ pUniqIndex2Index = NULL;
+ nUniqCharInfos = 0;
+
+ if (nCharInfos > 0) {
+#ifdef HAS_SHM
+ if (!badSysCall)
+ pDesc = (ShmDescPtr) FontGetPrivate(pFont, FontShmdescIndex);
+ else
+ pDesc = NULL;
+ if (pDesc) {
+ pCI = (xCharInfo *) pDesc->attach_addr;
+ if (stuff_flags & XF86Bigfont_FLAGS_Shm)
+ shmid = pDesc->shmid;
+ } else {
+ if (stuff_flags & XF86Bigfont_FLAGS_Shm && !badSysCall)
+ pDesc = shmalloc(nCharInfos * sizeof(xCharInfo)
+ + sizeof(CARD32));
+ if (pDesc) {
+ pCI = (xCharInfo *) pDesc->attach_addr;
+ shmid = pDesc->shmid;
+ } else {
+#endif
+ pCI = xalloc(nCharInfos * sizeof(xCharInfo));
+ if (!pCI)
+ return BadAlloc;
+#ifdef HAS_SHM
+ }
+#endif
+ /* Fill nCharInfos starting at pCI. */
+ {
+ xCharInfo* prCI = pCI;
+ int ninfos = 0;
+ int ncols = pFont->info.lastCol - pFont->info.firstCol + 1;
+ int row;
+ for (row = pFont->info.firstRow;
+ row <= pFont->info.lastRow && ninfos < nCharInfos;
+ row++) {
+ unsigned char chars[512];
+ xCharInfo* tmpCharInfos[256];
+ unsigned long count;
+ int col;
+ unsigned long i;
+ i = 0;
+ for (col = pFont->info.firstCol;
+ col <= pFont->info.lastCol;
+ col++) {
+ chars[i++] = row;
+ chars[i++] = col;
+ }
+ (*pFont->get_metrics) (pFont, ncols, chars, TwoD16Bit,
+ &count, tmpCharInfos);
+ for (i = 0; i < count && ninfos < nCharInfos; i++) {
+ *prCI++ = *tmpCharInfos[i];
+ ninfos++;
+ }
+ }
+ }
+#ifdef HAS_SHM
+ if (pDesc && !badSysCall) {
+ *(CARD32 *)(pCI + nCharInfos) = signature;
+ if (!FontSetPrivate(pFont, FontShmdescIndex, pDesc)) {
+ shmdealloc(pDesc);
+ return BadAlloc;
+ }
+ }
+ }
+#endif
+ if (shmid == -1) {
+ /* Cannot use shared memory, so remove-duplicates the xCharInfos
+ using a temporary hash table. */
+ /* Note that CARD16 is suitable as index type, because
+ nCharInfos <= 0x10000. */
+ CARD32 hashModulus;
+ CARD16* pHash2UniqIndex;
+ CARD16* pUniqIndex2NextUniqIndex;
+ CARD32 NextIndex;
+ CARD32 NextUniqIndex;
+ CARD16* tmp;
+ CARD32 i, j;
+
+ hashModulus = 67;
+ if (hashModulus > nCharInfos+1)
+ hashModulus = nCharInfos+1;
+
+ tmp = xalloc((4*nCharInfos+1) * sizeof(CARD16));
+ if (!tmp) {
+ if (!pDesc) xfree(pCI);
+ return BadAlloc;
+ }
+ pIndex2UniqIndex = tmp;
+ /* nCharInfos elements */
+ pUniqIndex2Index = tmp + nCharInfos;
+ /* max. nCharInfos elements */
+ pUniqIndex2NextUniqIndex = tmp + 2*nCharInfos;
+ /* max. nCharInfos elements */
+ pHash2UniqIndex = tmp + 3*nCharInfos;
+ /* hashModulus (<= nCharInfos+1) elements */
+
+ /* Note that we can use 0xffff as end-of-list indicator, because
+ even if nCharInfos = 0x10000, 0xffff can not occur as valid
+ entry before the last element has been inserted. And once the
+ last element has been inserted, we don't need the hash table
+ any more. */
+ for (j = 0; j < hashModulus; j++)
+ pHash2UniqIndex[j] = (CARD16)(-1);
+
+ NextUniqIndex = 0;
+ for (NextIndex = 0; NextIndex < nCharInfos; NextIndex++) {
+ xCharInfo* p = &pCI[NextIndex];
+ CARD32 hashCode = hashCI(p) % hashModulus;
+ for (i = pHash2UniqIndex[hashCode];
+ i != (CARD16)(-1);
+ i = pUniqIndex2NextUniqIndex[i]) {
+ j = pUniqIndex2Index[i];
+ if (pCI[j].leftSideBearing == p->leftSideBearing
+ && pCI[j].rightSideBearing == p->rightSideBearing
+ && pCI[j].characterWidth == p->characterWidth
+ && pCI[j].ascent == p->ascent
+ && pCI[j].descent == p->descent
+ && pCI[j].attributes == p->attributes)
+ break;
+ }
+ if (i != (CARD16)(-1)) {
+ /* Found *p at Index j, UniqIndex i */
+ pIndex2UniqIndex[NextIndex] = i;
+ } else {
+ /* Allocate a new entry in the Uniq table */
+ if (hashModulus <= 2*NextUniqIndex
+ && hashModulus < nCharInfos+1) {
+ /* Time to increate hash table size */
+ hashModulus = 2*hashModulus+1;
+ if (hashModulus > nCharInfos+1)
+ hashModulus = nCharInfos+1;
+ for (j = 0; j < hashModulus; j++)
+ pHash2UniqIndex[j] = (CARD16)(-1);
+ for (i = 0; i < NextUniqIndex; i++)
+ pUniqIndex2NextUniqIndex[i] = (CARD16)(-1);
+ for (i = 0; i < NextUniqIndex; i++) {
+ j = pUniqIndex2Index[i];
+ p = &pCI[j];
+ hashCode = hashCI(p) % hashModulus;
+ pUniqIndex2NextUniqIndex[i] = pHash2UniqIndex[hashCode];
+ pHash2UniqIndex[hashCode] = i;
+ }
+ p = &pCI[NextIndex];
+ hashCode = hashCI(p) % hashModulus;
+ }
+ i = NextUniqIndex++;
+ pUniqIndex2NextUniqIndex[i] = pHash2UniqIndex[hashCode];
+ pHash2UniqIndex[hashCode] = i;
+ pUniqIndex2Index[i] = NextIndex;
+ pIndex2UniqIndex[NextIndex] = i;
+ }
+ }
+ nUniqCharInfos = NextUniqIndex;
+ /* fprintf(stderr, "font metrics: nCharInfos = %d, nUniqCharInfos = %d, hashModulus = %d\n", nCharInfos, nUniqCharInfos, hashModulus); */
+ }
+ }
+
+ {
+ int nfontprops = pFont->info.nprops;
+ int rlength =
+ sizeof(xXF86BigfontQueryFontReply)
+ + nfontprops * sizeof(xFontProp)
+ + (nCharInfos > 0 && shmid == -1
+ ? nUniqCharInfos * sizeof(xCharInfo)
+ + (nCharInfos+1)/2 * 2 * sizeof(CARD16)
+ : 0);
+ xXF86BigfontQueryFontReply* reply = xalloc(rlength);
+ char* p;
+ if (!reply) {
+ if (nCharInfos > 0) {
+ if (shmid == -1) xfree(pIndex2UniqIndex);
+ if (!pDesc) xfree(pCI);
+ }
+ return BadAlloc;
+ }
+ reply->type = X_Reply;
+ reply->length = bytes_to_int32(rlength - sizeof(xGenericReply));
+ reply->sequenceNumber = client->sequence;
+ reply->minBounds = pFont->info.ink_minbounds;
+ reply->maxBounds = pFont->info.ink_maxbounds;
+ reply->minCharOrByte2 = pFont->info.firstCol;
+ reply->maxCharOrByte2 = pFont->info.lastCol;
+ reply->defaultChar = pFont->info.defaultCh;
+ reply->nFontProps = pFont->info.nprops;
+ reply->drawDirection = pFont->info.drawDirection;
+ reply->minByte1 = pFont->info.firstRow;
+ reply->maxByte1 = pFont->info.lastRow;
+ reply->allCharsExist = pFont->info.allExist;
+ reply->fontAscent = pFont->info.fontAscent;
+ reply->fontDescent = pFont->info.fontDescent;
+ reply->nCharInfos = nCharInfos;
+ reply->nUniqCharInfos = nUniqCharInfos;
+ reply->shmid = shmid;
+ reply->shmsegoffset = 0;
+ if (client->swapped) {
+ char tmp;
+ swaps(&reply->sequenceNumber, tmp);
+ swapl(&reply->length, tmp);
+ swapCharInfo(&reply->minBounds);
+ swapCharInfo(&reply->maxBounds);
+ swaps(&reply->minCharOrByte2, tmp);
+ swaps(&reply->maxCharOrByte2, tmp);
+ swaps(&reply->defaultChar, tmp);
+ swaps(&reply->nFontProps, tmp);
+ swaps(&reply->fontAscent, tmp);
+ swaps(&reply->fontDescent, tmp);
+ swapl(&reply->nCharInfos, tmp);
+ swapl(&reply->nUniqCharInfos, tmp);
+ swapl(&reply->shmid, tmp);
+ swapl(&reply->shmsegoffset, tmp);
+ }
+ p = (char*) &reply[1];
+ {
+ FontPropPtr pFP;
+ xFontProp* prFP;
+ int i;
+ for (i = 0, pFP = pFont->info.props, prFP = (xFontProp *) p;
+ i < nfontprops;
+ i++, pFP++, prFP++) {
+ prFP->name = pFP->name;
+ prFP->value = pFP->value;
+ if (client->swapped) {
+ char tmp;
+ swapl(&prFP->name, tmp);
+ swapl(&prFP->value, tmp);
+ }
+ }
+ p = (char*) prFP;
+ }
+ if (nCharInfos > 0 && shmid == -1) {
+ xCharInfo* pci;
+ CARD16* ps;
+ int i, j;
+ pci = (xCharInfo*) p;
+ for (i = 0; i < nUniqCharInfos; i++, pci++) {
+ *pci = pCI[pUniqIndex2Index[i]];
+ if (client->swapped)
+ swapCharInfo(pci);
+ }
+ ps = (CARD16*) pci;
+ for (j = 0; j < nCharInfos; j++, ps++) {
+ *ps = pIndex2UniqIndex[j];
+ if (client->swapped) {
+ char tmp;
+ swaps(ps, tmp);
+ }
+ }
+ }
+ WriteToClient(client, rlength, (char *)reply);
+ xfree(reply);
+ if (nCharInfos > 0) {
+ if (shmid == -1) xfree(pIndex2UniqIndex);
+ if (!pDesc) xfree(pCI);
+ }
+ return (client->noClientException);
+ }
+}
+
+static int
+ProcXF86BigfontDispatch(
+ ClientPtr client)
+{
+ REQUEST(xReq);
+
+ switch (stuff->data) {
+ case X_XF86BigfontQueryVersion:
+ return ProcXF86BigfontQueryVersion(client);
+ case X_XF86BigfontQueryFont:
+ return ProcXF86BigfontQueryFont(client);
+ default:
+ return BadRequest;
+ }
+}
+
+static int
+SProcXF86BigfontQueryVersion(
+ ClientPtr client)
+{
+ REQUEST(xXF86BigfontQueryVersionReq);
+ char tmp;
+
+ swaps(&stuff->length, tmp);
+ return ProcXF86BigfontQueryVersion(client);
+}
+
+static int
+SProcXF86BigfontQueryFont(
+ ClientPtr client)
+{
+ REQUEST(xXF86BigfontQueryFontReq);
+ char tmp;
+
+ swaps(&stuff->length, tmp);
+ REQUEST_SIZE_MATCH(xXF86BigfontQueryFontReq);
+ swapl(&stuff->id, tmp);
+ return ProcXF86BigfontQueryFont(client);
+}
+
+static int
+SProcXF86BigfontDispatch(
+ ClientPtr client)
+{
+ REQUEST(xReq);
+
+ switch (stuff->data) {
+ case X_XF86BigfontQueryVersion:
+ return SProcXF86BigfontQueryVersion(client);
+ case X_XF86BigfontQueryFont:
+ return SProcXF86BigfontQueryFont(client);
+ default:
+ return BadRequest;
+ }
+}
--
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