diff options
Diffstat (limited to 'xorg-server/Xext/xf86bigfont.c')
| -rw-r--r-- | xorg-server/Xext/xf86bigfont.c | 1528 |
1 files changed, 759 insertions, 769 deletions
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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