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Diffstat (limited to 'nx-X11/lib/src/Font.c')
| -rw-r--r-- | nx-X11/lib/src/Font.c | 708 |
1 files changed, 708 insertions, 0 deletions
diff --git a/nx-X11/lib/src/Font.c b/nx-X11/lib/src/Font.c new file mode 100644 index 000000000..6bbab3f19 --- /dev/null +++ b/nx-X11/lib/src/Font.c @@ -0,0 +1,708 @@ +/* + +Copyright 1986, 1998 The Open Group +Copyright (c) 2000 The XFree86 Project, Inc. + +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 +X CONSORTIUM OR THE XFREE86 PROJECT 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 X Consortium or of the +XFree86 Project 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 X Consortium and the XFree86 Project. + +*/ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif +#include "Xlibint.h" +#include <limits.h> + +#if defined(XF86BIGFONT) +#define USE_XF86BIGFONT +#endif +#ifdef USE_XF86BIGFONT +#include <sys/types.h> +#ifdef HAS_SHM +#include <sys/ipc.h> +#include <sys/shm.h> +#endif + +#include <stdio.h> +#include <stdlib.h> +#include <nx-X11/extensions/xf86bigfproto.h> +#endif + +#include "Xlcint.h" +#include "XlcPubI.h" + + +static XFontStruct *_XQueryFont( + Display* /* dpy */, + Font /* fid */, + unsigned long /* seq */ +); + +#ifdef USE_XF86BIGFONT + +/* Private data for this extension. */ +typedef struct { + XExtCodes *codes; + CARD32 serverSignature; + CARD32 serverCapabilities; +} XF86BigfontCodes; + +/* Additional bit masks that can be set in serverCapabilities */ +#define CAP_VerifiedLocal 256 + +static XF86BigfontCodes *_XF86BigfontCodes( + Display* /* dpy */ +); + +static XFontStruct *_XF86BigfontQueryFont( + Display* /* dpy */, + XF86BigfontCodes* /* extcodes */, + Font /* fid */, + unsigned long /* seq */ +); + +void _XF86BigfontFreeFontMetrics( + XFontStruct* /* fs */ +); + +#endif /* USE_XF86BIGFONT */ + + +XFontStruct *XLoadQueryFont( + register Display *dpy, + _Xconst char *name) +{ + XFontStruct *font_result; + register long nbytes; + Font fid; + xOpenFontReq *req; + unsigned long seq; +#ifdef USE_XF86BIGFONT + XF86BigfontCodes *extcodes = _XF86BigfontCodes(dpy); +#endif + + if (_XF86LoadQueryLocaleFont(dpy, name, &font_result, (Font *)0)) + return font_result; + LockDisplay(dpy); + GetReq(OpenFont, req); + seq = dpy->request; + nbytes = req->nbytes = name ? strlen(name) : 0; + req->fid = fid = XAllocID(dpy); + req->length += (nbytes+3)>>2; + Data (dpy, name, nbytes); + font_result = NULL; +#ifdef USE_XF86BIGFONT + if (extcodes) { + font_result = _XF86BigfontQueryFont(dpy, extcodes, fid, seq); + seq = 0; + } +#endif + if (!font_result) + font_result = _XQueryFont(dpy, fid, seq); + UnlockDisplay(dpy); + SyncHandle(); + return font_result; +} + +XFontStruct *XQueryFont ( + register Display *dpy, + Font fid) +{ + XFontStruct *font_result; +#ifdef USE_XF86BIGFONT + XF86BigfontCodes *extcodes = _XF86BigfontCodes(dpy); +#endif + + LockDisplay(dpy); + font_result = NULL; +#ifdef USE_XF86BIGFONT + if (extcodes) { + font_result = _XF86BigfontQueryFont(dpy, extcodes, fid, 0L); + } +#endif + if (!font_result) + font_result = _XQueryFont(dpy, fid, 0L); + UnlockDisplay(dpy); + SyncHandle(); + return font_result; +} + +int +XFreeFont( + register Display *dpy, + XFontStruct *fs) +{ + register xResourceReq *req; + register _XExtension *ext; + + LockDisplay(dpy); + /* call out to any extensions interested */ + for (ext = dpy->ext_procs; ext; ext = ext->next) + if (ext->free_Font) (*ext->free_Font)(dpy, fs, &ext->codes); + GetResReq (CloseFont, fs->fid, req); + UnlockDisplay(dpy); + SyncHandle(); + if (fs->per_char) { +#ifdef USE_XF86BIGFONT + _XF86BigfontFreeFontMetrics(fs); +#else + Xfree (fs->per_char); +#endif + } + _XFreeExtData(fs->ext_data); + + Xfree (fs->properties); + Xfree (fs); + return 1; +} + + +static XFontStruct * +_XQueryFont ( + register Display *dpy, + Font fid, + unsigned long seq) +{ + register XFontStruct *fs; + unsigned long nbytes; + unsigned long reply_left; /* unused data words left in reply buffer */ + xQueryFontReply reply; + register xResourceReq *req; + register _XExtension *ext; + _XAsyncHandler async; + _XAsyncErrorState async_state; + + if (seq) { + async_state.min_sequence_number = seq; + async_state.max_sequence_number = seq; + async_state.error_code = BadName; + async_state.major_opcode = X_OpenFont; + async_state.minor_opcode = 0; + async_state.error_count = 0; + async.next = dpy->async_handlers; + async.handler = _XAsyncErrorHandler; + async.data = (XPointer)&async_state; + dpy->async_handlers = &async; + } + GetResReq(QueryFont, fid, req); + if (!_XReply (dpy, (xReply *) &reply, + ((SIZEOF(xQueryFontReply) - SIZEOF(xReply)) >> 2), xFalse)) { + if (seq) + DeqAsyncHandler(dpy, &async); + return (XFontStruct *)NULL; + } + if (seq) + DeqAsyncHandler(dpy, &async); + reply_left = reply.length - + ((SIZEOF(xQueryFontReply) - SIZEOF(xReply)) >> 2); + if (! (fs = Xmalloc (sizeof (XFontStruct)))) { + _XEatDataWords(dpy, reply_left); + return (XFontStruct *)NULL; + } + fs->ext_data = NULL; + fs->fid = fid; + fs->direction = reply.drawDirection; + fs->min_char_or_byte2 = reply.minCharOrByte2; + fs->max_char_or_byte2 = reply.maxCharOrByte2; + fs->min_byte1 = reply.minByte1; + fs->max_byte1 = reply.maxByte1; + fs->default_char = reply.defaultChar; + fs->all_chars_exist = reply.allCharsExist; + fs->ascent = cvtINT16toInt (reply.fontAscent); + fs->descent = cvtINT16toInt (reply.fontDescent); + + /* XXX the next two statements won't work if short isn't 16 bits */ + fs->min_bounds = * (XCharStruct *) &reply.minBounds; + fs->max_bounds = * (XCharStruct *) &reply.maxBounds; + + fs->n_properties = reply.nFontProps; + /* + * if no properties defined for the font, then it is bad + * font, but shouldn't try to read nothing. + */ + fs->properties = NULL; + if (fs->n_properties > 0) { + /* nFontProps is a CARD16 */ + nbytes = reply.nFontProps * SIZEOF(xFontProp); + if ((nbytes >> 2) <= reply_left) { + size_t pbytes = reply.nFontProps * sizeof(XFontProp); + fs->properties = Xmalloc (pbytes); + } + if (! fs->properties) { + Xfree(fs); + _XEatDataWords(dpy, reply_left); + return (XFontStruct *)NULL; + } + _XRead32 (dpy, (long *)fs->properties, nbytes); + reply_left -= (nbytes >> 2); + } + /* + * If no characters in font, then it is a bad font, but + * shouldn't try to read nothing. + */ + fs->per_char = NULL; + if (reply.nCharInfos > 0){ + /* nCharInfos is a CARD32 */ + if (reply.nCharInfos < (INT_MAX / sizeof(XCharStruct))) { + nbytes = reply.nCharInfos * SIZEOF(xCharInfo); + if ((nbytes >> 2) <= reply_left) { + size_t cibytes = reply.nCharInfos * sizeof(XCharStruct); + fs->per_char = Xmalloc (cibytes); + } + } + if (! fs->per_char) { + Xfree(fs->properties); + Xfree(fs); + _XEatDataWords(dpy, reply_left); + return (XFontStruct *)NULL; + } + + _XRead16 (dpy, (char *)fs->per_char, nbytes); + } + + /* call out to any extensions interested */ + for (ext = dpy->ext_procs; ext; ext = ext->next) + if (ext->create_Font) (*ext->create_Font)(dpy, fs, &ext->codes); + return fs; +} + +#ifdef USE_XF86BIGFONT + +/* Magic cookie for finding the right XExtData structure on the display's + extension list. */ +static int XF86BigfontNumber = 1040697125; + +static int +_XF86BigfontFreeCodes ( + XExtData *extension) +{ + /* Don't Xfree(extension->private_data) because it is on the same malloc + chunk as extension. */ + /* Don't Xfree(extension->private_data->codes) because this is shared with + the display's ext_procs list. */ + return 0; +} + +static XF86BigfontCodes * +_XF86BigfontCodes ( + register Display *dpy) +{ + XEDataObject dpy_union; + XExtData *pData; + XF86BigfontCodes *pCodes; + char *envval; + + dpy_union.display = dpy; + + /* If the server is known to support the XF86Bigfont extension, + * return the extension codes. If the server is known to not support + * the extension, don't bother checking again. + */ + pData = XFindOnExtensionList(XEHeadOfExtensionList(dpy_union), + XF86BigfontNumber); + if (pData) + return (XF86BigfontCodes *) pData->private_data; + + pData = Xmalloc(sizeof(XExtData) + sizeof(XF86BigfontCodes)); + if (!pData) { + /* Out of luck. */ + return (XF86BigfontCodes *) NULL; + } + + /* See if the server supports the XF86Bigfont extension. */ + envval = getenv("XF86BIGFONT_DISABLE"); /* Let the user disable it. */ + if (envval != NULL && envval[0] != '\0') + pCodes = NULL; + else { + XExtCodes *codes = XInitExtension(dpy, XF86BIGFONTNAME); + if (codes == NULL) + pCodes = NULL; + else { + pCodes = (XF86BigfontCodes *) &pData[1]; + pCodes->codes = codes; + } + } + pData->number = XF86BigfontNumber; + pData->private_data = (XPointer) pCodes; + pData->free_private = _XF86BigfontFreeCodes; + XAddToExtensionList(XEHeadOfExtensionList(dpy_union), pData); + if (pCodes) { + int result; + + /* See if the server supports the XF86BigfontQueryFont request. */ + xXF86BigfontQueryVersionReply reply; + register xXF86BigfontQueryVersionReq *req; + + LockDisplay(dpy); + + GetReq(XF86BigfontQueryVersion, req); + req->reqType = pCodes->codes->major_opcode; + req->xf86bigfontReqType = X_XF86BigfontQueryVersion; + + result = _XReply (dpy, (xReply *) &reply, + (SIZEOF(xXF86BigfontQueryVersionReply) - SIZEOF(xReply)) >> 2, + xFalse); + + UnlockDisplay(dpy); + SyncHandle(); + + if(!result) + goto ignore_extension; + + /* No need to provide backward compatibility with version 1.0. It + was never widely distributed. */ + if (!(reply.majorVersion > 1 + || (reply.majorVersion == 1 && reply.minorVersion >= 1))) + goto ignore_extension; + + pCodes->serverSignature = reply.signature; + pCodes->serverCapabilities = reply.capabilities; + } + return pCodes; + + ignore_extension: + /* No need to Xfree(pCodes) or Xfree(pCodes->codes), see + _XF86BigfontFreeCodes comment. */ + pCodes = (XF86BigfontCodes *) NULL; + pData->private_data = (XPointer) pCodes; + return pCodes; +} + +static int +_XF86BigfontFreeNop ( + XExtData *extension) +{ + return 0; +} + +static XFontStruct * +_XF86BigfontQueryFont ( + register Display *dpy, + XF86BigfontCodes *extcodes, + Font fid, + unsigned long seq) +{ + register XFontStruct *fs; + unsigned long nbytes; + unsigned long reply_left; /* unused data left in reply buffer */ + xXF86BigfontQueryFontReply reply; + register xXF86BigfontQueryFontReq *req; + register _XExtension *ext; + _XAsyncHandler async1; + _XAsyncErrorState async1_state; + _XAsyncHandler async2; + _XAsyncErrorState async2_state; + + if (seq) { + async1_state.min_sequence_number = seq; + async1_state.max_sequence_number = seq; + async1_state.error_code = BadName; + async1_state.major_opcode = X_OpenFont; + async1_state.minor_opcode = 0; + async1_state.error_count = 0; + async1.next = dpy->async_handlers; + async1.handler = _XAsyncErrorHandler; + async1.data = (XPointer)&async1_state; + dpy->async_handlers = &async1; + } + + GetReq(XF86BigfontQueryFont, req); + req->reqType = extcodes->codes->major_opcode; + req->xf86bigfontReqType = X_XF86BigfontQueryFont; + req->id = fid; + req->flags = (extcodes->serverCapabilities & XF86Bigfont_CAP_LocalShm + ? XF86Bigfont_FLAGS_Shm : 0); + + /* The function _XQueryFont benefits from a "magic" error handler for + BadFont coming from a X_QueryFont request. (See function _XReply.) + We have to establish an error handler ourselves. */ + async2_state.min_sequence_number = dpy->request; + async2_state.max_sequence_number = dpy->request; + async2_state.error_code = BadFont; + async2_state.major_opcode = extcodes->codes->major_opcode; + async2_state.minor_opcode = X_XF86BigfontQueryFont; + async2_state.error_count = 0; + async2.next = dpy->async_handlers; + async2.handler = _XAsyncErrorHandler; + async2.data = (XPointer)&async2_state; + dpy->async_handlers = &async2; + + if (!_XReply (dpy, (xReply *) &reply, + ((SIZEOF(xXF86BigfontQueryFontReply) - SIZEOF(xReply)) >> 2), xFalse)) { + DeqAsyncHandler(dpy, &async2); + if (seq) + DeqAsyncHandler(dpy, &async1); + return (XFontStruct *)NULL; + } + DeqAsyncHandler(dpy, &async2); + if (seq) + DeqAsyncHandler(dpy, &async1); + reply_left = reply.length - + ((SIZEOF(xXF86BigfontQueryFontReply) - SIZEOF(xReply)) >> 2); + if (! (fs = Xmalloc (sizeof (XFontStruct)))) { + _XEatDataWords(dpy, reply_left); + return (XFontStruct *)NULL; + } + fs->ext_data = NULL; + fs->fid = fid; + fs->direction = reply.drawDirection; + fs->min_char_or_byte2 = reply.minCharOrByte2; + fs->max_char_or_byte2 = reply.maxCharOrByte2; + fs->min_byte1 = reply.minByte1; + fs->max_byte1 = reply.maxByte1; + fs->default_char = reply.defaultChar; + fs->all_chars_exist = reply.allCharsExist; + fs->ascent = cvtINT16toInt (reply.fontAscent); + fs->descent = cvtINT16toInt (reply.fontDescent); + + /* XXX the next two statements won't work if short isn't 16 bits */ + fs->min_bounds = * (XCharStruct *) &reply.minBounds; + fs->max_bounds = * (XCharStruct *) &reply.maxBounds; + + fs->n_properties = reply.nFontProps; + /* + * if no properties defined for the font, then it is bad + * font, but shouldn't try to read nothing. + */ + fs->properties = NULL; + if (fs->n_properties > 0) { + /* nFontProps is a CARD16 */ + nbytes = reply.nFontProps * SIZEOF(xFontProp); + if ((nbytes >> 2) <= reply_left) { + size_t pbytes = reply.nFontProps * sizeof(XFontProp); + fs->properties = Xmalloc (pbytes); + } + if (! fs->properties) { + Xfree(fs); + _XEatDataWords(dpy, reply_left); + return (XFontStruct *)NULL; + } + _XRead32 (dpy, (long *)fs->properties, nbytes); + reply_left -= (nbytes >> 2); + } + + fs->per_char = NULL; +#ifndef LONG64 + /* compares each part to half the maximum, which should be far more than + any real font needs, so the combined total doesn't overflow either */ + if (reply.nUniqCharInfos > ((ULONG_MAX / 2) / SIZEOF(xCharInfo)) || + reply.nCharInfos > ((ULONG_MAX / 2) / sizeof(CARD16))) { + Xfree(fs->properties); + Xfree(fs); + _XEatDataWords(dpy, reply_left); + return (XFontStruct *)NULL; + } +#endif + if (reply.nCharInfos > 0) { + /* fprintf(stderr, "received font metrics, nCharInfos = %d, nUniqCharInfos = %d, shmid = %d\n", reply.nCharInfos, reply.nUniqCharInfos, reply.shmid); */ + if (reply.shmid == (CARD32)(-1)) { + xCharInfo* pUniqCI; + CARD16* pIndex2UniqIndex; + int i; + + nbytes = reply.nUniqCharInfos * SIZEOF(xCharInfo) + + (reply.nCharInfos+1)/2 * 2 * sizeof(CARD16); + pUniqCI = Xmalloc (nbytes); + if (!pUniqCI) { + Xfree(fs->properties); + Xfree(fs); + _XEatDataWords(dpy, reply_left); + return (XFontStruct *)NULL; + } + if (! (fs->per_char = Xmalloc (reply.nCharInfos * sizeof(XCharStruct)))) { + Xfree(pUniqCI); + Xfree(fs->properties); + Xfree(fs); + _XEatDataWords(dpy, reply_left); + return (XFontStruct *)NULL; + } + _XRead16 (dpy, (char *) pUniqCI, nbytes); + pIndex2UniqIndex = (CARD16*) (pUniqCI + reply.nUniqCharInfos); + for (i = 0; i < reply.nCharInfos; i++) { + if (pIndex2UniqIndex[i] >= reply.nUniqCharInfos) { + fprintf(stderr, "_XF86BigfontQueryFont: server returned wrong data\n"); + Xfree(pUniqCI); + Xfree(fs->properties); + Xfree(fs); + return (XFontStruct *)NULL; + } + /* XXX the next statement won't work if short isn't 16 bits */ + fs->per_char[i] = * (XCharStruct *) &pUniqCI[pIndex2UniqIndex[i]]; + } + Xfree(pUniqCI); + } else { +#ifdef HAS_SHM + XExtData *pData; + XEDataObject fs_union; + char *addr; + + pData = Xmalloc(sizeof(XExtData)); + if (!pData) { + Xfree(fs->properties); + Xfree(fs); + return (XFontStruct *)NULL; + } + + /* In some cases (e.g. an ssh daemon forwarding an X session to + a remote machine) it is possible that the X server thinks we + are running on the same machine (because getpeername() and + LocalClient() cannot know about the forwarding) but we are + not really local. Therefore, when we attach the first shared + memory segment, we verify that we are on the same machine as + the X server by checking that 1. shmat() succeeds, 2. the + segment has a sufficient size, 3. it contains the X server's + signature. Then we set the CAP_VerifiedLocal bit to indicate + the verification was successful. */ + + if ((addr = shmat(reply.shmid, NULL, SHM_RDONLY)) == (char *)-1) { + if (extcodes->serverCapabilities & CAP_VerifiedLocal) + fprintf(stderr, "_XF86BigfontQueryFont: could not attach shm segment\n"); + Xfree(pData); + Xfree(fs->properties); + Xfree(fs); + /* Stop requesting shared memory transport from now on. */ + extcodes->serverCapabilities &= ~ XF86Bigfont_CAP_LocalShm; + return (XFontStruct *)NULL; + } + + if (!(extcodes->serverCapabilities & CAP_VerifiedLocal)) { + struct shmid_ds buf; + if (!(shmctl(reply.shmid, IPC_STAT, &buf) >= 0 + && reply.nCharInfos < (INT_MAX / sizeof(XCharStruct)) + && buf.shm_segsz >= reply.shmsegoffset + reply.nCharInfos * sizeof(XCharStruct) + sizeof(CARD32) + && *(CARD32 *)(addr + reply.shmsegoffset + reply.nCharInfos * sizeof(XCharStruct)) == extcodes->serverSignature)) { + shmdt(addr); + Xfree(pData); + Xfree(fs->properties); + Xfree(fs); + /* Stop requesting shared memory transport from now on. */ + extcodes->serverCapabilities &= ~ XF86Bigfont_CAP_LocalShm; + return (XFontStruct *)NULL; + } + extcodes->serverCapabilities |= CAP_VerifiedLocal; + } + + pData->number = XF86BigfontNumber; + pData->private_data = (XPointer) addr; + pData->free_private = _XF86BigfontFreeNop; + fs_union.font = fs; + XAddToExtensionList(XEHeadOfExtensionList(fs_union), pData); + + fs->per_char = (XCharStruct *) (addr + reply.shmsegoffset); +#else + fprintf(stderr, "_XF86BigfontQueryFont: try recompiling libX11 with HasShm, Xserver has shm support\n"); + if (fs->properties) Xfree(fs->properties); + Xfree(fs); + /* Stop requesting shared memory transport from now on. */ + extcodes->serverCapabilities &= ~ XF86Bigfont_CAP_LocalShm; + return (XFontStruct *)NULL; +#endif + } + } + + /* call out to any extensions interested */ + for (ext = dpy->ext_procs; ext; ext = ext->next) + if (ext->create_Font) (*ext->create_Font)(dpy, fs, &ext->codes); + return fs; +} + +void +_XF86BigfontFreeFontMetrics (XFontStruct *fs) +{ +#ifdef HAS_SHM + XExtData *pData; + XEDataObject fs_union; + + fs_union.font = fs; + if ((pData = XFindOnExtensionList(XEHeadOfExtensionList(fs_union), + XF86BigfontNumber))) + shmdt ((char *) pData->private_data); + else + Xfree (fs->per_char); +#else + Xfree (fs->per_char); +#endif +} + +#endif /* USE_XF86BIGFONT */ + +int _XF86LoadQueryLocaleFont( + Display *dpy, + _Xconst char *name, + XFontStruct **xfp, + Font *fidp) +{ + int l; + const char *charset, *p; + char buf[256]; + XFontStruct *fs; + XLCd lcd; + + if (!name) + return 0; + l = strlen(name); + if (l < 2 || name[l - 1] != '*' || name[l - 2] != '-') + return 0; + charset = NULL; + /* next three lines stolen from _XkbGetCharset() */ + lcd = _XlcCurrentLC(); + if ((lcd = _XlcCurrentLC()) != 0) + charset = XLC_PUBLIC(lcd, encoding_name); + if (!charset || (p = strrchr(charset, '-')) == 0 || p == charset || p[1] == 0 || (p[1] == '*' && p[2] == 0)) { + /* prefer latin1 if no encoding found */ + charset = "ISO8859-1"; + p = charset + 7; + } + if (l - 2 - (p - charset) < 0) + return 0; + if (_XlcNCompareISOLatin1(name + l - 2 - (p - charset), charset, p - charset)) + return 0; + if (strlen(p + 1) + l - 1 >= sizeof(buf) - 1) + return 0; + strcpy(buf, name); + strcpy(buf + l - 1, p + 1); + fs = XLoadQueryFont(dpy, buf); + if (!fs) + return 0; + if (xfp) { + *xfp = fs; + if (fidp) + *fidp = fs->fid; + } else if (fidp) { + if (fs->per_char) { +#ifdef USE_XF86BIGFONT + _XF86BigfontFreeFontMetrics(fs); +#else + Xfree (fs->per_char); +#endif + } + _XFreeExtData(fs->ext_data); + + Xfree (fs->properties); + *fidp = fs->fid; + Xfree (fs); + } else { + XFreeFont(dpy, fs); + } + return 1; +} |