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Diffstat (limited to 'nx-X11/programs/Xserver/hw/dmx/dmxfont.c')
-rw-r--r--nx-X11/programs/Xserver/hw/dmx/dmxfont.c559
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diff --git a/nx-X11/programs/Xserver/hw/dmx/dmxfont.c b/nx-X11/programs/Xserver/hw/dmx/dmxfont.c
new file mode 100644
index 000000000..3dba61de4
--- /dev/null
+++ b/nx-X11/programs/Xserver/hw/dmx/dmxfont.c
@@ -0,0 +1,559 @@
+/* $XFree86$ */
+/*
+ * Copyright 2001-2004 Red Hat Inc., Durham, North Carolina.
+ *
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation on the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) 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
+ * NON-INFRINGEMENT. IN NO EVENT SHALL RED HAT AND/OR THEIR SUPPLIERS
+ * 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.
+ */
+
+/*
+ * Authors:
+ * Kevin E. Martin <kem@redhat.com>
+ *
+ */
+
+/** \file
+ * This file provides support for fonts. */
+
+#ifdef HAVE_DMX_CONFIG_H
+#include <dmx-config.h>
+#endif
+
+#define DMX_FONTPATH_DEBUG 0
+
+#include "dmx.h"
+#include "dmxsync.h"
+#include "dmxfont.h"
+#include "dmxlog.h"
+
+#include <X11/fonts/fontstruct.h>
+#include "dixfont.h"
+#include "dixstruct.h"
+
+static int (*dmxSaveProcVector[256])(ClientPtr);
+static int dmxFontLastError;
+
+static int dmxFontErrorHandler(Display *dpy, XErrorEvent *ev)
+{
+ dmxFontLastError = ev->error_code;
+
+ return 0;
+}
+
+static char **dmxGetFontPath(int *npaths)
+{
+ char **fp;
+ unsigned char *c, *paths;
+ char *newfp;
+ int len, l, i;
+
+ paths = GetFontPath(npaths, &len);
+
+ newfp = xalloc(*npaths + len);
+ c = (unsigned char *)newfp;
+ fp = xalloc(*npaths * sizeof(*fp));
+
+ memmove(newfp, paths+1, *npaths + len - 1);
+ l = *paths;
+ for (i = 0; i < *npaths; i++) {
+ fp[i] = (char *)c;
+ c += l;
+ l = *c;
+ *c++ = '\0';
+ }
+
+#if DMX_FONTPATH_DEBUG
+ for (i = 0; i < *npaths; i++)
+ dmxLog(dmxDebug, "FontPath[%d] = %s\n", i, fp[i]);
+#endif
+
+ return fp;
+}
+
+static void dmxFreeFontPath(char **fp)
+{
+ xfree(fp[0]);
+ xfree(fp);
+}
+
+static Bool dmxCheckFontPathElement(DMXScreenInfo *dmxScreen, char *fp)
+{
+ int (*oldErrorHandler)(Display *, XErrorEvent *);
+
+ if (!dmxScreen->beDisplay)
+ return TRUE;
+
+ dmxFontLastError = 0;
+ oldErrorHandler = XSetErrorHandler(dmxFontErrorHandler);
+ XSetFontPath(dmxScreen->beDisplay, &fp, 1);
+ dmxSync(dmxScreen, TRUE); /* Must complete before removing handler */
+ XSetErrorHandler(oldErrorHandler);
+
+ return (dmxFontLastError == 0);
+}
+
+static int dmxSetFontPath(DMXScreenInfo *dmxScreen)
+{
+ int (*oldErrorHandler)(Display *, XErrorEvent *);
+ char **fp;
+ int result = Success;
+ int npaths;
+
+ if (!dmxScreen->beDisplay)
+ return result;
+
+ fp = dmxGetFontPath(&npaths);
+ if (!fp) return BadAlloc;
+
+ dmxFontLastError = 0;
+ oldErrorHandler = XSetErrorHandler(dmxFontErrorHandler);
+ XSetFontPath(dmxScreen->beDisplay, fp, npaths);
+ dmxSync(dmxScreen, TRUE); /* Must complete before removing handler */
+ XSetErrorHandler(oldErrorHandler);
+
+ if (dmxFontLastError) {
+ result = dmxFontLastError;
+ /* We could set *error here to the offending path, but it is
+ * ignored, so we don't bother figuring out which path is bad.
+ * If we do add this support in the future, we'll need to add
+ * error to the function's argument list.
+ */
+ }
+
+ dmxFreeFontPath(fp);
+
+ return result;
+}
+
+static int dmxCheckFontPath(DMXScreenInfo *dmxScreen, int *error)
+{
+ char **oldFontPath;
+ int nOldPaths;
+ int result = Success;
+
+ if (!dmxScreen->beDisplay)
+ return result;
+
+ /* Save old font path */
+ oldFontPath = XGetFontPath(dmxScreen->beDisplay, &nOldPaths);
+
+ result = dmxSetFontPath(dmxScreen);
+
+ /* Restore old font path */
+ XSetFontPath(dmxScreen->beDisplay, oldFontPath, nOldPaths);
+ XFreeFontPath(oldFontPath);
+ dmxSync(dmxScreen, FALSE);
+
+ return result;
+}
+
+static int dmxProcSetFontPath(ClientPtr client)
+{
+ unsigned char *ptr;
+ unsigned long nbytes, total, n;
+ long nfonts;
+ int i, result;
+ int error;
+ unsigned char *oldFontPath, *tmpFontPath;
+ int nOldPaths;
+ int lenOldPaths;
+ REQUEST(xSetFontPathReq);
+
+ REQUEST_AT_LEAST_SIZE(xSetFontPathReq);
+
+ nbytes = (client->req_len << 2) - sizeof(xSetFontPathReq);
+ total = nbytes;
+ ptr = (unsigned char *)&stuff[1];
+ nfonts = stuff->nFonts;
+
+ while (--nfonts >= 0) {
+ if ((total == 0) || (total < (n = (*ptr + 1))))
+ return BadLength;
+ total -= n;
+ ptr += n;
+ }
+ if (total >= 4)
+ return BadLength;
+
+ tmpFontPath = GetFontPath(&nOldPaths, &lenOldPaths);
+ oldFontPath = xalloc(nOldPaths + lenOldPaths);
+ memmove(oldFontPath, tmpFontPath, nOldPaths + lenOldPaths);
+
+ result = SetFontPath(client, stuff->nFonts, (unsigned char *)&stuff[1],
+ &error);
+ if (!result) {
+ for (i = 0; i < dmxNumScreens; i++)
+ if ((result = dmxCheckFontPath(&dmxScreens[i], &error)))
+ break;
+
+ if (result) {
+ int ignoreresult, ignoreerror;
+
+ /* Restore old fontpath in the DMX server */
+ ignoreresult = SetFontPath(client, nOldPaths, oldFontPath,
+ &ignoreerror);
+ } else {
+ result = client->noClientException;
+ client->errorValue = error;
+ }
+ }
+
+ xfree(oldFontPath);
+ return result;
+}
+
+/** Initialize font support. In addition to the screen function call
+ * pointers, DMX also hooks in at the ProcVector[] level. Here the old
+ * ProcVector function pointers are saved and the new ProcVector
+ * function pointers are initialized. */
+void dmxInitFonts(void)
+{
+ int i;
+
+ for (i = 0; i < 256; i++)
+ dmxSaveProcVector[i] = ProcVector[i];
+
+ ProcVector[X_SetFontPath] = dmxProcSetFontPath;
+}
+
+/** Reset font support by restoring the original ProcVector function
+ * pointers. */
+void dmxResetFonts(void)
+{
+ int i;
+
+ for (i = 0; i < 256; i++)
+ ProcVector[i] = dmxSaveProcVector[i];
+}
+
+/** Load the font, \a pFont, on the back-end server associated with \a
+ * pScreen. When a font is loaded, the font path on back-end server is
+ * first initialized to that specified on the command line with the
+ * -fontpath options, and then the font is loaded. */
+Bool dmxBELoadFont(ScreenPtr pScreen, FontPtr pFont)
+{
+ DMXScreenInfo *dmxScreen = &dmxScreens[pScreen->myNum];
+ dmxFontPrivPtr pFontPriv = FontGetPrivate(pFont, dmxFontPrivateIndex);
+ char *name;
+ char **oldFontPath = NULL;
+ int nOldPaths;
+ Atom name_atom, value_atom;
+ int i;
+
+ /* Make sure we have a font private struct to work with */
+ if (!pFontPriv)
+ return FALSE;
+
+ /* Don't load a font over top of itself */
+ if (pFontPriv->font[pScreen->myNum]) {
+ return TRUE; /* Already loaded font */
+ }
+
+ /* Save old font path */
+ oldFontPath = XGetFontPath(dmxScreen->beDisplay, &nOldPaths);
+
+ /* Set the font path for the font about to be loaded on the back-end */
+ if (dmxSetFontPath(dmxScreen)) {
+ char **fp;
+ int npaths;
+ Bool *goodfps;
+
+ /* This could fail only when first starting the X server and
+ * loading the default font. If it fails here, then the default
+ * font path is invalid, no default font path will be set, the
+ * DMX server will fail to load the default font, and it will
+ * exit with an error unless we remove the offending font paths
+ * with the -ignorebadfontpaths command line option.
+ */
+
+ fp = dmxGetFontPath(&npaths);
+ if (!fp) {
+ dmxLog(dmxError,
+ "No default font path set.\n");
+ dmxLog(dmxError,
+ "Please see the Xdmx man page for information on how to\n");
+ dmxLog(dmxError,
+ "initialize the DMX server's default font path.\n");
+ XFreeFontPath(oldFontPath);
+ return FALSE;
+ }
+
+ if (!dmxFontPath)
+ dmxLog(dmxWarning, "No default font path is set.\n");
+
+ goodfps = xalloc(npaths * sizeof(*goodfps));
+
+ dmxLog(dmxError,
+ "The DMX server failed to set the following font paths on "
+ "screen #%d:\n", pScreen->myNum);
+
+ for (i = 0; i < npaths; i++)
+ if (!(goodfps[i] = dmxCheckFontPathElement(dmxScreen, fp[i])))
+ dmxLog(dmxError, " %s\n", fp[i]);
+
+ if (dmxIgnoreBadFontPaths) {
+ char *newfp;
+ int newnpaths = 0;
+ int len = 0;
+ int j = 0;
+ int error;
+
+ dmxLog(dmxError,
+ "These font paths will not be used because the "
+ "\"-ignorebadfontpaths\"\n");
+ dmxLog(dmxError,
+ "option is set.\n");
+
+ for (i = 0; i < npaths; i++)
+ if (goodfps[i]) {
+ len += strlen(fp[i]) + 1;
+ newnpaths++;
+ }
+
+ if (!newnpaths) {
+ /* No valid font paths were found */
+ dmxLog(dmxError,
+ "After removing the font paths above, no valid font "
+ "paths were\n");
+ dmxLog(dmxError,
+ "available. Please check that the font paths set on "
+ "the command\n");
+ dmxLog(dmxError,
+ "line or in the configuration file via the "
+ "\"-fontpath\" option\n");
+ dmxLog(dmxError,
+ "are valid on all back-end servers. See the Xdmx man "
+ "page for\n");
+ dmxLog(dmxError,
+ "more information on font paths.\n");
+ dmxFreeFontPath(fp);
+ XFreeFontPath(oldFontPath);
+ xfree(goodfps);
+ return FALSE;
+ }
+
+ newfp = xalloc(len * sizeof(*newfp));
+ for (i = 0; i < npaths; i++) {
+ if (goodfps[i]) {
+ int n = strlen(fp[i]);
+ newfp[j++] = n;
+ strncpy(&newfp[j], fp[i], n);
+ j += n;
+ }
+ }
+
+ if (SetFontPath(NULL, newnpaths, (unsigned char *)newfp, &error)) {
+ /* Note that this should never happen since all of the
+ * FPEs were previously valid. */
+ dmxLog(dmxError, "Cannot reset the default font path.\n");
+ }
+ } else if (dmxFontPath) {
+ dmxLog(dmxError,
+ "Please remove these font paths from the command line "
+ "or\n");
+ dmxLog(dmxError,
+ "configuration file, or set the \"-ignorebadfontpaths\" "
+ "option to\n");
+ dmxLog(dmxError,
+ "ignore them. For more information on these options, see "
+ "the\n");
+ dmxLog(dmxError,
+ "Xdmx man page.\n");
+ } else {
+ dmxLog(dmxError,
+ "Please specify the font paths that are available on all "
+ "back-end\n");
+ dmxLog(dmxError,
+ "servers with the \"-fontpath\" option, or use the "
+ "\"-ignorebadfontpaths\"\n");
+ dmxLog(dmxError,
+ "to ignore bad defaults. For more information on "
+ "these and other\n");
+ dmxLog(dmxError,
+ "font-path-related options, see the Xdmx man page.\n");
+ }
+
+ if (!dmxIgnoreBadFontPaths ||
+ (dmxIgnoreBadFontPaths && dmxSetFontPath(dmxScreen))) {
+ /* We still have errors so return with error */
+ dmxFreeFontPath(fp);
+ XFreeFontPath(oldFontPath);
+ xfree(goodfps);
+ return FALSE;
+ }
+ }
+
+ /* Find requested font on back-end server */
+ name_atom = MakeAtom("FONT", 4, TRUE);
+ value_atom = 0L;
+
+ for (i = 0; i < pFont->info.nprops; i++) {
+ if ((Atom)pFont->info.props[i].name == name_atom) {
+ value_atom = pFont->info.props[i].value;
+ break;
+ }
+ }
+ if (!value_atom) return FALSE;
+
+ name = (char *)NameForAtom(value_atom);
+ if (!name) return FALSE;
+
+ pFontPriv->font[pScreen->myNum] =
+ XLoadQueryFont(dmxScreen->beDisplay, name);
+
+ /* Restore old font path */
+ XSetFontPath(dmxScreen->beDisplay, oldFontPath, nOldPaths);
+ XFreeFontPath(oldFontPath);
+ dmxSync(dmxScreen, FALSE);
+
+ if (!pFontPriv->font[pScreen->myNum]) return FALSE;
+
+ return TRUE;
+}
+
+/** Realize the font, \a pFont, on the back-end server associated with
+ * \a pScreen. */
+Bool dmxRealizeFont(ScreenPtr pScreen, FontPtr pFont)
+{
+ DMXScreenInfo *dmxScreen = &dmxScreens[pScreen->myNum];
+ dmxFontPrivPtr pFontPriv;
+
+ if (!(pFontPriv = FontGetPrivate(pFont, dmxFontPrivateIndex))) {
+ FontSetPrivate(pFont, dmxFontPrivateIndex, NULL);
+ pFontPriv = xalloc(sizeof(dmxFontPrivRec));
+ if (!pFontPriv) return FALSE;
+ pFontPriv->font = NULL;
+ MAXSCREENSALLOC(pFontPriv->font);
+ if (!pFontPriv->font) {
+ xfree(pFontPriv);
+ return FALSE;
+ }
+ pFontPriv->refcnt = 0;
+ }
+
+ FontSetPrivate(pFont, dmxFontPrivateIndex, (pointer)pFontPriv);
+
+ if (dmxScreen->beDisplay) {
+ if (!dmxBELoadFont(pScreen, pFont))
+ return FALSE;
+
+ pFontPriv->refcnt++;
+ } else {
+ pFontPriv->font[pScreen->myNum] = NULL;
+ }
+
+ return TRUE;
+}
+
+/** Free \a pFont on the back-end associated with \a pScreen. */
+Bool dmxBEFreeFont(ScreenPtr pScreen, FontPtr pFont)
+{
+ DMXScreenInfo *dmxScreen = &dmxScreens[pScreen->myNum];
+ dmxFontPrivPtr pFontPriv = FontGetPrivate(pFont, dmxFontPrivateIndex);
+
+ if (pFontPriv && pFontPriv->font[pScreen->myNum]) {
+ XFreeFont(dmxScreen->beDisplay, pFontPriv->font[pScreen->myNum]);
+ pFontPriv->font[pScreen->myNum] = NULL;
+ return TRUE;
+ }
+
+ return FALSE;
+}
+
+/** Unrealize the font, \a pFont, on the back-end server associated with
+ * \a pScreen. */
+Bool dmxUnrealizeFont(ScreenPtr pScreen, FontPtr pFont)
+{
+ DMXScreenInfo *dmxScreen = &dmxScreens[pScreen->myNum];
+ dmxFontPrivPtr pFontPriv;
+
+ if ((pFontPriv = FontGetPrivate(pFont, dmxFontPrivateIndex))) {
+ /* In case the font failed to load properly */
+ if (!pFontPriv->refcnt) {
+ MAXSCREENSFREE(pFontPriv->font);
+ xfree(pFontPriv);
+ FontSetPrivate(pFont, dmxFontPrivateIndex, NULL);
+ } else if (pFontPriv->font[pScreen->myNum]) {
+ if (dmxScreen->beDisplay)
+ dmxBEFreeFont(pScreen, pFont);
+
+ /* The code below is non-obvious, so here's an explanation...
+ *
+ * When creating the default GC, the server opens up the
+ * default font once for each screen, which in turn calls
+ * the RealizeFont function pointer once for each screen.
+ * During this process both dix's font refcnt and DMX's font
+ * refcnt are incremented once for each screen.
+ *
+ * Later, when shutting down the X server, dix shuts down
+ * each screen in reverse order. During this shutdown
+ * procedure, each screen's default GC is freed and then
+ * that screen is closed by calling the CloseScreen function
+ * pointer. screenInfo.numScreens is then decremented after
+ * closing each screen. This procedure means that the dix's
+ * font refcnt for the font used by the default GC's is
+ * decremented once for each screen # greater than 0.
+ * However, since dix's refcnt for the default font is not
+ * yet 0 for each screen greater than 0, no call to the
+ * UnrealizeFont function pointer is made for those screens.
+ * Then, when screen 0 is being closed, dix's font refcnt
+ * for the default GC's font is finally 0 and the font is
+ * unrealized. However, since screenInfo.numScreens has
+ * been decremented already down to 1, only one call to
+ * UnrealizeFont is made (for screen 0). Thus, even though
+ * RealizeFont was called once for each screen,
+ * UnrealizeFont is only called for screen 0.
+ *
+ * This is a bug in dix.
+ *
+ * To avoid the memory leak of pFontPriv for each server
+ * generation, we can also free pFontPriv if the refcnt is
+ * not yet 0 but the # of screens is 1 -- i.e., the case
+ * described in the dix bug above. This is only a temporary
+ * workaround until the bug in dix is solved.
+ *
+ * The other problem is that the font structure allocated by
+ * XLoadQueryFont() above is not freed for screens > 0.
+ * This problem cannot be worked around here since the back-
+ * end displays for screens > 0 have already been closed by
+ * the time this code is called from dix.
+ *
+ * When the bug in dix described above is fixed, then we can
+ * remove the "|| screenInfo.numScreens == 1" code below and
+ * the memory leaks will be eliminated.
+ */
+ if (--pFontPriv->refcnt == 0
+#if 1
+ /* Remove this code when the dix bug is fixed */
+ || screenInfo.numScreens == 1
+#endif
+ ) {
+ MAXSCREENSFREE(pFontPriv->font);
+ xfree(pFontPriv);
+ FontSetPrivate(pFont, dmxFontPrivateIndex, NULL);
+ }
+ }
+ }
+
+ return TRUE;
+}
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