Hello,
I use Xm to create a spash screen and sometimes, this piece of code
aborts with :
X Error of failed request: BadFont (invalid Font parameter)
Major opcode of failed request: 55 (X_CreateGC)
Resource id in failed request: 0x0
Serial number of failed request: 14896
Current serial number in output stream: 14906
In this code, XtAPpPending() randomly triggers BadFont error. XCreateGC
is only called by XpmCreatePixmapFromData() (libXpm 3.5.12). I suppose I
have done a mistake but I don't understand my error.
All suggestions are welcome.
Best regards,
JB
Faulty code:
(of course, all variables are declared, complete source code is
available at
http://www.rpl2.fr/cgi-bin/cvsweb/rpl/src/encart.c?rev=1.66;content-type=text%2Fplain)
display = XOpenDisplay(NULL);
if (display != NULL)
{
objet_principal = XtVaOpenApplication(&app, "rpl",
NULL, 0, &argc, argv, NULL, overrideShellWidgetClass, NULL);
XSynchronize(XtDisplay(objet_principal), False);
old_message_handler = XtAppSetWarningHandler(app,_XtWarningHandler);
form = XtVaCreateManagedWidget("rplSplashScreen",
xmFormWidgetClass, objet_principal,
NULL);
XtVaGetValues(objet_principal,
XmNmwmDecorations, &decor,
XmNmwmFunctions, &fonctions,
NULL);
decor &= ~(MWM_DECOR_ALL + MWM_DECOR_MAXIMIZE + MWM_DECOR_RESIZEH
+ MWM_DECOR_TITLE + MWM_DECOR_MENU + MWM_DECOR_BORDER);
fonctions &= ~(MWM_FUNC_ALL + MWM_FUNC_RESIZE + MWM_FUNC_CLOSE
+ MWM_FUNC_MINIMIZE + MWM_FUNC_MAXIMIZE);
XtVaSetValues(objet_principal,
XmNmwmDecorations, decor,
XmNmwmFunctions, fonctions,
NULL);
cadre = XtVaCreateManagedWidget("rplExternalFrame",
xmFrameWidgetClass, form,
XmNtopAttachment, XmATTACH_FORM,
XmNbottomAttachment, XmATTACH_FORM,
XmNleftAttachment, XmATTACH_FORM,
XmNrightAttachment, XmATTACH_FORM,
XmNtopOffset, 5,
XmNleftOffset, 5,
XmNrightOffset, 5,
XmNbottomOffset, 5,
XmNmarginWidth, 5,
XmNmarginHeight, 5,
NULL);
if ((erreur = XpmCreatePixmapFromData(XtDisplay(form),
DefaultRootWindow(XtDisplay(form)), rpl_xpm,
&pixmap_rpl, &pixmap_rpl_masque, NULL)) != 0)
{
(*s_etat_processus).erreur_systeme = d_es_allocation_memoire;
return;
}
pixmap = XtVaCreateManagedWidget("rplPixmap",
xmLabelWidgetClass, cadre,
XmNlabelType, XmPIXMAP,
XmNlabelPixmap, pixmap_rpl,
NULL);
largeur = WidthOfScreen(XtScreen(form));
hauteur = HeightOfScreen(XtScreen(form));
offset_x = 0;
offset_y = 0;
sscanf(rpl_xpm[0], "%d %d", &largeur_xpm, &hauteur_xpm);
largeur_popup = (Position) (largeur_xpm + 28);
hauteur_popup = (Position) (hauteur_xpm + 28);
XtVaSetValues(objet_principal,
XmNx, offset_x + ((largeur - largeur_popup) / 2),
XmNy, offset_y + ((hauteur - hauteur_popup) / 2),
NULL);
XtRealizeWidget(objet_principal);
XFlush(XtDisplay(form));
attente.tv_sec = 0;
attente.tv_nsec = 1000;
gettimeofday(&horodatage_initial, NULL);
do
{
// XtAppPEnding randomly triggers BadFont error !
if (XtAppPending(app) != 0)
{
XtAppNextEvent(app, &evenement);
XtDispatchEvent(&evenement);
}
nanosleep(&attente, NULL);
gettimeofday(&horodatage_final, NULL);
temps_ecoule.tv_sec = horodatage_final.tv_sec
- horodatage_initial.tv_sec;
temps_ecoule.tv_usec = horodatage_final.tv_usec
- horodatage_initial.tv_usec;
if (temps_ecoule.tv_usec < 0)
{
temps_ecoule.tv_usec += 1000000;
temps_ecoule.tv_sec--;
}
} while (((((double) temps_ecoule.tv_usec) / ((double) 1000000))
< (((double) duree) / ((double) 1000000)));
XtUnrealizeWidget(objet_principal);
while(XtAppPending(app) == 0)
{
nanosleep(&attente, NULL);
}
while(XtAppPending(app) != 0)
{
XtAppNextEvent(app, &evenement);
XtDispatchEvent(&evenement);
nanosleep(&attente, NULL);
}
XtDestroyWidget(pixmap);
XtDestroyWidget(cadre);
XtDestroyWidget(form);
XtDestroyWidget(objet_principal);
XmDestroyPixmap(XtScreen(form), pixmap_rpl);
XmDestroyPixmap(XtScreen(form), pixmap_rpl_masque);
XtAppSetWarningHandler(app, old_message_handler);
XtDestroyApplicationContext(app);
XCloseDisplay(display);
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