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From: tclark@honir.cs.cornell.edu (Timothy Clark)
Newsgroups: comp.windows.x
Subject: problem with XLoadQueryFont on HPUX machines?
Message-ID: <45608@cornell.UUCP>
Date: 10 Sep 90 22:40:36 GMT
Sender: nobody@cornell.UUCP
Reply-To: tclark@cs.cornell.edu (Timothy Clark)
Distribution: comp
Organization: Cornell Univ. CS Dept, Ithaca NY
Lines: 70

I've run into a problem with a very basic program which runs fine on a Sun
sparcstation running X11.4, but blows up on an HPUX 7.0 machine running X11.3.

All I'm doing is opening a display, creating and setting a tile, then when I
call XLoadQueryFont ... kaboom!  The error is:

>X Protocol error detected by server:  BadMatch, invalid parameter attributes
>  Failed request major op code 56 (X_ChangeGC)
>  Failed request minor op code 0 (if applicable)
>  ResourceID 0x0 in failed request (if applicable)
>  Serial number of failed request 7
>  Current serial number in output stream 8

The program code follows:

#include "spread.h"

/* debug (synchronous) X mode switch, non-zero = on */
#define _Xdebug 1 

static char gray_bits[] = {
        0x5555, 0xaaaa, 0x5555, 0xaaaa, 
        0x5555, 0xaaaa, 0x5555, 0xaaaa, 
        0x5555, 0xaaaa, 0x5555, 0xaaaa,
        0x5555, 0xaaaa, 0x5555, 0xaaaa};


void
main (argc, argv)
int   argc;
char  **argv;
{
    char displayname[32];
    char *fontname;
    XFontStruct   *font_info;    

    gethostname (name, 19);
    for (namelen = 0; name[namelen] && name[namelen] != '.' && namelen < 18; namelen++)
        continue;
    name[namelen] = '\0';

    dpy = XOpenDisplay (displayname);
    if (dpy == (Display *)0) {
        printf("Unable to establish xwindow connection.\n");
        exit(0);
    }

    screen = DefaultScreen(dpy);
    gc = DefaultGC(dpy, screen);
    black = BlackPixel(dpy, screen);
    white = WhitePixel(dpy, screen);

    tile = XCreateBitmapFromData(dpy, RootWindow(dpy, screen), 
                                 gray_bits, gray_width, gray_height);

    XSetTile(dpy, gc, tile); 

    fontname = NORMALFONT;   /* #define NORMALFONT "8x13" */

    font_info = XLoadQueryFont(dpy, fontname);
    printf("no problem ... past XLoadQueryFont\n");

}

As I said, it works fine on Sun, but blows up on HP risc machines.  I have 
tried everything I can think of ... any help would be greatly appreciated.

--Tim

tclark@cs.cornell.edu