Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sdd.hp.com!wuarchive!bcm!etaylor
From: etaylor@wilkins.iaims.bcm.tmc.edu (Eric Taylor)
Newsgroups: comp.windows.x
Subject: Re: X Protocol Error?
Keywords: BackgroundPixmap, XChangeWindowAttributes
Message-ID: <3203@gazette.bcm.tmc.edu>
Date: 14 Dec 90 18:50:18 GMT
References: <1050@sppy00.UUCP>
Sender: usenet@bcm.tmc.edu
Reply-To: etaylor@wilkins.iaims.bcm.tmc.edu (Eric Taylor)
Organization: Baylor College of Medicine, Houston, Tx
Lines: 73
Nntp-Posting-Host: wilkins.iaims.bcm.tmc.edu


In article <1050@sppy00.UUCP>, jxf@sppy00.UUCP (Jonathan Fausey) writes:
|> 
|> I have encountered an Xlib programming problem that I am unable to resolve.
|> Namely, the code below compiles on a Sparcstation 1 (R3), a NeXT (R3), a Mac
|> IIx (A/UX & R4), a DG AViiON (R3), and a Sun 3/50 (R3), runs (as a client on
|> any of these machines) under the X servers on the NeXT, Mac, and Sun 3/50, but
|> generates an X protocol error on the others' X servers as well as on a PC X
|> server.  The X protocol error I get is:
|> 
|> X Protocol error:  BadMatch, invalid parameter attributes
|>   Major opcode of failed request:  1 (X_CreateWindow)
|> XSetErrorHandle  Minor opcode of failed request:  1
|>   Resource id in failed request:  0x8006c
|>   Serial number of failed request:  82
|>   Current serial number in output stream:  85
|> 
|> Here's (portions of) the code:
|> 
|>   Display              *wndw_disp;
|>   int                   wndw_screen;
|>   Visual               *visual;
|>   XSetWindowAttributes  WinAttr;
|>   unsigned long         WinAttrMask = CWBackPixmap;
|>   Window                win;
|>   Window                wndw_hndl;
|>   Pixmap                pix;
|>   .
|>   .
|>   .
|>   if (!(wndw_disp = XOpenDisplay("")))
|>   {
|>      printf("Can't connect to X server %s\n", XDisplayName(""));
|>      exit(-1);
|>   }
|> 
|>   wndw_screen = DefaultScreen(wndw_disp);
|>   wndw_hndl = XCreateSimpleWindow(wndw_disp,
|>                                DefaultRootWindow(wndw_disp),
|>                                wndw_hint.x, wndw_hint.y, wndw_hint.width,
|>                                wndw_hint.height,
|>                                border_w, wndw_foregrnd, wndw_backgrnd);
|>   XSetStandardProperties(wndw_disp, *wndw_hndl, test_str, cur_title_str,
|>                          None, argv, argc, &wndw_hint);
|>   .
|>   .
|>   .
|>   pix = XCreateBitmapFromData(wndw_disp, wndw_hndl,
|>                               RawBitmapData, NumBitsPerBitmapLine,
|>                               NumLinesInBitmap);
|>   WinAttr.background_pixmap = pix;
|>   win = XCreateWindow(wndw_disp, DefaultRootWindow(wndw_disp),
|>                            ulx, uly, width, height, 4, 1, InputOutput,
|>                            DefaultVisual(wndw_disp,wndw_screen), WinAttrMask,
|>                            &WinAttr);
|> 
|> I get a similar X protocol error message when I use XCreateSimpleWindow and
|> XSetBackgroundPixmap instead of XCreateWindow etc.  Can some kind soul help?


One glaring error is that you are assuming 1 bit deep display.
You specify depth 1 for your window depth.  Use DefaultDepth(wndw_disp,wndw_screen)
instead.

Another error:  You are using XCreateBitmapFromData.  You should be
using XCreatePixmapFromBitmapData.  As a rule, bitmaps are not
suitable as background pixmaps.  (There are situations where you want
them, but this is not one)
--
					Eric Taylor
					Baylor College of Medicine
					etaylor@wilkins.bcm.tmc.edu
					(713) 798-3776