kenm@dmssyd.syd.dms.CSIRO.AU (Ken McNamara) (02/22/91)
I've written a small programme in attempt to create
a widget with a window which is not of the default visual type.
The code was written, compiled and run on a Sun 4/110 under SunOS 4.1.
It doesn't bomb when the display is a Sun 4 running the MIT sample
X server or a DECSTATION5000/200 with an 8 bit display running the
DECWINDOWS DigitalEquipmentCorporation UWS2.2 server but it does bomb
on a DECSTATION5000/200 running the UWS2.2 X-server with the following message
X Error of failed request: BadMatch (invalid parameter attributes)
Major opcode of failed request: 1 (X_CreateWindow)
Minor opcode of failed request: 0
Resource id in failed request: 0x80071
Serial number of failed request: 270
Current serial number in output stream: 279
I was just wondering if anyone has experienced this problem ?
The programme is :
-------------------------------------------------------------------------------
#include <stdio.h>
#include <X11/Xlib.h>
#include <X11/Intrinsic.h>
#include <X11/Xaw/Label.h>
#include <X11/StringDefs.h>
#include <X11/Shell.h>
#include <X11/Xatom.h>
#include <X11/Xmu/StdCmap.h>
static char *vis_class[6]; /* A table of Visual class names */
/* Routine to display a XVisulaInfo structure */
static void show_visual(vis)
XVisualInfo vis ;
{
int class;
printf ("depth = %d\n",vis.depth);
class = vis.class;
if (class >= 6) exit(1);
printf("Visual Id = %#x \n",vis.visualid);
printf ("class = %s\n",vis_class[class]);
printf ("R mask = %#x \n",vis.red_mask);
printf ("G mask = %#x \n",vis.green_mask);
printf ("B mask = %#x \n",vis.blue_mask);
printf ("colormap size = %d\n",vis.colormap_size);
printf ("bits per rgb = %d\n",vis.bits_per_rgb);
printf ("\n");
}
main(argc,argv)
int argc;
char ** argv;
{
Widget shell;
Widget box;
Colormap Col1 ;
XtAppContext app_context;
Display * displ ;
XVisualInfo Vis;
Window w;
Screen * scr;
XColor col;
int i,count;
/* Initialise table of Visual class names */
vis_class[GrayScale] = "GrayScale";
vis_class[StaticGray] = "StaticGray";
vis_class[PseudoColor] = "PseudoColor";
vis_class[StaticColor] = "StaticColor";
vis_class[DirectColor] = "DirectColor";
vis_class[TrueColor] = "TrueColor" ;
/* Do Xt stuff */
XtToolkitInitialize();
app_context = XtCreateApplicationContext();
/* Get display connection */
displ = XtOpenDisplay(app_context,"","Freddy","TESTS",
NULL,0,&argc,argv);
scr = DefaultScreenOfDisplay(displ);
w = RootWindow(displ,DefaultScreen(displ));
i =XMatchVisualInfo(displ,DefaultScreen(displ),8,GrayScale,&Vis);
printf("%d \n",i);
if ( !i ) exit (0); /* Failed - exit without further comment */
show_visual(Vis); /* Display the XVisualInfo returned */
Col1 = XCreateColormap(displ,w,Vis.visual,
AllocAll); /* Create the colormap */
printf("%#x \n",Col1);
/* This is just a bit of nonsense to check that the coloramp is
installed - when we enter the window the screen changes color */
for ( count=0; count<Vis.colormap_size; count++)
{
col.green = 65000 ; col.red =65000 ; col.blue = 65000;
col.pixel = count;
col.flags = DoGreen | DoBlue | DoRed;
XStoreColor(displ,Col1,&col);
};
/* Create a shell using the recently created colormap
and the Visual */
shell = XtVaAppCreateShell("Freddy","TESTS",topLevelShellWidgetClass,
displ,
XtNvisual,(XtArgVal)Vis.visual,
XtNwidth,(XtArgVal)100,
XtNheight,(XtArgVal)100,
XtNcolormap,(XtArgVal)Col1,
NULL);
/* Create a label widget */
box = XtVaCreateManagedWidget("MyLabel",labelWidgetClass,shell,
XtNlabel,(XtArgVal)"Hello",
NULL);
XtRealizeWidget(shell); /* Create the windows */
XtAppMainLoop(app_context); /* The Main Events */
}
------------------------------------------------------------------------
---------
The complete output is:
1
depth = 8
Visual Id = 0x80065
class = GrayScale
R mask = 0
G mask = 0
B mask = 0
colormap size = 256
bits per rgb = 8
0x900001
X Error of failed request: BadMatch (invalid parameter attributes)
Major opcode of failed request: 1 (X_CreateWindow)
Minor opcode of failed request: 0
Resource id in failed request: 0x80071
Serial number of failed request: 270
Current serial number in output stream: 279
--------------------------------
Ken McNamara
Phone: +61-2-4137063 (GMT+10)
Fax: +61-2-4169317
Internet: kenm@syd.dms.csiro.au
CSIRO Division of Mathematics & Statistics
PO Box 218, Lindfield, NSW 2070, Australia.