XRenderCreatePicture

[Russell Shaw]

Hi,
XRenderCreatePicture() gives:

   (gdb) run
   X Error of failed request:  BadMatch (invalid parameter attributes)
     Major opcode of failed request:  153 (RENDER)
     Minor opcode of failed request:  4 (RenderCreatePicture)
     Serial number of failed request:  16
     Current serial number in output stream:  17

   Program exited with code 01.


This happens when setting a gdb/ddd breakpoint on "i = 1":
(Xorg 7.0.0 on debian-sid)


#include<stdlib.h>
#include<stdio.h>
#include<X11/Xlib.h>
#include<X11/extensions/Xrender.h>

int
main(int argc, char *argv[])
{
     char *displayname = ":0.0";
     Display *display = XOpenDisplay(displayname);

     XSynchronize(display, 1);

     int xrender_eventbase, xrender_errorbase;
     if(!XRenderQueryExtension(display, &xrender_eventbase, &xrender_errorbase)) {
         printf("Xrender extension is required, but not available.\n");
         exit(1);
     }

     int major = 0;
     int minor = 0;
     if(!XRenderQueryVersion(display, &major, &minor)) {
         printf("Error querying Xrender version.\n");
         exit(1);
     }

     XSetWindowAttributes values;
     values.background_pixel = WhitePixel(display, 0);

     Window window = XCreateWindow(display, RootWindow(display, 0), 0, 0, 100, 100, 0,
                                   DefaultDepth(display, 0), InputOutput, DefaultVisual(display, 0),
                                   CWBackPixel, &values);

     XMapWindow(display, window);

     XRenderPictFormat *pictformat = XRenderFindStandardFormat(display, PictStandardARGB32);

     XRenderPictureAttributes attributes;

     Picture picture = XRenderCreatePicture(display, window, pictformat, 0, &attributes);

     int i = 1;
}