Hello,
ImageMagick bug report
Platform: Linux, X11
Version: 6.0.7.1
We found that sometimes the "import" utility does not correctly handle
a hierarchy of subwindows under X11. First we have seen this with
windows using the OpenMotif NotePage widget. But it is easy to
reproduce with just a small window hierarchy. A small test program to
show the problem is attached. Please compile and run with
% cc -o wintree wintree.c -lX11
% ./wintree
Main Window = 0xc400001
A white window appears, and the main window's id is printed. Now run
the import utility as follows:
% import -frame -window <window-id> /tmp/wrong.png
With "display", you will see that import did include some garbage in
the generated PNG file.
% display /tmp/wrong.png
The reason for this is that the XGetWindowImage() function in
magick/xwindow.c does not correctly compute the bounds or crop
rectangles when descending the window hierarchy.
A patch would be appreciated.
Kind regards,
--
Andreas Luik
Barco Orthogon GmbH
Vaihinger Str. 169, D-70567 Stuttgart
Managing Directors / Geschaeftsfuehrer: Frank Timmermans, Klaus Kaltwasser
Place of Registration / Sitz: Bremen HRB 23374
Tel. +49-711-78 19 60-744 Fax +49-711-78 19 60-711
http://www.barco-orthogon.com
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#include <stdio.h>
#include <stdlib.h>
#include <X11/Xlib.h>
static struct {
int x;
int y;
unsigned int width;
unsigned int height;
unsigned int bw;
} winlist[] = {
{ 100, 100, 550, 528, 0 },
{ 0, 28, 550, 500, 0 },
{ 10, 10, 540, 340, 0 },
{ -540, -340, 540, 340, 0 },
{ 0, 190, 538, 114, 0 },
};
int main()
{
int i;
Display *dpy;
Window parent;
Window mainw;
Window w;
if ((dpy = XOpenDisplay(0)) == NULL) {
fprintf(stderr, "failed to open display\n");
exit(1);
}
parent = DefaultRootWindow(dpy);
for (i = 0; i < sizeof(winlist) / sizeof(winlist[0]); i++) {
w = XCreateSimpleWindow(dpy, parent,
winlist[i].x, winlist[i].y,
winlist[i].width, winlist[i].height,
winlist[i].bw,
BlackPixel(dpy, DefaultScreen(dpy)),
WhitePixel(dpy, DefaultScreen(dpy)));
parent = w;
if (i == 0) {
mainw = w;
XSelectInput(dpy, mainw, ButtonPressMask);
}
XMapWindow(dpy, w);
}
printf("Main Window = %#lx\n", mainw);
while (1) {
XEvent event;
XNextEvent(dpy, &event);
switch (event.type) {
case ButtonPress:
exit(0);
break;
}
}
}
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