Attachment 714610 Details for Bug 1021803

Test program with line width 1

x11lineend-width1.c (text/plain), 1.24 KB, created by Max Staudt on 2017-02-17 14:42:12 UTC

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Creator: Max Staudt

Created: 2017-02-17 14:42:12 UTC

Size: 1.24 KB

patch

obsolete

>#include <X11/Xlib.h>
>
>int main(){
> Display*  disp;
> int       defscreen;
> Window    win;
> Window    root;
> XGCValues gcvalues;
> GC        gc;
> ulong     black;
> ulong     white;
>
> disp = XOpenDisplay(NULL);
> defscreen = DefaultScreen(disp);
> root = RootWindow(disp,defscreen);
> black = BlackPixel(disp,defscreen);
> white = WhitePixel(disp,defscreen);
> win = XCreateSimpleWindow(disp,root,200,200,200,200,0,0,0);
> XMapWindow(disp,win);
>
> while (1) {
>  gc = XCreateGC(disp,win,0,&gcvalues);
>  XSetForeground(disp,gc,white);
>  XFillRectangle(disp,win,gc,0,0,200,200);
>  XSetForeground(disp,gc,black);
>  XSetLineAttributes(disp,gc,1,LineSolid,CapProjecting,JoinMiter);
>  XDrawLine(disp,win,gc,11,10,20,10);
>  XDrawLine(disp,win,gc,11,20,20,20);
>  XDrawLine(disp,win,gc,30,11,30,20);
>  XDrawLine(disp,win,gc,40,11,40,20);
>                                      //                      x  y
>  XDrawLine(disp,win,gc,10,20,10,10); //does not paint pixel 10,20
>  XDrawLine(disp,win,gc,40,10,30,10); //does not paint pixel 40,10
>
>  gcvalues.line_style = LineOnOffDash;
>  gcvalues.dashes = 2;
>  XChangeGC(disp,gc,GCLineStyle | GCDashList,&gcvalues);
>  XDrawLine(disp,win,gc,10,25,40,25); //3-1 dashes instead of 2-2
>
>  XSync(disp,1);
>  XFreeGC(disp,gc);
>  sleep(1);
> }
> return 0;
>}

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