Kontron KTAM3874-pITX Manual de usuario descargar pdf (Pagina 124)

KTD-S0057-I Page 120 Linux® Programming Examples (DebianTM)

KTAM3874/pITX Software Guide

XEvent e;

Pixmap pict;

XSystem xsys;

XButton xbtn;

char *txt = HEADER;

disp = XOpenDisplay (NULL);

if (disp == (Display *) NULL)

{

fprintf (stderr, "Cannot connect the X server\n");

return EXIT_FAILURE;

}

memset ((void *) &xsys, 0, sizeof (xsys));

memset ((void *) &xbtn, 0, sizeof (xbtn));

xsys.disp = disp;

if (!XMatchVisualInfo (disp, 0, 32, TrueColor, &vinfo))

if (!XMatchVisualInfo (disp, 0, 24, TrueColor, &vinfo))

if (!XMatchVisualInfo (disp, 0, 16, TrueColor, &vinfo))

{

fprintf (stderr, "Cannot get TrueColor Visual\n");

free_resources (xsys);

return EXIT_FAILURE;

}

visual = vinfo.visual;

depth = vinfo.depth;

screen = vinfo.screen;

cmap = XCreateColormap (disp, RootWindow (disp, screen), visual, AllocNone);

wa.background_pixel = WhitePixel (disp, screen);

wa.border_pixel = BlackPixel (disp, screen);

wa.colormap = cmap;

win = XCreateWindow (disp, RootWindow (disp, screen), LEFT, TOP, WIDTH, HEIGHT, BORDER, depth,

InputOutput, visual, CWBorderPixel | CWBackPixel | CWColormap, &wa);

sh.min_width = WIDTH;

sh.min_height = HEIGHT;

sh.flags = PMinSize;

XSetWMNormalHints (disp, win, &sh);

XStringListToTextProperty (&txt, 1, &name);

XSetWMName (disp, win, &name);

xsys.win = win;

xsys.screen = screen;

xsys.cmap = cmap;

gc = XCreateGC (disp, win, 0, NULL);

if (! gc)

{

fprintf (stderr, "Cannot create graphics context\n");

free_resources (xsys);

return EXIT_FAILURE;

}

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