Kontron KTAM3874-pITX - Manual (Page 158)

KTD-S0057-I Page 154 Linux® Programming Examples (DebianTM)
KTAM3874/pITX Software Guide
static void draw_cairo_object2 (XSystem sys, cairo_t *cr)
{
XColor
col;
cairo_save (cr);
cairo_translate (cr, 0.0, -25.0);
cairo_move_to (cr, 50.0, 200.0);
cairo_curve_to (cr, 50.0, 150.0, 100.0, 50.0, 150.0, 50.0);
cairo_curve_to (cr, 200.0, 50.0, 250.0, 250.0, 200.0, 250.0);
cairo_curve_to (cr, 150.0, 250.0, 200.0, 50.0, 50.0, 100.0);
cairo_curve_to (cr, -100.0, 150.0, 200.0, 150.0, 200.0, 200.0);
cairo_curve_to (cr, 200.0, 250.0, 50.0, 250.0, 50.0, 200.0);
XAllocNamedColor (sys.disp, sys.cmap, OBJ1_COL1, &col, &col);
cairo_set_source_rgb (cr, RGB_R (C(col)), RGB_G (C(col)), RGB_B (C(col)));
cairo_fill_preserve (cr);
XAllocNamedColor (sys.disp, sys.cmap, OBJ1_COL2, &col, &col);
cairo_set_source_rgb (cr, RGB_R (C(col)), RGB_G (C(col)), RGB_B (C(col)));
cairo_stroke (cr);
cairo_restore (cr);
}
static int create_X11_window (XSystem *sys)
{
Display
*disp;
XVisualInfo vinfo;
Visual *visual;
int screen;
Colormap cmap;
disp = XOpenDisplay (NULL);
if (disp == (Display *) NULL)
{
fprintf (stderr, "Cannot connect the X server\n");
return EXIT_FAILURE;
}
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");
XCloseDisplay (disp);
return EXIT_FAILURE;
}
visual = vinfo.visual;
screen = vinfo.screen;
cmap = XCreateColormap (disp, RootWindow (disp, screen), visual, AllocNone);
sys->disp = disp;
sys->cmap = cmap;
return EXIT_SUCCESS;
}