From: Viliam Kováč <viliamkovac1223@gmail.com>
Date: Fri, 10 Dec 2021 17:22:00
Subject: [PATCH] Add a image foreground
diff --git a/config.def.h b/config.def.h
index 9855e21..dfa61d6 100644
--- a/config.def.h
+++ b/config.def.h
@@ -10,3 +10,10 @@ static const char *colorname[NUMCOLS] = {
 
 /* treat a cleared input like a wrong password (color) */
 static const int failonclear = 1;
+
+static const char *imgpath          = "img.xpm";
+static const int imgwidth           = 1920;
+static const int imgheight          = 1080;
+static const int imgoffsetx         = 0;
+static const int imgoffsety         = 0;
+static const int showimgonlyatstart = 1;
diff --git a/config.mk b/config.mk
index 74429ae..6145285 100644
--- a/config.mk
+++ b/config.mk
@@ -12,7 +12,7 @@ X11LIB = /usr/X11R6/lib
 
 # includes and libs
 INCS = -I. -I/usr/include -I${X11INC}
-LIBS = -L/usr/lib -lc -lcrypt -L${X11LIB} -lX11 -lXext -lXrandr
+LIBS = -L/usr/lib -lc -lcrypt -L${X11LIB} -lX11 -lXext -lXrandr -lXpm
 
 # flags
 CPPFLAGS = -DVERSION=\"${VERSION}\" -D_DEFAULT_SOURCE -DHAVE_SHADOW_H
diff --git a/slock.c b/slock.c
index 5ae738c..b36c347 100644
--- a/slock.c
+++ b/slock.c
@@ -18,6 +18,7 @@
 #include <X11/keysym.h>
 #include <X11/Xlib.h>
 #include <X11/Xutil.h>
+#include <X11/xpm.h>
 
 #include "arg.h"
 #include "util.h"
@@ -124,6 +125,19 @@ gethash(void)
 	return hash;
 }
 
+static void
+showimage(Display *dpy, Window win)
+{
+  XImage *ximage;
+
+  if (!XpmReadFileToImage (dpy, imgpath, &ximage, NULL, NULL)) {
+    XSelectInput(dpy, win, ButtonPressMask|ExposureMask);
+    XMapWindow(dpy, win);
+
+    XPutImage(dpy, win, DefaultGC(dpy, 0), ximage, 0, 0, imgoffsetx, imgoffsety, imgwidth, imgheight);
+  }
+}
+
 static void
 readpw(Display *dpy, struct xrandr *rr, struct lock **locks, int nscreens,
        const char *hash)
@@ -194,6 +208,8 @@ readpw(Display *dpy, struct xrandr *rr, struct lock **locks, int nscreens,
 					                     locks[screen]->win,
 					                     locks[screen]->colors[color]);
 					XClearWindow(dpy, locks[screen]->win);
+          if (showimgonlyatstart != 1)
+            showimage(dpy, locks[screen]->win);
 				}
 				oldc = color;
 			}
@@ -256,6 +272,8 @@ lockscreen(Display *dpy, struct xrandr *rr, int screen)
 	                                &color, &color, 0, 0);
 	XDefineCursor(dpy, lock->win, invisible);
 
+  showimage(dpy, lock->win);
+
 	/* Try to grab mouse pointer *and* keyboard for 600ms, else fail the lock */
 	for (i = 0, ptgrab = kbgrab = -1; i < 6; i++) {
 		if (ptgrab != GrabSuccess) {