apply blured or pixelated screenshot patch

config.def.h

@@ -9,4 +9,13 @@ static const char *colorname[NUMCOLS] = {
 };
 
 /* treat a cleared input like a wrong password (color) */
-static const int failonclear = 1;
+static const int failonclear = 0;
+
+/*Enable blur*/
+//#define BLUR
+/*Set blur radius*/
+static const int blurRadius=5;
+/*Enable Pixelation*/
+#define PIXELATION
+/*Set pixelation radius*/
+static const int pixelSize=10;

config.mk

@@ -12,11 +12,11 @@ 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 -lImlib2
 
 # flags
 CPPFLAGS = -DVERSION=\"${VERSION}\" -D_DEFAULT_SOURCE -DHAVE_SHADOW_H
-CFLAGS = -std=c99 -pedantic -Wall -Os ${INCS} ${CPPFLAGS}
+CFLAGS = -std=c99 -pedantic -Wall -Ofast ${INCS} ${CPPFLAGS}
 LDFLAGS = -s ${LIBS}
 COMPATSRC = explicit_bzero.c
 

readme

@@ -0,0 +1,12 @@
+slock
+=====
+Simple X display locker.
+
+Configuration
+-------------
+slock is configured via config.h like most other suckless.org software.
+
+Patches
+-------
+
+- blured screen: https://tools.suckless.org/slock/patches/blur-pixelated-screen/

slock.c

@@ -18,6 +18,7 @@
 #include <X11/keysym.h>
 #include <X11/Xlib.h>
 #include <X11/Xutil.h>
+#include <Imlib2.h>
 
 #include "arg.h"
 #include "util.h"
@@ -35,6 +36,7 @@ struct lock {
 	int screen;
 	Window root, win;
 	Pixmap pmap;
+	Pixmap bgmap;
 	unsigned long colors[NUMCOLS];
 };
 
@@ -46,6 +48,8 @@ struct xrandr {
 
 #include "config.h"
 
+Imlib_Image image;
+
 static void
 die(const char *errstr, ...)
 {
@@ -190,9 +194,10 @@ readpw(Display *dpy, struct xrandr *rr, struct lock **locks, int nscreens,
 			color = len ? INPUT : ((failure || failonclear) ? FAILED : INIT);
 			if (running && oldc != color) {
 				for (screen = 0; screen < nscreens; screen++) {
-					XSetWindowBackground(dpy,
+                    if(locks[screen]->bgmap)
-					                     locks[screen]->win,
+                        XSetWindowBackgroundPixmap(dpy, locks[screen]->win, locks[screen]->bgmap);
-					                     locks[screen]->colors[color]);
+                    else
+                        XSetWindowBackground(dpy, locks[screen]->win, locks[screen]->colors[0]);
 					XClearWindow(dpy, locks[screen]->win);
 				}
 				oldc = color;
@@ -227,6 +232,17 @@ lockscreen(Display *dpy, struct xrandr *rr, int screen)
 	lock->screen = screen;
 	lock->root = RootWindow(dpy, lock->screen);
 
+    if(image)
+    {
+        lock->bgmap = XCreatePixmap(dpy, lock->root, DisplayWidth(dpy, lock->screen), DisplayHeight(dpy, lock->screen), DefaultDepth(dpy, lock->screen));
+        imlib_context_set_image(image);
+        imlib_context_set_display(dpy);
+        imlib_context_set_visual(DefaultVisual(dpy, lock->screen));
+        imlib_context_set_colormap(DefaultColormap(dpy, lock->screen));
+        imlib_context_set_drawable(lock->bgmap);
+        imlib_render_image_on_drawable(0, 0);
+        imlib_free_image();
+    }
 	for (i = 0; i < NUMCOLS; i++) {
 		XAllocNamedColor(dpy, DefaultColormap(dpy, lock->screen),
 		                 colorname[i], &color, &dummy);
@@ -243,6 +259,8 @@ lockscreen(Display *dpy, struct xrandr *rr, int screen)
 	                          CopyFromParent,
 	                          DefaultVisual(dpy, lock->screen),
 	                          CWOverrideRedirect | CWBackPixel, &wa);
+    if(lock->bgmap)
+        XSetWindowBackgroundPixmap(dpy, lock->win, lock->bgmap);
 	lock->pmap = XCreateBitmapFromData(dpy, lock->win, curs, 8, 8);
 	invisible = XCreatePixmapCursor(dpy, lock->pmap, lock->pmap,
 	                                &color, &color, 0, 0);
@@ -347,6 +365,59 @@ main(int argc, char **argv) {
 	if (setuid(duid) < 0)
 		die("slock: setuid: %s\n", strerror(errno));
 
+	/*Create screenshot Image*/
+	Screen *scr = ScreenOfDisplay(dpy, DefaultScreen(dpy));
+	image = imlib_create_image(scr->width,scr->height);
+	imlib_context_set_image(image);
+	imlib_context_set_display(dpy);
+	imlib_context_set_visual(DefaultVisual(dpy,0));
+	imlib_context_set_drawable(RootWindow(dpy,XScreenNumberOfScreen(scr)));
+	imlib_copy_drawable_to_image(0,0,0,scr->width,scr->height,0,0,1);
+
+#ifdef BLUR
+
+	/*Blur function*/
+	imlib_image_blur(blurRadius);
+#endif // BLUR
+
+#ifdef PIXELATION
+	/*Pixelation*/
+	int width = scr->width;
+	int height = scr->height;
+
+	for(int y = 0; y < height; y += pixelSize)
+	{
+		for(int x = 0; x < width; x += pixelSize)
+		{
+			int red = 0;
+			int green = 0;
+			int blue = 0;
+
+			Imlib_Color pixel;
+			Imlib_Color* pp;
+			pp = &pixel;
+			for(int j = 0; j < pixelSize && j < height; j++)
+			{
+				for(int i = 0; i < pixelSize && i < width; i++)
+				{
+					imlib_image_query_pixel(x+i,y+j,pp);
+					red += pixel.red;
+					green += pixel.green;
+					blue += pixel.blue;
+				}
+			}
+			red /= (pixelSize*pixelSize);
+			green /= (pixelSize*pixelSize);
+			blue /= (pixelSize*pixelSize);
+			imlib_context_set_color(red,green,blue,pixel.alpha);
+			imlib_image_fill_rectangle(x,y,pixelSize,pixelSize);
+			red = 0;
+			green = 0;
+			blue = 0;
+		}
+	}
+
+#endif
 	/* check for Xrandr support */
 	rr.active = XRRQueryExtension(dpy, &rr.evbase, &rr.errbase);