--- x.c.orig	Fri Mar 13 08:07:14 2026
+++ x.c	Fri Mar 13 08:10:58 2026
@@ -251,6 +251,7 @@
 static char *opt_line  = NULL;
 static char *opt_name  = NULL;
 static char *opt_title = NULL;
+static int opt_pixelgeom = 0;
 
 static uint buttons; /* bit field of pressed buttons */
 
@@ -1147,6 +1148,15 @@
 	usedfont = (opt_font == NULL)? font : opt_font;
 	xloadfonts(usedfont, 0);
 
+	/* -p: convert stashed pixel dimensions to cols/rows */
+	if (opt_pixelgeom && win.w > 0 && win.h > 0) {
+		cols = MAX(1, (win.w - 2 * borderpx) / win.cw);
+		rows = MAX(1, (win.h - 2 * borderpx) / win.ch);
+		tresize(cols, rows);
+		win.w = 2 * borderpx + cols * win.cw;
+		win.h = 2 * borderpx + rows * win.ch;
+	}
+
 	/* colors */
 	xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
 	xloadcols();
@@ -2026,11 +2036,11 @@
 void
 usage(void)
 {
-	die("usage: %s [-aiv] [-c class] [-f font] [-g geometry]"
+	die("usage: %s [-aipv] [-c class] [-f font] [-g geometry]"
 	    " [-n name] [-o file]\n"
 	    "          [-T title] [-t title] [-w windowid]"
 	    " [[-e] command [args ...]]\n"
-	    "       %s [-aiv] [-c class] [-f font] [-g geometry]"
+	    "       %s [-aipv] [-c class] [-f font] [-g geometry]"
 	    " [-n name] [-o file]\n"
 	    "          [-T title] [-t title] [-w windowid] -l line"
 	    " [stty_args ...]\n", argv0, argv0);
@@ -2061,6 +2071,9 @@
 		xw.gm = XParseGeometry(EARGF(usage()),
 				&xw.l, &xw.t, &cols, &rows);
 		break;
+	case 'p':
+		opt_pixelgeom = 1;
+		break;
 	case 'i':
 		xw.isfixed = 1;
 		break;
@@ -2096,6 +2109,18 @@
 
 	setlocale(LC_CTYPE, "");
 	XSetLocaleModifiers("");
+	if (opt_pixelgeom && cols > 0 && rows > 0) {
+		/*
+		 * -p: cols/rows from -g are pixel dimensions.
+		 * Stash them in win.w/win.h; use default 80x24
+		 * for the initial tnew() allocation. xinit() will
+		 * compute the real cols/rows after font loading.
+		 */
+		win.w = cols;
+		win.h = rows;
+		cols = 80;
+		rows = 24;
+	}
 	cols = MAX(cols, 1);
 	rows = MAX(rows, 1);
 	tnew(cols, rows);