--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/config/st/patches/st-alpha-20240814-a0274bc.diff	Mon Sep 28 13:10:19 2026 -0500
@@ -0,0 +1,129 @@
+diff --git a/config.def.h b/config.def.h
+index 2cd740a..019a4e1 100644
+--- a/config.def.h
++++ b/config.def.h
+@@ -93,6 +93,9 @@ char *termname = "st-256color";
+  */
+ unsigned int tabspaces = 8;
+ 
++/* bg opacity */
++float alpha = 0.8;
++
+ /* Terminal colors (16 first used in escape sequence) */
+ static const char *colorname[] = {
+ 	/* 8 normal colors */
+diff --git a/x.c b/x.c
+index d73152b..f32fd6c 100644
+--- a/x.c
++++ b/x.c
+@@ -105,6 +105,7 @@ typedef struct {
+ 	XSetWindowAttributes attrs;
+ 	int scr;
+ 	int isfixed; /* is fixed geometry? */
++	int depth; /* bit depth */
+ 	int l, t; /* left and top offset */
+ 	int gm; /* geometry mask */
+ } XWindow;
+@@ -752,7 +753,7 @@ xresize(int col, int row)
+ 
+ 	XFreePixmap(xw.dpy, xw.buf);
+ 	xw.buf = XCreatePixmap(xw.dpy, xw.win, win.w, win.h,
+-			DefaultDepth(xw.dpy, xw.scr));
++			xw.depth);
+ 	XftDrawChange(xw.draw, xw.buf);
+ 	xclear(0, 0, win.w, win.h);
+ 
+@@ -812,6 +813,10 @@ xloadcols(void)
+ 			else
+ 				die("could not allocate color %d\n", i);
+ 		}
++
++	dc.col[defaultbg].color.alpha = (unsigned short)(0xffff * alpha);
++	dc.col[defaultbg].pixel &= 0x00FFFFFF;
++	dc.col[defaultbg].pixel |= (unsigned char)(0xff * alpha) << 24;
+ 	loaded = 1;
+ }
+ 
+@@ -842,6 +847,12 @@ xsetcolorname(int x, const char *name)
+ 	XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
+ 	dc.col[x] = ncolor;
+ 
++	if (x == defaultbg) {
++		dc.col[defaultbg].color.alpha = (unsigned short)(0xffff * alpha);
++		dc.col[defaultbg].pixel &= 0x00FFFFFF;
++		dc.col[defaultbg].pixel |= (unsigned char)(0xff * alpha) << 24;
++	}
++
+ 	return 0;
+ }
+ 
+@@ -1134,11 +1145,25 @@ xinit(int cols, int rows)
+ 	Window parent, root;
+ 	pid_t thispid = getpid();
+ 	XColor xmousefg, xmousebg;
++	XWindowAttributes attr;
++	XVisualInfo vis;
+ 
+ 	if (!(xw.dpy = XOpenDisplay(NULL)))
+ 		die("can't open display\n");
+ 	xw.scr = XDefaultScreen(xw.dpy);
+-	xw.vis = XDefaultVisual(xw.dpy, xw.scr);
++
++	root = XRootWindow(xw.dpy, xw.scr);
++	if (!(opt_embed && (parent = strtol(opt_embed, NULL, 0))))
++		parent = root;
++
++	if (XMatchVisualInfo(xw.dpy, xw.scr, 32, TrueColor, &vis) != 0) {
++		xw.vis = vis.visual;
++		xw.depth = vis.depth;
++	} else {
++		XGetWindowAttributes(xw.dpy, parent, &attr);
++		xw.vis = attr.visual;
++		xw.depth = attr.depth;
++	}
+ 
+ 	/* font */
+ 	if (!FcInit())
+@@ -1148,7 +1173,7 @@ xinit(int cols, int rows)
+ 	xloadfonts(usedfont, 0);
+ 
+ 	/* colors */
+-	xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
++	xw.cmap = XCreateColormap(xw.dpy, parent, xw.vis, None);
+ 	xloadcols();
+ 
+ 	/* adjust fixed window geometry */
+@@ -1168,11 +1193,8 @@ xinit(int cols, int rows)
+ 		| ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
+ 	xw.attrs.colormap = xw.cmap;
+ 
+-	root = XRootWindow(xw.dpy, xw.scr);
+-	if (!(opt_embed && (parent = strtol(opt_embed, NULL, 0))))
+-		parent = root;
+-	xw.win = XCreateWindow(xw.dpy, root, xw.l, xw.t,
+-			win.w, win.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
++	xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
++			win.w, win.h, 0, xw.depth, InputOutput,
+ 			xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
+ 			| CWEventMask | CWColormap, &xw.attrs);
+ 	if (parent != root)
+@@ -1183,7 +1205,7 @@ xinit(int cols, int rows)
+ 	dc.gc = XCreateGC(xw.dpy, xw.win, GCGraphicsExposures,
+ 			&gcvalues);
+ 	xw.buf = XCreatePixmap(xw.dpy, xw.win, win.w, win.h,
+-			DefaultDepth(xw.dpy, xw.scr));
++			xw.depth);
+ 	XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
+ 	XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, win.w, win.h);
+ 
+@@ -2047,6 +2069,10 @@ main(int argc, char *argv[])
+ 	case 'a':
+ 		allowaltscreen = 0;
+ 		break;
++	case 'A':
++		alpha = strtof(EARGF(usage()), NULL);
++		LIMIT(alpha, 0.0, 1.0);
++		break;
+ 	case 'c':
+ 		opt_class = EARGF(usage());
+ 		break;