From 7d3bbd5e04685934acef976f1b4258e86a394fa5 Mon Sep 17 00:00:00 2001
From: Douglas Rumbaugh <doug@douglasrumbaugh.com>
Date: Sun, 19 Dec 2021 19:56:13 -0500
Subject: Applied alpha patch

https://tools.suckless.org/dmenu/patches/alpha/
---
 dmenu.c | 64 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++------
 1 file changed, 58 insertions(+), 6 deletions(-)

(limited to 'dmenu.c')

diff --git a/dmenu.c b/dmenu.c
index 9d57c21..0d05965 100644
--- a/dmenu.c
+++ b/dmenu.c
@@ -10,6 +10,7 @@
 
 #include <X11/Xlib.h>
 #include <X11/Xatom.h>
+#include <X11/Xproto.h>
 #include <X11/Xutil.h>
 #ifdef XINERAMA
 #include <X11/extensions/Xinerama.h>
@@ -26,6 +27,8 @@
 #define LENGTH(X)             (sizeof X / sizeof X[0])
 #define TEXTW(X)              (drw_fontset_getwidth(drw, (X)) + lrpad)
 
+#define OPAQUE                0xffU
+
 /* enums */
 enum { SchemeNorm, SchemeSel, SchemeOut, SchemeLast }; /* color schemes */
 
@@ -58,10 +61,16 @@ static Clr *scheme[SchemeLast];
 static char *colortemp[4];
 static char *tempfonts;
 
+static int useargb = 0;
+static Visual *visual;
+static int depth;
+static Colormap cmap;
+
 #include "config.h"
 
 static int (*fstrncmp)(const char *, const char *, size_t) = strncmp;
 static char *(*fstrstr)(const char *, const char *) = strstr;
+static void xinitvisual();
 
 static void
 appenditem(struct item *item, struct item **list, struct item **last)
@@ -638,7 +647,7 @@ setup(void)
 #endif
 	/* init appearance */
 	for (j = 0; j < SchemeLast; j++) {
-		scheme[j] = drw_scm_create(drw, (const char**)colors[j], 2);
+		scheme[j] = drw_scm_create(drw, (const char**)colors[j], alphas[i], 2);
 	}
 	for (j = 0; j < SchemeOut; ++j) {
 		for (i = 0; i < 2; ++i)
@@ -712,11 +721,14 @@ setup(void)
 
 	/* create menu window */
 	swa.override_redirect = True;
-	swa.background_pixel = scheme[SchemeNorm][ColBg].pixel;
+	swa.background_pixel = 0;
+	swa.border_pixel = 0;
+	swa.colormap = cmap;
+
 	swa.event_mask = ExposureMask | KeyPressMask | VisibilityChangeMask;
-	win = XCreateWindow(dpy, parentwin, x, y - (topbar ? 0 : border_width * 2), mw - border_width * 2, mh, border_width,
-	                    CopyFromParent, CopyFromParent, CopyFromParent,
-	                    CWOverrideRedirect | CWBackPixel | CWEventMask, &swa);
+	win = XCreateWindow(dpy, parentwin, x, y, mw, mh, border_width,
+	                    depth, CopyFromParent, visual,
+	                    CWOverrideRedirect | CWBackPixel | CWBorderPixel | CWColormap | CWEventMask, &swa);
 	if (border_width)
 		XSetWindowBorder(dpy, win, scheme[SchemeSel][ColBg].pixel);
 	XSetClassHint(dpy, win, &ch);
@@ -845,7 +857,10 @@ main(int argc, char *argv[])
 	if (!XGetWindowAttributes(dpy, parentwin, &wa))
 		die("could not get embedding window attributes: 0x%lx",
 		    parentwin);
-	drw = drw_create(dpy, screen, root, wa.width, wa.height);
+
+	xinitvisual();
+	drw = drw_create(dpy, screen, root, wa.width, wa.height, visual, depth, cmap);
+
 	readxresources();
 	/* Now we check whether to override xresources with commandline parameters */
 	if ( tempfonts )
@@ -882,3 +897,40 @@ main(int argc, char *argv[])
 
 	return 1; /* unreachable */
 }
+
+ void
+xinitvisual()
+{
+	XVisualInfo *infos;
+	XRenderPictFormat *fmt;
+	int nitems;
+	int i;
+
+	XVisualInfo tpl = {
+		.screen = screen,
+		.depth = 32,
+		.class = TrueColor
+	};
+	long masks = VisualScreenMask | VisualDepthMask | VisualClassMask;
+
+	infos = XGetVisualInfo(dpy, masks, &tpl, &nitems);
+	visual = NULL;
+	for(i = 0; i < nitems; i ++) {
+		fmt = XRenderFindVisualFormat(dpy, infos[i].visual);
+		if (fmt->type == PictTypeDirect && fmt->direct.alphaMask) {
+			visual = infos[i].visual;
+			depth = infos[i].depth;
+			cmap = XCreateColormap(dpy, root, visual, AllocNone);
+			useargb = 1;
+			break;
+		}
+	}
+
+	XFree(infos);
+
+	if (! visual) {
+		visual = DefaultVisual(dpy, screen);
+		depth = DefaultDepth(dpy, screen);
+		cmap = DefaultColormap(dpy, screen);
+	}
+}
-- 
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