From 4da63c93feab351ecc33d47a86c4ad06680d1ee3 Mon Sep 17 00:00:00 2001 From: Matt Hunter Date: Sat, 17 Jan 2026 23:02:28 -0500 Subject: patch: alpha Allow dwm to have translucent bars, while keeping all the text on it opaque, just like the alpha patch for st. By default dwm might make windows' borders transparent when using composit window manager (e.g. xcompmgr, picom). Alpha patch allows to make borders opaque. If all you want is to make borders opaque, you don't care about statusbar opacity and/or have problems applying alpha patch, then you might use fixborders patch instead. --- config.def.h | 2 ++ config.mk | 2 +- drw.c | 25 +++++++++++++------------ drw.h | 9 ++++++--- dwm.c | 60 ++++++++++++++++++++++++++++++++++++++++++++++++++++++------ 5 files changed, 76 insertions(+), 22 deletions(-) diff --git a/config.def.h b/config.def.h index 355ea67..3a88b1c 100644 --- a/config.def.h +++ b/config.def.h @@ -7,6 +7,8 @@ static const int showbar = 1; /* 0 means no bar */ static const int topbar = 1; /* 0 means bottom bar */ static const char *fonts[] = { "monospace:size=10" }; static const char dmenufont[] = "monospace:size=10"; +static unsigned int baralpha = 0xd0; +static unsigned int borderalpha = OPAQUE; static const char col_gray1[] = "#080808"; static const char col_gray2[] = "#222222"; static const char col_gray3[] = "#bbbbbb"; diff --git a/config.mk b/config.mk index 6e875f1..7a52638 100644 --- a/config.mk +++ b/config.mk @@ -23,7 +23,7 @@ FREETYPEINC = /usr/include/freetype2 # includes and libs INCS = -I${X11INC} -I${FREETYPEINC} -LIBS = -L${X11LIB} -lX11 ${XINERAMALIBS} ${FREETYPELIBS} +LIBS = -L${X11LIB} -lX11 ${XINERAMALIBS} ${FREETYPELIBS} -lXrender # flags CPPFLAGS = -D_DEFAULT_SOURCE -D_BSD_SOURCE -D_XOPEN_SOURCE=700L -DVERSION=\"${VERSION}\" ${XINERAMAFLAGS} diff --git a/drw.c b/drw.c index 9fdd1a4..ef07c84 100644 --- a/drw.c +++ b/drw.c @@ -47,7 +47,7 @@ utf8decode(const char *s_in, long *u, int *err) } Drw * -drw_create(Display *dpy, int screen, Window root, unsigned int w, unsigned int h) +drw_create(Display *dpy, int screen, Window root, unsigned int w, unsigned int h, Visual *visual, unsigned int depth, Colormap cmap) { Drw *drw = ecalloc(1, sizeof(Drw)); @@ -56,8 +56,11 @@ drw_create(Display *dpy, int screen, Window root, unsigned int w, unsigned int h drw->root = root; drw->w = w; drw->h = h; - drw->drawable = XCreatePixmap(dpy, root, w, h, DefaultDepth(dpy, screen)); - drw->gc = XCreateGC(dpy, root, 0, NULL); + drw->visual = visual; + drw->depth = depth; + drw->cmap = cmap; + drw->drawable = XCreatePixmap(dpy, root, w, h, depth); + drw->gc = XCreateGC(dpy, drw->drawable, 0, NULL); XSetLineAttributes(dpy, drw->gc, 1, LineSolid, CapButt, JoinMiter); return drw; @@ -73,7 +76,7 @@ drw_resize(Drw *drw, unsigned int w, unsigned int h) drw->h = h; if (drw->drawable) XFreePixmap(drw->dpy, drw->drawable); - drw->drawable = XCreatePixmap(drw->dpy, drw->root, w, h, DefaultDepth(drw->dpy, drw->screen)); + drw->drawable = XCreatePixmap(drw->dpy, drw->root, w, h, drw->depth); } void @@ -167,20 +170,20 @@ drw_fontset_free(Fnt *font) } void -drw_clr_create(Drw *drw, Clr *dest, const char *clrname) +drw_clr_create(Drw *drw, Clr *dest, const char *clrname, unsigned int alpha) { if (!drw || !dest || !clrname) return; - if (!XftColorAllocName(drw->dpy, DefaultVisual(drw->dpy, drw->screen), - DefaultColormap(drw->dpy, drw->screen), + if (!XftColorAllocName(drw->dpy, drw->visual, drw->cmap, clrname, dest)) die("error, cannot allocate color '%s'", clrname); + dest->pixel = (dest->pixel & 0x00ffffffU) | (alpha << 24); } /* Create color schemes. */ Clr * -drw_scm_create(Drw *drw, const char *clrnames[], size_t clrcount) +drw_scm_create(Drw *drw, const char *clrnames[], const unsigned int clralphas[], size_t clrcount) { size_t i; Clr *ret; @@ -190,7 +193,7 @@ drw_scm_create(Drw *drw, const char *clrnames[], size_t clrcount) return NULL; for (i = 0; i < clrcount; i++) - drw_clr_create(drw, &ret[i], clrnames[i]); + drw_clr_create(drw, &ret[i], clrnames[i], clralphas[i]); return ret; } @@ -273,9 +276,7 @@ drw_text(Drw *drw, int x, int y, unsigned int w, unsigned int h, unsigned int lp XFillRectangle(drw->dpy, drw->drawable, drw->gc, x, y, w, h); if (w < lpad) return x + w; - d = XftDrawCreate(drw->dpy, drw->drawable, - DefaultVisual(drw->dpy, drw->screen), - DefaultColormap(drw->dpy, drw->screen)); + d = XftDrawCreate(drw->dpy, drw->drawable, drw->visual, drw->cmap); x += lpad; w -= lpad; } diff --git a/drw.h b/drw.h index bda06f9..8471065 100644 --- a/drw.h +++ b/drw.h @@ -20,6 +20,9 @@ typedef struct { Display *dpy; int screen; Window root; + Visual *visual; + unsigned int depth; + Colormap cmap; Drawable drawable; GC gc; Clr *scheme; @@ -27,7 +30,7 @@ typedef struct { } Drw; /* Drawable abstraction */ -Drw *drw_create(Display *dpy, int screen, Window win, unsigned int w, unsigned int h); +Drw *drw_create(Display *dpy, int screen, Window win, unsigned int w, unsigned int h, Visual *visual, unsigned int depth, Colormap cmap); void drw_resize(Drw *drw, unsigned int w, unsigned int h); void drw_free(Drw *drw); @@ -39,9 +42,9 @@ unsigned int drw_fontset_getwidth_clamp(Drw *drw, const char *text, unsigned int void drw_font_getexts(Fnt *font, const char *text, unsigned int len, unsigned int *w, unsigned int *h); /* Colorscheme abstraction */ -void drw_clr_create(Drw *drw, Clr *dest, const char *clrname); +void drw_clr_create(Drw *drw, Clr *dest, const char *clrname, unsigned int alpha); void drw_clr_free(Drw *drw, Clr *c); -Clr *drw_scm_create(Drw *drw, const char *clrnames[], size_t clrcount); +Clr *drw_scm_create(Drw *drw, const char *clrnames[], const unsigned int clralphas[], size_t clrcount); void drw_scm_free(Drw *drw, Clr *scm, size_t clrcount); /* Cursor abstraction */ diff --git a/dwm.c b/dwm.c index 53b393e..fb6153c 100644 --- a/dwm.c +++ b/dwm.c @@ -56,6 +56,8 @@ #define TAGMASK ((1 << LENGTH(tags)) - 1) #define TEXTW(X) (drw_fontset_getwidth(drw, (X)) + lrpad) +#define OPAQUE 0xffU + /* enums */ enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */ enum { SchemeNorm, SchemeSel }; /* color schemes */ @@ -231,6 +233,7 @@ static Monitor *wintomon(Window w); static int xerror(Display *dpy, XErrorEvent *ee); static int xerrordummy(Display *dpy, XErrorEvent *ee); static int xerrorstart(Display *dpy, XErrorEvent *ee); +static void xinitvisual(void); static void zoom(const Arg *arg); /* variables */ @@ -266,6 +269,10 @@ static Display *dpy; static Drw *drw; static Monitor *mons, *selmon; static Window root, wmcheckwin; +static int useargb = 0; +static Visual *visual; +static int depth; +static Colormap cmap; /* configuration, allows nested code to access above variables */ #include "config.h" @@ -1558,7 +1565,8 @@ setup(void) sw = DisplayWidth(dpy, screen); sh = DisplayHeight(dpy, screen); root = RootWindow(dpy, screen); - drw = drw_create(dpy, screen, root, sw, sh); + xinitvisual(); + drw = drw_create(dpy, screen, root, sw, sh, visual, depth, cmap); if (!drw_fontset_create(drw, fonts, LENGTH(fonts))) die("no fonts could be loaded."); lrpad = drw->fonts->h; @@ -1585,8 +1593,9 @@ setup(void) cursor[CurMove] = drw_cur_create(drw, XC_fleur); /* init appearance */ scheme = ecalloc(LENGTH(colors), sizeof(Clr *)); + unsigned int alphas[] = {borderalpha, baralpha, OPAQUE}; for (i = 0; i < LENGTH(colors); i++) - scheme[i] = drw_scm_create(drw, colors[i], 3); + scheme[i] = drw_scm_create(drw, colors[i], alphas, 3); /* init bars */ updatebars(); updatestatus(); @@ -1821,16 +1830,18 @@ updatebars(void) Monitor *m; XSetWindowAttributes wa = { .override_redirect = True, - .background_pixmap = ParentRelative, + .background_pixel = 0, + .border_pixel = 0, + .colormap = cmap, .event_mask = ButtonPressMask|ExposureMask }; XClassHint ch = {"dwm", "dwm"}; for (m = mons; m; m = m->next) { if (m->barwin) continue; - m->barwin = XCreateWindow(dpy, root, m->wx, m->by, m->ww, bh, 0, DefaultDepth(dpy, screen), - CopyFromParent, DefaultVisual(dpy, screen), - CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa); + m->barwin = XCreateWindow(dpy, root, m->wx, m->by, m->ww, bh, 0, depth, + InputOutput, visual, + CWOverrideRedirect|CWBackPixel|CWBorderPixel|CWColormap|CWEventMask, &wa); XDefineCursor(dpy, m->barwin, cursor[CurNormal]->cursor); XMapRaised(dpy, m->barwin); XSetClassHint(dpy, m->barwin, &ch); @@ -2128,6 +2139,43 @@ xerrorstart(Display *dpy, XErrorEvent *ee) return -1; } +void +xinitvisual(void) +{ + 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); + } +} + void zoom(const Arg *arg) { -- cgit v1.2.3