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	dwm-alpha-20201019-61bb8b2.diff (9738B)
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	1 From 51f9c34480b984e261a738e5295f518b42c2f29c Mon Sep 17 00:00:00 2001
	2 From: Petrus Karell <[email protected]>
	3 Date: Mon, 19 Oct 2020 19:15:24 +0300
	4 Subject: [PATCH] Allow dwm to have translucent bars, while keeping all
	5 the text on it opaque, just like the alpha-patch for st. Updated for 6…
	6
	7 ---
	8 config.def.h \| 7 ++++++
	9 config.mk \| 2 +-
	10 drw.c \| 26 ++++++++++++-----------
	11 drw.h \| 9 +++++---
	12 dwm.c \| 60 ++++++++++++++++++++++++++++++++++++++++++++++------
	13 5 files changed, 82 insertions(+), 22 deletions(-)
	14
	15 diff --git a/config.def.h b/config.def.h
	16 index 1c0b587..4f68fe8 100644
	17 --- a/config.def.h
	18 +++ b/config.def.h
	19 @@ -12,11 +12,18 @@ static const char col_gray2[] = "#444444";
	20 static const char col_gray3[] = "#bbbbbb";
	21 static const char col_gray4[] = "#eeeeee";
	22 static const char col_cyan[] = "#005577";
	23 +static const unsigned int baralpha = 0xd0;
	24 +static const unsigned int borderalpha = OPAQUE;
	25 static const char *colors[][3] = {
	26 /* fg bg border */
	27 [SchemeNorm] = { col_gray3, col_gray1, col_gray2 },
	28 [SchemeSel] = { col_gray4, col_cyan, col_cyan },
	29 };
	30 +static const unsigned int alphas[][3] = {
	31 + /* fg bg border */
	32 + [SchemeNorm] = { OPAQUE, baralpha, borderalpha },
	33 + [SchemeSel] = { OPAQUE, baralpha, borderalpha },
	34 +};
	35
	36 /* tagging */
	37 static const char *tags[] = { "1", "2", "3", "4", "5", "6", "7", "8", "…
	38 diff --git a/config.mk b/config.mk
	39 index 7084c33..21b5404 100644
	40 --- a/config.mk
	41 +++ b/config.mk
	42 @@ -22,7 +22,7 @@ FREETYPEINC = /usr/include/freetype2
	43
	44 # includes and libs
	45 INCS = -I${X11INC} -I${FREETYPEINC}
	46 -LIBS = -L${X11LIB} -lX11 ${XINERAMALIBS} ${FREETYPELIBS}
	47 +LIBS = -L${X11LIB} -lX11 ${XINERAMALIBS} ${FREETYPELIBS} -lXrender
	48
	49 # flags
	50 CPPFLAGS = -D_DEFAULT_SOURCE -D_BSD_SOURCE -D_POSIX_C_SOURCE=200809L -D…
	51 diff --git a/drw.c b/drw.c
	52 index 4cdbcbe..fe3aadd 100644
	53 --- a/drw.c
	54 +++ b/drw.c
	55 @@ -61,7 +61,7 @@ utf8decode(const char c, long u, size_t clen)
	56 }
	57
	58 Drw *
	59 -drw_create(Display *dpy, int screen, Window root, unsigned int w, unsig…
	60 +drw_create(Display *dpy, int screen, Window root, unsigned int w, unsig…
	61 {
	62 Drw *drw = ecalloc(1, sizeof(Drw));
	63
	64 @@ -70,8 +70,11 @@ drw_create(Display *dpy, int screen, Window root, uns…
	65 drw->root = root;
	66 drw->w = w;
	67 drw->h = h;
	68 - drw->drawable = XCreatePixmap(dpy, root, w, h, DefaultDepth(dpy…
	69 - drw->gc = XCreateGC(dpy, root, 0, NULL);
	70 + drw->visual = visual;
	71 + drw->depth = depth;
	72 + drw->cmap = cmap;
	73 + drw->drawable = XCreatePixmap(dpy, root, w, h, depth);
	74 + drw->gc = XCreateGC(dpy, drw->drawable, 0, NULL);
	75 XSetLineAttributes(dpy, drw->gc, 1, LineSolid, CapButt, JoinMit…
	76
	77 return drw;
	78 @@ -87,7 +90,7 @@ drw_resize(Drw *drw, unsigned int w, unsigned int h)
	79 drw->h = h;
	80 if (drw->drawable)
	81 XFreePixmap(drw->dpy, drw->drawable);
	82 - drw->drawable = XCreatePixmap(drw->dpy, drw->root, w, h, Defaul…
	83 + drw->drawable = XCreatePixmap(drw->dpy, drw->root, w, h, drw->d…
	84 }
	85
	86 void
	87 @@ -194,21 +197,22 @@ drw_fontset_free(Fnt *font)
	88 }
	89
	90 void
	91 -drw_clr_create(Drw drw, Clr dest, const char *clrname)
	92 +drw_clr_create(Drw drw, Clr dest, const char *clrname, unsigned int a…
	93 {
	94 if (!drw \|\| !dest \|\| !clrname)
	95 return;
	96
	97 - if (!XftColorAllocName(drw->dpy, DefaultVisual(drw->dpy, drw->s…
	98 - DefaultColormap(drw->dpy, drw->screen),
	99 + if (!XftColorAllocName(drw->dpy, drw->visual, drw->cmap,
	100 clrname, dest))
	101 die("error, cannot allocate color '%s'", clrname);
	102 +
	103 + dest->pixel = (dest->pixel & 0x00ffffffU) \| (alpha << 24);
	104 }
	105
	106 /* Wrapper to create color schemes. The caller has to call free(3) on t…
	107 * returned color scheme when done using it. */
	108 Clr *
	109 -drw_scm_create(Drw drw, const char clrnames[], size_t clrcount)
	110 +drw_scm_create(Drw drw, const char clrnames[], const unsigned int alp…
	111 {
	112 size_t i;
	113 Clr *ret;
	114 @@ -218,7 +222,7 @@ drw_scm_create(Drw drw, const char clrnames[], siz…
	115 return NULL;
	116
	117 for (i = 0; i < clrcount; i++)
	118 - drw_clr_create(drw, &ret[i], clrnames[i]);
	119 + drw_clr_create(drw, &ret[i], clrnames[i], alphas[i]);
	120 return ret;
	121 }
	122
	123 @@ -274,9 +278,7 @@ drw_text(Drw *drw, int x, int y, unsigned int w, uns…
	124 } else {
	125 XSetForeground(drw->dpy, drw->gc, drw->scheme[invert ? …
	126 XFillRectangle(drw->dpy, drw->drawable, drw->gc, x, y, …
	127 - d = XftDrawCreate(drw->dpy, drw->drawable,
	128 - DefaultVisual(drw->dpy, drw->screen),
	129 - DefaultColormap(drw->dpy, drw->screen…
	130 + d = XftDrawCreate(drw->dpy, drw->drawable, drw->visual,…
	131 x += lpad;
	132 w -= lpad;
	133 }
	134 diff --git a/drw.h b/drw.h
	135 index 4bcd5ad..a56f523 100644
	136 --- a/drw.h
	137 +++ b/drw.h
	138 @@ -20,6 +20,9 @@ typedef struct {
	139 Display *dpy;
	140 int screen;
	141 Window root;
	142 + Visual *visual;
	143 + unsigned int depth;
	144 + Colormap cmap;
	145 Drawable drawable;
	146 GC gc;
	147 Clr *scheme;
	148 @@ -27,7 +30,7 @@ typedef struct {
	149 } Drw;
	150
	151 /* Drawable abstraction */
	152 -Drw drw_create(Display dpy, int screen, Window win, unsigned int w, u…
	153 +Drw drw_create(Display dpy, int screen, Window win, unsigned int w, u…
	154 void drw_resize(Drw *drw, unsigned int w, unsigned int h);
	155 void drw_free(Drw *drw);
	156
	157 @@ -38,8 +41,8 @@ unsigned int drw_fontset_getwidth(Drw *drw, const char…
	158 void drw_font_getexts(Fnt font, const char text, unsigned int len, un…
	159
	160 /* Colorscheme abstraction */
	161 -void drw_clr_create(Drw drw, Clr dest, const char *clrname);
	162 -Clr drw_scm_create(Drw drw, const char *clrnames[], size_t clrcount);
	163 +void drw_clr_create(Drw drw, Clr dest, const char *clrname, unsigned …
	164 +Clr drw_scm_create(Drw drw, const char *clrnames[], const unsigned in…
	165
	166 /* Cursor abstraction */
	167 Cur drw_cur_create(Drw drw, int shape);
	168 diff --git a/dwm.c b/dwm.c
	169 index 664c527..d8005c7 100644
	170 --- a/dwm.c
	171 +++ b/dwm.c
	172 @@ -57,6 +57,8 @@
	173 #define TAGMASK ((1 << LENGTH(tags)) - 1)
	174 #define TEXTW(X) (drw_fontset_getwidth(drw, (X)) + lrpad)
	175
	176 +#define OPAQUE 0xffU
	177 +
	178 /* enums */
	179 enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
	180 enum { SchemeNorm, SchemeSel }; /* color schemes */
	181 @@ -233,6 +235,7 @@ static Monitor *wintomon(Window w);
	182 static int xerror(Display dpy, XErrorEvent ee);
	183 static int xerrordummy(Display dpy, XErrorEvent ee);
	184 static int xerrorstart(Display dpy, XErrorEvent ee);
	185 +static void xinitvisual();
	186 static void zoom(const Arg *arg);
	187
	188 /* variables */
	189 @@ -269,6 +272,11 @@ static Drw *drw;
	190 static Monitor mons, selmon;
	191 static Window root, wmcheckwin;
	192
	193 +static int useargb = 0;
	194 +static Visual *visual;
	195 +static int depth;
	196 +static Colormap cmap;
	197 +
	198 /* configuration, allows nested code to access above variables */
	199 #include "config.h"
	200
	201 @@ -1542,7 +1550,8 @@ setup(void)
	202 sw = DisplayWidth(dpy, screen);
	203 sh = DisplayHeight(dpy, screen);
	204 root = RootWindow(dpy, screen);
	205 - drw = drw_create(dpy, screen, root, sw, sh);
	206 + xinitvisual();
	207 + drw = drw_create(dpy, screen, root, sw, sh, visual, depth, cmap…
	208 if (!drw_fontset_create(drw, fonts, LENGTH(fonts)))
	209 die("no fonts could be loaded.");
	210 lrpad = drw->fonts->h;
	211 @@ -1570,7 +1579,7 @@ setup(void)
	212 /* init appearance */
	213 scheme = ecalloc(LENGTH(colors), sizeof(Clr *));
	214 for (i = 0; i < LENGTH(colors); i++)
	215 - scheme[i] = drw_scm_create(drw, colors[i], 3);
	216 + scheme[i] = drw_scm_create(drw, colors[i], alphas[i], 3…
	217 /* init bars */
	218 updatebars();
	219 updatestatus();
	220 @@ -1807,16 +1816,18 @@ updatebars(void)
	221 Monitor *m;
	222 XSetWindowAttributes wa = {
	223 .override_redirect = True,
	224 - .background_pixmap = ParentRelative,
	225 + .background_pixel = 0,
	226 + .border_pixel = 0,
	227 + .colormap = cmap,
	228 .event_mask = ButtonPressMask\|ExposureMask
	229 };
	230 XClassHint ch = {"dwm", "dwm"};
	231 for (m = mons; m; m = m->next) {
	232 if (m->barwin)
	233 continue;
	234 - m->barwin = XCreateWindow(dpy, root, m->wx, m->by, m->w…
	235 - CopyFromParent, DefaultVisual(dpy, scre…
	236 - CWOverrideRedirect\|CWBackPixmap\|CWEvent…
	237 + m->barwin = XCreateWindow(dpy, root, m->wx, m->by, m->w…
	238 + InputOutput, visual,
	239 + CWOverrideRedirect\|CWBackPixe…
	240 XDefineCursor(dpy, m->barwin, cursor[CurNormal]->cursor…
	241 XMapRaised(dpy, m->barwin);
	242 XSetClassHint(dpy, m->barwin, &ch);
	243 @@ -2113,6 +2124,43 @@ xerrorstart(Display dpy, XErrorEvent ee)
	244 return -1;
	245 }
	246
	247 +void
	248 +xinitvisual()
	249 +{
	250 + XVisualInfo *infos;
	251 + XRenderPictFormat *fmt;
	252 + int nitems;
	253 + int i;
	254 +
	255 + XVisualInfo tpl = {
	256 + .screen = screen,
	257 + .depth = 32,
	258 + .class = TrueColor
	259 + };
	260 + long masks = VisualScreenMask \| VisualDepthMask \| VisualClassMa…
	261 +
	262 + infos = XGetVisualInfo(dpy, masks, &tpl, &nitems);
	263 + visual = NULL;
	264 + for(i = 0; i < nitems; i ++) {
	265 + fmt = XRenderFindVisualFormat(dpy, infos[i].visual);
	266 + if (fmt->type == PictTypeDirect && fmt->direct.alphaMas…
	267 + visual = infos[i].visual;
	268 + depth = infos[i].depth;
	269 + cmap = XCreateColormap(dpy, root, visual, Alloc…
	270 + useargb = 1;
	271 + break;
	272 + }
	273 + }
	274 +
	275 + XFree(infos);
	276 +
	277 + if (! visual) {
	278 + visual = DefaultVisual(dpy, screen);
	279 + depth = DefaultDepth(dpy, screen);
	280 + cmap = DefaultColormap(dpy, screen);
	281 + }
	282 +}
	283 +
	284 void
	285 zoom(const Arg *arg)
	286 {
	287 --
	288 2.28.0
	289