Added Xft support (in the same fashion as done in dmenu by Hiltjo Posthuma), Xinerama support, changed colors and key layout

This is version 6 of my svkbd patch, and I'm nearing completion on all
the stuff I wanted to implement. I decided to split this patch into 4
logical units, making for a nicer commit history when merged,
all four together constitute all the work I did on svkbd
and need to be applied in succession.

See the last patch in the series (4/4) for comments on what I changed since
v5.

Signed-off-by: Miles Alan <m@milesalan.com>

LICENSE

@@ -2,6 +2,7 @@ MIT/X Consortium License
 
 © 2011 Christoph Lohmann <20h@r-36.net>
 © 2008-2011 Enno Boland <g # s01 ' de>
+© 2020 Maarten van Gompel <proycon@anaproy.nl>
 
 Permission is hereby granted, free of charge, to any person obtaining a
 copy of this software and associated documentation files (the "Software"),

Makefile

@@ -3,7 +3,7 @@
 
 include config.mk
 
-SRC = svkbd.c
+SRC = drw.c svkbd.c util.c
 
 all: options svkbd-${LAYOUT}
 

config.def.h

@@ -1,9 +1,12 @@
 static const Bool wmborder = True;
-static const char font[] = "10x20";
+static int fontsize = 16;
-static const char normbgcolor[] = "#cccccc";
+static const char *fonts[] = {
-static const char normfgcolor[] = "#000000";
+	"monospace:size=16"
-static const char pressbgcolor[] = "#0000cc";
+};
-static const char pressfgcolor[] = "#ffffff";
+static const char *colors[SchemeLast][2] = {
-static const char highlightbgcolor[] = "#0000cc";
+	/*     fg         bg       */
-static const char highlightfgcolor[] = "#ffffff";
+	[SchemeNorm] = { "#58a7c6", "#14313d" },
+	[SchemePress] = { "#ffffff", "#005577" },
+	[SchemeHighlight] = { "#58a7c6", "#005577" },
+};
 

config.mk

@@ -1,7 +1,7 @@
 # svkbd version
 VERSION = 0.1
 
-LAYOUT ?= en
+LAYOUT ?= sxmo
 
 # Customize below to fit your system
 
@@ -12,13 +12,16 @@ MANPREFIX = ${PREFIX}/share/man
 X11INC = /usr/X11R6/include
 X11LIB = /usr/X11R6/lib
 
+# Xinerama, comment if you don't want it
+XINERAMALIBS = -L${X11LIB} -lXinerama
+XINERAMAFLAGS = -DXINERAMA
+
 # includes and libs
-INCS = -I. -I./layouts -I/usr/include -I${X11INC}
+INCS = -I. -I./layouts -I/usr/include -I${X11INC} -I/usr/include/freetype2
-LIBS = -L/usr/lib -lc -L${X11LIB} -lX11 -lXtst
+LIBS = -L/usr/lib -lc -L${X11LIB} -lX11 -lXtst -lfontconfig -lXft ${XINERAMALIBS}
 
 # flags
-CPPFLAGS = -DVERSION=\"${VERSION}\" \
+CPPFLAGS = -DVERSION=\"${VERSION}\" ${XINERAMAFLAGS}
-	   ${XINERAMAFLAGS}
 CFLAGS = -g -std=c99 -pedantic -Wall -Os ${INCS} ${CPPFLAGS}
 LDFLAGS = -g ${LIBS}
 

drw.c

@@ -0,0 +1,417 @@
+/* See LICENSE file for copyright and license details. */
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <X11/Xlib.h>
+#include <X11/Xft/Xft.h>
+
+#include "drw.h"
+#include "util.h"
+
+#define UTF_INVALID 0xFFFD
+#define UTF_SIZ     4
+
+static const unsigned char utfbyte[UTF_SIZ + 1] = {0x80,    0, 0xC0, 0xE0, 0xF0};
+static const unsigned char utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
+static const long utfmin[UTF_SIZ + 1] = {       0,    0,  0x80,  0x800,  0x10000};
+static const long utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
+
+static long
+utf8decodebyte(const char c, size_t *i)
+{
+	for (*i = 0; *i < (UTF_SIZ + 1); ++(*i))
+		if (((unsigned char)c & utfmask[*i]) == utfbyte[*i])
+			return (unsigned char)c & ~utfmask[*i];
+	return 0;
+}
+
+static size_t
+utf8validate(long *u, size_t i)
+{
+	if (!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF))
+		*u = UTF_INVALID;
+	for (i = 1; *u > utfmax[i]; ++i)
+		;
+	return i;
+}
+
+static size_t
+utf8decode(const char *c, long *u, size_t clen)
+{
+	size_t i, j, len, type;
+	long udecoded;
+
+	*u = UTF_INVALID;
+	if (!clen)
+		return 0;
+	udecoded = utf8decodebyte(c[0], &len);
+	if (!BETWEEN(len, 1, UTF_SIZ))
+		return 1;
+	for (i = 1, j = 1; i < clen && j < len; ++i, ++j) {
+		udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
+		if (type)
+			return j;
+	}
+	if (j < len)
+		return 0;
+	*u = udecoded;
+	utf8validate(u, len);
+
+	return len;
+}
+
+Drw *
+drw_create(Display *dpy, int screen, Window root, unsigned int w, unsigned int h)
+{
+	Drw *drw = ecalloc(1, sizeof(Drw));
+
+	drw->dpy = dpy;
+	drw->screen = screen;
+	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);
+	XSetLineAttributes(dpy, drw->gc, 1, LineSolid, CapButt, JoinMiter);
+
+	return drw;
+}
+
+void
+drw_resize(Drw *drw, unsigned int w, unsigned int h)
+{
+	if (!drw)
+		return;
+
+	drw->w = w;
+	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));
+}
+
+void
+drw_free(Drw *drw)
+{
+	XFreePixmap(drw->dpy, drw->drawable);
+	XFreeGC(drw->dpy, drw->gc);
+	drw_fontset_free(drw->fonts);
+	free(drw);
+}
+
+/* This function is an implementation detail. Library users should use
+ * drw_fontset_create instead.
+ */
+static Fnt *
+xfont_create(Drw *drw, const char *fontname, FcPattern *fontpattern)
+{
+	Fnt *font;
+	XftFont *xfont = NULL;
+	FcPattern *pattern = NULL;
+
+	if (fontname) {
+		/* Using the pattern found at font->xfont->pattern does not yield the
+		 * same substitution results as using the pattern returned by
+		 * FcNameParse; using the latter results in the desired fallback
+		 * behaviour whereas the former just results in missing-character
+		 * rectangles being drawn, at least with some fonts. */
+		if (!(xfont = XftFontOpenName(drw->dpy, drw->screen, fontname))) {
+			fprintf(stderr, "error, cannot load font from name: '%s'\n", fontname);
+			return NULL;
+		}
+		if (!(pattern = FcNameParse((FcChar8 *) fontname))) {
+			fprintf(stderr, "error, cannot parse font name to pattern: '%s'\n", fontname);
+			XftFontClose(drw->dpy, xfont);
+			return NULL;
+		}
+	} else if (fontpattern) {
+		if (!(xfont = XftFontOpenPattern(drw->dpy, fontpattern))) {
+			fprintf(stderr, "error, cannot load font from pattern.\n");
+			return NULL;
+		}
+	} else {
+		die("no font specified.");
+	}
+
+	/* Do not allow using color fonts. This is a workaround for a BadLength
+	 * error from Xft with color glyphs. Modelled on the Xterm workaround. See
+	 * https://bugzilla.redhat.com/show_bug.cgi?id=1498269
+	 * https://lists.suckless.org/dev/1701/30932.html
+	 * https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=916349
+	 * and lots more all over the internet.
+	 */
+	FcBool iscol;
+	if(FcPatternGetBool(xfont->pattern, FC_COLOR, 0, &iscol) == FcResultMatch && iscol) {
+		XftFontClose(drw->dpy, xfont);
+		return NULL;
+	}
+
+	font = ecalloc(1, sizeof(Fnt));
+	font->xfont = xfont;
+	font->pattern = pattern;
+	font->h = xfont->ascent + xfont->descent;
+	font->dpy = drw->dpy;
+
+	return font;
+}
+
+static void
+xfont_free(Fnt *font)
+{
+	if (!font)
+		return;
+	if (font->pattern)
+		FcPatternDestroy(font->pattern);
+	XftFontClose(font->dpy, font->xfont);
+	free(font);
+}
+
+Fnt*
+drw_fontset_create(Drw* drw, const char *fonts[], size_t fontcount)
+{
+	Fnt *cur, *ret = NULL;
+	size_t i;
+
+	if (!drw || !fonts)
+		return NULL;
+
+	for (i = 1; i <= fontcount; i++) {
+		if ((cur = xfont_create(drw, fonts[fontcount - i], NULL))) {
+			cur->next = ret;
+			ret = cur;
+		}
+	}
+	return (drw->fonts = ret);
+}
+
+void
+drw_fontset_free(Fnt *font)
+{
+	if (font) {
+		drw_fontset_free(font->next);
+		xfont_free(font);
+	}
+}
+
+void
+drw_clr_create(Drw *drw, Clr *dest, const char *clrname)
+{
+	if (!drw || !dest || !clrname)
+		return;
+
+	if (!XftColorAllocName(drw->dpy, DefaultVisual(drw->dpy, drw->screen),
+	                       DefaultColormap(drw->dpy, drw->screen),
+	                       clrname, dest))
+		die("error, cannot allocate color '%s'", clrname);
+}
+
+/* Wrapper to create color schemes. The caller has to call free(3) on the
+ * returned color scheme when done using it. */
+Clr *
+drw_scm_create(Drw *drw, const char *clrnames[], size_t clrcount)
+{
+	size_t i;
+	Clr *ret;
+
+	/* need at least two colors for a scheme */
+	if (!drw || !clrnames || clrcount < 2 || !(ret = ecalloc(clrcount, sizeof(XftColor))))
+		die("error, cannot create color scheme (drw=%d) (clrcount=%d)", drw, clrcount);
+
+	for (i = 0; i < clrcount; i++)
+		drw_clr_create(drw, &ret[i], clrnames[i]);
+	return ret;
+}
+
+void
+drw_setfontset(Drw *drw, Fnt *set)
+{
+	if (drw)
+		drw->fonts = set;
+}
+
+void
+drw_setscheme(Drw *drw, Clr *scm)
+{
+	if (drw)
+		drw->scheme = scm;
+}
+
+void
+drw_rect(Drw *drw, int x, int y, unsigned int w, unsigned int h, int filled, int invert)
+{
+	if (!drw || !drw->scheme)
+		return;
+	XSetForeground(drw->dpy, drw->gc, invert ? drw->scheme[ColBg].pixel : drw->scheme[ColFg].pixel);
+	if (filled)
+		XFillRectangle(drw->dpy, drw->drawable, drw->gc, x, y, w, h);
+	else
+		XDrawRectangle(drw->dpy, drw->drawable, drw->gc, x, y, w - 1, h - 1);
+}
+
+int
+drw_text(Drw *drw, int x, int y, unsigned int w, unsigned int h, unsigned int lpad, const char *text, int invert)
+{
+	char buf[1024];
+	int ty;
+	unsigned int ew;
+	XftDraw *d = NULL;
+	Fnt *usedfont, *curfont, *nextfont;
+	size_t i, len;
+	int utf8strlen, utf8charlen, render = x || y || w || h;
+	long utf8codepoint = 0;
+	const char *utf8str;
+	FcCharSet *fccharset;
+	FcPattern *fcpattern;
+	FcPattern *match;
+	XftResult result;
+	int charexists = 0;
+
+	if (!drw || (render && !drw->scheme) || !text || !drw->fonts)
+		return 0;
+
+	if (!render) {
+		w = ~w;
+	} else {
+		XSetForeground(drw->dpy, drw->gc, drw->scheme[invert ? ColFg : ColBg].pixel);
+		XFillRectangle(drw->dpy, drw->drawable, drw->gc, x, y, w, h);
+		d = XftDrawCreate(drw->dpy, drw->drawable,
+		                  DefaultVisual(drw->dpy, drw->screen),
+		                  DefaultColormap(drw->dpy, drw->screen));
+		x += lpad;
+		w -= lpad;
+	}
+
+	usedfont = drw->fonts;
+	while (1) {
+		utf8strlen = 0;
+		utf8str = text;
+		nextfont = NULL;
+		while (*text) {
+			utf8charlen = utf8decode(text, &utf8codepoint, UTF_SIZ);
+			for (curfont = drw->fonts; curfont; curfont = curfont->next) {
+				charexists = charexists || XftCharExists(drw->dpy, curfont->xfont, utf8codepoint);
+				if (charexists) {
+					if (curfont == usedfont) {
+						utf8strlen += utf8charlen;
+						text += utf8charlen;
+					} else {
+						nextfont = curfont;
+					}
+					break;
+				}
+			}
+
+			if (!charexists || nextfont)
+				break;
+			else
+				charexists = 0;
+		}
+
+		if (utf8strlen) {
+			drw_font_getexts(usedfont, utf8str, utf8strlen, &ew, NULL);
+			/* shorten text if necessary */
+			for (len = MIN(utf8strlen, sizeof(buf) - 1); len && ew > w; len--)
+				drw_font_getexts(usedfont, utf8str, len, &ew, NULL);
+
+			if (len) {
+				memcpy(buf, utf8str, len);
+				buf[len] = '\0';
+				if (len < utf8strlen)
+					for (i = len; i && i > len - 3; buf[--i] = '.')
+						; /* NOP */
+
+				if (render) {
+					ty = y + (h - usedfont->h) / 2 + usedfont->xfont->ascent;
+					XftDrawStringUtf8(d, &drw->scheme[invert ? ColBg : ColFg],
+					                  usedfont->xfont, x, ty, (XftChar8 *)buf, len);
+				}
+				x += ew;
+				w -= ew;
+			}
+		}
+
+		if (!*text) {
+			break;
+		} else if (nextfont) {
+			charexists = 0;
+			usedfont = nextfont;
+		} else {
+			/* Regardless of whether or not a fallback font is found, the
+			 * character must be drawn. */
+			charexists = 1;
+
+			fccharset = FcCharSetCreate();
+			FcCharSetAddChar(fccharset, utf8codepoint);
+
+			if (!drw->fonts->pattern) {
+				/* Refer to the comment in xfont_create for more information. */
+				die("the first font in the cache must be loaded from a font string.");
+			}
+
+			fcpattern = FcPatternDuplicate(drw->fonts->pattern);
+			FcPatternAddCharSet(fcpattern, FC_CHARSET, fccharset);
+			FcPatternAddBool(fcpattern, FC_SCALABLE, FcTrue);
+			FcPatternAddBool(fcpattern, FC_COLOR, FcFalse);
+
+			FcConfigSubstitute(NULL, fcpattern, FcMatchPattern);
+			FcDefaultSubstitute(fcpattern);
+			match = XftFontMatch(drw->dpy, drw->screen, fcpattern, &result);
+
+			FcCharSetDestroy(fccharset);
+			FcPatternDestroy(fcpattern);
+
+			if (match) {
+				usedfont = xfont_create(drw, NULL, match);
+				if (usedfont && XftCharExists(drw->dpy, usedfont->xfont, utf8codepoint)) {
+					for (curfont = drw->fonts; curfont->next; curfont = curfont->next)
+						; /* NOP */
+					curfont->next = usedfont;
+				} else {
+					xfont_free(usedfont);
+					usedfont = drw->fonts;
+				}
+			}
+		}
+	}
+	if (d)
+		XftDrawDestroy(d);
+
+	return x + (render ? w : 0);
+}
+
+void
+drw_map(Drw *drw, Window win, int x, int y, unsigned int w, unsigned int h)
+{
+	if (!drw)
+		return;
+
+	XCopyArea(drw->dpy, drw->drawable, win, drw->gc, x, y, w, h, x, y);
+}
+
+void
+drw_sync(Drw *drw) {
+    XSync(drw->dpy, False);
+}
+
+unsigned int
+drw_fontset_getwidth(Drw *drw, const char *text)
+{
+	if (!drw || !drw->fonts || !text)
+		return 0;
+	return drw_text(drw, 0, 0, 0, 0, 0, text, 0);
+}
+
+void
+drw_font_getexts(Fnt *font, const char *text, unsigned int len, unsigned int *w, unsigned int *h)
+{
+	XGlyphInfo ext;
+
+	if (!font || !text)
+		return;
+
+	XftTextExtentsUtf8(font->dpy, font->xfont, (XftChar8 *)text, len, &ext);
+	if (w)
+		*w = ext.xOff;
+	if (h)
+		*h = font->h;
+}

drw.h

@@ -0,0 +1,51 @@
+/* See LICENSE file for copyright and license details. */
+
+typedef struct Fnt {
+	Display *dpy;
+	unsigned int h;
+	XftFont *xfont;
+	FcPattern *pattern;
+	struct Fnt *next;
+} Fnt;
+
+enum { ColFg, ColBg }; /* Clr scheme index */
+typedef XftColor Clr;
+
+typedef struct {
+	unsigned int w, h;
+	Display *dpy;
+	int screen;
+	Window root;
+	Drawable drawable;
+	GC gc;
+	Clr *scheme;
+	Fnt *fonts;
+} Drw;
+
+/* Drawable abstraction */
+Drw *drw_create(Display *dpy, int screen, Window win, unsigned int w, unsigned int h);
+void drw_resize(Drw *drw, unsigned int w, unsigned int h);
+void drw_free(Drw *drw);
+
+/* Fnt abstraction */
+Fnt *drw_fontset_create(Drw* drw, const char *fonts[], size_t fontcount);
+void drw_fontset_free(Fnt* set);
+unsigned int drw_fontset_getwidth(Drw *drw, const char *text);
+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);
+Clr *drw_scm_create(Drw *drw, const char *clrnames[], size_t clrcount);
+
+
+/* Drawing context manipulation */
+void drw_setfontset(Drw *drw, Fnt *set);
+void drw_setscheme(Drw *drw, Clr *scm);
+
+/* Drawing functions */
+void drw_rect(Drw *drw, int x, int y, unsigned int w, unsigned int h, int filled, int invert);
+int drw_text(Drw *drw, int x, int y, unsigned int w, unsigned int h, unsigned int lpad, const char *text, int invert);
+
+/* Map functions */
+void drw_map(Drw *drw, Window win, int x, int y, unsigned int w, unsigned int h);
+void drw_sync(Drw *drw);

layout.sxmo.h

@@ -37,20 +37,20 @@ static Key keys_en[40] = {
         { 0, XK_m, 1 },
         /*{ "/?", XK_slash, 1 },*/
         { "Tab", XK_Tab, 1 },
-        { "<-", XK_BackSpace, 2 },
+        { "⇍ Bksp", XK_BackSpace, 2 },
 
         { 0 }, /* New row */
-        { "Layer 2", XK_Cancel, 1},
+        { "↺", XK_Cancel, 1},
-        { "Shift", XK_Shift_L, 1 },
+        { "Shft", XK_Shift_L, 1 },
         /*{ "L", XK_Left, 1 },*/
-        { "D", XK_Down, 1 },
+        { "↓", XK_Down, 1 },
-        { "U", XK_Up, 1 },
+        { "↑", XK_Up, 1 },
         /*{ "R", XK_Right, 1 },*/
         { "", XK_space, 2 },
         { "Esc", XK_Escape, 1 },
         { "Ctrl", XK_Control_L, 1 },
         /*{ "Alt", XK_Alt_L, 1 },*/
-        { "Enter", XK_Return, 2 },
+        { "↲ Enter", XK_Return, 2 },
 };
 
 static Key keys_symbols[40] = {
@@ -80,28 +80,28 @@ static Key keys_symbols[40] = {
 
   { 0 }, /* New row */
 
-  { " ", XK_Shift_L|XK_bar, 1 },
+  { "", XK_Shift_L|XK_bar, 1 },
-  { " ", XK_Shift_L|XK_bar, 1 },
+  { "⇤", XK_Home, 1 },
-  { "L", XK_Left, 1 },
+  { "←", XK_Left, 1 },
-  { "R", XK_Right, 1 },
+  { "→", XK_Right, 1 },
-  { " ", XK_Shift_L|XK_bar, 1 },
+  { "⇥", XK_End, 1 },
-  { " ", XK_Shift_L|XK_bar, 1 },
+  { "⇊", XK_Next, 1 },
-  { " ", XK_Shift_L|XK_bar, 1 },
+  { "⇈", XK_Prior, 1 },
   { "Tab", XK_Tab, 1 },
-  { "<-", XK_BackSpace, 2 },
+  { "⇍ Bksp", XK_BackSpace, 2 },
 
   { 0 }, /* New row */
-  { "Layer 1", XK_Cancel, 1},
+  { "↺", XK_Cancel, 1},
-  { "Shift", XK_Shift_L, 1 },
+  { "Shft", XK_Shift_L, 1 },
   /*{ "L", XK_Left, 1 },*/
-  { "D", XK_Down, 1 },
+  { "↓", XK_Down, 1 },
-  { "U", XK_Up, 1 },
+  { "↑", XK_Up, 1 },
   /*{ "R", XK_Right, 1 },*/
   { "", XK_space, 2 },
   { "Esc", XK_Escape, 1 },
   { "Ctrl", XK_Control_L, 1 },
   /*{ "Alt", XK_Alt_L, 1 },*/
-  { "Enter", XK_Return, 2 },
+  { "↲ Enter", XK_Return, 2 },
 };
 
 Buttonmod buttonmods[] = {

svkbd.c

@@ -13,38 +13,30 @@
 #include <X11/Xutil.h>
 #include <X11/Xproto.h>
 #include <X11/extensions/XTest.h>
+#include <X11/Xft/Xft.h>
+#ifdef XINERAMA
+#include <X11/extensions/Xinerama.h>
+#endif
 #include <signal.h>
 #include <sys/select.h>
 
+#include "drw.h"
+#include "util.h"
+
+
 
 /* macros */
-#define MAX(a, b)       ((a) > (b) ? (a) : (b))
 #define LENGTH(x)       (sizeof x / sizeof x[0])
+#define TEXTW(X)        (drw_fontset_getwidth(drw, (X)))
 
 /* enums */
-enum { ColFG, ColBG, ColLast };
+enum { SchemeNorm, SchemePress, SchemeHighlight, SchemeLast };
 enum { NetWMWindowType, NetLast };
 
 /* typedefs */
 typedef unsigned int uint;
 typedef unsigned long ulong;
 
-typedef struct {
-	ulong norm[ColLast];
-	ulong press[ColLast];
-	ulong high[ColLast];
-
-	Drawable drawable;
-	GC gc;
-	struct {
-		int ascent;
-		int descent;
-		int height;
-		XFontSet set;
-		XFontStruct *xfont;
-	} font;
-} DC; /* draw context */
-
 typedef struct {
 	char *label;
 	KeySym keysym;
@@ -66,18 +58,15 @@ static void buttonrelease(XEvent *e);
 static void cleanup(void);
 static void configurenotify(XEvent *e);
 static void countrows();
-static void die(const char *errstr, ...);
 static void drawkeyboard(void);
 static void drawkey(Key *k);
 static void expose(XEvent *e);
 static Key *findkey(int x, int y);
-static ulong getcolor(const char *colstr);
-static void initfont(const char *fontstr);
 static void leavenotify(XEvent *e);
 static void press(Key *k, KeySym mod);
 static void run(void);
 static void setup(void);
-static int textnw(const char *text, uint len);
+static void togglelayer();
 static void unpress(Key *k, KeySym mod);
 static void updatekeys();
 
@@ -93,8 +82,9 @@ static void (*handler[LASTEvent]) (XEvent *) = {
 };
 static Atom netatom[NetLast];
 static Display *dpy;
-static DC dc;
+static Drw *drw;
 static Window root, win;
+static Clr* scheme[SchemeLast];
 static Bool running = True, isdock = False;
 static KeySym pressedmod = 0;
 static int rows = 0, ww = 0, wh = 0, wx = 0, wy = 0;
@@ -200,14 +190,12 @@ cleanup(void) {
 			XTestFakeKeyEvent(dpy, XKeysymToKeycode(dpy, keys[i].keysym), False, 0);
 		}
 	}
-	XSync(dpy, False);
 
-	if(dc.font.set)
+	for (i = 0; i < SchemeLast; i++)
-		XFreeFontSet(dpy, dc.font.set);
+		free(scheme[i]);
-	else
+	drw_free(drw);
-		XFreeFont(dpy, dc.font.xfont);
+	drw_sync(drw);
-	XFreePixmap(dpy, dc.drawable);
+	XSync(dpy, False);
-	XFreeGC(dpy, dc.gc);
 	XDestroyWindow(dpy, win);
 	XSync(dpy, False);
 	XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
@@ -220,9 +208,7 @@ configurenotify(XEvent *e) {
 	if(ev->window == win && (ev->width != ww || ev->height != wh)) {
 		ww = ev->width;
 		wh = ev->height;
-		XFreePixmap(dpy, dc.drawable);
+		drw_resize(drw, ww, wh);
-		dc.drawable = XCreatePixmap(dpy, root, ww, wh,
-				DefaultDepth(dpy, screen));
 		updatekeys();
 	}
 }
@@ -237,15 +223,6 @@ countrows() {
 	}
 }
 
-void
-die(const char *errstr, ...) {
-	va_list ap;
-
-	va_start(ap, errstr);
-	vfprintf(stderr, errstr, ap);
-	va_end(ap);
-	exit(EXIT_FAILURE);
-}
 
 void
 drawkeyboard(void) {
@@ -259,42 +236,29 @@ drawkeyboard(void) {
 
 void
 drawkey(Key *k) {
-	int x, y, h, len;
+	int x, y, w, h;
-	XRectangle r = { k->x, k->y, k->w, k->h};
 	const char *l;
-	ulong *col;
 
 	if(k->pressed)
-		col = dc.press;
+		drw_setscheme(drw, scheme[SchemePress]);
 	else if(k->highlighted)
-		col = dc.high;
+		drw_setscheme(drw, scheme[SchemeHighlight]);
 	else
-		col = dc.norm;
+		drw_setscheme(drw, scheme[SchemeNorm]);
+	drw_rect(drw, k->x, k->y, k->w, k->h, 1, 1);
+	drw_rect(drw, k->x, k->y, k->w, k->h, 0, 0);
 
-	XSetForeground(dpy, dc.gc, col[ColBG]);
-	XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
-	XSetForeground(dpy, dc.gc, dc.norm[ColFG]);
-	r.height -= 1;
-	r.width -= 1;
-	XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
-	XSetForeground(dpy, dc.gc, col[ColFG]);
 	if(k->label) {
 		l = k->label;
 	} else {
 		l = XKeysymToString(k->keysym);
 	}
-	len = strlen(l);
+	h = fontsize * 2;
-	h = dc.font.ascent + dc.font.descent;
+	y = k->y + (k->h / 2) - (h / 2);
-	y = k->y + (k->h / 2) - (h / 2) + dc.font.ascent;
+	w = TEXTW(l);
-	x = k->x + (k->w / 2) - (textnw(l, len) / 2);
+	x = k->x + (k->w / 2) - (w / 2);
-	if(dc.font.set) {
+	drw_text(drw, x, y, w, h, 0, l, 0);
-		XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, l,
+	drw_map(drw, win, k->x, k->y, k->w, k->h);
-				len);
-	} else {
-		XDrawString(dpy, dc.drawable, dc.gc, x, y, l, len);
-	}
-	XCopyArea(dpy, dc.drawable, win, dc.gc, k->x, k->y, k->w, k->h,
-			k->x, k->y);
 }
 
 void
@@ -319,52 +283,7 @@ findkey(int x, int y) {
 	return NULL;
 }
 
-ulong
-getcolor(const char *colstr) {
-	Colormap cmap = DefaultColormap(dpy, screen);
-	XColor color;
 
-	if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
-		die("error, cannot allocate color '%s'\n", colstr);
-	return color.pixel;
-}
-
-void
-initfont(const char *fontstr) {
-	char *def, **missing;
-	int i, n;
-
-	missing = NULL;
-	if(dc.font.set)
-		XFreeFontSet(dpy, dc.font.set);
-	dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
-	if(missing) {
-		while(n--)
-			fprintf(stderr, "svkbd: missing fontset: %s\n", missing[n]);
-		XFreeStringList(missing);
-	}
-	if(dc.font.set) {
-		XFontStruct **xfonts;
-		char **font_names;
-		dc.font.ascent = dc.font.descent = 0;
-		n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
-		for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
-			dc.font.ascent = MAX(dc.font.ascent, (*xfonts)->ascent);
-			dc.font.descent = MAX(dc.font.descent,(*xfonts)->descent);
-			xfonts++;
-		}
-	} else {
-		if(dc.font.xfont)
-			XFreeFont(dpy, dc.font.xfont);
-		dc.font.xfont = NULL;
-		if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
-		&& !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
-			die("error, cannot load font: '%s'\n", fontstr);
-		dc.font.ascent = dc.font.xfont->ascent;
-		dc.font.descent = dc.font.xfont->descent;
-	}
-	dc.font.height = dc.font.ascent + dc.font.descent;
-}
 
 void
 leavenotify(XEvent *e) {
@@ -484,15 +403,36 @@ setup(void) {
 	XSizeHints *sizeh = NULL;
 	XClassHint *ch;
 	Atom atype = -1;
-	int i, sh, sw;
+	int i, j, sh, sw;
 	XWMHints *wmh;
 
+	#if XINERAMA
+	XineramaScreenInfo *info = NULL;
+	#endif
+
 	/* init screen */
 	screen = DefaultScreen(dpy);
 	root = RootWindow(dpy, screen);
+	#if XINERAMA
+	if(XineramaIsActive(dpy)) {
+		info = XineramaQueryScreens(dpy, &i);
+		sw = info[0].width;
+		sh = info[0].height;
+		XFree(info);
+	} else
+	#endif
+	{
 		sw = DisplayWidth(dpy, screen);
 		sh = DisplayHeight(dpy, screen);
-	initfont(font);
+	}
+    drw = drw_create(dpy, screen, root, sw, sh);
+	if (!drw_fontset_create(drw, fonts, LENGTH(fonts)))
+		die("no fonts could be loaded.");
+    drw_setscheme(drw, scheme[SchemeNorm]);
+
+	/* init appearance */
+	for (j = 0; j < SchemeLast; j++)
+		scheme[j] = drw_scm_create(drw, colors[j], 2);
 
 	/* init atoms */
 	if(isdock) {
@@ -517,23 +457,12 @@ setup(void) {
 	if(wy < 0)
 		wy = sh + wy - wh;
 
-	dc.norm[ColBG] = getcolor(normbgcolor);
-	dc.norm[ColFG] = getcolor(normfgcolor);
-	dc.press[ColBG] = getcolor(pressbgcolor);
-	dc.press[ColFG] = getcolor(pressfgcolor);
-	dc.high[ColBG] = getcolor(highlightbgcolor);
-	dc.high[ColFG] = getcolor(highlightfgcolor);
-	dc.drawable = XCreatePixmap(dpy, root, ww, wh,
-			DefaultDepth(dpy, screen));
-	dc.gc = XCreateGC(dpy, root, 0, 0);
-	if(!dc.font.set)
-		XSetFont(dpy, dc.gc, dc.font.xfont->fid);
 	for(i = 0; i < LENGTH(keys); i++)
 		keys[i].pressed = 0;
 
 	wa.override_redirect = !wmborder;
-	wa.border_pixel = dc.norm[ColFG];
+	wa.border_pixel = scheme[SchemeNorm][ColFg].pixel;
-	wa.background_pixel = dc.norm[ColBG];
+	wa.background_pixel = scheme[SchemeNorm][ColBg].pixel;
 	win = XCreateWindow(dpy, root, wx, wy, ww, wh, 0,
 			    CopyFromParent, CopyFromParent, CopyFromParent,
 			    CWOverrideRedirect | CWBorderPixel |
@@ -572,20 +501,11 @@ setup(void) {
 	}
 
 	XMapRaised(dpy, win);
+	drw_resize(drw, ww, wh);
 	updatekeys();
 	drawkeyboard();
 }
 
-int
-textnw(const char *text, uint len) {
-	XRectangle r;
-
-	if(dc.font.set) {
-		XmbTextExtents(dc.font.set, text, len, NULL, &r);
-		return r.width;
-	}
-	return XTextWidth(dc.font.xfont, text, len);
-}
 
 void
 updatekeys() {
@@ -639,7 +559,7 @@ main(int argc, char *argv[]) {
 	signal(SIGTERM, sigterm);
 	for (i = 1; argv[i]; i++) {
 		if(!strcmp(argv[i], "-v")) {
-			die("svkbd-"VERSION", © 2006-2016 svkbd engineers,"
+			die("svkbd-"VERSION", © 2006-2020 svkbd engineers,"
 				       " see LICENSE for details\n");
 		} else if(!strcmp(argv[i], "-d")) {
 			isdock = True;

util.c

@@ -0,0 +1,35 @@
+/* See LICENSE file for copyright and license details. */
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "util.h"
+
+void *
+ecalloc(size_t nmemb, size_t size)
+{
+	void *p;
+
+	if (!(p = calloc(nmemb, size)))
+		die("calloc:");
+	return p;
+}
+
+void
+die(const char *fmt, ...) {
+	va_list ap;
+
+	va_start(ap, fmt);
+	vfprintf(stderr, fmt, ap);
+	va_end(ap);
+
+	if (fmt[0] && fmt[strlen(fmt)-1] == ':') {
+		fputc(' ', stderr);
+		perror(NULL);
+	} else {
+		fputc('\n', stderr);
+	}
+
+	exit(1);
+}

util.h

@@ -0,0 +1,8 @@
+/* See LICENSE file for copyright and license details. */
+
+#define MAX(A, B)               ((A) > (B) ? (A) : (B))
+#define MIN(A, B)               ((A) < (B) ? (A) : (B))
+#define BETWEEN(X, A, B)        ((A) <= (X) && (X) <= (B))
+
+void die(const char *fmt, ...);
+void *ecalloc(size_t nmemb, size_t size);