continued with draw.c abstraction, also started util.{h,c} implementation, that will be used by draw.c as well

Makefile

@@ -3,7 +3,7 @@
 
 include config.mk
 
-SRC = draw.c dwm.c
+SRC = util.c draw.c dwm.c
 OBJ = ${SRC:.c=.o}
 
 all: options dwm

draw.c

@@ -1,8 +1,10 @@
 /* See LICENSE file for copyright and license details. */
+#include <stdio.h>
 #include <stdlib.h>
 #include <X11/Xlib.h>
 
 #include "draw.h"
+#include "util.h"
 
 Draw *
 draw_create(Display *dpy, int screen, Window win, unsigned int w, unsigned int h) {
@@ -36,32 +38,70 @@ draw_free(Draw *draw) {
 }
 
 Fnt *
-font_create(const char *fontname) {
-	Fnt *font = (Fnt *)calloc(1, sizeof(Fnt));
-	/* TODO: allocate actual font */
+draw_font_create(Draw *draw, const char *fontname) {
+	Fnt *font;
+	char *def, **missing;
+	int n;
+
+	if(!draw)
+		return NULL;
+	font = (Fnt *)calloc(1, sizeof(Fnt));
+	font->set = XCreateFontSet(draw->dpy, fontname, &missing, &n, &def);
+	if(missing) {
+		while(n--)
+			fprintf(stderr, "draw: missing fontset: %s\n", missing[n]);
+		XFreeStringList(missing);
+	}
+	if(font->set) {
+		XFontStruct **xfonts;
+		char **font_names;
+
+		XExtentsOfFontSet(font->set);
+		n = XFontsOfFontSet(font->set, &xfonts, &font_names);
+		while(n--) {
+			font->ascent = MAX(font->ascent, (*xfonts)->ascent);
+			font->descent = MAX(font->descent,(*xfonts)->descent);
+			xfonts++;
+		}
+	}
+	else {
+		if(!(font->xfont = XLoadQueryFont(draw->dpy, fontname))
+		&& !(font->xfont = XLoadQueryFont(draw->dpy, "fixed")))
+			die("error, cannot load font: '%s'\n", fontname);
+		font->ascent = font->xfont->ascent;
+		font->descent = font->xfont->descent;
+	}
+	font->h = font->ascent + font->descent;
 	return font;
 }
 
 void
-font_free(Fnt *font) {
-	if(!font)
+draw_font_free(Draw *draw, Fnt *font) {
+	if(!draw || !font)
 		return;
-	/* TODO: deallocate any font resources */
+	if(font->set)
+		XFreeFontSet(draw->dpy, font->set);
+	else
+		XFreeFont(draw->dpy, font->xfont);
 	free(font);
 }
 
 Col *
-col_create(const char *colname) {
+draw_col_create(Draw *draw, const char *colname) {
 	Col *col = (Col *)calloc(1, sizeof(Col));
-	/* TODO: allocate color */
+	Colormap cmap = DefaultColormap(draw->dpy, draw->screen);
+	XColor color;
+
+	if(!XAllocNamedColor(draw->dpy, cmap, colname, &color, &color))
+		die("error, cannot allocate color '%s'\n", colname);
+	col->rgb = color.pixel;
 	return col;
 }
 
 void
-col_free(Col *col) {
+draw_col_free(Draw *draw, Col *col) {
 	if(!col)
 		return;
-	/* TODO: deallocate any color resource */
 	free(col);
 }
 

draw.h

@@ -8,7 +8,7 @@ typedef struct _XCol Col;
 struct _XFont {
 	int ascent;
 	int descent;
-	unsigned int h, w;
+	unsigned int h;
 	XFontSet set;
 	XFontStruct *xfont;
 };
@@ -45,12 +45,12 @@ void draw_resize(Draw *draw, unsigned int w, unsigned int h);
 void draw_free(Draw *draw);
 
 /* Fnt abstraction */
-Fnt *font_create(const char *fontname);
-void font_free(Fnt *font);
+Fnt *draw_font_create(Draw *draw, const char *fontname);
+void draw_font_free(Draw *draw, Fnt *font);
 
 /* Colour abstraction */
-Col *col_create(const char *colname);
-void col_free(Col *col);
+Col *draw_col_create(Draw *draw, const char *colname);
+void draw_col_free(Draw *draw, Col *col);
 
 /* Drawing context manipulation */
 void draw_setfont(Draw *draw, Fnt *font);

dwm.c

@@ -41,6 +41,7 @@
 #endif /* XINERAMA */
 
 #include "draw.h"
+#include "util.h"
 
 /* macros */
 #define BUTTONMASK              (ButtonPressMask|ButtonReleaseMask)
@@ -49,8 +50,6 @@
                                * MAX(0, MIN((y)+(h),(m)->wy+(m)->wh) - MAX((y),(m)->wy)))
 #define ISVISIBLE(C)            ((C->tags & C->mon->tagset[C->mon->seltags]))
 #define LENGTH(X)               (sizeof X / sizeof X[0])
-#define MAX(A, B)               ((A) > (B) ? (A) : (B))
-#define MIN(A, B)               ((A) < (B) ? (A) : (B))
 #define MOUSEMASK               (BUTTONMASK|PointerMotionMask)
 #define WIDTH(X)                ((X)->w + 2 * (X)->bw)
 #define HEIGHT(X)               ((X)->h + 2 * (X)->bw)
@@ -176,7 +175,6 @@ static Monitor *createmon(void);
 static void destroynotify(XEvent *e);
 static void detach(Client *c);
 static void detachstack(Client *c);
-static void die(const char *errstr, ...);
 static Monitor *dirtomon(int dir);
 static void drawbar(Monitor *m);
 static void drawbars(void);
@@ -695,16 +693,6 @@ detachstack(Client *c) {
 	}
 }
 
-void
-die(const char *errstr, ...) {
-	va_list ap;
-
-	va_start(ap, errstr);
-	vfprintf(stderr, errstr, ap);
-	va_end(ap);
-	exit(EXIT_FAILURE);
-}
-
 Monitor *
 dirtomon(int dir) {
 	Monitor *m = NULL;

util.c

@@ -0,0 +1,17 @@
+/* See LICENSE file for copyright and license details. */
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "util.h"
+
+void
+die(const char *errstr, ...) {
+	va_list ap;
+
+	va_start(ap, errstr);
+	vfprintf(stderr, errstr, ap);
+	va_end(ap);
+	exit(EXIT_FAILURE);
+}
+

util.h

@@ -0,0 +1,6 @@
+/* See LICENSE file for copyright and license details. */
+
+#define MAX(A, B)               ((A) > (B) ? (A) : (B))
+#define MIN(A, B)               ((A) < (B) ? (A) : (B))
+
+void die(const char *errstr, ...);