starting with initial draw.h

draw.h

@@ -0,0 +1,76 @@
+/* See LICENSE file for copyright and license details. */
+
+/* X11 types - begin */
+struct _XDraw {
+	unsigned int w, h;
+	Display *dpy;
+	Drawable drawable;
+	GC gc;
+};
+typedef struct _XDraw Draw;
+
+struct _XCol {
+	unsigned long rgb;
+};
+typedef struct _XCol Col;
+
+struct _XFont {
+	int ascent;
+	int descent;
+	unsigned int h, w;
+	XFontSet set;
+	XFontStruct *xfont;
+};
+typedef struct _XFont Fnt;
+/* X11 types - end */
+
+typedef struct {
+	Draw *draw;
+	Col *fg;
+	Col *bg;
+	Fnt *font;
+	Bool fill;
+} DDC;
+
+typedef struct {
+	unsigned int w;
+	unsigned int h;
+	int x;
+	int y;
+	int xOff;
+	int yOff;
+} TextExtents;
+
+/* Drawable abstraction */
+Draw *draw_create(Display *dpy, Window win, unsigned int w, unsigned int h);
+void draw_resize(Draw *draw, unsigned int w, unsigned int h);
+void draw_free(Draw *draw);
+
+/* Drawing context abstraction */
+DDC *dc_create(Draw *draw);
+void dc_free(DDC *dc);
+
+/* Fnt abstraction */
+Fnt *font_create(const char *fontname);
+void font_free(Fnt *font);
+
+/* Colour abstraction */
+Col *col_create(const char *colname);
+void col_free(Col *col);
+
+/* Drawing context manipulation */
+void dc_setfont(DDC *dc, Fnt *font);
+void dc_setfg(DDC *dc, Col col);
+void dc_setbg(DDC *dc, Col col);
+void dc_setfill(DDC *dc, Bool fill);
+
+/* Drawing functions */
+void dc_drawrect(DDC *dc, int x, int y, unsigned int w, unsigned int h);
+void dc_drawtext(DDC *dc, int x, int y, const char *text);
+
+/* Map functions */
+void dc_map(DDC *dc, int x, int y, unsigned int w, unsigned int h);
+
+/* Text functions */
+void dc_getextents(DDC *dc, const char *text, TextExtents *extents);
+

dwm.c

@@ -43,6 +43,8 @@
 #include <X11/extensions/Xinerama.h>
 #endif /* XINERAMA */
 
+#include "draw.h"
+
 /* macros */
 #define BUTTONMASK              (ButtonPressMask|ButtonReleaseMask)
 #define CLEANMASK(mask)         (mask & ~(numlockmask|LockMask) & (ShiftMask|ControlMask|Mod1Mask|Mod2Mask|Mod3Mask|Mod4Mask|Mod5Mask))