initial commit - libsl - draw back-ends for dwm, dmenu, etc
(HTM) git clone git://git.codemadness.org/libsl
(DIR) Log
(DIR) Files
(DIR) Refs
(DIR) LICENSE
---
(DIR) commit bfdec1e2d45497b6d53e366aa31e063214829023
(HTM) Author: Anselm R Garbe <anselm@garbe.us>
Date: Mon, 10 Dec 2012 10:04:58 +0100
initial commit
Diffstat:
A arg.h | 41 +++++++++++++++++++++++++++++++
A drw.c | 202 +++++++++++++++++++++++++++++++
A drw.h | 61 +++++++++++++++++++++++++++++++
A util.c | 17 +++++++++++++++++
A util.h | 6 ++++++
5 files changed, 327 insertions(+), 0 deletions(-)
---
(DIR) diff --git a/arg.h b/arg.h
@@ -0,0 +1,41 @@
+/*
+ * Copy me if you can.
+ * by 20h
+ */
+
+#ifndef __ARG_H__
+#define __ARG_H__
+
+extern char *argv0;
+
+#define USED(x) ((void)(x))
+
+#define ARGBEGIN for (argv0 = *argv, argv++, argc--;\
+ argv[0] && argv[0][1]\
+ && argv[0][0] == '-';\
+ argc--, argv++) {\
+ char _argc;\
+ char **_argv;\
+ if (argv[0][1] == '-' && argv[0][2] == '\0') {\
+ argv++;\
+ argc--;\
+ break;\
+ }\
+ for (argv[0]++, _argv = argv; argv[0][0];\
+ argv[0]++) {\
+ if (_argv != argv)\
+ break;\
+ _argc = argv[0][0];\
+ switch (_argc)
+
+#define ARGEND }\
+ USED(_argc);\
+ }\
+ USED(argv);\
+ USED(argc);
+
+#define EARGF(x) ((argv[1] == NULL)? ((x), abort(), (char *)0) :\
+ (argc--, argv++, argv[0]))
+
+#endif
+
(DIR) diff --git a/drw.c b/drw.c
@@ -0,0 +1,202 @@
+/* See LICENSE file for copyright and license details. */
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <X11/Xlib.h>
+
+#include "drw.h"
+#include "util.h"
+
+Drw *
+drw_create(Display *dpy, int screen, Window win, unsigned int w, unsigned int h) {
+ Drw *drw = (Drw *)calloc(1, sizeof(Drw));
+ drw->dpy = dpy;
+ drw->screen = screen;
+ drw->win = win;
+ drw->w = w;
+ drw->h = h;
+ drw->drwable = XCreatePixmap(dpy, win, w, h, DefaultDepth(dpy, screen));
+ drw->gc = XCreateGC(dpy, win, 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;
+ XFreePixmap(drw->dpy, drw->drwable);
+ drw->drwable = XCreatePixmap(drw->dpy, drw->win, w, h, DefaultDepth(drw->dpy, drw->screen));
+}
+
+void
+drw_free(Drw *drw) {
+ XFreePixmap(drw->dpy, drw->drwable);
+ XFreeGC(drw->dpy, drw->gc);
+ free(drw);
+}
+
+Fnt *
+drw_font_create(Drw *drw, const char *fontname) {
+ Fnt *font;
+ char *def, **missing;
+ int n;
+
+ if(!drw)
+ return NULL;
+ font = (Fnt *)calloc(1, sizeof(Fnt));
+ font->set = XCreateFontSet(drw->dpy, fontname, &missing, &n, &def);
+ if(missing) {
+ while(n--)
+ fprintf(stderr, "drw: 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(drw->dpy, fontname))
+ && !(font->xfont = XLoadQueryFont(drw->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
+drw_font_free(Drw *drw, Fnt *font) {
+ if(!drw || !font)
+ return;
+ if(font->set)
+ XFreeFontSet(drw->dpy, font->set);
+ else
+ XFreeFont(drw->dpy, font->xfont);
+ free(font);
+}
+
+Clr *
+drw_clr_create(Drw *drw, const char *clrname) {
+ Clr *clr = (Clr *)calloc(1, sizeof(Clr));
+ Colormap cmap = DefaultColormap(drw->dpy, drw->screen);
+ XColor color;
+
+ if(!XAllocNamedColor(drw->dpy, cmap, clrname, &color, &color))
+ die("error, cannot allocate color '%s'\n", clrname);
+ clr->rgb = color.pixel;
+ return clr;
+}
+
+void
+drw_clr_free(Drw *drw, Clr *clr) {
+ if(!clr)
+ return;
+ free(clr);
+}
+
+void
+drw_setfont(Drw *drw, Fnt *font) {
+ if(!drw)
+ return;
+ drw->font = font;
+}
+
+void
+drw_setfg(Drw *drw, Clr *clr) {
+ if(!drw)
+ return;
+ drw->fg = clr;
+}
+
+void
+drw_setbg(Drw *drw, Clr *clr) {
+ if(!drw)
+ return;
+ drw->bg = clr;
+}
+
+void
+drw_rect(Drw *drw, int x, int y, unsigned int w, unsigned int h, Bool filled, Bool empty, Bool invert) {
+ int dx;
+
+ if(!drw || !drw->font || !drw->fg || !drw->bg)
+ return;
+ XSetForeground(drw->dpy, drw->gc, invert ? drw->bg->rgb : drw->fg->rgb);
+ dx = (drw->font->ascent + drw->font->descent + 2) / 4;
+ if(filled)
+ XFillRectangle(drw->dpy, drw->drwable, drw->gc, x+1, y+1, dx+1, dx+1);
+ else if(empty)
+ XDrawRectangle(drw->dpy, drw->drwable, drw->gc, x+1, y+1, dx, dx);
+}
+
+void
+drw_text(Drw *drw, int x, int y, unsigned int w, unsigned int h, const char *text, Bool invert) {
+ char buf[256];
+ int i, tx, ty, len, olen;
+ Extnts tex;
+
+ if(!drw || !drw->fg || !drw->bg)
+ return;
+ XSetForeground(drw->dpy, drw->gc, invert ? drw->fg->rgb : drw->bg->rgb);
+ XFillRectangle(drw->dpy, drw->drwable, drw->gc, x, y, w, h);
+ if(!text || !drw->font)
+ return;
+ olen = strlen(text);
+ drw_getexts(drw, text, olen, &tex);
+ ty = y + (h / 2) - tex.yOff;
+ tx = x + tex.xOff;
+ /* shorten text if necessary */
+ for(len = MIN(olen, sizeof buf); len && tex.w > w - tex.h; len--)
+ drw_getexts(drw, text, len, &tex);
+ if(!len)
+ return;
+ memcpy(buf, text, len);
+ if(len < olen)
+ for(i = len; i && i > len - 3; buf[--i] = '.');
+ XSetForeground(drw->dpy, drw->gc, invert ? drw->bg->rgb : drw->fg->rgb);
+ if(drw->font->set)
+ XmbDrawString(drw->dpy, drw->drwable, drw->font->set, drw->gc, tx, ty, buf, len);
+ else
+ XDrawString(drw->dpy, drw->drwable, drw->gc, tx, ty, buf, len);
+}
+
+void
+drw_map(Drw *drw, int x, int y, unsigned int w, unsigned int h) {
+ if(!drw)
+ return;
+ XCopyArea(drw->dpy, drw->drwable, drw->win, drw->gc, x, y, w, h, x, y);
+ XSync(drw->dpy, False);
+}
+
+
+void
+drw_getexts(Drw *drw, const char *text, unsigned int len, Extnts *tex) {
+ XRectangle r;
+
+ if(!drw || !drw->font || !text)
+ return;
+ if(drw->font->set) {
+ XmbTextExtents(drw->font->set, text, len, NULL, &r);
+ tex->xOff = r.x;
+ tex->yOff = r.y;
+ tex->w = r.width;
+ tex->h = r.height;
+ }
+ else {
+ tex->h = drw->font->ascent + drw->font->descent;
+ tex->w = XTextWidth(drw->font->xfont, text, len);
+ tex->xOff = tex->h / 2;
+ tex->yOff = (tex->h / 2) + drw->font->ascent;
+ }
+}
(DIR) diff --git a/drw.h b/drw.h
@@ -0,0 +1,61 @@
+/* See LICENSE file for copyright and license details. */
+
+typedef struct {
+ unsigned long rgb;
+} Clr;
+
+typedef struct {
+ int ascent;
+ int descent;
+ unsigned int h;
+ XFontSet set;
+ XFontStruct *xfont;
+} Fnt;
+
+typedef struct {
+ unsigned int w, h;
+ Display *dpy;
+ int screen;
+ Window win;
+ Drawable drwable;
+ GC gc;
+ Clr *fg;
+ Clr *bg;
+ Fnt *font;
+} Drw;
+
+typedef struct {
+ unsigned int w;
+ unsigned int h;
+ int xOff;
+ int yOff;
+} Extnts;
+
+/* 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_font_create(Drw *drw, const char *fontname);
+void drw_font_free(Drw *drw, Fnt *font);
+
+/* Clrour abstraction */
+Clr *drw_clr_create(Drw *drw, const char *clrname);
+void drw_clr_free(Drw *drw, Clr *clr);
+
+/* Drawing context manipulation */
+void drw_setfont(Drw *drw, Fnt *font);
+void drw_setfg(Drw *drw, Clr *clr);
+void drw_setbg(Drw *drw, Clr *clr);
+
+/* Drawing functions */
+void drw_rect(Drw *drw, int x, int y, unsigned int w, unsigned int h, Bool filled, Bool empty, Bool invert);
+void drw_text(Drw *drw, int x, int y, unsigned int w, unsigned int h, const char *text, Bool invert);
+
+/* Map functions */
+void drw_map(Drw *drw, int x, int y, unsigned int w, unsigned int h);
+
+/* Text functions */
+void drw_getexts(Drw *drw, const char *text, unsigned int len, Extnts *extnts);
+
(DIR) diff --git a/util.c b/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);
+}
+
(DIR) diff --git a/util.h b/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, ...);