draw.c
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/* See LICENSE file for copyright and license details. */
#include <stdio.h>
#include <stdlib.h>
#include <string.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) {
Draw *draw = (Draw *)calloc(1, sizeof(Draw));
draw->dpy = dpy;
draw->screen = screen;
draw->win = win;
draw->w = w;
draw->h = h;
draw->drawable = XCreatePixmap(dpy, win, w, h, DefaultDepth(dpy, screen));
draw->gc = XCreateGC(dpy, win, 0, NULL);
XSetLineAttributes(dpy, draw->gc, 1, LineSolid, CapButt, JoinMiter);
return draw;
}
void
draw_resize(Draw *draw, unsigned int w, unsigned int h) {
if(!draw)
return;
draw->w = w;
draw->h = h;
XFreePixmap(draw->dpy, draw->drawable);
draw->drawable = XCreatePixmap(draw->dpy, draw->win, w, h, DefaultDepth(draw->dpy, draw->screen));
}
void
draw_free(Draw *draw) {
XFreePixmap(draw->dpy, draw->drawable);
XFreeGC(draw->dpy, draw->gc);
free(draw);
}
Fnt *
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
draw_font_free(Draw *draw, Fnt *font) {
if(!draw || !font)
return;
if(font->set)
XFreeFontSet(draw->dpy, font->set);
else
XFreeFont(draw->dpy, font->xfont);
free(font);
}
Col *
draw_col_create(Draw *draw, const char *colname) {
Col *col = (Col *)calloc(1, sizeof(Col));
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
draw_col_free(Draw *draw, Col *col) {
if(!col)
return;
free(col);
}
void
draw_setfont(Draw *draw, Fnt *font) {
if(!draw)
return;
draw->font = font;
}
void
draw_setfg(Draw *draw, Col *col) {
if(!draw)
return;
draw->fg = col;
}
void
draw_setbg(Draw *draw, Col *col) {
if(!draw)
return;
draw->bg = col;
}
void
draw_rect(Draw *draw, int x, int y, unsigned int w, unsigned int h, Bool filled, Bool empty, Bool invert) {
int dx;
if(!draw || !draw->font || !draw->fg || !draw->bg)
return;
XSetForeground(draw->dpy, draw->gc, invert ? draw->bg->rgb : draw->fg->rgb);
dx = (draw->font->ascent + draw->font->descent + 2) / 4;
if(filled)
XFillRectangle(draw->dpy, draw->drawable, draw->gc, x+1, y+1, dx+1, dx+1);
else if(empty)
XDrawRectangle(draw->dpy, draw->drawable, draw->gc, x+1, y+1, dx, dx);
}
void
draw_text(Draw *draw, int x, int y, unsigned int w, unsigned int h, const char *text, Bool invert) {
char buf[256];
int i, tx, ty, len, olen;
TextExtents tex;
if(!draw || !draw->fg || !draw->bg)
return;
XSetForeground(draw->dpy, draw->gc, invert ? draw->fg->rgb : draw->bg->rgb);
XFillRectangle(draw->dpy, draw->drawable, draw->gc, x, y, w, h);
if(!text || !draw->font)
return;
olen = strlen(text);
draw_getextents(draw, 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--)
draw_getextents(draw, text, len, &tex);
if(!len)
return;
memcpy(buf, text, len);
if(len < olen)
for(i = len; i && i > len - 3; buf[--i] = '.');
XSetForeground(draw->dpy, draw->gc, invert ? draw->bg->rgb : draw->fg->rgb);
if(draw->font->set)
XmbDrawString(draw->dpy, draw->drawable, draw->font->set, draw->gc, tx, ty, buf, len);
else
XDrawString(draw->dpy, draw->drawable, draw->gc, tx, ty, buf, len);
}
void
draw_map(Draw *draw, int x, int y, unsigned int w, unsigned int h) {
if(!draw)
return;
XCopyArea(draw->dpy, draw->drawable, draw->win, draw->gc, x, y, w, h, x, y);
XSync(draw->dpy, False);
}
void
draw_getextents(Draw *draw, const char *text, unsigned int len, TextExtents *extents) {
XRectangle r;
if(!draw || !draw->font || !text)
return;
if(draw->font->set) {
XmbTextExtents(draw->font->set, text, len, NULL, &r);
extents->xOff = r.x;
extents->yOff = r.y;
extents->w = r.width;
extents->h = r.height;
}
else {
extents->h = draw->font->ascent + draw->font->descent;
extents->w = XTextWidth(draw->font->xfont, text, len);
extents->xOff = extents->h / 2;
extents->yOff = (extents->h / 2) + draw->font->ascent;
}
}