Use libdraw: add Xft and fallback-fonts support to graphics lib
- libdraw, util: add drw.{c,h}, util.{c,h} and update code.
- libdraw: fix drw_rect(): use w and h parameter.
- libdraw: print errstr if last character in string was ":" (sbase).
- libdraw: drw_clr_free() allow valid free(NULL).
- config.def.h: set default font to monospace.
- cleanup() on exit.
- LICENSE: update license string for dmenu -v to 2015.
- LICENSE: add myself to LICENSE
This commit is contained in:
Hiltjo Posthuma
committed by
Anselm R Garbe
Anselm R Garbe
parent
13a529ce63
commit
4b1fecd44e
413
drw.c
Normal file
413
drw.c
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@ -0,0 +1,413 @@
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/* See LICENSE file for copyright and license details. */
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <X11/Xlib.h>
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#include <X11/Xft/Xft.h>
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#include "drw.h"
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#include "util.h"
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#define UTF_INVALID 0xFFFD
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#define UTF_SIZ 4
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static const unsigned char utfbyte[UTF_SIZ + 1] = {0x80, 0, 0xC0, 0xE0, 0xF0};
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static const unsigned char utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
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static const long utfmin[UTF_SIZ + 1] = { 0, 0, 0x80, 0x800, 0x10000};
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static const long utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
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static long
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utf8decodebyte(const char c, size_t *i) {
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for(*i = 0; *i < (UTF_SIZ + 1); ++(*i))
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if(((unsigned char)c & utfmask[*i]) == utfbyte[*i])
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return (unsigned char)c & ~utfmask[*i];
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return 0;
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}
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static size_t
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utf8validate(long *u, size_t i) {
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if(!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF))
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*u = UTF_INVALID;
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for(i = 1; *u > utfmax[i]; ++i)
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;
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return i;
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}
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static size_t
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utf8decode(const char *c, long *u, size_t clen) {
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size_t i, j, len, type;
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long udecoded;
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*u = UTF_INVALID;
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if(!clen)
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return 0;
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udecoded = utf8decodebyte(c[0], &len);
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if(!BETWEEN(len, 1, UTF_SIZ))
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return 1;
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for(i = 1, j = 1; i < clen && j < len; ++i, ++j) {
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udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
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if(type != 0)
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return j;
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}
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if(j < len)
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return 0;
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*u = udecoded;
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utf8validate(u, len);
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return len;
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}
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Drw *
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drw_create(Display *dpy, int screen, Window root, unsigned int w, unsigned int h) {
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Drw *drw = (Drw *)calloc(1, sizeof(Drw));
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if(!drw)
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return NULL;
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drw->dpy = dpy;
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drw->screen = screen;
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drw->root = root;
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drw->w = w;
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drw->h = h;
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drw->drawable = XCreatePixmap(dpy, root, w, h, DefaultDepth(dpy, screen));
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drw->gc = XCreateGC(dpy, root, 0, NULL);
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drw->fontcount = 0;
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XSetLineAttributes(dpy, drw->gc, 1, LineSolid, CapButt, JoinMiter);
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return drw;
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}
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void
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drw_resize(Drw *drw, unsigned int w, unsigned int h) {
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if(!drw)
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return;
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drw->w = w;
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drw->h = h;
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if(drw->drawable != 0)
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XFreePixmap(drw->dpy, drw->drawable);
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drw->drawable = XCreatePixmap(drw->dpy, drw->root, w, h, DefaultDepth(drw->dpy, drw->screen));
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}
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void
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drw_free(Drw *drw) {
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size_t i;
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for (i = 0; i < drw->fontcount; i++) {
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drw_font_free(drw->fonts[i]);
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}
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XFreePixmap(drw->dpy, drw->drawable);
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XFreeGC(drw->dpy, drw->gc);
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free(drw);
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}
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/* This function is an implementation detail. Library users should use
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* drw_font_create instead.
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*/
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static Fnt *
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drw_font_xcreate(Drw *drw, const char *fontname, FcPattern *fontpattern) {
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Fnt *font;
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if (!(fontname || fontpattern))
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die("No font specified.\n");
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if (!(font = (Fnt *)calloc(1, sizeof(Fnt))))
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return NULL;
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if (fontname) {
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/* Using the pattern found at font->xfont->pattern does not yield same
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* the same substitution results as using the pattern returned by
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* FcNameParse; using the latter results in the desired fallback
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* behaviour whereas the former just results in
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* missing-character-rectangles being drawn, at least with some fonts.
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*/
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if (!(font->xfont = XftFontOpenName(drw->dpy, drw->screen, fontname)) ||
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!(font->pattern = FcNameParse((FcChar8 *) fontname))) {
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if (font->xfont) {
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XftFontClose(drw->dpy, font->xfont);
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font->xfont = NULL;
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}
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fprintf(stderr, "error, cannot load font: '%s'\n", fontname);
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}
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} else if (fontpattern) {
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if (!(font->xfont = XftFontOpenPattern(drw->dpy, fontpattern))) {
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fprintf(stderr, "error, cannot load font pattern.\n");
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} else {
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font->pattern = NULL;
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}
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}
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if (!font->xfont) {
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free(font);
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return NULL;
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}
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font->ascent = font->xfont->ascent;
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font->descent = font->xfont->descent;
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font->h = font->ascent + font->descent;
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font->dpy = drw->dpy;
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return font;
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}
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Fnt*
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drw_font_create(Drw *drw, const char *fontname) {
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return drw_font_xcreate(drw, fontname, NULL);
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}
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void
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drw_load_fonts(Drw* drw, const char *fonts[], size_t fontcount) {
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size_t i;
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Fnt *font;
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for (i = 0; i < fontcount; i++) {
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if (drw->fontcount >= DRW_FONT_CACHE_SIZE) {
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die("Font cache exhausted.\n");
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} else if ((font = drw_font_xcreate(drw, fonts[i], NULL))) {
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drw->fonts[drw->fontcount++] = font;
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}
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}
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}
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void
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drw_font_free(Fnt *font) {
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if(!font)
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return;
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if(font->pattern)
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FcPatternDestroy(font->pattern);
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XftFontClose(font->dpy, font->xfont);
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free(font);
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}
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Clr *
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drw_clr_create(Drw *drw, const char *clrname) {
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Clr *clr;
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Colormap cmap;
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Visual *vis;
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if(!drw)
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return NULL;
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clr = (Clr *)calloc(1, sizeof(Clr));
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if(!clr)
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return NULL;
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cmap = DefaultColormap(drw->dpy, drw->screen);
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vis = DefaultVisual(drw->dpy, drw->screen);
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if(!XftColorAllocName(drw->dpy, vis, cmap, clrname, &clr->rgb))
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die("error, cannot allocate color '%s'\n", clrname);
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clr->pix = clr->rgb.pixel;
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return clr;
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}
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void
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drw_clr_free(Clr *clr) {
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free(clr);
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}
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void
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drw_setscheme(Drw *drw, ClrScheme *scheme) {
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if(!drw)
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return;
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drw->scheme = scheme;
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}
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void
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drw_rect(Drw *drw, int x, int y, unsigned int w, unsigned int h, int filled, int empty, int invert) {
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if(!drw || !drw->scheme)
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return;
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XSetForeground(drw->dpy, drw->gc, invert ? drw->scheme->bg->pix : drw->scheme->fg->pix);
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if(filled)
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XFillRectangle(drw->dpy, drw->drawable, drw->gc, x, y, w + 1, h + 1);
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else if(empty)
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XDrawRectangle(drw->dpy, drw->drawable, drw->gc, x, y, w, h);
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}
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int
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drw_text(Drw *drw, int x, int y, unsigned int w, unsigned int h, const char *text, int invert) {
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char buf[1024];
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int tx, ty, th;
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Extnts tex;
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Colormap cmap;
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Visual *vis;
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XftDraw *d;
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Fnt *curfont, *nextfont;
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size_t i, len;
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int utf8strlen, utf8charlen, render;
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long utf8codepoint = 0;
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const char *utf8str;
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FcCharSet *fccharset;
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FcPattern *fcpattern;
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FcPattern *match;
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XftResult result;
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int charexists = 0;
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if (!(render = x || y || w || h)) {
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w = ~w;
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}
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if (!drw || !drw->scheme) {
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return 0;
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} else if (render) {
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XSetForeground(drw->dpy, drw->gc, invert ? drw->scheme->fg->pix : drw->scheme->bg->pix);
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XFillRectangle(drw->dpy, drw->drawable, drw->gc, x, y, w, h);
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}
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if (!text || !drw->fontcount) {
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return 0;
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} else if (render) {
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cmap = DefaultColormap(drw->dpy, drw->screen);
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vis = DefaultVisual(drw->dpy, drw->screen);
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d = XftDrawCreate(drw->dpy, drw->drawable, vis, cmap);
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}
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curfont = drw->fonts[0];
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while (1) {
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utf8strlen = 0;
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utf8str = text;
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nextfont = NULL;
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while (*text) {
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utf8charlen = utf8decode(text, &utf8codepoint, UTF_SIZ);
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for (i = 0; i < drw->fontcount; i++) {
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charexists = charexists || XftCharExists(drw->dpy, drw->fonts[i]->xfont, utf8codepoint);
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if (charexists) {
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if (drw->fonts[i] == curfont) {
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utf8strlen += utf8charlen;
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text += utf8charlen;
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} else {
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nextfont = drw->fonts[i];
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}
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break;
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}
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}
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if (!charexists || (nextfont && nextfont != curfont)) {
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break;
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} else {
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charexists = 0;
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}
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}
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if (utf8strlen) {
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drw_font_getexts(curfont, utf8str, utf8strlen, &tex);
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/* shorten text if necessary */
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for(len = MIN(utf8strlen, (sizeof buf) - 1); len && (tex.w > w - drw->fonts[0]->h || w < drw->fonts[0]->h); len--)
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drw_font_getexts(curfont, utf8str, len, &tex);
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if (len) {
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memcpy(buf, utf8str, len);
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buf[len] = '\0';
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if(len < utf8strlen)
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for(i = len; i && i > len - 3; buf[--i] = '.');
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if (render) {
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th = curfont->ascent + curfont->descent;
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ty = y + (h / 2) - (th / 2) + curfont->ascent;
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tx = x + (h / 2);
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XftDrawStringUtf8(d, invert ? &drw->scheme->bg->rgb : &drw->scheme->fg->rgb, curfont->xfont, tx, ty, (XftChar8 *)buf, len);
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}
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x += tex.w;
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w -= tex.w;
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}
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}
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if (!*text) {
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break;
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} else if (nextfont) {
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charexists = 0;
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curfont = nextfont;
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} else {
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/* Regardless of whether or not a fallback font is found, the
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* character must be drawn.
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*/
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charexists = 1;
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if (drw->fontcount >= DRW_FONT_CACHE_SIZE) {
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continue;
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}
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fccharset = FcCharSetCreate();
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FcCharSetAddChar(fccharset, utf8codepoint);
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if (!drw->fonts[0]->pattern) {
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/* Refer to the comment in drw_font_xcreate for more
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* information.
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*/
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die("The first font in the cache must be loaded from a font string.\n");
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}
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fcpattern = FcPatternDuplicate(drw->fonts[0]->pattern);
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FcPatternAddCharSet(fcpattern, FC_CHARSET, fccharset);
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FcPatternAddBool(fcpattern, FC_SCALABLE, FcTrue);
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FcConfigSubstitute(NULL, fcpattern, FcMatchPattern);
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FcDefaultSubstitute(fcpattern);
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match = XftFontMatch(drw->dpy, drw->screen, fcpattern, &result);
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FcCharSetDestroy(fccharset);
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FcPatternDestroy(fcpattern);
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if (match) {
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curfont = drw_font_xcreate(drw, NULL, match);
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if (curfont && XftCharExists(drw->dpy, curfont->xfont, utf8codepoint)) {
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drw->fonts[drw->fontcount++] = curfont;
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} else {
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if (curfont) {
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drw_font_free(curfont);
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}
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curfont = drw->fonts[0];
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}
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}
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}
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}
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if (render) {
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XftDrawDestroy(d);
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}
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return x;
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}
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void
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drw_map(Drw *drw, Window win, int x, int y, unsigned int w, unsigned int h) {
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if(!drw)
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return;
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XCopyArea(drw->dpy, drw->drawable, win, drw->gc, x, y, w, h, x, y);
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XSync(drw->dpy, False);
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}
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void
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drw_font_getexts(Fnt *font, const char *text, unsigned int len, Extnts *tex) {
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XGlyphInfo ext;
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if(!font || !text)
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return;
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XftTextExtentsUtf8(font->dpy, font->xfont, (XftChar8 *)text, len, &ext);
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tex->h = font->h;
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tex->w = ext.xOff;
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}
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unsigned int
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drw_font_getexts_width(Fnt *font, const char *text, unsigned int len) {
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Extnts tex;
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if(!font)
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return -1;
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drw_font_getexts(font, text, len, &tex);
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return tex.w;
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}
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Cur *
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drw_cur_create(Drw *drw, int shape) {
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Cur *cur;
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if(!drw)
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return NULL;
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cur = (Cur *)calloc(1, sizeof(Cur));
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if (!cur)
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return NULL;
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cur->cursor = XCreateFontCursor(drw->dpy, shape);
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return cur;
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}
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void
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drw_cur_free(Drw *drw, Cur *cursor) {
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if(!drw || !cursor)
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return;
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XFreeCursor(drw->dpy, cursor->cursor);
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free(cursor);
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}
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