Adding fallback support to st.
This commit is contained in:
Christoph Lohmann
parent
082bab29f3
commit
9c44229c62
203
st.c
203
st.c
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@ -275,7 +275,9 @@ typedef struct {
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int descent;
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short lbearing;
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short rbearing;
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XftFont *set;
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XftFont *match;
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FcFontSet *set;
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FcPattern *pattern;
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} Font;
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/* Drawing Context */
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@ -338,10 +340,13 @@ static void xclear(int, int, int, int);
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static void xdrawcursor(void);
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static void xinit(void);
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static void xloadcols(void);
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static int xloadfont(Font *, FcPattern *);
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static void xloadfonts(char *, int);
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static void xresettitle(void);
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static void xseturgency(int);
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static void xsetsel(char*);
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static void xtermclear(int, int, int, int);
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static void xunloadfonts(void);
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static void xresize(int, int);
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static void expose(XEvent *);
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@ -350,7 +355,7 @@ static void unmap(XEvent *);
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static char *kmap(KeySym, uint);
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static void kpress(XEvent *);
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static void cmessage(XEvent *);
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static void cresize(int width, int height);
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static void cresize(int, int);
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static void resize(XEvent *);
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static void focus(XEvent *);
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static void brelease(XEvent *);
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@ -373,7 +378,7 @@ static int isfullutf8(char *, int);
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static ssize_t xwrite(int, char *, size_t);
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static void *xmalloc(size_t);
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static void *xrealloc(void *, size_t);
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static void *xcalloc(size_t nmemb, size_t size);
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static void *xcalloc(size_t, size_t);
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static void (*handler[LASTEvent])(XEvent *) = {
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[KeyPress] = kpress,
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@ -412,6 +417,28 @@ static char *opt_font = NULL;
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static char *usedfont = NULL;
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static int usedfontsize = 0;
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/* Font Ring Cache */
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enum {
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FRC_NORMAL,
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FRC_ITALIC,
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FRC_BOLD,
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FRC_ITALICBOLD
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};
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typedef struct {
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XftFont *font;
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long c;
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int flags;
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} Fontcache;
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/*
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* Fontcache is a ring buffer, with frccur as current position and frclen as
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* the current length of used elements.
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*/
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static Fontcache frc[256];
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static int frccur = 0, frclen = 0;
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ssize_t
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xwrite(int fd, char *s, size_t len) {
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size_t aux = len;
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@ -2282,20 +2309,28 @@ xloadfont(Font *f, FcPattern *pattern) {
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FcPattern *match;
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FcResult result;
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match = XftFontMatch(xw.dpy, xw.scr, pattern, &result);
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match = FcFontMatch(NULL, pattern, &result);
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if(!match)
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return 1;
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if(!(f->set = XftFontOpenPattern(xw.dpy, match))) {
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if(!(f->set = FcFontSort(0, match, FcTrue, 0, &result))) {
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FcPatternDestroy(match);
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return 1;
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}
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f->ascent = f->set->ascent;
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f->descent = f->set->descent;
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f->lbearing = 0;
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f->rbearing = f->set->max_advance_width;
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if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
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FcPatternDestroy(match);
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return 1;
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}
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f->height = f->set->height;
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f->pattern = FcPatternDuplicate(pattern);
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f->ascent = f->match->ascent;
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f->descent = f->match->descent;
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f->lbearing = 0;
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f->rbearing = f->match->max_advance_width;
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f->height = f->match->height;
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f->width = f->lbearing + f->rbearing;
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return 0;
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@ -2334,6 +2369,9 @@ xloadfonts(char *fontstr, int fontsize) {
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}
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}
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FcConfigSubstitute(0, pattern, FcMatchPattern);
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FcDefaultSubstitute(pattern);
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if(xloadfont(&dc.font, pattern))
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die("st: can't open font %s\n", fontstr);
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@ -2358,9 +2396,41 @@ xloadfonts(char *fontstr, int fontsize) {
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FcPatternDestroy(pattern);
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}
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void
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xunloadfonts(void)
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{
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int i, ip;
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/*
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* Free the loaded fonts in the font cache. This is done backwards
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* from the frccur.
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*/
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for (i = 0, ip = frccur; i < frclen; i++, ip--) {
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if (ip <= 0)
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ip = LEN(frc) - 1;
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XftFontClose(xw.dpy, frc[ip].font);
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}
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frccur = 0;
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frclen = 0;
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XftFontClose(xw.dpy, dc.font.match);
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FcPatternDestroy(dc.font.pattern);
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FcFontSetDestroy(dc.font.set);
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XftFontClose(xw.dpy, dc.bfont.match);
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FcPatternDestroy(dc.bfont.pattern);
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FcFontSetDestroy(dc.bfont.set);
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XftFontClose(xw.dpy, dc.ifont.match);
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FcPatternDestroy(dc.ifont.pattern);
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FcFontSetDestroy(dc.ifont.set);
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XftFontClose(xw.dpy, dc.ibfont.match);
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FcPatternDestroy(dc.ibfont.pattern);
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FcFontSetDestroy(dc.ibfont.set);
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}
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void
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xzoom(const Arg *arg)
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{
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xunloadfonts();
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xloadfonts(usedfont, usedfontsize + arg->i);
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cresize(0, 0);
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draw();
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@ -2379,6 +2449,9 @@ xinit(void) {
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xw.vis = XDefaultVisual(xw.dpy, xw.scr);
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/* font */
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if (!FcInit())
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die("Could not init fontconfig.\n");
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usedfont = (opt_font == NULL)? font : opt_font;
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xloadfonts(usedfont, 0);
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@ -2459,13 +2532,22 @@ xinit(void) {
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void
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xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
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int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
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width = charlen * xw.cw;
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width = charlen * xw.cw, u8clen, xp, i, frp, frcflags;
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long u8char;
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char *u8c;
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Font *font = &dc.font;
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XftFont *sfont;
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FcResult fcres;
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FcPattern *fcpattern, *fontpattern;
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FcFontSet *fcsets[] = { NULL };
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FcCharSet *fccharset;
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XGlyphInfo extents;
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Colour *fg = &dc.col[base.fg], *bg = &dc.col[base.bg],
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*temp, revfg, revbg;
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XRenderColor colfg, colbg;
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frcflags = FRC_NORMAL;
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if(base.mode & ATTR_BOLD) {
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if(BETWEEN(base.fg, 0, 7)) {
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/* basic system colors */
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@ -2484,12 +2566,17 @@ xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
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* 252 - 255 – brightest colors in greyscale
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*/
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font = &dc.bfont;
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frcflags = FRC_BOLD;
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}
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if(base.mode & ATTR_ITALIC)
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if(base.mode & ATTR_ITALIC) {
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font = &dc.ifont;
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if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD))
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frcflags = FRC_ITALIC;
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}
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if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
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font = &dc.ibfont;
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frcflags = FRC_ITALICBOLD;
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}
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if(IS_SET(MODE_REVERSE)) {
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if(fg == &dc.col[defaultfg]) {
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@ -2521,7 +2608,8 @@ xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
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bg = temp;
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}
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XftTextExtentsUtf8(xw.dpy, font->set, (FcChar8 *)s, bytelen,
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/* Width of the whole string that should be printed. */
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XftTextExtentsUtf8(xw.dpy, font->match, (FcChar8 *)s, bytelen,
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&extents);
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width = extents.xOff;
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@ -2539,9 +2627,96 @@ xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
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if(y == term.row-1)
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xclear(winx, winy + xw.ch, winx + width, xw.h);
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/* Clean up the region we want to draw to. */
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XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
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/*
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* Step through all UTF-8 characters one by one and search in the font
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* cache ring buffer, whether there was some font found to display the
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* unicode value of that UTF-8 character.
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*/
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fcsets[0] = font->set;
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for (xp = winx; bytelen > 0; ) {
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u8c = s;
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u8clen = utf8decode(s, &u8char);
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s += u8clen;
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bytelen -= u8clen;
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sfont = font->match;
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/*
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* Only check the font cache or load new fonts, if the
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* characters is not represented in main font.
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*/
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if (!XftCharExists(xw.dpy, font->match, u8char)) {
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frp = frccur;
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/* Search the font cache. */
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for (i = 0; i < frclen; i++, frp--) {
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if (frp <= 0)
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frp = LEN(frc) - 1;
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if (frc[frp].c == u8char
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&& frc[frp].flags == frcflags) {
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break;
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}
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}
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if (i >= frclen) {
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/*
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* Nothing was found in the cache. Now use
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* some dozen of Fontconfig calls to get the
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* font for one single character.
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*/
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fcpattern = FcPatternDuplicate(font->pattern);
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fccharset = FcCharSetCreate();
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FcCharSetAddChar(fccharset, u8char);
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FcPatternAddCharSet(fcpattern, FC_CHARSET,
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fccharset);
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FcPatternAddBool(fcpattern, FC_SCALABLE,
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FcTrue);
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FcConfigSubstitute(0, fcpattern,
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FcMatchPattern);
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FcDefaultSubstitute(fcpattern);
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fontpattern = FcFontSetMatch(0, fcsets,
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FcTrue, fcpattern, &fcres);
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frccur++;
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frclen++;
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if (frccur >= LEN(frc))
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frccur = 0;
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if (frclen >= LEN(frc)) {
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frclen = LEN(frc);
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XftFontClose(xw.dpy, frc[frccur].font);
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}
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/*
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* Overwrite or create the new cache entry
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* entry.
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*/
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frc[frccur].font = XftFontOpenPattern(xw.dpy,
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fontpattern);
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frc[frccur].c = u8char;
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frc[frccur].flags = frcflags;
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FcPatternDestroy(fcpattern);
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FcCharSetDestroy(fccharset);
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frp = frccur;
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}
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sfont = frc[frp].font;
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}
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XftDrawStringUtf8(xw.draw, fg, sfont, xp, winy + sfont->ascent,
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(FcChar8 *)u8c, u8clen);
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xp += font->width;
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}
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/*
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XftDrawStringUtf8(xw.draw, fg, font->set, winx,
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winy + font->ascent, (FcChar8 *)s, bytelen);
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*/
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if(base.mode & ATTR_UNDERLINE) {
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XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
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