sent-font

sent: font engine test
git clone git://git.codemadness.org/sent-font
Log | Files | Refs | LICENSE

commit b37ef383354248940465be915f3bbdb5ff66308c
parent c6c12c4f92285667ceede617b81053c29933d243
Author: Markus Teich <markus.teich@stusta.mhn.de>
Date:   Sun,  5 Apr 2015 15:48:47 +0200

prepare switch to libsl

Diffstat:
Makefile | 2+-
config.mk | 4++--
drw.c | 411+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
drw.h | 74++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
util.c | 17+++++++++++++++++
util.h | 7+++++++
6 files changed, 512 insertions(+), 3 deletions(-)

diff --git a/Makefile b/Makefile @@ -3,7 +3,7 @@ include config.mk -SRC = sent.c +SRC = sent.c drw.c util.c OBJ = ${SRC:.c=.o} all: options sent diff --git a/config.mk b/config.mk @@ -11,8 +11,8 @@ X11INC = /usr/X11R6/include X11LIB = /usr/X11R6/lib # includes and libs -INCS = -I. -I/usr/include -I${X11INC} -LIBS = -L/usr/lib -lc -lm -L${X11LIB} -lX11 -lpng +INCS = -I. -I/usr/include -I/usr/include/freetype2 -I${X11INC} +LIBS = -L/usr/lib -lc -lm -L${X11LIB} -lXft -lfontconfig -lX11 -lpng # flags CPPFLAGS = -DVERSION=\"${VERSION}\" -D_XOPEN_SOURCE=600 diff --git a/drw.c b/drw.c @@ -0,0 +1,411 @@ +/* See LICENSE file for copyright and license details. */ +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <X11/Xlib.h> +#include <X11/Xft/Xft.h> + +#include "drw.h" +#include "util.h" + +#define UTF_INVALID 0xFFFD +#define UTF_SIZ 4 + +static const unsigned char utfbyte[UTF_SIZ + 1] = {0x80, 0, 0xC0, 0xE0, 0xF0}; +static const unsigned char utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8}; +static const long utfmin[UTF_SIZ + 1] = { 0, 0, 0x80, 0x800, 0x10000}; +static const long utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF}; + +static long +utf8decodebyte(const char c, size_t *i) { + for(*i = 0; *i < (UTF_SIZ + 1); ++(*i)) + if(((unsigned char)c & utfmask[*i]) == utfbyte[*i]) + return (unsigned char)c & ~utfmask[*i]; + return 0; +} + +static size_t +utf8validate(long *u, size_t i) { + if(!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF)) + *u = UTF_INVALID; + for(i = 1; *u > utfmax[i]; ++i) + ; + return i; +} + +static size_t +utf8decode(const char *c, long *u, size_t clen) { + size_t i, j, len, type; + long udecoded; + + *u = UTF_INVALID; + if(!clen) + return 0; + udecoded = utf8decodebyte(c[0], &len); + if(!BETWEEN(len, 1, UTF_SIZ)) + return 1; + for(i = 1, j = 1; i < clen && j < len; ++i, ++j) { + udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type); + if(type != 0) + return j; + } + if(j < len) + return 0; + *u = udecoded; + utf8validate(u, len); + return len; +} + +Drw * +drw_create(Display *dpy, int screen, Window root, unsigned int w, unsigned int h) { + Drw *drw = (Drw *)calloc(1, sizeof(Drw)); + if(!drw) + return NULL; + drw->dpy = dpy; + drw->screen = screen; + drw->root = root; + drw->w = w; + drw->h = h; + drw->drawable = XCreatePixmap(dpy, root, w, h, DefaultDepth(dpy, screen)); + drw->gc = XCreateGC(dpy, root, 0, NULL); + drw->fontcount = 0; + 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; + if(drw->drawable != 0) + XFreePixmap(drw->dpy, drw->drawable); + drw->drawable = XCreatePixmap(drw->dpy, drw->root, w, h, DefaultDepth(drw->dpy, drw->screen)); +} + +void +drw_free(Drw *drw) { + size_t i; + for (i = 0; i < drw->fontcount; i++) { + drw_font_free(drw->fonts[i]); + } + XFreePixmap(drw->dpy, drw->drawable); + XFreeGC(drw->dpy, drw->gc); + free(drw); +} + +/* This function is an implementation detail. Library users should use + * drw_font_create instead. + */ +static Fnt * +drw_font_xcreate(Drw *drw, const char *fontname, FcPattern *fontpattern) { + Fnt *font; + + if (!(fontname || fontpattern)) + die("No font specified.\n"); + + if (!(font = (Fnt *)calloc(1, sizeof(Fnt)))) + return NULL; + + if (fontname) { + /* Using the pattern found at font->xfont->pattern does not yield same + * the same substitution results as using the pattern returned by + * FcNameParse; using the latter results in the desired fallback + * behaviour whereas the former just results in + * missing-character-rectangles being drawn, at least with some fonts. + */ + if (!(font->xfont = XftFontOpenName(drw->dpy, drw->screen, fontname)) || + !(font->pattern = FcNameParse((FcChar8 *) fontname))) { + if (font->xfont) { + XftFontClose(drw->dpy, font->xfont); + font->xfont = NULL; + } + fprintf(stderr, "error, cannot load font: '%s'\n", fontname); + } + } else if (fontpattern) { + if (!(font->xfont = XftFontOpenPattern(drw->dpy, fontpattern))) { + fprintf(stderr, "error, cannot load font pattern.\n"); + } else { + font->pattern = NULL; + } + } + + if (!font->xfont) { + free(font); + return NULL; + } + + font->ascent = font->xfont->ascent; + font->descent = font->xfont->descent; + font->h = font->ascent + font->descent; + font->dpy = drw->dpy; + return font; +} + +Fnt* +drw_font_create(Drw *drw, const char *fontname) { + return drw_font_xcreate(drw, fontname, NULL); +} + +void +drw_load_fonts(Drw* drw, const char *fonts[], size_t fontcount) { + size_t i; + Fnt *font; + for (i = 0; i < fontcount; i++) { + if (drw->fontcount >= DRW_FONT_CACHE_SIZE) { + die("Font cache exhausted.\n"); + } else if ((font = drw_font_xcreate(drw, fonts[i], NULL))) { + drw->fonts[drw->fontcount++] = font; + } + } +} + +void +drw_font_free(Fnt *font) { + if(!font) + return; + if(font->pattern) + FcPatternDestroy(font->pattern); + XftFontClose(font->dpy, font->xfont); + free(font); +} + +Clr * +drw_clr_create(Drw *drw, const char *clrname) { + Clr *clr; + Colormap cmap; + Visual *vis; + + if(!drw) + return NULL; + clr = (Clr *)calloc(1, sizeof(Clr)); + if(!clr) + return NULL; + cmap = DefaultColormap(drw->dpy, drw->screen); + vis = DefaultVisual(drw->dpy, drw->screen); + if(!XftColorAllocName(drw->dpy, vis, cmap, clrname, &clr->rgb)) + die("error, cannot allocate color '%s'\n", clrname); + clr->pix = clr->rgb.pixel; + return clr; +} + +void +drw_clr_free(Clr *clr) { + if(clr) + free(clr); +} + +void +drw_setscheme(Drw *drw, ClrScheme *scheme) { + if(drw && scheme) + drw->scheme = scheme; +} + +void +drw_rect(Drw *drw, int x, int y, unsigned int w, unsigned int h, int filled, int empty, int invert) { + int dx; + + if(!drw || !drw->fontcount || !drw->scheme) + return; + XSetForeground(drw->dpy, drw->gc, invert ? drw->scheme->bg->pix : drw->scheme->fg->pix); + dx = (drw->fonts[0]->ascent + drw->fonts[0]->descent + 2) / 4; + if(filled) + XFillRectangle(drw->dpy, drw->drawable, drw->gc, x+1, y+1, dx+1, dx+1); + else if(empty) + XDrawRectangle(drw->dpy, drw->drawable, drw->gc, x+1, y+1, dx, dx); +} + +int +drw_text(Drw *drw, int x, int y, unsigned int w, unsigned int h, const char *text, int invert) { + char buf[1024]; + int tx, ty, th; + Extnts tex; + Colormap cmap; + Visual *vis; + XftDraw *d; + Fnt *curfont, *nextfont; + size_t i, len; + int utf8strlen, utf8charlen, render; + long utf8codepoint = 0; + const char *utf8str; + FcCharSet *fccharset; + FcPattern *fcpattern; + FcPattern *match; + XftResult result; + int charexists = 0; + + if (!(render = x || y || w || h)) { + w = ~w; + } + + if (!drw || !drw->scheme) { + return 0; + } else if (render) { + XSetForeground(drw->dpy, drw->gc, invert ? drw->scheme->fg->pix : drw->scheme->bg->pix); + XFillRectangle(drw->dpy, drw->drawable, drw->gc, x, y, w, h); + } + + if (!text || !drw->fontcount) { + return 0; + } else if (render) { + cmap = DefaultColormap(drw->dpy, drw->screen); + vis = DefaultVisual(drw->dpy, drw->screen); + d = XftDrawCreate(drw->dpy, drw->drawable, vis, cmap); + } + + curfont = drw->fonts[0]; + while (1) { + utf8strlen = 0; + utf8str = text; + nextfont = NULL; + while (*text) { + utf8charlen = utf8decode(text, &utf8codepoint, UTF_SIZ); + for (i = 0; i < drw->fontcount; i++) { + charexists = charexists || XftCharExists(drw->dpy, drw->fonts[i]->xfont, utf8codepoint); + if (charexists) { + if (drw->fonts[i] == curfont) { + utf8strlen += utf8charlen; + text += utf8charlen; + } else { + nextfont = drw->fonts[i]; + } + break; + } + } + + if (!charexists || (nextfont && nextfont != curfont)) { + break; + } else { + charexists = 0; + } + } + + if (utf8strlen) { + drw_font_getexts(curfont, utf8str, utf8strlen, &tex); + /* shorten text if necessary */ + for(len = MIN(utf8strlen, (sizeof buf) - 1); len && (tex.w > w - drw->fonts[0]->h || w < drw->fonts[0]->h); len--) + drw_font_getexts(curfont, utf8str, len, &tex); + + if (len) { + memcpy(buf, utf8str, len); + buf[len] = '\0'; + if(len < utf8strlen) + for(i = len; i && i > len - 3; buf[--i] = '.'); + + if (render) { + th = curfont->ascent + curfont->descent; + ty = y + (h / 2) - (th / 2) + curfont->ascent; + tx = x + (h / 2); + XftDrawStringUtf8(d, invert ? &drw->scheme->bg->rgb : &drw->scheme->fg->rgb, curfont->xfont, tx, ty, (XftChar8 *)buf, len); + } + + x += tex.w; + w -= tex.w; + } + } + + if (!*text) { + break; + } else if (nextfont) { + charexists = 0; + curfont = nextfont; + } else { + /* Regardless of whether or not a fallback font is found, the + * character must be drawn. + */ + charexists = 1; + + if (drw->fontcount >= DRW_FONT_CACHE_SIZE) { + continue; + } + + fccharset = FcCharSetCreate(); + FcCharSetAddChar(fccharset, utf8codepoint); + + if (!drw->fonts[0]->pattern) { + /* Refer to the comment in drw_font_xcreate for more + * information. + */ + die("The first font in the cache must be loaded from a font string.\n"); + } + + fcpattern = FcPatternDuplicate(drw->fonts[0]->pattern); + FcPatternAddCharSet(fcpattern, FC_CHARSET, fccharset); + FcPatternAddBool(fcpattern, FC_SCALABLE, FcTrue); + + FcConfigSubstitute(NULL, fcpattern, FcMatchPattern); + FcDefaultSubstitute(fcpattern); + match = XftFontMatch(drw->dpy, drw->screen, fcpattern, &result); + + FcCharSetDestroy(fccharset); + FcPatternDestroy(fcpattern); + + if (match) { + curfont = drw_font_xcreate(drw, NULL, match); + if (curfont && XftCharExists(drw->dpy, curfont->xfont, utf8codepoint)) { + drw->fonts[drw->fontcount++] = curfont; + } else { + if (curfont) { + drw_font_free(curfont); + } + curfont = drw->fonts[0]; + } + } + } + } + + if (render) { + XftDrawDestroy(d); + } + + return x; +} + +void +drw_map(Drw *drw, Window win, int x, int y, unsigned int w, unsigned int h) { + if(!drw) + return; + XCopyArea(drw->dpy, drw->drawable, win, drw->gc, x, y, w, h, x, y); + XSync(drw->dpy, False); +} + + +void +drw_font_getexts(Fnt *font, const char *text, unsigned int len, Extnts *tex) { + XGlyphInfo ext; + + if(!font || !text) + return; + XftTextExtentsUtf8(font->dpy, font->xfont, (XftChar8 *)text, len, &ext); + tex->h = font->h; + tex->w = ext.xOff; +} + +unsigned int +drw_font_getexts_width(Fnt *font, const char *text, unsigned int len) { + Extnts tex; + + if(!font) + return -1; + drw_font_getexts(font, text, len, &tex); + return tex.w; +} + +Cur * +drw_cur_create(Drw *drw, int shape) { + Cur *cur = (Cur *)calloc(1, sizeof(Cur)); + + if(!drw || !cur) + return NULL; + cur->cursor = XCreateFontCursor(drw->dpy, shape); + return cur; +} + +void +drw_cur_free(Drw *drw, Cur *cursor) { + if(!drw || !cursor) + return; + XFreeCursor(drw->dpy, cursor->cursor); + free(cursor); +} diff --git a/drw.h b/drw.h @@ -0,0 +1,74 @@ +/* See LICENSE file for copyright and license details. */ +#define DRW_FONT_CACHE_SIZE 32 + +typedef struct { + unsigned long pix; + XftColor rgb; +} Clr; + +typedef struct { + Cursor cursor; +} Cur; + +typedef struct { + Display *dpy; + int ascent; + int descent; + unsigned int h; + XftFont *xfont; + FcPattern *pattern; +} Fnt; + +typedef struct { + Clr *fg; + Clr *bg; + Clr *border; +} ClrScheme; + +typedef struct { + unsigned int w, h; + Display *dpy; + int screen; + Window root; + Drawable drawable; + GC gc; + ClrScheme *scheme; + size_t fontcount; + Fnt *fonts[DRW_FONT_CACHE_SIZE]; +} Drw; + +typedef struct { + unsigned int w; + unsigned int h; +} 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_load_fonts(Drw* drw, const char *fonts[], size_t fontcount); +void drw_font_free(Fnt *font); +void drw_font_getexts(Fnt *font, const char *text, unsigned int len, Extnts *extnts); +unsigned int drw_font_getexts_width(Fnt *font, const char *text, unsigned int len); + +/* Colour abstraction */ +Clr *drw_clr_create(Drw *drw, const char *clrname); +void drw_clr_free(Clr *clr); + +/* Cursor abstraction */ +Cur *drw_cur_create(Drw *drw, int shape); +void drw_cur_free(Drw *drw, Cur *cursor); + +/* Drawing context manipulation */ +void drw_setfont(Drw *drw, Fnt *font); +void drw_setscheme(Drw *drw, ClrScheme *scheme); + +/* Drawing functions */ +void drw_rect(Drw *drw, int x, int y, unsigned int w, unsigned int h, int filled, int empty, int invert); +int drw_text(Drw *drw, int x, int y, unsigned int w, unsigned int h, const char *text, int invert); + +/* Map functions */ +void drw_map(Drw *drw, Window win, int x, int y, unsigned int w, unsigned int h); 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); +} + diff --git a/util.h b/util.h @@ -0,0 +1,7 @@ +/* See LICENSE file for copyright and license details. */ + +#define MAX(A, B) ((A) > (B) ? (A) : (B)) +#define MIN(A, B) ((A) < (B) ? (A) : (B)) +#define BETWEEN(X, A, B) ((A) <= (X) && (X) <= (B)) + +void die(const char *errstr, ...);