1 /* -*- indent-tabs-mode: nil; tab-width: 4; c-basic-offset: 4; -*-
3 font.c for the Openbox window manager
4 Copyright (c) 2003 Ben Jansens
5 Copyright (c) 2003 Derek Foreman
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 See the COPYING file for a copy of the GNU General Public License.
27 #include <X11/Xft/Xft.h>
33 #define ELIPSES_LENGTH(font) \
34 (font->elipses_length + (font->shadow ? font->offset : 0))
36 #define OB_SHADOW "shadow"
37 #define OB_SHADOW_OFFSET "shadowoffset"
38 #define OB_SHADOW_ALPHA "shadowtint"
40 FcObjectType objs[] = {
41 { OB_SHADOW, FcTypeBool },
42 { OB_SHADOW_OFFSET, FcTypeInteger },
43 { OB_SHADOW_ALPHA, FcTypeInteger }
46 static PangoContext *context;
47 static gboolean started = FALSE;
49 static void font_startup(void)
52 g_warning(_("Couldn't initialize Xft."));
58 /* these will never be freed, but we will need them until we shut down anyway */
59 context = pango_xft_get_context(RrDisplay(NULL), RrScreen(NULL));
60 #endif /* USE_PANGO */
61 /* Here we are teaching xft about the shadow, shadowoffset & shadowtint */
62 FcNameRegisterObjectTypes(objs, (sizeof(objs) / sizeof(objs[0])));
65 static void measure_font(RrFont *f)
67 /* xOff, yOff is the normal spacing to the next glyph. */
70 /* measure an elipses */
71 XftTextExtentsUtf8(RrDisplay(f->inst), f->xftfont,
72 (FcChar8*)ELIPSES, strlen(ELIPSES), &info);
73 f->elipses_length = (signed) info.xOff;
76 static RrFont *openfont(const RrInstance *inst, gchar *fontstring)
78 /* This function is called for each font in the theme file. */
79 /* It returns a pointer to a RrFont struct after filling it. */
81 FcPattern *pat, *match;
86 guchar *tmp_string = NULL;
88 #endif /* USE_PANGO */
90 if (!(pat = XftNameParse(fontstring)))
93 match = XftFontMatch(RrDisplay(inst), RrScreen(inst), pat, &res);
94 FcPatternDestroy(pat);
98 out = g_new(RrFont, 1);
101 /* printf("\n\n%s\n\n",fontstring);
102 FcPatternPrint(match); */
104 out->pango_font_description = pango_font_description_new();
106 if (FcPatternGetString(match, "family", 0, &tmp_string) != FcResultTypeMismatch) {
107 pango_font_description_set_family(out->pango_font_description, (gchar *)tmp_string);
110 if (FcPatternGetString(match, "style", 0, &tmp_string) != FcResultTypeMismatch) {
112 if (!strcasecmp("bold", (gchar *)tmp_string)) {
113 pango_font_description_set_weight(out->pango_font_description, PANGO_WEIGHT_BOLD);
116 else if (!strcasecmp("italic", (gchar *)tmp_string)) {
117 pango_font_description_set_style(out->pango_font_description, PANGO_STYLE_ITALIC);
122 if (FcPatternGetInteger(match, "pixelsize", 0, &tmp_int) != FcResultTypeMismatch) {
123 /* TODO: is PANGO_SCALE correct ?? */
124 pango_font_description_set_size(out->pango_font_description, tmp_int*PANGO_SCALE);
127 /* based on gtkmain.c gtk_get_default_language() */
130 locale = g_strdup(setlocale(LC_CTYPE, NULL));
131 if ((p = strchr(locale, '.')))
133 if ((p = strchr(locale, '@')))
135 printf("%s\n", locale);
136 PangoFontMetrics *metrics = pango_context_get_metrics(context, out->pango_font_description, ln = pango_language_from_string(locale));
137 out->pango_ascent = pango_font_metrics_get_ascent(metrics);
138 out->pango_descent = pango_font_metrics_get_descent(metrics);
140 pango_font_metrics_unref(metrics);
141 #endif /* USE_PANGO */
143 if (FcPatternGetBool(match, OB_SHADOW, 0, &out->shadow) != FcResultMatch)
146 if (FcPatternGetInteger(match, OB_SHADOW_OFFSET, 0, &out->offset) !=
150 if (FcPatternGetInteger(match, OB_SHADOW_ALPHA, 0, &tint) != FcResultMatch)
152 if (tint > 100) tint = 100;
153 else if (tint < -100) tint = -100;
156 font = XftFontOpenPattern(RrDisplay(inst), match);
158 FcPatternDestroy(match);
165 /* FcPatternDestroy(match); */
166 #endif /* USE_PANGO */
172 RrFont *RrFontOpen(const RrInstance *inst, gchar *fontstring)
181 if ((out = openfont(inst, fontstring)))
183 g_warning(_("Unable to load font: %s\n"), fontstring);
184 g_warning(_("Trying fallback font: %s\n"), "sans");
186 if ((out = openfont(inst, "sans")))
188 g_warning(_("Unable to load font: %s\n"), "sans");
193 void RrFontClose(RrFont *f)
196 XftFontClose(RrDisplay(f->inst), f->xftfont);
200 pango_font_description_free(f->pango_font_description);
204 static void font_measure_full(const RrFont *f, const gchar *str,
210 pl = pango_layout_new (context);
211 pango_layout_set_text(pl, str, -1);
212 pango_layout_set_font_description(pl, f->pango_font_description);
213 pango_layout_set_single_paragraph_mode(pl, TRUE);
214 pango_layout_get_pixel_extents(pl, NULL, &rect);
215 *x = rect.width + (f->shadow ? ABS(f->offset) : 0);
216 *y = rect.height + (f->shadow ? ABS(f->offset) : 0);
222 XftTextExtentsUtf8(RrDisplay(f->inst), f->xftfont,
223 (const FcChar8*)str, strlen(str), &info);
225 *x = (signed) info.xOff + (f->shadow ? ABS(f->offset) : 0);
226 *y = info.height + (f->shadow ? ABS(f->offset) : 0);
227 #endif /* USE_PANGO */
230 RrSize *RrFontMeasureString(const RrFont *f, const gchar *str)
233 size = g_new(RrSize, 1);
234 font_measure_full (f, str, &size->width, &size->height);
238 gint RrFontHeight(const RrFont *f)
241 return (f->pango_ascent
244 (f->shadow ? f->offset : 0);
246 return f->xftfont->ascent + f->xftfont->descent +
247 (f->shadow ? f->offset : 0);
251 gint RrFontMaxCharWidth(const RrFont *f)
253 return (signed) f->xftfont->max_advance_width;
257 static inline int font_calculate_baseline(RrFont *f, gint height)
259 /* For my own reference:
261 * ^space/2 ^height ^baseline
264 * | | | | |_ _____ _| |_ _ _
265 * | | | | _/ -_) \ / _| || |
266 * | v_________v \__\___/_\_\\__|\_, |
272 int asc = f->pango_ascent;
273 int ascdesc = asc + f->pango_descent;
274 int space = height * PANGO_SCALE - ascdesc;
275 int baseline = space / 2 + asc;
276 return baseline / PANGO_SCALE;
280 void RrFontDraw(XftDraw *d, RrTextureText *t, RrRect *area)
288 gboolean shortened = FALSE;
293 pl = pango_layout_new (context);
294 #endif /* USE_PANGO */
297 * for xft we pass the top edge of the text for positioning... */
300 (area->height - RrFontHeight(t->font)) / 2;
302 /* but for pango we pass the baseline, since different fonts have
303 * different top edges. It looks stupid when the baseline of "normal"
304 * text jumps up and down when a "strange" character is just added
305 * to the end of the text */
307 font_calculate_baseline(t->font, area->height);
309 /* the +2 and -4 leave a small blank edge on the sides */
314 text = g_string_new(t->string);
316 l = g_utf8_strlen(text->str, -1);
317 font_measure_full(t->font, text->str, &mw, &mh);
318 while (l && mw > area->width) {
320 /* remove a character from the middle */
321 text = g_string_erase(text, l-- / 2, 1);
322 /* if the elipses are too large, don't show them at all */
323 if (ELIPSES_LENGTH(t->font) > area->width)
325 font_measure_full(t->font, text->str, &mw, &mh);
326 mw += ELIPSES_LENGTH(t->font);
329 text = g_string_insert(text, (l + 1) / 2, ELIPSES);
334 l = strlen(text->str); /* number of bytes */
337 pango_layout_set_text(pl, text->str, -1);
338 pango_layout_set_font_description(pl, t->font->pango_font_description);
339 pango_layout_set_single_paragraph_mode(pl, TRUE);
340 pango_layout_set_width(pl, w * PANGO_SCALE);
341 pango_layout_set_ellipsize(pl, PANGO_ELLIPSIZE_MIDDLE);
342 /* This doesn't work with layout_line() of course */
343 /* pango_layout_set_alignment(pl, (PangoAlignment)(t->justify)); */
344 pango_layout_get_pixel_extents(pl, NULL, &rect);
347 #endif /* USE_PANGO */
349 switch (t->justify) {
350 case RR_JUSTIFY_LEFT:
352 case RR_JUSTIFY_RIGHT:
355 case RR_JUSTIFY_CENTER:
360 if (t->font->shadow) {
361 if (t->font->tint >= 0) {
365 c.color.alpha = 0xffff * t->font->tint / 100;
366 c.pixel = BlackPixel(RrDisplay(t->font->inst),
367 RrScreen(t->font->inst));
369 c.color.red = 0xffff;
370 c.color.green = 0xffff;
371 c.color.blue = 0xffff;
372 c.color.alpha = 0xffff * -t->font->tint / 100;
373 c.pixel = WhitePixel(RrDisplay(t->font->inst),
374 RrScreen(t->font->inst));
377 XftDrawStringUtf8(d, &c, t->font->xftfont, x + t->font->offset,
378 t->font->xftfont->ascent + y + t->font->offset,
379 (FcChar8*)text->str, l);
380 #else /* USE_PANGO */
382 pango_xft_render_layout_line(d, &c, pango_layout_get_line(pl, 0),
383 (x + t->font->offset) * PANGO_SCALE,
384 (y + t->font->offset) * PANGO_SCALE);
385 #endif /* USE_PANGO */
387 c.color.red = t->color->r | t->color->r << 8;
388 c.color.green = t->color->g | t->color->g << 8;
389 c.color.blue = t->color->b | t->color->b << 8;
390 c.color.alpha = 0xff | 0xff << 8; /* fully opaque text */
391 c.pixel = t->color->pixel;
394 XftDrawStringUtf8(d, &c, t->font->xftfont, x,
395 t->font->xftfont->ascent + y,
396 (FcChar8*)text->str, l);
397 #else /* USE_PANGO */
398 /* This looks retarded, but layout_line() bases y on the baseline, while
399 * layout() bases y on the top of the ink layout shit ass fucking crap.
400 * We want the baseline to always be in the same place, thusly, we use
402 * The actual line doesn't need to be freed */
403 pango_xft_render_layout_line(d, &c, pango_layout_get_line(pl, 0),
404 x * PANGO_SCALE, y * PANGO_SCALE);
408 g_string_free(text, TRUE);