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.
26 #include <X11/Xft/Xft.h>
32 #define ELIPSES_LENGTH(font) \
33 (font->elipses_length + (font->shadow ? font->offset : 0))
35 #define OB_SHADOW "shadow"
36 #define OB_SHADOW_OFFSET "shadowoffset"
37 #define OB_SHADOW_ALPHA "shadowtint"
39 FcObjectType objs[] = {
40 { OB_SHADOW, FcTypeBool },
41 { OB_SHADOW_OFFSET, FcTypeInteger },
42 { OB_SHADOW_ALPHA, FcTypeInteger }
45 static gboolean started = FALSE;
47 static void font_startup(void)
50 g_warning(_("Couldn't initialize Xft."));
56 #endif /* USE_PANGO */
57 /* Here we are teaching xft about the shadow, shadowoffset & shadowtint */
58 FcNameRegisterObjectTypes(objs, (sizeof(objs) / sizeof(objs[0])));
61 static void measure_font(RrFont *f)
63 /* xOff, yOff is the normal spacing to the next glyph. */
66 /* measure an elipses */
67 XftTextExtentsUtf8(RrDisplay(f->inst), f->xftfont,
68 (FcChar8*)ELIPSES, strlen(ELIPSES), &info);
69 f->elipses_length = (signed) info.xOff;
72 static RrFont *openfont(const RrInstance *inst, gchar *fontstring)
74 /* This function is called for each font in the theme file. */
75 /* It returns a pointer to a RrFont struct after filling it. */
77 FcPattern *pat, *match;
82 gchar *tmp_string = NULL;
84 #endif /* USE_PANGO */
86 if (!(pat = XftNameParse(fontstring)))
89 match = XftFontMatch(RrDisplay(inst), RrScreen(inst), pat, &res);
90 FcPatternDestroy(pat);
94 out = g_new(RrFont, 1);
97 /* printf("\n\n%s\n\n",fontstring);
98 FcPatternPrint(match); */
100 out->pango_font_description = pango_font_description_new();
102 if (FcPatternGetString(match, "family", 0, &tmp_string) != FcResultTypeMismatch) {
103 pango_font_description_set_family(out->pango_font_description, tmp_string);
106 if (FcPatternGetString(match, "style", 0, &tmp_string) != FcResultTypeMismatch) {
108 if (!strcasecmp("bold", tmp_string)) {
109 pango_font_description_set_weight(out->pango_font_description, PANGO_WEIGHT_BOLD);
112 else if (!strcasecmp("italic", tmp_string)) {
113 pango_font_description_set_style(out->pango_font_description, PANGO_STYLE_ITALIC);
118 if (FcPatternGetInteger(match, "pixelsize", 0, &tmp_int) != FcResultTypeMismatch) {
119 /* TODO: is PANGO_SCALE correct ?? */
120 pango_font_description_set_size(out->pango_font_description, tmp_int*PANGO_SCALE);
122 #endif /* USE_PANGO */
124 if (FcPatternGetBool(match, OB_SHADOW, 0, &out->shadow) != FcResultMatch)
127 if (FcPatternGetInteger(match, OB_SHADOW_OFFSET, 0, &out->offset) !=
131 if (FcPatternGetInteger(match, OB_SHADOW_ALPHA, 0, &tint) != FcResultMatch)
133 if (tint > 100) tint = 100;
134 else if (tint < -100) tint = -100;
137 font = XftFontOpenPattern(RrDisplay(inst), match);
139 FcPatternDestroy(match);
146 /* FcPatternDestroy(match); */
147 #endif /* USE_PANGO */
153 RrFont *RrFontOpen(const RrInstance *inst, gchar *fontstring)
162 if ((out = openfont(inst, fontstring)))
164 g_warning(_("Unable to load font: %s\n"), fontstring);
165 g_warning(_("Trying fallback font: %s\n"), "sans");
167 if ((out = openfont(inst, "sans")))
169 g_warning(_("Unable to load font: %s\n"), "sans");
174 void RrFontClose(RrFont *f)
177 XftFontClose(RrDisplay(f->inst), f->xftfont);
182 static void font_measure_full(const RrFont *f, const gchar *str,
186 PangoContext *context;
189 context = pango_xft_get_context (RrDisplay(f->inst), RrScreen(f->inst));
190 pl = pango_layout_new (context);
191 pango_layout_set_text(pl, str, -1);
192 pango_layout_set_font_description(pl, f->pango_font_description);
193 pango_layout_set_single_paragraph_mode(pl, TRUE);
194 pango_layout_get_pixel_extents(pl, NULL, &rect);
195 *x = rect.width + (f->shadow ? ABS(f->offset) : 0);
196 *y = rect.height + (f->shadow ? ABS(f->offset) : 0);
198 g_object_unref(context);
203 XftTextExtentsUtf8(RrDisplay(f->inst), f->xftfont,
204 (const FcChar8*)str, strlen(str), &info);
206 *x = (signed) info.xOff + (f->shadow ? ABS(f->offset) : 0);
207 *y = info.height + (f->shadow ? ABS(f->offset) : 0);
208 #endif /* USE_PANGO */
211 gint RrFontMeasureString(const RrFont *f, const gchar *str)
214 font_measure_full (f, str, &x, &y);
218 gint RrFontHeight(const RrFont *f)
221 return f->xftfont->ascent + f->xftfont->descent +
222 (f->shadow ? f->offset : 0);
223 #else /* USE_PANGO */
225 PangoContext *context = pango_context_new ();
227 PangoFontMetrics *metrics = pango_context_get_metrics(context, f->pango_font, NULL);
229 gint result = pango_font_metrics_get_ascent (metrics) +
230 pango_font_metrics_get_descent(metrics) +
231 (f->shadow ? f->offset : 0);
233 pango_font_metrics_unref(metrics);
234 g_object_unref(context);
237 return f->xftfont->ascent + f->xftfont->descent +
238 (f->shadow ? f->offset : 0);
240 #endif /* USE_PANGO */
243 gint RrFontMaxCharWidth(const RrFont *f)
245 return (signed) f->xftfont->max_advance_width;
248 void RrFontDraw(XftDraw *d, RrTextureText *t, RrRect *area)
255 gboolean shortened = FALSE;
259 PangoLayoutLine *pll;
260 PangoContext *context;
263 context = pango_xft_get_context (RrDisplay(t->font->inst), RrScreen(t->font->inst));
264 pl = pango_layout_new (context);
265 #endif /* USE_PANGO */
267 /* center vertically */
269 (area->height - RrFontHeight(t->font)) / 2;
270 /* the +2 and -4 leave a small blank edge on the sides */
275 text = g_string_new(t->string);
276 l = g_utf8_strlen(text->str, -1);
277 font_measure_full(t->font, text->str, &mw, &mh);
278 while (l && mw > area->width) {
280 /* remove a character from the middle */
281 text = g_string_erase(text, l-- / 2, 1);
282 /* if the elipses are too large, don't show them at all */
283 if (ELIPSES_LENGTH(t->font) > area->width)
285 font_measure_full(t->font, text->str, &mw, &mh);
286 mw += ELIPSES_LENGTH(t->font);
289 text = g_string_insert(text, (l + 1) / 2, ELIPSES);
294 switch (t->justify) {
295 case RR_JUSTIFY_LEFT:
297 case RR_JUSTIFY_RIGHT:
300 case RR_JUSTIFY_CENTER:
305 l = strlen(text->str); /* number of bytes */
308 pango_layout_set_text(pl, text->str, l);
309 pango_layout_set_font_description(pl, t->font->pango_font_description);
310 pango_layout_set_single_paragraph_mode(pl, TRUE);
311 pll = pango_layout_get_line(pl, 0);
312 #endif /* USE_PANGO */
314 if (t->font->shadow) {
317 #endif /* USE_PANGO */
318 if (t->font->tint >= 0) {
322 c.color.alpha = 0xffff * t->font->tint / 100;
323 c.pixel = BlackPixel(RrDisplay(t->font->inst),
324 RrScreen(t->font->inst));
326 c.color.red = 0xffff;
327 c.color.green = 0xffff;
328 c.color.blue = 0xffff;
329 c.color.alpha = 0xffff * -t->font->tint / 100;
330 c.pixel = WhitePixel(RrDisplay(t->font->inst),
331 RrScreen(t->font->inst));
334 XftDrawStringUtf8(d, &c, t->font->xftfont, x + t->font->offset,
335 t->font->xftfont->ascent + y + t->font->offset,
336 (FcChar8*)text->str, l);
338 #else /* USE_PANGO */
341 for (p = pll->runs; p != NULL; p = p->next)
343 PangoLayoutRun *run = p->data;
344 PangoFont *font = run->item->analysis.font;
345 PangoGlyphString *glyphs = run->glyphs;
348 pango_glyph_string_extents (glyphs, font, NULL, &rect);
349 pango_xft_render (d, &c, font, glyphs, x2 + t->font->offset,
350 t->font->xftfont->ascent + y + t->font->offset);
351 x2 += rect.width / PANGO_SCALE;
354 #endif /* USE_PANGO */
355 c.color.red = t->color->r | t->color->r << 8;
356 c.color.green = t->color->g | t->color->g << 8;
357 c.color.blue = t->color->b | t->color->b << 8;
358 c.color.alpha = 0xff | 0xff << 8; /* fully opaque text */
359 c.pixel = t->color->pixel;
362 XftDrawStringUtf8(d, &c, t->font->xftfont, x,
363 t->font->xftfont->ascent + y,
364 (FcChar8*)text->str, l);
365 #else /* USE_PANGO */
366 for (p = pll->runs; p != NULL; p = p->next)
368 PangoLayoutRun *run = p->data;
369 PangoFont *font = run->item->analysis.font;
370 PangoGlyphString *glyphs = run->glyphs;
373 pango_glyph_string_extents (glyphs, font, NULL, &rect);
374 pango_xft_render (d, &c, font, glyphs, x, t->font->xftfont->ascent + y);
375 x += rect.width / PANGO_SCALE;
378 // pango_layout_line_unref(pll);
380 g_object_unref(context);
381 #endif /* USE_PANGO */
383 g_string_free(text, TRUE);