X-Git-Url: https://git.brokenzipper.com/gitweb?a=blobdiff_plain;f=render%2Ffont.c;h=a63c8ca502fd7accea6d4fc8227b0b4bafab53c4;hb=ac6fe9800850a4ce31efc610720099b60c2b7ff2;hp=4e39551371a23f441f2833e7cf42e2f932457e59;hpb=033bd73e7e80c13af0a7724f7f48eda0a7410e65;p=chaz%2Fopenbox diff --git a/render/font.c b/render/font.c index 4e395513..a63c8ca5 100644 --- a/render/font.c +++ b/render/font.c @@ -1,123 +1,313 @@ -#include -#include -#include "../kernel/openbox.h" +/* -*- indent-tabs-mode: nil; tab-width: 4; c-basic-offset: 4; -*- + + font.c for the Openbox window manager + Copyright (c) 2006 Mikael Magnusson + Copyright (c) 2003 Ben Jansens + Copyright (c) 2003 Derek Foreman + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + See the COPYING file for a copy of the GNU General Public License. +*/ + #include "font.h" +#include "color.h" +#include "mask.h" +#include "theme.h" +#include "geom.h" +#include "instance.h" +#include "gettext.h" -#include "../src/gettext.h" -#define _(str) gettext(str) +#include +#include +#include +#include + +#define OB_SHADOW "shadow" +#define OB_SHADOW_OFFSET "shadowoffset" +#define OB_SHADOW_ALPHA "shadowtint" + +FcObjectType objs[] = { + { OB_SHADOW, FcTypeBool }, + { OB_SHADOW_OFFSET, FcTypeInteger }, + { OB_SHADOW_ALPHA, FcTypeInteger } +}; -void font_startup(void) +static gboolean started = FALSE; + +static void font_startup(void) { -#ifdef DEBUG - int version; -#endif /* DEBUG */ if (!XftInit(0)) { - g_warning(_("Couldn't initialize Xft.\n\n")); - exit(3); + g_warning(_("Couldn't initialize Xft.")); + exit(EXIT_FAILURE); } -#ifdef DEBUG - version = XftGetVersion(); - g_message("Using Xft %d.%d.%d (Built against %d.%d.%d).\n", - version / 10000 % 100, version / 100 % 100, version % 100, - XFT_MAJOR, XFT_MINOR, XFT_REVISION); -#endif + + /* Here we are teaching xft about the shadow, shadowoffset & shadowtint */ + FcNameRegisterObjectTypes(objs, (sizeof(objs) / sizeof(objs[0]))); } -static void measure_height(ObFont *f) +static void measure_font(const RrInstance *inst, RrFont *f) { - XGlyphInfo info; - char *str; + PangoFontMetrics *metrics; + gchar *locale, *p; + + /* get the default language from the locale + (based on gtk_get_default_language in gtkmain.c) */ + locale = g_strdup(setlocale(LC_CTYPE, NULL)); + if ((p = strchr(locale, '.'))) *p = '\0'; /* strip off the . */ + if ((p = strchr(locale, '@'))) *p = '\0'; /* strip off the @ */ - /* XXX add some extended UTF8 characters in here? */ - str = "12345678900-qwertyuiopasdfghjklzxcvbnm" - "!@#$%^&*()_+QWERTYUIOPASDFGHJKLZXCVBNM" - "`~[]\\;',./{}|:\"<>?"; + /* measure the ascent and descent */ + metrics = pango_context_get_metrics(inst->pango, f->font_desc, + pango_language_from_string(locale)); + f->ascent = pango_font_metrics_get_ascent(metrics); + f->descent = pango_font_metrics_get_descent(metrics); + pango_font_metrics_unref(metrics); - XftTextExtentsUtf8(ob_display, f->xftfont, - (FcChar8*)str, strlen(str), &info); - f->height = (signed) info.height; + g_free(locale); } -ObFont *font_open(char *fontstring) +static RrFont *openfont(const RrInstance *inst, gchar *fontstring) { - ObFont *out; - XftFont *xf; + /* This function is called for each font in the theme file. */ + /* It returns a pointer to a RrFont struct after filling it. */ + RrFont *out; + FcPattern *pat; + gint tint; + gchar *sval; + gint ival; + + if (!(pat = XftNameParse(fontstring))) + return NULL; + + out = g_new(RrFont, 1); + out->inst = inst; + out->font_desc = pango_font_description_new(); + out->layout = pango_layout_new(inst->pango); + + /* get the data from the parsed xft string */ + + /* get the family */ + if (FcPatternGetString(pat, "family", 0, + (FcChar8**)&sval) == FcResultMatch) + pango_font_description_set_family(out->font_desc, sval); - if ((xf = XftFontOpenName(ob_display, ob_screen, fontstring))) { - out = malloc(sizeof(ObFont)); - out->xftfont = xf; - measure_height(out); - return out; + /* get the weight */ + if (FcPatternGetInteger(pat, "weight", 0, &ival) == FcResultMatch) { + if (ival == FC_WEIGHT_LIGHT) + pango_font_description_set_weight(out->font_desc, + PANGO_WEIGHT_LIGHT); + else if (ival == FC_WEIGHT_DEMIBOLD) + pango_font_description_set_weight(out->font_desc, + PANGO_WEIGHT_SEMIBOLD); + else if (ival == FC_WEIGHT_BOLD) + pango_font_description_set_weight(out->font_desc, + PANGO_WEIGHT_BOLD); + else if (ival == FC_WEIGHT_BLACK) + pango_font_description_set_weight(out->font_desc, + PANGO_WEIGHT_ULTRABOLD); + } + + /* get the style/slant */ + if (FcPatternGetInteger(pat, "slant", 0, &ival) == FcResultMatch) { + if (ival == FC_SLANT_ITALIC) + pango_font_description_set_style(out->font_desc, + PANGO_STYLE_ITALIC); + else if (ival == FC_SLANT_OBLIQUE) + pango_font_description_set_style(out->font_desc, + PANGO_STYLE_OBLIQUE); + } + + /* get the size */ + if (FcPatternGetInteger(pat, "size", 0, &ival) == FcResultMatch) + pango_font_description_set_size(out->font_desc, ival * PANGO_SCALE); + else if (FcPatternGetInteger(pat, "pixelsize", 0, &ival) == FcResultMatch) + pango_font_description_set_absolute_size(out->font_desc, + ival * PANGO_SCALE); + else + pango_font_description_set_size(out->font_desc, 8 * PANGO_SCALE); + + if (FcPatternGetBool(pat, OB_SHADOW, 0, &out->shadow) != FcResultMatch) + out->shadow = FALSE; + + if (FcPatternGetInteger(pat, OB_SHADOW_OFFSET, 0, &out->offset) != + FcResultMatch) + out->offset = 1; + + if (FcPatternGetInteger(pat, OB_SHADOW_ALPHA, 0, &tint) != FcResultMatch) + tint = 25; + if (tint > 100) tint = 100; + else if (tint < -100) tint = -100; + out->tint = tint; + + /* setup the layout */ + pango_layout_set_font_description(out->layout, out->font_desc); + pango_layout_set_single_paragraph_mode(out->layout, TRUE); + pango_layout_set_ellipsize(out->layout, PANGO_ELLIPSIZE_MIDDLE); + + /* get the ascent and descent */ + measure_font(inst, out); + + return out; +} + +RrFont *RrFontOpen(const RrInstance *inst, gchar *fontstring) +{ + RrFont *out; + + if (!started) { + font_startup(); + started = TRUE; } + + if ((out = openfont(inst, fontstring))) + return out; g_warning(_("Unable to load font: %s\n"), fontstring); - g_warning(_("Trying fallback font: %s\n"), "fixed"); + g_warning(_("Trying fallback font: %s\n"), "sans"); - if ((xf = XftFontOpenName(ob_display, ob_screen, "fixed"))) { - out = malloc(sizeof(ObFont)); - out->xftfont = xf; - measure_height(out); + if ((out = openfont(inst, "sans"))) return out; - } - g_warning(_("Unable to load font: %s\n"), "fixed"); - g_warning(_("Aborting!.\n")); + g_warning(_("Unable to load font: %s\n"), "sans"); - exit(3); // can't continue without a font + return NULL; } -void font_close(ObFont *f) +void RrFontClose(RrFont *f) { - XftFontClose(ob_display, f->xftfont); + if (f) { + g_object_unref(f->layout); + pango_font_description_free(f->font_desc); + g_free(f); + } } -int font_measure_string(ObFont *f, const char *str, int shadow, int offset) +static void font_measure_full(const RrFont *f, const gchar *str, + gint *x, gint *y) { - XGlyphInfo info; + PangoRectangle rect; - XftTextExtentsUtf8(ob_display, f->xftfont, - (FcChar8*)str, strlen(str), &info); + pango_layout_set_text(f->layout, str, -1); + pango_layout_set_width(f->layout, -1); + pango_layout_get_pixel_extents(f->layout, NULL, &rect); + *x = rect.width + (f->shadow ? ABS(f->offset) : 0); + *y = rect.height + (f->shadow ? ABS(f->offset) : 0); +} - return (signed) info.xOff + (shadow ? offset : 0); +RrSize *RrFontMeasureString(const RrFont *f, const gchar *str) +{ + RrSize *size; + size = g_new(RrSize, 1); + font_measure_full(f, str, &size->width, &size->height); + return size; } -int font_height(ObFont *f, int shadow, int offset) +gint RrFontHeight(const RrFont *f) { - return f->height + (shadow ? offset : 0); + return (f->ascent + f->descent) / PANGO_SCALE + + (f->shadow ? f->offset : 0); } -int font_max_char_width(ObFont *f) +static inline int font_calculate_baseline(RrFont *f, gint height) { - return (signed) f->xftfont->max_advance_width; +/* For my own reference: + * _________ + * ^space/2 ^height ^baseline + * v_________|_ | + * | ^ascent | _ _ + * | | | | |_ _____ _| |_ _ _ + * | | | | _/ -_) \ / _| || | + * | v_________v \__\___/_\_\\__|\_, | + * | ^descent |__/ + * __________|_v + * ^space/2 | + * V_________v + */ + return (((height * PANGO_SCALE) /* height of the space in pango units */ + - (f->ascent + f->descent)) /* minus space taken up by text */ + / 2 /* divided by two -> half of the empty space (this is the top + of the text) */ + + f->ascent) /* now move down to the baseline */ + / PANGO_SCALE; /* back to pixels */ } -void font_draw(XftDraw *d, TextureText *t, int x, int y, int w, int h) +void RrFontDraw(XftDraw *d, RrTextureText *t, RrRect *area) { + gint x,y,w,h; XftColor c; + gint mw; + PangoRectangle rect; + + /* center the text vertically + We do this centering based on the 'baseline' since different fonts have + different top edges. It looks bad when the whole string is moved when 1 + character from a non-default language is included in the string */ + y = area->y + + font_calculate_baseline(t->font, area->height); + + /* the +2 and -4 leave a small blank edge on the sides */ + x = area->x + 2; + w = area->width - 4; + h = area->height; + + pango_layout_set_text(t->font->layout, t->string, -1); + pango_layout_set_width(t->font->layout, w * PANGO_SCALE); + + pango_layout_get_pixel_extents(t->font->layout, NULL, &rect); + mw = rect.width; + + /* pango_layout_set_alignment doesn't work with + pango_xft_render_layout_line */ + switch (t->justify) { + case RR_JUSTIFY_LEFT: + break; + case RR_JUSTIFY_RIGHT: + x += (w - mw); + break; + case RR_JUSTIFY_CENTER: + x += (w - mw) / 2; + break; + } + + if (t->font->shadow) { + if (t->font->tint >= 0) { + c.color.red = 0; + c.color.green = 0; + c.color.blue = 0; + c.color.alpha = 0xffff * t->font->tint / 100; + c.pixel = BlackPixel(RrDisplay(t->font->inst), + RrScreen(t->font->inst)); + } else { + c.color.red = 0xffff; + c.color.green = 0xffff; + c.color.blue = 0xffff; + c.color.alpha = 0xffff * -t->font->tint / 100; + c.pixel = WhitePixel(RrDisplay(t->font->inst), + RrScreen(t->font->inst)); + } + /* see below... */ + pango_xft_render_layout_line + (d, &c, pango_layout_get_line(t->font->layout, 0), + (x + t->font->offset) * PANGO_SCALE, + (y + t->font->offset) * PANGO_SCALE); + } - /* accomidate for areas bigger/smaller than Xft thinks the font is tall */ - y += (h - t->font->xftfont->height) / 2; - - x += 3; /* XXX figure out X with justification */ - - if (t->shadow) { - c.color.red = 0; - c.color.green = 0; - c.color.blue = 0; - c.color.alpha = t->tint | t->tint << 8; // transparent shadow - c.pixel = BlackPixel(ob_display, ob_screen); - - XftDrawStringUtf8(d, &c, t->font->xftfont, x + t->offset, - t->font->xftfont->ascent + y + t->offset, - (FcChar8*)t->string, strlen(t->string)); - } c.color.red = t->color->r | t->color->r << 8; c.color.green = t->color->g | t->color->g << 8; c.color.blue = t->color->b | t->color->b << 8; + c.color.alpha = 0xff | 0xff << 8; /* fully opaque text */ c.pixel = t->color->pixel; - c.color.alpha = 0xff | 0xff << 8; // no transparency in Color yet - - XftDrawStringUtf8(d, &c, t->font->xftfont, x, - t->font->xftfont->ascent + y - - (t->font->xftfont->height - t->font->height) / 2, - (FcChar8*)t->string, strlen(t->string)); - return; + + /* layout_line() uses y to specify the baseline + The line doesn't need to be freed, it's a part of the layout */ + pango_xft_render_layout_line + (d, &c, pango_layout_get_line(t->font->layout, 0), + x * PANGO_SCALE, y * PANGO_SCALE); }