render/font.c (raw)
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#include "font.h" #include "color.h" #include "mask.h" #include "theme.h" #include "kernel/geom.h" #include "kernel/gettext.h" #define _(str) gettext(str) #include <X11/Xft/Xft.h> #include <glib.h> #include <string.h> #define ELIPSES "..." #define ELIPSES_LENGTH(font, shadow, offset) \ (font->elipses_length + (shadow ? offset : 0)) 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")); exit(EXIT_FAILURE); } #ifdef DEBUG version = XftGetVersion(); g_message("Using Xft %d.%d.%d (Built against %d.%d.%d).", version / 10000 % 100, version / 100 % 100, version % 100, XFT_MAJOR, XFT_MINOR, XFT_REVISION); #endif } static void measure_font(RrFont *f) { XGlyphInfo info; /* measure an elipses */ XftTextExtentsUtf8(RrDisplay(f->inst), f->xftfont, (FcChar8*)ELIPSES, strlen(ELIPSES), &info); f->elipses_length = (signed) info.xOff; } RrFont *RrFontOpen(const RrInstance *inst, char *fontstring) { RrFont *out; XftFont *xf; if (!started) { font_startup(); started = TRUE; } if ((xf = XftFontOpenName(RrDisplay(inst), RrScreen(inst), fontstring))) { out = g_new(RrFont, 1); out->inst = inst; out->xftfont = xf; measure_font(out); return out; } g_warning(_("Unable to load font: %s\n"), fontstring); g_warning(_("Trying fallback font: %s\n"), "sans"); if ((xf = XftFontOpenName(RrDisplay(inst), RrScreen(inst), "sans"))) { out = g_new(RrFont, 1); out->inst = inst; out->xftfont = xf; measure_font(out); return out; } g_warning(_("Unable to load font: %s\n"), "sans"); return NULL; } void RrFontClose(RrFont *f) { if (f) { XftFontClose(RrDisplay(f->inst), f->xftfont); g_free(f); } } static void font_measure_full(const RrFont *f, const gchar *str, gint shadow, gint offset, gint *x, gint *y) { XGlyphInfo info; XftTextExtentsUtf8(RrDisplay(f->inst), f->xftfont, (const FcChar8*)str, strlen(str), &info); *x = (signed) info.xOff + (shadow ? ABS(offset) : 0); *y = info.height + (shadow ? ABS(offset) : 0); } int RrFontMeasureString(const RrFont *f, const gchar *str, gint shadow, gint offset) { gint x, y; font_measure_full (f, str, shadow, offset, &x, &y); return x; } int RrFontHeight(const RrFont *f, gint shadow, gint offset) { return f->xftfont->ascent + f->xftfont->descent + (shadow ? offset : 0); } int RrFontMaxCharWidth(const RrFont *f) { return (signed) f->xftfont->max_advance_width; } void RrFontDraw(XftDraw *d, RrTextureText *t, Rect *area) { gint x,y,w,h; XftColor c; GString *text; gint mw, em, mh; size_t l; gboolean shortened = FALSE; /* center vertically */ y = area->y + (area->height - RrFontHeight(t->font, t->shadow, t->offset)) / 2; /* the +2 and -4 leave a small blank edge on the sides */ x = area->x + 2; w = area->width - 4; h = area->height; text = g_string_new(t->string); l = g_utf8_strlen(text->str, -1); font_measure_full(t->font, text->str, t->shadow, t->offset, &mw, &mh); while (l && mw > area->width) { shortened = TRUE; /* remove a character from the middle */ text = g_string_erase(text, l-- / 2, 1); em = ELIPSES_LENGTH(t->font, t->shadow, t->offset); /* if the elipses are too large, don't show them at all */ if (em > area->width) shortened = FALSE; font_measure_full(t->font, text->str, t->shadow, t->offset, &mw, &mh); mw += em; } if (shortened) { text = g_string_insert(text, (l + 1) / 2, ELIPSES); l += 3; } if (!l) return; 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; } l = strlen(text->str); /* number of bytes */ if (t->shadow) { if (t->tint >= 0) { c.color.red = 0; c.color.green = 0; c.color.blue = 0; c.color.alpha = 0xffff * t->tint / 100; /* transparent shadow */ c.pixel = BlackPixel(RrDisplay(t->font->inst), RrScreen(t->font->inst)); } else { c.color.red = 0xffff * -t->tint / 100; c.color.green = 0xffff * -t->tint / 100; c.color.blue = 0xffff * -t->tint / 100; c.color.alpha = 0xffff * -t->tint / 100; /* transparent shadow */ c.pixel = WhitePixel(RrDisplay(t->font->inst), RrScreen(t->font->inst)); } XftDrawStringUtf8(d, &c, t->font->xftfont, x + t->offset, t->font->xftfont->ascent + y + t->offset, (FcChar8*)text->str, l); } 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; XftDrawStringUtf8(d, &c, t->font->xftfont, x, t->font->xftfont->ascent + y, (FcChar8*)text->str, l); return; } |