foot/font.h
Daniel Eklöf e218e19ea3
font: load all fallbacks when instantiating a primary font
The caching of fallback fonts didn't work. It "worked" because we
didn't free the fonts... When we started doing that, the fallback
fonts were no longer cached.

Another solution would have been to keep the cached fallback fonts
around until exit, and free them there. But that didn't seem very
clean.

So, for now, load *all* fallbacks when instantiating a
primary (non-fallback) font.

Note that this slows down initial startup time.
2019-10-17 17:43:40 +02:00

70 lines
1.4 KiB
C

#pragma once
#include <stdbool.h>
#include <threads.h>
#include <ft2build.h>
#include FT_FREETYPE_H
#include FT_LCD_FILTER_H
#include <fontconfig/fontconfig.h>
#include <pixman.h>
#include "tllist.h"
//#include "terminal.h"
typedef tll(const char *) font_list_t;
struct glyph {
wchar_t wc;
int cols;
pixman_image_t *pix;
int x;
int y;
int width;
int height;
bool valid;
};
typedef tll(struct glyph) hash_entry_t;
struct font {
char *name;
mtx_t lock;
FT_Face face;
int load_flags;
int render_flags;
FT_LcdFilter lcd_filter;
double pixel_size_fixup; /* Scale factor - should only be used with ARGB32 glyphs */
bool bgr; /* True for FC_RGBA_BGR and FC_RGBA_VBGR */
struct {
int position;
int thickness;
} underline;
struct {
int position;
int thickness;
} strikeout;
bool is_fallback;
tll(struct font *) fallbacks;
size_t ref_counter;
/* Fields below are only valid for non-fallback fonts */
FcPattern *fc_pattern;
FcFontSet *fc_fonts;
int fc_idx;
struct font **fc_loaded_fallbacks; /* fc_fonts->nfont array */
hash_entry_t **glyph_cache;
};
struct font *font_from_name(font_list_t names, const char *attributes);
const struct glyph *font_glyph_for_wc(struct font *font, wchar_t wc);
void font_destroy(struct font *font);