109 lines
2.5 KiB
C
109 lines
2.5 KiB
C
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#include <stdlib.h>
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#include <stdio.h>
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#include <math.h>
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#include <time.h>
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#include <X11/Xft/Xft.h>
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#include <X11/cursorfont.h>
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#include <hb.h>
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#include <hb-ft.h>
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#include "st.h"
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#include "hb.h"
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#define FEATURE(c1,c2,c3,c4) { .tag = HB_TAG(c1,c2,c3,c4), .value = 1, .start = HB_FEATURE_GLOBAL_START, .end = HB_FEATURE_GLOBAL_END }
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hb_font_t *hbfindfont(XftFont *match);
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typedef struct {
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XftFont *match;
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hb_font_t *font;
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} HbFontMatch;
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static int hbfontslen = 0;
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static HbFontMatch *hbfontcache = NULL;
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/*
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* Poplulate the array with a list of font features, wrapped in FEATURE macro,
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* e. g.
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* FEATURE('c', 'a', 'l', 't'), FEATURE('d', 'l', 'i', 'g')
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*/
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hb_feature_t features[] = { 0 };
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void
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hbunloadfonts()
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{
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for (int i = 0; i < hbfontslen; i++) {
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hb_font_destroy(hbfontcache[i].font);
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XftUnlockFace(hbfontcache[i].match);
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}
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if (hbfontcache != NULL) {
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free(hbfontcache);
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hbfontcache = NULL;
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}
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hbfontslen = 0;
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}
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hb_font_t *
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hbfindfont(XftFont *match)
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{
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for (int i = 0; i < hbfontslen; i++) {
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if (hbfontcache[i].match == match)
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return hbfontcache[i].font;
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}
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/* Font not found in cache, caching it now. */
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hbfontcache = realloc(hbfontcache, sizeof(HbFontMatch) * (hbfontslen + 1));
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FT_Face face = XftLockFace(match);
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hb_font_t *font = hb_ft_font_create(face, NULL);
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if (font == NULL)
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die("Failed to load Harfbuzz font.");
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hbfontcache[hbfontslen].match = match;
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hbfontcache[hbfontslen].font = font;
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hbfontslen += 1;
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return font;
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}
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void hbtransform(HbTransformData *data, XftFont *xfont, const Glyph *glyphs, int start, int length) {
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Rune rune;
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ushort mode = USHRT_MAX;
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unsigned int glyph_count;
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int i, end = start + length;
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hb_font_t *font = hbfindfont(xfont);
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if (font == NULL)
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return;
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hb_buffer_t *buffer = hb_buffer_create();
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hb_buffer_set_direction(buffer, HB_DIRECTION_LTR);
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/* Fill buffer with codepoints. */
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for (i = start; i < end; i++) {
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rune = glyphs[i].u;
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mode = glyphs[i].mode;
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if (mode & ATTR_WDUMMY)
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rune = 0x0020;
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hb_buffer_add_codepoints(buffer, &rune, 1, 0, 1);
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}
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/* Shape the segment. */
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hb_shape(font, buffer, features, sizeof(features)/sizeof(hb_feature_t));
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/* Get new glyph info. */
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hb_glyph_info_t *info = hb_buffer_get_glyph_infos(buffer, &glyph_count);
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hb_glyph_position_t *pos = hb_buffer_get_glyph_positions(buffer, &glyph_count);
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/** Fill the output. */
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data->buffer = buffer;
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data->glyphs = info;
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data->positions = pos;
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data->count = glyph_count;
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}
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void hbcleanup(HbTransformData *data) {
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hb_buffer_destroy(data->buffer);
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memset(data, 0, sizeof(HbTransformData));
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}
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