Revert "patch: ligatures-scrollback-ringbuffer"

This reverts commit ab0590b48a.

hb.c

@@ -1,136 +0,0 @@
-// clang-format off
-#include <X11/Xft/Xft.h>
-#include <X11/cursorfont.h>
-#include <hb-ft.h>
-#include <hb.h>
-#include <math.h>
-#include <stdio.h>
-#include <stdlib.h>
-
-#include "st.h"
-#include "hb.h"
-// clang-format on
-
-#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}
-#define BUFFER_STEP 256
-
-hb_font_t *hbfindfont(XftFont *match);
-
-typedef struct {
-  XftFont *match;
-  hb_font_t *font;
-} HbFontMatch;
-
-typedef struct {
-  size_t capacity;
-  HbFontMatch *fonts;
-} HbFontCache;
-
-static HbFontCache hbfontcache = {0, NULL};
-
-typedef struct {
-  size_t capacity;
-  Rune *runes;
-} RuneBuffer;
-
-static RuneBuffer hbrunebuffer = {0, NULL};
-
-/*
- * Poplulate the array with a list of font features, wrapped in FEATURE macro,
- * e. g.
- * FEATURE('c', 'a', 'l', 't'), FEATURE('d', 'l', 'i', 'g')
- */
-hb_feature_t features[] = {FEATURE('c', 'a', 'l', 't'),
-                           FEATURE('d', 'l', 'i', 'g')
-
-};
-
-void hbunloadfonts() {
-  for (int i = 0; i < hbfontcache.capacity; i++) {
-    hb_font_destroy(hbfontcache.fonts[i].font);
-    XftUnlockFace(hbfontcache.fonts[i].match);
-  }
-
-  if (hbfontcache.fonts != NULL) {
-    free(hbfontcache.fonts);
-    hbfontcache.fonts = NULL;
-  }
-  hbfontcache.capacity = 0;
-}
-
-hb_font_t *hbfindfont(XftFont *match) {
-  for (int i = 0; i < hbfontcache.capacity; i++) {
-    if (hbfontcache.fonts[i].match == match)
-      return hbfontcache.fonts[i].font;
-  }
-
-  /* Font not found in cache, caching it now. */
-  hbfontcache.fonts = realloc(hbfontcache.fonts,
-                              sizeof(HbFontMatch) * (hbfontcache.capacity + 1));
-  FT_Face face = XftLockFace(match);
-  hb_font_t *font = hb_ft_font_create(face, NULL);
-  if (font == NULL)
-    die("Failed to load Harfbuzz font.");
-
-  hbfontcache.fonts[hbfontcache.capacity].match = match;
-  hbfontcache.fonts[hbfontcache.capacity].font = font;
-  hbfontcache.capacity += 1;
-
-  return font;
-}
-
-void hbtransform(HbTransformData *data, XftFont *xfont, const Glyph *glyphs,
-                 int start, int length) {
-  ushort mode = USHRT_MAX;
-  unsigned int glyph_count;
-  int rune_idx, glyph_idx, end = start + length;
-
-  hb_font_t *font = hbfindfont(xfont);
-  if (font == NULL)
-    return;
-
-  hb_buffer_t *buffer = hb_buffer_create();
-  hb_buffer_set_direction(buffer, HB_DIRECTION_LTR);
-  hb_buffer_set_cluster_level(buffer,
-                              HB_BUFFER_CLUSTER_LEVEL_MONOTONE_CHARACTERS);
-
-  /* Resize the buffer if required length is larger. */
-  if (hbrunebuffer.capacity < length) {
-    hbrunebuffer.capacity = (length / BUFFER_STEP + 1) * BUFFER_STEP;
-    hbrunebuffer.runes =
-        realloc(hbrunebuffer.runes, hbrunebuffer.capacity * sizeof(Rune));
-  }
-
-  /* Fill buffer with codepoints. */
-  for (rune_idx = 0, glyph_idx = start; glyph_idx < end;
-       glyph_idx++, rune_idx++) {
-    hbrunebuffer.runes[rune_idx] = glyphs[glyph_idx].u;
-    mode = glyphs[glyph_idx].mode;
-    if (mode & ATTR_WDUMMY)
-      hbrunebuffer.runes[rune_idx] = 0x0020;
-  }
-  hb_buffer_add_codepoints(buffer, hbrunebuffer.runes, length, 0, length);
-
-  /* Shape the segment. */
-  hb_shape(font, buffer, features, sizeof(features) / sizeof(hb_feature_t));
-
-  /* Get new glyph info. */
-  hb_glyph_info_t *info = hb_buffer_get_glyph_infos(buffer, &glyph_count);
-  hb_glyph_position_t *pos =
-      hb_buffer_get_glyph_positions(buffer, &glyph_count);
-
-  /* Fill the output. */
-  data->buffer = buffer;
-  data->glyphs = info;
-  data->positions = pos;
-  data->count = glyph_count;
-}
-
-void hbcleanup(HbTransformData *data) {
-  hb_buffer_destroy(data->buffer);
-  memset(data, 0, sizeof(HbTransformData));
-}