Delete third_party/harfbuzz

third_party/harfbuzz/contrib/harfbuzz-freetype.c

-#include <stdint.h>
-
-#include <ft2build.h>
-#include FT_FREETYPE_H
-#include FT_TRUETYPE_TABLES_H
-
-#if 0
-#include <freetype/freetype.h>
-#include <freetype/tttables.h>
-#endif
-
-#include <harfbuzz-shaper.h>
-#include "harfbuzz-unicode.h"
-
-static HB_Bool
-hb_freetype_string_to_glyphs(HB_Font font,
-                             const HB_UChar16 *chars, hb_uint32 len,
-                             HB_Glyph *glyphs, hb_uint32 *numGlyphs,
-                             HB_Bool is_rtl) {
-  FT_Face face = (FT_Face) font->userData;
-  if (len > *numGlyphs)
-    return 0;
-
-  size_t i = 0, j = 0;
-  while (i < len) {
-    const uint32_t cp = utf16_to_code_point(chars, len, &i);
-    glyphs[j++] = FT_Get_Char_Index(face, cp);
-  }
-
-  *numGlyphs = j;
-
-  return 1;
-}
-
-static void
-hb_freetype_advances_get(HB_Font font, const HB_Glyph *glyphs, hb_uint32 len,
-                         HB_Fixed *advances, int flags) {
-  FT_Face face = (FT_Face) font->userData;
-
-  hb_uint32 i;
-  for (i = 0; i < len; ++i) {
-    const FT_Error error = FT_Load_Glyph(face, glyphs[i], FT_LOAD_DEFAULT);
-    if (error) {
-      advances[i] = 0;
-      continue;
-    }
-
-    advances[i] = face->glyph->advance.x;
-  }
-}
-
-static HB_Bool
-hb_freetype_can_render(HB_Font font, const HB_UChar16 *chars, hb_uint32 len) {
-  FT_Face face = (FT_Face)font->userData;
-
-  size_t i = 0;
-  while (i < len) {
-    const uint32_t cp = utf16_to_code_point(chars, len, &i);
-    if (FT_Get_Char_Index(face, cp) == 0)
-      return 0;
-  }
-
-  return 1;
-}
-
-static HB_Error
-hb_freetype_outline_point_get(HB_Font font, HB_Glyph glyph, int flags,
-                              hb_uint32 point, HB_Fixed *xpos, HB_Fixed *ypos,
-                              hb_uint32 *n_points) {
-  HB_Error error = HB_Err_Ok;
-  FT_Face face = (FT_Face) font->userData;
-
-  int load_flags = (flags & HB_ShaperFlag_UseDesignMetrics) ? FT_LOAD_NO_HINTING : FT_LOAD_DEFAULT;
-
-  if ((error = (HB_Error) FT_Load_Glyph(face, glyph, load_flags)))
-    return error;
-
-  if (face->glyph->format != ft_glyph_format_outline)
-    return (HB_Error)HB_Err_Invalid_SubTable;
-
-  *n_points = face->glyph->outline.n_points;
-  if (!(*n_points))
-    return HB_Err_Ok;
-
-  if (point > *n_points)
-    return (HB_Error)HB_Err_Invalid_SubTable;
-
-  *xpos = face->glyph->outline.points[point].x;
-  *ypos = face->glyph->outline.points[point].y;
-
-  return HB_Err_Ok;
-}
-
-static void
-hb_freetype_glyph_metrics_get(HB_Font font, HB_Glyph glyph,
-                              HB_GlyphMetrics *metrics) {
-  FT_Face face = (FT_Face) font->userData;
-
-  const FT_Error error = FT_Load_Glyph(face, glyph, FT_LOAD_DEFAULT);
-  if (error) {
-    metrics->x = metrics->y = metrics->width = metrics->height = 0;
-    metrics->xOffset = metrics->yOffset = 0;
-    return;
-  }
-
-  const FT_Glyph_Metrics *ftmetrics = &face->glyph->metrics;
-  metrics->width = ftmetrics->width;
-  metrics->height = ftmetrics->height;
-  metrics->x = ftmetrics->horiAdvance;
-  metrics->y = 0;  // unclear what this is
-  metrics->xOffset = ftmetrics->horiBearingX;
-  metrics->yOffset = ftmetrics->horiBearingY;
-}
-
-static HB_Fixed
-hb_freetype_font_metric_get(HB_Font font, HB_FontMetric metric) {
-  FT_Face face = (FT_Face) font->userData;
-
-  switch (metric) {
-  case HB_FontAscent:
-    // Note that we aren't scanning the VDMX table which we probably would in
-    // an ideal world.
-    return face->ascender;
-  default:
-    return 0;
-  }
-}
-
-const HB_FontClass hb_freetype_class = {
-  hb_freetype_string_to_glyphs,
-  hb_freetype_advances_get,
-  hb_freetype_can_render,
-  hb_freetype_outline_point_get,
-  hb_freetype_glyph_metrics_get,
-  hb_freetype_font_metric_get,
-};
-
-HB_Error
-hb_freetype_table_sfnt_get(void *voidface, const HB_Tag tag, HB_Byte *buffer, HB_UInt *len) {
-  FT_Face face = (FT_Face) voidface;
-  FT_ULong ftlen = *len;
-
-  if (!FT_IS_SFNT(face))
-    return HB_Err_Invalid_Argument;
-
-  const FT_Error error = FT_Load_Sfnt_Table(face, tag, 0, buffer, &ftlen);
-  *len = ftlen;
-  return (HB_Error) error;
-}