Update harfbuzz-ng to 0.9.24

third_party/harfbuzz-ng/src/hb-icu-le.cc

-/*
- * Copyright © 2012  Google, Inc.
- *
- *  This is part of HarfBuzz, a text shaping library.
- *
- * Permission is hereby granted, without written agreement and without
- * license or royalty fees, to use, copy, modify, and distribute this
- * software and its documentation for any purpose, provided that the
- * above copyright notice and the following two paragraphs appear in
- * all copies of this software.
- *
- * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
- * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
- * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
- * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
- * DAMAGE.
- *
- * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
- * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
- * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
- * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
- * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
- *
- * Google Author(s): Behdad Esfahbod
- */
-
-#define HB_SHAPER icu_le
-#define hb_icu_le_shaper_font_data_t PortableFontInstance
-#include "hb-shaper-impl-private.hh"
-
-#include "hb-icu-le/PortableFontInstance.h"
-
-#include "layout/loengine.h"
-#include "unicode/unistr.h"
-
-#include "hb-icu.h"
-
-
-/*
- * shaper face data
- */
-
-struct hb_icu_le_shaper_face_data_t {};
-
-hb_icu_le_shaper_face_data_t *
-_hb_icu_le_shaper_face_data_create (hb_face_t *face HB_UNUSED)
-{
-  return (hb_icu_le_shaper_face_data_t *) HB_SHAPER_DATA_SUCCEEDED;
-}
-
-void
-_hb_icu_le_shaper_face_data_destroy (hb_icu_le_shaper_face_data_t *data HB_UNUSED)
-{
-}
-
-
-/*
- * shaper font data
- */
-
-hb_icu_le_shaper_font_data_t *
-_hb_icu_le_shaper_font_data_create (hb_font_t *font)
-{
-  LEErrorCode status = LE_NO_ERROR;
-  hb_icu_le_shaper_font_data_t *data = new PortableFontInstance (font->face,
-                                                                 font->x_scale,
-                                                                 font->y_scale,
-                                                                 status);
-  if (status != LE_NO_ERROR) {
-    delete (data);
-    return NULL;
-  }
-
-  return data;
-}
-
-void
-_hb_icu_le_shaper_font_data_destroy (hb_icu_le_shaper_font_data_t *data)
-{
-  delete (data);
-}
-
-
-/*
- * shaper shape_plan data
- */
-
-struct hb_icu_le_shaper_shape_plan_data_t {};
-
-hb_icu_le_shaper_shape_plan_data_t *
-_hb_icu_le_shaper_shape_plan_data_create (hb_shape_plan_t    *shape_plan HB_UNUSED,
-                                          const hb_feature_t *user_features,
-                                          unsigned int        num_user_features)
-{
-  return (hb_icu_le_shaper_shape_plan_data_t *) HB_SHAPER_DATA_SUCCEEDED;
-}
-
-void
-_hb_icu_le_shaper_shape_plan_data_destroy (hb_icu_le_shaper_shape_plan_data_t *data)
-{
-}
-
-
-/*
- * shaper
- */
-
-hb_bool_t
-_hb_icu_le_shape (hb_shape_plan_t    *shape_plan,
-                  hb_font_t          *font,
-                  hb_buffer_t        *buffer,
-                  const hb_feature_t *features,
-                  unsigned int        num_features)
-{
-  LEFontInstance *font_instance = HB_SHAPER_DATA_GET (font);
-  le_int32 script_code = hb_icu_script_from_script (shape_plan->props.script);
-  le_int32 language_code = -1 /* TODO */;
-  le_int32 typography_flags = 3; /* Needed for ligatures and kerning */
-  LEErrorCode status = LE_NO_ERROR;
-  le_engine *le = le_create ((const le_font *) font_instance,
-                             script_code,
-                             language_code,
-                             typography_flags,
-                             &status);
-  if (status != LE_NO_ERROR)
-  { le_close (le); return false; }
-
-retry:
-
-  unsigned int scratch_size;
-  char *scratch = (char *) buffer->get_scratch_buffer (&scratch_size);
-
-#define ALLOCATE_ARRAY(Type, name, len) \
-  Type *name = (Type *) scratch; \
-  scratch += (len) * sizeof ((name)[0]); \
-  scratch_size -= (len) * sizeof ((name)[0]);
-
-  ALLOCATE_ARRAY (LEUnicode, chars, buffer->len);
-  ALLOCATE_ARRAY (unsigned int, clusters, buffer->len);
-
-  /* XXX Use UTF-16 decoder! */
-  for (unsigned int i = 0; i < buffer->len; i++) {
-    chars[i] = buffer->info[i].codepoint;
-    clusters[i] = buffer->info[i].cluster;
-  }
-
-  unsigned int glyph_count = le_layoutChars (le,
-                                             chars,
-                                             0,
-                                             buffer->len,
-                                             buffer->len,
-                                             HB_DIRECTION_IS_BACKWARD (buffer->props.direction),
-                                             0., 0.,
-                                             &status);
-  if (status != LE_NO_ERROR)
-  { le_close (le); return false; }
-
-  unsigned int num_glyphs = scratch_size / (sizeof (LEGlyphID) +
-                                            sizeof (le_int32) +
-                                            sizeof (float) * 2);
-
-  if (unlikely (glyph_count >= num_glyphs || glyph_count > buffer->allocated)) {
-    buffer->ensure (buffer->allocated * 2);
-    if (buffer->in_error)
-    { le_close (le); return false; }
-    goto retry;
-  }
-
-  ALLOCATE_ARRAY (LEGlyphID, glyphs, glyph_count);
-  ALLOCATE_ARRAY (le_int32, indices, glyph_count);
-  ALLOCATE_ARRAY (float, positions, glyph_count * 2 + 2);
-
-  le_getGlyphs (le, glyphs, &status);
-  le_getCharIndices (le, indices, &status);
-  le_getGlyphPositions (le, positions, &status);
-
-#undef ALLOCATE_ARRAY
-
-  /* Ok, we've got everything we need, now compose output buffer,
-   * very, *very*, carefully! */
-
-  unsigned int j = 0;
-  hb_glyph_info_t *info = buffer->info;
-  for (unsigned int i = 0; i < glyph_count; i++)
-  {
-    if (glyphs[i] >= 0xFFFE)
-        continue;
-
-    info[j].codepoint = glyphs[i];
-    info[j].cluster = clusters[indices[i]];
-
-    /* icu-le doesn't seem to have separate advance values. */
-    info[j].mask = positions[2 * i + 2] - positions[2 * i];
-    info[j].var1.u32 = 0;
-    info[j].var2.u32 = -positions[2 * i + 1];
-
-    j++;
-  }
-  buffer->len = j;
-
-  buffer->clear_positions ();
-
-  for (unsigned int i = 0; i < buffer->len; i++) {
-    hb_glyph_info_t *info = &buffer->info[i];
-    hb_glyph_position_t *pos = &buffer->pos[i];
-
-    /* TODO vertical */
-    pos->x_advance = info->mask;
-    pos->x_offset = info->var1.u32;
-    pos->y_offset = info->var2.u32;
-  }
-
-  le_close (le);
-  return true;
-}