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diff --git a/src/hb-ot-shape-complex-misc.cc b/src/hb-ot-shape-complex-misc.cc
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-/*
- * Copyright © 2010,2012 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
- */
-
-#include "hb-ot-shape-complex-private.hh"
-
-
-/* TODO Add kana, and other small shapers here */
-
-
-/* The default shaper *only* adds additional per-script features.*/
-
-static const hb_tag_t hangul_features[] =
-{
- HB_TAG('l','j','m','o'),
- HB_TAG('v','j','m','o'),
- HB_TAG('t','j','m','o'),
- HB_TAG_NONE
-};
-
-static const hb_tag_t tibetan_features[] =
-{
- HB_TAG('a','b','v','s'),
- HB_TAG('b','l','w','s'),
- HB_TAG('a','b','v','m'),
- HB_TAG('b','l','w','m'),
- HB_TAG_NONE
-};
-
-static void
-collect_features_default (hb_ot_shape_planner_t *plan)
-{
- const hb_tag_t *script_features = NULL;
-
- switch ((hb_tag_t) plan->props.script)
- {
- /* Unicode-1.1 additions */
- case HB_SCRIPT_HANGUL:
- script_features = hangul_features;
- break;
-
- /* Unicode-2.0 additions */
- case HB_SCRIPT_TIBETAN:
- script_features = tibetan_features;
- break;
- }
-
- for (; script_features && *script_features; script_features++)
- plan->map.add_bool_feature (*script_features);
-}
-
-static hb_ot_shape_normalization_mode_t
-normalization_preference_default (const hb_ot_shape_plan_t *plan)
-{
- switch ((hb_tag_t) plan->props.script)
- {
- /* Unicode-1.1 additions */
- case HB_SCRIPT_HANGUL:
- return HB_OT_SHAPE_NORMALIZATION_MODE_COMPOSED_FULL;
- }
- return HB_OT_SHAPE_NORMALIZATION_MODE_COMPOSED_DIACRITICS;
-}
-
-const hb_ot_complex_shaper_t _hb_ot_complex_shaper_default =
-{
- "default",
- collect_features_default,
- NULL, /* override_features */
- NULL, /* data_create */
- NULL, /* data_destroy */
- NULL, /* preprocess_text */
- normalization_preference_default,
- NULL, /* setup_masks */
- true, /* zero_width_attached_marks */
-};
-
-
-/* Thai / Lao shaper */
-
-static void
-preprocess_text_thai (const hb_ot_shape_plan_t *plan HB_UNUSED,
- hb_buffer_t *buffer,
- hb_font_t *font HB_UNUSED)
-{
- /* The following is NOT specified in the MS OT Thai spec, however, it seems
- * to be what Uniscribe and other engines implement. According to Eric Muller:
- *
- * When you have a SARA AM, decompose it in NIKHAHIT + SARA AA, *and* move the
- * NIKHAHIT backwards over any tone mark (0E48-0E4B).
- *
- * <0E14, 0E4B, 0E33> -> <0E14, 0E4D, 0E4B, 0E32>
- *
- * This reordering is legit only when the NIKHAHIT comes from a SARA AM, not
- * when it's there to start with. The string <0E14, 0E4B, 0E4D> is probably
- * not what a user wanted, but the rendering is nevertheless nikhahit above
- * chattawa.
- *
- * Same for Lao.
- *
- * Note:
- *
- * Uniscribe also does so below-marks reordering. Namely, it positions U+0E3A
- * after U+0E38 and U+0E39. We do that by modifying the ccc for U+0E3A.
- * See unicode->modified_combining_class (). Lao does NOT have a U+0E3A
- * equivalent.
- */
-
-
- /*
- * Here are the characters of significance:
- *
- * Thai Lao
- * SARA AM: U+0E33 U+0EB3
- * SARA AA: U+0E32 U+0EB2
- * Nikhahit: U+0E4D U+0ECD
- *
- * Testing shows that Uniscribe reorder the following marks:
- * Thai: <0E31,0E34..0E37,0E47..0E4E>
- * Lao: <0EB1,0EB4..0EB7,0EC7..0ECE>
- *
- * Note how the Lao versions are the same as Thai + 0x80.
- */
-
- /* We only get one script at a time, so a script-agnostic implementation
- * is adequate here. */
-#define IS_SARA_AM(x) (((x) & ~0x0080) == 0x0E33)
-#define NIKHAHIT_FROM_SARA_AM(x) ((x) - 0xE33 + 0xE4D)
-#define SARA_AA_FROM_SARA_AM(x) ((x) - 1)
-#define IS_TONE_MARK(x) (hb_in_ranges<hb_codepoint_t> ((x) & ~0x0080, 0x0E34, 0x0E37, 0x0E47, 0x0E4E, 0x0E31, 0x0E31))
-
- buffer->clear_output ();
- unsigned int count = buffer->len;
- for (buffer->idx = 0; buffer->idx < count;)
- {
- hb_codepoint_t u = buffer->cur().codepoint;
- if (likely (!IS_SARA_AM (u))) {
- buffer->next_glyph ();
- continue;
- }
-
- /* Is SARA AM. Decompose and reorder. */
- hb_codepoint_t decomposed[2] = {hb_codepoint_t (NIKHAHIT_FROM_SARA_AM (u)),
- hb_codepoint_t (SARA_AA_FROM_SARA_AM (u))};
- buffer->replace_glyphs (1, 2, decomposed);
- if (unlikely (buffer->in_error))
- return;
-
- /* Ok, let's see... */
- unsigned int end = buffer->out_len;
- unsigned int start = end - 2;
- while (start > 0 && IS_TONE_MARK (buffer->out_info[start - 1].codepoint))
- start--;
-
- if (start + 2 < end)
- {
- /* Move Nikhahit (end-2) to the beginning */
- buffer->merge_out_clusters (start, end);
- hb_glyph_info_t t = buffer->out_info[end - 2];
- memmove (buffer->out_info + start + 1,
- buffer->out_info + start,
- sizeof (buffer->out_info[0]) * (end - start - 2));
- buffer->out_info[start] = t;
- }
- else
- {
- /* Since we decomposed, and NIKHAHIT is combining, merge clusters with the
- * previous cluster. */
- if (start)
- buffer->merge_out_clusters (start - 1, end);
- }
- }
- buffer->swap_buffers ();
-}
-
-const hb_ot_complex_shaper_t _hb_ot_complex_shaper_thai =
-{
- "thai",
- NULL, /* collect_features */
- NULL, /* override_features */
- NULL, /* data_create */
- NULL, /* data_destroy */
- preprocess_text_thai,
- NULL, /* normalization_preference */
- NULL, /* setup_masks */
- true, /* zero_width_attached_marks */
-};
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