diff options
Diffstat (limited to 'Build/source/libs/harfbuzz/harfbuzz-0.9.41/src/hb-graphite2.cc')
-rw-r--r-- | Build/source/libs/harfbuzz/harfbuzz-0.9.41/src/hb-graphite2.cc | 376 |
1 files changed, 0 insertions, 376 deletions
diff --git a/Build/source/libs/harfbuzz/harfbuzz-0.9.41/src/hb-graphite2.cc b/Build/source/libs/harfbuzz/harfbuzz-0.9.41/src/hb-graphite2.cc deleted file mode 100644 index 807c3308771..00000000000 --- a/Build/source/libs/harfbuzz/harfbuzz-0.9.41/src/hb-graphite2.cc +++ /dev/null @@ -1,376 +0,0 @@ -/* - * Copyright © 2011 Martin Hosken - * Copyright © 2011 SIL International - * Copyright © 2011,2012 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 graphite2 -#define hb_graphite2_shaper_font_data_t gr_font -#include "hb-shaper-impl-private.hh" - -#include "hb-graphite2.h" - -#include <graphite2/Segment.h> - - -HB_SHAPER_DATA_ENSURE_DECLARE(graphite2, face) -HB_SHAPER_DATA_ENSURE_DECLARE(graphite2, font) - - -/* - * shaper face data - */ - -typedef struct hb_graphite2_tablelist_t { - struct hb_graphite2_tablelist_t *next; - hb_blob_t *blob; - unsigned int tag; -} hb_graphite2_tablelist_t; - -struct hb_graphite2_shaper_face_data_t { - hb_face_t *face; - gr_face *grface; - hb_graphite2_tablelist_t *tlist; -}; - -static const void *hb_graphite2_get_table (const void *data, unsigned int tag, size_t *len) -{ - hb_graphite2_shaper_face_data_t *face_data = (hb_graphite2_shaper_face_data_t *) data; - hb_graphite2_tablelist_t *tlist = face_data->tlist; - - hb_blob_t *blob = NULL; - - for (hb_graphite2_tablelist_t *p = tlist; p; p = p->next) - if (p->tag == tag) { - blob = p->blob; - break; - } - - if (unlikely (!blob)) - { - blob = face_data->face->reference_table (tag); - - hb_graphite2_tablelist_t *p = (hb_graphite2_tablelist_t *) calloc (1, sizeof (hb_graphite2_tablelist_t)); - if (unlikely (!p)) { - hb_blob_destroy (blob); - return NULL; - } - p->blob = blob; - p->tag = tag; - - /* TODO Not thread-safe, but fairly harmless. - * We can do the double-chcked pointer cmpexch thing here. */ - p->next = face_data->tlist; - face_data->tlist = p; - } - - unsigned int tlen; - const char *d = hb_blob_get_data (blob, &tlen); - *len = tlen; - return d; -} - -hb_graphite2_shaper_face_data_t * -_hb_graphite2_shaper_face_data_create (hb_face_t *face) -{ - hb_blob_t *silf_blob = face->reference_table (HB_GRAPHITE2_TAG_SILF); - /* Umm, we just reference the table to check whether it exists. - * Maybe add better API for this? */ - if (!hb_blob_get_length (silf_blob)) - { - hb_blob_destroy (silf_blob); - return NULL; - } - hb_blob_destroy (silf_blob); - - hb_graphite2_shaper_face_data_t *data = (hb_graphite2_shaper_face_data_t *) calloc (1, sizeof (hb_graphite2_shaper_face_data_t)); - if (unlikely (!data)) - return NULL; - - data->face = face; - data->grface = gr_make_face (data, &hb_graphite2_get_table, gr_face_preloadAll); - - if (unlikely (!data->grface)) { - free (data); - return NULL; - } - - return data; -} - -void -_hb_graphite2_shaper_face_data_destroy (hb_graphite2_shaper_face_data_t *data) -{ - hb_graphite2_tablelist_t *tlist = data->tlist; - - while (tlist) - { - hb_graphite2_tablelist_t *old = tlist; - hb_blob_destroy (tlist->blob); - tlist = tlist->next; - free (old); - } - - gr_face_destroy (data->grface); - - free (data); -} - -gr_face * -hb_graphite2_face_get_gr_face (hb_face_t *face) -{ - if (unlikely (!hb_graphite2_shaper_face_data_ensure (face))) return NULL; - return HB_SHAPER_DATA_GET (face)->grface; -} - - -/* - * shaper font data - */ - -static float hb_graphite2_get_advance (const void *hb_font, unsigned short gid) -{ - return ((hb_font_t *) hb_font)->get_glyph_h_advance (gid); -} - -hb_graphite2_shaper_font_data_t * -_hb_graphite2_shaper_font_data_create (hb_font_t *font) -{ - if (unlikely (!hb_graphite2_shaper_face_data_ensure (font->face))) return NULL; - - hb_face_t *face = font->face; - hb_graphite2_shaper_face_data_t *face_data = HB_SHAPER_DATA_GET (face); - - return gr_make_font_with_advance_fn (font->x_scale, font, &hb_graphite2_get_advance, face_data->grface); -} - -void -_hb_graphite2_shaper_font_data_destroy (hb_graphite2_shaper_font_data_t *data) -{ - gr_font_destroy (data); -} - -gr_font * -hb_graphite2_font_get_gr_font (hb_font_t *font) -{ - if (unlikely (!hb_graphite2_shaper_font_data_ensure (font))) return NULL; - return HB_SHAPER_DATA_GET (font); -} - - -/* - * shaper shape_plan data - */ - -struct hb_graphite2_shaper_shape_plan_data_t {}; - -hb_graphite2_shaper_shape_plan_data_t * -_hb_graphite2_shaper_shape_plan_data_create (hb_shape_plan_t *shape_plan HB_UNUSED, - const hb_feature_t *user_features HB_UNUSED, - unsigned int num_user_features HB_UNUSED) -{ - return (hb_graphite2_shaper_shape_plan_data_t *) HB_SHAPER_DATA_SUCCEEDED; -} - -void -_hb_graphite2_shaper_shape_plan_data_destroy (hb_graphite2_shaper_shape_plan_data_t *data HB_UNUSED) -{ -} - - -/* - * shaper - */ - -struct hb_graphite2_cluster_t { - unsigned int base_char; - unsigned int num_chars; - unsigned int base_glyph; - unsigned int num_glyphs; - unsigned int cluster; -}; - -hb_bool_t -_hb_graphite2_shape (hb_shape_plan_t *shape_plan, - hb_font_t *font, - hb_buffer_t *buffer, - const hb_feature_t *features, - unsigned int num_features) -{ - hb_face_t *face = font->face; - gr_face *grface = HB_SHAPER_DATA_GET (face)->grface; - gr_font *grfont = HB_SHAPER_DATA_GET (font); - - const char *lang = hb_language_to_string (hb_buffer_get_language (buffer)); - const char *lang_end = lang ? strchr (lang, '-') : NULL; - int lang_len = lang_end ? lang_end - lang : -1; - gr_feature_val *feats = gr_face_featureval_for_lang (grface, lang ? hb_tag_from_string (lang, lang_len) : 0); - - while (num_features--) - { - const gr_feature_ref *fref = gr_face_find_fref (grface, features->tag); - if (fref) - gr_fref_set_feature_value (fref, features->value, feats); - features++; - } - - gr_segment *seg = NULL; - const gr_slot *is; - unsigned int ci = 0, ic = 0; - float curradvx = 0., curradvy = 0.; - - unsigned int scratch_size; - hb_buffer_t::scratch_buffer_t *scratch = buffer->get_scratch_buffer (&scratch_size); - - uint32_t *chars = (uint32_t *) scratch; - - for (unsigned int i = 0; i < buffer->len; ++i) - chars[i] = buffer->info[i].codepoint; - - hb_tag_t script_tag[2]; - hb_ot_tags_from_script (hb_buffer_get_script (buffer), &script_tag[0], &script_tag[1]); - - seg = gr_make_seg (grfont, grface, - script_tag[1] == HB_TAG_NONE ? script_tag[0] : script_tag[1], - feats, - gr_utf32, chars, buffer->len, - 2 | (hb_buffer_get_direction (buffer) == HB_DIRECTION_RTL ? 1 : 0)); - - if (unlikely (!seg)) { - if (feats) gr_featureval_destroy (feats); - return false; - } - - unsigned int glyph_count = gr_seg_n_slots (seg); - if (unlikely (!glyph_count)) { - if (feats) gr_featureval_destroy (feats); - gr_seg_destroy (seg); - return false; - } - - scratch = buffer->get_scratch_buffer (&scratch_size); - while ((DIV_CEIL (sizeof (hb_graphite2_cluster_t) * buffer->len, sizeof (*scratch)) + - DIV_CEIL (sizeof (hb_codepoint_t) * glyph_count, sizeof (*scratch))) > scratch_size) - { - if (unlikely (!buffer->ensure (buffer->allocated * 2))) - { - if (feats) gr_featureval_destroy (feats); - gr_seg_destroy (seg); - return false; - } - scratch = buffer->get_scratch_buffer (&scratch_size); - } - -#define ALLOCATE_ARRAY(Type, name, len) \ - Type *name = (Type *) scratch; \ - { \ - unsigned int _consumed = DIV_CEIL ((len) * sizeof (Type), sizeof (*scratch)); \ - assert (_consumed <= scratch_size); \ - scratch += _consumed; \ - scratch_size -= _consumed; \ - } - - ALLOCATE_ARRAY (hb_graphite2_cluster_t, clusters, buffer->len); - ALLOCATE_ARRAY (hb_codepoint_t, gids, glyph_count); - -#undef ALLOCATE_ARRAY - - memset (clusters, 0, sizeof (clusters[0]) * buffer->len); - - hb_codepoint_t *pg = gids; - clusters[0].cluster = buffer->info[0].cluster; - for (is = gr_seg_first_slot (seg), ic = 0; is; is = gr_slot_next_in_segment (is), ic++) - { - unsigned int before = gr_slot_before (is); - unsigned int after = gr_slot_after (is); - *pg = gr_slot_gid (is); - pg++; - while (clusters[ci].base_char > before && ci) - { - clusters[ci-1].num_chars += clusters[ci].num_chars; - clusters[ci-1].num_glyphs += clusters[ci].num_glyphs; - ci--; - } - - if (gr_slot_can_insert_before (is) && clusters[ci].num_chars && before >= clusters[ci].base_char + clusters[ci].num_chars) - { - hb_graphite2_cluster_t *c = clusters + ci + 1; - c->base_char = clusters[ci].base_char + clusters[ci].num_chars; - c->cluster = buffer->info[c->base_char].cluster; - c->num_chars = before - c->base_char; - c->base_glyph = ic; - c->num_glyphs = 0; - ci++; - } - clusters[ci].num_glyphs++; - - if (clusters[ci].base_char + clusters[ci].num_chars < after + 1) - clusters[ci].num_chars = after + 1 - clusters[ci].base_char; - } - ci++; - - //buffer->clear_output (); - for (unsigned int i = 0; i < ci; ++i) - { - for (unsigned int j = 0; j < clusters[i].num_glyphs; ++j) - { - hb_glyph_info_t *info = &buffer->info[clusters[i].base_glyph + j]; - info->codepoint = gids[clusters[i].base_glyph + j]; - info->cluster = clusters[i].cluster; - } - } - buffer->len = glyph_count; - //buffer->swap_buffers (); - - if (HB_DIRECTION_IS_BACKWARD(buffer->props.direction)) - curradvx = gr_seg_advance_X(seg); - - hb_glyph_position_t *pPos; - for (pPos = hb_buffer_get_glyph_positions (buffer, NULL), is = gr_seg_first_slot (seg); - is; pPos++, is = gr_slot_next_in_segment (is)) - { - pPos->x_offset = gr_slot_origin_X (is) - curradvx; - pPos->y_offset = gr_slot_origin_Y (is) - curradvy; - pPos->x_advance = gr_slot_advance_X (is, grface, grfont); - pPos->y_advance = gr_slot_advance_Y (is, grface, grfont); - if (HB_DIRECTION_IS_BACKWARD (buffer->props.direction)) - curradvx -= pPos->x_advance; - pPos->x_offset = gr_slot_origin_X (is) - curradvx; - if (!HB_DIRECTION_IS_BACKWARD (buffer->props.direction)) - curradvx += pPos->x_advance; - pPos->y_offset = gr_slot_origin_Y (is) - curradvy; - curradvy += pPos->y_advance; - } - if (!HB_DIRECTION_IS_BACKWARD (buffer->props.direction)) - pPos[-1].x_advance += gr_seg_advance_X(seg) - curradvx; - - if (HB_DIRECTION_IS_BACKWARD (buffer->props.direction)) - hb_buffer_reverse_clusters (buffer); - - if (feats) gr_featureval_destroy (feats); - gr_seg_destroy (seg); - - return true; -} |