1c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)/* 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * Copyright © 2011 Martin Hosken 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * Copyright © 2011 SIL International 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * Copyright © 2011,2012 Google, Inc. 55821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * This is part of HarfBuzz, a text shaping library. 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * 8a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) * Permission is hereby granted, without written agreement and without 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * license or royalty fees, to use, copy, modify, and distribute this 10f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) * software and its documentation for any purpose, provided that the 115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * above copyright notice and the following two paragraphs appear in 12a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) * all copies of this software. 137dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch * 14868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR 15eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES 16eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN 172a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH 18a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) * DAMAGE. 19a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) * 20a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND 22a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS 23e6402284a6517cc047655bc051a7f1269e182040Ben Murdoch * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO 24868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. 25868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) * 26868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) * Google Author(s): Behdad Esfahbod 27868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) */ 28868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) 29a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles)#define HB_SHAPER graphite2 30a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles)#define hb_graphite2_shaper_font_data_t gr_font 31eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch#include "hb-shaper-impl-private.hh" 327dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "hb-graphite2.h" 34a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) 35a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles)#include <graphite2/Segment.h> 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "hb-ot-tag.h" 38c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) 395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)HB_SHAPER_DATA_ENSURE_DECLARE(graphite2, face) 415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)HB_SHAPER_DATA_ENSURE_DECLARE(graphite2, font) 425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)/* 45f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) * shaper face data 465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) */ 47f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)typedef struct hb_graphite2_tablelist_t { 49f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) struct hb_graphite2_tablelist_t *next; 508bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) hb_blob_t *blob; 51f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) unsigned int tag; 528bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles)} hb_graphite2_tablelist_t; 53a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) 542a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)struct hb_graphite2_shaper_face_data_t { 555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) hb_face_t *face; 562a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) gr_face *grface; 572a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) hb_graphite2_tablelist_t *tlist; 5890dce4d38c5ff5333bea97d859d4e484e27edf0cTorne (Richard Coles)}; 592a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)static const void *hb_graphite2_get_table (const void *data, unsigned int tag, size_t *len) 615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles){ 62a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) hb_graphite2_shaper_face_data_t *face_data = (hb_graphite2_shaper_face_data_t *) data; 63a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) hb_graphite2_tablelist_t *tlist = face_data->tlist; 64a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) 65a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) hb_blob_t *blob = NULL; 66a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) 67a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) for (hb_graphite2_tablelist_t *p = tlist; p; p = p->next) 68a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) if (p->tag == tag) { 69a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) blob = p->blob; 70a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) break; 71a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) } 72a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) 73a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) if (unlikely (!blob)) 74a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) { 75a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) blob = face_data->face->reference_table (tag); 76a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) 77a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) hb_graphite2_tablelist_t *p = (hb_graphite2_tablelist_t *) calloc (1, sizeof (hb_graphite2_tablelist_t)); 78a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) if (unlikely (!p)) { 79a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) hb_blob_destroy (blob); 80a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) return NULL; 81a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) } 82a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) p->blob = blob; 83a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) p->tag = tag; 84a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) 85a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) /* TODO Not thread-safe, but fairly harmless. 86a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) * We can do the double-chcked pointer cmpexch thing here. */ 87a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) p->next = face_data->tlist; 88a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) face_data->tlist = p; 89a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) } 90a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) 91a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) unsigned int tlen; 92a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) const char *d = hb_blob_get_data (blob, &tlen); 93a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) *len = tlen; 94a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) return d; 95a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles)} 96a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) 97a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles)hb_graphite2_shaper_face_data_t * 98a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles)_hb_graphite2_shaper_face_data_create (hb_face_t *face) 99a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles){ 100a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) hb_blob_t *silf_blob = face->reference_table (HB_GRAPHITE2_TAG_SILF); 101a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) /* Umm, we just reference the table to check whether it exists. 102a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) * Maybe add better API for this? */ 103a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) if (!hb_blob_get_length (silf_blob)) 104a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) { 105a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) hb_blob_destroy (silf_blob); 106a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) return NULL; 107a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) } 108a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) hb_blob_destroy (silf_blob); 109a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) 110a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) hb_graphite2_shaper_face_data_t *data = (hb_graphite2_shaper_face_data_t *) calloc (1, sizeof (hb_graphite2_shaper_face_data_t)); 111a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) if (unlikely (!data)) 112a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) hb_blob_destroy (silf_blob); 113a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) 114a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) data->face = face; 115a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) data->grface = gr_make_face (data, &hb_graphite2_get_table, gr_face_preloadAll); 1165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (unlikely (!data->grface)) { 1185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) free (data); 119eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch return NULL; 120a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) } 121eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch 122eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch return data; 123eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch} 124eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch 125eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdochvoid 1265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)_hb_graphite2_shaper_face_data_destroy (hb_graphite2_shaper_face_data_t *data) 1275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles){ 1285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) hb_graphite2_tablelist_t *tlist = data->tlist; 1295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) while (tlist) 1315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) { 1325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) hb_graphite2_tablelist_t *old = tlist; 1335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) hb_blob_destroy (tlist->blob); 1345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) tlist = tlist->next; 1355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) free (old); 1365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 138f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) gr_face_destroy (data->grface); 139f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 140f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) free (data); 1414e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles)} 1425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)gr_face * 1445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)hb_graphite2_face_get_gr_face (hb_face_t *face) 1455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles){ 1465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (unlikely (!hb_graphite2_shaper_face_data_ensure (face))) return NULL; 1475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return HB_SHAPER_DATA_GET (face)->grface; 1485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)/* 1525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * shaper font data 1535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) */ 1545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)static float hb_graphite2_get_advance (const void *hb_font, unsigned short gid) 156e6402284a6517cc047655bc051a7f1269e182040Ben Murdoch{ 1575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return ((hb_font_t *) hb_font)->get_glyph_h_advance (gid); 1585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 159868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) 160868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles)hb_graphite2_shaper_font_data_t * 161868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles)_hb_graphite2_shaper_font_data_create (hb_font_t *font) 162868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles){ 163868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) if (unlikely (!hb_graphite2_shaper_face_data_ensure (font->face))) return NULL; 164868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) 1655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) hb_face_t *face = font->face; 1665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) hb_graphite2_shaper_face_data_t *face_data = HB_SHAPER_DATA_GET (face); 1675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return gr_make_font_with_advance_fn (font->x_scale, font, &hb_graphite2_get_advance, face_data->grface); 1695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1702a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 1715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void 1725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)_hb_graphite2_shaper_font_data_destroy (hb_graphite2_shaper_font_data_t *data) 1735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles){ 1742a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) gr_font_destroy (data); 1755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 177f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)gr_font * 178f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)hb_graphite2_font_get_gr_font (hb_font_t *font) 179f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles){ 180f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) if (unlikely (!hb_graphite2_shaper_font_data_ensure (font))) return NULL; 181f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) return HB_SHAPER_DATA_GET (font); 1825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 183 184 185/* 186 * shaper shape_plan data 187 */ 188 189struct hb_graphite2_shaper_shape_plan_data_t {}; 190 191hb_graphite2_shaper_shape_plan_data_t * 192_hb_graphite2_shaper_shape_plan_data_create (hb_shape_plan_t *shape_plan HB_UNUSED, 193 const hb_feature_t *user_features HB_UNUSED, 194 unsigned int num_user_features HB_UNUSED) 195{ 196 return (hb_graphite2_shaper_shape_plan_data_t *) HB_SHAPER_DATA_SUCCEEDED; 197} 198 199void 200_hb_graphite2_shaper_shape_plan_data_destroy (hb_graphite2_shaper_shape_plan_data_t *data HB_UNUSED) 201{ 202} 203 204 205/* 206 * shaper 207 */ 208 209struct hb_graphite2_cluster_t { 210 unsigned int base_char; 211 unsigned int num_chars; 212 unsigned int base_glyph; 213 unsigned int num_glyphs; 214}; 215 216hb_bool_t 217_hb_graphite2_shape (hb_shape_plan_t *shape_plan, 218 hb_font_t *font, 219 hb_buffer_t *buffer, 220 const hb_feature_t *features, 221 unsigned int num_features) 222{ 223 hb_face_t *face = font->face; 224 gr_face *grface = HB_SHAPER_DATA_GET (face)->grface; 225 gr_font *grfont = HB_SHAPER_DATA_GET (font); 226 227 const char *lang = hb_language_to_string (hb_buffer_get_language (buffer)); 228 const char *lang_end = lang ? strchr (lang, '-') : NULL; 229 int lang_len = lang_end ? lang_end - lang : -1; 230 gr_feature_val *feats = gr_face_featureval_for_lang (grface, lang ? hb_tag_from_string (lang, lang_len) : 0); 231 232 while (num_features--) 233 { 234 const gr_feature_ref *fref = gr_face_find_fref (grface, features->tag); 235 if (fref) 236 gr_fref_set_feature_value (fref, features->value, feats); 237 features++; 238 } 239 240 gr_segment *seg = NULL; 241 const gr_slot *is; 242 unsigned int ci = 0, ic = 0; 243 float curradvx = 0., curradvy = 0.; 244 245 unsigned int scratch_size; 246 hb_buffer_t::scratch_buffer_t *scratch = buffer->get_scratch_buffer (&scratch_size); 247 248 uint32_t *chars = (uint32_t *) scratch; 249 250 for (unsigned int i = 0; i < buffer->len; ++i) 251 chars[i] = buffer->info[i].codepoint; 252 253 hb_tag_t script_tag[2]; 254 hb_ot_tags_from_script (hb_buffer_get_script (buffer), &script_tag[0], &script_tag[1]); 255 256 seg = gr_make_seg (grfont, grface, 257 script_tag[1] == HB_TAG_NONE ? script_tag[0] : script_tag[1], 258 feats, 259 gr_utf32, chars, buffer->len, 260 2 | (hb_buffer_get_direction (buffer) == HB_DIRECTION_RTL ? 1 : 0)); 261 262 if (unlikely (!seg)) { 263 if (feats) gr_featureval_destroy (feats); 264 return false; 265 } 266 267 unsigned int glyph_count = gr_seg_n_slots (seg); 268 if (unlikely (!glyph_count)) { 269 if (feats) gr_featureval_destroy (feats); 270 gr_seg_destroy (seg); 271 return false; 272 } 273 274 scratch = buffer->get_scratch_buffer (&scratch_size); 275 while ((DIV_CEIL (sizeof (hb_graphite2_cluster_t) * buffer->len, sizeof (*scratch)) + 276 DIV_CEIL (sizeof (hb_codepoint_t) * glyph_count, sizeof (*scratch))) > scratch_size) 277 { 278 buffer->ensure (buffer->allocated * 2); 279 if (unlikely (buffer->in_error)) { 280 if (feats) gr_featureval_destroy (feats); 281 gr_seg_destroy (seg); 282 return false; 283 } 284 scratch = buffer->get_scratch_buffer (&scratch_size); 285 } 286 287#define ALLOCATE_ARRAY(Type, name, len) \ 288 Type *name = (Type *) scratch; \ 289 { \ 290 unsigned int _consumed = DIV_CEIL ((len) * sizeof (Type), sizeof (*scratch)); \ 291 assert (_consumed <= scratch_size); \ 292 scratch += _consumed; \ 293 scratch_size -= _consumed; \ 294 } 295 296 ALLOCATE_ARRAY (hb_graphite2_cluster_t, clusters, buffer->len); 297 ALLOCATE_ARRAY (hb_codepoint_t, gids, glyph_count); 298 299#undef ALLOCATE_ARRAY 300 301 memset (clusters, 0, sizeof (clusters[0]) * buffer->len); 302 303 hb_codepoint_t *pg = gids; 304 for (is = gr_seg_first_slot (seg), ic = 0; is; is = gr_slot_next_in_segment (is), ic++) 305 { 306 unsigned int before = gr_slot_before (is); 307 unsigned int after = gr_slot_after (is); 308 *pg = gr_slot_gid (is); 309 pg++; 310 while (clusters[ci].base_char > before && ci) 311 { 312 clusters[ci-1].num_chars += clusters[ci].num_chars; 313 clusters[ci-1].num_glyphs += clusters[ci].num_glyphs; 314 ci--; 315 } 316 317 if (gr_slot_can_insert_before (is) && clusters[ci].num_chars && before >= clusters[ci].base_char + clusters[ci].num_chars) 318 { 319 hb_graphite2_cluster_t *c = clusters + ci + 1; 320 c->base_char = clusters[ci].base_char + clusters[ci].num_chars; 321 c->num_chars = before - c->base_char; 322 c->base_glyph = ic; 323 c->num_glyphs = 0; 324 ci++; 325 } 326 clusters[ci].num_glyphs++; 327 328 if (clusters[ci].base_char + clusters[ci].num_chars < after + 1) 329 clusters[ci].num_chars = after + 1 - clusters[ci].base_char; 330 } 331 ci++; 332 333 //buffer->clear_output (); 334 for (unsigned int i = 0; i < ci; ++i) 335 { 336 for (unsigned int j = 0; j < clusters[i].num_glyphs; ++j) 337 { 338 hb_glyph_info_t *info = &buffer->info[clusters[i].base_glyph + j]; 339 info->codepoint = gids[clusters[i].base_glyph + j]; 340 info->cluster = gr_cinfo_base(gr_seg_cinfo(seg, clusters[i].base_char)); 341 } 342 } 343 buffer->len = glyph_count; 344 //buffer->swap_buffers (); 345 346 if (HB_DIRECTION_IS_BACKWARD(buffer->props.direction)) 347 curradvx = gr_seg_advance_X(seg); 348 349 hb_glyph_position_t *pPos; 350 for (pPos = hb_buffer_get_glyph_positions (buffer, NULL), is = gr_seg_first_slot (seg); 351 is; pPos++, is = gr_slot_next_in_segment (is)) 352 { 353 pPos->x_offset = gr_slot_origin_X (is) - curradvx; 354 pPos->y_offset = gr_slot_origin_Y (is) - curradvy; 355 pPos->x_advance = gr_slot_advance_X (is, grface, grfont); 356 pPos->y_advance = gr_slot_advance_Y (is, grface, grfont); 357 if (HB_DIRECTION_IS_BACKWARD (buffer->props.direction)) 358 curradvx -= pPos->x_advance; 359 pPos->x_offset = gr_slot_origin_X (is) - curradvx; 360 if (!HB_DIRECTION_IS_BACKWARD (buffer->props.direction)) 361 curradvx += pPos->x_advance; 362 pPos->y_offset = gr_slot_origin_Y (is) - curradvy; 363 curradvy += pPos->y_advance; 364 } 365 if (!HB_DIRECTION_IS_BACKWARD (buffer->props.direction)) 366 pPos[-1].x_advance += gr_seg_advance_X(seg) - curradvx; 367 368 if (HB_DIRECTION_IS_BACKWARD (buffer->props.direction)) 369 hb_buffer_reverse_clusters (buffer); 370 371 if (feats) gr_featureval_destroy (feats); 372 gr_seg_destroy (seg); 373 374 return true; 375} 376