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hb-wasm-api-face.hh (2717B)

      1 /*
      2 * Copyright © 2023  Behdad Esfahbod
      3 *
      4 *  This is part of HarfBuzz, a text shaping library.
      5 *
      6 * Permission is hereby granted, without written agreement and without
      7 * license or royalty fees, to use, copy, modify, and distribute this
      8 * software and its documentation for any purpose, provided that the
      9 * above copyright notice and the following two paragraphs appear in
     10 * all copies of this software.
     11 *
     12 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
     13 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
     14 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
     15 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
     16 * DAMAGE.
     17 *
     18 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
     19 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
     20 * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
     21 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
     22 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
     23 */
     24 
     25 #ifndef HB_WASM_API_FACE_HH
     26 #define HB_WASM_API_FACE_HH
     27 
     28 #include "hb-wasm-api.hh"
     29 
     30 namespace hb {
     31 namespace wasm {
     32 
     33 
     34 HB_WASM_API (ptr_t(face_t), face_create) (HB_WASM_EXEC_ENV
     35 				  ptr_d(blob_t, blob),
     36 				  unsigned int index)
     37 {
     38  HB_PTR_PARAM (blob_t, blob);
     39  hb_blob_t *hb_blob = hb_blob_create(
     40 			      HB_ARRAY_APP2NATIVE (char, blob->data, blob->length),
     41 			      blob->length,
     42 			      HB_MEMORY_MODE_DUPLICATE,
     43 			      NULL,
     44 			      NULL);
     45 
     46  hb_face_t *face = hb_face_create(hb_blob, index);
     47 
     48  HB_OBJ2REF (face);
     49  return faceref;
     50 }
     51 
     52 HB_WASM_API (bool_t, face_copy_table) (HB_WASM_EXEC_ENV
     53 			       ptr_d(face_t, face),
     54 			       tag_t table_tag,
     55 			       ptr_d(blob_t, blob))
     56 {
     57  HB_REF2OBJ (face);
     58  HB_PTR_PARAM (blob_t, blob);
     59  if (unlikely (!blob))
     60    return false;
     61 
     62  hb_blob_t *hb_blob = hb_face_reference_table (face, table_tag);
     63 
     64  unsigned length;
     65  const char *hb_data = hb_blob_get_data (hb_blob, &length);
     66 
     67  if (length <= blob->length)
     68  {
     69    char *data = HB_ARRAY_APP2NATIVE (char, blob->data, length);
     70 
     71    if (unlikely (!data))
     72    {
     73      blob->length = 0;
     74      return false;
     75    }
     76 
     77    hb_memcpy (data, hb_data, length);
     78 
     79    return true;
     80  }
     81 
     82  module_free (blob->data);
     83 
     84  blob->length = length;
     85  blob->data = wasm_runtime_module_dup_data (module_inst, hb_data, length);
     86 
     87  hb_blob_destroy (hb_blob);
     88 
     89  if (blob->length && !blob->data)
     90  {
     91    blob->length = 0;
     92    return false;
     93  }
     94 
     95  return true;
     96 }
     97 
     98 HB_WASM_API (unsigned, face_get_upem) (HB_WASM_EXEC_ENV
     99 			       ptr_d(face_t, face))
    100 {
    101  HB_REF2OBJ (face);
    102 
    103  return hb_face_get_upem (face);
    104 }
    105 
    106 
    107 }}
    108 
    109 #endif /* HB_WASM_API_FACE_HH */