122 lines
4.3 KiB
C++
122 lines
4.3 KiB
C++
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/*
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* Copyright © 2018 Adobe Systems Incorporated.
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*
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* This is part of HarfBuzz, a text shaping library.
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*
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* Permission is hereby granted, without written agreement and without
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* license or royalty fees, to use, copy, modify, and distribute this
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* software and its documentation for any purpose, provided that the
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* above copyright notice and the following two paragraphs appear in
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* all copies of this software.
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*
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* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
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* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
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* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
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* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*
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* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
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* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
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* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
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* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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*
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* Adobe Author(s): Michiharu Ariza
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*/
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#include "hb-open-type-private.hh"
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#include "hb-ot-cff2-table.hh"
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#include "hb-set.h"
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#include "hb-subset-cff2.hh"
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#include "hb-subset-plan.hh"
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static bool
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_calculate_cff2_prime_size (const OT::cff2::accelerator_t &cff2,
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hb_vector_t<hb_codepoint_t> &glyph_ids,
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hb_bool_t drop_hints,
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unsigned int *cff2_size /* OUT */,
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hb_vector_t<unsigned int> *instruction_ranges /* OUT */)
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{
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// XXX: TODO
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*cff2_size = 0;
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return true;
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}
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static bool
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_write_cff2_prime (hb_subset_plan_t *plan,
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const OT::cff2::accelerator_t &cff2,
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const char *cff2_data,
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hb_vector_t<unsigned int> &instruction_ranges,
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unsigned int cff2_prime_size,
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char *cff2_prime_data /* OUT */)
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{
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// XXX: TODO
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return true;
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}
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static bool
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_hb_subset_cff2 (const OT::cff2::accelerator_t &cff2,
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const char *cff2_data,
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hb_subset_plan_t *plan,
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hb_blob_t **cff2_prime /* OUT */)
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{
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hb_vector_t<hb_codepoint_t> &glyphs_to_retain = plan->glyphs;
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unsigned int cff2_prime_size;
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hb_vector_t<unsigned int> instruction_ranges;
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instruction_ranges.init();
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if (unlikely (!_calculate_cff2_prime_size (cff2,
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glyphs_to_retain,
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plan->drop_hints,
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&cff2_prime_size,
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&instruction_ranges))) {
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instruction_ranges.fini();
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return false;
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}
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char *cff2_prime_data = (char *) calloc (1, cff2_prime_size);
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if (unlikely (!_write_cff2_prime (plan, cff2, cff2_data,
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instruction_ranges,
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cff2_prime_size, cff2_prime_data))) {
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free (cff2_prime_data);
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instruction_ranges.fini();
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return false;
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}
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instruction_ranges.fini();
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*cff2_prime = hb_blob_create (cff2_prime_data,
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cff2_prime_size,
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HB_MEMORY_MODE_READONLY,
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cff2_prime_data,
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free);
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// XXX: TODO
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return true;
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}
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/**
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* hb_subset_cff2:
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* Subsets the CFF2 table according to a provided plan.
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*
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* Return value: subsetted cff2 table.
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**/
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bool
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hb_subset_cff2 (hb_subset_plan_t *plan,
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hb_blob_t **cff2_prime /* OUT */)
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{
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hb_blob_t *cff2_blob = OT::Sanitizer<OT::cff2>().sanitize (plan->source->reference_table (HB_OT_TAG_cff2));
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const char *cff2_data = hb_blob_get_data(cff2_blob, nullptr);
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OT::cff2::accelerator_t cff2;
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cff2.init(plan->source);
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bool result = _hb_subset_cff2 (cff2,
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cff2_data,
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plan,
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cff2_prime);
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hb_blob_destroy (cff2_blob);
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cff2.fini();
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return result;
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}
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