81 lines
2.6 KiB
C++
81 lines
2.6 KiB
C++
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/*
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* Copyright © 2022 Google, Inc.
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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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* Google Author(s): Garret Rieger
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*/
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#include "graph.hh"
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#include "../OT/Layout/Common/Coverage.hh"
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#ifndef GRAPH_COVERAGE_GRAPH_HH
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#define GRAPH_COVERAGE_GRAPH_HH
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namespace graph {
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struct CoverageFormat1 : public OT::Layout::Common::CoverageFormat1_3<SmallTypes>
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{
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bool sanitize (graph_t::vertex_t& vertex) const
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{
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int64_t vertex_len = vertex.obj.tail - vertex.obj.head;
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constexpr unsigned min_size = OT::Layout::Common::CoverageFormat1_3<SmallTypes>::min_size;
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if (vertex_len < min_size) return false;
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return vertex_len >= min_size + glyphArray.get_size () - glyphArray.len.get_size ();
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}
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};
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struct CoverageFormat2 : public OT::Layout::Common::CoverageFormat2_4<SmallTypes>
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{
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bool sanitize (graph_t::vertex_t& vertex) const
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{
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int64_t vertex_len = vertex.obj.tail - vertex.obj.head;
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constexpr unsigned min_size = OT::Layout::Common::CoverageFormat2_4<SmallTypes>::min_size;
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if (vertex_len < min_size) return false;
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return vertex_len >= min_size + rangeRecord.get_size () - rangeRecord.len.get_size ();
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}
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};
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struct Coverage : public OT::Layout::Common::Coverage
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{
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bool sanitize (graph_t::vertex_t& vertex) const
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{
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int64_t vertex_len = vertex.obj.tail - vertex.obj.head;
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if (vertex_len < OT::Layout::Common::Coverage::min_size) return false;
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switch (u.format)
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{
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case 1: return ((CoverageFormat1*)this)->sanitize (vertex);
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case 2: return ((CoverageFormat2*)this)->sanitize (vertex);
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#ifndef HB_NO_BORING_EXPANSION
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// Not currently supported
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case 3:
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case 4:
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#endif
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default: return false;
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}
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}
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};
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}
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#endif // GRAPH_COVERAGE_GRAPH_HH
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