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