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author | wolfbeast <mcwerewolf@wolfbeast.com> | 2019-11-14 10:07:01 +0100 |
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committer | wolfbeast <mcwerewolf@wolfbeast.com> | 2019-11-14 10:07:01 +0100 |
commit | 0f8691a48869932cd3de5195f5211c25e4691b21 (patch) | |
tree | 829675d64c457be0b447dfbcf9534cc22f83d392 /gfx/ots/src/hvar.cc | |
parent | 36975f3865948f3faa959fe386e58b22783bd379 (diff) | |
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Issue #1288 - Part 4: Update the OpenType Sanitizer component to 8.0.0
Diffstat (limited to 'gfx/ots/src/hvar.cc')
-rw-r--r-- | gfx/ots/src/hvar.cc | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/gfx/ots/src/hvar.cc b/gfx/ots/src/hvar.cc new file mode 100644 index 000000000..2bcea8680 --- /dev/null +++ b/gfx/ots/src/hvar.cc @@ -0,0 +1,85 @@ +// Copyright (c) 2018 The OTS Authors. All rights reserved. +// Use of this source code is governed by a BSD-style license that can be +// found in the LICENSE file. + +#include "hvar.h" + +#include "variations.h" + +namespace ots { + +// ----------------------------------------------------------------------------- +// OpenTypeHVAR +// ----------------------------------------------------------------------------- + +bool OpenTypeHVAR::Parse(const uint8_t* data, size_t length) { + Buffer table(data, length); + + uint16_t majorVersion; + uint16_t minorVersion; + uint32_t itemVariationStoreOffset; + uint32_t advanceWidthMappingOffset; + uint32_t lsbMappingOffset; + uint32_t rsbMappingOffset; + + if (!table.ReadU16(&majorVersion) || + !table.ReadU16(&minorVersion) || + !table.ReadU32(&itemVariationStoreOffset) || + !table.ReadU32(&advanceWidthMappingOffset) || + !table.ReadU32(&lsbMappingOffset) || + !table.ReadU32(&rsbMappingOffset)) { + return DropVariations("Failed to read table header"); + } + + if (majorVersion != 1) { + return DropVariations("Unknown table version"); + } + + if (itemVariationStoreOffset > length || + advanceWidthMappingOffset > length || + lsbMappingOffset > length || + rsbMappingOffset > length) { + return DropVariations("Invalid subtable offset"); + } + + if (!ParseItemVariationStore(GetFont(), data + itemVariationStoreOffset, + length - itemVariationStoreOffset)) { + return DropVariations("Failed to parse item variation store"); + } + + if (advanceWidthMappingOffset) { + if (!ParseDeltaSetIndexMap(GetFont(), data + advanceWidthMappingOffset, + length - advanceWidthMappingOffset)) { + return DropVariations("Failed to parse advance width mappings"); + } + } + + if (lsbMappingOffset) { + if (!ParseDeltaSetIndexMap(GetFont(), data + lsbMappingOffset, + length - lsbMappingOffset)) { + return DropVariations("Failed to parse LSB mappings"); + } + } + + if (rsbMappingOffset) { + if (!ParseDeltaSetIndexMap(GetFont(), data + rsbMappingOffset, + length - rsbMappingOffset)) { + return DropVariations("Failed to parse RSB mappings"); + } + } + + this->m_data = data; + this->m_length = length; + + return true; +} + +bool OpenTypeHVAR::Serialize(OTSStream* out) { + if (!out->Write(this->m_data, this->m_length)) { + return Error("Failed to write HVAR table"); + } + + return true; +} + +} // namespace ots |