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// 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 "vvar.h"
#include "variations.h"
namespace ots {
// -----------------------------------------------------------------------------
// OpenTypeVVAR
// -----------------------------------------------------------------------------
bool OpenTypeVVAR::Parse(const uint8_t* data, size_t length) {
Buffer table(data, length);
uint16_t majorVersion;
uint16_t minorVersion;
uint32_t itemVariationStoreOffset;
uint32_t advanceHeightMappingOffset;
uint32_t tsbMappingOffset;
uint32_t bsbMappingOffset;
uint32_t vOrgMappingOffset;
if (!table.ReadU16(&majorVersion) ||
!table.ReadU16(&minorVersion) ||
!table.ReadU32(&itemVariationStoreOffset) ||
!table.ReadU32(&advanceHeightMappingOffset) ||
!table.ReadU32(&tsbMappingOffset) ||
!table.ReadU32(&bsbMappingOffset) ||
!table.ReadU32(&vOrgMappingOffset)) {
return DropVariations("Failed to read table header");
}
if (majorVersion != 1) {
return DropVariations("Unknown table version");
}
if (itemVariationStoreOffset > length ||
advanceHeightMappingOffset > length ||
tsbMappingOffset > length ||
bsbMappingOffset > length ||
vOrgMappingOffset > length) {
return DropVariations("Invalid subtable offset");
}
if (!ParseItemVariationStore(GetFont(), data + itemVariationStoreOffset,
length - itemVariationStoreOffset)) {
return DropVariations("Failed to parse item variation store");
}
if (advanceHeightMappingOffset) {
if (!ParseDeltaSetIndexMap(GetFont(), data + advanceHeightMappingOffset,
length - advanceHeightMappingOffset)) {
return DropVariations("Failed to parse advance height mappings");
}
}
if (tsbMappingOffset) {
if (!ParseDeltaSetIndexMap(GetFont(), data + tsbMappingOffset,
length - tsbMappingOffset)) {
return DropVariations("Failed to parse TSB mappings");
}
}
if (bsbMappingOffset) {
if (!ParseDeltaSetIndexMap(GetFont(), data + bsbMappingOffset,
length - bsbMappingOffset)) {
return DropVariations("Failed to parse BSB mappings");
}
}
if (vOrgMappingOffset) {
if (!ParseDeltaSetIndexMap(GetFont(), data + vOrgMappingOffset,
length - vOrgMappingOffset)) {
return DropVariations("Failed to parse vOrg mappings");
}
}
this->m_data = data;
this->m_length = length;
return true;
}
bool OpenTypeVVAR::Serialize(OTSStream* out) {
if (!out->Write(this->m_data, this->m_length)) {
return Error("Failed to write VVAR table");
}
return true;
}
} // namespace ots