Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 95 insertions, 0 deletions

diff --git a/gfx/ots/src/vvar.cc b/gfx/ots/src/vvar.cc
new file mode 100644
index 0000000000..b47ea479da
--- /dev/null
+++ b/gfx/ots/src/vvar.cc
@@ -0,0 +1,95 @@
+// 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