1 files changed, 103 insertions, 0 deletions
diff --git a/gfx/ots/src/maxp.cc b/gfx/ots/src/maxp.cc
new file mode 100644
index 0000000000..232e4a9889
--- /dev/null
+++ b/gfx/ots/src/maxp.cc
@@ -0,0 +1,103 @@
+// Copyright (c) 2009-2017 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 "maxp.h"
+
+// maxp - Maximum Profile
+// http://www.microsoft.com/typography/otspec/maxp.htm
+
+namespace ots {
+
+bool OpenTypeMAXP::Parse(const uint8_t *data, size_t length) {
+  Buffer table(data, length);
+
+  uint32_t version = 0;
+  if (!table.ReadU32(&version)) {
+    return Error("Failed to read table version");
+  }
+
+  if (version >> 16 > 1) {
+    return Error("Unsupported table version 0x%x", version);
+  }
+
+  if (!table.ReadU16(&this->num_glyphs)) {
+    return Error("Failed to read numGlyphs");
+  }
+
+  if (!this->num_glyphs) {
+    return Error("numGlyphs is 0");
+  }
+
+  if (version >> 16 == 1) {
+    this->version_1 = true;
+    if (!table.ReadU16(&this->max_points) ||
+        !table.ReadU16(&this->max_contours) ||
+        !table.ReadU16(&this->max_c_points) ||
+        !table.ReadU16(&this->max_c_contours) ||
+        !table.ReadU16(&this->max_zones) ||
+        !table.ReadU16(&this->max_t_points) ||
+        !table.ReadU16(&this->max_storage) ||
+        !table.ReadU16(&this->max_fdefs) ||
+        !table.ReadU16(&this->max_idefs) ||
+        !table.ReadU16(&this->max_stack) ||
+        !table.ReadU16(&this->max_size_glyf_instructions) ||
+        !table.ReadU16(&this->max_c_components) ||
+        !table.ReadU16(&this->max_c_depth)) {
+      return Error("Failed to read version 1 table data");
+    }
+
+    if (this->max_zones == 0) {
+      // workaround for ipa*.ttf Japanese fonts.
+      Warning("Bad maxZones: %u", this->max_zones);
+      this->max_zones = 1;
+    } else if (this->max_zones == 3) {
+      // workaround for Ecolier-*.ttf fonts.
+      Warning("Bad maxZones: %u", this->max_zones);
+      this->max_zones = 2;
+    }
+
+    if ((this->max_zones != 1) && (this->max_zones != 2)) {
+      return Error("Bad maxZones: %u", this->max_zones);
+    }
+  } else {
+    this->version_1 = false;
+  }
+
+  return true;
+}
+
+bool OpenTypeMAXP::Serialize(OTSStream *out) {
+  if (!out->WriteU32(this->version_1 ? 0x00010000 : 0x00005000) ||
+      !out->WriteU16(this->num_glyphs)) {
+    return Error("Failed to write version or numGlyphs");
+  }
+
+  if (!this->version_1) return true;
+
+  if (!out->WriteU16(this->max_points) ||
+      !out->WriteU16(this->max_contours) ||
+      !out->WriteU16(this->max_c_points) ||
+      !out->WriteU16(this->max_c_contours)) {
+    return Error("Failed to write maxp");
+  }
+
+  if (!out->WriteU16(this->max_zones) ||
+      !out->WriteU16(this->max_t_points) ||
+      !out->WriteU16(this->max_storage) ||
+      !out->WriteU16(this->max_fdefs) ||
+      !out->WriteU16(this->max_idefs) ||
+      !out->WriteU16(this->max_stack) ||
+      !out->WriteU16(this->max_size_glyf_instructions)) {
+    return Error("Failed to write more maxp");
+  }
+
+  if (!out->WriteU16(this->max_c_components) ||
+      !out->WriteU16(this->max_c_depth)) {
+    return Error("Failed to write yet more maxp");
+  }
+
+  return true;
+}
+
+}  // namespace ots