Updating OTS repo from https://github.com/khaledhosny/ots.git

third_party/ots/src/maxp.cc

+// Copyright (c) 2009 The Chromium 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
+
+#define TABLE_NAME "maxp"
+
+namespace ots {
+
+bool ots_maxp_parse(OpenTypeFile *file, const uint8_t *data, size_t length) {
+  Buffer table(data, length);
+
+  OpenTypeMAXP *maxp = new OpenTypeMAXP;
+  file->maxp = maxp;
+
+  uint32_t version = 0;
+  if (!table.ReadU32(&version)) {
+    return OTS_FAILURE_MSG("Failed to read version of maxp table");
+  }
+
+  if (version >> 16 > 1) {
+    return OTS_FAILURE_MSG("Bad maxp version %d", version);
+  }
+
+  if (!table.ReadU16(&maxp->num_glyphs)) {
+    return OTS_FAILURE_MSG("Failed to read number of glyphs from maxp table");
+  }
+
+  if (!maxp->num_glyphs) {
+    return OTS_FAILURE_MSG("Bad number of glyphs 0 in maxp table");
+  }
+
+  if (version >> 16 == 1) {
+    maxp->version_1 = true;
+    if (!table.ReadU16(&maxp->max_points) ||
+        !table.ReadU16(&maxp->max_contours) ||
+        !table.ReadU16(&maxp->max_c_points) ||
+        !table.ReadU16(&maxp->max_c_contours) ||
+        !table.ReadU16(&maxp->max_zones) ||
+        !table.ReadU16(&maxp->max_t_points) ||
+        !table.ReadU16(&maxp->max_storage) ||
+        !table.ReadU16(&maxp->max_fdefs) ||
+        !table.ReadU16(&maxp->max_idefs) ||
+        !table.ReadU16(&maxp->max_stack) ||
+        !table.ReadU16(&maxp->max_size_glyf_instructions) ||
+        !table.ReadU16(&maxp->max_c_components) ||
+        !table.ReadU16(&maxp->max_c_depth)) {
+      return OTS_FAILURE_MSG("Failed to read maxp table");
+    }
+
+    if (maxp->max_zones == 0) {
+      // workaround for ipa*.ttf Japanese fonts.
+      OTS_WARNING("bad max_zones: %u", maxp->max_zones);
+      maxp->max_zones = 1;
+    } else if (maxp->max_zones == 3) {
+      // workaround for Ecolier-*.ttf fonts.
+      OTS_WARNING("bad max_zones: %u", maxp->max_zones);
+      maxp->max_zones = 2;
+    }
+
+    if ((maxp->max_zones != 1) && (maxp->max_zones != 2)) {
+      return OTS_FAILURE_MSG("Bad max zones %d in maxp", maxp->max_zones);
+    }
+  } else {
+    maxp->version_1 = false;
+  }
+
+  return true;
+}
+
+bool ots_maxp_should_serialise(OpenTypeFile *file) {
+  return file->maxp != NULL;
+}
+
+bool ots_maxp_serialise(OTSStream *out, OpenTypeFile *file) {
+  const OpenTypeMAXP *maxp = file->maxp;
+
+  if (!out->WriteU32(maxp->version_1 ? 0x00010000 : 0x00005000) ||
+      !out->WriteU16(maxp->num_glyphs)) {
+    return OTS_FAILURE_MSG("Failed to write maxp version or number of glyphs");
+  }
+
+  if (!maxp->version_1) return true;
+
+  if (!out->WriteU16(maxp->max_points) ||
+      !out->WriteU16(maxp->max_contours) ||
+      !out->WriteU16(maxp->max_c_points) ||
+      !out->WriteU16(maxp->max_c_contours)) {
+    return OTS_FAILURE_MSG("Failed to write maxp");
+  }
+
+  if (!out->WriteU16(maxp->max_zones) ||
+      !out->WriteU16(maxp->max_t_points) ||
+      !out->WriteU16(maxp->max_storage) ||
+      !out->WriteU16(maxp->max_fdefs) ||
+      !out->WriteU16(maxp->max_idefs) ||
+      !out->WriteU16(maxp->max_stack) ||
+      !out->WriteU16(maxp->max_size_glyf_instructions)) {
+    return OTS_FAILURE_MSG("Failed to write more maxp");
+  }
+
+  if (!out->WriteU16(maxp->max_c_components) ||
+      !out->WriteU16(maxp->max_c_depth)) {
+    return OTS_FAILURE_MSG("Failed to write yet more maxp");
+  }
+
+  return true;
+}
+
+void ots_maxp_free(OpenTypeFile *file) {
+  delete file->maxp;
+}
+
+}  // namespace ots
+
+#undef TABLE_NAME