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

third_party/ots/src/hdmx.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 "hdmx.h"
-#include "head.h"
-#include "maxp.h"
-
-// hdmx - Horizontal Device Metrics
-// http://www.microsoft.com/typography/otspec/hdmx.htm
-
-#define TABLE_NAME "hdmx"
-
-#define DROP_THIS_TABLE(...) \
-  do { \
-    OTS_FAILURE_MSG_(file, TABLE_NAME ": " __VA_ARGS__); \
-    OTS_FAILURE_MSG("Table discarded"); \
-    delete file->hdmx; \
-    file->hdmx = 0; \
-  } while (0)
-
-namespace ots {
-
-bool ots_hdmx_parse(OpenTypeFile *file, const uint8_t *data, size_t length) {
-  Buffer table(data, length);
-  file->hdmx = new OpenTypeHDMX;
-  OpenTypeHDMX * const hdmx = file->hdmx;
-
-  if (!file->head || !file->maxp) {
-    return OTS_FAILURE_MSG("Missing maxp or head tables in font, needed by hdmx");
-  }
-
-  if ((file->head->flags & 0x14) == 0) {
-    // http://www.microsoft.com/typography/otspec/recom.htm
-    DROP_THIS_TABLE("the table should not be present when bit 2 and 4 of the "
-                    "head->flags are not set");
-    return true;
-  }
-
-  int16_t num_recs;
-  if (!table.ReadU16(&hdmx->version) ||
-      !table.ReadS16(&num_recs) ||
-      !table.ReadS32(&hdmx->size_device_record)) {
-    return OTS_FAILURE_MSG("Failed to read hdmx header");
-  }
-  if (hdmx->version != 0) {
-    DROP_THIS_TABLE("bad version: %u", hdmx->version);
-    return true;
-  }
-  if (num_recs <= 0) {
-    DROP_THIS_TABLE("bad num_recs: %d", num_recs);
-    return true;
-  }
-  const int32_t actual_size_device_record = file->maxp->num_glyphs + 2;
-  if (hdmx->size_device_record < actual_size_device_record) {
-    DROP_THIS_TABLE("bad hdmx->size_device_record: %d", hdmx->size_device_record);
-    return true;
-  }
-
-  hdmx->pad_len = hdmx->size_device_record - actual_size_device_record;
-  if (hdmx->pad_len > 3) {
-    return OTS_FAILURE_MSG("Bad padding %d", hdmx->pad_len);
-  }
-
-  uint8_t last_pixel_size = 0;
-  hdmx->records.reserve(num_recs);
-  for (int i = 0; i < num_recs; ++i) {
-    OpenTypeHDMXDeviceRecord rec;
-
-    if (!table.ReadU8(&rec.pixel_size) ||
-        !table.ReadU8(&rec.max_width)) {
-      return OTS_FAILURE_MSG("Failed to read hdmx record %d", i);
-    }
-    if ((i != 0) &&
-        (rec.pixel_size <= last_pixel_size)) {
-      DROP_THIS_TABLE("records are not sorted");
-      return true;
-    }
-    last_pixel_size = rec.pixel_size;
-
-    rec.widths.reserve(file->maxp->num_glyphs);
-    for (unsigned j = 0; j < file->maxp->num_glyphs; ++j) {
-      uint8_t width;
-      if (!table.ReadU8(&width)) {
-        return OTS_FAILURE_MSG("Failed to read glyph width %d in record %d", j, i);
-      }
-      rec.widths.push_back(width);
-    }
-
-    if ((hdmx->pad_len > 0) &&
-        !table.Skip(hdmx->pad_len)) {
-      return OTS_FAILURE_MSG("Failed to skip padding %d", hdmx->pad_len);
-    }
-
-    hdmx->records.push_back(rec);
-  }
-
-  return true;
-}
-
-bool ots_hdmx_should_serialise(OpenTypeFile *file) {
-  if (!file->hdmx) return false;
-  if (!file->glyf) return false;  // this table is not for CFF fonts.
-  return true;
-}
-
-bool ots_hdmx_serialise(OTSStream *out, OpenTypeFile *file) {
-  OpenTypeHDMX * const hdmx = file->hdmx;
-
-  const int16_t num_recs = static_cast<int16_t>(hdmx->records.size());
-  if (hdmx->records.size() >
-          static_cast<size_t>(std::numeric_limits<int16_t>::max()) ||
-      !out->WriteU16(hdmx->version) ||
-      !out->WriteS16(num_recs) ||
-      !out->WriteS32(hdmx->size_device_record)) {
-    return OTS_FAILURE_MSG("Failed to write hdmx header");
-  }
-
-  for (int16_t i = 0; i < num_recs; ++i) {
-    const OpenTypeHDMXDeviceRecord& rec = hdmx->records[i];
-    if (!out->Write(&rec.pixel_size, 1) ||
-        !out->Write(&rec.max_width, 1) ||
-        !out->Write(&rec.widths[0], rec.widths.size())) {
-      return OTS_FAILURE_MSG("Failed to write hdmx record %d", i);
-    }
-    if ((hdmx->pad_len > 0) &&
-        !out->Write((const uint8_t *)"\x00\x00\x00", hdmx->pad_len)) {
-      return OTS_FAILURE_MSG("Failed to write hdmx padding of length %d", hdmx->pad_len);
-    }
-  }
-
-  return true;
-}
-
-void ots_hdmx_free(OpenTypeFile *file) {
-  delete file->hdmx;
-}
-
-}  // namespace ots
-
-#undef TABLE_NAME
-#undef DROP_THIS_TABLE