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// 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 "fpgm.h"

// fpgm - Font Program
// http://www.microsoft.com/typography/otspec/fpgm.htm

#define TABLE_NAME "fpgm"

namespace ots {

bool ots_fpgm_parse(Font *font, const uint8_t *data, size_t length) {
  Buffer table(data, length);

  OpenTypeFPGM *fpgm = new OpenTypeFPGM;
  font->fpgm = fpgm;

  if (length >= 128 * 1024u) {
    return OTS_FAILURE_MSG("length (%ld) > 120", length);  // almost all fpgm tables are less than 5k bytes.
  }

  if (!table.Skip(length)) {
    return OTS_FAILURE_MSG("Bad fpgm length");
  }

  fpgm->data = data;
  fpgm->length = length;
  return true;
}

bool ots_fpgm_should_serialise(Font *font) {
  if (!font->glyf) return false;  // this table is not for CFF fonts.
  return font->fpgm != NULL;
}

bool ots_fpgm_serialise(OTSStream *out, Font *font) {
  const OpenTypeFPGM *fpgm = font->fpgm;

  if (!out->Write(fpgm->data, fpgm->length)) {
    return OTS_FAILURE_MSG("Failed to write fpgm");
  }

  return true;
}

void ots_fpgm_reuse(Font *font, Font *other) {
  font->fpgm = other->fpgm;
  font->fpgm_reused = true;
}

void ots_fpgm_free(Font *font) {
  delete font->fpgm;
}

}  // namespace ots

#undef TABLE_NAME