Push subsetter code upstream

third_party/sfntly/src/subsetter/font_subsetter.cc

-/*
- * Copyright 2011 Google Inc. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include "third_party/sfntly/src/subsetter/font_subsetter.h"
-
-#include "third_party/sfntly/src/subsetter/subsetter_impl.h"
-
-int SfntlyWrapper::SubsetFont(const char* font_name,
-                              const unsigned char* original_font,
-                              size_t font_size,
-                              const unsigned int* glyph_ids,
-                              size_t glyph_count,
-                              unsigned char** output_buffer) {
-  if (output_buffer == NULL ||
-      original_font == NULL || font_size == 0 ||
-      glyph_ids == NULL || glyph_count == 0) {
-    return 0;
-  }
-
-  sfntly::SubsetterImpl subsetter;
-  if (!subsetter.LoadFont(font_name, original_font, font_size)) {
-    return -1;  // Load error or font not found.
-  }
-
-  return subsetter.SubsetFont(glyph_ids, glyph_count, output_buffer);
-}