Line data    Source code

       1             : // Copyright (c) 2009 The Chromium Authors. All rights reserved.
       2             : // Use of this source code is governed by a BSD-style license that can be
       3             : // found in the LICENSE file.
       4             : 
       5             : #include "prep.h"
       6             : 
       7             : // prep - Control Value Program
       8             : // http://www.microsoft.com/typography/otspec/prep.htm
       9             : 
      10             : #define TABLE_NAME "prep"
      11             : 
      12             : namespace ots {
      13             : 
      14           0 : bool ots_prep_parse(Font *font, const uint8_t *data, size_t length) {
      15           0 :   Buffer table(data, length);
      16             : 
      17           0 :   OpenTypePREP *prep = new OpenTypePREP;
      18           0 :   font->prep = prep;
      19             : 
      20           0 :   if (length >= 128 * 1024u) {
      21           0 :     return OTS_FAILURE_MSG("table length %ld > 120K", length);  // almost all prep tables are less than 9k bytes.
      22             :   }
      23             : 
      24           0 :   if (!table.Skip(length)) {
      25           0 :     return OTS_FAILURE_MSG("Failed to read table of length %ld", length);
      26             :   }
      27             : 
      28           0 :   prep->data = data;
      29           0 :   prep->length = length;
      30           0 :   return true;
      31             : }
      32             : 
      33           0 : bool ots_prep_should_serialise(Font *font) {
      34           0 :   if (!font->glyf) return false;  // this table is not for CFF fonts.
      35           0 :   return font->prep != NULL;
      36             : }
      37             : 
      38           0 : bool ots_prep_serialise(OTSStream *out, Font *font) {
      39           0 :   const OpenTypePREP *prep = font->prep;
      40             : 
      41           0 :   if (!out->Write(prep->data, prep->length)) {
      42           0 :     return OTS_FAILURE_MSG("Failed to write table length");
      43             :   }
      44             : 
      45           0 :   return true;
      46             : }
      47             : 
      48           0 : void ots_prep_reuse(Font *font, Font *other) {
      49           0 :   font->prep = other->prep;
      50           0 :   font->prep_reused = true;
      51           0 : }
      52             : 
      53           0 : void ots_prep_free(Font *font) {
      54           0 :   delete font->prep;
      55           0 : }
      56             : 
      57             : }  // namespace ots
      58             : 
      59             : #undef TABLE_NAME