The Tor Browser: gfx/ots/src/prep.cc@6474c204b198

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     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.

     5 #include "prep.h"

     7 // prep - Control Value Program

     8 // http://www.microsoft.com/typography/otspec/prep.htm

    10 #define TABLE_NAME "prep"

    12 namespace ots {

    14 bool ots_prep_parse(OpenTypeFile *file, const uint8_t *data, size_t length) {

    15   Buffer table(data, length);

    17   OpenTypePREP *prep = new OpenTypePREP;

    18   file->prep = prep;

    20   if (length >= 128 * 1024u) {

    21     return OTS_FAILURE_MSG("table length %ld > 120K", length);  // almost all prep tables are less than 9k bytes.

    22   }

    24   if (!table.Skip(length)) {

    25     return OTS_FAILURE_MSG("Failed to read table of length %ld", length);

    26   }

    28   prep->data = data;

    29   prep->length = length;

    30   return true;

    31 }

    33 bool ots_prep_should_serialise(OpenTypeFile *file) {

    34   if (!file->glyf) return false;  // this table is not for CFF fonts.

    35   return g_transcode_hints && file->prep;

    36 }

    38 bool ots_prep_serialise(OTSStream *out, OpenTypeFile *file) {

    39   const OpenTypePREP *prep = file->prep;

    41   if (!out->Write(prep->data, prep->length)) {

    42     return OTS_FAILURE_MSG("Failed to write table length");

    43   }

    45   return true;

    46 }

    48 void ots_prep_free(OpenTypeFile *file) {

    49   delete file->prep;

    50 }

    52 }  // namespace ots

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