The Tor Browser: gfx/ots/src/vhea.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) 2011 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 "vhea.h"

     7 #include "gsub.h"

     8 #include "head.h"

     9 #include "maxp.h"

    11 // vhea - Vertical Header Table

    12 // http://www.microsoft.com/typography/otspec/vhea.htm

    14 #define TABLE_NAME "vhea"

    16 namespace ots {

    18 bool ots_vhea_parse(OpenTypeFile *file, const uint8_t *data, size_t length) {

    19   Buffer table(data, length);

    20   OpenTypeVHEA *vhea = new OpenTypeVHEA;

    21   file->vhea = vhea;

    23   if (!table.ReadU32(&vhea->header.version)) {

    24     return OTS_FAILURE_MSG("Failed to read version");

    25   }

    26   if (vhea->header.version != 0x00010000 &&

    27       vhea->header.version != 0x00011000) {

    28     return OTS_FAILURE_MSG("Bad vhea version %x", vhea->header.version);

    29   }

    31   if (!ParseMetricsHeader(file, &table, &vhea->header)) {

    32     return OTS_FAILURE_MSG("Failed to parse metrics in vhea");

    33   }

    35   return true;

    36 }

    38 bool ots_vhea_should_serialise(OpenTypeFile *file) {

    39   // vhea should'nt serialise when vmtx doesn't exist.

    40   // Firefox developer pointed out that vhea/vmtx should serialise iff GSUB is

    41   // preserved. See http://crbug.com/77386

    42   return file->vhea != NULL && file->vmtx != NULL &&

    43       ots_gsub_should_serialise(file);

    44 }

    46 bool ots_vhea_serialise(OTSStream *out, OpenTypeFile *file) {

    47   if (!SerialiseMetricsHeader(file, out, &file->vhea->header)) {

    48     return OTS_FAILURE_MSG("Failed to write vhea metrics");

    49   }

    50   return true;

    51 }

    53 void ots_vhea_free(OpenTypeFile *file) {

    54   delete file->vhea;

    55 }

    57 }  // namespace ots

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