1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/ots/src/cvt.cc Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,58 @@
1.4 +// Copyright (c) 2009 The Chromium Authors. All rights reserved.
1.5 +// Use of this source code is governed by a BSD-style license that can be
1.6 +// found in the LICENSE file.
1.7 +
1.8 +#include "cvt.h"
1.9 +
1.10 +// cvt - Control Value Table
1.11 +// http://www.microsoft.com/typography/otspec/cvt.htm
1.12 +
1.13 +#define TABLE_NAME "cvt"
1.14 +
1.15 +namespace ots {
1.16 +
1.17 +bool ots_cvt_parse(OpenTypeFile *file, const uint8_t *data, size_t length) {
1.18 + Buffer table(data, length);
1.19 +
1.20 + OpenTypeCVT *cvt = new OpenTypeCVT;
1.21 + file->cvt = cvt;
1.22 +
1.23 + if (length >= 128 * 1024u) {
1.24 + return OTS_FAILURE_MSG("Length (%d) > 120K"); // almost all cvt tables are less than 4k bytes.
1.25 + }
1.26 +
1.27 + if (length % 2 != 0) {
1.28 + return OTS_FAILURE_MSG("Uneven cvt length (%d)", length);
1.29 + }
1.30 +
1.31 + if (!table.Skip(length)) {
1.32 + return OTS_FAILURE_MSG("Length too high");
1.33 + }
1.34 +
1.35 + cvt->data = data;
1.36 + cvt->length = length;
1.37 + return true;
1.38 +}
1.39 +
1.40 +bool ots_cvt_should_serialise(OpenTypeFile *file) {
1.41 + if (!file->glyf) {
1.42 + return false; // this table is not for CFF fonts.
1.43 + }
1.44 + return g_transcode_hints && file->cvt;
1.45 +}
1.46 +
1.47 +bool ots_cvt_serialise(OTSStream *out, OpenTypeFile *file) {
1.48 + const OpenTypeCVT *cvt = file->cvt;
1.49 +
1.50 + if (!out->Write(cvt->data, cvt->length)) {
1.51 + return OTS_FAILURE_MSG("Failed to write CVT table");
1.52 + }
1.53 +
1.54 + return true;
1.55 +}
1.56 +
1.57 +void ots_cvt_free(OpenTypeFile *file) {
1.58 + delete file->cvt;
1.59 +}
1.60 +
1.61 +} // namespace ots
