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trav90
66 lines
1.4 KiB
C++
66 lines
1.4 KiB
C++
// Copyright (c) 2009 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "cvt.h"
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// cvt - Control Value Table
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// http://www.microsoft.com/typography/otspec/cvt.htm
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#define TABLE_NAME "cvt"
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namespace ots {
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bool ots_cvt_parse(Font *font, const uint8_t *data, size_t length) {
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Buffer table(data, length);
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OpenTypeCVT *cvt = new OpenTypeCVT;
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font->cvt = cvt;
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if (length >= 128 * 1024u) {
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return OTS_FAILURE_MSG("Length (%d) > 120K"); // almost all cvt tables are less than 4k bytes.
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}
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if (length % 2 != 0) {
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return OTS_FAILURE_MSG("Uneven cvt length (%d)", length);
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}
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if (!table.Skip(length)) {
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return OTS_FAILURE_MSG("Length too high");
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}
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cvt->data = data;
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cvt->length = length;
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return true;
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}
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bool ots_cvt_should_serialise(Font *font) {
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if (!font->glyf) {
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return false; // this table is not for CFF fonts.
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}
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return font->cvt != NULL;
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}
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bool ots_cvt_serialise(OTSStream *out, Font *font) {
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const OpenTypeCVT *cvt = font->cvt;
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if (!out->Write(cvt->data, cvt->length)) {
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return OTS_FAILURE_MSG("Failed to write CVT table");
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}
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return true;
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}
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void ots_cvt_reuse(Font *font, Font *other) {
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font->cvt = other->cvt;
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font->cvt_reused = true;
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}
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void ots_cvt_free(Font *font) {
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delete font->cvt;
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}
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} // namespace ots
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#undef TABLE_NAME
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