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// Copyright (c) 2009 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "prep.h"
// prep - Control Value Program
// http://www.microsoft.com/typography/otspec/prep.htm
#define TABLE_NAME "prep"
namespace ots {
bool ots_prep_parse(Font *font, const uint8_t *data, size_t length) {
Buffer table(data, length);
OpenTypePREP *prep = new OpenTypePREP;
font->prep = prep;
if (length >= 128 * 1024u) {
return OTS_FAILURE_MSG("table length %ld > 120K", length); // almost all prep tables are less than 9k bytes.
}
if (!table.Skip(length)) {
return OTS_FAILURE_MSG("Failed to read table of length %ld", length);
}
prep->data = data;
prep->length = length;
return true;
}
bool ots_prep_should_serialise(Font *font) {
if (!font->glyf) return false; // this table is not for CFF fonts.
return font->prep != NULL;
}
bool ots_prep_serialise(OTSStream *out, Font *font) {
const OpenTypePREP *prep = font->prep;
if (!out->Write(prep->data, prep->length)) {
return OTS_FAILURE_MSG("Failed to write table length");
}
return true;
}
void ots_prep_reuse(Font *font, Font *other) {
font->prep = other->prep;
font->prep_reused = true;
}
void ots_prep_free(Font *font) {
delete font->prep;
}
} // namespace ots
#undef TABLE_NAME
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