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/*
* Copyright 2011 Google Inc. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "sfntly/table/bitmap/index_sub_table_format3.h"
#include "sfntly/table/bitmap/eblc_table.h"
namespace sfntly {
// static
int32_t IndexSubTableFormat3::GetDataLength(ReadableFontData* data,
int32_t offset,
int32_t first,
int32_t last) {
UNREFERENCED_PARAMETER(data);
UNREFERENCED_PARAMETER(offset);
return (last - first + 1 + 1) * DataSize::kUSHORT;
}
IndexSubTableFormat3::IndexSubTableFormat3(ReadableFontData* data,
int32_t first,
int32_t last)
: IndexSubTable(data, first, last) {
}
IndexSubTableFormat3::~IndexSubTableFormat3() {
}
int32_t IndexSubTableFormat3::NumGlyphs() {
return last_glyph_index() - first_glyph_index() + 1;
}
int32_t IndexSubTableFormat3::GlyphOffset(int32_t glyph_id) {
if (CheckGlyphRange(glyph_id)) {
return Loca(glyph_id);
}
return -1;
}
int32_t IndexSubTableFormat3::GlyphLength(int32_t glyph_id) {
if (CheckGlyphRange(glyph_id)) {
return Loca(glyph_id + 1) - Loca(glyph_id);
}
return -1;
}
int32_t IndexSubTableFormat3::Loca(int32_t loca_index) {
int32_t read_offset =
data_->ReadUShort(EblcTable::Offset::kIndexSubTable3_offsetArray +
(loca_index - first_glyph_index()) * DataSize::kUSHORT);
return image_data_offset() + read_offset;
}
} // namespace sfntly
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