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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/bitmap_size_table.h"
#include "sfntly/table/bitmap/eblc_table.h"
namespace sfntly {
BitmapSizeTable::BitmapSizeTable(ReadableFontData* data,
ReadableFontData* master_data)
: SubTable(data) {
master_data_ = master_data;
}
BitmapSizeTable::~BitmapSizeTable() {
}
int32_t BitmapSizeTable::IndexSubTableArrayOffset() {
return data_->ReadULongAsInt(
EblcTable::Offset::kBitmapSizeTable_indexSubTableArrayOffset);
}
int32_t BitmapSizeTable::IndexTableSize() {
return data_->ReadULongAsInt(
EblcTable::Offset::kBitmapSizeTable_indexTableSize);
}
int32_t BitmapSizeTable::NumberOfIndexSubTables() {
return data_->ReadULongAsInt(
EblcTable::Offset::kBitmapSizeTable_numberOfIndexSubTables);
}
int32_t BitmapSizeTable::ColorRef() {
return data_->ReadULongAsInt(EblcTable::Offset::kBitmapSizeTable_colorRef);
}
int32_t BitmapSizeTable::StartGlyphIndex() {
return data_->ReadUShort(EblcTable::Offset::kBitmapSizeTable_startGlyphIndex);
}
int32_t BitmapSizeTable::EndGlyphIndex() {
return data_->ReadUShort(EblcTable::Offset::kBitmapSizeTable_endGlyphIndex);
}
int32_t BitmapSizeTable::PpemX() {
return data_->ReadByte(EblcTable::Offset::kBitmapSizeTable_ppemX);
}
int32_t BitmapSizeTable::PpemY() {
return data_->ReadByte(EblcTable::Offset::kBitmapSizeTable_ppemY);
}
int32_t BitmapSizeTable::BitDepth() {
return data_->ReadByte(EblcTable::Offset::kBitmapSizeTable_bitDepth);
}
int32_t BitmapSizeTable::FlagsAsInt() {
return data_->ReadChar(EblcTable::Offset::kBitmapSizeTable_flags);
}
IndexSubTable* BitmapSizeTable::GetIndexSubTable(int32_t index) {
IndexSubTableList* subtable_list = GetIndexSubTableList();
if (index >= 0 && (size_t)index < subtable_list->size()) {
return (*subtable_list)[index];
}
return NULL;
}
int32_t BitmapSizeTable::GlyphOffset(int32_t glyph_id) {
IndexSubTable* subtable = SearchIndexSubTables(glyph_id);
if (subtable == NULL) {
return -1;
}
return subtable->GlyphOffset(glyph_id);
}
int32_t BitmapSizeTable::GlyphLength(int32_t glyph_id) {
IndexSubTable* subtable = SearchIndexSubTables(glyph_id);
if (subtable == NULL) {
return -1;
}
return subtable->GlyphLength(glyph_id);
}
int32_t BitmapSizeTable::GlyphFormat(int32_t glyph_id) {
IndexSubTable* subtable = SearchIndexSubTables(glyph_id);
if (subtable == NULL) {
return -1;
}
return subtable->image_format();
}
IndexSubTable* BitmapSizeTable::SearchIndexSubTables(int32_t glyph_id) {
IndexSubTableList* subtable_list = GetIndexSubTableList();
int32_t index = 0;
int32_t bottom = 0;
int32_t top = subtable_list->size();
while (top != bottom) {
index = (top + bottom) / 2;
IndexSubTable* subtable = (*subtable_list)[index];
if (glyph_id < subtable->first_glyph_index()) {
// Location beow current location
top = index;
} else {
if (glyph_id <= subtable->last_glyph_index()) {
return subtable;
} else {
bottom = index + 1;
}
}
}
return NULL;
}
CALLER_ATTACH
IndexSubTable* BitmapSizeTable::CreateIndexSubTable(int32_t index) {
return IndexSubTable::CreateIndexSubTable(master_data_,
IndexSubTableArrayOffset(),
index);
}
IndexSubTableList* BitmapSizeTable::GetIndexSubTableList() {
if (atomic_subtables.empty()) {
for (int32_t i = 0; i < NumberOfIndexSubTables(); ++i) {
IndexSubTablePtr table;
table.Attach(CreateIndexSubTable(i));
atomic_subtables.push_back(table);
}
}
return &atomic_subtables;
}
} // namespace sfntly
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