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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/font_factory.h"
#include <string.h>
#include "sfntly/tag.h"
namespace sfntly {
FontFactory::~FontFactory() {
}
CALLER_ATTACH FontFactory* FontFactory::GetInstance() {
FontFactoryPtr instance = new FontFactory();
return instance.Detach();
}
void FontFactory::FingerprintFont(bool fingerprint) {
fingerprint_ = fingerprint;
}
bool FontFactory::FingerprintFont() {
return fingerprint_;
}
void FontFactory::LoadFonts(InputStream* is, FontArray* output) {
assert(output);
PushbackInputStream* pbis = down_cast<PushbackInputStream*>(is);
if (IsCollection(pbis)) {
LoadCollection(pbis, output);
return;
}
FontPtr font;
font.Attach(LoadSingleOTF(pbis));
if (font) {
output->push_back(font);
}
}
void FontFactory::LoadFonts(ByteVector* b, FontArray* output) {
WritableFontDataPtr wfd;
wfd.Attach(WritableFontData::CreateWritableFontData(b));
if (IsCollection(wfd)) {
LoadCollection(wfd, output);
return;
}
FontPtr font;
font.Attach(LoadSingleOTF(wfd));
if (font) {
output->push_back(font);
}
}
void FontFactory::LoadFontsForBuilding(InputStream* is,
FontBuilderArray* output) {
PushbackInputStream* pbis = down_cast<PushbackInputStream*>(is);
if (IsCollection(pbis)) {
LoadCollectionForBuilding(pbis, output);
return;
}
FontBuilderPtr builder;
builder.Attach(LoadSingleOTFForBuilding(pbis));
if (builder) {
output->push_back(builder);
}
}
void FontFactory::LoadFontsForBuilding(ByteVector* b,
FontBuilderArray* output) {
WritableFontDataPtr wfd;
wfd.Attach(WritableFontData::CreateWritableFontData(b));
if (IsCollection(wfd)) {
LoadCollectionForBuilding(wfd, output);
return;
}
FontBuilderPtr builder;
builder.Attach(LoadSingleOTFForBuilding(wfd, 0));
if (builder) {
output->push_back(builder);
}
}
void FontFactory::SerializeFont(Font* font, OutputStream* os) {
font->Serialize(os, &table_ordering_);
}
void FontFactory::SetSerializationTableOrdering(
const IntegerList& table_ordering) {
table_ordering_ = table_ordering;
}
CALLER_ATTACH Font::Builder* FontFactory::NewFontBuilder() {
return Font::Builder::GetOTFBuilder(this);
}
CALLER_ATTACH Font* FontFactory::LoadSingleOTF(InputStream* is) {
FontBuilderPtr builder;
builder.Attach(LoadSingleOTFForBuilding(is));
return builder->Build();
}
CALLER_ATTACH Font* FontFactory::LoadSingleOTF(WritableFontData* wfd) {
FontBuilderPtr builder;
builder.Attach(LoadSingleOTFForBuilding(wfd, 0));
return builder->Build();
}
void FontFactory::LoadCollection(InputStream* is, FontArray* output) {
FontBuilderArray ba;
LoadCollectionForBuilding(is, &ba);
output->reserve(ba.size());
for (FontBuilderArray::iterator builder = ba.begin(), builders_end = ba.end();
builder != builders_end; ++builder) {
FontPtr font;
font.Attach((*builder)->Build());
output->push_back(font);
}
}
void FontFactory::LoadCollection(WritableFontData* wfd, FontArray* output) {
FontBuilderArray builders;
LoadCollectionForBuilding(wfd, &builders);
output->reserve(builders.size());
for (FontBuilderArray::iterator builder = builders.begin(),
builders_end = builders.end();
builder != builders_end; ++builder) {
FontPtr font;
font.Attach((*builder)->Build());
output->push_back(font);
}
}
CALLER_ATTACH
Font::Builder* FontFactory::LoadSingleOTFForBuilding(InputStream* is) {
// UNIMPLEMENTED: SHA-1 hash checking via Java DigestStream
Font::Builder* builder = Font::Builder::GetOTFBuilder(this, is);
// UNIMPLEMENTED: setDigest
return builder;
}
CALLER_ATTACH Font::Builder*
FontFactory::LoadSingleOTFForBuilding(WritableFontData* wfd,
int32_t offset_to_offset_table) {
// UNIMPLEMENTED: SHA-1 hash checking via Java DigestStream
Font::Builder* builder =
Font::Builder::GetOTFBuilder(this, wfd, offset_to_offset_table);
// UNIMPLEMENTED: setDigest
return builder;
}
void FontFactory::LoadCollectionForBuilding(InputStream* is,
FontBuilderArray* builders) {
assert(is);
assert(builders);
WritableFontDataPtr wfd;
wfd.Attach(WritableFontData::CreateWritableFontData(is->Available()));
wfd->CopyFrom(is);
LoadCollectionForBuilding(wfd, builders);
}
void FontFactory::LoadCollectionForBuilding(WritableFontData* wfd,
FontBuilderArray* builders) {
int32_t ttc_tag = wfd->ReadULongAsInt(Offset::kTTCTag);
UNREFERENCED_PARAMETER(ttc_tag);
int32_t version = wfd->ReadFixed(Offset::kVersion);
UNREFERENCED_PARAMETER(version);
int32_t num_fonts = wfd->ReadULongAsInt(Offset::kNumFonts);
builders->reserve(num_fonts);
int32_t offset_table_offset = Offset::kOffsetTable;
for (int32_t font_number = 0;
font_number < num_fonts;
font_number++, offset_table_offset += DataSize::kULONG) {
int32_t offset = wfd->ReadULongAsInt(offset_table_offset);
FontBuilderPtr builder;
builder.Attach(LoadSingleOTFForBuilding(wfd, offset));
builders->push_back(builder);
}
}
bool FontFactory::IsCollection(PushbackInputStream* pbis) {
ByteVector tag(4);
pbis->Read(&tag);
pbis->Unread(&tag);
return Tag::ttcf == GenerateTag(tag[0], tag[1], tag[2], tag[3]);
}
bool FontFactory::IsCollection(ReadableFontData* rfd) {
ByteVector tag(4);
rfd->ReadBytes(0, &(tag[0]), 0, tag.size());
return Tag::ttcf ==
GenerateTag(tag[0], tag[1], tag[2], tag[3]);
}
FontFactory::FontFactory()
: fingerprint_(false) {
}
} // namespace sfntly
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