| /* |
| * Copyright 2012 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "SkFontDescriptor.h" |
| #include "SkStream.h" |
| #include "SkData.h" |
| |
| enum { |
| // these must match the sfnt 'name' enums |
| kFontFamilyName = 0x01, |
| kFullName = 0x04, |
| kPostscriptName = 0x06, |
| |
| // These count backwards from 0xFF, so as not to collide with the SFNT |
| // defines for names in its 'name' table. |
| kFontAxes = 0xFC, |
| kFontIndex = 0xFD, |
| kFontFileName = 0xFE, // Remove when MIN_PICTURE_VERSION > 41 |
| kSentinel = 0xFF, |
| }; |
| |
| SkFontDescriptor::SkFontDescriptor(SkTypeface::Style style) : fStyle(style) { } |
| |
| static void read_string(SkStream* stream, SkString* string) { |
| const uint32_t length = SkToU32(stream->readPackedUInt()); |
| if (length > 0) { |
| string->resize(length); |
| stream->read(string->writable_str(), length); |
| } |
| } |
| |
| // Remove when MIN_PICTURE_VERSION > 41 |
| static void skip_string(SkStream* stream) { |
| const uint32_t length = SkToU32(stream->readPackedUInt()); |
| if (length > 0) { |
| stream->skip(length); |
| } |
| } |
| |
| static void write_string(SkWStream* stream, const SkString& string, uint32_t id) { |
| if (!string.isEmpty()) { |
| stream->writePackedUInt(id); |
| stream->writePackedUInt(string.size()); |
| stream->write(string.c_str(), string.size()); |
| } |
| } |
| |
| static size_t read_uint(SkStream* stream) { |
| return stream->readPackedUInt(); |
| } |
| |
| static void write_uint(SkWStream* stream, size_t n, uint32_t id) { |
| stream->writePackedUInt(id); |
| stream->writePackedUInt(n); |
| } |
| |
| bool SkFontDescriptor::Deserialize(SkStream* stream, SkFontDescriptor* result) { |
| result->fStyle = (SkTypeface::Style)stream->readPackedUInt(); |
| |
| SkAutoSTMalloc<4, SkFixed> axis; |
| size_t axisCount = 0; |
| size_t index = 0; |
| for (size_t id; (id = stream->readPackedUInt()) != kSentinel;) { |
| switch (id) { |
| case kFontFamilyName: |
| read_string(stream, &result->fFamilyName); |
| break; |
| case kFullName: |
| read_string(stream, &result->fFullName); |
| break; |
| case kPostscriptName: |
| read_string(stream, &result->fPostscriptName); |
| break; |
| case kFontAxes: |
| axisCount = read_uint(stream); |
| axis.reset(axisCount); |
| for (size_t i = 0; i < axisCount; ++i) { |
| axis[i] = read_uint(stream); |
| } |
| break; |
| case kFontIndex: |
| index = read_uint(stream); |
| break; |
| case kFontFileName: // Remove when MIN_PICTURE_VERSION > 41 |
| skip_string(stream); |
| break; |
| default: |
| SkDEBUGFAIL("Unknown id used by a font descriptor"); |
| return false; |
| } |
| } |
| |
| size_t length = stream->readPackedUInt(); |
| if (length > 0) { |
| sk_sp<SkData> data(SkData::MakeUninitialized(length)); |
| if (stream->read(data->writable_data(), length) == length) { |
| result->fFontData.reset(new SkFontData(new SkMemoryStream(data), |
| index, axis, axisCount)); |
| } else { |
| SkDEBUGFAIL("Could not read font data"); |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| void SkFontDescriptor::serialize(SkWStream* stream) { |
| stream->writePackedUInt(fStyle); |
| |
| write_string(stream, fFamilyName, kFontFamilyName); |
| write_string(stream, fFullName, kFullName); |
| write_string(stream, fPostscriptName, kPostscriptName); |
| if (fFontData.get()) { |
| if (fFontData->getIndex()) { |
| write_uint(stream, fFontData->getIndex(), kFontIndex); |
| } |
| if (fFontData->getAxisCount()) { |
| write_uint(stream, fFontData->getAxisCount(), kFontAxes); |
| for (int i = 0; i < fFontData->getAxisCount(); ++i) { |
| stream->writePackedUInt(fFontData->getAxis()[i]); |
| } |
| } |
| } |
| |
| stream->writePackedUInt(kSentinel); |
| |
| if (fFontData.get() && fFontData->hasStream()) { |
| SkAutoTDelete<SkStreamAsset> fontData(fFontData->detachStream()); |
| size_t length = fontData->getLength(); |
| stream->writePackedUInt(length); |
| stream->writeStream(fontData, length); |
| } else { |
| stream->writePackedUInt(0); |
| } |
| } |