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* Copyright 2012 Google Inc.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
#ifndef SkOTUtils_DEFINED
#define SkOTUtils_DEFINED
#include "include/core/SkTypeface.h"
#include "src/sfnt/SkOTTableTypes.h"
#include "src/sfnt/SkOTTable_OS_2_V4.h"
#include "src/sfnt/SkOTTable_name.h"
class SkData;
class SkStream;
struct SkAdvancedTypefaceMetrics;
struct SkOTUtils {
* Calculates the OpenType checksum for data.
static uint32_t CalcTableChecksum(SK_OT_ULONG *data, size_t length);
* Renames an sfnt font. On failure (invalid data or not an sfnt font)
* returns nullptr.
* Essentially, this removes any existing 'name' table and replaces it
* with a new one in which FontFamilyName, FontSubfamilyName,
* UniqueFontIdentifier, FullFontName, and PostscriptName are fontName.
* The new 'name' table records will be written with the Windows,
* UnicodeBMPUCS2, and English_UnitedStates settings.
* fontName and fontNameLen must be specified in terms of ASCII chars.
* Does not affect fontData's ownership.
static SkData* RenameFont(SkStreamAsset* fontData, const char* fontName, int fontNameLen);
/** An implementation of LocalizedStrings which obtains it's data from a 'name' table. */
class LocalizedStrings_NameTable : public SkTypeface::LocalizedStrings {
/** Takes ownership of the nameTableData and will free it with SK_DELETE. */
LocalizedStrings_NameTable(std::unique_ptr<uint8_t[]> nameTableData, size_t size,
SK_OT_USHORT types[],
int typesCount)
: fTypes(types), fTypesCount(typesCount), fTypesIndex(0)
, fNameTableData(std::move(nameTableData))
, fFamilyNameIter(fNameTableData.get(), size, fTypes[fTypesIndex])
{ }
/** Creates an iterator over all data in the 'name' table of a typeface.
* If no valid 'name' table can be found, returns nullptr.
static sk_sp<LocalizedStrings_NameTable> Make(
const SkTypeface& typeface,
SK_OT_USHORT types[],
int typesCount);
/** Creates an iterator over all the family names in the 'name' table of a typeface.
* If no valid 'name' table can be found, returns nullptr.
static sk_sp<LocalizedStrings_NameTable> MakeForFamilyNames(const SkTypeface& typeface);
bool next(SkTypeface::LocalizedString* localizedString) override;
static SK_OT_USHORT familyNameTypes[3];
int fTypesCount;
int fTypesIndex;
std::unique_ptr<uint8_t[]> fNameTableData;
SkOTTableName::Iterator fFamilyNameIter;
/** An implementation of LocalizedStrings which has one name. */
class LocalizedStrings_SingleName : public SkTypeface::LocalizedStrings {
LocalizedStrings_SingleName(SkString name, SkString language)
: fName(std::move(name)), fLanguage(std::move(language)), fHasNext(true) {}
bool next(SkTypeface::LocalizedString* localizedString) override {
localizedString->fString = fName;
localizedString->fLanguage = fLanguage;
bool hadNext = fHasNext;
fHasNext = false;
return hadNext;
SkString fName;
SkString fLanguage;
bool fHasNext;
static void SetAdvancedTypefaceFlags(SkOTTableOS2_V4::Type fsType,
SkAdvancedTypefaceMetrics* info);