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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 "SkOTTableTypes.h"
#include "SkOTTable_name.h"
#include "SkTypeface.h"
class SkData;
class SkStream;
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 {
public:
/** Takes ownership of the nameTableData and will free it with SK_DELETE. */
LocalizedStrings_NameTable(SkOTTableName* nameTableData,
SkOTTableName::Record::NameID::Predefined::Value types[],
int typesCount)
: fTypes(types), fTypesCount(typesCount), fTypesIndex(0)
, fNameTableData(nameTableData), fFamilyNameIter(*nameTableData, fTypes[fTypesIndex])
{ }
/** 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 LocalizedStrings_NameTable* CreateForFamilyNames(const SkTypeface& typeface);
bool next(SkTypeface::LocalizedString* localizedString) override;
private:
static SkOTTableName::Record::NameID::Predefined::Value familyNameTypes[3];
SkOTTableName::Record::NameID::Predefined::Value* fTypes;
int fTypesCount;
int fTypesIndex;
SkAutoTDeleteArray<SkOTTableName> fNameTableData;
SkOTTableName::Iterator fFamilyNameIter;
};
/** An implementation of LocalizedStrings which has one name. */
class LocalizedStrings_SingleName : public SkTypeface::LocalizedStrings {
public:
LocalizedStrings_SingleName(SkString name, SkString language)
: fName(name), fLanguage(language), fHasNext(true)
{ }
bool next(SkTypeface::LocalizedString* localizedString) override {
localizedString->fString = fName;
localizedString->fLanguage = fLanguage;
bool hadNext = fHasNext;
fHasNext = false;
return hadNext;
}
private:
SkString fName;
SkString fLanguage;
bool fHasNext;
};
};
#endif
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