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