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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 {
- public:
- /** 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;
- private:
- static SK_OT_USHORT familyNameTypes[3];
- SK_OT_USHORT* fTypes;
- 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 {
- 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;
- };
- static void SetAdvancedTypefaceFlags(SkOTTableOS2_V4::Type fsType,
- SkAdvancedTypefaceMetrics* info);
- };
- #endif
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