1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/skia/trunk/src/sfnt/SkOTUtils.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,89 @@
1.4 +/*
1.5 + * Copyright 2012 Google Inc.
1.6 + *
1.7 + * Use of this source code is governed by a BSD-style license that can be
1.8 + * found in the LICENSE file.
1.9 + */
1.10 +
1.11 +#ifndef SkOTUtils_DEFINED
1.12 +#define SkOTUtils_DEFINED
1.13 +
1.14 +#include "SkOTTableTypes.h"
1.15 +#include "SkOTTable_name.h"
1.16 +#include "SkTypeface.h"
1.17 +
1.18 +class SkData;
1.19 +class SkStream;
1.20 +
1.21 +struct SkOTUtils {
1.22 + /**
1.23 + * Calculates the OpenType checksum for data.
1.24 + */
1.25 + static uint32_t CalcTableChecksum(SK_OT_ULONG *data, size_t length);
1.26 +
1.27 + /**
1.28 + * Renames an sfnt font. On failure (invalid data or not an sfnt font)
1.29 + * returns NULL.
1.30 + *
1.31 + * Essentially, this removes any existing 'name' table and replaces it
1.32 + * with a new one in which FontFamilyName, FontSubfamilyName,
1.33 + * UniqueFontIdentifier, FullFontName, and PostscriptName are fontName.
1.34 + *
1.35 + * The new 'name' table records will be written with the Windows,
1.36 + * UnicodeBMPUCS2, and English_UnitedStates settings.
1.37 + *
1.38 + * fontName and fontNameLen must be specified in terms of ASCII chars.
1.39 + */
1.40 + static SkData* RenameFont(SkStream* fontData, const char* fontName, int fontNameLen);
1.41 +
1.42 + /** An implementation of LocalizedStrings which obtains it's data from a 'name' table. */
1.43 + class LocalizedStrings_NameTable : public SkTypeface::LocalizedStrings {
1.44 + public:
1.45 + /** Takes ownership of the nameTableData and will free it with SK_DELETE. */
1.46 + LocalizedStrings_NameTable(SkOTTableName* nameTableData,
1.47 + SkOTTableName::Record::NameID::Predefined::Value types[],
1.48 + int typesCount)
1.49 + : fTypes(types), fTypesCount(typesCount), fTypesIndex(0)
1.50 + , fNameTableData(nameTableData), fFamilyNameIter(*nameTableData, fTypes[fTypesIndex])
1.51 + { }
1.52 +
1.53 + /** Creates an iterator over all the family names in the 'name' table of a typeface.
1.54 + * If no valid 'name' table can be found, returns NULL.
1.55 + */
1.56 + static LocalizedStrings_NameTable* CreateForFamilyNames(const SkTypeface& typeface);
1.57 +
1.58 + virtual bool next(SkTypeface::LocalizedString* localizedString) SK_OVERRIDE;
1.59 + private:
1.60 + static SkOTTableName::Record::NameID::Predefined::Value familyNameTypes[3];
1.61 +
1.62 + SkOTTableName::Record::NameID::Predefined::Value* fTypes;
1.63 + int fTypesCount;
1.64 + int fTypesIndex;
1.65 + SkAutoTDeleteArray<SkOTTableName> fNameTableData;
1.66 + SkOTTableName::Iterator fFamilyNameIter;
1.67 + };
1.68 +
1.69 + /** An implementation of LocalizedStrings which has one name. */
1.70 + class LocalizedStrings_SingleName : public SkTypeface::LocalizedStrings {
1.71 + public:
1.72 + LocalizedStrings_SingleName(SkString name, SkString language)
1.73 + : fName(name), fLanguage(language), fHasNext(true)
1.74 + { }
1.75 +
1.76 + virtual bool next(SkTypeface::LocalizedString* localizedString) SK_OVERRIDE {
1.77 + localizedString->fString = fName;
1.78 + localizedString->fLanguage = fLanguage;
1.79 +
1.80 + bool hadNext = fHasNext;
1.81 + fHasNext = false;
1.82 + return hadNext;
1.83 + }
1.84 +
1.85 + private:
1.86 + SkString fName;
1.87 + SkString fLanguage;
1.88 + bool fHasNext;
1.89 + };
1.90 +};
1.91 +
1.92 +#endif
