1 /* 2 * Copyright 2014 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8 #ifndef SkDWrite_DEFINED 9 #define SkDWrite_DEFINED 10 11 #include "SkTemplates.h" 12 13 #include <dwrite.h> 14 15 class SkString; 16 17 //////////////////////////////////////////////////////////////////////////////// 18 // Factory 19 20 IDWriteFactory* sk_get_dwrite_factory(); 21 22 //////////////////////////////////////////////////////////////////////////////// 23 // String conversion 24 25 /** Prefer to use this type to prevent template proliferation. */ 26 typedef SkAutoSTMalloc<16, WCHAR> SkSMallocWCHAR; 27 28 /** Converts a utf8 string to a WCHAR string. */ 29 HRESULT sk_cstring_to_wchar(const char* skname, SkSMallocWCHAR* name); 30 31 /** Converts a WCHAR string to a utf8 string. */ 32 HRESULT sk_wchar_to_skstring(WCHAR* name, SkString* skname); 33 34 //////////////////////////////////////////////////////////////////////////////// 35 // Locale 36 37 void sk_get_locale_string(IDWriteLocalizedStrings* names, const WCHAR* preferedLocale, 38 SkString* skname); 39 40 typedef decltype(GetUserDefaultLocaleName)* SkGetUserDefaultLocaleNameProc; 41 HRESULT SkGetGetUserDefaultLocaleNameProc(SkGetUserDefaultLocaleNameProc* proc); 42 43 //////////////////////////////////////////////////////////////////////////////// 44 // Table handling 45 46 class AutoDWriteTable { 47 public: 48 AutoDWriteTable(IDWriteFontFace* fontFace, UINT32 beTag) : fFontFace(fontFace), fExists(FALSE) { 49 // Any errors are ignored, user must check fExists anyway. 50 fontFace->TryGetFontTable(beTag, 51 reinterpret_cast<const void **>(&fData), &fSize, &fLock, &fExists); 52 } 53 ~AutoDWriteTable() { 54 if (fExists) { 55 fFontFace->ReleaseFontTable(fLock); 56 } 57 } 58 59 const uint8_t* fData; 60 UINT32 fSize; 61 BOOL fExists; 62 private: 63 // Borrowed reference, the user must ensure the fontFace stays alive. 64 IDWriteFontFace* fFontFace; 65 void* fLock; 66 }; 67 template<typename T> class AutoTDWriteTable : public AutoDWriteTable { 68 public: 69 static const UINT32 tag = DWRITE_MAKE_OPENTYPE_TAG(T::TAG0, T::TAG1, T::TAG2, T::TAG3); 70 AutoTDWriteTable(IDWriteFontFace* fontFace) : AutoDWriteTable(fontFace, tag) { } 71 72 const T* get() const { return reinterpret_cast<const T*>(fData); } 73 const T* operator->() const { return reinterpret_cast<const T*>(fData); } 74 }; 75 76 #endif 77
