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 #include "SkTypes.h"
8 #if defined(SK_BUILD_FOR_WIN32)
9
10 #include "SkDWrite.h"
11 #include "SkHRESULT.h"
12 #include "SkOnce.h"
13 #include "SkString.h"
14
15 #include <dwrite.h>
16
17 static IDWriteFactory* gDWriteFactory = nullptr;
18
release_dwrite_factory()19 static void release_dwrite_factory() {
20 if (gDWriteFactory) {
21 gDWriteFactory->Release();
22 }
23 }
24
create_dwrite_factory(IDWriteFactory ** factory)25 static void create_dwrite_factory(IDWriteFactory** factory) {
26 typedef decltype(DWriteCreateFactory)* DWriteCreateFactoryProc;
27 DWriteCreateFactoryProc dWriteCreateFactoryProc = reinterpret_cast<DWriteCreateFactoryProc>(
28 GetProcAddress(LoadLibraryW(L"dwrite.dll"), "DWriteCreateFactory"));
29
30 if (!dWriteCreateFactoryProc) {
31 HRESULT hr = HRESULT_FROM_WIN32(GetLastError());
32 if (!IS_ERROR(hr)) {
33 hr = ERROR_PROC_NOT_FOUND;
34 }
35 HRVM(hr, "Could not get DWriteCreateFactory proc.");
36 }
37
38 HRVM(dWriteCreateFactoryProc(DWRITE_FACTORY_TYPE_SHARED,
39 __uuidof(IDWriteFactory),
40 reinterpret_cast<IUnknown**>(factory)),
41 "Could not create DirectWrite factory.");
42 atexit(release_dwrite_factory);
43 }
44
45
sk_get_dwrite_factory()46 IDWriteFactory* sk_get_dwrite_factory() {
47 static SkOnce once;
48 once(create_dwrite_factory, &gDWriteFactory);
49 return gDWriteFactory;
50 }
51
52 ////////////////////////////////////////////////////////////////////////////////
53 // String conversion
54
55 /** Converts a utf8 string to a WCHAR string. */
sk_cstring_to_wchar(const char * skname,SkSMallocWCHAR * name)56 HRESULT sk_cstring_to_wchar(const char* skname, SkSMallocWCHAR* name) {
57 int wlen = MultiByteToWideChar(CP_UTF8, 0, skname, -1, nullptr, 0);
58 if (0 == wlen) {
59 HRM(HRESULT_FROM_WIN32(GetLastError()),
60 "Could not get length for wchar to utf-8 conversion.");
61 }
62 name->reset(wlen);
63 wlen = MultiByteToWideChar(CP_UTF8, 0, skname, -1, name->get(), wlen);
64 if (0 == wlen) {
65 HRM(HRESULT_FROM_WIN32(GetLastError()), "Could not convert wchar to utf-8.");
66 }
67 return S_OK;
68 }
69
70 /** Converts a WCHAR string to a utf8 string. */
sk_wchar_to_skstring(WCHAR * name,int nameLen,SkString * skname)71 HRESULT sk_wchar_to_skstring(WCHAR* name, int nameLen, SkString* skname) {
72 int len = WideCharToMultiByte(CP_UTF8, 0, name, nameLen, nullptr, 0, nullptr, nullptr);
73 if (0 == len) {
74 if (nameLen <= 0) {
75 skname->reset();
76 return S_OK;
77 }
78 HRM(HRESULT_FROM_WIN32(GetLastError()),
79 "Could not get length for utf-8 to wchar conversion.");
80 }
81 skname->resize(len);
82
83 len = WideCharToMultiByte(CP_UTF8, 0, name, nameLen, skname->writable_str(), len, nullptr, nullptr);
84 if (0 == len) {
85 HRM(HRESULT_FROM_WIN32(GetLastError()), "Could not convert utf-8 to wchar.");
86 }
87 return S_OK;
88 }
89
90 ////////////////////////////////////////////////////////////////////////////////
91 // Locale
92
sk_get_locale_string(IDWriteLocalizedStrings * names,const WCHAR * preferedLocale,SkString * skname)93 void sk_get_locale_string(IDWriteLocalizedStrings* names, const WCHAR* preferedLocale,
94 SkString* skname) {
95 UINT32 nameIndex = 0;
96 if (preferedLocale) {
97 // Ignore any errors and continue with index 0 if there is a problem.
98 BOOL nameExists;
99 names->FindLocaleName(preferedLocale, &nameIndex, &nameExists);
100 if (!nameExists) {
101 nameIndex = 0;
102 }
103 }
104
105 UINT32 nameLen;
106 HRVM(names->GetStringLength(nameIndex, &nameLen), "Could not get name length.");
107
108 SkSMallocWCHAR name(nameLen+1);
109 HRVM(names->GetString(nameIndex, name.get(), nameLen+1), "Could not get string.");
110
111 HRV(sk_wchar_to_skstring(name.get(), nameLen, skname));
112 }
113
SkGetGetUserDefaultLocaleNameProc(SkGetUserDefaultLocaleNameProc * proc)114 HRESULT SkGetGetUserDefaultLocaleNameProc(SkGetUserDefaultLocaleNameProc* proc) {
115 *proc = reinterpret_cast<SkGetUserDefaultLocaleNameProc>(
116 GetProcAddress(LoadLibraryW(L"Kernel32.dll"), "GetUserDefaultLocaleName")
117 );
118 if (!*proc) {
119 HRESULT hr = HRESULT_FROM_WIN32(GetLastError());
120 if (!IS_ERROR(hr)) {
121 hr = ERROR_PROC_NOT_FOUND;
122 }
123 return hr;
124 }
125 return S_OK;
126 }
127
128 #endif//defined(SK_BUILD_FOR_WIN32)
129