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