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1 // Copyright 2015 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #ifndef COMPONENTS_FONT_SERVICE_PUBLIC_CPP_FONT_LOADER_H_ | |
6 #define COMPONENTS_FONT_SERVICE_PUBLIC_CPP_FONT_LOADER_H_ | |
7 | |
8 #include "base/containers/hash_tables.h" | |
9 #include "base/memory/ref_counted.h" | |
10 #include "base/synchronization/lock.h" | |
11 #include "components/font_service/public/cpp/mapped_font_file.h" | |
12 #include "components/font_service/public/interfaces/font_service.mojom.h" | |
13 #include "third_party/skia/include/core/SkStream.h" | |
14 #include "third_party/skia/include/core/SkTypeface.h" | |
15 #include "third_party/skia/include/ports/SkFontConfigInterface.h" | |
16 | |
17 namespace mojo { | |
18 class ApplicationImpl; | |
19 } | |
20 | |
21 namespace font_service { | |
22 namespace internal { | |
23 class FontServiceThread; | |
24 } | |
25 | |
26 // FontConfig implementation for Skia which proxies to the font service to get | |
27 // out of the sandbox. This methods of this class (as imposed by blink | |
28 // requirements) may be called on any thread. (Because of this restriction, | |
29 // also see the FontServiceThread class.) | |
30 // | |
31 // This is the mojo equivalent to content/common/font_config_ipc_linux.h | |
32 class FontLoader : public SkFontConfigInterface, | |
33 public internal::MappedFontFile::Observer { | |
34 public: | |
35 explicit FontLoader(mojo::ApplicationImpl* application_impl); | |
36 ~FontLoader() override; | |
37 | |
38 // SkFontConfigInterface: | |
39 bool matchFamilyName(const char family_name[], | |
40 SkTypeface::Style requested, | |
41 FontIdentity* out_font_identifier, | |
42 SkString* out_family_name, | |
43 SkTypeface::Style* out_style) override; | |
44 SkStreamAsset* openStream(const FontIdentity& identity) override; | |
45 | |
46 private: | |
47 // internal::MappedFontFile::Observer: | |
48 void OnMappedFontFileDestroyed(internal::MappedFontFile* f) override; | |
49 | |
50 // Thread to own the mojo message pipe. Because FontLoader can be called on | |
51 // multiple threads, we create a dedicated thread to send and receive mojo | |
52 // message calls. | |
53 scoped_refptr<internal::FontServiceThread> thread_; | |
54 | |
55 // Lock preventing multiple threads from opening font file and accessing | |
56 // |mapped_font_files_| map at the same time. | |
57 base::Lock lock_; | |
58 | |
59 // Maps font identity ID to the memory-mapped file with font data. | |
60 base::hash_map<uint32_t, internal::MappedFontFile*> mapped_font_files_; | |
61 | |
62 DISALLOW_COPY_AND_ASSIGN(FontLoader); | |
63 }; | |
64 | |
65 } // namespace font_service | |
66 | |
67 #endif // COMPONENTS_FONT_SERVICE_PUBLIC_CPP_FONT_LOADER_H_ | |
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