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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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