content/public/common/dwrite_font_platform_win.h

   1 // Copyright 2014 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 CONTENT_PUBLIC_COMMON_DWRITE_FONT_PLATFORM_WIN_H_
   6 #define CONTENT_PUBLIC_COMMON_DWRITE_FONT_PLATFORM_WIN_H_
   7
   8 #include "base/files/file.h"
   9 #include "content/common/content_export.h"
  10
  11 struct IDWriteFactory;
  12 struct IDWriteFontCollection;
  13
  14 namespace content {
  15
  16 // This is the shared section that is used between browser and renderer for
  17 // loading font cache. Section name is suffixed with browser process id so that
  18 // multiple instance chrome scenario works fine.
  19 CONTENT_EXPORT extern const char kFontCacheSharedSectionName[];
  20
  21 // Function returns custom font collection in terms of IDWriteFontCollection.
  22 // This function maintains singleton instance of font collection and returns
  23 // it on repeated calls.
  24 CONTENT_EXPORT IDWriteFontCollection* GetCustomFontCollection(
  25     IDWriteFactory* factory);
  26
  27 // Builds static font cache. As this function need to iterate through all
  28 // available fonts in the system, it may take a while.
  29 CONTENT_EXPORT bool BuildFontCache(const base::FilePath& file);
  30
  31 // Loads font cache from file. This is supposed to be used from browser
  32 // side where loading means creating readonly shared memory file mapping so that
  33 // renderers can read from it.
  34 CONTENT_EXPORT bool LoadFontCache(const base::FilePath& path);
  35
  36 // Added in header mainly for unittest
  37 CONTENT_EXPORT bool ValidateFontCacheFile(base::File* file);
  38
  39 }  // namespace content
  40
  41 #endif  // CONTENT_PUBLIC_COMMON_DWRITE_FONT_PLATFORM_WIN_H_