content/public/common/child_process_sandbox_support_linux.h

   1 // Copyright (c) 2012 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_CHILD_PROCESS_SANDBOX_SUPPORT_LINUX_H_
   6 #define CONTENT_PUBLIC_COMMON_CHILD_PROCESS_SANDBOX_SUPPORT_LINUX_H_
   7
   8 #include <stdint.h>
   9 #include <string>
  10
  11 #include "content/common/content_export.h"
  12 #include "ppapi/c/trusted/ppb_browser_font_trusted.h"
  13
  14 namespace content {
  15
  16 // Returns a file descriptor for a shared memory segment.  The
  17 // executable flag indicates that the caller intends to use mprotect
  18 // with PROT_EXEC after making a mapping, but not that it intends to
  19 // mmap with PROT_EXEC in the first place.  (Some systems, such as
  20 // ChromeOS, disallow PROT_EXEC in mmap on /dev/shm files but do allow
  21 // PROT_EXEC in mprotect on mappings from such files.  This function
  22 // can yield an object that has that constraint.)
  23 CONTENT_EXPORT int MakeSharedMemorySegmentViaIPC(size_t length,
  24                                                  bool executable);
  25
  26 // Return a read-only file descriptor to the font which best matches the given
  27 // properties or -1 on failure.
  28 //   charset: specifies the language(s) that the font must cover. See
  29 // render_sandbox_host_linux.cc for more information.
  30 // fallback_family: If not set to PP_BROWSERFONT_TRUSTED_FAMILY_DEFAULT, font
  31 // selection should fall back to generic Windows font names like Arial and
  32 // Times New Roman.
  33 CONTENT_EXPORT int MatchFontWithFallback(
  34     const std::string& face,
  35     bool bold,
  36     bool italic,
  37     int charset,
  38     PP_BrowserFont_Trusted_Family fallback_family);
  39
  40 // GetFontTable loads a specified font table from an open SFNT file.
  41 //   fd: a file descriptor to the SFNT file. The position doesn't matter.
  42 //   table_tag: the table tag in *big-endian* format, or 0 for the entire font.
  43 //   offset: offset into the table or entire font where loading should start.
  44 //     The offset must be between 0 and 1 GB - 1.
  45 //   output: a buffer of size output_length that gets the data.  can be 0, in
  46 //     which case output_length will be set to the required size in bytes.
  47 //   output_length: size of output, if it's not 0.
  48 //
  49 //   returns: true on success.
  50 CONTENT_EXPORT bool GetFontTable(int fd, uint32_t table_tag, off_t offset,
  51                                  uint8_t* output, size_t* output_length);
  52
  53 };  // namespace content
  54
  55 #endif  // CONTENT_PUBLIC_COMMON_CHILD_PROCESS_SANDBOX_SUPPORT_LINUX_H_