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// Copyright (c) 2010 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_RENDERER_RENDERER_SANDBOX_SUPPORT_LINUX_H_
#define CHROME_RENDERER_RENDERER_SANDBOX_SUPPORT_LINUX_H_
#pragma once
#include <stdint.h>
#include <string>
namespace WebKit {
struct WebFontRenderStyle;
}
namespace renderer_sandbox_support {
// Return a font family which provides glyphs for the Unicode code points
// specified by |utf16|
// utf16: a native-endian UTF16 string
// num_utf16: the number of 16-bit words in |utf16|
// preferred_locale: preferred locale identifier for the |utf16|
//
// Returns: the font family or an empty string if the request could not be
// satisfied.
std::string getFontFamilyForCharacters(const uint16_t* utf16,
size_t num_utf16,
const char* preferred_locale);
void getRenderStyleForStrike(const char* family, int sizeAndStyle,
WebKit::WebFontRenderStyle* out);
// Returns a file descriptor for a shared memory segment.
// The second argument is ignored because SHM segments are always
// mappable with PROT_EXEC on Linux.
int MakeSharedMemorySegmentViaIPC(size_t length, bool executable);
// Return a read-only file descriptor to the font which best matches the given
// properties or -1 on failure.
// charset: specifies the language(s) that the font must cover. See
// render_sandbox_host_linux.cc for more information.
int MatchFontWithFallback(const std::string& face, bool bold,
bool italic, int charset);
// GetFontTable loads a specified font table from an open SFNT file.
// fd: a file descriptor to the SFNT file. The position doesn't matter.
// table: the table in *big-endian* format, or 0 for the whole font file.
// output: a buffer of size output_length that gets the data. can be 0, in
// which case output_length will be set to the required size in bytes.
// output_length: size of output, if it's not 0.
//
// returns: true on success.
bool GetFontTable(int fd, uint32_t table, uint8_t* output,
size_t* output_length);
}; // namespace render_sandbox_support
#endif // CHROME_RENDERER_RENDERER_SANDBOX_SUPPORT_LINUX_H_
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