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+// Copyright 2008, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//    * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//    * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//    * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+// A collection of utilities for font handling.
+
+#ifndef BASE_GFX_FONT_UTILS_H__
+#define BASE_GFX_FONT_UTILS_H__
+
+#include <usp10.h>
+#include <wchar.h>
+#include <windows.h>
+
+#include <unicode/uscript.h>
+
+namespace gfx {
+
+// The order of family types needs to be exactly the same as
+// WebCore::FontDescription::GenericFamilyType. We may lift that restriction
+// when we make webkit_glue::WebkitGenericToChromeGenericFamily more
+// intelligent.
+enum GenericFamilyType {
+  GENERIC_FAMILY_NONE = 0,
+  GENERIC_FAMILY_STANDARD,
+  GENERIC_FAMILY_SERIF,
+  GENERIC_FAMILY_SANSSERIF,
+  GENERIC_FAMILY_MONOSPACE,
+  GENERIC_FAMILY_CURSIVE,
+  GENERIC_FAMILY_FANTASY
+};
+
+// Return a font family that supports a script and belongs to |generic| font family.
+// It can retun NULL and a caller has to implement its own fallback.
+const wchar_t* GetFontFamilyForScript(UScriptCode script,
+                                      GenericFamilyType generic);
+
+// Return a font family that can render |characters| based on
+// what script characters belong to.
+const wchar_t* GetFallbackFamily(const wchar_t *characters, int length,
+                                 GenericFamilyType generic);
+
+// Derive a new HFONT by replacing lfFaceName of LOGFONT with |family|,
+// calculate the ascent for the derived HFONT, and initialize SCRIPT_CACHE
+// in FontData.
+// |style| is only used for cache key generation. |style| is
+// bit-wise OR of BOLD(1), UNDERLINED(2) and ITALIC(4) and
+// should match what's contained in LOGFONT. It should be calculated
+// by calling GetStyleFromLogFont.
+// Returns false if the font is not accessible, in which case |ascent| field
+// of |fontdata| is set to kUndefinedAscent.
+// Be aware that this is not thread-safe.
+// TODO(jungshik): Instead of having three out params, we'd better have one
+// (|*FontData|), but somehow it mysteriously messes up the layout for
+// certain complex script pages (e.g. hi.wikipedia.org) and also crashes
+// at the start-up if recently visited page list includes pages with complex
+// scripts in their title. Moreover, somehow the very first-pass of
+// intl2 page-cycler test is noticeably slower with one out param than
+// the current version although the subsequent 9 passes take about the
+// same time.
+bool GetDerivedFontData(const wchar_t *family,
+                        int style,
+                        LOGFONT *logfont,
+                        int *ascent,
+                        HFONT *hfont,
+                        SCRIPT_CACHE **script_cache);
+
+enum {
+  FONT_STYLE_NORMAL = 0,
+  FONT_STYLE_BOLD = 1,
+  FONT_STYLE_ITALIC = 2,
+  FONT_STYLE_UNDERLINED = 4
+};
+
+// Derive style (bit-wise OR of FONT_STYLE_BOLD, FONT_STYLE_UNDERLINED, and
+// FONT_STYLE_ITALIC) from LOGFONT. Returns 0 if |*logfont| is NULL.
+int GetStyleFromLogfont(const LOGFONT *logfont);
+
+}  // namespace gfx
+
+#endif // BASE_GFX_FONT_UTILS_H__