Merge WebKit at r75315: Initial merge by git.

Change-Id: I570314b346ce101c935ed22a626b48c2af266b84

1 files changed, 96 insertions, 0 deletions

diff --git a/Source/WebCore/platform/graphics/chromium/FontUtilsChromiumWin.h b/Source/WebCore/platform/graphics/chromium/FontUtilsChromiumWin.h
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+/*
+ * Copyright (c) 2006, 2007, 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.
+
+// FIXME: Move all methods to the files that have their callsites and remove this file.
+// *Utils files are not very WebKit-ty.
+
+#ifndef FontUtilsChromiumWin_h
+#define FontUtilsChromiumWin_h
+
+#include <usp10.h>
+#include <wchar.h>
+#include <windows.h>
+
+#include "FontDescription.h"
+#include <unicode/uscript.h>
+
+namespace WebCore {
+
+// Return a font family that supports a script and belongs to |generic| font
+// family.  It can return NULL and a caller has to implement its own fallback.
+const UChar* getFontFamilyForScript(UScriptCode, FontDescription::GenericFamilyType);
+
+// Return a font family that can render |characters| based on
+// what script characters belong to. When char_checked is non-NULL,
+// it's filled with the character used to determine the script.
+// When script_checked is non-NULL, the script used to determine
+// the family is returned.
+// FIXME: This function needs a total overhaul.
+const UChar* getFallbackFamily(const UChar* characters, int length,
+                               FontDescription::GenericFamilyType,
+                               UChar32* charChecked,
+                               UScriptCode* scriptChecked);
+
+// 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.
+// FIXME: 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 UChar* family, int style, LOGFONT*, int* ascent, HFONT*, SCRIPT_CACHE**);
+
+enum {
+    FontStyleNormal = 0,
+    FontStyleBold = 1,
+    FontStyleItalic = 2,
+    FontStyleUnderlined = 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*);
+
+}  // namespace WebCore
+
+#endif  // FontUtilsChromiumWin_h