diff options
Diffstat (limited to 'webkit/port/platform/graphics/FontUtilsWin.h')
-rw-r--r-- | webkit/port/platform/graphics/FontUtilsWin.h | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/webkit/port/platform/graphics/FontUtilsWin.h b/webkit/port/platform/graphics/FontUtilsWin.h new file mode 100644 index 0000000..1ec49eb --- /dev/null +++ b/webkit/port/platform/graphics/FontUtilsWin.h @@ -0,0 +1,87 @@ +// Copyright (c) 2006-2008 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. +// +// A collection of utilities for font handling. + +#ifndef FontUtilsWin_h +#define FontUtilsWin_h + +#include <usp10.h> +#include <wchar.h> +#include <windows.h> + +#include <unicode/uscript.h> + +namespace WebCore { + +// 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 return NULL and a caller has to implement its own fallback. +const UChar* GetFontFamilyForScript(UScriptCode script, + GenericFamilyType generic); + +// 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. +// TODO(jungshik) : This function needs a total overhaul. +const UChar* GetFallbackFamily(const UChar* characters, + int length, + GenericFamilyType generic, + UChar32 *char_checked, + UScriptCode *script_checked); + +// 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 UChar *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 WebCore + +#endif // FontUtilsWin_h |