gecko/gfx/thebes/gfxGraphiteShaper.h

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/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla Graphite integration code.
*
* The Initial Developer of the Original Code is Mozilla Foundation.
* Portions created by the Initial Developer are Copyright (C) 2011
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Jonathan Kew <jfkthame@gmail.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#ifndef GFX_GRAPHITESHAPER_H
#define GFX_GRAPHITESHAPER_H
#include "gfxTypes.h"
#include "gfxFont.h"
#include "nsDataHashtable.h"
#include "nsHashKeys.h"
struct gr_face;
struct gr_font;
struct gr_segment;
class gfxGraphiteShaper : public gfxFontShaper {
public:
gfxGraphiteShaper(gfxFont *aFont);
virtual ~gfxGraphiteShaper();
virtual bool ShapeWord(gfxContext *aContext,
gfxShapedWord *aShapedWord,
const PRUnichar *aText);
const void* GetTable(PRUint32 aTag, size_t *aLength);
static void Shutdown();
struct CallbackData {
gfxFont *mFont;
gfxGraphiteShaper *mShaper;
gfxContext *mContext;
};
struct TableRec {
hb_blob_t *mBlob;
const void *mData;
PRUint32 mLength;
};
protected:
nsresult SetGlyphsFromSegment(gfxShapedWord *aShapedWord,
gr_segment *aSegment);
gr_face *mGrFace;
gr_font *mGrFont;
CallbackData mCallbackData;
nsDataHashtable<nsUint32HashKey,TableRec> mTables;
// Whether the font implements GetGlyphWidth, or we should read tables
// directly to get ideal widths
bool mUseFontGlyphWidths;
// Convert HTML 'lang' (BCP47) to Graphite language code
static PRUint32 GetGraphiteTagForLang(const nsCString& aLang);
static nsTHashtable<nsUint32HashKey> sLanguageTags;
};
#endif /* GFX_GRAPHITESHAPER_H */