gecko/gfx/thebes/gfxFT2Fonts.h

/* -*- 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 Foundation code.
 *
 * The Initial Developer of the Original Code is Mozilla Foundation.
 * Portions created by the Initial Developer are Copyright (C) 2005
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Vladimir Vukicevic <vladimir@mozilla.com>
 *   Masayuki Nakano <masayuki@d-toybox.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_FT2FONTS_H
#define GFX_FT2FONTS_H

#include "cairo.h"
#include "gfxTypes.h"
#include "gfxFont.h"
#include "gfxFT2FontBase.h"
#include "gfxContext.h"
#include "gfxFontUtils.h"
#include "gfxUserFontSet.h"

class FT2FontEntry;

class gfxFT2Font : public gfxFT2FontBase {
public: // new functions
    gfxFT2Font(cairo_scaled_font_t *aCairoFont,
               FT2FontEntry *aFontEntry,
               const gfxFontStyle *aFontStyle,
               bool aNeedsBold);
    virtual ~gfxFT2Font ();

    cairo_font_face_t *CairoFontFace();

    FT2FontEntry *GetFontEntry();

    static already_AddRefed<gfxFT2Font>
    GetOrMakeFont(const nsAString& aName, const gfxFontStyle *aStyle,
                  bool aNeedsBold = false);

    static already_AddRefed<gfxFT2Font>
    GetOrMakeFont(FT2FontEntry *aFontEntry, const gfxFontStyle *aStyle,
                  bool aNeedsBold = false);

    struct CachedGlyphData {
        CachedGlyphData()
            : glyphIndex(0xffffffffU) { }

        CachedGlyphData(PRUint32 gid)
            : glyphIndex(gid) { }

        PRUint32 glyphIndex;
        PRInt32 lsbDelta;
        PRInt32 rsbDelta;
        PRInt32 xAdvance;
    };

    const CachedGlyphData* GetGlyphDataForChar(PRUint32 ch) {
        CharGlyphMapEntryType *entry = mCharGlyphCache.PutEntry(ch);

        if (!entry)
            return nsnull;

        if (entry->mData.glyphIndex == 0xffffffffU) {
            // this is a new entry, fill it
            FillGlyphDataForChar(ch, &entry->mData);
        }

        return &entry->mData;
    }

protected:
    virtual bool ShapeWord(gfxContext *aContext,
                           gfxShapedWord *aShapedWord,
                           const PRUnichar *aString,
                           bool aPreferPlatformShaping = false);

    void FillGlyphDataForChar(PRUint32 ch, CachedGlyphData *gd);

    void AddRange(gfxShapedWord *aShapedWord, const PRUnichar *str);

    typedef nsBaseHashtableET<nsUint32HashKey, CachedGlyphData> CharGlyphMapEntryType;
    typedef nsTHashtable<CharGlyphMapEntryType> CharGlyphMap;
    CharGlyphMap mCharGlyphCache;
};

#ifndef ANDROID // not needed on Android, uses the standard gfxFontGroup directly
class THEBES_API gfxFT2FontGroup : public gfxFontGroup {
public: // new functions
    gfxFT2FontGroup (const nsAString& families,
                    const gfxFontStyle *aStyle,
                    gfxUserFontSet *aUserFontSet);
    virtual ~gfxFT2FontGroup ();

protected: // from gfxFontGroup

    virtual gfxFontGroup *Copy(const gfxFontStyle *aStyle);


protected: // new functions

    static bool FontCallback (const nsAString & fontName, 
                                const nsACString & genericName, 
                                bool aUseFontSet,
                                void *closure);
    bool mEnableKerning;

    void GetPrefFonts(nsIAtom *aLangGroup,
                      nsTArray<nsRefPtr<gfxFontEntry> >& aFontEntryList);
    void GetCJKPrefFonts(nsTArray<nsRefPtr<gfxFontEntry> >& aFontEntryList);
    void FamilyListToArrayList(const nsString& aFamilies,
                               nsIAtom *aLangGroup,
                               nsTArray<nsRefPtr<gfxFontEntry> > *aFontEntryList);
    already_AddRefed<gfxFT2Font> WhichFontSupportsChar(const nsTArray<nsRefPtr<gfxFontEntry> >& aFontEntryList,
                                                       PRUint32 aCh);
    already_AddRefed<gfxFont> WhichPrefFontSupportsChar(PRUint32 aCh);
    already_AddRefed<gfxFont> WhichSystemFontSupportsChar(PRUint32 aCh);

    nsTArray<gfxTextRange> mRanges;
    nsString mString;
};
#endif // !ANDROID

#endif /* GFX_FT2FONTS_H */