gecko/gfx/thebes/gfxAndroidPlatform.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 Android port code.
 *
 * The Initial Developer of the Original Code is
 *   Mozilla Foundation
 * Portions created by the Initial Developer are Copyright (C) 2010
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Vladimir Vukicevic <vladimir@pobox.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
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 * ***** END LICENSE BLOCK ***** */

#ifndef GFX_PLATFORM_ANDROID_H
#define GFX_PLATFORM_ANDROID_H

#include "gfxFontUtils.h"
#include "gfxFT2Fonts.h"
#include "gfxPlatform.h"
#include "nsDataHashtable.h"
#include "nsTArray.h"

typedef struct FT_LibraryRec_ *FT_Library;

class FontFamily;
class FontEntry;

class THEBES_API gfxAndroidPlatform : public gfxPlatform {
public:
    gfxAndroidPlatform();
    virtual ~gfxAndroidPlatform();

    static gfxAndroidPlatform *GetPlatform() {
        return (gfxAndroidPlatform*) gfxPlatform::GetPlatform();
    }

    already_AddRefed<gfxASurface> CreateOffscreenSurface(const gfxIntSize& size,
                                                         gfxASurface::gfxImageFormat imageFormat);

    virtual PRBool IsFontFormatSupported(nsIURI *aFontURI, PRUint32 aFormatFlags);
    virtual gfxPlatformFontList* CreatePlatformFontList();
    virtual gfxFontEntry* MakePlatformFont(const gfxProxyFontEntry *aProxyEntry,
                                     const PRUint8 *aFontData, PRUint32 aLength);

    nsresult GetFontList(nsIAtom *aLangGroup,
                         const nsACString& aGenericFamily,
                         nsTArray<nsString>& aListOfFonts);

    nsresult UpdateFontList();

    nsresult ResolveFontName(const nsAString& aFontName,
                             FontResolverCallback aCallback,
                             void *aClosure, PRBool& aAborted);

    nsresult GetStandardFamilyName(const nsAString& aFontName, nsAString& aFamilyName);

    gfxFontGroup *CreateFontGroup(const nsAString &aFamilies,
                                  const gfxFontStyle *aStyle,
                                  gfxUserFontSet* aUserFontSet);

    FontFamily *FindFontFamily(const nsAString& aName);
    FontEntry *FindFontEntry(const nsAString& aFamilyName, const gfxFontStyle& aFontStyle);
    already_AddRefed<gfxFont> FindFontForChar(PRUint32 aCh, gfxFont *aFont);
    PRBool GetPrefFontEntries(const nsCString& aLangGroup, nsTArray<nsRefPtr<gfxFontEntry> > *aFontEntryList);
    void SetPrefFontEntries(const nsCString& aLangGroup, nsTArray<nsRefPtr<gfxFontEntry> >& aFontEntryList);

    FT_Library GetFTLibrary();

protected:
    void AppendFacesFromFontFile(const char *aFileName);

    typedef nsDataHashtable<nsStringHashKey, nsRefPtr<FontFamily> > FontTable;

    FontTable mFonts;
    FontTable mFontAliases;
    FontTable mFontSubstitutes;

    // when system-wide font lookup fails for a character, cache it to skip future searches
    gfxSparseBitSet mCodepointsWithNoFonts;
    
    nsDataHashtable<nsCStringHashKey, nsTArray<nsRefPtr<gfxFontEntry> > > mPrefFonts;
};

#endif /* GFX_PLATFORM_ANDROID_H */