gecko/gfx/thebes/public/gfxOS2Platform.h

/* vim: set sw=4 sts=4 et cin: */
/* ***** 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 OS/2 code in Thebes.
 *
 * The Initial Developer of the Original Code is
 * Peter Weilbacher <mozilla@Weilbacher.org>.
 * Portions created by the Initial Developer are Copyright (C) 2006
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *
 * 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_OS2_PLATFORM_H
#define GFX_OS2_PLATFORM_H

#define INCL_GPIBITMAPS
#include <os2.h>

#include "gfxPlatform.h"
#include "gfxOS2Fonts.h"
#include "gfxFontUtils.h"
#include "nsTArray.h"

class gfxFontconfigUtils;

class THEBES_API gfxOS2Platform : public gfxPlatform {

public:
    gfxOS2Platform();
    virtual ~gfxOS2Platform();

    static gfxOS2Platform *GetPlatform() {
        return (gfxOS2Platform*) gfxPlatform::GetPlatform();
    }

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

    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);

    // Given a string and a font we already have, find the font that
    // supports the most code points and most closely resembles aFont.
    // This simple version involves looking at the fonts on the machine to see
    // which code points they support.
    already_AddRefed<gfxOS2Font> FindFontForChar(PRUint32 aCh, gfxOS2Font *aFont);

    // return true if it's already known that we don't have a font for this char
    PRBool noFontWithChar(PRUint32 aCh) {
        return mCodepointsWithNoFonts.test(aCh);
    }

protected:
    void InitDisplayCaps();

    static gfxFontconfigUtils *sFontconfigUtils;

private:
    // when font lookup fails for a character, cache it to skip future searches
    gfxSparseBitSet mCodepointsWithNoFonts;
};

#endif /* GFX_OS2_PLATFORM_H */