gecko-dev/gfx/thebes/public/gfxWindowsPlatform.h

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 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
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 * 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
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 * License.
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 * 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) 2006
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Stuart Parmenter <pavlov@pavlov.net>
 *   Masayuki Nakano <masayuki@d-toybox.com>
 *
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#ifndef GFX_WINDOWS_PLATFORM_H
#define GFX_WINDOWS_PLATFORM_H

#include "gfxWindowsSurface.h"
#include "gfxWindowsFonts.h"
#include "gfxPlatform.h"

#include "nsVoidArray.h"
#include "nsDataHashtable.h"

#include <windows.h>

class THEBES_API gfxWindowsPlatform : public gfxPlatform {
public:
    gfxWindowsPlatform();
    virtual ~gfxWindowsPlatform();
    static gfxWindowsPlatform *GetPlatform() {
        return (gfxWindowsPlatform*) gfxPlatform::GetPlatform();
    }

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

    nsresult GetFontList(const nsACString& aLangGroup,
                         const nsACString& aGenericFamily,
                         nsStringArray& aListOfFonts);

    nsresult UpdateFontList();

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

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

    /* Given a string and a font we already have find the font that
     * supports the most code points and most closely resembles aFont
     *
     * this involves looking at the fonts on your machine and seeing which
     * code points they support as well as looking at things like the font
     * family, style, weight, etc.
     */
    FontEntry *FindFontForChar(PRUint32 aCh, gfxWindowsFont *aFont);

    /* Find a FontEntry object that represents a font on your system given a name */
    FontEntry *FindFontEntry(const nsAString& aName);

    PRBool GetPrefFontEntries(const char *aLangGroup, nsTArray<nsRefPtr<FontEntry> > *array);
    void SetPrefFontEntries(const char *aLangGroup, nsTArray<nsRefPtr<FontEntry> >& array);

private:
    void Init();

    static int CALLBACK FontEnumProc(const ENUMLOGFONTEXW *lpelfe,
                                     const NEWTEXTMETRICEXW *metrics,
                                     DWORD fontType, LPARAM data);

    static PLDHashOperator PR_CALLBACK FontGetCMapDataProc(nsStringHashKey::KeyType aKey,
                                                           nsRefPtr<FontEntry>& aFontEntry,
                                                           void* userArg);

    static int CALLBACK FontResolveProc(const ENUMLOGFONTEXW *lpelfe,
                                        const NEWTEXTMETRICEXW *metrics,
                                        DWORD fontType, LPARAM data);

    static PLDHashOperator PR_CALLBACK HashEnumFunc(nsStringHashKey::KeyType aKey,
                                                    nsRefPtr<FontEntry>& aData,
                                                    void* userArg);

    static PLDHashOperator PR_CALLBACK FindFontForCharProc(nsStringHashKey::KeyType aKey,
                                                             nsRefPtr<FontEntry>& aFontEntry,
                                                             void* userArg);

    virtual cmsHPROFILE GetPlatformCMSOutputProfile();

    static int PR_CALLBACK PrefChangedCallback(const char*, void*);

    nsDataHashtable<nsStringHashKey, nsRefPtr<FontEntry> > mFonts;
    nsDataHashtable<nsStringHashKey, nsRefPtr<FontEntry> > mFontAliases;
    nsDataHashtable<nsStringHashKey, nsRefPtr<FontEntry> > mFontSubstitutes;
    nsStringArray mNonExistingFonts;

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

#endif /* GFX_WINDOWS_PLATFORM_H */