gecko/gfx/thebes/public/gfxDWriteFonts.h

/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
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 * The Original Code is Mozilla Foundation code.
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 * The Initial Developer of the Original Code is Mozilla Foundation.
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 * Contributor(s):
 *   Bas Schouten <bschouten@mozilla.com>
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#ifndef GFX_WINDOWSDWRITEFONTS_H
#define GFX_WINDOWSDWRITEFONTS_H

#include <dwrite.h>

#include "gfxFont.h"
#include "gfxUserFontSet.h"
#include "cairo-win32.h"

/**
 * \brief Class representing a font face for a font entry.
 */
class gfxDWriteFont : public gfxFont 
{
public:
    gfxDWriteFont(gfxFontEntry *aFontEntry,
                  const gfxFontStyle *aFontStyle,
                  PRBool aNeedsBold = PR_FALSE);
    ~gfxDWriteFont();

    virtual nsString GetUniqueName();

    virtual const gfxFont::Metrics& GetMetrics();

    virtual PRUint32 GetSpaceGlyph();

    virtual PRBool SetupCairoFont(gfxContext *aContext);

    virtual PRBool IsValid() { return mFontFace != NULL; }

    gfxFloat GetAdjustedSize() const { return mAdjustedSize; }

protected:
    friend class gfxDWriteFontGroup;

    void ComputeMetrics();

    cairo_font_face_t *CairoFontFace();

    cairo_scaled_font_t *CairoScaledFont();

    nsRefPtr<IDWriteFontFace> mFontFace;
    cairo_font_face_t *mCairoFontFace;
    cairo_scaled_font_t *mCairoScaledFont;

    gfxFloat mAdjustedSize;
    gfxFont::Metrics mMetrics;
    PRBool mNeedsOblique;
};

/**
 * \brief Class representing a DWrite windows font group.
 */
class gfxDWriteFontGroup : public gfxFontGroup 
{
public:
    gfxDWriteFontGroup(const nsAString& aFamilies, 
                              const gfxFontStyle *aStyle,
                              gfxUserFontSet *aUserFontSet);
    virtual ~gfxDWriteFontGroup();
    
    gfxFontGroup *Copy(const gfxFontStyle *aStyle);

    /**
     * Gets the font at a certain position in the font list, it will
     * create this font if it hasn't actually been created yet.
     *
     * \param i Position in the font list
     * \return Object representing the font
     */
    virtual gfxDWriteFont *GetFontAt(PRInt32 i);

    virtual gfxTextRun *MakeTextRun(const PRUnichar *aString, PRUint32 aLength,
                                    const Parameters *aParams, PRUint32 aFlags);
    virtual gfxTextRun *MakeTextRun(const PRUint8 *aString, PRUint32 aLength,
                                    const Parameters *aParams, PRUint32 aFlags);
};

#endif