/**********************************************************************

Filename    :   GFxFT2Helper.h
Content     :   Helper for FreeType2 font provider.
                Removes dependency on nonpublic headers from GFxFontProviderFT2 
Created     :   3/18/2009
Authors     :   Dmitry Polenur, Maxim Shemanarev

Copyright   :   (c) 2001-2009 Scaleform Corp. All Rights Reserved.

Notes       :   

Licensees may use this file in accordance with the valid Scaleform
Commercial License Agreement provided with the software.

This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING 
THE WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR ANY PURPOSE.

----------------------------------------------------------------------
The code of these classes was taken from the Anti-Grain Geometry
Project and modified for the use by Scaleform. 
Permission to use without restrictions is hereby granted to 
Scaleform Corporation by the author of Anti-Grain Geometry Project.
See http://antigtain.com for details.
**********************************************************************/

#ifndef INC_GFxFT2Helper_H
#define INC_GFxFT2Helper_H

#include "GTypes.h"

class GFxPathPacker;
class GFxShapeBase;

struct GFxFTVector
{
    SInt32 x;
    SInt32 y;
};

struct  GFxFTOutline
{
    SInt16          NContours;      // number of contours in glyph        
    SInt16          NPoints;        // number of points in the glyph      

    GFxFTVector*    Points;         // the outline's points               
    char*		    Tags;           // the points flags                   
    SInt16*         Contours;       // the contour end points             

    int			    Flags;          // outline masks                      

};

// A helper class for GFxFontProviderFT2. Provides functionality to create shapes
// from FreeType's glyphs.
class GFxFT2Helper
{
    enum 
    {
        GFxFTCurveTagOn			= 1,		
        GFxFTCurveTagConic		= 0,
        GFxFTCurveTagCubic		= 2
    };
public:
    static void GSTDCALL cubicToQuadratic(GFxPathPacker& path, 
                                 int hintedGlyphSize, 
                                 UInt fontHeight, 
                                 int x2, int y2, int x3, int y3, int x4, int y4);
    static bool GSTDCALL decomposeGlyphOutline(const GFxFTOutline& outline, GFxShapeBase* shape, UInt fontHeight);

    static GFxShapeBase* GSTDCALL CreateShape(UInt shapePageSize, UInt glyphSize);
    static void GSTDCALL ReleaseShape(GFxShapeBase* shape);

private:
    static inline int GSTDCALL FtToTwips(int v)
    {
        return (v * 20) >> 6;
    }

    static inline int GSTDCALL FtToS1024(int v)
    {
        return v >> 6;
    }

    static inline char GSTDCALL GetCurveTag(char flag)
    {
        return flag & 3;
    }
};

#endif //#ifndef INC_GFxFT2Helper_H