textfuns.h

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// $Id: textfuns.h 1282 2006-06-09 09:46:49Z alex $
/* @@tag:xara-cn@@ DO NOT MODIFY THIS LINE
================================XARAHEADERSTART===========================
 
               Xara LX, a vector drawing and manipulation program.
                    Copyright (C) 1993-2006 Xara Group Ltd.
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              respective authors. See AUTHORS file for details.

LICENSE TO USE AND MODIFY SOFTWARE
----------------------------------

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=================================XARAHEADEREND============================
 */
// Header for the TextFuns implementation

#ifndef INC_TEXTFUNS
#define INC_TEXTFUNS

#include "fntcache.h"
//#include "pathtype.h" - in camtypes.h [AUTOMATICALLY REMOVED]
//#include "textinfo.h"
class CharDescription;
class DocCoord;


// enums ...
enum CharCase { Failed=0, Lower, Upper, Swap, Read, UnknownType };

// constants
const WCHAR FONTEMCHAR = 'M';   // for finding the width of an 'em' etc

/********************************************************************************************
>   class CharMetrics : public CC_CLASS_MEMDUMP

    Author:     Ed_Cornes (Xara Group Ltd) <camelotdev@xara.com>
    Created:    21/3/95
    Purpose:    parameter passing of char metrics
********************************************************************************************/

class CharMetrics : public CC_CLASS_MEMDUMP
{
    CC_DECLARE_MEMDUMP(CharMetrics);

public:
    CharMetrics();
    void Scale(double ScaleX, double ScaleY);

public:
    MILLIPOINT CharWidth;
    MILLIPOINT FontAscent;
    MILLIPOINT FontDescent;
    MILLIPOINT FontEmWidth;
};

/********************************************************************************************
>   struct MillipointKerningPair

    Author:     Jonathan_Payne (Xara Group Ltd) <camelotdev@xara.com>
    Created:    25/10/2000
    Purpose:    Same as windows structure KERNINGPAIR but using millipoints
********************************************************************************************/
struct MillipointKerningPair
{
    WORD        wFirst; 
    WORD        wSecond; 
    MILLIPOINT  iKernAmount; 
};

/********************************************************************************************
>   struct FontInfo

    Author:     Ed_Cornes (Xara Group Ltd) <camelotdev@xara.com>
    Created:    27/5/95
    Purpose:    parameter passing of info extracted from a LogFont
********************************************************************************************/

struct FontInfo
{
    WORD       Handle;
    MILLIPOINT Size;
    FIXED16    Aspect;
    BOOL       Bold;
    BOOL       Italic;
    ANGLE      Rotation;
};


/********************************************************************************************
>   class TextManager:  public CCObject

    Author:     Mark_Neves (Xara Group Ltd) <camelotdev@xara.com>
    Created:    21/1/95
    Purpose:    You name it and its assocaited with text then this probably isn't it
********************************************************************************************/

class TextManager: public CCObject
{
    //CC_DECLARE_DYNAMIC(TextManager)// not required as this is a static class

public:
    static BOOL GetLogFontFromCharDescriptor(wxDC* pDC, CharDescription& ChDesc, LPLOGFONT pLogFont,
                                                INT32 LogicalHeight=-1);

    static BOOL GetTTCharPath(CharDescription& ChDesc, DocCoord** ppCoords, PathVerb** ppVerbs,
                                                                        UINT32* pNumCoords, wxDC* pDC );

    static BOOL GetBezierFromChar(wxDC* pDC, WCHAR CharNumber, LPLOGFONT pLogFont,
                                  DWORD* NoElements, POINT* pPolyCordBuffer, BYTE* pPolyVerbBuffer);
  
    static CharCase ProcessCharCase(WCHAR* pChar, CharCase NewState);

    static MILLIPOINT GetDefaultHeight() { return 72000; }  // size of char-paths/advance-widths in caches etc

    static BOOL GetInfoFromLogFont(FontInfo* pFontInfo, LOGFONT* pLogFont, FontClass Class=FC_UNDEFINED);

    static INT32 GetDesignSize(wxDC* pDC);

    static BOOL GetCharWidth(    wxDC* pDC, WCHAR FirstChar, WCHAR LastChar, INT32* pCharWidthsBuf);
    static BOOL GetCharABCWidths(wxDC* pDC, WCHAR FirstChar, WCHAR LastChar, ABC* pCharABCWidthsBuf);

    static INT32    GetKernCount(wxDC* pDC);
    static bool FillKernArray(wxDC* pDC, MillipointKerningPair* pKerningPairs, INT32 count);
};

#endif

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