{
    fpGFX  -  Free Pascal Graphics Library
    Copyright (C) 2006-2007 by Graeme Geldenhuys
      member of the fpGFX development team.

    Xft interface functions

    See the file COPYING.fpGFX, included in this distribution,
    for details about the copyright.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

 **********************************************************************}


unit x11_xft;

{$mode objfpc}{$H+}

{$linklib Xft}

interface
uses
  Classes
  ,SysUtils
  ,X
  ,XLib
  ,Xutil
  ;
  
  
type
  TPicture = longword;

  TXftDraw = record
               dummy : Pointer;
             end;
  PXftDraw = ^TXftDraw;

  TXftFont = record
               ascent   : integer;
               descent  : integer;
               height   : integer;
               max_advance_width : integer;
               ptr1     : Pointer;  // charset
               ptr2     : Pointer;  // pattern
             end;
  PXftFont = ^TXftFont;

  TXRenderColor = record
                    red   : word;
                    green : word;
                    blue  : word;
                    alpha : word;
                  end;

  TXftColor = record
                pixel : ptrint;
                color : TXRenderColor;
              end;
              
  TXGlyphInfo = packed record
                  width   : word;
                  height  : word;
                  x       : smallint;
                  y       : smallint;
                  xOff    : smallint;
                  yOff    : smallint;
                end;

  TFcPattern = record
    dummy : integer;
  end;

  PFcPattern = ^TFcPattern;
  PPFcPattern = ^PFcPattern;

  TFcFontSet = packed record
    nfont : integer;
    sfont : integer;
    fonts : PPFcPattern;
  end;
  PFcFontSet = ^TFcFontSet;

const
  FC_FAMILY  : PChar = 'family';
  FC_SIZE    : PChar = 'size';
  FC_SCALABLE : PChar = 'scalable';

  FcTypeVoid         = 0;
  FcTypeInteger      = 1;
  FcTypeDouble       = 2;
  FcTypeString       = 3;
  FcTypeBool         = 4;
  FcTypeMatrix       = 5;
  FcTypeCharSet      = 6;
  FcTypeFTFace       = 7;
  FcTypeLangSet      = 8;

function XftDrawCreate(display : PXDisplay; win : TXID; vis : PVisual; colorm : longint) : PXftDraw; cdecl;
procedure XftDrawChange(xftd : PXftDraw; win : TXID); cdecl;
procedure XftDrawDestroy(draw : PXftDraw); cdecl;

function XftDrawPicture(draw : PXftDraw) : TPicture; cdecl;

function XftFontOpenName(display : PXDisplay; scr : integer; par3 : PChar) : PXftFont; cdecl;
procedure XftFontClose(display : PXDisplay; fnt : PXftFont); cdecl;

procedure XftDrawStringUtf8(draw : PXftDraw; var col : TXftColor; fnt : PXftFont; x,y : integer; txt : PChar; len : integer); cdecl;
procedure XftDrawString8(draw : PXftDraw; var col : TXftColor; fnt : PXftFont; x,y : integer; txt : PChar; len : integer); cdecl;
procedure XftDrawString16(draw : PXftDraw; var col : TXftColor; fnt : PXftFont; x,y : integer; txt : PChar; len : integer); cdecl;

procedure XftTextExtentsUtf8(display : PXDisplay; fnt : PXftFont; txt : PChar; len : integer; var extents : TXGlyphInfo); cdecl;
procedure XftTextExtents8(display : PXDisplay; fnt : PXftFont; txt : PChar; len : integer; var extents : TXGlyphInfo); cdecl;
procedure XftTextExtents16(display : PXDisplay; fnt : PXftFont; txt : PChar; len : integer; var extents : TXGlyphInfo); cdecl;

//function XftGlyphExists(display : PXDisplay; fnt : PXftFont; ch : integer) : longbool; cdecl;

//procedure XftDrawSetClipRectangles(draw : PXftDraw; xorigin, yorigin : integer; rect : PXRectangle; rnum : integer); cdecl;

procedure XftDrawSetClip(draw : PXftDraw; rg : TRegion); cdecl;

function XftListFonts(display : PXDisplay; screen : integer; params : array of const) : PFcFontSet; cdecl;
function XftNameUnparse(pat : PFcPattern; dest : PChar; destlen : integer) : boolean; cdecl;
procedure FcFontSetDestroy(fsp : PFcFontSet); cdecl;



implementation


function XftDrawCreate(display : PXDisplay; win : TXID; vis : PVisual; colorm : longint) : PXftDraw; cdecl; external;
procedure XftDrawChange(xftd : PXftDraw; win : TXID); cdecl; external;
procedure XftDrawDestroy(draw : PXftDraw); cdecl; external;

function XftDrawPicture(draw : PXftDraw) : TPicture; cdecl; external;

function XftFontOpenName(display : PXDisplay; scr : integer; par3 : PChar) : PXftFont; cdecl; external;
procedure XftFontClose(display : PXDisplay; fnt : PXftFont); cdecl; external;

procedure XftDrawStringUtf8(draw : PXftDraw; var col : TXftColor; fnt : PXftFont; x,y : integer; txt : PChar; len : integer); cdecl; external;
procedure XftDrawString8(draw : PXftDraw; var col : TXftColor; fnt : PXftFont; x,y : integer; txt : PChar; len : integer); cdecl; external;
procedure XftDrawString16(draw : PXftDraw; var col : TXftColor; fnt : PXftFont; x,y : integer; txt : PChar; len : integer); cdecl; external;

procedure XftTextExtentsUtf8(display : PXDisplay; fnt : PXftFont; txt : PChar; len : integer; var extents : TXGlyphInfo); cdecl; external;
procedure XftTextExtents8(display : PXDisplay; fnt : PXftFont; txt : PChar; len : integer; var extents : TXGlyphInfo); cdecl; external;
procedure XftTextExtents16(display : PXDisplay; fnt : PXftFont; txt : PChar; len : integer; var extents : TXGlyphInfo); cdecl; external;

//function XftGlyphExists(display : PXDisplay; fnt : PXftFont; ch : integer) : longbool; cdecl; external;

//procedure XftDrawSetClipRectangles(draw : PXftDraw; xorigin, yorigin : integer; rect : PXRectangle; rnum : integer); cdecl; external;

procedure XftDrawSetClip(draw : PXftDraw; rg : TRegion); cdecl; external;

function XftListFonts(display : PXDisplay; screen : integer; params : array of const) : PFcFontSet; cdecl; external;
function XftNameUnparse(pat : PFcPattern; dest : PChar; destlen : integer) : boolean; cdecl; external;
procedure FcFontSetDestroy(fsp : PFcFontSet); cdecl; external;

end.