{
    fpGUI  -  Free Pascal GUI Library

    Copyright (C) 2006 - 2008 See the file AUTHORS.txt, included in this
    distribution, for details of the copyright.

    See the file COPYING.modifiedLGPL, included in this distribution,
    for details about redistributing fpGUI.

    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.

    Description:
      Xft interface functions
}

unit fpg_xft_x11;

{$mode objfpc}{$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.