freepascal.compiler/packages/extra/amunits/units/diskfont.pas

{
    This file is part of the Free Pascal run time library.

    A file in Amiga system run time library.
    Copyright (c) 1998-2003 by Nils Sjoholm
    member of the Amiga RTL development team.

    See the file COPYING.FPC, 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.

 **********************************************************************}
{
    History:

    Added the defines use_amiga_smartlink and
    use_auto_openlib. Implemented autoopening
    of the library.
    13 Jan 2003.

    Update for AmigaOS 3.9.
       FUNCTION GetDiskFontCtrl
       PROCEDURE SetDiskFontCtrlA
    Varargs for SetDiskFontCtrl is in
    systemvartags.
    Changed startup for library.
    01 Feb 2003.

    Changed cardinal > longword.
    09 Feb 2003.

    [email protected] Nils Sjoholm
}

{$I useamigasmartlink.inc}
{$ifdef use_amiga_smartlink}
   {$smartlink on}
{$endif use_amiga_smartlink}

unit diskfont;

INTERFACE

uses exec, graphics,utility;

Const

    MAXFONTPATH         = 256;

Type

    pFontContents = ^tFontContents;
    tFontContents = record
        fc_FileName     : Array [0..MAXFONTPATH-1] of Char;
        fc_YSize        : Word;
        fc_Style        : Byte;
        fc_Flags        : Byte;
    end;


   pTFontContents = ^tTFontContents;
   tTFontContents = record
    tfc_FileName  : Array[0..MAXFONTPATH-3] of Char;
    tfc_TagCount  : Word;

    tfc_YSize     : Word;
    tfc_Style,
    tfc_Flags     : Byte;
   END;


Const

    FCH_ID              = $0f00;
    TFCH_ID             = $0f02;
    OFCH_ID             = $0f03;



Type

    pFontContentsHeader = ^tFontContentsHeader;
    tFontContentsHeader = record
        fch_FileID      : Word;
        fch_NumEntries  : Word;
    end;

Const

    DFH_ID              = $0f80;
    MAXFONTNAME         = 32;

Type

    pDiskFontHeader = ^tDiskFontHeader;
    tDiskFontHeader = record
        dfh_DF          : tNode;
        dfh_FileID      : Word;
        dfh_Revision    : Word;
        dfh_Segment     : Longint;
        dfh_Name        : Array [0..MAXFONTNAME-1] of Char;
        dfh_TF          : tTextFont;
    end;

Const

    AFB_MEMORY          = 0;
    AFF_MEMORY          = 1;
    AFB_DISK            = 1;
    AFF_DISK            = 2;
    AFB_SCALED          = 2;
    AFF_SCALED          = $0004;
    AFB_BITMAP          = 3;
    AFF_BITMAP          = $0008;
    AFB_TAGGED          = 16;
    AFF_TAGGED          = $10000;


Type

    pAvailFonts = ^tAvailFonts;
    tAvailFonts = record
        af_Type         : Word;
        af_Attr         : tTextAttr;
    end;

    pTAvailFonts = ^tTAvailFonts;
    tTAvailFonts = record
        taf_Type        : Word;
        taf_Attr        : tTTextAttr;
    END;

    pAvailFontsHeader = ^tAvailFontsHeader;
    tAvailFontsHeader = record
        afh_NumEntries  : Word;
    end;

const
    DISKFONTNAME : PChar = 'diskfont.library';

VAR DiskfontBase : pLibrary;

FUNCTION AvailFonts(buffer : pCHAR; bufBytes : LONGINT; flags : LONGINT) : LONGINT;
PROCEDURE DisposeFontContents(fontContentsHeader : pFontContentsHeader);
FUNCTION NewFontContents(fontsLock : BPTR; fontName : pCHAR) : pFontContentsHeader;
FUNCTION NewScaledDiskFont(sourceFont : pTextFont; destTextAttr : pTextAttr) : pDiskFontHeader;
FUNCTION OpenDiskFont(textAttr : pTextAttr) : pTextFont;
FUNCTION GetDiskFontCtrl(tagid : LONGINT) : LONGINT;
PROCEDURE SetDiskFontCtrlA(taglist : pTagItem);

{Here we read how to compile this unit}
{You can remove this include and use a define instead}
{$I useautoopenlib.inc}
{$ifdef use_init_openlib}
procedure InitDISKFONTLibrary;
{$endif use_init_openlib}

{This is a variable that knows how the unit is compiled}
var
    DISKFONTIsCompiledHow : longint;

IMPLEMENTATION

{
 If you don't use array of const then just remove tagsarray
}
uses
{$ifndef dont_use_openlib}
msgbox;
{$endif dont_use_openlib}

FUNCTION AvailFonts(buffer : pCHAR; bufBytes : LONGINT; flags : LONGINT) : LONGINT;
BEGIN
  ASM
    MOVE.L  A6,-(A7)
    MOVEA.L buffer,A0
    MOVE.L  bufBytes,D0
    MOVE.L  flags,D1
    MOVEA.L DiskfontBase,A6
    JSR -036(A6)
    MOVEA.L (A7)+,A6
    MOVE.L  D0,@RESULT
  END;
END;

PROCEDURE DisposeFontContents(fontContentsHeader : pFontContentsHeader);
BEGIN
  ASM
    MOVE.L  A6,-(A7)
    MOVEA.L fontContentsHeader,A1
    MOVEA.L DiskfontBase,A6
    JSR -048(A6)
    MOVEA.L (A7)+,A6
  END;
END;

FUNCTION NewFontContents(fontsLock : BPTR; fontName : pCHAR) : pFontContentsHeader;
BEGIN
  ASM
    MOVE.L  A6,-(A7)
    MOVEA.L fontsLock,A0
    MOVEA.L fontName,A1
    MOVEA.L DiskfontBase,A6
    JSR -042(A6)
    MOVEA.L (A7)+,A6
    MOVE.L  D0,@RESULT
  END;
END;

FUNCTION NewScaledDiskFont(sourceFont : pTextFont; destTextAttr : pTextAttr) : pDiskFontHeader;
BEGIN
  ASM
    MOVE.L  A6,-(A7)
    MOVEA.L sourceFont,A0
    MOVEA.L destTextAttr,A1
    MOVEA.L DiskfontBase,A6
    JSR -054(A6)
    MOVEA.L (A7)+,A6
    MOVE.L  D0,@RESULT
  END;
END;

FUNCTION OpenDiskFont(textAttr : pTextAttr) : pTextFont;
BEGIN
  ASM
    MOVE.L  A6,-(A7)
    MOVEA.L textAttr,A0
    MOVEA.L DiskfontBase,A6
    JSR -030(A6)
    MOVEA.L (A7)+,A6
    MOVE.L  D0,@RESULT
  END;
END;

FUNCTION GetDiskFontCtrl(tagid : LONGINT) : LONGINT;
BEGIN
  ASM
        MOVE.L  A6,-(A7)
        MOVE.L  tagid,D0
        MOVEA.L DiskfontBase,A6
        JSR     -060(A6)
        MOVEA.L (A7)+,A6
        MOVE.L  D0,@RESULT
  END;
END;

PROCEDURE SetDiskFontCtrlA(taglist : pTagItem);
BEGIN
  ASM
        MOVE.L  A6,-(A7)
        MOVEA.L taglist,A0
        MOVEA.L DiskfontBase,A6
        JSR     -066(A6)
        MOVEA.L (A7)+,A6
  END;
END;

const
    { Change VERSION and LIBVERSION to proper values }

    VERSION : string[2] = '0';
    LIBVERSION : longword = 0;

{$ifdef use_init_openlib}
  {$Info Compiling initopening of diskfont.library}
  {$Info don't forget to use InitDISKFONTLibrary in the beginning of your program}

var
    diskfont_exit : Pointer;

procedure ClosediskfontLibrary;
begin
    ExitProc := diskfont_exit;
    if DiskfontBase <> nil then begin
        CloseLibrary(DiskfontBase);
        DiskfontBase := nil;
    end;
end;

procedure InitDISKFONTLibrary;
begin
    DiskfontBase := nil;
    DiskfontBase := OpenLibrary(DISKFONTNAME,LIBVERSION);
    if DiskfontBase <> nil then begin
        diskfont_exit := ExitProc;
        ExitProc := @ClosediskfontLibrary;
    end else begin
        MessageBox('FPC Pascal Error',
        'Can''t open diskfont.library version ' + VERSION + #10 +
        'Deallocating resources and closing down',
        'Oops');
        halt(20);
    end;
end;

begin
    DISKFONTIsCompiledHow := 2;
{$endif use_init_openlib}

{$ifdef use_auto_openlib}
  {$Info Compiling autoopening of diskfont.library}

var
    diskfont_exit : Pointer;

procedure ClosediskfontLibrary;
begin
    ExitProc := diskfont_exit;
    if DiskfontBase <> nil then begin
        CloseLibrary(DiskfontBase);
        DiskfontBase := nil;
    end;
end;

begin
    DiskfontBase := nil;
    DiskfontBase := OpenLibrary(DISKFONTNAME,LIBVERSION);
    if DiskfontBase <> nil then begin
        diskfont_exit := ExitProc;
        ExitProc := @ClosediskfontLibrary;
        DISKFONTIsCompiledHow := 1;
    end else begin
        MessageBox('FPC Pascal Error',
        'Can''t open diskfont.library version ' + VERSION + #10 +
        'Deallocating resources and closing down',
        'Oops');
        halt(20);
    end;

{$endif use_auto_openlib}

{$ifdef dont_use_openlib}
begin
    DISKFONTIsCompiledHow := 3;
   {$Warning No autoopening of diskfont.library compiled}
   {$Warning Make sure you open diskfont.library yourself}
{$endif dont_use_openlib}


END. (* UNIT DISKFONT *)