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fpc/fv/gfvgraph.pas

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{ $Id$ }
{********[ SOURCE FILE OF GRAPHICAL FREE VISION ]**********}
{ }
{ System independent GFV GRAPHICS UNIT }
{ }
{ Copyright (c) 1999, 2000 by Leon de Boer }
{ ldeboer@attglobal.net - primary e-mail address }
{ ldeboer@projectent.com.au - backup e-mail address }
{ }
{ This unit provides the interlink between the graphics }
{ used in GFV and the graphics API for the different }
{ operating systems. }
{ }
{****************[ THIS CODE IS FREEWARE ]*****************}
{ }
{ This sourcecode is released for the purpose to }
{ promote the pascal language on all platforms. You may }
{ redistribute it and/or modify with the following }
{ DISCLAIMER. }
{ }
{ This SOURCE CODE is distributed "AS IS" WITHOUT }
{ WARRANTIES AS TO PERFORMANCE OF MERCHANTABILITY OR }
{ ANY OTHER WARRANTIES WHETHER EXPRESSED OR IMPLIED. }
{ }
{*****************[ SUPPORTED PLATFORMS ]******************}
{ 16 and 32 Bit compilers }
{ WINDOWS - Turbo Pascal 7.0 + (16 Bit) }
{ - Delphi 1.0+ (16 Bit) }
{ WIN95/NT - Delphi 2.0+ (32 Bit) }
{ - Virtual Pascal 2.0+ (32 Bit) }
{ - Speedsoft Sybil 2.0+ (32 Bit) }
{ - FPC 0.9912+ (32 Bit) }
{ OS2 - Virtual Pascal 1.0+ (32 Bit) }
{ - Speed Pascal 1.0+ (32 Bit) }
{ }
{*****************[ REVISION HISTORY ]*********************}
{ Version Date Fix }
{ ------- --------- ---------------------------------- }
{ 1.00 26 Nov 99 Unit started from relocated code }
{ originally from views.pas }
{ 1.01 21 May 00 GetMaxX and GetMaxY added. }
{ 1.02 05 Dec 00 Fixed DOS/DPMI implementation. }
{**********************************************************}
UNIT GFVGraph;
{<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>}
INTERFACE
{<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>}
{====Include file to sort compiler platform out =====================}
{$I Platform.inc}
{====================================================================}
{==== Compiler directives ===========================================}
{$IFNDEF PPC_FPC} { FPC doesn't support these switches }
{$F-} { Near far calls are okay }
{$A+} { Word Align Data }
{$B-} { Allow short circuit boolean evaluations }
{$O+} { This unit may be overlaid }
{$G+} { 286 Code optimization - if you're on an 8088 get a real computer }
{$E+} { Emulation is on }
{$N-} { No 80x87 code generation }
{$ENDIF}
{$X+} { Extended syntax is ok }
{$R-} { Disable range checking }
{$S-} { Disable Stack Checking }
{$I-} { Disable IO Checking }
{$Q-} { Disable Overflow Checking }
{$V-} { Turn off strict VAR strings }
{====================================================================}
{$IFDEF GRAPH_API} { GRAPH CODE }
USES Graph; { Standard unit }
{$ENDIF}
{***************************************************************************}
{ PUBLIC CONSTANTS }
{***************************************************************************}
{---------------------------------------------------------------------------}
{ STANDARD COLOUR CONSTANTS }
{---------------------------------------------------------------------------}
CONST
Black = 0; { Black }
Blue = 1; { Blue }
Green = 2; { Green }
Cyan = 3; { Cyan }
Red = 4; { Red }
Magenta = 5; { Magenta }
Brown = 6; { Brown }
LightGray = 7; { Light grey }
DarkGray = 8; { Dark grey }
LightBlue = 9; { Light blue }
LightGreen = 10; { Light green }
LightCyan = 11; { Light cyan }
LightRed = 12; { Light red }
LightMagenta = 13; { Light magenta }
Yellow = 14; { Yellow }
White = 15; { White }
{---------------------------------------------------------------------------}
{ WRITE MODE CONSTANTS }
{---------------------------------------------------------------------------}
CONST
NormalPut = 0; { Normal overwrite }
CopyPut = 0; { Normal put image }
AndPut = 1; { AND colour write }
OrPut = 2; { OR colour write }
XorPut = 3; { XOR colour write }
NotPut = 4; { NOT colour write }
{---------------------------------------------------------------------------}
{ CLIP CONTROL CONSTANTS }
{---------------------------------------------------------------------------}
CONST
ClipOn = True; { Clipping on }
ClipOff = False; { Clipping off }
{---------------------------------------------------------------------------}
{ VIDEO CARD DETECTION CONSTANTS }
{---------------------------------------------------------------------------}
CONST
Detect = 0; { Detect video }
{$IFDEF GRAPH_API} { DOS CODE ONLY }
{---------------------------------------------------------------------------}
{ DOS GRAPHICS SOLID FILL BAR AREA CONSTANT }
{---------------------------------------------------------------------------}
CONST
SolidFill = Graph.SolidFill;
LowAscii : boolean = true;
{$ELSE not GRAPH_API }
CONST
SolidFill = 0;
{$ENDIF not GRAPH_API}
{***************************************************************************}
{ PUBLIC TYPE DEFINITIONS }
{***************************************************************************}
{---------------------------------------------------------------------------}
{ ViewPortType RECORD DEFINITION }
{---------------------------------------------------------------------------}
TYPE
ViewPortType = PACKED RECORD
X1, Y1, X2, Y2: Integer; { Corners of viewport }
Clip : Boolean; { Clip status }
END;
{***************************************************************************}
{ INTERFACE ROUTINES }
{***************************************************************************}
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{ GRAPHICS MODE CONTROL ROUTINES }
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{-SetWriteMode-------------------------------------------------------
Sets the current write mode constant all subsequent draws etc. are
then via the set mode.
26Nov99 LdB
---------------------------------------------------------------------}
PROCEDURE SetWriteMode (Mode: Byte; TextMode: Boolean);
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{ VIEWPORT CONTROL ROUTINES }
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{-GetViewSettings----------------------------------------------------
Returns the current viewport and clip parameters in the variable.
26Nov99 LdB
---------------------------------------------------------------------}
PROCEDURE GetViewSettings (Var CurrentViewPort: ViewPortType; TextMode: Boolean);
{-SetViewPort--------------------------------------------------------
Set the current viewport and clip parameters to that requested.
26Nov99 LdB
---------------------------------------------------------------------}
PROCEDURE SetViewPort (X1, Y1, X2, Y2: Integer; Clip, TextMode: Boolean);
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{ GRAPHICS DEVICE CAPACITY ROUTINES }
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{-GetMaxX------------------------------------------------------------
Returns X coordinate of maximum value that can be entered in any
graphics routine, that is the actual screen width in pixels - 1.
21May2000 LdB
---------------------------------------------------------------------}
FUNCTION GetMaxX (TextMode: Boolean): Integer;
{-GetMaxY------------------------------------------------------------
Returns Y coordinate of maximum value that can be entered in any
graphics routine, that is the actual screen height in pixels - 1.
21May2000 LdB
---------------------------------------------------------------------}
FUNCTION GetMaxY (TextMode: Boolean): Integer;
PROCEDURE SetColor(Color: Word);
PROCEDURE SetFillStyle (Pattern: Word; Color: Word);
PROCEDURE Bar (X1, Y1, X2, Y2: Integer);
PROCEDURE Line(X1, Y1, X2, Y2: Integer);
PROCEDURE Rectangle(X1, Y1, X2, Y2: Integer);
PROCEDURE OutTextXY(X,Y: Integer; TextString: String);
{***************************************************************************}
{ INITIALIZED PUBLIC VARIABLES }
{***************************************************************************}
{---------------------------------------------------------------------------}
{ INITIALIZED DOS/DPMI/WIN/NT/OS2 VARIABLES }
{---------------------------------------------------------------------------}
CONST
WriteMode : Byte = 0; { Current write mode }
SysScreenWidth : Integer = 640; { Default screen width }
SysScreenHeight: Integer = 480; { Default screen height}
{$ifdef DEBUG}
const
WriteDebugInfo : boolean = false;
{$endif DEBUG}
{<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>}
IMPLEMENTATION
{<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>}
{***************************************************************************}
{ PRIVATE INITIALIZED VARIABLES }
{***************************************************************************}
{---------------------------------------------------------------------------}
{ DOS/DPMI/WIN/NT/OS2 INITIALIZED VARIABLES }
{---------------------------------------------------------------------------}
CONST
FillCol : Integer = 0;
Cxp : Integer = 0; { Current x position }
Cyp : Integer = 0; { Current y position }
ViewPort: ViewPortType = (X1:0; Y1:0; X2: 639;
Y2: 479; Clip: True); { Default viewport }
{***************************************************************************}
{ INTERFACE ROUTINES }
{***************************************************************************}
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{ GRAPHICS MODE CONTROL ROUTINES }
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{---------------------------------------------------------------------------}
{ SetWriteMode -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 05Dec2000 LdB }
{---------------------------------------------------------------------------}
PROCEDURE SetWriteMode (Mode: Byte; TextMode: Boolean);
BEGIN
{$IFDEF GRAPH_API} { GRAPH CODE }
If TextMode Then
WriteMode := Mode { Hold write mode }
Else Graph.SetWriteMode(Mode); { Call graph proc }
{$ELSE not GRAPH_API}
WriteMode := Mode; { Hold write mode }
{$ENDIF not GRAPH_API}
END;
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{ VIEW PORT CONTROL ROUTINES }
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{---------------------------------------------------------------------------}
{ GetViewSettings -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 05Dec2000 LdB }
{---------------------------------------------------------------------------}
PROCEDURE GetViewSettings (Var CurrentViewPort: ViewPortType; TextMode: Boolean);
{$IFDEF GRAPH_API}
VAR Ts: Graph.ViewPortType;
{$ENDIF GRAPH_API}
BEGIN
{$IFNDEF GRAPH_API}
CurrentViewPort := ViewPort; { Textmode viewport }
{$ELSE GRAPH_API}
If TextMode Then CurrentViewPort := ViewPort { Textmode viewport }
Else Begin
Graph.GetViewSettings(Ts); { Get graph settings }
CurrentViewPort.X1 := Ts.X1; { Transfer X1 }
CurrentViewPort.Y1 := Ts.Y1; { Transfer Y1 }
CurrentViewPort.X2 := Ts.X2; { Transfer X2 }
CurrentViewPort.Y2 := Ts.Y2; { Transfer Y2 }
CurrentViewPort.Clip := Ts.Clip; { Transfer clip mask }
End;
{$ENDIF GRAPH_API}
END;
{---------------------------------------------------------------------------}
{ SetViewPort -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 05Dec2000 LdB }
{---------------------------------------------------------------------------}
PROCEDURE SetViewPort (X1, Y1, X2, Y2: Integer; Clip, TextMode: Boolean);
BEGIN
{$IFDEF GRAPH_API}
If TextMode Then Begin { TEXT MODE GFV }
{$ENDIF GRAPH_API}
If (X1 < 0) Then X1 := 0; { X1 negative fix }
If (X1 >SysScreenWidth) Then
X1 := SysScreenWidth; { X1 off screen fix }
If (Y1 < 0) Then Y1 := 0; { Y1 negative fix }
If (Y1 > SysScreenHeight) Then
Y1 := SysScreenHeight; { Y1 off screen fix }
If (X2 < 0) Then X2 := 0; { X2 negative fix }
If (X2 > SysScreenWidth) Then
X2 := SysScreenWidth; { X2 off screen fix }
If (Y2 < 0) Then Y2 := 0; { Y2 negative fix }
If (Y2 > SysScreenHeight) Then
Y2 := SysScreenHeight; { Y2 off screen fix }
ViewPort.X1 := X1; { Set X1 port value }
ViewPort.Y1 := Y1; { Set Y1 port value }
ViewPort.X2 := X2; { Set X2 port value }
ViewPort.Y2 := Y2; { Set Y2 port value }
ViewPort.Clip := Clip; { Set port clip value }
{$ifdef DEBUG}
If WriteDebugInfo then
Writeln(stderr,'New ViewPort(',X1,',',Y1,',',X2,',',Y2,')');
{$endif DEBUG}
Cxp := X1; { Set current x pos }
Cyp := Y1; { Set current y pos }
{$IFDEF GRAPH_API}
End Else Begin { GRAPHICS MODE GFV }
Graph.SetViewPort(X1, Y1, X2, Y2, Clip); { Call graph proc }
End;
{$ENDIF GRAPH_API}
END;
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{ GRAPHICS DEVICE CAPACITY ROUTINES }
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{---------------------------------------------------------------------------}
{ GetMaxX - Platforms DOS/DPMI/WIN/NT/OS2 - Updated 05Dec2000 LdB }
{---------------------------------------------------------------------------}
FUNCTION GetMaxX (TextMode: Boolean): Integer;
BEGIN
{$IFDEF GRAPH_API}
If TextMode Then
{$ENDIF GRAPH_API}
GetMaxX := SysScreenWidth-1 { Screen width }
{$IFDEF GRAPH_API}
Else GetMaxX := Graph.GetMaxX; { Call graph func }
{$ENDIF GRAPH_API}
END;
{---------------------------------------------------------------------------}
{ GetMaxY - Platforms DOS/DPMI/WIN/NT/OS2 - Updated 05Dec2000 LdB }
{---------------------------------------------------------------------------}
FUNCTION GetMaxY (TextMode: Boolean): Integer;
BEGIN
{$IFDEF GRAPH_API}
If TextMode Then
{$ENDIF GRAPH_API}
GetMaxY := SysScreenHeight-1 { Screen height }
{$IFDEF GRAPH_API}
Else GetMaxY := Graph.GetMaxY; { Call graph func }
{$ENDIF GRAPH_API}
END;
PROCEDURE SetColor(Color: Word);
BEGIN
{$IFDEF GRAPH_API}
Graph.SetColor(Color); { Call graph proc }
{$ENDIF GRAPH_API}
END;
PROCEDURE SetFillStyle (Pattern: Word; Color: Word);
BEGIN
{$IFDEF GRAPH_API}
Graph.SetFillStyle(Pattern, Color); { Call graph proc }
{$ENDIF GRAPH_API}
END;
PROCEDURE Bar (X1, Y1, X2, Y2: Integer);
BEGIN
{$IFDEF GRAPH_API}
Graph.Bar(X1, Y1, X2, Y2); { Call graph proc }
{$ENDIF GRAPH_API}
END;
PROCEDURE Line(X1, Y1, X2, Y2: Integer);
BEGIN
{$IFDEF GRAPH_API}
Graph.Line(X1, Y1, X2, Y2); { Call graph proc }
{$ENDIF GRAPH_API}
END;
PROCEDURE Rectangle(X1, Y1, X2, Y2: Integer);
BEGIN
{$IFDEF GRAPH_API}
Graph.Rectangle(X1, Y1, X2, Y2); { Call graph proc }
{$ENDIF GRAPH_API}
END;
PROCEDURE OutTextXY(X,Y: Integer; TextString: string);
BEGIN
{$IFDEF GRAPH_API}
Graph.OutTextXY(X, Y, TextString); { Call graph proc }
{$ENDIF GRAPH_API}
END;
END.
{
$Log$
Revision 1.10 2001-10-02 16:35:51 pierre
* fix several problems, try to get the graph version to compile
Revision 1.9 2001/05/31 21:40:10 pierre
* some debug stuff changed
Revision 1.8 2001/05/10 16:46:28 pierre
+ some improovements made
Revision 1.7 2001/05/07 23:36:35 pierre
NO_WINDOW cond removed
Revision 1.6 2001/05/07 22:22:03 pierre
* removed NO_WINDOW cond, added GRAPH_API
Revision 1.5 2001/05/04 15:43:45 pierre
* several more fixes
Revision 1.4 2001/04/10 21:57:55 pierre
+ first adds for Use_API define
Revision 1.3 2001/04/10 21:29:55 pierre
* import of Leon de Boer's files
Revision 1.2 2000/08/24 12:00:21 marco
* CVS log and ID tags
}
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