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{
This file is part of the Free Pascal run time library.
Copyright (c) 2005 by Armin Diehl
member of the Free Pascal development team
Video unit for netware libc
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.
**********************************************************************}
unit Video;
interface
{$i videoh.inc}
implementation
uses
Libc;
{$i video.inc}
var
MaxVideoBufSize : DWord;
ScreenHandle : scr_t;
CursorIsHidden : boolean;
procedure SysSetCursorType(NewType: Word);
begin
if newType=crHidden then
begin
Libc.DisableInputCursor (ScreenHandle);
cursorIsHidden := true;
end else
begin
cursorIsHidden := false;
case NewType of
crUnderline: Libc.SetCursorStyle (ScreenHandle,CURSOR_NORMAL);
crHalfBlock: Libc.SetCursorStyle (ScreenHandle,CURSOR_TOP);
crBlock : Libc.SetCursorStyle (ScreenHandle,CURSOR_BLOCK);
end;
Libc.EnableInputCursor (ScreenHandle);
end;
end;
procedure SysInitVideo;
VAR height,width,x,y : WORD;
startline, endline : BYTE;
sType,sColorFlag : dword;
begin
DoneVideo;
Libc.ReturnScreenType (sType,sColorFlag);
ScreenColor:= (sColorFlag > 0);
Libc.GetScreenSize(height,width);
ScreenWidth := width;
ScreenHeight:= height;
{ TDrawBuffer only has FVMaxWidth elements
larger values lead to crashes }
if ScreenWidth> FVMaxWidth then
ScreenWidth:=FVMaxWidth;
GetOutputCursorPosition(ScreenHandle,y,x);
CursorX := x;
CursorY := y;
SysSetCursorType (crBlock);
end;
procedure SysDoneVideo;
begin
SetCursorType(crUnderLine);
end;
function SysGetCapabilities: Word;
begin
SysGetCapabilities:=cpColor or cpChangeCursor;
end;
procedure SysSetCursorPos(NewCursorX, NewCursorY: Word);
begin
Libc.PositionInputCursor(ScreenHandle,NewCursorY,NewCursorX);
end;
function SysGetCursorType: Word;
var style : word;
begin
if cursorIsHidden then
begin
SysGetCursorType := crHidden;
exit;
end;
Libc.GetCursorStyle (ScreenHandle,style);
case style of
CURSOR_THICK : SysGetCursorType := crBlock;
CURSOR_BLOCK : SysGetCursorType := crBlock;
CURSOR_TOP : SysGetCursorType := crHalfBlock
else
SysGetCursorType := crUnderline;
end;
end;
procedure SysUpdateScreen(Force: Boolean);
begin
if VideoBuf = nil then
exit;
if (LockUpdateScreen<>0) or (VideoBufSize = 0) then
exit;
if not force then
begin
asm
pushl %esi
pushl %edi
movl VideoBuf,%esi
movl OldVideoBuf,%edi
movl VideoBufSize,%ecx
shrl $2,%ecx
repe
cmpsl
setne force
popl %edi
popl %esi
end;
end;
if Force then
Libc.RestoreScreenArea(ScreenHandle,0,0,ScreenHeight,ScreenWidth,VideoBuf);
end;
Const
SysVideoModeCount = 1;
SysVMD : Array[0..SysVideoModeCount-1] of TVideoMode = (
(Col: 80; Row : 25; Color : True));
Function SysSetVideoMode (Const Mode : TVideoMode) : Boolean;
begin
SysSetVideoMode := ((Mode.Col = 80) AND (Mode.Row = 25) AND (Mode.Color));
end;
Function SysGetVideoModeData (Index : Word; Var Data : TVideoMode) : boolean;
begin
SysGetVideoModeData:=(Index<=SysVideoModeCount);
If SysGetVideoModeData then
Data:=SysVMD[Index];
end;
Function SysGetVideoModeCount : Word;
begin
SysGetVideoModeCount:=SysVideoModeCount;
end;
Const
SysVideoDriver : TVideoDriver = (
InitDriver : @SysInitVideo;
DoneDriver : @SysDoneVideo;
UpdateScreen : @SysUpdateScreen;
ClearScreen : Nil;
SetVideoMode : @SysSetVideoMode;
GetVideoModeCount : @SysGetVideoModeCount;
GetVideoModeData : @SysGetVideoModedata;
SetCursorPos : @SysSetCursorPos;
GetCursorType : @SysGetCursorType;
SetCursorType : @SysSetCursorType;
GetCapabilities : @SysGetCapabilities
);
initialization
VideoBuf := nil;
VideoBufSize := 0;
ScreenHandle := Libc.getscreenhandle;
SetVideoDriver (SysVideoDriver);
end.
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