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410 lines
10 KiB
ObjectPascal
410 lines
10 KiB
ObjectPascal
{
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$Id$
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This file is part of the Free Pascal run time library.
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Copyright (c) 1999-2000 by Florian Klaempfl
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member of the Free Pascal development team
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Video unit for Win32
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See the file COPYING.FPC, included in this distribution,
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for details about the copyright.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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**********************************************************************}
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unit Video;
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interface
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{$i videoh.inc}
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implementation
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uses
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windows,dos;
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{$i video.inc}
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var
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OldVideoBuf : PVideoBuf;
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ConsoleInfo : TConsoleScreenBufferInfo;
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ConsoleCursorInfo : TConsoleCursorInfo;
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MaxVideoBufSize : DWord;
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procedure SysInitVideo;
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begin
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ScreenColor:=true;
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GetConsoleScreenBufferInfo(TextRec(Output).Handle, ConsoleInfo);
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GetConsoleCursorInfo(TextRec(Output).Handle, ConsoleCursorInfo);
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with ConsoleInfo.srWindow do
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begin
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ScreenWidth:=right-left+1;
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ScreenHeight:=bottom-top+1;
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end;
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{ srWindow is sometimes bigger then dwMaximumWindowSize
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this led to wrong ScreenWidth and ScreenHeight values PM }
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{ damned: its also sometimes less !! PM }
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with ConsoleInfo.dwMaximumWindowSize do
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begin
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{if ScreenWidth>X then}
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ScreenWidth:=X;
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{if ScreenHeight>Y then}
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ScreenHeight:=Y;
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end;
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{ TDrawBuffer only has FVMaxWidth elements
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larger values lead to crashes }
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if ScreenWidth> FVMaxWidth then
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ScreenWidth:=FVMaxWidth;
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CursorX:=ConsoleInfo.dwCursorPosition.x;
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CursorY:=ConsoleInfo.dwCursorPosition.y;
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if not ConsoleCursorInfo.bvisible then
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CursorLines:=0
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else
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CursorLines:=ConsoleCursorInfo.dwSize;
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{ allocate back buffer }
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MaxVideoBufSize:= ScreenWidth * ScreenHeight * 2;
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VideoBufSize:=ScreenWidth*ScreenHeight*2;
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GetMem(VideoBuf,MaxVideoBufSize);
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GetMem(OldVideoBuf,MaxVideoBufSize);
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end;
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procedure SysDoneVideo;
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begin
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SetCursorType(crUnderLine);
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FreeMem(VideoBuf,MaxVideoBufSize);
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FreeMem(OldVideoBuf,MaxVideoBufSize);
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VideoBufSize:=0;
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VideoInitialized:=false;
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end;
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function SysGetCapabilities: Word;
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begin
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SysGetCapabilities:=cpColor or cpChangeCursor;
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end;
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procedure SysSetCursorPos(NewCursorX, NewCursorY: Word);
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var
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pos : COORD;
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begin
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pos.x:=NewCursorX;
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pos.y:=NewCursorY;
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SetConsoleCursorPosition(TextRec(Output).Handle,pos);
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CursorX:=pos.x;
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CursorY:=pos.y;
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end;
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function SysGetCursorType: Word;
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begin
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GetConsoleCursorInfo(TextRec(Output).Handle,ConsoleCursorInfo);
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if not ConsoleCursorInfo.bvisible then
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SysGetCursorType:=crHidden
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else
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case ConsoleCursorInfo.dwSize of
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1..30:
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SysGetCursorType:=crUnderline;
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31..70:
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SysGetCursorType:=crHalfBlock;
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71..100:
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SysGetCursorType:=crBlock;
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end;
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end;
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procedure SysSetCursorType(NewType: Word);
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begin
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GetConsoleCursorInfo(TextRec(Output).Handle,ConsoleCursorInfo);
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if newType=crHidden then
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ConsoleCursorInfo.bvisible:=false
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else
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begin
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ConsoleCursorInfo.bvisible:=true;
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case NewType of
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crUnderline:
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ConsoleCursorInfo.dwSize:=10;
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crHalfBlock:
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ConsoleCursorInfo.dwSize:=50;
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crBlock:
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ConsoleCursorInfo.dwSize:=99;
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end
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end;
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SetConsoleCursorInfo(TextRec(Output).Handle,ConsoleCursorInfo);
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end;
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function DefaultVideoModeSelector(const VideoMode: TVideoMode; Params: Longint): Boolean;
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begin
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DefaultVideoModeSelector:=true;
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end;
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procedure SysClearScreen;
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begin
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FillWord(VideoBuf^,VideoBufSize div 2,$0720);
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UpdateScreen(true);
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end;
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{$IFDEF FPC}
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function WriteConsoleOutput(hConsoleOutput:HANDLE; lpBuffer:pointer; dwBufferSize:COORD; dwBufferCoord:COORD;
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var lpWriteRegion:SMALL_RECT):WINBOOL; external 'kernel32' name 'WriteConsoleOutputA';
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{$ENDIF}
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procedure SysUpdateScreen(Force: Boolean);
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type TmpRec = Array[0..(1024*32) - 1] of TCharInfo;
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type WordRec = record
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One, Two: Byte;
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end; { wordrec }
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var
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BufSize,
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BufCoord : COORD;
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WriteRegion : SMALL_RECT;
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LineBuf : ^TmpRec;
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BufCounter : Longint;
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LineCounter,
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ColCounter : Longint;
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smallforce : boolean;
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(*
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begin
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if LockUpdateScreen<>0 then
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exit;
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if not force then
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begin
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asm
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movl VideoBuf,%esi
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movl OldVideoBuf,%edi
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movl VideoBufSize,%ecx
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shrl $2,%ecx
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repe
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cmpsl
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setne force
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end;
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end;
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if Force then
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begin
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BufSize.X := ScreenWidth;
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BufSize.Y := ScreenHeight;
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BufCoord.X := 0;
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BufCoord.Y := 0;
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with WriteRegion do
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begin
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Top :=0;
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Left :=0;
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Bottom := ScreenHeight-1;
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Right := ScreenWidth-1;
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end;
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New(LineBuf);
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BufCounter := 0;
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for LineCounter := 1 to ScreenHeight do
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begin
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for ColCounter := 1 to ScreenWidth do
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begin
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LineBuf^[BufCounter].UniCodeChar := Widechar(WordRec(VideoBuf^[BufCounter]).One);
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LineBuf^[BufCounter].Attributes := WordRec(VideoBuf^[BufCounter]).Two;
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Inc(BufCounter);
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end; { for }
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end; { for }
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WriteConsoleOutput(TextRec(Output).Handle, LineBuf, BufSize, BufCoord, WriteRegion);
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Dispose(LineBuf);
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move(VideoBuf^,OldVideoBuf^,VideoBufSize);
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end;
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end;
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*)
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var
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x1,y1,x2,y2 : longint;
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begin
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if force then
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smallforce:=true
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else
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begin
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asm
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movl VideoBuf,%esi
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movl OldVideoBuf,%edi
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movl VideoBufSize,%ecx
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shrl $2,%ecx
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repe
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cmpsl
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orl %ecx,%ecx
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jz .Lno_update
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movb $1,smallforce
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.Lno_update:
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end;
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end;
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if SmallForce then
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begin
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BufSize.X := ScreenWidth;
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BufSize.Y := ScreenHeight;
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BufCoord.X := 0;
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BufCoord.Y := 0;
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with WriteRegion do
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begin
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Top :=0;
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Left :=0;
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Bottom := ScreenHeight-1;
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Right := ScreenWidth-1;
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end;
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New(LineBuf);
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BufCounter := 0;
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x1:=ScreenWidth+1;
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x2:=-1;
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y1:=ScreenHeight+1;
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y2:=-1;
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for LineCounter := 1 to ScreenHeight do
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begin
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for ColCounter := 1 to ScreenWidth do
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begin
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if (WordRec(VideoBuf^[BufCounter]).One<>WordRec(OldVideoBuf^[BufCounter]).One) or
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(WordRec(VideoBuf^[BufCounter]).Two<>WordRec(OldVideoBuf^[BufCounter]).Two) then
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begin
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if ColCounter<x1 then
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x1:=ColCounter;
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if ColCounter>x2 then
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x2:=ColCounter;
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if LineCounter<y1 then
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y1:=LineCounter;
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if LineCounter>y2 then
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y2:=LineCounter;
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end;
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{$ifdef HASWIDECHAR}
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{$ifdef VER1_0}
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LineBuf^[BufCounter].UniCodeChar := WordRec(VideoBuf^[BufCounter]).One;
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{$else}
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LineBuf^[BufCounter].UniCodeChar := Widechar(WordRec(VideoBuf^[BufCounter]).One);
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{$endif}
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{$else}
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LineBuf^[BufCounter].UniCodeChar := WordRec(VideoBuf^[BufCounter]).One);
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{$endif}
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{ If (WordRec(VideoBuf^[BufCounter]).Two and $80)<>0 then
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LineBuf^[BufCounter].Attributes := $100+WordRec(VideoBuf^[BufCounter]).Two
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else }
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LineBuf^[BufCounter].Attributes := WordRec(VideoBuf^[BufCounter]).Two;
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Inc(BufCounter);
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end; { for }
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end; { for }
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BufSize.X := ScreenWidth;
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BufSize.Y := ScreenHeight;
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with WriteRegion do
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begin
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if force then
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begin
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Top := 0;
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Left :=0;
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Bottom := ScreenHeight-1;
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Right := ScreenWidth-1;
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BufCoord.X := 0;
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BufCoord.Y := 0;
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end
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else
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begin
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Top := y1-1;
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Left :=x1-1;
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Bottom := y2-1;
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Right := x2-1;
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BufCoord.X := x1-1;
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BufCoord.Y := y1-1;
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end;
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end;
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{
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writeln('X1: ',x1);
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writeln('Y1: ',y1);
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writeln('X2: ',x2);
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writeln('Y2: ',y2);
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}
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WriteConsoleOutput(TextRec(Output).Handle, LineBuf, BufSize, BufCoord, WriteRegion);
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Dispose(LineBuf);
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move(VideoBuf^,OldVideoBuf^,VideoBufSize);
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end;
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end;
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procedure RegisterVideoModes;
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begin
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{ don't know what to do for win32 (FK) }
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RegisterVideoMode(80, 25, True, @DefaultVideoModeSelector, $00000003);
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end;
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Const
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SysVideoDriver : TVideoDriver = (
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InitDriver : @SysInitVideo;
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DoneDriver : @SysDoneVideo;
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UpdateScreen : @SysUpdateScreen;
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ClearScreen : @SysClearScreen;
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SetVideoMode : Nil;
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HasVideoMode : Nil;
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SetCursorPos : @SysSetCursorPos;
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GetCursorType : @SysGetCursorType;
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SetCursorType : @SysSetCursorType;
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GetCapabilities : @SysGetCapabilities
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);
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initialization
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SetVideoDriver(SysVideoDriver);
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RegisterVideoModes;
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finalization
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UnRegisterVideoModes;
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end.
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{
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$Log$
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Revision 1.6 2001-09-21 19:50:19 michael
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+ Merged driver support from fixbranch
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Revision 1.5 2001/08/01 18:01:20 peter
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* WChar fix to compile also with 1.0.x
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Revision 1.4 2001/07/30 15:01:12 marco
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* Fixed wchar=word to widechar conversion
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Revision 1.3 2001/06/13 18:32:55 peter
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* fixed crash within donevideo (merged)
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Revision 1.2 2001/04/10 21:28:36 peter
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* removed warnigns
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Revision 1.1.2.5 2001/09/21 18:42:09 michael
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+ Implemented support for custom video drivers.
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Revision 1.1.2.4 2001/06/12 22:34:20 pierre
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* avoid crash at exit of IDE
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Revision 1.1.2.3 2001/04/10 20:33:04 peter
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* remove some warnings
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Revision 1.1.2.2 2001/04/02 13:29:41 pierre
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* avoid crash if DoneVideo called twice
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Revision 1.1.2.1 2001/01/30 21:52:03 peter
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* moved api utils to rtl
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Revision 1.1 2001/01/13 11:03:59 peter
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* API 2 RTL commit
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}
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