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|
{
This file is part of the Free Pascal run time library.
Copyright (c) 1999-2000 by Florian Klaempfl
member of the Free Pascal development team
Video unit for Win32
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
{$i videoh.inc}
const
useunicodefunctions : boolean = false;
implementation
uses
windows,dos;
{$i video.inc}
type
tunicodecharmappingflag = (umf_noinfo,umf_leadbyte,umf_undefined,
umf_unused);
punicodecharmapping = ^tunicodecharmapping;
tunicodecharmapping = record
unicode : word;
flag : tunicodecharmappingflag;
reserved : byte;
end;
const
mapcp850 : array[0..255] of tunicodecharmapping = (
(unicode : 0; flag : umf_noinfo; reserved : 0),
(unicode : 1; flag : umf_noinfo; reserved : 0),
(unicode : 2; flag : umf_noinfo; reserved : 0),
(unicode : 3; flag : umf_noinfo; reserved : 0),
(unicode : 4; flag : umf_noinfo; reserved : 0),
(unicode : 5; flag : umf_noinfo; reserved : 0),
(unicode : 6; flag : umf_noinfo; reserved : 0),
(unicode : 7; flag : umf_noinfo; reserved : 0),
(unicode : 8; flag : umf_noinfo; reserved : 0),
(unicode : 9; flag : umf_noinfo; reserved : 0),
(unicode : 10; flag : umf_noinfo; reserved : 0),
(unicode : 11; flag : umf_noinfo; reserved : 0),
(unicode : 12; flag : umf_noinfo; reserved : 0),
(unicode : 13; flag : umf_noinfo; reserved : 0),
(unicode : 14; flag : umf_noinfo; reserved : 0),
(unicode : 15; flag : umf_noinfo; reserved : 0),
(unicode : 16; flag : umf_noinfo; reserved : 0),
(unicode : 17; flag : umf_noinfo; reserved : 0),
(unicode : 18; flag : umf_noinfo; reserved : 0),
(unicode : 19; flag : umf_noinfo; reserved : 0),
(unicode : 20; flag : umf_noinfo; reserved : 0),
(unicode : 21; flag : umf_noinfo; reserved : 0),
(unicode : 22; flag : umf_noinfo; reserved : 0),
(unicode : 23; flag : umf_noinfo; reserved : 0),
(unicode : 24; flag : umf_noinfo; reserved : 0),
(unicode : 25; flag : umf_noinfo; reserved : 0),
(unicode : 26; flag : umf_noinfo; reserved : 0),
(unicode : 27; flag : umf_noinfo; reserved : 0),
(unicode : 28; flag : umf_noinfo; reserved : 0),
(unicode : 29; flag : umf_noinfo; reserved : 0),
(unicode : 30; flag : umf_noinfo; reserved : 0),
(unicode : 31; flag : umf_noinfo; reserved : 0),
(unicode : 32; flag : umf_noinfo; reserved : 0),
(unicode : 33; flag : umf_noinfo; reserved : 0),
(unicode : 34; flag : umf_noinfo; reserved : 0),
(unicode : 35; flag : umf_noinfo; reserved : 0),
(unicode : 36; flag : umf_noinfo; reserved : 0),
(unicode : 37; flag : umf_noinfo; reserved : 0),
(unicode : 38; flag : umf_noinfo; reserved : 0),
(unicode : 39; flag : umf_noinfo; reserved : 0),
(unicode : 40; flag : umf_noinfo; reserved : 0),
(unicode : 41; flag : umf_noinfo; reserved : 0),
(unicode : 42; flag : umf_noinfo; reserved : 0),
(unicode : 43; flag : umf_noinfo; reserved : 0),
(unicode : 44; flag : umf_noinfo; reserved : 0),
(unicode : 45; flag : umf_noinfo; reserved : 0),
(unicode : 46; flag : umf_noinfo; reserved : 0),
(unicode : 47; flag : umf_noinfo; reserved : 0),
(unicode : 48; flag : umf_noinfo; reserved : 0),
(unicode : 49; flag : umf_noinfo; reserved : 0),
(unicode : 50; flag : umf_noinfo; reserved : 0),
(unicode : 51; flag : umf_noinfo; reserved : 0),
(unicode : 52; flag : umf_noinfo; reserved : 0),
(unicode : 53; flag : umf_noinfo; reserved : 0),
(unicode : 54; flag : umf_noinfo; reserved : 0),
(unicode : 55; flag : umf_noinfo; reserved : 0),
(unicode : 56; flag : umf_noinfo; reserved : 0),
(unicode : 57; flag : umf_noinfo; reserved : 0),
(unicode : 58; flag : umf_noinfo; reserved : 0),
(unicode : 59; flag : umf_noinfo; reserved : 0),
(unicode : 60; flag : umf_noinfo; reserved : 0),
(unicode : 61; flag : umf_noinfo; reserved : 0),
(unicode : 62; flag : umf_noinfo; reserved : 0),
(unicode : 63; flag : umf_noinfo; reserved : 0),
(unicode : 64; flag : umf_noinfo; reserved : 0),
(unicode : 65; flag : umf_noinfo; reserved : 0),
(unicode : 66; flag : umf_noinfo; reserved : 0),
(unicode : 67; flag : umf_noinfo; reserved : 0),
(unicode : 68; flag : umf_noinfo; reserved : 0),
(unicode : 69; flag : umf_noinfo; reserved : 0),
(unicode : 70; flag : umf_noinfo; reserved : 0),
(unicode : 71; flag : umf_noinfo; reserved : 0),
(unicode : 72; flag : umf_noinfo; reserved : 0),
(unicode : 73; flag : umf_noinfo; reserved : 0),
(unicode : 74; flag : umf_noinfo; reserved : 0),
(unicode : 75; flag : umf_noinfo; reserved : 0),
(unicode : 76; flag : umf_noinfo; reserved : 0),
(unicode : 77; flag : umf_noinfo; reserved : 0),
(unicode : 78; flag : umf_noinfo; reserved : 0),
(unicode : 79; flag : umf_noinfo; reserved : 0),
(unicode : 80; flag : umf_noinfo; reserved : 0),
(unicode : 81; flag : umf_noinfo; reserved : 0),
(unicode : 82; flag : umf_noinfo; reserved : 0),
(unicode : 83; flag : umf_noinfo; reserved : 0),
(unicode : 84; flag : umf_noinfo; reserved : 0),
(unicode : 85; flag : umf_noinfo; reserved : 0),
(unicode : 86; flag : umf_noinfo; reserved : 0),
(unicode : 87; flag : umf_noinfo; reserved : 0),
(unicode : 88; flag : umf_noinfo; reserved : 0),
(unicode : 89; flag : umf_noinfo; reserved : 0),
(unicode : 90; flag : umf_noinfo; reserved : 0),
(unicode : 91; flag : umf_noinfo; reserved : 0),
(unicode : 92; flag : umf_noinfo; reserved : 0),
(unicode : 93; flag : umf_noinfo; reserved : 0),
(unicode : 94; flag : umf_noinfo; reserved : 0),
(unicode : 95; flag : umf_noinfo; reserved : 0),
(unicode : 96; flag : umf_noinfo; reserved : 0),
(unicode : 97; flag : umf_noinfo; reserved : 0),
(unicode : 98; flag : umf_noinfo; reserved : 0),
(unicode : 99; flag : umf_noinfo; reserved : 0),
(unicode : 100; flag : umf_noinfo; reserved : 0),
(unicode : 101; flag : umf_noinfo; reserved : 0),
(unicode : 102; flag : umf_noinfo; reserved : 0),
(unicode : 103; flag : umf_noinfo; reserved : 0),
(unicode : 104; flag : umf_noinfo; reserved : 0),
(unicode : 105; flag : umf_noinfo; reserved : 0),
(unicode : 106; flag : umf_noinfo; reserved : 0),
(unicode : 107; flag : umf_noinfo; reserved : 0),
(unicode : 108; flag : umf_noinfo; reserved : 0),
(unicode : 109; flag : umf_noinfo; reserved : 0),
(unicode : 110; flag : umf_noinfo; reserved : 0),
(unicode : 111; flag : umf_noinfo; reserved : 0),
(unicode : 112; flag : umf_noinfo; reserved : 0),
(unicode : 113; flag : umf_noinfo; reserved : 0),
(unicode : 114; flag : umf_noinfo; reserved : 0),
(unicode : 115; flag : umf_noinfo; reserved : 0),
(unicode : 116; flag : umf_noinfo; reserved : 0),
(unicode : 117; flag : umf_noinfo; reserved : 0),
(unicode : 118; flag : umf_noinfo; reserved : 0),
(unicode : 119; flag : umf_noinfo; reserved : 0),
(unicode : 120; flag : umf_noinfo; reserved : 0),
(unicode : 121; flag : umf_noinfo; reserved : 0),
(unicode : 122; flag : umf_noinfo; reserved : 0),
(unicode : 123; flag : umf_noinfo; reserved : 0),
(unicode : 124; flag : umf_noinfo; reserved : 0),
(unicode : 125; flag : umf_noinfo; reserved : 0),
(unicode : 126; flag : umf_noinfo; reserved : 0),
(unicode : 127; flag : umf_noinfo; reserved : 0),
(unicode : 199; flag : umf_noinfo; reserved : 0),
(unicode : 252; flag : umf_noinfo; reserved : 0),
(unicode : 233; flag : umf_noinfo; reserved : 0),
(unicode : 226; flag : umf_noinfo; reserved : 0),
(unicode : 228; flag : umf_noinfo; reserved : 0),
(unicode : 224; flag : umf_noinfo; reserved : 0),
(unicode : 229; flag : umf_noinfo; reserved : 0),
(unicode : 231; flag : umf_noinfo; reserved : 0),
(unicode : 234; flag : umf_noinfo; reserved : 0),
(unicode : 235; flag : umf_noinfo; reserved : 0),
(unicode : 232; flag : umf_noinfo; reserved : 0),
(unicode : 239; flag : umf_noinfo; reserved : 0),
(unicode : 238; flag : umf_noinfo; reserved : 0),
(unicode : 236; flag : umf_noinfo; reserved : 0),
(unicode : 196; flag : umf_noinfo; reserved : 0),
(unicode : 197; flag : umf_noinfo; reserved : 0),
(unicode : 201; flag : umf_noinfo; reserved : 0),
(unicode : 230; flag : umf_noinfo; reserved : 0),
(unicode : 198; flag : umf_noinfo; reserved : 0),
(unicode : 244; flag : umf_noinfo; reserved : 0),
(unicode : 246; flag : umf_noinfo; reserved : 0),
(unicode : 242; flag : umf_noinfo; reserved : 0),
(unicode : 251; flag : umf_noinfo; reserved : 0),
(unicode : 249; flag : umf_noinfo; reserved : 0),
(unicode : 255; flag : umf_noinfo; reserved : 0),
(unicode : 214; flag : umf_noinfo; reserved : 0),
(unicode : 220; flag : umf_noinfo; reserved : 0),
(unicode : 248; flag : umf_noinfo; reserved : 0),
(unicode : 163; flag : umf_noinfo; reserved : 0),
(unicode : 216; flag : umf_noinfo; reserved : 0),
(unicode : 215; flag : umf_noinfo; reserved : 0),
(unicode : 402; flag : umf_noinfo; reserved : 0),
(unicode : 225; flag : umf_noinfo; reserved : 0),
(unicode : 237; flag : umf_noinfo; reserved : 0),
(unicode : 243; flag : umf_noinfo; reserved : 0),
(unicode : 250; flag : umf_noinfo; reserved : 0),
(unicode : 241; flag : umf_noinfo; reserved : 0),
(unicode : 209; flag : umf_noinfo; reserved : 0),
(unicode : 170; flag : umf_noinfo; reserved : 0),
(unicode : 186; flag : umf_noinfo; reserved : 0),
(unicode : 191; flag : umf_noinfo; reserved : 0),
(unicode : 174; flag : umf_noinfo; reserved : 0),
(unicode : 172; flag : umf_noinfo; reserved : 0),
(unicode : 189; flag : umf_noinfo; reserved : 0),
(unicode : 188; flag : umf_noinfo; reserved : 0),
(unicode : 161; flag : umf_noinfo; reserved : 0),
(unicode : 171; flag : umf_noinfo; reserved : 0),
(unicode : 187; flag : umf_noinfo; reserved : 0),
(unicode : 9617; flag : umf_noinfo; reserved : 0),
(unicode : 9618; flag : umf_noinfo; reserved : 0),
(unicode : 9619; flag : umf_noinfo; reserved : 0),
(unicode : 9474; flag : umf_noinfo; reserved : 0),
(unicode : 9508; flag : umf_noinfo; reserved : 0),
(unicode : 193; flag : umf_noinfo; reserved : 0),
(unicode : 194; flag : umf_noinfo; reserved : 0),
(unicode : 192; flag : umf_noinfo; reserved : 0),
(unicode : 169; flag : umf_noinfo; reserved : 0),
(unicode : 9571; flag : umf_noinfo; reserved : 0),
(unicode : 9553; flag : umf_noinfo; reserved : 0),
(unicode : 9559; flag : umf_noinfo; reserved : 0),
(unicode : 9565; flag : umf_noinfo; reserved : 0),
(unicode : 162; flag : umf_noinfo; reserved : 0),
(unicode : 165; flag : umf_noinfo; reserved : 0),
(unicode : 9488; flag : umf_noinfo; reserved : 0),
(unicode : 9492; flag : umf_noinfo; reserved : 0),
(unicode : 9524; flag : umf_noinfo; reserved : 0),
(unicode : 9516; flag : umf_noinfo; reserved : 0),
(unicode : 9500; flag : umf_noinfo; reserved : 0),
(unicode : 9472; flag : umf_noinfo; reserved : 0),
(unicode : 9532; flag : umf_noinfo; reserved : 0),
(unicode : 227; flag : umf_noinfo; reserved : 0),
(unicode : 195; flag : umf_noinfo; reserved : 0),
(unicode : 9562; flag : umf_noinfo; reserved : 0),
(unicode : 9556; flag : umf_noinfo; reserved : 0),
(unicode : 9577; flag : umf_noinfo; reserved : 0),
(unicode : 9574; flag : umf_noinfo; reserved : 0),
(unicode : 9568; flag : umf_noinfo; reserved : 0),
(unicode : 9552; flag : umf_noinfo; reserved : 0),
(unicode : 9580; flag : umf_noinfo; reserved : 0),
(unicode : 164; flag : umf_noinfo; reserved : 0),
(unicode : 240; flag : umf_noinfo; reserved : 0),
(unicode : 208; flag : umf_noinfo; reserved : 0),
(unicode : 202; flag : umf_noinfo; reserved : 0),
(unicode : 203; flag : umf_noinfo; reserved : 0),
(unicode : 200; flag : umf_noinfo; reserved : 0),
(unicode : 305; flag : umf_noinfo; reserved : 0),
(unicode : 205; flag : umf_noinfo; reserved : 0),
(unicode : 206; flag : umf_noinfo; reserved : 0),
(unicode : 207; flag : umf_noinfo; reserved : 0),
(unicode : 9496; flag : umf_noinfo; reserved : 0),
(unicode : 9484; flag : umf_noinfo; reserved : 0),
(unicode : 9608; flag : umf_noinfo; reserved : 0),
(unicode : 9604; flag : umf_noinfo; reserved : 0),
(unicode : 166; flag : umf_noinfo; reserved : 0),
(unicode : 204; flag : umf_noinfo; reserved : 0),
(unicode : 9600; flag : umf_noinfo; reserved : 0),
(unicode : 211; flag : umf_noinfo; reserved : 0),
(unicode : 223; flag : umf_noinfo; reserved : 0),
(unicode : 212; flag : umf_noinfo; reserved : 0),
(unicode : 210; flag : umf_noinfo; reserved : 0),
(unicode : 245; flag : umf_noinfo; reserved : 0),
(unicode : 213; flag : umf_noinfo; reserved : 0),
(unicode : 181; flag : umf_noinfo; reserved : 0),
(unicode : 254; flag : umf_noinfo; reserved : 0),
(unicode : 222; flag : umf_noinfo; reserved : 0),
(unicode : 218; flag : umf_noinfo; reserved : 0),
(unicode : 219; flag : umf_noinfo; reserved : 0),
(unicode : 217; flag : umf_noinfo; reserved : 0),
(unicode : 253; flag : umf_noinfo; reserved : 0),
(unicode : 221; flag : umf_noinfo; reserved : 0),
(unicode : 175; flag : umf_noinfo; reserved : 0),
(unicode : 180; flag : umf_noinfo; reserved : 0),
(unicode : 173; flag : umf_noinfo; reserved : 0),
(unicode : 177; flag : umf_noinfo; reserved : 0),
(unicode : 8215; flag : umf_noinfo; reserved : 0),
(unicode : 190; flag : umf_noinfo; reserved : 0),
(unicode : 182; flag : umf_noinfo; reserved : 0),
(unicode : 167; flag : umf_noinfo; reserved : 0),
(unicode : 247; flag : umf_noinfo; reserved : 0),
(unicode : 184; flag : umf_noinfo; reserved : 0),
(unicode : 176; flag : umf_noinfo; reserved : 0),
(unicode : 168; flag : umf_noinfo; reserved : 0),
(unicode : 183; flag : umf_noinfo; reserved : 0),
(unicode : 185; flag : umf_noinfo; reserved : 0),
(unicode : 179; flag : umf_noinfo; reserved : 0),
(unicode : 178; flag : umf_noinfo; reserved : 0),
(unicode : 9632; flag : umf_noinfo; reserved : 0),
(unicode : 160; flag : umf_noinfo; reserved : 0)
);
const
LastCursorType: word = crUnderline;
OrigScreen: PVideoBuf = nil;
OrigScreenSize: cardinal = 0;
var ConsoleInfo : TConsoleScreenBufferInfo;
ConsoleCursorInfo : TConsoleCursorInfo;
OrigCP: cardinal;
OrigConsoleCursorInfo : TConsoleCursorInfo;
OrigConsoleInfo : TConsoleScreenBufferInfo;
procedure SysInitVideo;
begin
ScreenColor:=true;
GetConsoleScreenBufferInfo(TextRec(Output).Handle, OrigConsoleInfo);
GetConsoleCursorInfo(TextRec(Output).Handle, OrigConsoleCursorInfo);
OrigCP := GetConsoleCP;
ConsoleInfo:=OrigConsoleInfo;
ConsoleCursorInfo:=OrigConsoleCursorInfo;
{
About the ConsoleCursorInfo record: There are 3 possible
structures in it that can be regarded as the 'screen':
- dwsize : contains the cols & row in current screen buffer.
- srwindow : Coordinates (relative to buffer) of upper left
& lower right corners of visible console.
- dmMaximumWindowSize : Maximal size of Screen buffer.
The first implementation of video used srWindow. After some
bug-reports, this was switched to dwMaximumWindowSize.
}
with ConsoleInfo.dwMaximumWindowSize do
begin
ScreenWidth:=X;
ScreenHeight:=Y;
end;
{ TDrawBuffer only has FVMaxWidth elements
larger values lead to crashes }
if ScreenWidth> FVMaxWidth then
ScreenWidth:=FVMaxWidth;
CursorX:=ConsoleInfo.dwCursorPosition.x;
CursorY:=ConsoleInfo.dwCursorPosition.y;
if not ConsoleCursorInfo.bvisible then
CursorLines:=0
else
CursorLines:=ConsoleCursorInfo.dwSize;
end;
procedure SysDoneVideo;
begin
SetConsoleScreenBufferSize (TextRec (Output).Handle, OrigConsoleInfo.dwSize);
SetConsoleWindowInfo (cardinal (TextRec (Output).Handle), true, OrigConsoleInfo.srWindow);
SetConsoleCursorInfo(TextRec(Output).Handle, OrigConsoleCursorInfo);
SetConsoleCP(OrigCP);
end;
function SysGetCapabilities: Word;
begin
SysGetCapabilities:=cpColor or cpChangeCursor;
end;
procedure SysSetCursorPos(NewCursorX, NewCursorY: Word);
var
pos : COORD;
begin
pos.x:=NewCursorX;
pos.y:=NewCursorY;
SetConsoleCursorPosition(TextRec(Output).Handle,pos);
CursorX:=pos.x;
CursorY:=pos.y;
end;
function SysGetCursorType: Word;
begin
GetConsoleCursorInfo(TextRec(Output).Handle,ConsoleCursorInfo);
if not ConsoleCursorInfo.bvisible then
SysGetCursorType:=crHidden
else
case ConsoleCursorInfo.dwSize of
1..30:
SysGetCursorType:=crUnderline;
31..70:
SysGetCursorType:=crHalfBlock;
71..100:
SysGetCursorType:=crBlock;
end;
end;
procedure SysSetCursorType(NewType: Word);
begin
GetConsoleCursorInfo(TextRec(Output).Handle,ConsoleCursorInfo);
if newType=crHidden then
ConsoleCursorInfo.bvisible:=false
else
begin
ConsoleCursorInfo.bvisible:=true;
case NewType of
crUnderline:
ConsoleCursorInfo.dwSize:=10;
crHalfBlock:
ConsoleCursorInfo.dwSize:=50;
crBlock:
ConsoleCursorInfo.dwSize:=99;
end
end;
SetConsoleCursorInfo(TextRec(Output).Handle,ConsoleCursorInfo);
end;
function SysVideoModeSelector (const VideoMode: TVideoMode): boolean;
var MI: Console_Screen_Buffer_Info;
C: Coord;
SR: Small_Rect;
begin
if not (GetConsoleScreenBufferInfo (TextRec (Output).Handle, MI)) then
SysVideoModeSelector := false
else
begin
with MI do
begin
C.X := VideoMode.Col;
C.Y := VideoMode.Row;
end;
with SR do
begin
Top := 0;
Left := 0;
{ First, we need to make sure we reach the minimum window size
to always fit in the new buffer after changing buffer size. }
Right := MI.srWindow.Right - MI.srWindow.Left;
if VideoMode.Col <= Right then
Right := Pred (VideoMode.Col);
Bottom := MI.srWindow.Bottom - MI.srWindow.Top;
if VideoMode.Row <= Bottom then
Bottom := Pred (VideoMode.Row);
end;
if SetConsoleWindowInfo (cardinal (TextRec (Output).Handle), true, SR) then
if SetConsoleScreenBufferSize (TextRec (Output).Handle, C) then
begin
with SR do
begin
{ Now, we can resize the window to the final size. }
Right := Pred (VideoMode.Col);
Bottom := Pred (VideoMode.Row);
end;
if SetConsoleWindowInfo (cardinal (TextRec (Output).Handle), true, SR) then
begin
SysVideoModeSelector := true;
SetCursorType (LastCursorType);
ClearScreen;
end
else
begin
SysVideoModeSelector := false;
SetConsoleScreenBufferSize (TextRec (Output).Handle, MI.dwSize);
SetConsoleWindowInfo (cardinal (TextRec (Output).Handle), true, MI.srWindow);
SetCursorType (LastCursorType);
end
end
else
begin
SysVideoModeSelector := false;
SetConsoleWindowInfo (cardinal (TextRec (Output).Handle), true, MI.srWindow);
SetCursorType (LastCursorType);
end
else
SysVideoModeSelector := false;
end;
end;
Const
SysVideoModeCount = 6;
SysVMD : Array[0..SysVideoModeCount-1] of TVideoMode = (
(Col: 40; Row: 25; Color: True),
(Col: 80; Row: 25; Color: True),
(Col: 80; Row: 30; Color: True),
(Col: 80; Row: 43; Color: True),
(Col: 80; Row: 50; Color: True),
(Col: 80; Row: 25; Color: True) // Reserved for TargetEntry
);
Function SysSetVideoMode (Const Mode : TVideoMode) : Boolean;
Var
I : Integer;
begin
I:=SysVideoModeCount-1;
SysSetVideoMode:=False;
While (I>=0) and Not SysSetVideoMode do
If (Mode.col=SysVMD[i].col) and
(Mode.Row=SysVMD[i].Row) and
(Mode.Color=SysVMD[i].Color) then
SysSetVideoMode:=True
else
Dec(I);
If SysSetVideoMode then
begin
if SysVideoModeSelector(Mode) then
begin
ScreenWidth:=SysVMD[I].Col;
ScreenHeight:=SysVMD[I].Row;
ScreenColor:=SysVMD[I].Color;
end else SysSetVideoMode := false;
end;
end;
Function SysGetVideoModeData (Index : Word; Var Data : TVideoMode) : boolean;
begin
SysGetVideoModeData:=(Index<=high(SysVMD));
If SysGetVideoModeData then
Data:=SysVMD[Index];
end;
Function SysGetVideoModeCount : Word;
begin
SysGetVideoModeCount:=SysVideoModeCount;
end;
procedure SysClearScreen;
begin
UpdateScreen(true);
end;
procedure SysUpdateScreen(Force: Boolean);
type WordRec = record
One, Two: Byte;
end; { wordrec }
var
BufSize,
BufCoord : COORD;
WriteRegion : SMALL_RECT;
LineBuf : Array[0..(1024*32) - 1] of TCharInfo;
BufCounter : Longint;
LineCounter,
ColCounter : Longint;
smallforce : boolean;
x1,y1,x2,y2 : longint;
p1,p2,p3 : PCardinal;
j : integer;
begin
if force then
smallforce:=true
else
begin
{$ifdef cpui386}
asm
pushl %esi
pushl %edi
movl VideoBuf,%esi
movl OldVideoBuf,%edi
movl VideoBufSize,%ecx
shrl $2,%ecx
repe
cmpsl
setne smallforce
popl %edi
popl %esi
end;
{$else}
{$ifdef cpux86_64}
asm
pushq %rsi
pushq %rdi
xorq %rcx,%rcx
movq VideoBuf(%rip),%rsi
movq OldVideoBuf(%rip),%rdi
movl VideoBufSize(%rip),%ecx
shrq $2,%rcx
repe
cmpsl
setne smallforce
popq %rdi
popq %rsi
end;
{$else}
{$INFO No optimized version for this CPU, reverting to a pascal version}
j:=Videobufsize shr 2;
smallforce:=false;
p1:=pcardinal(VideoBuf);
p2:=pcardinal(OldVideoBuf);
p3:=@pcardinal(videobuf)[j];
while (p1<p3) and (p1^=p2^) do
begin
inc(p1); inc(p2);
end;
smallforce:=p1<>p3;
{$ENDIF}
{$endif}
end;
if SmallForce then
begin
BufSize.X := ScreenWidth;
BufSize.Y := ScreenHeight;
BufCoord.X := 0;
BufCoord.Y := 0;
with WriteRegion do
begin
Top :=0;
Left :=0;
Bottom := ScreenHeight-1;
Right := ScreenWidth-1;
end;
BufCounter := 0;
x1:=ScreenWidth+1;
x2:=-1;
y1:=ScreenHeight+1;
y2:=-1;
for LineCounter := 1 to ScreenHeight do
begin
for ColCounter := 1 to ScreenWidth do
begin
if (WordRec(VideoBuf^[BufCounter]).One<>WordRec(OldVideoBuf^[BufCounter]).One) or
(WordRec(VideoBuf^[BufCounter]).Two<>WordRec(OldVideoBuf^[BufCounter]).Two) then
begin
if ColCounter<x1 then
x1:=ColCounter;
if ColCounter>x2 then
x2:=ColCounter;
if LineCounter<y1 then
y1:=LineCounter;
if LineCounter>y2 then
y2:=LineCounter;
end;
if useunicodefunctions then
LineBuf[BufCounter].UniCodeChar := Widechar(mapcp850[WordRec(VideoBuf^[BufCounter]).One].unicode)
else
LineBuf[BufCounter].UniCodeChar := Widechar(WordRec(VideoBuf^[BufCounter]).One);
{ If (WordRec(VideoBuf^[BufCounter]).Two and $80)<>0 then
LineBuf^[BufCounter].Attributes := $100+WordRec(VideoBuf^[BufCounter]).Two
else }
LineBuf[BufCounter].Attributes := WordRec(VideoBuf^[BufCounter]).Two;
Inc(BufCounter);
end; { for }
end; { for }
BufSize.X := ScreenWidth;
BufSize.Y := ScreenHeight;
with WriteRegion do
begin
if force then
begin
Top := 0;
Left :=0;
Bottom := ScreenHeight-1;
Right := ScreenWidth-1;
BufCoord.X := 0;
BufCoord.Y := 0;
end
else
begin
Top := y1-1;
Left :=x1-1;
Bottom := y2-1;
Right := x2-1;
BufCoord.X := x1-1;
BufCoord.Y := y1-1;
end;
end;
{
writeln('X1: ',x1);
writeln('Y1: ',y1);
writeln('X2: ',x2);
writeln('Y2: ',y2);
}
if useunicodefunctions then
WriteConsoleOutputW(TextRec(Output).Handle, @LineBuf, BufSize, BufCoord, WriteRegion)
else
WriteConsoleOutput(TextRec(Output).Handle, @LineBuf, BufSize, BufCoord, WriteRegion);
move(VideoBuf^,OldVideoBuf^,VideoBufSize);
end;
end;
Const
SysVideoDriver : TVideoDriver = (
InitDriver : @SysInitVideo;
DoneDriver : @SysDoneVideo;
UpdateScreen : @SysUpdateScreen;
ClearScreen : @SysClearScreen;
SetVideoMode : @SysSetVideoMode;
GetVideoModeCount : @SysGetVideoModeCount;
GetVideoModeData : @SysGetVideoModeData;
SetCursorPos : @SysSetCursorPos;
GetCursorType : @SysGetCursorType;
SetCursorType : @SysSetCursorType;
GetCapabilities : @SysGetCapabilities
);
procedure TargetEntry;
var
C: Coord;
SR: Small_Rect;
VioMode: TConsoleScreenBufferInfo;
begin
GetConsoleScreenBufferInfo (TextRec (Output).Handle, VioMode);
{ Register the curent video mode in reserved slot in System Modes}
with VioMode do
begin
{Assume we have at least 16 colours available in "colour" modes}
SysVMD[SysVideoModeCount-1].Col:=dwMaximumWindowSize.X;
SysVMD[SysVideoModeCount-1].Row:=dwMaximumWindowSize.Y;
SysVMD[SysVideoModeCount-1].Color:=true;
OrigScreenSize := max(dwMaximumWindowSize.X,dwSize.X) * max(dwMaximumWindowSize.Y,dwSize.Y) * SizeOf (Char_Info);
end;
GetMem (OrigScreen, OrigScreenSize);
with C do
begin
X := 0;
Y := 0;
end;
with SR do
begin
Top := 0;
Left := 0;
Right := Pred (VioMode.dwSize.X);
Bottom := Pred (VioMode.dwSize.Y);
end;
if not (ReadConsoleOutput (TextRec (Output).Handle, OrigScreen, VioMode.dwSize, C, SR)) then
begin
FreeMem (OrigScreen, OrigScreenSize);
OrigScreen := nil;
OrigScreenSize := 0;
end;
end;
initialization
SetVideoDriver(SysVideoDriver);
TargetEntry;
finalization
if (OrigScreenSize <> 0) and (OrigScreen <> nil) then
begin
FreeMem (OrigScreen, OrigScreenSize);
OrigScreen := nil;
OrigScreenSize := 0;
end;
end.
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