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CD ROM Paradise Collection 4
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CD ROM Paradise Collection 4 1995 Nov.iso
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SCREEN.SWG
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0020_Screen Copy Utility.pas
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Pascal/Delphi Source File
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1993-06-22
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3KB
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107 lines
unit scrncopy;
interface
Const
bord : ARRAY [0..2, 0..5] Of Byte = (
( 32, 32, 32, 32, 32, 32),
( 196, 179, 218, 191, 217, 192),
( 205, 186, 201, 187, 188, 200));
procedure copyscrn (scrn1,scrn2 : Byte);
{copy the screen}
Procedure savescrn (scrn : Byte);
{saves the designated screen in RAM memory}
Procedure restorescrn (scrn : Byte);
{restores the screen to the designated page}
procedure drawborder (Fg,Bg,ur,lc,lr,rc,lines,page : Word);
{draw the borders, optionally clears the screen}
{Fg is the foreground color, Bg is the background color,
ur is the upper row, lc is the left column,
lr is the lower row, rc is the right column,
lines is:
0 for clear screen;
1 for single lines (─┐);
2 for double lines (═╗);
page is the screen page to draw the border on}
implementation
Type
Hold = ARRAY[0..4047] Of Byte;
VAR
x : Word;
tmpscrn : ^Hold;
Procedure copyscrn (scrn1, scrn2 : Byte);
Begin
For x := 0 To 4047 Do
Mem[$B800:(scrn2*$1000+x)] := Mem[$B800:(scrn1*$1000+x)];
End;
Procedure savescrn (scrn : Byte);
Begin
New(tmpscrn);
For x := 0 To 4047 Do
tmpscrn^[x] := Mem[$B800:(scrn*$1000+x)];
End;
Procedure restorescrn (scrn : Byte);
Begin
For x := 0 To 4047 Do
Mem[$B800:(scrn*$1000+x)] := tmpscrn^[x];
Dispose(tmpscrn);
End;
Procedure drawborder (Fg,Bg,ur,lc,lr,rc,lines,page : Word);
VAR
x, y, point : Word;
Begin
page := $B800 + (page * $100);
Fg := 16 * Bg + Fg;
Dec(ur);
Dec(lc);
Dec(lr);
Dec(rc);
point := ur * 80 * 2 + lc * 2;
Mem[page:point] := bord[lines,2];
Mem[page:point + 1] := Fg;
point := point + 2;
For x := point To (ur * 80 * 2 + (rc-1) * 2) + 1 Do Begin
Mem[page:x] := bord[lines,0];
Inc(x);
Mem[page:x] := Fg;
End;
point := ur * 80 * 2 + rc * 2;
Mem[page:point] := bord[lines,3];
Mem[page:point+1] := Fg;
For x := ur + 1 To lr - 1 Do Begin
point := x * 80 * 2 + lc * 2;
Mem[page:point] := bord[lines,1];
Mem[page:point + 1] := Fg;
For y := lc + 1 To rc - 1 Do Begin
point := x * 80 * 2 + y * 2;
Mem[page:point] := 32;
Mem[page:point+1] := Fg;
End;
point := x * 80 * 2 + rc * 2;
Mem[page:point] := bord[lines,1];
Mem[page:point + 1] := Fg;
End;
point := lr * 80 * 2 + lc * 2;
Mem[page:point] := bord[lines,5];
Mem[page:point + 1] := Fg;
point := point + 2;
For x := point To (lr * 80 * 2 + (rc-1) * 2) + 1 Do Begin
Mem[page:x] := bord[lines,0];
Inc(x);
Mem[page:x] := Fg;
End;
point := lr * 80 * 2 + rc * 2;
Mem[page:point] := bord[lines,4];
Mem[page:point+1] := Fg;
End;
End.