Examples utility unit
The examples in this section make use of the unit vidutil, which contains the TextOut function. This function writes a text to the screen at a given location. It looks as follows:
Example
unit vidutil;
Interface
uses
video;
Procedure TextOut(X,Y : Word;Const S : String);
Implementation
Procedure TextOut(X,Y : Word;Const S : String);
Var
W,P,I,M : Word;
begin
P:=((X-1)+(Y-1)*ScreenWidth);
M:=Length(S);
If P+M>ScreenWidth*ScreenHeight then
M:=ScreenWidth*ScreenHeight-P;
For I:=1 to M do
VideoBuf^[P+I-1]:=Ord(S[i])+($07 shl 8);
end;
end.