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{
Ported to FPC by Nikolay Nikolov (nickysn@users.sourceforge.net)
}
{
Area example for OpenPTC 1.0 C++ Implementation
Copyright (c) Glenn Fiedler (ptc@gaffer.org)
This source code is in the public domain
}
Program AreaExample;
{$MODE objfpc}
Uses
ptc;
Var
console : TPTCConsole;
format : TPTCFormat;
surface : TPTCSurface;
pixels : PDWord;
width, height : Integer;
i : Integer;
x, y, r, g, b : Integer;
area : TPTCArea;
Begin
area := Nil;
format := Nil;
surface := Nil;
console := Nil;
Try
Try
{ create console }
console := TPTCConsole.Create;
{ create format }
format := TPTCFormat.Create(32, $00FF0000, $0000FF00, $000000FF);
{ create console }
console.open('Area example', format);
{ create surface half the size of the console }
surface := TPTCSurface.Create(console.width Div 2, console.height Div 2, format);
{ setup destination area }
x := console.width Div 4;
y := console.height Div 4;
area := TPTCArea.Create(x, y, x + surface.width, y + surface.height);
{ loop until a key is pressed }
While Not console.KeyPressed Do
Begin
{ lock surface }
pixels := surface.lock;
Try
{ get surface dimensions }
width := surface.width;
height := surface.height;
{ draw random pixels }
For i := 1 To 100 Do
Begin
{ get random position }
x := Random(width);
y := Random(height);
{ get random color }
r := Random(256);
g := Random(256);
b := Random(256);
{ draw color [r,g,b] at position [x,y] }
pixels[x + y * width] := (r Shl 16) + (g Shl 8) + b;
End;
Finally
{ unlock surface }
surface.unlock;
End;
{ copy surface to console destination area }
surface.copy(console, surface.area, area);
{ update console area }
console.update;
End;
Finally
console.close;
console.Free;
surface.Free;
format.Free;
area.Free;
End;
Except
On error : TPTCError Do
{ report error }
error.report;
End;
End.
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