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{
Ported to FPC by Nikolay Nikolov (nickysn@users.sourceforge.net)
}
{
Clip example for OpenPTC 1.0 C++ implementation
Copyright (c) Glenn Fiedler (ptc@gaffer.org)
This source code is in the public domain
}
program ClipExample;
{$MODE objfpc}
uses
ptc;
var
console: IPTCConsole;
surface: IPTCSurface;
format: IPTCFormat;
x1, y1, x2, y2: Integer;
pixels: PUint32;
width, height: Integer;
i: Integer;
x, y, r, g, b: Integer;
begin
try
try
{ create console }
console := TPTCConsoleFactory.CreateNew;
{ create format }
format := TPTCFormatFactory.CreateNew(32, $00FF0000, $0000FF00, $000000FF);
{ open the console }
console.open('Clip example', format);
{ create surface matching console dimensions }
surface := TPTCSurfaceFactory.CreateNew(console.width, console.height, format);
{ calculate clip coordinates }
x1 := console.width div 4;
y1 := console.height div 4;
x2 := console.width - x1;
y2 := console.height - y1;
{ set clip area }
console.clip(TPTCAreaFactory.CreateNew(x1, y1, x2, y2));
{ 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 to console }
surface.copy(console);
{ update console }
console.update;
end;
finally
if Assigned(console) then
console.close;
end;
except
on error: TPTCError do
{ report error }
error.report;
end;
end.
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