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|
unit MulThMain;
{$mode objfpc}{$H+}
interface
uses
Classes, SysUtils, FileUtil, LResources, Forms, Controls, Graphics, Dialogs,
ExtCtrls, StdCtrls, BGRABitmap, BGRABitmapTypes;
type
t_Tablo = array [0..319, 0..239] of integer;
{Thread de calcul}
TCalcul = class(TThread)
private
PointX, PointY: integer;
protected
procedure Execute; override;
public
constructor Create(CreateSuspended: boolean);
end;
{Thread d'affichage}
TAffiche = class(TThread)
private
IndexAff: integer;
protected
procedure Execute; override;
public
constructor Create(CreateSuspended: boolean);
end;
{ TForm1 }
TForm1 = class(TForm)
BtnStart: TButton;
BtnStop: TButton;
Image1: TImage;
procedure BtnStartClick(Sender: TObject);
procedure BtnStopClick(Sender: TObject);
procedure FormClose(Sender: TObject; var CloseAction: TCloseAction);
procedure FormCreate(Sender: TObject);
private
{ private declarations }
ThCalc: TCalcul;
ThAff: TAffiche;
public
{ public declarations }
DataReady: PRTLEvent;
Tablo: array [0..15] of t_Tablo;
IndexImg: integer;
end;
var
Form1: TForm1;
implementation
constructor TCalcul.Create(CreateSuspended: boolean);
begin
FreeOnTerminate := True;
inherited Create(CreateSuspended);
end;
procedure TCalcul.Execute;
const
CoinX: array[1..3] of integer = (319, 0, 319);
CoinY: array[1..3] of integer = (0, 239, 239);
var
i, nx, ny,m: integer;
dx2, dy2: integer;
Max, V: integer;
begin
PointX := 160;
PointY := 120;
Form1.IndexImg := 0;
while not Terminated do
begin
PointX := PointX + 10;
if PointX > 320 then
begin
PointX := 10;
PointY := PointY + 10;
if PointY > 230 then
PointY := 10;
end;
for nx := 0 to 319 do
begin
for ny := 0 to 239 do
begin
Form1.Tablo[Form1.IndexImg][nx, ny] := 255-ny;
end;
end;
for nx := PointX-5 to PointX+5 do
begin
for ny := PointY-5 to PointY+5 do
begin
Form1.Tablo[Form1.IndexImg][nx, ny] := 0;
end;
end;
Inc(Form1.IndexImg);
if Form1.IndexImg > 15 then
Form1.IndexImg := 0;
RTLEventSetEvent(Form1.DataReady);
end;
end;
constructor TAffiche.Create(CreateSuspended: boolean);
begin
FreeOnTerminate := True;
inherited Create(CreateSuspended);
end;
procedure TAffiche.Execute;
var
x, y, n: integer;
Bmp: TBGRABitmap;
PSource: PBGRAPixel;
begin
while not Terminated do
begin
RTLEventWaitFor(Form1.DataReady);
Bmp := TBGRABitmap.Create(320, 240);
IndexAff := Form1.IndexImg - 1;
if IndexAff < 0 then
IndexAff := 15;
PSource := Bmp.Data;
x := 0;
y := 0;
for n := 0 to Bmp.NbPixels - 1 do
begin
PSource^.red := Form1.Tablo[IndexAff][x, y];
PSource^.green := Form1.Tablo[IndexAff][x, y];
PSource^.blue := Form1.Tablo[IndexAff][x, y];
Inc(PSource); // aller au pixel suivant
Inc(x);
if x >= 320 then
begin
x := 0;
Inc(y);
end;
end;
Bmp.InvalidateBitmap; // note qu'on a changé par accès direct
Bmp.Draw(Form1.Image1.Canvas, 0, 0, True); // affiche l'image calculée en mode opaque
Bmp.Free;
Sleep(16);
Synchronize(@Form1.Image1.Refresh);
end;
end;
{ TForm1 }
procedure TForm1.BtnStartClick(Sender: TObject);
begin
thCalc := TCalcul.Create(False);
ThAff := TAffiche.Create(False);
BtnStart.Enabled := False;
BtnStop.Enabled:=true;
end;
procedure TForm1.BtnStopClick(Sender: TObject);
begin
thCalc.Terminate;
ThAff.Terminate;
BtnStart.Enabled := True;
BtnStop.Enabled:=false;
end;
procedure TForm1.FormClose(Sender: TObject; var CloseAction: TCloseAction);
begin
thCalc.Terminate;
ThAff.Terminate;
end;
procedure TForm1.FormCreate(Sender: TObject);
begin
DataReady := RTLEventCreate;
DoubleBuffered := True;
end;
initialization
{$I MulThMain.lrs}
end. |
Comment garder une interface active durant un long traitement (ou, de l'usage de ProcessMessages) ?
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Envoyé par pem1996
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