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| unit Unit1;
{$mode objfpc}{$H+}
interface
uses
Classes, SysUtils, FileUtil, Forms, Controls, Graphics, Dialogs, StdCtrls,
BGRABitmap, BGRABitmapTypes;
type
{ TForm1 }
TForm1 = class(TForm)
Button1: TButton;
procedure Button1Click(Sender: TObject);
procedure dessin();
private
procedure RotateImage(src, dest: TBGRABitmap; rot: Integer);
public
end;
var
Form1: TForm1;
implementation
{$R *.lfm}
procedure TForm1.dessin();
var
iSrc, iDest: TBGRABitmap;
begin
iSrc := TBGRABitmap.Create('d:\a.png'); //image qui fait 800*600
try
iDest := TBGRABitmap.Create(iSrc.Height, iSrc.Width); //image destination pour rotation 90°
try
// rotations et dessin sur le canevas final
RotateImage(iSrc, iDest, 90); // rotation 90°
iDest.Draw(Canvas, 100, 10);
idest.SaveToFile('d:\new_a.png');
finally
iDest.Free;
end;
finally
iSrc.Free;
end;
end;
procedure TForm1.Button1Click(Sender: TObject);
begin
dessin;
end;
procedure TForm1.RotateImage(src, dest: TBGRABitmap; rot: Integer);
// rotation d'une image : 1 = 0 / 2 = 90 / 3 = 180 / 4 = 270
var
Tmp: TBGRABitmap;
begin
Tmp := TBGRABitmap.Create(Src.Width,Src.Height, BGRAblack);
try
tmp.PutImageAngle(src.Width/2,
src.Height/2,
src,
rot,
tmp.Width/2,
tmp.Height/2);
tmp.Draw(dest.Canvas, 0, 0);
finally
Tmp.Free;
end;
end;
end. |
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