Delphi 与 DirectX 之 DelphiX(33): TDIB.SmoothRotateWrap();

本例效果图:

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代码文件:

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unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, DIB, StdCtrls;

type
  TForm1 = class(TForm)
    DXPaintBox1: TDXPaintBox;
    Button1: TButton;
    Button2: TButton;
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure FormCreate(Sender: TObject);
    procedure FormDestroy(Sender: TObject);
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

var
  dib: TDIB;

procedure TForm1.Button1Click(Sender: TObject);
const
  ImgPath1 = 'C:\Temp\DX.jpg';
begin
  dib.LoadFromFile(ImgPath1);
  DXPaintBox1.DIB.Assign(dib);
  DXPaintBox1.Width := dib.Width;
  DXPaintBox1.Height := dib.Height;
  DXPaintBox1.Repaint;
end;

procedure TForm1.Button2Click(Sender: TObject);
begin
  DXPaintBox1.DIB.SmoothRotateWrap(dib, dib.Width div 2, dib.Height div 2, 15.5);
  DXPaintBox1.DIB.Assign(dib);
  DXPaintBox1.Repaint;
end;

procedure TForm1.FormCreate(Sender: TObject);
begin
  dib := TDIB.Create;
end;

procedure TForm1.FormDestroy(Sender: TObject);
begin
  dib.Free;
end;

end.