Delphi 图像比例缩放问题 高手来啊

编译器是Delphi 2010

程序错误很多啊

哪个帮忙改下

unit Unit1;

interface

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

type
TForm1 = class(TForm)
Button1: TButton;
procedure Button1Click(Sender: TObject);
end;

var
Form1: TForm1;

implementation

{$R *.dfm}

uses Wincode;

procedure TForm1.Button1Click(Sender: TObject);
var
WicImg: TWICImage;
Factory: IWICImagingFactory;
Scaler: IWICBitmapScaler; {图像比例变换接口}
begin
WicImg := TWICImage.Create;
WicImg.LoadFromFile('c:\temp\test.jpg');
Factory.CreateBitmapScaler(Scaler);

Scaler.Initialize(WicImg.Handle,
WicImg.Width div 2, WicImg.Height div 3,
WICBitmapInterpolationModeFant);

WicImg.Handle := IWICBitmap(Scaler);
Canvas.Draw(0, 0, WicImg);

Scaler := nil;
Factory := nil;
WicImg.Free;
end;

end.

非常简单

第一个错误是你的单元引用错误

应该是 uses Wincodec;

第二个错误是没有对IWI图像进行关联

在 Factory.CreateBitmapScaler(Scaler);上面加一句

Factory := WicImg.ImagingFactory;