Delphi與DirectX之DelphiX(10)

本例效果圖:

代碼文件:

unit Unit1;
interface
uses
　Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
　Dialogs, DXDraws, StdCtrls, DXClass;
type
　TForm1 = class(TForm)
　　DXDraw1: TDXDraw;
　　DXImageList1: TDXImageList;
　　Button1: TButton;
　　Button2: TButton;
　　procedure FormCreate(Sender: TObject);
　　procedure Button1Click(Sender: TObject);
　　procedure Button2Click(Sender: TObject);
　end;
var
　Form1: TForm1;
implementation
{$R *.dfm}
var
　PicItem: TPictureCollectionItem;
procedure TForm1.FormCreate(Sender: TObject);
const
　ImgPath1 = 'C:\Temp\DelphiX.bmp';
begin
　DXImageList1.DXDraw := DXDraw1;
　PicItem := TPictureCollectionItem(DXImageList1.Items.Add);
　PicItem.Picture.LoadFromFile(ImgPath1);
end;
procedure TForm1.Button1Click(Sender: TObject);
begin
　DXDraw1.Surface.Fill(0);
　PicItem.StretchDraw(DXDraw1.Surface, DXDraw1.Surface.ClientRect, 0);
　DXDraw1.Flip;
end;
procedure TForm1.Button2Click(Sender: TObject);
var
　r: TRect;
begin
　r.Left := (DXDraw1.Width - PicItem.Width) div 2;
　r.Top := (DXDraw1.Height - PicItem.Height) div 2;
　r.Right := r.Left + PicItem.Width;
　r.Bottom := r.Top + PicItem.Height;
　DXDraw1.Surface.Fill(0);
　PicItem.StretchDraw(DXDraw1.Surface, r, 0);
　DXDraw1.Flip;
end;
end.