Delphi 与 DirectX 之 DelphiX(17): TPictureCollectionItem.PatternWidth、PatternHeight

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, DXDraws, StdCtrls;



type

  TForm1 = class(TForm)

    DXDraw1: TDXDraw;

    DXImageList1: TDXImageList;

    Button1: TButton;

    Button2: TButton;

    Button3: TButton;

    Button4: TButton;

    Button5: TButton;

    Button6: TButton;

    procedure FormCreate(Sender: TObject);

    procedure Button1Click(Sender: TObject);

    procedure Button2Click(Sender: TObject);

    procedure Button3Click(Sender: TObject);

    procedure Button4Click(Sender: TObject);

    procedure Button5Click(Sender: TObject);

    procedure Button6Click(Sender: TObject);

  end;



var

  Form1: TForm1;



implementation



{$R *.dfm}



var

  PicItem: TPictureCollectionItem;

  w,h: Integer;



procedure TForm1.FormCreate(Sender: TObject);

const

  ImgPath1 = 'C:\Temp\DelphiX.bmp';

begin

  DXImageList1.DXDraw := DXDraw1;

  PicItem := TPictureCollectionItem(DXImageList1.Items.Add);

  PicItem.Picture.LoadFromFile(ImgPath1);

  w := PicItem.Width;

  h := PicItem.Height;

end;



procedure TForm1.Button1Click(Sender: TObject);

begin

  PicItem.PatternWidth := w;

  PicItem.PatternHeight := h;

  DXDraw1.Surface.Fill(0);

  PicItem.Draw(DXDraw1.Surface, 0, 0, 0);

  DXDraw1.Flip;

end;



procedure TForm1.Button2Click(Sender: TObject);

begin

  PicItem.PatternWidth := w * 2;

  PicItem.PatternHeight := h;

  DXDraw1.Surface.Fill(0);

  PicItem.Draw(DXDraw1.Surface, 0, 0, 0);

  DXDraw1.Flip;

end;



procedure TForm1.Button3Click(Sender: TObject);

begin

  PicItem.PatternWidth := w div 2;

  PicItem.PatternHeight := h;

  DXDraw1.Surface.Fill(0);

  PicItem.Draw(DXDraw1.Surface, 0, 0, 0);

  DXDraw1.Flip;

end;



procedure TForm1.Button4Click(Sender: TObject);

begin

  PicItem.PatternWidth := w;

  PicItem.PatternHeight := h * 2;

  DXDraw1.Surface.Fill(0);

  PicItem.Draw(DXDraw1.Surface, 0, 0, 0);

  DXDraw1.Flip;

end;



procedure TForm1.Button5Click(Sender: TObject);

begin

  PicItem.PatternWidth := w;

  PicItem.PatternHeight := h div 2;

  DXDraw1.Surface.Fill(0);

  PicItem.Draw(DXDraw1.Surface, 0, 0, 0);

  DXDraw1.Flip;

end;



procedure TForm1.Button6Click(Sender: TObject);

begin

  PicItem.PatternWidth := w*2;

  PicItem.PatternHeight := h*2;

  DXDraw1.Surface.Fill(0);

  PicItem.Draw(DXDraw1.Surface, 0, 0, 0);

  DXDraw1.Flip;

end;



end.