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.