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

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所属分类:[开发技巧]

本例效果图:

 

代码文件:

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);
private
{ Private declarations }
public
{ Public declarations }
end;

var
Form1: TForm1;

implementation

{$R *.dfm}

var
PicItem: TpictureCollectionItem;
w, h: Integer;

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;

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;

end.

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