Delphi与DirectX之DelphiX（86）: TDIB.DrawOn（）;

Delphi与DirectX之DelphiX（86）: TDIB.DrawOn（）;2010-11-08 博客园万一本例效果图:

代码文件:

unit Unit1;
interface
uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, DIB, StdCtrls;
type
  TForm1 = class（TForm）
   DXPaintBox1: TDXPaintBox;
   procedure FormCreate（Sender: TObject）;
   procedure FormDestroy（Sender: TObject）;
   procedure DXPaintBox1MouseUp（Sender: TObject; Button: TMouseButton;
    Shift: TShiftState; X, Y: Integer）;
  end;
var
  Form1: TForm1;
implementation
{$R *.dfm}
var
  dib: TDIB;
procedure TForm1.DXPaintBox1MouseUp（Sender: TObject; Button: TMouseButton;
  Shift: TShiftState; X, Y: Integer）;
begin
  DXPaintBox1.DIB.Fill（clGray）;
  dib.DrawOn（dib.ClientRect, DXPaintBox1.DIB.Canvas, -X, -Y）;
  DXPaintBox1.Repaint;
end;
procedure TForm1.FormCreate（Sender: TObject）;
const
  ImgPath1 = "C:TempDX.jpg";
begin
  dib := TDIB.Create;
  dib.LoadFromFile（ImgPath1）;
  DXPaintBox1.Width := dib.Width;
  DXPaintBox1.Height := dib.Height;
  DXPaintBox1.DIB.SetSize（dib.Width, dib.Height, 24）;
  DXPaintBox1.DIB.Fill（clGray）;
end;
procedure TForm1.FormDestroy（Sender: TObject）;
begin
  dib.Free;
end;
end.