Delphi与DirectX之DelphiX(85): TDIB.DrawTo();

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;
   Button1: TButton;
   Button2: TButton;
   procedure Button1Click(Sender: TObject);
   procedure Button2Click(Sender: TObject);
   procedure FormCreate(Sender: TObject);
   procedure FormDestroy(Sender: TObject);
  end;
var
  Form1: TForm1;
implementation
{$R *.dfm}
var
  dib: TDIB;
procedure TForm1.Button1Click(Sender: TObject);
begin
  DXPaintBox1.DIB.Fill(clGray);
  DXPaintBox1.DIB.DrawTo(dib,
             dib.Width div 3, dib.Height div 3,
             dib.Width, dib.Height,
             0, 0);
  DXPaintBox1.Repaint;
end;
procedure TForm1.Button2Click(Sender: TObject);
begin
  DXPaintBox1.DIB.Fill(clGray);
  DXPaintBox1.DIB.DrawTo(dib,
             0, 0,
             dib.Width, dib.Height,
             dib.Width div 3, dib.Height div 3);
  DXPaintBox1.Repaint;
end;
procedure TForm1.FormCreate(Sender: TObject);
const
  ImgPath1 = 'C:\Temp\DX.jpg';
begin
  dib := TDIB.Create;
  dib.LoadFromFile(ImgPath1);
  DXPaintBox1.DIB.Assign(dib);
  DXPaintBox1.Width := dib.Width;
  DXPaintBox1.Height := dib.Height;
  DXPaintBox1.Repaint;
end;
procedure TForm1.FormDestroy(Sender: TObject);
begin
  dib.Free;
end;
end.

时间: 2024-09-11 05:11:36

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