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 程式師世界 >> 編程語言 >> 更多編程語言 >> Delphi >> Delphi 與 DirectX 之 DelphiX(71): TDIB.Negative;

Delphi 與 DirectX 之 DelphiX(71): TDIB.Negative;

編輯:Delphi

本例效果圖:

  代碼文件:

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;
  Button3: TButton;
  Button4: TButton;
  procedure Button1Click(Sender: TObject);
  procedure Button2Click(Sender: TObject);
  procedure Button3Click(Sender: TObject);
  procedure Button4Click(Sender: TObject);
 end;
var
 Form1: TForm1;
implementation
{$R *.dfm}
procedure TForm1.Button1Click(Sender: TObject);
const
 ImgPath1 = 'C:TempDX.jpg';
begin
 DXPaintBox1.DIB.LoadFromFile(ImgPath1);
 DXPaintBox1.Width := DXPaintBox1.DIB.Width;
 DXPaintBox1.Height := DXPaintBox1.DIB.Height;
 DXPaintBox1.Repaint;
end;
{Negative 是負片效果, 如果超過 8 位色, 這個方法有些問題}
procedure TForm1.Button2Click(Sender: TObject);
begin
 DXPaintBox1.DIB.BitCount := 8;
 DXPaintBox1.DIB.Negative;
 DXPaintBox1.Repaint;
end;
procedure TForm1.Button3Click(Sender: TObject);
begin
 DXPaintBox1.DIB.BitCount := 4;
 DXPaintBox1.DIB.Negative;
 DXPaintBox1.Repaint;
end;
procedure TForm1.Button4Click(Sender: TObject);
begin
 DXPaintBox1.DIB.BitCount := 1;
 DXPaintBox1.DIB.Negative;
 DXPaintBox1.Repaint;
end;
end.


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