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

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:\Temp\DX.jpg';
begin
DXPaintBox1.DIB.LoadFromFile(ImgPath1);
DXPaintBox1.Width := DXPaintBox1.DIB.Width;
DXPaintBox1.Height := DXPaintBox1.DIB.Height;
DXPaintBox1.Repaint;
end;

{Negative 是负片效果, 如果超过 8 位色, 这个方法有些问题}
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.