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;
procedure Button1Click(Sender: TObject);
procedure Button2Click(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;
procedure TForm1.Button2Click(Sender: TObject);
var
w,h,i: Integer;
begin
w := DXPaintBox1.DIB.Width;
h := DXPaintBox1.DIB.Height;
for i := 0 to 9999 do begin
DXPaintBox1.DIB.BlendPixel(Random(w), Random(h div 2), clRed, 255);
DXPaintBox1.DIB.BlendPixel(Random(w), Random(h div 2) + (h div 2), clRed, 64);
end;
DXPaintBox1.Repaint;
end;
end.
