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); 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; 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.