Delphi and DirectX Delphix (): Tdib. Drawadditive ();

This example effect chart:

Code files:

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 Formcreate (Sender:tobject);
Procedure Formdestroy (Sender:tobject);
Procedure Button2click (Sender:tobject);
Procedure Button3click (Sender:tobject);
Procedure Button1Click (Sender:tobject);
Procedure Button4click (Sender:tobject);
End
Var
Form1:tform1;
Implementation
{$R *.DFM}
Var
Dib:tdib;
Procedure Tform1.formcreate (Sender:tobject);
Const
ImgPath1 = ' C:\Temp\test.bmp ';
Begin
Position: = Poscreencenter;
Dib: = Tdib. Create;
Dib. LoadFromFile (IMGPATH1);
Dxpaintbox1.width: = Dib. Width;
Dxpaintbox1.height: = Dib. Height;
End
Procedure Tform1.formdestroy (Sender:tobject);
Begin
Dib. Free;
End
Procedure Tform1.button1click (Sender:tobject);
Begin
DXPaintBox1.DIB.Assign (DIB);
Dxpaintbox1.repaint;
End
Procedure Tform1.button2click (Sender:tobject);
Begin
DXPaintBox1.DIB.Fill (Clwhite);
DXPaintBox1.DIB.DrawAdditive (DIB, 0, 0, Dib.) Width, Dib. Height, 1);
Dxpaintbox1.repaint;
End
Procedure Tform1.button3click (Sender:tobject);
Begin
DXPaintBox1.DIB.Fill (Clwhite);
DXPaintBox1.DIB.DrawAdditive (DIB, 0, 0, Dib.) Width, Dib. Height, 128);
Dxpaintbox1.repaint;
End
Procedure Tform1.button4click (Sender:tobject);
Begin
DXPaintBox1.DIB.Fill (Clblack);
DXPaintBox1.DIB.DrawAdditive (DIB, 0, 0, Dib.) Width, Dib. Height, 128);
Dxpaintbox1.repaint;
End
End.