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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(94): TDIB.DrawAdditive();

Delphi 與 DirectX 之 DelphiX(94): TDIB.DrawAdditive();

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 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:Temptest.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.

  窗體文件:

object Form1: TForm1
 Left = 0
 Top = 0
 Caption = 'Form1'
 ClIEntHeight = 204
 ClIEntWidth = 253
 Color = clBtnFace
 Font.Charset = DEFAULT_CHARSET
 Font.Color = clWindowText
 Font.Height = -11
 Font.Name = 'Tahoma'
 Font.Style = []
 OldCreateOrder = False
 OnCreate = FormCreate
 OnDestroy = FormDestroy
 PixelsPerInch = 96
 TextHeight = 13
 object DXPaintBox1: TDXPaintBox
  Left = 8
  Top = 8
  Width = 81
  Height = 73
  AutoStretch = False
  Center = False
  KeepASPect = False
  Stretch = False
  VIEwWidth = 0
  VIEwHeight = 0
 end
 object Button1: TButton
  Left = 8
  Top = 174
  Width = 56
  Height = 25
  Caption = 'Button1'
  TabOrder = 0
  OnClick = Button1Click
 end
 object Button2: TButton
  Left = 68
  Top = 174
  Width = 56
  Height = 25
  Caption = 'Button2'
  TabOrder = 1
  OnClick = Button2Click
 end
 object Button3: TButton
  Left = 129
  Top = 174
  Width = 56
  Height = 25
  Caption = 'Button3'
  TabOrder = 2
  OnClick = Button3Click
 end
 object Button4: TButton
  Left = 190
  Top = 174
  Width = 56
  Height = 25
  Caption = 'Button4'
  TabOrder = 3
  OnClick = Button4Click
 end
end


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