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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:\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.

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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