Delphi 與 DirectX 之 DelphiX(31): TDIB.Twist();

本例:

代碼檔案:

unit Unit1;interfaceuses  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);    procedure FormCreate(Sender: TObject);    procedure FormDestroy(Sender: TObject);  end;var  Form1: TForm1;implementation{$R *.dfm}var  dib: TDIB;procedure TForm1.Button1Click(Sender: TObject);const  ImgPath1 = 'C:\Temp\DX.jpg';begin  dib.LoadFromFile(ImgPath1);  DXPaintBox1.DIB.Assign(dib);  DXPaintBox1.Width := dib.Width;  DXPaintBox1.Height := dib.Height;  DXPaintBox1.Repaint;end;procedure TForm1.Button2Click(Sender: TObject);begin  DXPaintBox1.DIB.Twist(dib, 128);  DXPaintBox1.DIB.Assign(dib);  DXPaintBox1.Repaint;end;procedure TForm1.FormCreate(Sender: TObject);begin  dib := TDIB.Create;end;procedure TForm1.FormDestroy(Sender: TObject);begin  dib.Free;end;end.

表單檔案:

object Form1: TForm1  Left = 0  Top = 0  Caption = 'Form1'  ClientHeight = 142  ClientWidth = 226  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 = 143    Top = 78    Width = 75    Height = 25    Caption = 'Button1'    TabOrder = 0    OnClick = Button1Click  end  object Button2: TButton    Left = 143    Top = 109    Width = 75    Height = 25    Caption = 'Button2'    TabOrder = 1    OnClick = Button2Click  endend