Delphi 与 DirectX 之 DelphiX(14): TPictureCollectionItem.DrawRotate...

TPictureCollectionItem.DrawRotate(); 的同类函数还有:

TPictureCollectionItem.DrawRotateAdd();

TPictureCollectionItem.DrawRotateSub();

TPictureCollectionItem.DrawRotateAlpha();

TPictureCollectionItem.DrawRotateAddCol();

TPictureCollectionItem.DrawRotateSubCol();

TPictureCollectionItem.DrawRotateAlphaCol();

本例分别进行了演示, 运行效果图:

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代码文件:

---

unit Unit1;



interface



uses

  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,

  Dialogs, DXDraws, StdCtrls;



type

  TForm1 = class(TForm)

    DXDraw1: TDXDraw;

    DXImageList1: TDXImageList;

    Button1: TButton;

    Button2: TButton;

    Button3: TButton;

    Button4: TButton;

    Button5: TButton;

    Button6: TButton;

    Button7: TButton;

    procedure FormCreate(Sender: TObject);

    procedure Button1Click(Sender: TObject);

    procedure Button2Click(Sender: TObject);

    procedure Button3Click(Sender: TObject);

    procedure Button4Click(Sender: TObject);

    procedure Button5Click(Sender: TObject);

    procedure Button6Click(Sender: TObject);

    procedure Button7Click(Sender: TObject);

  end;



var

  Form1: TForm1;



implementation



{$R *.dfm}



const

  Angle = 32; {在这里相当于 45° 角}

  clr = $777777;

var

  PicItem: TPictureCollectionItem;



procedure TForm1.FormCreate(Sender: TObject);

const

  ImgPath1 = 'C:\Temp\DelphiX.bmp';

begin

  DXImageList1.DXDraw := DXDraw1;

  PicItem := TPictureCollectionItem(DXImageList1.Items.Add);

  PicItem.Picture.LoadFromFile(ImgPath1);



  Button1.Caption := 'DrawRotateAdd';

  Button2.Caption := 'DrawRotateSub';

  Button3.Caption := 'DrawRotateAlpha';

  Button4.Caption := 'DrawRotateAddCol';

  Button5.Caption := 'DrawRotateSubCol';

  Button6.Caption := 'DrawRotateAlphaCol';

  Button7.Caption := '原始效果';

end;



procedure TForm1.Button1Click(Sender: TObject);

begin

  DXDraw1.Surface.Fill(clr);

  PicItem.DrawRotateAdd(DXDraw1.Surface,

                     DXDraw1.Width div 2, DXDraw1.Height div 2,

                     PicItem.Width, PicItem.Height,

                     0,

                     0.5, 0.5,

                     Angle);

  DXDraw1.Flip;

end;



procedure TForm1.Button2Click(Sender: TObject);

begin

  DXDraw1.Surface.Fill(clr);

  PicItem.DrawRotateSub(DXDraw1.Surface,

                     DXDraw1.Width div 2, DXDraw1.Height div 2,

                     PicItem.Width, PicItem.Height,

                     0,

                     0.5, 0.5,

                     Angle);

  DXDraw1.Flip;

end;



procedure TForm1.Button3Click(Sender: TObject);

begin

  DXDraw1.Surface.Fill(clr);

  PicItem.DrawRotateAlpha(DXDraw1.Surface,

                     DXDraw1.Width div 2, DXDraw1.Height div 2,

                     PicItem.Width, PicItem.Height,

                     0,

                     0.5, 0.5,

                     Angle,

                     128);

  DXDraw1.Flip;

end;



procedure TForm1.Button4Click(Sender: TObject);

begin

  DXDraw1.Surface.Fill(clr);

  PicItem.DrawRotateAddCol(DXDraw1.Surface,

                     DXDraw1.Width div 2, DXDraw1.Height div 2,

                     PicItem.Width, PicItem.Height,

                     0,

                     0.5, 0.5,

                     Angle,

                     clYellow);

  DXDraw1.Flip;

end;



procedure TForm1.Button5Click(Sender: TObject);

begin

  DXDraw1.Surface.Fill(clr);

  PicItem.DrawRotateSubCol(DXDraw1.Surface,

                     DXDraw1.Width div 2, DXDraw1.Height div 2,

                     PicItem.Width, PicItem.Height,

                     0,

                     0.5, 0.5,

                     Angle,

                     clYellow);

  DXDraw1.Flip;

end;



procedure TForm1.Button6Click(Sender: TObject);

begin

  DXDraw1.Surface.Fill(clr);

  PicItem.DrawRotateAlphaCol(DXDraw1.Surface,

                     DXDraw1.Width div 2, DXDraw1.Height div 2,

                     PicItem.Width, PicItem.Height,

                     0,

                     0.5, 0.5,

                     Angle,

                     clYellow);

  DXDraw1.Flip;

end;



procedure TForm1.Button7Click(Sender: TObject);

begin

  DXDraw1.Surface.Fill(clr);

  PicItem.DrawRotate(DXDraw1.Surface,

                     DXDraw1.Width div 2, DXDraw1.Height div 2,

                     PicItem.Width, PicItem.Height,

                     0,

                     0.5, 0.5,

                     Angle);

  DXDraw1.Flip;

end;



end.


 
   

窗体文件:

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object Form1: TForm1

  Left = 0

  Top = 0

  Caption = 'Form1'

  ClientHeight = 226

  ClientWidth = 356

  Color = clBtnFace

  Font.Charset = DEFAULT_CHARSET

  Font.Color = clWindowText

  Font.Height = -11

  Font.Name = 'Tahoma'

  Font.Style = []

  OldCreateOrder = False

  OnCreate = FormCreate

  PixelsPerInch = 96

  TextHeight = 13

  object DXDraw1: TDXDraw

    Left = 8

    Top = 8

    Width = 225

    Height = 211

    AutoInitialize = True

    AutoSize = True

    Color = clBlack

    Display.FixedBitCount = False

    Display.FixedRatio = True

    Display.FixedSize = True

    Options = [doAllowReboot, doWaitVBlank, doCenter, do3D, doDirectX7Mode, doHardware, doSelectDriver]

    SurfaceHeight = 211

    SurfaceWidth = 225

    TabOrder = 0

    Traces = <>

  end

  object Button1: TButton

    Left = 239

    Top = 8

    Width = 112

    Height = 25

    Caption = 'Button1'

    TabOrder = 1

    OnClick = Button1Click

  end

  object Button2: TButton

    Left = 239

    Top = 39

    Width = 112

    Height = 25

    Caption = 'Button2'

    TabOrder = 2

    OnClick = Button2Click

  end

  object Button3: TButton

    Left = 239

    Top = 70

    Width = 112

    Height = 25

    Caption = 'Button3'

    TabOrder = 3

    OnClick = Button3Click

  end

  object Button4: TButton

    Left = 239

    Top = 101

    Width = 112

    Height = 25

    Caption = 'Button4'

    TabOrder = 4

    OnClick = Button4Click

  end

  object Button5: TButton

    Left = 239

    Top = 132

    Width = 112

    Height = 25

    Caption = 'Button5'

    TabOrder = 5

    OnClick = Button5Click

  end

  object Button6: TButton

    Left = 239

    Top = 163

    Width = 112

    Height = 25

    Caption = 'Button6'

    TabOrder = 6

    OnClick = Button6Click

  end

  object Button7: TButton

    Left = 239

    Top = 194

    Width = 112

    Height = 25

    Caption = 'Button7'

    TabOrder = 7

    OnClick = Button7Click

  end

  object DXImageList1: TDXImageList

    Items.ColorTable = {

      0000000000000000000000000000000000000000000000000000000000000000

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    Items = <>

    Left = 192

    Top = 16

  end

end