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:

---

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