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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(87): TDIB.DrawTransparent、DrawTranslucent、DrawAlpha();

Delphi 與 DirectX 之 DelphiX(87): TDIB.DrawTransparent、DrawTranslucent、DrawAlpha();

編輯:Delphi

 TDIB.DrawTransparent: 按指定的透明色透明;

  TDIB.DrawTranslucent: 先按指定的透明色透明, 然後再半透明;

  DIB.DrawAlpha: 先按指定的透明色透明, 再按指定的透明度透明.

  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;
  Button5: TButton;
  Button6: TButton;
  Button7: TButton;
  procedure FormCreate(Sender: TObject);
  procedure FormDestroy(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}
var
 dib: TDIB;
procedure TForm1.FormCreate(Sender: TObject);
begin
 dib := TDIB.Create;
 dib.SetSize(DXPaintBox1.Width, DXPaintBox1.Height, 24);
 dib.Fill(0);
 dib.Canvas.Brush.Style := bsClear;
 dib.Canvas.Font.Color := clRed;
 dib.Canvas.Font.Name := 'Tahoma';
 dib.Canvas.Font.Size := 32;
 dib.Canvas.Font.Style := [fsBold];
 dib.Canvas.TextOut(10, 10, 'DelphiX');
 Self.Color := clWhite;
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(Self.Color);
 DXPaintBox1.DIB.DrawTransparent(dib, 0, 0, dib.Width, dib.Height, 0, 0, clBlack);
 DXPaintBox1.Repaint;
end;
procedure TForm1.Button3Click(Sender: TObject);
begin
 DXPaintBox1.DIB.Fill(Self.Color);
 DXPaintBox1.DIB.DrawTransparent(dib, 0, 0, dib.Width, dib.Height, 0, 0, clRed);
 DXPaintBox1.Repaint;
end;
procedure TForm1.Button4Click(Sender: TObject);
begin
 DXPaintBox1.DIB.Fill(Self.Color);
 DXPaintBox1.DIB.DrawTranslucent(dib, 0, 0, dib.Width, dib.Height, 0, 0, clBlack);
 DXPaintBox1.Repaint;
end;
procedure TForm1.Button5Click(Sender: TObject);
begin
 DXPaintBox1.DIB.Fill(Self.Color);
 DXPaintBox1.DIB.DrawTranslucent(dib, 0, 0, dib.Width, dib.Height, 0, 0, clRed);
 DXPaintBox1.Repaint;
end;
procedure TForm1.Button6Click(Sender: TObject);
begin
 DXPaintBox1.DIB.Fill(Self.Color);
 DXPaintBox1.DIB.DrawAlpha(dib, 0, 0, dib.Width, dib.Height, 0, 0, 32, clBlack);
 DXPaintBox1.Repaint;
end;
procedure TForm1.Button7Click(Sender: TObject);
begin
 DXPaintBox1.DIB.Fill(Self.Color);
 DXPaintBox1.DIB.DrawAlpha(dib, 0, 0, dib.Width, dib.Height, 0, 0, 32, clRed);
 DXPaintBox1.Repaint;
end;
end.

 窗體文件:

object Form1: TForm1
 Left = 0
 Top = 0
 Caption = 'Form1'
 ClIEntHeight = 185
 ClIEntWidth = 208
 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 = 193
  Height = 73
  AutoStretch = False
  Center = False
  KeepASPect = False
  Stretch = False
  VIEwWidth = 0
  VIEwHeight = 0
 end
 object Button1: TButton
  Left = 8
  Top = 92
  Width = 67
  Height = 87
  Caption = 'Button1'
  TabOrder = 0
  OnClick = Button1Click
 end
 object Button2: TButton
  Left = 81
  Top = 92
  Width = 58
  Height = 25
  Caption = 'Button2'
  TabOrder = 1
  OnClick = Button2Click
 end
 object Button3: TButton
  Left = 145
  Top = 92
  Width = 57
  Height = 25
  Caption = 'Button3'
  TabOrder = 2
  OnClick = Button3Click
 end
 object Button4: TButton
  Left = 81
  Top = 123
  Width = 58
  Height = 25
  Caption = 'Button4'
  TabOrder = 3
  OnClick = Button4Click
 end
 object Button5: TButton
  Left = 145
  Top = 123
  Width = 57
  Height = 25
  Caption = 'Button5'
  TabOrder = 4
  OnClick = Button5Click
 end
 object Button6: TButton
  Left = 81
  Top = 154
  Width = 58
  Height = 25
  Caption = 'Button6'
  TabOrder = 5
  OnClick = Button6Click
 end
 object Button7: TButton
  Left = 145
  Top = 154
  Width = 55
  Height = 25
  Caption = 'Button7'
  TabOrder = 6
  OnClick = Button7Click
 end
end



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