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 程式師世界 >> 編程語言 >> 更多編程語言 >> Delphi >> 再學 GDI+[82]: TGPImage(2) - GetThumbnailImage - 略縮圖

再學 GDI+[82]: TGPImage(2) - GetThumbnailImage - 略縮圖

編輯:Delphi

本例效果圖:

再學 GDI+[82]: TGPImage(2) - GetThumbnailImage - 略縮圖

  代碼文件:unit Unit1;
interface
uses
 Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
 Dialogs;
type
 TForm1 = class(TForm)
  procedure FormPaint(Sender: TObject);
 end;
var
 Form1: TForm1;
implementation
{$R *.dfm}
uses GDIPOBJ, GDIPAPI;
procedure TForm1.FormPaint(Sender: TObject);
var
 g: TGPGraphics;
 img,imgSmall: TGPImage;
begin
 g := TGPGraphics.Create(Self.Canvas.Handle);
 img := TGPImage.Create('C:temptest.png');
 {如果圖像沒有攜帶略縮圖, 將縮放生成; 略縮圖一般不應超過 120*120}
 imgSmall := img.GetThumbnailImage(32, 32, nil, nil);
 g.DrawImage(img, 0, 0, img.GetWidth, img.GetHeight);
 g.DrawImage(imgSmall, img.GetWidth + 4, 0, imgSmall.GetWidth, imgSmall.GetHeight);
 imgSmall.Free;
 img.Free;
 g.Free;
end;
end.
窗體文件:object Form1: TForm1
 Left = 0
 Top = 0
 Caption = 'Form1'
 ClIEntHeight = 151
 ClIEntWidth = 230
 Color = clBtnFace
 Font.Charset = DEFAULT_CHARSET
 Font.Color = clWindowText
 Font.Height = -11
 Font.Name = 'Tahoma'
 Font.Style = []
 OldCreateOrder = False
 OnPaint = FormPaint
 PixelsPerInch = 96
 TextHeight = 13
end


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