如下内容可将Image1中的图片缩小或者放大 procedure TForm1.Button1Click(Sender: TObject); var bitmap:TBitmap; begin //缩小到窗体 Canvas.StretchDraw(rect(0,0,Image1.Width div 2,Image1.Height div 2), Image1.Picture.Graphic); //缩小到文件 bitmap:=TBitmap.Create; bitmap.Width:=Image1.Width div 2;//宽度缩小一半,你可直接天数字 bitmap.Height:=Image1.Height div 2;//高度缩小一半 bitmap.Canvas.StretchDraw(bitmap.Canvas.ClipRect,Image1.Picture.Graphic); bitmap.SaveToFile('F:\1.bmp'); bitmap.Free; end;
扩大一倍 var IncreaseRect: TRect; begin IncreaseRect := Rect(0,0,image1.Width*2,image1.Height*2); Image2.Canvas.CopyRect(IncreaseRect,image1.Canvas,image1.ClientRect); end;
procedure TForm1.Button1Click(Sender: TObject);
var
bitmap:TBitmap;
begin
//缩小到窗体
Canvas.StretchDraw(rect(0,0,Image1.Width div 2,Image1.Height div 2),
Image1.Picture.Graphic);
//缩小到文件
bitmap:=TBitmap.Create;
bitmap.Width:=Image1.Width div 2;//宽度缩小一半,你可直接天数字
bitmap.Height:=Image1.Height div 2;//高度缩小一半
bitmap.Canvas.StretchDraw(bitmap.Canvas.ClipRect,Image1.Picture.Graphic);
bitmap.SaveToFile('F:\1.bmp');
bitmap.Free;
end;
var
IncreaseRect: TRect;
begin
IncreaseRect := Rect(0,0,image1.Width*2,image1.Height*2);
Image2.Canvas.CopyRect(IncreaseRect,image1.Canvas,image1.ClientRect);
end;