用2个image，一个存放完整的图片，还有一个就是你说的，用于显示。delphi里面的案例：var Bitmap: TBitmap; MyRect, MyOther: TRect;begin MyRect := Rect(10,10,100,100); MyOther := Rect(10,111,100, 201); Bitmap := TBitmap.Create; Bitmap.LoadFromFile('c:/windows/tartan.bmp'); Form1.Canvas.BrushCopy(MyRect, Bitmap, MyRect, clBlack); Form1.Canvas.CopyRect(MyOther,Bitmap.Canvas,MyRect); Bitmap.Free;end;
