delphi - 如何将图片边框改为圆形

Question

我必须使用图像作为通知。为此图像边框应为椭圆形。任何人都可以帮助我将图像边框更改为圆形。 我已经提到示例图像 10 应该是一个图像组件。我怎样才能获得它的圆形形状。

提前致谢。你的拉克什

Answer 1

const
  BORDER = 3;
Var
  Bmp : TBitmap;
  w, h: Integer;
  x, y: Integer;
begin
  Bmp:=TBitmap.Create;
  try
    Bmp.PixelFormat:=pf24bit;
    Bmp.Canvas.Font.Name  :='Arial';                            // set the font to use
    Bmp.Canvas.Font.Size  :=20;                                 //set the size of the font
    Bmp.Canvas.Font.Color := clWhite;                           //set the color of the text
    w          :=Bmp.Canvas.TextWidth(IntToStr(sped1.Value));   //calculate the width of the image
    h          :=Bmp.Canvas.TextHeight(IntToStr(sped1.Value));  //calculate the height of the image
    Bmp.Width  := Max(w, h) + BORDER * 2;                       // get a square
    Bmp.Height := Max(w, h) + BORDER * 2;                       // get a square
    x          := (Bmp.Width  - w) div 2;                       // center
    y          := (Bmp.Height - h) div 2;                       // center
    Bmp.Canvas.Brush.Color := clBlue;                           //set the background
    Bmp.Canvas.FillRect(Rect(0,0, Bmp.Width, Bmp.Height));      //paint the background which is transparent
    Bmp.Canvas.Brush.Color := clRed;                            // circle in red
    Bmp.Canvas.Pen.Color   := clRed;                            // circle in red
    Bmp.Canvas.Ellipse(0, 0, Bmp.Width, Bmp.Height);            // draw the circle
    Bmp.Canvas.TextOut(x, y, IntToStr(sped1.Value));            //draw the number
    img1.Picture.Assign(bmp);                                   // assign the bmp to the image ; image.transparent = true, .stretch = true;
  finally
    Bmp.Free;
  end;

根据需要调整不同的值...

<小时/>

更新源 RRUZ