TIECanvas.FillRect

Declaration

procedure FillRect(const Rect: TRect); overload;
procedure FillRect(const Rect: TRect; Color: TColor); overload;

Description

Fill an area with the current current brush.
With second overload, a solid color brush is used.

GDI+ Method: GdipFillRectangle

Also see: GradientFillRect

Note: The Rect.Right and Rect.Bottom points are excluded from the painting

Examples

// Highlight an area of a bitmap
iec := TIECanvas.Create( Bitmap.Canvas, false );
iec.Brush.Color := clRed;
iec.Brush.Style := bsSolid;
iec.Brush.Transparency := 125;
iec.FillRect( Rect( 650, 680, 850, 780 ));
iec.Free();


// Create an alpha gradient image
var
  ieBmp: TIEBitmap;
  r: TRect;
begin
  ieBmp := TIEBitmap.Create(320, 240, clWhite );
  try
    r := ieBmp.IECanvas.GDICanvas.ClipRect;
    InflateRect( r, 1, 1 );      // Because Fill may smooth edges

    // Fill image with purple
    ieBmp.IECanvas.FillRect( r, clPurple );

    // Draw gradient to our alpha channnel
    ieBmp.AlphaChannel.PixelFormat := ie24RGB;   // Temporary promote the alpha channel to 24bit to get smoother gradient
    ieBmp.AlphaChannel.IECanvas.GradientFillRect( r, clWhite, clBlack, gpgDiagonal );
    ieBmp.SyncAlphaChannel();                              // Now revert alpha to ie8g

    ieBmp.SaveToFile( 'D:\AlphaGradient.png' );
  finally
    ieBmp.Free;
  end;
end;

---