TIEBitmap.CopyRectTo

Declaration

procedure CopyRectTo(Dest: TIEBitmap; SrcX, SrcY, DstX, DstY: integer; RectWidth, RectHeight: integer; CopyAlpha: boolean = false);

Description

Copies an area of the current image to the Dest bitmap.


Note:
◼Dest must have the same PixelFormat as the image, or the image can be ie1g and dest ie24RGB (i.e. Monochrome to RGB conversion)
◼If the PixelFormat is ie8p, then you may also need to copy the palette

Example

// Method that takes an image, splits it into multiple cells and saves each cell to file
procedure SplitImage(Bitmap: TIEBitmap; cols, rows: integer; DestFolder: string);
var
  cellWidth, cellHeight: Double;
  x,y : Integer;
  outBmp: TIEBitmap;
begin
  cellWidth := Bitmap.Width / cols;
  cellHeight := Bitmap.Height / rows;

  outBmp := TIEBitmap.Create();
  outBmp.Allocate( Round( cellWidth ), Round( cellHeight ));

  for x := 0 to cols do
    for y := 0 to rows do
    begin
      Bitmap.CopyRectTo( outBmp,
                         Round( cellWidth * x ), Round( cellHeight * y ),
                         0, 0,
                         Round( cellWidth ), Round( cellHeight ));
      outBmp.SaveToFile( IncludeTrailingPathDelimiter( DestFolder ) + IntToStr( x ) + '_' + IntToStr( y ) + '.bmp' );
    end;

  outBmp.Free;
end;

TIEBitmap Assignment and Drawing Methods

TBitmap Methods

TCanvas Methods

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