TIOParams.ICO_Sizes

Declaration

ICO_Sizes: TIOICOSizes;

Description

An array of TSize structures which specify the dimensions of all images contained in an icon file.

Note: The last item must specify the size as 0 x 0.

Example

// Save the current image as 'output.ico'. It will contain three images with 64x64 32bit (24bit + alphachannel), 32x32 256 colors and 32x32 16 colors

// 64 x 64 x 32bit
ImageEnView.IO.Params.ICO_BitCount[0] := 32;
ImageEnView.IO.Params.ICO_Sizes[0].cx := 64;
ImageEnView.IO.Params.ICO_Sizes[0].cy := 64;

// 32 x 32 x 8bit
ImageEnView.IO.Params.ICO_BitCount[1] := 8;
ImageEnView.IO.Params.ICO_Sizes[1].cx := 32;
ImageEnView.IO.Params.ICO_Sizes[1].cy := 32;

// 32 x 32 x 4bit
ImageEnView.IO.Params.ICO_BitCount[2] := 4;
ImageEnView.IO.Params.ICO_Sizes[2].cx := 32;
ImageEnView.IO.Params.ICO_Sizes[2].cy := 32;

// Specify end of images
ImageEnView.IO.Params.ICO_BitCount[3] := 0;
ImageEnView.IO.Params.ICO_Sizes[3].cx := 0;
ImageEnView.IO.Params.ICO_Sizes[3].cy := 0;

// Save
ImageEnView.IO.SaveToFile('D:\output.ico');


// Load the highest quality frame in an icon file
procedure LoadLargestIconFrame(Dest: TIEBitmap; const IconFile: string);
var
  bmp: TIEBitmap;
  params: TIOParams;
  largestSz, largestIdx, sz: Integer;
  i: Integer;
begin
  bmp := TIEBitmap.Create();
  params := TIOParams.Create();
  try
    if params.Read(IconFile) = False then
      raise Exception.create( 'Load Error' );

    largestIdx := 0;
    if params.ImageCount > 1 then
    begin
      largestSz := 0;
      for i := 0 to params.ImageCount - 1 do
      begin
        sz := params.ICO_Sizes[i].Width * params.ICO_Sizes[i].Height;
        if sz > largestSz then
        begin
          largestSz := sz;
          largestIdx := i;
        end;
      end;
    end;

    params.ImageIndex := largestIdx;
    bmp.Read(IconFile, params);
    Dest.Assign( bmp );

  finally
    params.Free;
    bmp.Free;
  end;
end;

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