TIEBitmap.LoadFromFile

Declaration

function LoadFromFile(const FileName: string; bCheckUnknown: Boolean = True): boolean;

Description

Load an image from file (of any format supported by the TImageEnIO class).
If bCheckUnknown is true and the file extension is not known or is incorrect (e.g. a GIF file named MyImage.jpg), then loading will be attempted by analyzing the file content (in the same way as LoadFromFileAuto).

Result will be False if the file is not a recognized file type. Loading errors due to a file not being available will raise an exception.

Note:
◼Alternatively, you can use the loading methods of IO
◼For legacy reasons, LoadFromFile() is an alias of Read()

Examples

var
  bmp: TIEBitmap;
begin
  bmp := TIEBitmap.Create();
  bmp.LoadFromFile('input.jpg');
  bmp.SaveToFile('output.jpg');
  bmp.Free();
end;

Which is the same as...
with TIEBitmap.Create('input.jpg') do
begin
  Write('output.jpg');
  Free;
end;

Also, the same as...
var
  bmp: TIEBitmap;
  io: TImageEnIO;
begin
  bmp := TIEBitmap.Create();
  io := TImageEnIO.CreateFromBitmap(bmp);
  io.LoadFromFile('input.jpg');
  io.SaveToFile('output.jpg');
  io.Free();
  bmp.Free();
end;

// Convert an SVG file to JPEG at max size of 1000x1000 (will be adjusted to maintain aspect ratio)
var
  bmp: TIEBitmap;
begin
  bmp := TIEBitmap.Create();
  try
    bmp.Params.LoadToWidth     := 1000;
    bmp.Params.LoadToHeight    := 1000;
    bmp.Params.AutoScaleImport := True;
    bmp.LoadFromFile('D:\Input.svg');

    bmp.Params.JPEG_Quality    := 90;
    bmp.SaveToFile('D:\Output.jpg');
  finally
    bmp.Free();
  end;
end;

TIEBitmap.LoadFromFile