Add option to load images from Resources rather than as include files

[GrahamNZ]

In my version of 1.4.1 I have replaced the loading of images using fpgImages.AddMaskedBMP so that the images are saved as resources rather than hard coded as include files. This also means I can use PNG files as well as BMP ones.

My main reason for this was that I couldn't work out how to implement High DPI (issue #59) and ended up scaling my forms manually, so when I load the image I resample it to the size I want. But it might be useful in general as creating and maintaining the include files is a bit inconvenient. My code is:

    procedure FPGAddMask(ResName:string; MaskId:string; siz:integer);
    var   ResPng        : TBGRABitmap;
          WrkStream     : TMemoryStream;
    begin
       ResPng:=TBGRABitmap.Create;
       ResPng.LoadFromResource(ResName);
       BGRAReplace(ResPng, ResPng.Resample(siz, siz, rmFineResample));
     
       WrkStream:=TMemoryStream.Create;
       ResPng.SaveToStreamAs(WrkStream, ifBmp);    // force conversion to BMP
       ResPng.Free;
     
       fpgImages.AddMaskedBMP(
          MaskId,
          WrkStream.Memory,
          WrkStream.Size, 0,0);
     
      WrkStream.Free;
    end;

So then I have code like:

   NewSiz:=round(scale * 16);
   FPGAddMask('FPG_ROTATE','myimg.rotate',NewSiz);

But it uses BGRAbitmap so maybe you won't want to add it as a standard option.