table.setTableImageHandle(
          GLTools.getImageHandle(
                GLTools.loadEncodedJPGImage( settings.fileSystemEncryptionKey, path + '\images\table.encoded.jpg')
                )
          );

function loadEncodedJPGImage(Key, sourceFile:String) : TJPEGImage;
begin
...
    mStream := TMemoryStream.Create;
    mStream := loadEncodedFile(Key, sourceFile);
    mStream.Position := 0;
    try
      Result := TJPEGImage.Create;
      Result.LoadFromStream(mStream);
      mStream.Free;
    except
      Result := nil;
      mStream.Free;
    end;

function getImageHandle(AJpg : TJPEGImage):GLuInt;
var
  BMP : TBitmap;
begin
  BMP:=TBitmap.Create;
  BMP.pixelformat:=pf32bit;
  BMP.width:=AJpg.width;
  BMP.height:=AJpg.height;
  BMP.canvas.draw(0,0,AJpg);        // Copy the JPEG onto the Bitmap
  Result := getImageHandle(BMP);
  BMP.free;

...
function getImageHandle(Abmp : TBitMap):GLuInt;
var
  Data : TGLBMPData;
begin
  Data := convertBMP2GLData(Abmp);
  Result := getImageHandle(Data);
end;

function getImageHandle(iData : TGLBMPData): GLuInt;
begin
  Result := CreateTexture(iData.Width, iData.Height, GL_RGBA, addr(iData.Data[0]));
end;