1.1 --- a/Server/Spectrum/LineSpectrum.cs	Wed Jan 04 18:43:28 2017 +0100
     1.2 +++ b/Server/Spectrum/LineSpectrum.cs	Thu Jan 05 14:54:43 2017 +0100
     1.3 @@ -77,28 +77,21 @@
     1.4              return SpectrumProvider.GetFftData(iFftBuffer, this);
     1.5          }
     1.6  
     1.7 -        public Bitmap CreateSpectrumLine(Size size, Brush brush, Color background, bool highQuality)
     1.8 +        private bool CreateSpectrumLine(Image aImage, Brush brush, Color background, bool highQuality)
     1.9          {
    1.10 -            if (!UpdateFrequencyMappingIfNessesary(size))
    1.11 -            {
    1.12 -                return null;
    1.13 -            }
    1.14 -
    1.15              //get the fft result from the spectrum provider            
    1.16              using (var pen = new Pen(brush, (float)_barWidth))
    1.17              {
    1.18 -                var bitmap = new Bitmap(size.Width, size.Height);
    1.19 -
    1.20 -                using (Graphics graphics = Graphics.FromImage(bitmap))
    1.21 +                using (Graphics graphics = Graphics.FromImage(aImage))
    1.22                  {
    1.23                      PrepareGraphics(graphics, highQuality);
    1.24                      graphics.Clear(background);
    1.25  
    1.26 -                    CreateSpectrumLineInternal(graphics, pen, iFftBuffer, size);
    1.27 +                    CreateSpectrumLineInternal(graphics, pen, iFftBuffer, aImage.Size);
    1.28                  }
    1.29 +            }
    1.30  
    1.31 -            return bitmap;   
    1.32 -            }            
    1.33 +            return true;         
    1.34          }
    1.35  
    1.36          /// <summary>
    1.37 @@ -110,21 +103,26 @@
    1.38          /// <param name="background"></param>
    1.39          /// <param name="highQuality"></param>
    1.40          /// <returns></returns>
    1.41 -        public Bitmap Render(Size size, Color color1, Color color2, Color background, bool highQuality)
    1.42 +        public bool Render(Image aImage, Color color1, Color color2, Color background, bool highQuality)
    1.43          {
    1.44 -            if (!UpdateFrequencyMappingIfNessesary(size))
    1.45 +            if (!UpdateFrequencyMappingIfNessesary(aImage.Size))
    1.46              {
    1.47 -                return null;
    1.48 +                return false;
    1.49              }
    1.50  
    1.51 -            using (
    1.52 -                Brush brush = new LinearGradientBrush(new RectangleF(0, 0, (float)_barWidth, size.Height), color2,
    1.53 -                    color1, LinearGradientMode.Vertical))
    1.54 +            using (Brush brush = new LinearGradientBrush(new RectangleF(0, 0, (float)_barWidth, aImage.Size.Height), color2, color1, LinearGradientMode.Vertical))
    1.55              {
    1.56 -                return CreateSpectrumLine(size, brush, background, highQuality);
    1.57 +                return CreateSpectrumLine(aImage, brush, background, highQuality);
    1.58              }
    1.59          }
    1.60  
    1.61 +        /// <summary>
    1.62 +        /// 
    1.63 +        /// </summary>
    1.64 +        /// <param name="graphics"></param>
    1.65 +        /// <param name="pen"></param>
    1.66 +        /// <param name="fftBuffer"></param>
    1.67 +        /// <param name="size"></param>
    1.68          private void CreateSpectrumLineInternal(Graphics graphics, Pen pen, float[] fftBuffer, Size size)
    1.69          {
    1.70              int height = size.Height;