Slowly making something go transparent in PDN?

[VoidWhisperer]

#region UICode
int Amount1=0;	//[0,100]Slider 1 Description
int Amount2=0;	//[0,100]Slider 2 Description
int Amount3=0;	//[0,100]Slider 3 Description
int runs=255;
int num = 5;
#endregion

void Render(Surface dst, Surface src, Rectangle rect)
{
   // Delete any of these lines you don't need
   Rectangle selection = this.EnvironmentParameters.GetSelection(src.Bounds).GetBoundsInt();
   long CenterX = (long)(((selection.Right - selection.Left) / 2)+selection.Left);
   long CenterY = (long)(((selection.Bottom - selection.Top) / 2)+selection.Top);
   ColorBgra PrimaryColor = (ColorBgra)EnvironmentParameters.PrimaryColor;
   ColorBgra SecondaryColor = (ColorBgra)EnvironmentParameters.SecondaryColor;
   int BrushWidth = (int)EnvironmentParameters.BrushWidth;

   ColorBgra CurrentPixel;
   for (int y = rect.Top; y < rect.Bottom; y++)
   {
       for (int x = rect.Left; x < rect.Right; x++)
       {
           CurrentPixel = src[x,y];
           // TODO: Add pixel processing code here
           // Access RGBA values this way, for example:
           // CurrentPixel.R = (byte)PrimaryColor.R;
           // CurrentPixel.G = (byte)PrimaryColor.G;
          if(CurrentPixel.R != 255 && CurrentPixel.G != 255 && CurrentPixel.B != 255 || CurrentPixel.A > 0){
           CurrentPixel.A = (byte)x;
           runs= runs - 1;
           dst[x,y] = CurrentPixel;
        }
       }
   }
}

I'm trying to write something to make the picture go slowly transparent, and i'm kinda of new to PDN Plugins So, could someone help me fix this? A picture is below:

That, is what is happening ._.

[VoidWhisperer]

Oops -_-' I guess i need to learn to put images on the right way, anyways: this is an image of what's happening:

[Boude]

You mean like fading? You can't, PDN only allows you to have 1 image which only changes once.

[pyrochild]

PDN only allows you to have 1 image which only changes once.

...what are you talking about?

[Boude]

One image which the plug-in can only change once.

[pyrochild]

OP isn't asking for animation, he's asking for a transparent gradient. I think. Maybe. Very ambiguous, really.

What do you mean, VoidWhisperer?

[Boude]

Oh, you're right. I think he means a transparency gradient, by the look of his images.

[VoidWhisperer]

That is pretty much what I am trying to do.

[zarathoustra]

void Render(Surface dst, Surface src, Rectangle rect)
{
   double increment = 255.0 / (double) src.Width;

   for (int x = rect.Left; x < rect.Right; x++)
   {
       byte alpha = (byte) Math.Round(x * increment);

       for (int y = rect.Top; y < rect.Bottom; y++)
       {
           ColorBgra  CurrentPixel = src[x,y];
           CurrentPixel.A = alpha;
           dst[x,y] = CurrentPixel;
       }
   }
}

Edit: in codelab, rather than in pseudocode.