Paint.NET Scanlines Effect
This is just a quick hack to add scanlines to a layer. Scan lines are black lines inserted every few lines of your drawing to make your drawing look like it is showing on television. Once you run this effect it might look good to glow the resulting layer a little bit. Or, not. Your choice.
The Idea
I just opened the source code to my Grid Maker plugin and took out all the stuff that didn't fit!
The Effect DLL
You can download the precompiled effect DLL here: ScanLines.dll
Just drop this file in your \program files\Paint.NET\effects directory and you should be all set.
If you need help installing effects, read this page: Installing Effects
Instructions for Use
The best way to use this is to follow these steps:
1. Open your graphic.
2. Click the Effects menu and select Render > Scan Lines
3. Adjust the sliders for the desired effect.
Source Code
Here is the CodeLab script that you can compile yourself:
int Amount1=5; //[2,25]Scanline Width
int Amount2=1; //[1,5]Brush Width
int Amount3=0; //[0,1]Horizontal Vertical
void Render(Surface dst, Surface src, Rectangle rect)
{
// User Interface elements
int GridSize = Amount1;
bool SwapColors = (Amount2 == 1);
// Other variables
PdnRegion selectionRegion = EnvironmentParameters.GetSelection(src.Bounds);
ColorBgra CurrentPixel;
bool Odd = false;
// Get the current brush width for grids
int w = Amount2;
bool Orientation = (Amount3 == 0);
ColorBgra PrimaryColor;
PrimaryColor.A = 255;
PrimaryColor.R = 0;
PrimaryColor.G = 0;
PrimaryColor.B = 0;
// Loop through all the pixels
for(int y = rect.Top; y < rect.Bottom; y++)
{
for (int x = rect.Left; x < rect.Right; x++)
{
// Only work with a pixel if it is selected
// (this handles convex & concave selections)
if (selectionRegion.IsVisible(x, y))
{
// Get the source pixel
CurrentPixel = src[x,y];
Odd = false;
for (int t=0; t<w; t++)
{
if (Orientation)
{
if (((y-t) % GridSize) == 0)
Odd = true;
}
else
{
if (((x-t) % GridSize) == 0)
Odd = true;
}
}
if ( Odd )
{
CurrentPixel.R = (byte)PrimaryColor.R;
CurrentPixel.G = (byte)PrimaryColor.G;
CurrentPixel.B = (byte)PrimaryColor.B;
CurrentPixel.A = (byte)PrimaryColor.A;
}
// Save the (modified?) pixel
dst[x,y] = CurrentPixel;
}
}
}
}