How to Write an Effect Plugin (Part 1 of 4 - Simple)

[BoltBait]

I've never been happy with the C# Code Syntax Highlighter here on this site, so this tutorial has been moved here:

How to Write an Effect Plugin (Part 1 of 4 - Simple)
This tutorial contains an overview of how Paint.NET works with effects and covers using CodeLab to create a simple effect that does not require any settable user controls.

If you have questions about the tutorial, you can post them here in this thread and I will address them.

[FireFly]

Thanks very much BoltBait

[EvilNeko]

It works but not how my brain can think of it >,< No way I can make this up on my own, but hey, im still learning ^^

Great tut Boltbait!

~EvilNeko

[FireFly]

I was playing around with one of the rainbow sample codes and changed the equations. I came up with a colour wheel that stays saturated. Is there already a plugin like this because it would be cool to release my first

[PineappleQc]

Ahhh! Finally I'd been waiting for that over loooong time!

[HellSpawn]

lol good tut bolt, this can help people tying to learn plugins to actually be aple to make one.

nice work

[The_Lionhearted]

Excellent BoltBait...one of these days when I have the time I'll get into plugin programming...I'm still burnt out from programming all the time at work/school. :mtdew: :mtdew:

[MadJik]

Good job BB,

/joke/

but FireFly was asking for something easier than DotAtTheCenter.

You should have try DotAtZeroZero!

/end of joke/

What we are missing now is a topic where we could post our codelab!

Like this:

int Amount1=128;	//[1,256]Red  (1,256,dft=128)
int Amount2=128;	//[1,256]Green(1,256,dft=128)
int Amount3=128;	//[1,256]Blue (1,256,dft=128)

void Render(Surface dst, Surface src, Rectangle rect) 
{ 
   Rectangle selection = this.EnvironmentParameters.GetSelection(src.Bounds).GetBoundsInt(); 
   ColorBgra CurrentPixel; 
   for(int y = rect.Top; y < rect.Bottom; y++) 
       for (int x = rect.Left; x < rect.Right; x++) 
       { 
           CurrentPixel = src[x,y]; 
           CurrentPixel.R = (byte)(x%Amount1); 
           CurrentPixel.G = (byte)(y%Amount2); 
           CurrentPixel.B = (byte)((x+y)%Amount3); 
           dst[x,y] = CurrentPixel; 
       } 
} 

[usedHONDA]

Nice tut! (Although I may never use it )

[pyrochild]

Hopefully, thanks to this tutorial, we will start seeing a bunch more plugins being published. And, hopefully, they won't all be completely useless.

"Look! I made an Invert Colors plugin!"

"Paint.NET can already do that..."

"I know, but mine is slower!"

"Why did you even bother?"

"Just to see if I could..."

"Great..." *bangs head on wall*

[dragonpyro]

I know C# (at least a little beyond the basics) but It has been confising to me because I can't do anything related to graphics or drawing. Especially making a plug-in for Paint.Net. This tutorial clarified a lot of things for me, but probably not enough for me to accually make a plug-in.

[penguin]

Sticky these. They will really help new programmers (like me)

[BoltBait]

Sticky these. They will really help new programmers (like me)

Thanks. But, I don't like to sticky my own posts as that hardly seems fair. However, if another mod wants to do it, I wouldn't protest.

[barkbark00]

Thanks. But, I don't like to sticky my own posts as that hardly seems fair.

Rick does it....

[The_Lionhearted]

Thanks. But, I don't like to sticky my own posts as that hardly seems fair.

Rick does it....

Hey. It's Rick. He's allowed.

[Cornipsus]

What's the for loop for?

[BoltBait]

What's the for loop for?

The loop is for processing each pixel of the selection one at a time.

The "for y" loop steps through each row, from top to bottom.

The "for x" loop steps through each pixel on the current row from left to right.

When you are inside of the x loop, you are working on a single pixel on the destination canvas.

Each time you finish an X loop, it processes the next row in the Y loop.

Does that help?

[FireFly]

I know the question wasn't directed at me, but yes, it helps - thanks

[trippdoctor]

What about C++ I don't want to learn a whole new language even though C# seems similar and mite be easy to change over.

[Mr Frojo]

You can write plugins in c++ I belive. Theres no tuts or anything on doing that, because most everyone here uses c#. You could probobly build off of these tuts, because c++ and c# arnt all too different.

[TheFreak002]

At last i have found it!

My saviour!

i've always ben meaning to try to write my own plugin though now that i've seen this it confuses me a little .

if You say we need a little knowledge of C#, could someone please give me a link or something which explains how C# works?

For instance I don't understand why at the end of each line you go further and further and open (or close) a "{}"

Please help

[Bob]

http://msdn2.microsoft.com/

[DarkShock]

I just downloaded the new version. I never use it, but maybe I won't fell lazy one day and make a plug-in.

[Richard]

I'm too young and innocent to understand that :oops:

[Panhead]

hhhmmm ive been trying to learn C# this helps a little at the moment, i want to look over it more, that will probably help, i dont know if i know enough C# yet though :?