Feature request: Pixel stretch

[trickman]

Would it be possible to create such function in 3.0?

[Rick Brewster]

I have absolutely no idea what you're talking about.

[barkbark00]

I was gonna say the same thing...

[trickman]

like this... http://www.deviantart.com/deviation/38428022/

[barkbark00]

Do you want to make an animation, or do you just want to stretch pixels? Its easy to strech pixels, just make a selection that is the entire height of the image and only a few pixels wide(between 1-10ish). Then use the "Move Selected Pixels" tool to strech the selection from either the right or left side.

[trickman]

it isn't just like that if the image is a free form shape with loads of colors...

[barkbark00]

what is your image?

[trickman]

i would post it here, but imageshack is slower than a snail

[barkbark00]

http://www.imagehigh.com/

[trickman]

just forget it...

[Rick Brewster]

Paint.NET is not an animation editor ...

[trickman]

I don't plan on doing animation...

[carbonize]

Get the picture you want to stretch (say half an eye like in the demo).

Paste it into an empty image that is wider than it is and align it to the left.

Then either:

Use square selection box to hilight the right hand side of the pasted image to a width of 1 pixel and use the Move Selection tool to stretch the selected area all the way to the right (as stated above)

or

Use selection tool to select everythign to the right of the image and 1 pixel width of the right of the image and use motion blur

[trickman]

carbonize, but what if the picture ISN'T rectangular?

[carbonize]

Then use the freehand selector and be very very careful lol.

Or

copy the pic to clipboard and keep pasting it over it's self but moving left 1 pixel each time. Or right etc.

Rick I believe what he is after is the kind of drag effect demonstrated in that demonstration. Not animated but static. A bit like OTT motion blur.

[trickman]

yeah that's what I want.

[Sepcot]

Try this in the Code Lab...

void Render(Surface dst, Surface src, Rectangle rect)
{
   for(int y = rect.Top; y < rect.Bottom; y++)
   {
       for (int x = rect.Left; x < rect.Right; x++)
       {
           ColorBgra pix = src[0, y];
           dst[x, y] = pix;
       }
   }
}

Is that what you were looking for?

[trickman]

nope. only the first column of pix's are stretched...

[Sepcot]

nope. only the first column of pix's are stretched...

That looks like what is being done in the animation... Just change the x-offset to get your desired look.

[trickman]

but i said i didn't simply wanted that, i want to stretch the last pixel of each row that doesn't have Alpha = 0

[entY8]

nope. only the first column of pix's are stretched...

try this one and modify start to you liking:

const int start = 0;

void Render(Surface dst, Surface src, Rectangle rect)
{
   for(int y = rect.Top; y < rect.Bottom; y++)
   {
       for (int x = rect.Left; x < rect.Right; x++)
       {
           if (x < start)
           {
               dst[x, y] = src[x, y];
           }
           else
           {
               dst[x, y] = src[start, y];
           }
       }
   }
} 

(boy is my c# bad :?)

edit: 2 posts in between :?

however... you mean, you want a not-straight starting line for your pixel stretch?

edit2: sepcots one below looks nice :wink:

[Sepcot]

but i said i didn't simply wanted that, i want to stretch the last pixel of each row that doesn't have Alpha = 0

My bad trickman, is this more of what you are looking for?

void Render(Surface dst, Surface src, Rectangle rect)
{
   for(int y = rect.Top; y < rect.Bottom; y++)
   {
       for (int x = rect.Left; x < rect.Right; x++)
       {
           if (x > 0) dst[x, y] = (0 == src[x,y].A) ? dst[x-1, y] : src[x, y]; 
       }
   }
}

[carbonize]

Not sure how the PnD plugins work but I think to get the effect you would have to go along each horizontal row until you find the last pixel that is no transparent (or a specified colour). Then take that colour and fill in the rest of the row using it. Once you've filled in the rest of the row drop down a row and repeat with the next row. and so on and so forth.

Might even be easier to go from right to left, keeping count of the number of empty pixels, and then when you find a non-empty pixel get the colour of it and fill in x number of pixels with that colour where x is the number of pixels you've just counted.

[barkbark00]

you guys should make a plugin that allows you to strech the selection verticaly of horizontaly!!

[carbonize]

If there's a page somwhere explaining the variables available to plugins I could try and make one. It's years since I coded anything but I script in PHP and thats pretty similar.