What's a "power of two"?

[Xoria]

To get rid of those white blocks when loading an img ,

somebody w/ the same question said that this can help:

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local mc, ml = math.ceil, math.log
local ml2inv = 1/ml(2)
nx = mc(ml(x)*ml2inv)
ny = mc(ml(y)*ml2inv)

from this topic: http://love2d.org/forum/viewtopic.php?f ... ite#p10585

It's a bit vague, and how can this code get rid of those white boxes precisely? Where in a code like

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ball=love.graphics.newImage('redball.png')
function love.draw()
  love.graphics.draw(ball,200,200)
end

this can I incorperate it? Thanks much.

[Taehl]

A power of two is a number that's made by multiplying 2 by 2 some number of times. The powers of two are 1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, 4096, 8192, and so on. Graphics cards prefer textures with dimensions which are powers of two. Some graphics cards actually can't handle anything else.

So, the easiest way to fix your graphics problems would be to resize your image to a power of two. For instance, if the image is 100x200 pixels, make it 128x256.

[Xoria]

Ohhhhh, so it's that straight forward, Thank you!

[Robin]

And if you don't like to resize all your images, you can put this file in your project folder:

padding.lua

(583 Bytes) Downloaded 232 times

, add this line at the start of main.lua:

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require "padding"

and you're done.

[Ilukha]

And if you don't like to resize all your images, you can put this file in your project folder...

Cool stuff! Is there any reason for padding to not to be done implicitly in the code? The lack of padding makes most Love demos fail on some integrated graphics cards

[Robin]

Cool stuff! Is there any reason for padding to not to be done implicitly in the code? The lack of padding makes most Love demos fail on some integrated graphics cards

Before 0.6, this was the case, but it caused some trouble with aligning and rotating images (and maybe more).