[solved] Color display problem

[Bigfoot71]

Hello, I'm writing on this forum because I'm starting to discover love2d but each time I have the same color display problem and I couldn't find other topics talking about it.

When I want to display gray (depending on the hues) it's only either white or black, no gray to display...

I'm not talking about the other colors and the alpha channel doesn't work either, whatever its value, everything is displayed as if the opacity is at 100%.

I thought I had a hardware problem but I tried my projects on several screens and always the same result... However, I also redid a piece of code almost identical with PyGame which worked but not with Love2D ...

If you know what this could be due to, I don't put any particular example because even a simple

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love.graphics.setColor( 0, 0, 0, 135 )
love.graphics.rectangle( "fill", 0, 0, window.w, window.h )

does not work.

I also tried with setBlendMode and many other "tweaks" but I had no results. Maybe I used it wrong...

Thank a lot !

[GVovkiv]

love from 11(?) uses from 0-1, not 0-255
so in your case it should be something like

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love.graphics.setColor( 0, 0, 0, 0.5 )

https://love2d.org/wiki/love.graphics.setColor

[BrotSagtMist]

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love.graphics.setColor( 0, 0, 0, 135 )

13500% invisible!
It covers your screen into a klingon deflection shield.
Joke aside, colour functions use floats not ints.
The reason being that screen tech is not limited to 8bit/256values anymore.

[dusoft]

Hello, I'm writing on this forum because I'm starting to discover love2d but each time I have the same color display problem and I couldn't find other topics talking about it.

Also see this:
https://love2d.org/wiki/love.math.colorFromBytes

You can use that function to convert easily without doing any math yourself.

[Bigfoot71]

Excuse me for my absence, thank you for the explanation and for the function, I had not thought that we should apply it otherwise, thank you again