Creating screen reading shader with SCREEN_PIXEL_SIZE not working, alternative solution?

[ancient prairie]

When I'm zoomed into the space the shader is working on, the shader works as intended but when I zoom out it expands and distorts

right picture is when I zoom out

I'm having the same issue trying to create a drop shadow

[wide topaz]

well, the shader is applied per pixel right?

how big are the pixels when you zoom out?

[ancient prairie]

My game is rendered at 1920x1080, in game it looks wrong. I just don't understand how it works really

[wide topaz]

you mean how shaders work?

For canvas_item shaders, when you set the COLOR in the fragment function, you are setting it for one pixel

[ancient prairie]

No how I get it to render properly in the right position

[wide topaz]

oh ok

Did you use another shader as reference?

[ancient prairie]

I have been looking up how to make a pixel outline shader and I get how it works, but it doesn't work when I'm sampling the texture on the screen instead of having some texture from memory

[wide topaz]

Oh, you're using a screenreading shader?

[ancient prairie]

Yes

For the text in my game

[wide topaz]

I'm not sure there would be transparency in the texture from a screen-reading shader

[ancient prairie]

No there isn't, that's why I make the text pink

And check to see if the pixel is pink

The outline works as shown in the picture the problem is the zooming

And rendering properly for the resolution

[wide topaz]

let me try the shader

well that's not good

[ancient prairie]

Lmao

[wide topaz]

your text is pink right?

[ancient prairie]

Yeah vec4(0.0,1.0,0.0,1.0)

[wide topaz]

that's green

[ancient prairie]

Oh wait

I'm confused

Yes the tect is pink hold on

[wide topaz]

I think you mean that it's checking the distance from green

pink is the opposite of green

[ancient prairie]

Well that would explain it

[wide topaz]

anyway i will go through the shader code

Why do you multiply the pixel size by 8?

current_pixel = texture(_texture, uv_coord + DIRECTIONS[i] * pixel_size*8.0);

[ancient prairie]

When people make the shader that is the pixel thickness in their shaders

[wide topaz]

But the pixel thickness is already "pixel_size"

[ancient prairie]

Ok I'll try without it

Aaaaah

Sick

I'm having trouble doing the same thing with a shadow shader but I'll keep this in mind when I'm having the issue

[wide topaz]

okay 👍

[ancient prairie]

Thank you so much