Is it possible to get the color of a pixel on a gui?

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#1

  1. What do you want to achieve? I want to be able to get a color3 from a pixel on a screen gui

  2. What is the issue? how??

  3. What solutions have you tried so far? I cant find anything or how its possible

So lets say I have a ui on the screen, how would I get the color of a pixel of it?

How to get the colour of a pixel on the screen
#2

I don’t think Roblox Studio has any built-in tools to assist you with that. Maybe this post can give you some clue on how you may want to do it.

1 Like
#3

Sadly that post didn’t have any answers.

#4

I’d say the answer is pixel data that you would import from an outside source, because after doing some research I came to the conclusion that pixels cannot be accessed by Roblox Studio tools.

#5

You can get the pixel color of any image using this function.
local function GetPixel(Image, X, Y)
local X = math.clamp(math.floor(X), 1, Image.AbsoluteSize.X)
local Y = math.clamp(math.floor(Y), 1, Image.AbsoluteSize.Y)
local RawData = Image:GetImage()
return Color3.fromRGB(bit32.rshift(bit32.band(RawData[(Y - 1) * Image.AbsoluteSize.X + X], 0xFF000000), 24), bit32.rshift(bit32.band(RawData[(Y - 1) * Image.AbsoluteSize.X + X], 0x00FF0000), 16), bit32.rshift(bit32.band(RawData[(Y - 1) * Image.AbsoluteSize.X + X], 0x0000FF00), 8))
end

You can get the position of the mouse relative to the Image using this function.
local function GetMousePosition(Image)
local Camera = workspace.CurrentCamera
local CFrame = Camera.CFrame
local MouseHit = Camera:WorldToScreenPoint(Mouse.Hit.p)
local ImageHit = Camera:WorldToScreenPoint(CFrame:PointToWorldSpace(Image.AbsolutePosition + Vector3.new(Image.AbsoluteSize.X / 2, Image.AbsoluteSize.Y / 2, 0)))
local MousePosition = MouseHit - ImageHit
MousePosition = Vector2.new(MousePosition.X, MousePosition.Y)
MousePosition = (MousePosition / Image.AbsoluteSize) + Vector2.new(0.5, 0.5)
return MousePosition
end

You can use both of these functions together to get the pixel color of a specific point relative to the mouse.
Image = script.Parent.Image

local function OnMouseMove(Mouse)
local MousePosition = GetMousePosition(Image)
local PixelColor = GetPixel(Image, MousePosition.X, MousePosition.Y)
end

Mouse.Move:Connect(OnMouseMove)

3 Likes
#6

False! I have made it possible to grab image pixels without externals tool with my plugin and module.

This will also work in-game too!

#7

Woah! this looks epic!

This text will be blurred

1 Like
#8

Hey, so your plugin looks really cool, but do you know how I can render everything normally, but have like one or two blocks pixelated whenever I look at them?

#9

Hey, I’m trying out your code, but I get this error.

Players.KUW_Alt1.PlayerGui.ScreenGui.ViewportFrame.LocalScript:18: invalid argument #2 (Vector2 expected, got Vector3)

This is the line of code.

local ImageHit = Camera:WorldToScreenPoint(CFrame:PointToWorldSpace(Image.AbsolutePosition + Vector3.new(Image.AbsoluteSize.X / 2, Image.AbsoluteSize.Y / 2, 0)))

Edit: I replaced it with Vector3.new(1,1,1) to experiment, but now I have this error.

GetImage is not a valid member of ViewportFrame "Players.KUW_Alt1.PlayerGui.ScreenGui.ViewportFrame"

Actually does Image:GetImage() even exist?

1 Like
#10

I can’t find any documentation for :GetImage()

I don’t know what he’s talking about